CN104412625B

CN104412625B - Channel changes acquisition method, notification method and equipment

Info

Publication number: CN104412625B
Application number: CN201380035317.2A
Authority: CN
Inventors: 成艳; 周永行; 高振兴; 范霄安
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-01-25
Filing date: 2013-01-25
Publication date: 2018-10-19
Anticipated expiration: 2033-01-25
Also published as: WO2014113968A1; CN104412625A

Abstract

A kind of channel change acquisition method of offer of the embodiment of the present invention, notification method and equipment.Acquisition method includes：UE is in Notification of Changes search space, to carrying out scrambled down control channel into row decoding using specified RNTI；Notification of Changes search space is the search space that confession under directions UE obtains that the corresponding MCCH Notifications of Changes of secondary carrier use；UE obtains the information for being used to indicate the corresponding MCCH Notifications of Changes of secondary carrier from the corresponding DCI format of down control channel.Technical solution of the present invention realizes the notice of the corresponding MCCH changes of secondary carrier, convenient for the developing MBMS service in secondary carrier, is conducive to the utilization rate for improving frequency resource.

Description

Channel change learning method, notification method and device

Technical Field

The present invention relates to communications technologies, and in particular, to a channel change learning method, a channel change notification method, and a channel change notification device.

Background

An important characteristic of a Long Term Evolution (LTE) system is that a synchronous Single Frequency Network (MBSFN) is used to transmit multicast data or broadcast data through an Orthogonal Frequency Division Multiplexing (OFDM) wireless interface, and the system is called a Multimedia Broadcast Single Frequency Network (MBSFN) operation. In the LTE system, Multimedia Broadcast Multicast Service (MBMS) is supported on a dedicated carrier, that is, all subframes on the dedicated carrier are used to transmit MBSFN services, and MBMS and unicast services are shared on a single carrier, or mixed MBSFN services are supported, that is, time division multiplexing of MBSFN services and unicast services is implemented on different subframes of a carrier.

In the LTE System, a User Equipment (UE) acquires MBSFN subframe Information (MBSFN-subframe configuration field) in a System Information Block 2(System Information Block 2, abbreviated as SIB2) of a broadcast message, and acquires which subframes in a carrier are MBSFN subframes according to the MBSFN subframe Information. The UE acquires information of the subframe transmitting MBMS in RRC message, which is a subset of the MBSFN subframe acquired in broadcast message SIB 2. The UE reads the SIB13, acquires information of a logical Channel MBMS Control Channel (MBMS Control Channel, abbreviated as MCCH), and acquires information of a logical Channel MBMS Traffic Channel (MBMC Traffic Channel, abbreviated as MTCH) according to an indication of the MCCH information. The UE receives the MBMS on a subframe in which the MBMS is transmitted. The MCCH information is periodically transmitted with a configured repetition period (repetition period). When the MCCH information is changed, a network side device first notifies, in a modification period, that the MCCH information is to be changed, and specifically, sends a Physical Downlink control Channel (PDCCH for short) to the UE, where the PDCCH corresponds to a Downlink Control Information (DCI) format 1C, and the DCI format carries 8-bit information for indicating an MCCH change notification; the contents of the MCCH information are then updated in the next modification period.

In an LTE-Advanced (LTE-Advanced, abbreviated as LTE-a) system, a Carrier Aggregation (CA) technology is introduced. In a carrier aggregation scene, a PDCCH carrying an MCCH change notification is only sent in a common search space, and a UE monitors the common search space only on a primary carrier, so that the UE cannot receive the MCCH change notification corresponding to an auxiliary carrier, cannot perform an MBMS service on the auxiliary carrier, and is not beneficial to the full utilization of spectrum resources.

Disclosure of Invention

The embodiment of the invention provides a channel change learning method, a channel change notification method and channel change notification equipment, which are used for realizing notification of MCCH change corresponding to an auxiliary carrier, so that MBMS (multimedia broadcast multicast service) services are developed on the auxiliary carrier, and the utilization rate of frequency resources is improved.

A first aspect provides a channel change learning method, including:

the user equipment decodes the downlink control channel scrambled by using the designated Radio Network Temporary Identifier (RNTI) in a designated search space based on the designated Downlink Control Information (DCI) format; wherein, the downlink control channel bears MCCH change notice;

and the user equipment acquires the MCCH change based on the MCCH change notice borne by the downlink control channel.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the specified search space is a proprietary search space.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the dedicated search space is a dedicated search space corresponding to a secondary carrier.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the specified RNTI is a cell radio network temporary identity C-RNTI.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, before the ue decodes, in a designated search space, a downlink control channel scrambled with a designated RNTI based on a designated DCI format, the method includes:

the user equipment determines the designated search space according to a multimedia broadcast multicast service radio network temporary identifier M-RNTI; or,

and the user equipment determines the designated search space according to the M-RNTI and the carrier index.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.

With reference to the fourth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the specified search space is located on a secondary carrier.

With reference to the fourth possible implementation manner of the first aspect, the fifth possible implementation manner of the first aspect, or the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the specified RNTI is the M-RNTI.

With reference to the first aspect, in an eighth possible implementation manner of the first aspect, the specified search space is a common search space.

With reference to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the assigned RNTI is a carrier specific M-RNTI, and the carrier specific M-RNTIs corresponding to different carriers are different.

With reference to the eighth possible implementation manner of the first aspect, in a tenth possible implementation manner of the first aspect, before the decoding, by the user equipment, the downlink control channel scrambled with the specified RNTI in the specified search space based on the specified DCI format, the method includes:

the user equipment receives a broadcast message sent by network side equipment, wherein the broadcast message carries information indicating sending subframes of the MCCH change notifications corresponding to each carrier, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different;

the user decodes the downlink control channel scrambled by using the designated RNTI in the designated search space based on the designated DCI format, and the method comprises the following steps:

and the user equipment determines the sending subframe of the MCCH change notification corresponding to each carrier according to the information indicating the sending subframe of the MCCH change notification corresponding to each carrier, and decodes the downlink control channel scrambled by the designated RNTI in a designated search space based on a designated DCI format on the sending subframe of the MCCH change notification corresponding to each carrier.

With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible implementation manner of the first aspect, or the sixth possible implementation manner of the first aspect, or the seventh possible implementation manner of the first aspect, or the eighth possible implementation manner of the first aspect, or the ninth possible implementation manner of the first aspect, or the tenth possible implementation manner of the first aspect, in an eleventh possible implementation manner of the first aspect, the designated DCI format includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the downlink control channel, and the second information field is used to indicate an MCCH change notification;

the user equipment learns the MCCH change based on the MCCH change notification carried by the downlink control channel, and the method comprises the following steps:

and the user equipment acquires the carrier corresponding to the downlink control channel based on the value of the first information field in the DCI format borne by the downlink control channel, and acquires the MCCH change corresponding to the carrier based on the value of the second information field in the DCI format borne by the downlink control channel.

With reference to the eleventh possible implementation manner of the first aspect, in a twelfth possible implementation manner of the first aspect, the specified DCI format is format 1C, and the first information field is a carrier indicator field CIF.

With reference to the first aspect, or the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, or the third possible implementation manner of the first aspect, or the fourth possible implementation manner of the first aspect, or the fifth possible implementation manner of the first aspect, or the sixth possible implementation manner of the first aspect, or the seventh possible implementation manner of the first aspect, or the eighth possible implementation manner of the first aspect, or the ninth possible implementation manner of the first aspect, or the tenth possible implementation manner of the first aspect, in a thirteenth possible implementation manner of the first aspect, the specified DCI format includes an MCCH change notification indication field, the MCCH change notification indication domain comprises N bits, each bit corresponds to one MCCH, when the value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

With reference to the thirteenth possible implementation manner of the first aspect, in a fourteenth possible implementation manner of the first aspect, the N MCCHs corresponding to the M carriers are numbered according to an ascending or descending order of carrier indexes, and the N bits sequentially correspond to the MCCH with the number from small to large from low to high.

A second aspect provides a channel change notification method, including:

network side equipment scrambles a downlink control channel by using a specified Radio Network Temporary Identifier (RNTI), and the downlink control channel bears an MCCH (multicast control channel) change notice;

and the network side equipment sends the scrambled downlink control channel to user equipment in a designated search space.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the specified search space is a proprietary search space.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the dedicated search space is a dedicated search space corresponding to a secondary carrier of the ue.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the specified RNTI is a cell radio network temporary identity C-RNTI.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, before the network side device specifies a search space and sends the scrambled downlink control channel to the user equipment, the method includes:

the network side equipment determines the designated search space according to the multimedia broadcast multicast service radio network temporary identifier M-RNTI of the user equipment; or,

and the network side equipment determines the designated search space according to the M-RNTI and the carrier index of the user equipment.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.

With reference to the fourth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, the specified search space is located on a secondary carrier of the user equipment.

With reference to the fourth possible implementation manner of the second aspect, the fifth possible implementation manner of the second aspect, or the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner of the second aspect, the specified RNTI is the M-RNTI.

With reference to the second aspect, in an eighth possible implementation manner of the second aspect, the specified search space is a common search space.

With reference to the eighth possible implementation manner of the second aspect, in a ninth possible implementation manner of the second aspect, the assigned RNTI is a carrier-specific M-RNTI, and the carrier-specific M-RNTIs corresponding to different carriers are different.

With reference to the eighth possible implementation manner of the second aspect, in a tenth possible implementation manner of the second aspect, before the network side device specifies a search space and sends the scrambled downlink control channel to the user equipment, the method includes:

the network side equipment sends a broadcast message to the user equipment, wherein the broadcast message carries information indicating sending subframes of the MCCH change notifications corresponding to each carrier, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different;

the sending, by the network side device, the scrambled downlink control channel to the user equipment in the designated search space includes:

and the network side equipment sends the scrambled downlink control channel to the user equipment in a designated search space on a sending subframe of the MCCH change notice corresponding to each carrier.

With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, or the third possible implementation manner of the second aspect, or the fourth possible implementation manner of the second aspect, or the fifth possible implementation manner of the second aspect, or the sixth possible implementation manner of the second aspect, or the seventh possible implementation manner of the second aspect, or the eighth possible implementation manner of the second aspect, or the ninth possible implementation manner of the second aspect, or the tenth possible implementation manner of the second aspect, in an eleventh possible implementation manner of the second aspect, a downlink control information DCI format corresponding to the downlink control channel includes a first information field and a second information field, the first information domain is used for indicating the carrier corresponding to the downlink control channel, and the second information domain user indicates the MCCH change notification.

