CN103797880A

CN103797880A - Transmission control methoc, device, and system

Info

Publication number: CN103797880A
Application number: CN201380002570.8A
Authority: CN
Inventors: 沈乐乐; 张劲林
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-11-08
Filing date: 2013-11-08
Publication date: 2014-05-14
Anticipated expiration: 2033-11-08
Also published as: WO2015066890A1; CN103797880B

Abstract

The embodiment of the invention provides a transmission control methoc, device, and system, and relates to communicaiton field. The method may support DPS/DPB and JT technology so as to improve the compatibility of the DPS/DPB and the JT technology. The method may comprises: that a wireless access device acquires first CQI, determines at least one CQI estimated value according to the first CQI, and selects one TP or one TP group from multiple candidate TPs for the UE in order to perform data transmission according to the first CQI and the determined at least one CQI estimated value, wherein the first CQI reflects the state of a channel from a service TP to the UE, each CQI estimated value reflects the state of a channel from a cooperative TP to the UE, or the state of an equivalent channel from a cooperative TP group to the UE, the TP group comprises multiple candidate TPs used for united transmission.

Description

Transmission control method, device and system

Technical Field

The present invention relates to the field of communications, and in particular, to a transmission control method, apparatus, and system.

Background

In recent years, with the development of LTE (Long Term Evolution) technology, LTE-a (Evolution version of LTE) has come to be developed as a further Evolution of LTE technology. In order to meet higher system capacity and coverage requirements, CoMP (coordinated Multi-point transmission) is one of the key characteristics of LTE-a as an effective interference coordination and Multi-point transmission technology. The main transmission strategy of CoMP includes DPS (Dynamic Point Selection)/DPB (Dynamic Point Blanking), JT (joint transmission), and the like.

The main technical principle of DPS/DPB is as follows: an access network side (e.g., a base station) selects an appropriate TP to transmit data according to CSI (Channel State Information) from each TP (Transmission Point) to a UE (User Equipment), and control Information is still transmitted through a serving cell, that is, a DPS; meanwhile, whether part of TP, namely DPB, needs to be turned off on some resources is judged according to the interference situation.

The technical principle of JT is similar to DPS/DPB, except that the access network side selects an appropriate TP group to jointly transmit data according to the CSI of the TP group to the UE.

However, in the prior art, not all UEs can support DPS/DPB and JT technologies, resulting in poor compatibility of such technologies. For example, in the 3GPP protocol, regarding the protocol version before the R11 version of LTE, the UE only reports one or two sets of CSI, and the access network side cannot obtain CSI of each TP in the cooperating set, so that it is not possible to determine DPS/DPB or JT.

Disclosure of Invention

Embodiments of the present invention provide a transmission control method, apparatus, and system, which can support DPS/DPB and JT technologies, thereby improving compatibility of the DPS/DPB and JT technologies.

In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a transmission control method for a wireless access device to select at least one TP for a user equipment UE from multiple candidate transmission points TPs for data transmission, where the multiple candidate TPs include a serving TP and at least one cooperating TP of the UE, and the method includes:

the method comprises the steps that wireless access equipment obtains a first Channel Quality Indicator (CQI), and the first CQI reflects the state of a channel from a service TP to UE;

the wireless access equipment determines at least one CQI estimated value according to the first CQI, wherein each CQI estimated value reflects the state of a channel from one cooperative TP to the UE or reflects the state of an equivalent channel from a TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission;

and the wireless access equipment selects one TP or one TP group for the UE from the plurality of candidate TPs for data transmission according to the first CQI and the determined at least one CQI estimated value.