With reference to the second aspect, or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, or the third possible implementation manner of the second aspect, or the fourth possible implementation manner of the second aspect, or the fifth possible implementation manner of the second aspect, or the sixth possible implementation manner of the second aspect, or the seventh possible implementation manner of the second aspect, or the eighth possible implementation manner of the second aspect, or the ninth possible implementation manner of the second aspect, or the tenth possible implementation manner of the second aspect, in a twelfth possible implementation manner of the second aspect, the DCI format corresponding to the downlink control channel includes an MCCH change notification indicator field, the MCCH change notification indication domain comprises N bits, each bit corresponds to one MCCH, when the value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

With reference to the twelfth possible implementation manner of the second aspect, in a thirteenth possible implementation manner of the second aspect, the N MCCHs corresponding to the M carriers are numbered according to an ascending or descending order of carrier indexes, and the N bits sequentially correspond to the MCCH with the number being from small to large from low to high.

A third aspect provides a user equipment comprising:

the decoding module is used for decoding a downlink control channel scrambled by using the appointed Radio Network Temporary Identifier (RNTI) in an appointed search space based on an appointed Downlink Control Information (DCI) format; wherein, the downlink control channel bears MCCH change notice;

and the acquisition module is used for acquiring the MCCH change based on the MCCH change notice borne by the downlink control channel.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the specified search space is a proprietary search space.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the dedicated search space is a dedicated search space corresponding to a secondary carrier.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the specified RNTI is a cell radio network temporary identity C-RNTI.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the user equipment further includes: and the determining module is used for determining the appointed search space according to the multimedia broadcast multicast service radio network temporary identifier M-RNTI or determining the appointed search space according to the M-RNTI and the carrier index before the decoding module decodes.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.

With reference to the fourth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, the specified search space is located on a secondary carrier.

With reference to the fourth possible implementation manner of the third aspect, the fifth possible implementation manner of the third aspect, or the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner of the third aspect, the specified RNTI is the M-RNTI.

With reference to the third aspect, in an eighth possible implementation manner of the third aspect, the specified search space is a common search space.

With reference to the eighth possible implementation manner of the third aspect, in a ninth possible implementation manner of the third aspect, the assigned RNTI is a carrier-specific M-RNTI, and the carrier-specific M-RNTIs corresponding to different carriers are different.

With reference to the eighth possible implementation manner of the third aspect, in a tenth possible implementation manner of the third aspect, the user equipment further includes: a receiving module, configured to receive a broadcast message sent by a network side device before the decoding module performs decoding, where the broadcast message carries information indicating a sending subframe of an MCCH change notification corresponding to each carrier, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different;

the decoding module is specifically configured to determine a transmission subframe of the MCCH change notification corresponding to each carrier according to the information indicating the transmission subframe of the MCCH change notification corresponding to each carrier, and decode the downlink control channel scrambled with the specified RNTI in a specified search space based on a specified DCI format on the transmission subframe of the MCCH change notification corresponding to each carrier.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, or the fourth possible implementation manner of the third aspect, or the fifth possible implementation manner of the third aspect, or the sixth possible implementation manner of the third aspect, or the seventh possible implementation manner of the third aspect, or the ninth possible implementation manner of the third aspect, or the tenth possible implementation manner of the third aspect, in an eleventh possible implementation manner of the third aspect, the designated DCI format includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the downlink control channel, and the second information field is used to indicate an MCCH change notification;

the obtaining module is specifically configured to obtain a carrier corresponding to the downlink control channel based on a value of a first information field in a DCI format carried by the downlink control channel, and obtain an MCCH change corresponding to the carrier based on a value of a second information field in the DCI format carried by the downlink control channel.

With reference to the eleventh possible implementation manner of the third aspect, in a twelfth possible implementation manner of the third aspect, the specified DCI format is format 1C, and the first information field is a carrier indicator field CIF.

With reference to the third aspect, or the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, or the third possible implementation manner of the third aspect, or the fourth possible implementation manner of the third aspect, or the fifth possible implementation manner of the third aspect, or the sixth possible implementation manner of the third aspect, or the seventh possible implementation manner of the third aspect, or the eighth possible implementation manner of the third aspect, or the ninth possible implementation manner of the third aspect, or the tenth possible implementation manner of the third aspect, in a thirteenth possible implementation manner of the third aspect, the specified DCI format includes an MCCH change notification indication field, the MCCH change notification indication domain comprises N bits, each bit corresponds to one MCCH, when the value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

With reference to the thirteenth possible implementation manner of the third aspect, in a fourteenth possible implementation manner of the third aspect, the N MCCHs corresponding to the M carriers are numbered according to an ascending or descending order of carrier indexes, and the N bits sequentially correspond to the MCCH with the number from small to large from low to high.

A fourth aspect provides a network side device, comprising:

the scrambling module is used for scrambling a downlink control channel by using an appointed Radio Network Temporary Identifier (RNTI), and the downlink control channel bears the MCCH change notice;

and the sending module is used for sending the scrambled downlink control channel to the user equipment in the designated search space.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the specified search space is a proprietary search space.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the dedicated search space is a dedicated search space corresponding to a secondary carrier of the ue.

With reference to the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the specified RNTI is a cell radio network temporary identity C-RNTI.

With reference to the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the network-side device further includes: a determining module, configured to determine the designated search space according to the multimedia broadcast multicast service radio network temporary identifier M-RNTI of the user equipment, or determine the designated search space according to the M-RNTI and the carrier index of the user equipment, before the sending module sends the scrambled downlink control channel.

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.

With reference to the fourth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the specified search space is located on a secondary carrier of the user equipment.

With reference to the fourth possible implementation manner of the fourth aspect, the fifth possible implementation manner of the fourth aspect, or the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, the designated RNTI is the M-RNTI.

With reference to the fourth aspect, in an eighth possible implementation manner of the fourth aspect, the specified cable space is a common search space.

With reference to the eighth possible implementation manner of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the assigned RNTI is a carrier-specific M-RNTI, and the carrier-specific M-RNTIs corresponding to different carriers are different.

With reference to the eighth possible implementation manner of the fourth aspect, in a tenth possible implementation manner of the fourth aspect, the sending module is specifically configured to send, to the user equipment, a broadcast message before sending the scrambled downlink control channel, where the broadcast message carries information indicating a sending subframe of an MCCH change notification corresponding to each carrier, where sending subframes of MCCH change notifications corresponding to at least two carriers are different, and the scrambled downlink control channel is sent to the user equipment in a designated search space on the sending subframe of the MCCH change notification corresponding to each carrier.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect or the second possible implementation manner of the fourth aspect or the third possible implementation manner of the fourth aspect or the fifth possible implementation manner of the fourth aspect or the sixth possible implementation manner of the fourth aspect or the seventh possible implementation manner of the fourth aspect or the eighth possible implementation manner of the fourth aspect or the ninth possible implementation manner of the fourth aspect or the tenth possible implementation manner of the fourth aspect, in an eleventh possible implementation manner of the fourth aspect, a downlink control information DCI format corresponding to the downlink control channel includes a first information field and a second information field, the first information domain is used for indicating the carrier corresponding to the downlink control channel, and the second information domain user indicates the MCCH change notification.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect or the second possible implementation manner of the fourth aspect or the third possible implementation manner of the fourth aspect or the fifth possible implementation manner of the fourth aspect or the sixth possible implementation manner of the fourth aspect or the seventh possible implementation manner of the fourth aspect or the eighth possible implementation manner of the fourth aspect or the ninth possible implementation manner of the fourth aspect or the tenth possible implementation manner of the fourth aspect, in a twelfth possible implementation manner of the fourth aspect, the DCI format corresponding to the downlink control channel includes an MCCH change notification indicator field, the MCCH change notification indication domain comprises N bits, each bit corresponds to one MCCH, when the value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

With reference to the twelfth possible implementation manner of the fourth aspect, in a thirteenth possible implementation manner of the fourth aspect, the N MCCHs corresponding to the M carriers are numbered according to an ascending or descending order of carrier indexes, and the N bits sequentially correspond to the MCCH with the number being from small to large from low to high.

A fifth aspect provides a user equipment comprising:

a decoder, configured to decode, in an assigned search space, a downlink control channel scrambled by using an assigned radio network temporary identifier RNTI based on an assigned downlink control information DCI format; wherein, the downlink control channel bears MCCH change notice;

a memory for storing a program;

a processor for executing the program to: and acquiring the MCCH change based on the MCCH change notice borne by the downlink control channel.

A sixth aspect provides a network side device, comprising:

a memory for storing a program;

a processor for executing the program to: scrambling a downlink control channel by using an appointed Radio Network Temporary Identifier (RNTI), wherein the downlink control channel bears an MCCH change notice;

and the communication interface is used for sending the scrambled downlink control channel to the user equipment in the designated search space.

According to the channel change learning method, the channel change notification method and the channel change notification device provided by the embodiment of the invention, the UE decodes the downlink control channel scrambled by the specified wireless network temporary identifier in the specified search space based on the specified downlink control information format, and learns the MCCH change based on the MCCH change notification carried by the downlink control channel, wherein the specified search space is not limited to the public search space any more, so that the MCCH change notification corresponding to the auxiliary carrier can be learned, and further the notification of the MCCH change corresponding to the auxiliary carrier is realized, so that the MBMS service can be carried out on the auxiliary carrier, and the utilization rate of carrier resources is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a flowchart of a channel change learning method according to an embodiment of the present invention;

FIG. 2 is a flowchart of a new arrival notification method according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another UE according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another UE according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a network-side device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another network-side device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another network-side device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a flowchart of a channel change learning method according to an embodiment of the present invention. As shown in fig. 1, the method of the present embodiment includes:

step 101, the UE decodes a Downlink Control channel scrambled by using a specified Radio Network temporary identifier (Radio Network temporary identifier, abbreviated as RNTI) in a specified search space based on a specified Downlink Control Information (DCI) format; wherein the downlink control channel carries an MCCH change notification.

102, the UE acquires the MCCH change based on the MCCH change notification carried by the downlink control channel.

The embodiment is mainly applicable to a Carrier aggregation scenario, where Carrier aggregation is also called spectrum aggregation (spectrum aggregation) or Bandwidth Extension (Bandwidth Extension), and mainly means that spectrums of two or more Component carriers (Component carriers) are aggregated together to obtain a wider transmission Bandwidth. In a carrier aggregation scenario, one of two or more aggregated component carriers is configured as a primary carrier, and the other component carriers are used as secondary carriers, that is, the UE has a primary carrier and at least one secondary carrier. It should be noted that the application scenarios of the embodiments of the present invention are not limited.

In the embodiment of the present invention, the downlink control channel includes a PDCCH or an enhanced PDCCH (enhanced PDCCH, abbreviated as E-PDCCH).

Optionally, the obtaining, by the UE, the MCCH change based on the MCCH change notification carried by the downlink control channel includes: the UE acquires the MCCH change corresponding to the main carrier based on the MCCH change notification carried by the downlink control channel; or, the UE knows the MCCH change corresponding to the secondary carrier based on the MCCH change notification carried by the downlink control channel. The MCCH change corresponding to the secondary carrier is a change of an MCCH corresponding to a Physical Multicast Channel (PMCH) on the secondary carrier.

In an alternative embodiment, the specified search Space may be a proprietary search Space (USS). Further optionally, the dedicated search space may be a dedicated search space corresponding to a secondary carrier. Based on this, the UE can acquire the MCCH change corresponding to the secondary carrier based on the MCCH change notification carried by the downlink control channel.

Those skilled in the art should understand that there are many types of RNTIs, such as Cell radio network temporary identity (Cell RNTI, abbreviated as C-RNTI), multimedia multicast service radio network temporary identity (MCCH RNTI, abbreviated as M-RNTI), etc. In different application scenarios, the assigned RNTIs used for scrambling the downlink control channel in the embodiment of the present invention may be different. For example, in an alternative embodiment, if the designated search space is a dedicated search space corresponding to a secondary carrier, the designated RNTI may be a C-RNTI.

In another optional embodiment, before the UE decodes the downlink control channel scrambled with the specified RNTI in the specified search space based on the specified DCI format, the UE includes: a step in which the UE determines the specified search space. Optionally, the UE may determine the designated search space according to the M-RNTI, or the UE may determine the designated search space according to the M-RNTI and the carrier index. The carrier index may refer to a carrier index at a system level, or the carrier index may be a cell-specific carrier index, which is the same for all users. The carrier index may also be a user-specific carrier index, i.e. a carrier index configured by a higher layer to the user equipment.

Further, in order to implement notification of MCCH change corresponding to an auxiliary carrier, the UE determines, according to the M-RNTI or according to the M-RNTI and the carrier index, that the designated search space is located on the auxiliary carrier, where the auxiliary carrier is a carrier carrying a PMCH corresponding to the MCCH. Based on this, the UE can acquire the MCCH change corresponding to the secondary carrier based on the MCCH change notification carried by the downlink control channel. It should be noted that, when the UE determines the designated search space according to the M-RNTI and the carrier index, the designated search space may also be located on the primary carrier. When the UE determines the designated search space according to the M-RNTI, if the values of the M-RNTI are not different from all the carriers, the designated search space is located on an auxiliary carrier, namely, an auxiliary carrier carrying the PMCH corresponding to the MCCH.

Further, the designated RNTI for scrambling the downlink control channel may be an M-RNTI used by the UE to determine the designated search space.

In yet another alternative embodiment, the specified search Space may also be a common search Space (CSS for short). In the LTE system, only the primary carrier generally has the common search space, so in this embodiment, the specified search space mainly refers to the common search space corresponding to the primary carrier. In this embodiment, since the downlink control channels carrying the MCCH change notifications corresponding to each carrier are all transmitted in the common search space, it is necessary to distinguish the MCCH change notifications corresponding to different carriers by other information.

An optional way to distinguish the MCCH change notifications corresponding to different carriers is: the different carriers are distinguished through the assigned RNTI, for example, carrier-specific M-RNTI can be respectively configured for the different carriers, and the carrier-specific M-RNTI can uniquely identify one carrier, namely the carrier-specific M-RNTIs corresponding to the different carriers are different; based on this, the designated RNTI is a carrier-specific M-RNTI.

Another alternative way to distinguish the MCCH change notifications corresponding to different carriers is: the MCCH change notification sending subframes corresponding to the carriers are used for distinguishing, and the MCCH change notification sending subframes corresponding to different carriers are different. For example, the network side device may send a broadcast message to the UE, where the broadcast message carries information indicating a sending subframe of the MCCH change notification corresponding to each carrier, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different. Based on this, the UE decodes the downlink control channel scrambled by the specified RNTI in the specified search space based on the specified DCI format, including: and the UE determines the sending sub-frame of the MCCH change notification corresponding to each carrier according to the information of the sending sub-frame indicating the MCCH change notification corresponding to each carrier, and decodes the downlink control channel scrambled by the appointed RNTI in the appointed search space based on the appointed DCI format on the sending sub-frame of the MCCH change notification corresponding to each carrier, so that the UE can distinguish the MCCH change notifications corresponding to different carriers through different sending sub-frames.

Another optional way for distinguishing the MCCH change notifications corresponding to different carriers is: distinguished by a specified information field in the specified DCI format. An optional implementation manner of distinguishing the MCCH change notification corresponding to different carriers by specifying the information field in the specified DCI format includes: the designated DCI format comprises a first information domain and a second information domain, wherein the first information domain is used for indicating a carrier wave corresponding to a downlink control channel, and the second information domain is used for indicating an MCCH change notification; thus, the UE can know which carrier the MCCH change notification carried by the downlink control channel corresponds to from the specified DCI format. Based on this, the UE learns the MCCH change based on the MCCH change notification carried by the downlink control channel, including: the UE acquires a carrier corresponding to the downlink control channel based on the value of a first information domain in a DCI format borne by the downlink control channel, and acquires the MCCH change corresponding to the carrier based on the value of a second information domain in the DCI format borne by the downlink control channel. Optionally, the designated DCI format may be format 1C, and the first information Field is a Carrier Indicator Field (CIF).

Another optional implementation manner of distinguishing the MCCH change notification corresponding to different carriers by specifying the information field in the specified DCI format includes: the designated DCI format comprises an MCCH change notification indication domain, wherein the MCCH change notification indication domain comprises N bit positions, each bit position corresponds to one MCCH, and when the value of the bit position is 1, the MCCH corresponding to the bit position is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

Optionally, N MCCH corresponding to the M carriers are numbered according to an increasing or decreasing order of carrier indexes, and the MCCH with the number being gradually increased corresponds to the MCCH with the number being gradually increased in the N bits from the lower bit to the higher bit. When one carrier corresponds to X MCCH, X MCCH corresponding to the carrier may be sorted first, then MCCH corresponding to M carriers are sorted according to the ascending or descending order of carrier index, and finally numbered uniformly. Based on this, the UE can determine which MCCH corresponds to which carrier is changed by the position of the bit with the value of 1 in the N bits. In addition to this method, a mapping relationship between each bit and the MCCH corresponding to each carrier may be preset, and the UE may determine which MCCH corresponds to which carrier is changed based on the mapping relationship and the bit with the value of 1 in the MCCH change notification indicator field.

It should be noted that, after knowing that the MCCH corresponding to the carrier is changed, the UE may acquire the updated MCCH corresponding to the PMCH on the carrier in the next modification period.

In this embodiment, the UE decodes the downlink control channel scrambled by using the specified RNTI based on the specified DCI format in the specified search space, and learns the MCCH change based on the MCCH change notification carried by the downlink control channel, where the specified search space is no longer limited to the common search space, so that the MCCH change notification corresponding to the auxiliary carrier can be learned, and further the notification of the change of the MCCH corresponding to the auxiliary carrier is implemented, so that the MBMS service can be performed on the auxiliary carrier, and further the utilization rate of the carrier resource is improved.

In the following optional embodiments, taking some optional embodiments as examples to further describe the technical solution of the present invention in detail, in the following optional embodiments, an example of knowing the MCCH change corresponding to the first secondary carrier is but not limited to knowing the MCCH change corresponding to the first secondary carrier, and the downlink control channel is represented by a PDCCH or an E-PDCCH. Here, the first secondary carrier may refer to any one of secondary carriers of the UE.

In an optional embodiment, the designated search space is a dedicated search space corresponding to the first secondary carrier, that is, a downlink control channel corresponding to the first secondary carrier is detected in the dedicated search space; the designated RNTI may be a C-RNTI.

Based on this, the process of acquiring the MCCH change by the UE includes: the UE decodes a PDCCH or an E-PDCCH scrambled by using a C-RNTI (Cyclic Redundancy Check, CRC for short) in a special search space corresponding to the first auxiliary carrier based on the designated DCI format; and the UE acquires the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or the E-PDCCH.

For the UE, the dedicated search space of the first secondary carrier and the C-RNTI used for scrambling are both agreed with the network side device in advance and are configured in advance. Specifically, the UE detects a PDCCH or an E-PDCCH scrambled by using a C-RNTI and having a DCI format of 1C in a dedicated search space corresponding to the first auxiliary carrier on the specific subframe, and obtains MCCH change according to 8-bit information used for indicating an MCCH change notification in the DCI format 1C, where the MCCH is a MCCH corresponding to a PMCH on the first auxiliary carrier. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, the load size (payload size) corresponding to the DCI format corresponding to the downlink control channel may be aligned with DCI format 0 or DCI format 4, and a specific alignment manner may be to add 0 bit. For example, in addition to the indication that 8-bit is used for MCCH change notification in the DCI format corresponding to the downlink control channel, 0 bit is added so that the load size corresponding to the DCI is the same as the load size of DCI format 0 or DCI format 4. Wherein, DCI format 0 or DCI format 4 corresponds to the same secondary carrier as the DCI format corresponding to the downlink control channel. Therefore, the load size of the DCI format corresponding to the downlink control channel is aligned with DCI format 0 or DCI format 4, so the number of blind detections of the PDCCH or E-PDCCH corresponding to the UE on the first secondary carrier is not increased.

It is to be noted that whether or not the DCI format corresponding to the downlink control channel is aligned with DCI format 0 or DCI format 4, the number of 0 bits to be added at the time of alignment, and the like may be arranged in advance in the UE and the network side device.

In another optional embodiment, the designated search space is a dedicated search space corresponding to the first secondary carrier, that is, a downlink control channel carrying the MCCH change notification corresponding to the first secondary carrier is detected in the dedicated search space; the designated RNTI can be M-RNTI.

Based on this, the process of acquiring the MCCH change by the UE includes: the UE decodes the PDCCH or the E-PDCCH scrambled by the CRC through the M-RNTI in a special search space corresponding to the first auxiliary carrier based on the designated DCI format; and the UE acquires the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or the E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

For the UE, the dedicated search space of the first secondary carrier and the M-RNTI used for scrambling are both agreed with the network side device in advance and are configured in advance. Specifically, the UE detects a PDCCH or an E-PDCCH scrambled by using M-RNTI and having a DCI format 1C in a dedicated search space corresponding to the first auxiliary carrier on the specific subframe, and obtains MCCH change according to 8-bit information used for indicating an MCCH change notification in the DCI format 1C, where the MCCH is a MCCH corresponding to a PMCH on the first auxiliary carrier.