In a first possible implementation manner of the first aspect, the determining, by the radio access device, each CQI estimate includes:

the wireless access equipment determines a first signal to interference plus noise ratio (SINR) corresponding to the first CQI;

the wireless access equipment adjusts the first SINR to obtain a second SINR according to the obtained Reference Signal Received Power (RSRP);

and the wireless access equipment determines a second CQI corresponding to the second SINR, wherein the second CQI is the currently determined CQI estimated value.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, when a currently determined CQI estimate reflects a state of a channel from one coordinated TP to the UE, the coordinated TP is made to be the current TP, and the wireless access device adjusts the first SINR according to the following formula:

<math> <mrow> <msub> <mi>SINR</mi> <mi>DPS</mi> </msub> <mo>=</mo> <msub> <mi>SINR</mi> <mi>s</mi> </msub> <mo>·</mo> <mfrac> <msub> <mi>RSRP</mi> <mi>DPS</mi> </msub> <mrow> <munder> <mi>Σ</mi> <mrow> <mi>i</mi> <mo>&NotEqual;</mo> <mi>DPS</mi> <mo>,</mo> <mi>i</mi> <mo>&NotElement;</mo> <mi>DPB</mi> </mrow> </munder> <msub> <mi>RSRP</mi> <mi>i</mi> </msub> </mrow> </mfrac> <mo>·</mo> <mfrac> <mrow> <munder> <mi>Σ</mi> <mrow> <mi>i</mi> <mo>&NotEqual;</mo> <mi>s</mi> </mrow> </munder> <msub> <mi>RSRP</mi> <mi>i</mi> </msub> </mrow> <msub> <mi>RSRP</mi> <mi>s</mi> </msub> </mfrac> </mrow> </math>

wherein, the SINR_DPSIs the second SINR, SINR_sIs the first SINR, RSRP_DPSThe RSRP corresponding to the current TP,

to remove RSRP_DPSSum of all RSRPs except RSRP_sFor the RSRP corresponding to the serving TP,to remove RSRP_sSum of all RSRP except.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner, when a currently determined CQI estimation value reflects a state of an equivalent channel from a TP group to the UE, the TP group is made to be the current TP group, and the wireless access device adjusts the first SINR according to the following formula:

<math> <mrow> <msub> <mi>SINR</mi> <mi>JT</mi> </msub> <mo>=</mo> <msub> <mi>SINR</mi> <mi>s</mi> </msub> <mo>·</mo> <mfrac> <mrow> <munder> <mi>Σ</mi> <mrow> <mi>i</mi> <mo>&NotElement;</mo> <mi>JT</mi> </mrow> </munder> <msub> <mi>RSRP</mi> <mi>DPS</mi> </msub> </mrow> <mrow> <munder> <mi>Σ</mi> <mrow> <mi>i</mi> <mo>&NotElement;</mo> <mi>JT</mi> <mo>,</mo> <mi>i</mi> <mo>&NotElement;</mo> <mi>DPB</mi> </mrow> </munder> <msub> <mi>RSRP</mi> <mi>i</mi> </msub> </mrow> </mfrac> <mo>·</mo> <mfrac> <mrow> <munder> <mi>Σ</mi> <mrow> <mi>i</mi> <mo>&NotEqual;</mo> <mi>s</mi> </mrow> </munder> <msub> <mi>RSRP</mi> <mi>i</mi> </msub> </mrow> <msub> <mi>RSRP</mi> <mi>s</mi> </msub> </mfrac> </mrow> </math>

wherein, the SINR_JTIs the second SINR, SINR_sIn order to achieve the first SINR,

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to removeSum of all RSRPs except the RSRP corresponding to idle TP, RSRP_sIs a garmentThe RSRP corresponding to the traffic TP,to remove RSRP_sSum of all RSRP except.