In yet another optional embodiment, the designated RNTI may be an M-RNTI corresponding to the first auxiliary carrier; the designated search space is determined according to the M-RNTI or the M-RNTI and the carrier index of the first auxiliary carrier.

Based on this, the process of acquiring the MCCH change by the UE includes: the UE firstly determines the designated search space according to the M-RNTI corresponding to the first auxiliary carrier or the M-RNTI and the carrier index of the first auxiliary carrier; then, decoding the PDCCH or the E-PDCCH scrambled by the CRC of the M-RNTI in the designated search space based on the designated DCI format; and the UE acquires the MCCH change based on the MCCH change notification carried by the PDCCH or the E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, the UE may specifically determine the designated search space for the first auxiliary carrier according to the M-RNTI corresponding to the first auxiliary carrier and the carrier index of the first auxiliary carrier. Or, the UE may also determine the designated search space for the first auxiliary carrier according to the M-RNTI corresponding to the first auxiliary carrier. The carrier index may refer to a carrier index at a system level, or the carrier index may refer to a cell-specific carrier index, which is the same for all users. The carrier index may also be a user-specific carrier index, i.e. a carrier index configured by a higher layer to the user equipment.

After the designated search space is determined, the UE detects a PDCCH or an E-PDCCH which is scrambled by using an M-RNTI and has a DCI format 1C in the designated search space, and acquires MCCH change according to 8-bit information used for indicating an MCCH change notification in the DCI format 1C, wherein the MCCH is an MCCH corresponding to a PMCH on a first auxiliary carrier.

In yet another alternative embodiment, the designated search space may be a common search space, that is, the MCCH change notification of the first secondary carrier is sent in the common search space, and for the CA user, only the primary carrier usually has the common search space; the designated RNTI is a carrier-specific M-RNTI, which in this embodiment mainly refers to a carrier-specific M-RNTI of the first auxiliary carrier, where carrier-specific M-RNTIs of different carriers are different.

Based on this, the process of acquiring the MCCH change by the UE includes: the UE decodes the PDCCH or the E-PDCCH scrambled by using the carrier-specific RNTI of the first auxiliary carrier in the public search space based on the designated DCI format; and the UE acquires the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or the E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

Because the PDCCH or E-PDCCH corresponding to different carriers uses the carrier-specific RNTI corresponding to the carrier to carry out scrambling, the MCCH change notifications of all the carriers can be sent in the common search space corresponding to the main carrier, namely the MCCH change notifications corresponding to the auxiliary carriers can also be sent in the common search space corresponding to the main carrier, thereby solving the problem of receiving the MCCH change notifications on the auxiliary carriers.

For the UE, the common search space of the primary carrier and the carrier-specific RNTI corresponding to the first secondary carrier used for scrambling are both agreed with the network side device in advance and are configured in advance. Specifically, the UE detects a PDCCH or E-PDCCH scrambled with a carrier-specific RNTI of the first auxiliary carrier and having a DCI format of format 1C in a common search space corresponding to the main carrier on the specific subframe, and obtains MCCH change according to 8-bit information used to indicate an MCCH change notification in the DCI format 1C, where the MCCH is a MCCH corresponding to a PMCH on the first auxiliary carrier.

In yet another alternative embodiment, the designated search space is a common search space; the appointed RNTI is M-RNTI; in this embodiment, the MCCH change notifications corresponding to different carriers are distinguished by the specific information field in the specific DCI format. The designated DCI format comprises a first information domain and a second information domain, wherein the first information domain is used for indicating a carrier corresponding to the PDCCH or the E-PDCCH; the second information field is used for indicating MCCH change notification.

Based on this, the process of knowing the MCCH change includes: the UE decodes the PDCCH or the E-PDCCH scrambled by the CRC of the M-RNTI in the public search space based on the designated DCI format; the UE acquires a first auxiliary carrier corresponding to the PDCCH or the E-PDCCH based on a value of a first information domain in a DCI format borne by the PDCCH or the E-PDCCH, and acquires MCCH change corresponding to the first auxiliary carrier based on a value of a second information domain in the DCI format borne by the PDCCH or the E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, the M-RNTI is used for CRC scrambling of a PDCCH or EPDCCH carrying an MCCH change notification, and the M-RNTIs corresponding to all the secondary carriers may be the same or different.

In this embodiment, the first information field included in the DCI format may be a CIF, and the CIF may be composed of 3-bits and is mainly used for carrying a carrier corresponding to a PDCCH or an E-PDCCH. For example, when the DCI format is format 1C, the format 1C may include the following fields: and the 8-bit second information domain is used for carrying the MCCH change notice, the 3-bit CIF and the reserved bit domain. Wherein, whether the reserved bit field exists depends on whether the DCI format 1C needs to add 0 bit to be aligned with a load size (payload size) when the DCI format 1C is used for single PDSCH scheduling. The alignment means that the load size of the DCI format 1C when used for indicating the MCCH change notification corresponding to the carrier is the same as the load size when used for single PDSCH scheduling. The DCI format includes a reserved bit field if a pull-up is required, and may not include a reserved bit field if a pull-up is not required.

Note that, the first information field in this embodiment may reuse the reserved bit field in DCI format 1C.

In yet another alternative embodiment, the specified cable space may be a common search space; the appointed RNTI can be M-RNTI; in this embodiment, the MCCH change notifications corresponding to different carriers are distinguished by the transmission subframe of the MCCH change notification.

Based on this, the process of acquiring the MCCH change by the UE includes: the method comprises the steps that UE receives broadcast messages of network side equipment, and determines sending subframes of MCCH change notifications corresponding to carriers according to the broadcast messages; the broadcast message in this step may be SIB 13. Specifically, the network side device notifies the UE of information of the transmission subframes of the MCCH change notifications corresponding to each carrier through the SIB13, where the transmission subframes of the MCCH change notifications corresponding to different carriers are not consistent. Then, the UE decodes the PDCCH or the E-PDCCH scrambled by the CRC of the M-RNTI in the public search space on the sending subframe of the MCCH change notice corresponding to the determined first auxiliary carrier based on the designated DCI format; and the UE acquires the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or the E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, the M-RNTI is used for CRC scrambling of a PDCCH or EPDCCH carrying an MCCH change notification, and the M-RNTIs corresponding to all carriers may be the same or different.

In this embodiment, the UE determines, according to the subframe in which the MCCH change notification is detected, the first secondary carrier corresponding to the MCCH change notification.

In yet another alternative embodiment, the specified search space may be a common search space; the designated RNTI can be M-RNTI; in this embodiment, the MCCH change notification corresponding to different carriers is distinguished by specifying the specified information field in the DCI format.

Based on this, the process of acquiring the MCCH change by the UE includes: the UE decodes the PDCCH or the E-PDCCH scrambled by the CRC of the M-RNTI in the public search space based on the designated DCI format; and the UE acquires the MCCH change corresponding to the first auxiliary carrier according to the value of the MCCH change notification indication domain in the DCI format borne by the PDCCH or the E-PDCCH. The MCCH change notification indication domain comprises N bits, each bit corresponds to one MCCH, when the value of the bit is 1, the MCCH corresponding to the bit is changed, the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, N is an integer greater than or equal to 2, and M is also an integer greater than or equal to 2. In this embodiment, whether or not the MCCH corresponding to each carrier is changed is mainly indicated in the form of a bitmap (bitmap). It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

Optionally, the MCCH corresponding to the M carriers may be numbered uniformly, for example, the MCCH corresponding to the M carriers may be numbered sequentially according to an increasing or decreasing order of the carrier index, for example, the MCCH corresponding to the carrier with a low carrier index may be numbered first, and then the MCCH corresponding to the carrier with a high carrier index may be numbered, and the MCCH with a small number may be sequentially numbered from a low bit to a high bit in the N bits. When one carrier corresponds to X MCCH, X MCCH corresponding to the carrier may be sorted first, then MCCH corresponding to M carriers are sorted according to the ascending or descending order of carrier index, and finally numbered uniformly. Based on this, the UE can determine which MCCH corresponds to which carrier is changed by the position of the bit with the value of 1 in the N bits.

In addition to the above manner, a mapping relationship between N bits and the MCCH corresponding to the carrier may be generated in advance, and the MCCH corresponding to a certain bit and the carrier corresponding to the MCCH may be determined according to the mapping relationship.

The embodiments distinguish the MCCH change notifications corresponding to different carriers in various ways, so that the MCCH change notification corresponding to an auxiliary carrier can be identified, and the notification of the MCCH change corresponding to the auxiliary carrier is realized, so that the MBMS service can be performed on the auxiliary carrier, and the utilization rate of carrier resources is further improved.

Fig. 2 is a flowchart of a new arrival notification method according to an embodiment of the present invention. As shown in fig. 2, the method of the present embodiment includes:

step 201, the network side device scrambles a downlink control channel by using the designated RNTI, and the downlink control channel carries the MCCH change notification.

Step 202, the network side device sends the scrambled downlink control channel to the UE in the designated search space.

The present embodiment is also mainly applicable to a carrier aggregation scenario, which is described from the description of the network side device. It should be noted that the application scenarios of the embodiments of the present invention are not limited. The network side device of this embodiment may be a base station, but is not limited thereto.

In this embodiment, the downlink control channel includes a PDCCH or an E-PDCCH.

Optionally, the MCCH change notification carried by the downlink control channel may be an MCCH change notification corresponding to a primary carrier, or an MCCH change notification corresponding to an auxiliary carrier. And the MCCH change notification corresponding to the auxiliary carrier is mainly used for indicating that the MCCH corresponding to the PMCH on the auxiliary carrier is changed.

In an alternative embodiment, the specified search space may be a proprietary search space. Further optionally, the dedicated search space may be a dedicated search space corresponding to a secondary carrier of the UE. Based on this, the MCCH change notification carried by the downlink control channel is used to indicate that the MCCH corresponding to the secondary carrier is changed.

One skilled in the art will appreciate that there are various RNTIs, such as C-RNTI, M-RNTI, and the like. In different application scenarios, the assigned RNTIs used for scrambling the downlink control channel in the embodiment of the present invention may be different. For example, in an optional embodiment, if the designated search space is a dedicated search space corresponding to a secondary carrier of the UE, the designated RNTI may be a C-RNTI.

In another optional embodiment, before the network side device specifies the search space and sends the scrambled downlink control channel to the UE, the method includes: and the network side equipment determines the specified search space. Optionally, the network side device may determine the designated search space according to the M-RNTI of the UE, or the network side device may determine the designated search space according to the M-RNTI of the UE and the carrier index. The carrier index may refer to a system-level carrier index, or may be a cell-specific carrier index, where the cell-specific carrier index is the same for the user. The carrier index may also be a user-specific carrier index, i.e. a carrier index configured by a higher layer to the user equipment.

Further, in order to implement notification of MCCH change corresponding to an auxiliary carrier, the network side device determines, according to the M-RNTI of the UE or according to the M-RNTI and the carrier index of the UE, that the designated search space is located on the auxiliary carrier of the UE, where the auxiliary carrier is a carrier carrying a PMCH corresponding to the MCCH. Based on this, the MCCH change notification carried by the downlink control channel is mainly used to indicate the MCCH change corresponding to the secondary carrier. It should be noted that, when the network side device determines the designated search space according to the M-RNTI and the carrier index, the designated search space may also be located on the primary carrier. When the network side equipment determines the designated search space according to the M-RNTI, if the values of the M-RNTI are not different from all the carriers, the designated search space is located on an auxiliary carrier, namely, an auxiliary carrier carrying the PMCH corresponding to the MCCH.

Further, the designated RNTI for scrambling the downlink control channel may be an M-RNTI used by the network side device to determine the designated search space.

In yet another alternative embodiment, the specified search space may also be a common search space. In the LTE system, only the primary carrier generally has the common search space, so in this embodiment, the specified search space mainly refers to the common search space corresponding to the primary carrier. In this embodiment, since the downlink control channels carrying the MCCH change notifications corresponding to each carrier are all transmitted in the common search space, it is necessary to distinguish the MCCH change notifications corresponding to different carriers by other information.

Another alternative way to distinguish the MCCH change notifications corresponding to different carriers is: the MCCH change notification sending subframes corresponding to the carriers are used for distinguishing, and the MCCH change notification sending subframes corresponding to different carriers are different. For example, the network side device may send a broadcast message to the UE before sending the scrambled downlink control channel to the UE in the designated search space, where the broadcast message carries information indicating a sending subframe of an MCCH change notification corresponding to each carrier, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different; and then, the network side equipment sends the scrambled downlink control channel to the UE in the designated search space on the sending subframe of the MCCH change notice corresponding to each carrier. For the description of the UE side, reference may be made to the above embodiments. In the embodiment, the MCCH change notifications corresponding to different carriers are distinguished by different transmission subframes.

Another optional way for distinguishing the MCCH change notifications corresponding to different carriers is: distinguished by a specified information field in the specified DCI format. An optional implementation manner of distinguishing the MCCH change notification corresponding to different carriers by specifying the information field in the specified DCI format includes: the designated DCI format comprises a first information domain and a second information domain, wherein the first information domain is used for indicating a carrier wave corresponding to a downlink control channel, and the second information domain is used for indicating an MCCH change notification; thus, the UE can know which carrier the MCCH change notification carried by the downlink control channel corresponds to from the specified DCI format. Specifically, the network side device may indicate a carrier corresponding to the downlink control channel by setting a value of a first information field in a DCI format carried on the basis of the downlink control channel, and indicate MCCH change corresponding to the carrier by setting a value of a second information field in the DCI format carried on the basis of the downlink control channel. Optionally, the designated DCI format may be format 1C, and the first information field is a CIF.

Optionally, N MCCH corresponding to the M carriers are numbered according to an increasing or decreasing order of carrier indexes, and the MCCH with the number being gradually increased corresponds to the MCCH with the number being gradually increased in the N bits from the lower bit to the higher bit. When one carrier corresponds to X MCCH, X MCCH corresponding to the carrier may be sorted first, then MCCH corresponding to M carriers are sorted according to the ascending or descending order of carrier index, and finally numbered uniformly. Based on this, the network side device may indicate that a certain MCCH corresponding to the corresponding carrier is changed by setting a value of a certain bit or bits in the MCCH change notification field to 1. In addition to this manner, a mapping relationship between each bit and the MCCH corresponding to each carrier may also be preset, and the network side device may set a bit with a value of 1 for one or some bits in the MCCH change notification indication field based on the mapping relationship to indicate that a certain MCCH corresponding to the corresponding carrier is changed.

In this embodiment, the network side device scrambles the downlink control channel by using the designated RNTI, and then sends the scrambled downlink control channel to the UE in the designated search space, so that the UE can decode the scrambled downlink control channel based on the designated DCI format, and further knows the MCCH change based on the MCCH change notification carried by the downlink control channel, wherein the designated search space is no longer limited to the common search space, and therefore can notify the UE of the MCCH change corresponding to the auxiliary carrier, thereby implementing the notification of the MCCH change corresponding to the auxiliary carrier, so that the MBMS service can be carried out on the auxiliary carrier, and further improving the utilization rate of carrier resources.

In the following optional embodiments, an example of notifying that the MCCH corresponding to the first secondary carrier is changed is provided, but not limited to knowing that the MCCH corresponding to the first secondary carrier is changed, and the downlink control channel is represented by a PDCCH or an E-PDCCH. Here, the first secondary carrier may refer to any one of secondary carriers of the UE.

Based on this, the process of notifying the MCCH change by the network side device includes: the network side equipment carries out CRC scrambling on the PDCCH or the E-PDCCH by utilizing the C-RNTI of the first auxiliary carrier, and the PDCCH or the E-PDCCH bears the MCCH change notice; the network side equipment sends the scrambled PDCCH or E-PDCCH to the UE in the special search space corresponding to the first auxiliary carrier, so that the UE can decode the scrambled PDCCH or E-PDCCH through the special search space corresponding to the first auxiliary carrier based on the designated DCI format, and further know the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or the E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, when the network side device needs to change the MCCH in the next modification period, the MCCH change notification is sent to all UEs receiving the PMCH corresponding to the MCCH through the PDCCH or the E-PDCCH in the current modification period. For the network side device, the dedicated search space of the first secondary carrier and the C-RNTI used for scrambling are both agreed with the UE in advance and are configured in advance.

In this embodiment, the dedicated search space corresponding to the first auxiliary carrier is a dedicated search space corresponding to a carrier that carries a PMCH service corresponding to the MCCH, where the carrier is the first auxiliary carrier for all UEs that receive the PMCH.

In this embodiment, the load size (payload size) corresponding to the DCI format corresponding to the downlink control channel may be aligned with DCI format 0 or DCI format 4, and a specific alignment manner may be to add 0 bit. For example, in a DCI format corresponding to a downlink control channel, except for indication information that 8-bit is used for MCCH change notification, 0 bit is added so that the load size corresponding to the DCI is the same as the load size of DCI format 0 or DCI format 4. Wherein, DCI format 0 or DCI format 4 corresponds to the same secondary carrier as the DCI format corresponding to the downlink control channel. Therefore, the load size of the DCI format corresponding to the downlink control channel is aligned with DCI format 0 or DCI format 4, so the number of blind detections of the PDCCH or E-PDCCH corresponding to the UE on the first secondary carrier may not be increased.

In another optional embodiment, the designated search space is a dedicated search space corresponding to the first secondary carrier, that is, a downlink control channel corresponding to the first secondary carrier is detected in the dedicated search space; the designated RNTI can be M-RNTI.

Based on this, the process of notifying the MCCH change by the network side device includes: the network side equipment carries out CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI of the first auxiliary carrier, and the PDCCH or the E-PDCCH bears the MCCH change notification; the network side equipment sends the scrambled PDCCH or E-PDCCH to the UE in the special search space corresponding to the first auxiliary carrier, so that the UE can decode the scrambled PDCCH or E-PDCCH through the special search space corresponding to the first auxiliary carrier based on the designated DCI format, and further know the MCCH change corresponding to the first auxiliary carrier based on the DCCH change notification carried by the PDCCH or E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, when the network side device needs to change the MCCH in the next modification period, the MCCH change notification is sent to all UEs receiving the PMCH corresponding to the MCCH through the PDCCH or the E-PDCCH in the current modification period. For the network side device, the dedicated search space of the first secondary carrier and the M-RNTI used for scrambling are both agreed with the UE in advance and are configured in advance.

In this embodiment, the M-RNTI may be shared by a group of UEs that all receive the PMCH on the first secondary carrier. If the dedicated search spaces corresponding to the first auxiliary carrier of the group of UEs overlap, the network side device preferably sends a PDCCH or an E-PDCCH to the group of UEs at the overlapping portion in the dedicated search space corresponding to the first auxiliary carrier of the group of UEs, so that the network side device can send only one PDCCH or E-PDCCH, thereby saving PDCCH or E-PDCCH resources.

Based on this, the process of notifying the MCCH change by the network side device includes: the network side equipment carries out CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI of the first auxiliary carrier, and the PDCCH or the E-PDCCH bears the MCCH change notification; the network side equipment determines the designated search space based on the M-RNTI corresponding to the first auxiliary carrier or according to the M-RNTI corresponding to the first auxiliary carrier and the carrier index of the first auxiliary carrier; and then, the network side equipment sends the scrambled PDCCH or E-PDCCH to the UE in the designated search space, so that the UE can decode the scrambled PDCCH or E-PDCCH in the designated search space determined by the M-RNTI based on the designated DCI format, and further know the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or the E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

The sequence between the processes of the network side device determining the designated search space based on the M-RNTI corresponding to the first auxiliary carrier or the carrier index of the M-RNTI and the first auxiliary carrier is not limited.

In this embodiment, when the network side device needs to change the MCCH in the next modification period, the MCCH change notification is sent to all UEs receiving the PMCH corresponding to the MCCH through the PDCCH or the E-PDCCH in the current modification period. For the network side equipment, the M-RNTI used for scrambling is agreed with the UE in advance and is configured in advance.

In this embodiment, the network side device may determine the designated search space for the first auxiliary carrier according to the M-RNTI corresponding to the first auxiliary carrier and the carrier index of the first auxiliary carrier. Or, the network side device may also determine the designated search space for the first auxiliary carrier according to the M-RNTI corresponding to the first auxiliary carrier. The carrier index may refer to a carrier index at a system level, or the carrier index may refer to a cell-specific carrier index, which is the same for all users. The carrier index may also be a user-specific carrier index, i.e. a carrier index configured by a higher layer to the user equipment.

In this embodiment, if all UEs receiving the PMCH on the first secondary carrier acquire the MCCH change notification in the designated search space, the network side device may send only one MCCH change notification for a plurality of UEs, thereby saving PDCCH or E-PDCCH resources.

Based on this, the process of notifying the MCCH change by the network side device includes: the network side equipment carries out CRC scrambling on the PDCCH or the E-PDCCH by using the carrier special RNTI of the first auxiliary carrier, and the PDCCH or the E-PDCCH bears the MCCH change notice; the network side equipment sends the scrambled PDCCH or E-PDCCH to the UE in the public search space, so that the UE can decode the scrambled PDCCH or E-PDCCH in the public search space based on the designated DCI format, and further knows the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, when the network side device needs to change the MCCH in the next modification period, the MCCH change notification is sent to all UEs receiving the PMCH corresponding to the MCCH through the PDCCH or the E-PDCCH in the current modification period. For the network side device, the common search space and the carrier-specific RNTI of the first auxiliary carrier used for scrambling are both agreed with the UE in advance and are configured in advance.

In this embodiment, the network side device needs to scramble the carrier-specific RNTIs of all configured first secondary carriers in the common search space corresponding to the primary carrier, and this operation may be performed in a specific subframe.

In this embodiment, for the MCCH change notification corresponding to the first auxiliary carrier, the network side device needs to send the MCCH change notification on the primary carriers of all UEs that receive the PMCH corresponding to the MCCH, that is, the network side device needs to send the MCCH change notification to each UE via each primary carrier of the UE that receives the PMCH corresponding to the MCCH.

Here, the MCCH change notification may be transmitted in a non-MBSFN subframe of the primary carrier.

In yet another alternative embodiment, the designated search space is a common search space; the appointed RNTI is M-RNTI; in this embodiment, the MCCH change notifications corresponding to different carriers are distinguished by specifying an information field in the specified DCI format. The designated DCI format comprises a first information domain and a second information domain, wherein the first information domain is used for indicating a carrier corresponding to the PDCCH or the E-PDCCH; the second information field is used for indicating MCCH change notification.

Based on this, the process of notifying the MCCH change by the network side device includes: the network side equipment carries out CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI, and the PDCCH or the E-PDCCH bears the MCCH change notice; the network side equipment sends the scrambled PDCCH or E-PDCCH to the UE in the public search space, so that the UE can decode the scrambled PDCCH or E-PDCCH in the public search space based on the designated DCI format, and further knows the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, the network side device indicates the first secondary carrier corresponding to the PDCCH or the E-PDCCH by setting a value of a first information field in a DCI format carried on the basis of the PDCCH or the E-PDCCH, and indicates the MCCH change notification by setting a value of a second information field in a DCI format carried on the basis of the PDCCH or the E-PDCCH.

Optionally, the first information field may be a CIF. For example, when the DCI format is format 1C, the format 1C may include the following fields: and the 8-bit second information domain is used for indicating the MCCH change notice, the 3-bit CIF and the reserved bit domain. Wherein, whether the reserved bit field exists depends on whether the DCI format 1C needs to add 0 bit to be aligned with a load size (payload size) when the DCI format 1C is used for single PDSCH scheduling. The alignment means that the load size of the DCI format 1C when used for indicating the MCCH change notification corresponding to the carrier is the same as the load size when used for single PDSCH scheduling. The DCI format includes a reserved bit field if a pull-up is required, and may not include a reserved bit field if a pull-up is not required.

Based on this, the process of notifying the MCCH change by the network side device includes: and the network side equipment sends a broadcast message to the UE, wherein the broadcast message carries information indicating sending subframes of the MCCH change notifications corresponding to the carriers, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different. Then, the network side equipment carries out CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI, and the PDCCH or the E-PDCCH bears the MCCH change notice; then, the network side equipment sends the scrambled PDCCH or E-PDCCH to the UE in a public search space on a sending subframe of the MCCH change notification corresponding to the first auxiliary carrier, so that the UE can decode the scrambled PDCCH or E-PDCCH in the public search space on the sending subframe of the MCCH change notification corresponding to the first auxiliary carrier, and further know the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH.

In this embodiment, the broadcast message may be a SIB 13. Specifically, the network side device may notify the UE of information of the transmission subframe of the MCCH change notification corresponding to each secondary carrier through the SIB 13.

In yet another alternative embodiment, the specified search space may be a common search space; the designated RNTI can be M-RNTI; in this embodiment, the MCCH change notification corresponding to different carriers is distinguished by the specific information field in the specific DCI format.

Based on this, the process of notifying the MCCH change by the network side device includes: the network side equipment carries out CRC scrambling on the PDCCH or the E-PDCCH by using the M-RNTI corresponding to the first auxiliary carrier, and the PDCCH or the E-PDCCH bears the MCCH change notification; and then, the network side equipment sends the scrambled PDCCH or E-PDCCH to the UE in the public search space, so that the UE can decode the scrambled PDCCH or E-PDCCH by using the M-RNTI in the public search space based on the specified DCI format, and further knows the MCCH change corresponding to the first auxiliary carrier based on the MCCH change notification carried by the PDCCH or the E-PDCCH. It should be noted that the first secondary carrier may refer to a secondary carrier that carries a PMCH corresponding to the MCCH. In this embodiment, the DCI format carried on the PDCCH or E-PDCCH includes an MCCH change notification indicator field. The MCCH change notification indication domain comprises N bits, each bit corresponds to one MCCH, when the value of the bit is 1, the MCCH corresponding to the bit is changed, the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, N is an integer greater than or equal to 2, and M is also an integer greater than or equal to 2. In this embodiment, whether or not the MCCH corresponding to each carrier is changed is mainly indicated in the form of a bitmap (bitmap).

Optionally, the MCCH corresponding to the M carriers may be numbered uniformly, for example, the MCCH corresponding to the M carriers may be numbered sequentially according to an increasing or decreasing order of the carrier index, for example, the MCCH corresponding to the carrier with a low carrier index may be numbered first, and then the MCCH corresponding to the carrier with a high carrier index may be numbered, and the MCCH with a small number may be sequentially numbered from a low bit to a high bit in the N bits. When one carrier corresponds to X MCCH, X MCCH corresponding to the carrier may be sorted first, then MCCH corresponding to M carriers are sorted according to the ascending or descending order of carrier index, and finally numbered uniformly. Based on this, the network side device may identify that a certain MCCH corresponding to a certain carrier is changed by the position of the bit with the value of 1 in the N bits.

In the embodiments, the MCCH corresponding to different carriers is distinguished in various ways, and the notification is changed, so that the MCCH change notification corresponding to the auxiliary carrier can be identified, and the notification of the MCCH change corresponding to the auxiliary carrier is realized, so that the MBMS service can be performed on the auxiliary carrier, and the utilization rate of carrier resources is further improved.

Fig. 3 is a schematic structural diagram of a UE according to an embodiment of the present invention. As shown in fig. 3, the UE includes: a decoding module 31 and an acquisition module 32.

A decoding module 31, configured to decode, in an assigned search space, a downlink control channel scrambled by an assigned RNTI based on an assigned DCI format; wherein the downlink control channel carries an MCCH change notification. Optionally, the downlink control channel includes a PDCCH or an E-PDCCH.

And an obtaining module 32 connected to the decoding module 31, configured to obtain an MCCH change based on the MCCH change notification carried by the downlink control channel.

In an alternative embodiment, the specified search space is a proprietary search space. Further, the dedicated search space is a dedicated search space corresponding to the secondary carrier. Based on this, the designated RNTI is C-RNTI.

In an optional embodiment, as shown in fig. 4, the UE further includes: a determination module 33.

A determining module 33, configured to determine the designated search space according to the M-RNTI or determine the designated search space according to the M-RNTI and the carrier index before the decoding module 31 performs decoding. The determining module 33 is connected to the decoding module 31 for providing the specified search space to the decoding module 31.

Optionally, the carrier index may refer to a carrier index at a system level, or the carrier index may be a cell-specific carrier index, and the cell-specific carrier index is the same for all users. The carrier index may also be a user-specific carrier index, i.e. a carrier index configured by a higher layer to the user equipment. Optionally, the designated search space is located on an auxiliary carrier, and the auxiliary carrier is a carrier for carrying a PMCH corresponding to the MCCH. It should be noted that, when the determining module 33 in the UE determines the designated search space according to the M-RNTI and the carrier index, the designated search space may also be located on the primary carrier. When the determining module 33 in the UE determines the designated search space according to the M-RNTI, if the values of the M-RNTI are not different for all carriers, the designated search space is located on an auxiliary carrier, that is, on an auxiliary carrier carrying the PMCH corresponding to the MCCH. Optionally, the designated RNTI is the M-RNTI.

In an alternative embodiment, the specified search space is a common search space. In order to distinguish the MCCH change notifications corresponding to different carriers, the assigned RNTI is a carrier-specific M-RNTI, and the carrier-specific M-RNTIs corresponding to different carriers are different.

In an alternative embodiment, the specified search space is a common search space. In order to distinguish the MCCH change notifications corresponding to different carriers, the MCCH change notifications corresponding to different carriers are set to have different transmission subframes. Based on this, as shown in fig. 4, the UE further includes: a receiving module 34.

A receiving module 34, connected to the decoding module 31, configured to receive a broadcast message sent by a network side device before the decoding module 31 performs decoding, where the broadcast message carries information indicating a sending subframe of an MCCH change notification corresponding to each carrier, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different. Based on this, the decoding module 31 is specifically configured to determine, according to the information indicating the transmission subframe of the MCCH change notification corresponding to each carrier, and decode, in the designated search space, the downlink control channel scrambled by using the designated RNTI based on the designated DCI format on the transmission subframe of the MCCH change notification corresponding to each carrier.

In an optional embodiment, the designated DCI format includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the downlink control channel, and the second information field is used to indicate an MCCH change notification. Based on this, the obtaining module 32 is specifically configured to obtain the carrier corresponding to the downlink control channel based on the value of the first information field in the DCI format carried by the downlink control channel, and obtain the MCCH change corresponding to the carrier based on the value of the second information field in the DCI format carried by the downlink control channel. Optionally, the designated DCI format is format 1C, and the first information field is a carrier indicator field CIF.

In an optional embodiment, the designated DCI format includes an MCCH change notification indicator field, where the MCCH change notification indicator field includes N bits, each bit corresponds to one MCCH, and when the value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

Optionally, N MCCH corresponding to the M carriers are numbered according to an increasing or decreasing order of carrier indexes, and the MCCH with the number being gradually increased corresponds to the MCCH with the number being gradually increased in the N bits from the lower bit to the higher bit. When one carrier corresponds to X MCCH, X MCCH corresponding to the carrier may be sorted first, then MCCH corresponding to M carriers are sorted according to the ascending or descending order of carrier index, and finally numbered uniformly.

Based on the foregoing optional embodiments, the obtaining module 32 may be specifically configured to obtain the MCCH change corresponding to the secondary carrier based on the MCCH change notification carried by the downlink control channel.

Each functional module of the UE provided in this embodiment may be configured to execute the procedure in the channel change learning method embodiment shown in fig. 1, and specific working principles thereof are not described again, for details, see description of the method embodiment.

The UE provided in this embodiment decodes, in an assigned search space based on an assigned DCI format, a downlink control channel scrambled with an assigned RNTI, and learns MCCH change based on an MCCH change notification carried by the downlink control channel, where the assigned search space is no longer limited to a common search space, so that the MCCH change notification corresponding to an auxiliary carrier can be learned, and notification of MCCH change corresponding to the auxiliary carrier is further implemented, so that an MBMS service can be performed on the auxiliary carrier, and further, the utilization rate of carrier resources is improved.

Fig. 5 is a schematic structural diagram of another UE according to an embodiment of the present invention. As shown in fig. 5, the UE includes: a decoder 51, a memory 52 and a processor 53.

A decoder 51, configured to decode, in the designated search space, the downlink control channel scrambled by the designated RNTI based on the designated DCI format; wherein the downlink control channel carries an MCCH change notification. Optionally, the downlink control channel may include a PDCCH or an E-PDCCH.

And a memory 52 for storing programs. In particular, the program may include program code comprising computer operating instructions. The memory 52 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

A processor 53 for executing the program stored in the memory 52 for: and acquiring the MCCH change based on the MCCH change notice borne by the downlink control channel.

The processor 53 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention.

Further, as shown in fig. 5, the UE further includes: a communication interface 54. The communication interface 54 is mainly responsible for communication between the UE and other devices, for example, for communication between the UE and a network-side device. Specifically, the communication interface 54 may receive a downlink control channel scrambled by using the specified RNTI sent by the network side device.

In an alternative embodiment, the processor 53 is further configured to determine the designated search space based on the M-RNTI or based on the M-RNTI and the carrier index before the decoding by the decoder 51. The processor 53 provides the specified search space to the decoder 51.

Optionally, the carrier index may refer to a carrier index at a system level, or the carrier index may be a cell-specific carrier index, and the cell-specific carrier index is the same for all users. The carrier index may also be a user-specific carrier index, i.e. a carrier index configured by a higher layer to the user equipment. Optionally, the designated search space is located on an auxiliary carrier, and the auxiliary carrier is a carrier for carrying a PMCH corresponding to the MCCH. It should be noted that, when the processor 53 in the UE determines the designated search space according to the M-RNTI and the carrier index, the designated search space may also be located on the primary carrier. When the processor 53 in the UE determines the designated search space according to the M-RNTI, if the values of the M-RNTI are not different for all carriers, the designated search space is located on an auxiliary carrier, that is, on an auxiliary carrier carrying the PMCH corresponding to the MCCH. Optionally, the designated RNTI is the M-RNTI.

In an alternative embodiment, the specified search space is a common search space. In order to distinguish the MCCH change notifications corresponding to different carriers, the MCCH change notifications corresponding to different carriers are set to have different transmission subframes. Based on this, the communication interface 54 is further configured to receive, before the decoder 51 performs decoding, a broadcast message sent by the network side device, where the broadcast message carries information indicating a sending subframe of the MCCH change notification corresponding to each carrier, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different. Based on this, the decoder 51 is specifically configured to determine the transmission subframe of the MCCH change notification corresponding to each carrier according to the information indicating the transmission subframe of the MCCH change notification corresponding to each carrier, and decode the downlink control channel scrambled with the specified RNTI in the specified search space based on the specified DCI format on the transmission subframe of the MCCH change notification corresponding to each carrier.

In an optional embodiment, the designated DCI format includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the downlink control channel, and the second information field is used to indicate an MCCH change notification. Based on this, the processor 53 is specifically configured to obtain the carrier corresponding to the downlink control channel based on the value of the first information field in the DCI format carried by the downlink control channel, and obtain the MCCH change corresponding to the carrier based on the value of the second information field in the DCI format carried by the downlink control channel. Optionally, the designated DCI format is format 1C, and the first information field is a carrier indicator field CIF.

Based on the foregoing optional embodiments, the processor 53 may be specifically configured to learn, based on the MCCH change notification carried by the downlink control channel, the MCCH change corresponding to the secondary carrier.

Alternatively, in a specific implementation, if the decoder 51, the memory 52, the processor 53 and the communication interface 54 are implemented independently, the decoder 51, the memory 52, the processor 53 and the communication interface 54 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended ISA (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 5, but this is not intended to represent only one bus or type of bus.

Alternatively, in a specific implementation, if the decoder 51, the memory 52, the processor 53 and the communication interface 54 are integrated on a chip, the decoder 51, the memory 52, the processor 53 and the communication interface 54 may complete the same communication through an internal interface.

The UE provided in this embodiment may be configured to execute the procedure in the channel change learning method embodiment shown in fig. 1, and specific working principles thereof are not described again, for details, see description of the method embodiment.

Fig. 6 is a schematic structural diagram of a network-side device according to an embodiment of the present invention. As shown in fig. 6, the network-side device includes: a scrambling module 61 and a transmitting module 62.

And the scrambling module 61 is configured to scramble a downlink control channel with the designated RNTI, where the downlink control channel carries the MCCH change notification. Optionally, the downlink control channel may include a PDCCH or an E-PDCCH.

And a sending module 62, connected to the scrambling module 61, configured to send the scrambled downlink control channel to the UE in the designated search space.

In an alternative embodiment, the specified search space is a proprietary search space. Optionally, the dedicated search space is a dedicated search space corresponding to an auxiliary carrier of the UE. Optionally, the designated RNTI is a C-RNTI.

In an optional implementation manner, as shown in fig. 7, the network-side device further includes: a determination module 63.

A determining module 63, configured to determine the designated search space according to the M-RNTI of the UE or determine the designated search space according to the M-RNTI and the carrier index of the UE before the sending module 62 sends the scrambled downlink control channel. The determining module 63 is connected to the sending module 62, and is configured to provide the specified search space to the sending module 62.

Optionally, the carrier index may refer to a carrier index at a system level, or the carrier index may be a cell-specific carrier index, and the cell-specific carrier index is the same for all users. The carrier index may also be a user-specific carrier index, i.e. a carrier index configured by a higher layer to the user equipment.

Optionally, the designated search space is located on an auxiliary carrier of the UE, where the auxiliary carrier is a carrier that carries a PMCH corresponding to the MCCH. It should be noted that, when the determining module 63 in the network side device determines the designated search space according to the M-RNTI and the carrier index, the designated search space may also be located on the primary carrier. When the determining module 63 in the network side device determines the designated search space according to the M-RNTI, if the values of the M-RNTI are not different for all carriers, the designated search space is located on an auxiliary carrier, that is, an auxiliary carrier carrying the PMCH corresponding to the MCCH.

Optionally, the designated RNTI is the M-RNTI.

In an alternative embodiment, the specified cable space is a common search space. In order to distinguish the MCCH change notifications corresponding to different carriers, the designated RNTI may be a carrier specific M-RNTI, and the carrier specific M-RNTIs corresponding to different carriers are different.

In an alternative embodiment, the specified cable space is a common search space. In order to distinguish the MCCH change notifications corresponding to different carriers, the MCCH change notifications corresponding to different carriers may be set to have different transmission subframes. Based on this, the sending module 62 is specifically configured to send, to the UE, a broadcast message before sending the scrambled downlink control channel, where the broadcast message carries information indicating a sending subframe of the MCCH change notification corresponding to each carrier, and the sending subframes of the MCCH change notifications corresponding to at least two carriers are different, and send, in the designated search space, the scrambled downlink control channel to the UE on the sending subframe of the MCCH change notification corresponding to each carrier.

In an optional embodiment, the DCI format corresponding to the downlink control channel includes a first information field and a second information field, where the first information field is used to indicate a carrier corresponding to the downlink control channel, and a user in the second information field indicates an MCCH change notification. In this embodiment, the network side device distinguishes MCCH change notifications corresponding to different carriers by specifying an information field in a DCI format corresponding to a downlink control channel.

In an optional embodiment, a DCI format corresponding to the downlink control channel includes an MCCH change notification indicator field, where the MCCH change notification indicator field includes N bits, each bit corresponds to one MCCH, and when a value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

Optionally, N MCCH corresponding to the M carriers are numbered according to an increasing or decreasing order of carrier indexes, and the MCCH with the number being gradually increased corresponds to the MCCH with the number being gradually increased in the N bits from the lower bit to the higher bit. When one carrier corresponds to X MCCH, X MCCH corresponding to the carrier may be sorted first, then MCCH corresponding to M carriers are sorted according to the ascending or descending order of carrier index, and finally numbered uniformly. In this embodiment, the network side device distinguishes MCCH change notifications corresponding to different carriers by specifying an information field in a DCI format corresponding to a downlink control channel.

The network side device of this embodiment may be a base station, but is not limited thereto.

Each functional module of the network side device provided in this embodiment may be configured to execute the flow in the channel change notification method embodiment shown in fig. 2, and specific working principles thereof are not described again, for details, see description of the method embodiment.

The network side device provided in this embodiment scrambles the downlink control channel by using the designated RNTI, and then sends the scrambled downlink control channel to the UE in the designated search space, so that the UE can decode the scrambled downlink control channel based on the designated DCI format, and further knows the MCCH change based on the MCCH change notification carried by the downlink control channel, where the designated search space is no longer limited to the common search space, so that the UE can be notified of the MCCH change corresponding to the auxiliary carrier, and the notification of the MCCH change corresponding to the auxiliary carrier is implemented, so that the MBMS service can be performed on the auxiliary carrier, and further the utilization rate of the carrier resource is improved.

Fig. 8 is a schematic structural diagram of another network-side device according to an embodiment of the present invention. As shown in fig. 8, the network-side device includes: memory 81, processor 82 and communication interface 83.

The memory 81 stores programs. In particular, the program may include program code comprising computer operating instructions. The memory 81 may comprise a high-speed RAM memory, and may further comprise a non-volatile memory (non-volatile memory), such as at least one disk memory.

A processor 82 for executing the program stored by the memory 81 for: and scrambling a downlink control channel by using the designated RNTI, wherein the downlink control channel bears the MCCH change notice. Optionally, the downlink control channel may include a PDCCH or an E-PDCCH.

And a communication interface 83, configured to send the scrambled downlink control channel to the UE in the designated search space.

In an optional embodiment, the processor 82 is further configured to determine the designated search space according to the M-RNTI of the UE or according to the M-RNTI of the UE and the carrier index before the communication interface 83 sends the scrambled downlink control channel. The processor 82 provides the specified search space to the communication interface 83.

Optionally, the designated search space is located on an auxiliary carrier of the UE, where the auxiliary carrier is a carrier that carries a PMCH corresponding to the MCCH. It should be noted that, when the processor 82 in the network side device determines the designated search space according to the M-RNTI and the carrier index, the designated search space may also be located on the primary carrier. When the processor 82 in the network side device determines the designated search space according to the M-RNTI, if the values of the M-RNTI are not different for all carriers, the designated search space is located on an auxiliary carrier, that is, an auxiliary carrier carrying the PMCH corresponding to the MCCH.

Optionally, the designated RNTI is the M-RNTI.

In an alternative embodiment, the specified cable space is a common search space. In order to distinguish the MCCH change notifications corresponding to different carriers, the MCCH change notifications corresponding to different carriers may be set to have different transmission subframes. Based on this, the communication interface 83 is specifically configured to send, to the UE, a broadcast message before sending the scrambled downlink control channel, where the broadcast message carries information indicating a sending subframe of the MCCH change notification corresponding to each carrier, where sending subframes of the MCCH change notifications corresponding to at least two carriers are different, and the scrambled downlink control channel is sent to the UE in the designated search space on the sending subframe of the MCCH change notification corresponding to each carrier.

Alternatively, in a specific implementation, if the memory 81, the processor 82 and the communication interface 83 are implemented independently, the memory 81, the processor 82 and the communication interface 83 may be connected to each other through a bus and perform communication with each other. The bus may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.

Optionally, in a specific implementation, if the memory 81, the processor 82 and the communication interface 83 are integrated on a chip, the memory 81, the processor 82 and the communication interface 83 may complete the same communication through an internal interface.

The network side device provided in this embodiment may be configured to execute the procedure in the channel change notification method embodiment shown in fig. 2, and specific working principles thereof are not described again, for details, see description of the method embodiment.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A channel change learning method, comprising:

the user equipment acquires MCCH change based on the MCCH change notification carried by the downlink control channel;

the specified search space is a special search space, and the special search space is a special search space corresponding to the auxiliary carrier;

the user equipment learns the MCCH change based on the MCCH change notification carried by the downlink control channel, and the step of acquiring the MCCH change comprises the following steps: and the user equipment acquires the MCCH change corresponding to the auxiliary carrier based on the MCCH change notification carried by the downlink control channel.

2. The channel change learning method of claim 1, wherein the designated RNTI is a cell radio network temporary identity, C-RNTI.

3. The method of claim 1, wherein the ue, before decoding the downlink control channel scrambled with the specified RNTI in the specified search space according to the specified DCI format, comprises:

4. The channel change learning method of claim 3 wherein the carrier index is a cell specific carrier index, and wherein the cell specific carrier index is the same for all users.

5. The channel change awareness method of claim 3 wherein the designated search space is located on a secondary carrier.

6. The channel change awareness method according to any one of claims 3-5, wherein the designated RNTI is the M-RNTI.

7. The method according to any of claims 1-5, wherein the specific DCI format comprises a first information field and a second information field, the first information field is used for indicating a carrier corresponding to the downlink control channel, and the second information field is used for indicating an MCCH change notification;

8. The method of claim 7, wherein the specific DCI format is Format 1C, and the first information field is a Carrier Indicator Field (CIF).

9. The channel change learning method according to any one of claims 1 to 5, wherein the specified DCI format includes an MCCH change notification indication field, the MCCH change notification indication field includes N bits, each bit corresponds to an MCCH, and when the value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

10. The method according to claim 9, wherein N MCCHs corresponding to the M carriers are numbered in an increasing or decreasing order of carrier index, and wherein the N bits sequentially correspond to the MCCH with the number increasing from lower to higher in order from lower to higher.

11. The method according to any of claims 1-5, wherein the downlink control channel comprises a physical downlink control channel or an enhanced physical downlink control channel.

12. A channel change notification method, comprising:

the network side equipment sends the scrambled downlink control channel to user equipment in a designated search space;

the specified search space is a dedicated search space, the dedicated search space is a dedicated search space corresponding to an auxiliary carrier of the user equipment, and the MCCH change notification carried by the downlink control channel is an MCCH change notification corresponding to the auxiliary carrier.

13. The channel change notification method according to claim 12, wherein the designated RNTI is a cell radio network temporary identity C-RNTI.

14. The method of claim 12, wherein before the network side device specifies the search space and sends the scrambled downlink control channel to the user equipment, the method comprises:

15. The channel change notification method according to claim 14, wherein the carrier index is a cell-specific carrier index, and the cell-specific carrier index is the same for all users.

16. The channel change notification method of claim 14, wherein the designated search space is located on a secondary carrier of the ue.

17. The channel change notification method according to any of claims 14 to 16, wherein the designated RNTI is the M-RNTI.

18. The method according to any of claims 12-16, wherein a downlink control information DCI format corresponding to the downlink control channel comprises a first information field and a second information field, the first information field is used to indicate a carrier corresponding to the downlink control channel, and a user of the second information field indicates the MCCH change notification.

19. The channel change notification method according to any one of claims 12 to 16, wherein a DCI format corresponding to the downlink control channel includes an MCCH change notification indicator field, the MCCH change notification indicator field includes N bits, each bit corresponds to one MCCH, and when a value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

20. The method of claim 19, wherein N MCCHs corresponding to the M carriers are numbered in an increasing or decreasing order of carrier index, and wherein the N bits sequentially correspond to the MCCH with the number being smaller to larger from lower to higher.

21. The method according to any of claims 12 to 16, wherein the downlink control channel comprises a physical downlink control channel or an enhanced physical downlink control channel.

22. A user device, comprising:

an obtaining module, configured to obtain an MCCH change based on an MCCH change notification carried by the downlink control channel;

the obtaining module is specifically configured to obtain, based on the MCCH change notification carried by the downlink control channel, the MCCH change corresponding to the secondary carrier.

23. The UE of claim 22, wherein the designated RNTI is a cell radio network temporary identity (C-RNTI).

24. The user equipment of claim 22, further comprising:

and the determining module is used for determining the appointed search space according to the multimedia broadcast multicast service radio network temporary identifier M-RNTI or determining the appointed search space according to the M-RNTI and the carrier index before the decoding module decodes.

25. The UE of claim 24, wherein the carrier index is a cell-specific carrier index, and wherein the cell-specific carrier index is the same for all users.

26. The UE of claim 24, wherein the designated search space is located on a secondary carrier.

27. The user equipment as recited in any of claims 24-26, wherein the designated RNTI is the M-RNTI.

28. The UE of any one of claims 24 to 26, wherein the specific DCI format comprises a first information field and a second information field, the first information field is used for indicating a carrier corresponding to the downlink control channel, and the second information field is used for indicating an MCCH change notification;

29. The ue of claim 28, wherein the designated DCI format is format 1C and the first information field is a carrier indicator field CIF.

30. The UE of any one of claims 22 to 26, wherein the designated DCI format includes an MCCH change notification indicator field, the MCCH change notification indicator field includes N bits, each bit corresponds to an MCCH, and when a value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

31. The UE of claim 30, wherein N MCCHs corresponding to the M carriers are numbered in an increasing or decreasing order of carrier indexes, and wherein the N MCCHs with the numbers from small to large sequentially correspond to the N MCCHs with the numbers from low to high in the N bits.

32. The UE of any one of claims 22-26, wherein the downlink control channel comprises a physical downlink control channel or an enhanced physical downlink control channel.

33. A network-side device, comprising:

a sending module, configured to send the scrambled downlink control channel to a user equipment in a designated search space;

34. The network side device of claim 33, wherein the specified RNTI is a cell radio network temporary identity, C-RNTI.

35. The network-side device of claim 33, further comprising:

a determining module, configured to determine the designated search space according to the multimedia broadcast multicast service radio network temporary identifier M-RNTI of the user equipment, or determine the designated search space according to the M-RNTI and the carrier index of the user equipment, before the sending module sends the scrambled downlink control channel.

36. The network-side device of claim 35, wherein the carrier index is a cell-specific carrier index, and wherein the cell-specific carrier index is the same for all users.

37. The network-side device of claim 35, wherein the designated search space is located on a secondary carrier of the ue.

38. The network side device according to any of claims 35-37, wherein the specified RNTI is the M-RNTI.

39. The network-side device of any one of claims 33 to 37, wherein a downlink control information DCI format corresponding to the downlink control channel includes a first information field and a second information field, the first information field is used to indicate a carrier corresponding to the downlink control channel, and a user of the second information field indicates the MCCH change notification.

40. The network-side device of any one of claims 33 to 37, wherein a DCI format corresponding to the downlink control channel includes an MCCH change notification indicator field, where the MCCH change notification indicator field includes N bits, each bit corresponds to one MCCH, and when a value of the bit is 1, the MCCH corresponding to the bit is changed; the N MCCHs corresponding to the N bits comprise MCCHs corresponding to M carriers, wherein N is an integer greater than or equal to 2, and M is an integer greater than or equal to 2.

41. The network-side device of claim 40, wherein N MCCHs corresponding to the M carriers are numbered in an increasing or decreasing order of carrier indexes, and wherein MCCHs with a smaller number are sequentially corresponding to the N bits from the lower order to the higher order.

42. The network-side device of any one of claims 33-37, wherein the downlink control channel comprises a physical downlink control channel, or an enhanced physical downlink control channel.

43. A user device, comprising:

a memory for storing a program;

a processor for executing the program to: acquiring MCCH change based on the MCCH change notification carried by the downlink control channel; the specified search space is a special search space, and the special search space is a special search space corresponding to the auxiliary carrier;

based on the MCCH change notification carried by the downlink control channel, acquiring the MCCH change comprises: and the user equipment acquires the MCCH change corresponding to the auxiliary carrier based on the MCCH change notification carried by the downlink control channel.

44. A network-side device, comprising:

a memory for storing a program;

a communication interface, configured to send the scrambled downlink control channel to a user equipment in a designated search space;