With reference to the first aspect or any implementation manner of the first possible implementation manner to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, before the performing, by the wireless access device, data transmission by using the selected TP or TP group, the method further includes:

the wireless access equipment determines a Precoding Matrix Indicator (PMI) required by transmission, and comprises the following steps:

when the wireless access equipment obtains the PMI of the selected TP or the TP group, the wireless access equipment takes the obtained PMI as the PMI required by the transmission; or

And when the wireless access equipment does not obtain the PMI of the selected TP or TP group, the wireless access equipment adopts a cyclic codebook or a random mode to determine the PMI required by transmission.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the determining, by the radio access device, the PMI required for transmission in a cyclic codebook or a random manner specifically includes:

and the wireless access equipment determines the PMI required by transmission in a circulating codebook mode or a random mode according to the index of Resource Blocks (RB) occupied by a Physical Downlink Shared Channel (PDSCH) or the number of the RBs.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner, the determining, by the radio access device, the PMI required for transmission in a cyclic codebook manner or a random manner according to the index of the RB occupied by the PDSCH or the number of RBs includes:

the wireless access device determines a cycle start Precoding Matrix Indicator (PMI) sequence number of a current Transmission Time Interval (TTI),

the wireless access equipment respectively determines the PMI required by the transmission corresponding to the index of the RB according to the cycle starting PMI serial number, the index of the RB and the number of codebooks;

or,

and the wireless access equipment respectively determines the PMIs required by the transmission corresponding to the number of the RBs in a random mode according to the number of the RBs.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner, the determining, by the radio access device, a cycle start PMI sequence number of a current TTI, and determining, according to the cycle start PMI sequence number, an index of an RB, and a number of codebooks, a PMI required for transmission corresponding to the index of the RB respectively includes:

the wireless access equipment is according to formula P_start= MmodN, determining the cycle start PMI serial number, wherein M is the number of times that the current TP sends data to the UE, N is the number of codebooks, P is_startA PMI serial number is started for the circulation;

the wireless access equipment is according to formula P_i=（P_start+ i) modN, respectively determining PMIs required for the transmission corresponding to the indexes of the RBs, wherein P_iI is an index of the RB for the PMI required for the transmission.

With reference to any implementation manner of the first possible implementation manner to the seventh possible implementation manner of the first aspect, in an eighth possible implementation manner, before the performing, by the wireless access device, data transmission by using the selected TP or TP group, the method further includes:

the method for determining the Rank Indication (RI) required by transmission by the wireless access equipment comprises the following steps:

when the wireless access equipment obtains the RI of the selected TP or the TP group, the wireless access equipment takes the obtained RI as the RI required by the transmission; or

And when the radio access equipment does not obtain the RI of the selected TP or the RI of the TP group, the radio access equipment takes a first RI as the RI required by the transmission, wherein the first RI is the RI of the service TP acquired by the radio access equipment.

In a second aspect, an embodiment of the present invention provides a transmission control method for a wireless access device to select at least one TP for a UE from a plurality of candidate TPs for data transmission, where the plurality of candidate TPs include a serving TP of the UE, a first cooperating TP, and at least one second cooperating TP, the method includes:

the method comprises the steps that wireless access equipment acquires a first CQI, and the first CQI reflects the state of a channel serving TP to UE;

the wireless access device obtains a second CQI, the second CQI reflecting a state of a channel from a first cooperation TP to the UE;

the wireless access equipment determines at least one CQI estimated value according to the first CQI, wherein each CQI estimated value reflects the state of a channel from a second cooperation TP to the UE or reflects the state of an equivalent channel from a TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission;

the wireless access device selects one TP or one TP group from the plurality of candidate TPs for the UE to transmit data according to the first CQI, the second CQI and the determined at least one CQI estimated value.

In a first possible implementation manner of the second aspect, the determining, by the radio access device, each CQI estimate includes:

the wireless access equipment determines a first SINR corresponding to the first CQI;

the wireless access equipment adjusts the first SINR to obtain a second SINR according to the obtained RSRP;

and the wireless access equipment determines a third CQI corresponding to the second SINR, wherein the third CQI is the currently determined CQI estimated value.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, when the currently determined CQI estimate value reflects a state of a channel from a second cooperative TP to the UE, the second cooperative TP is made to be a current TP, and the wireless access device adjusts the first SINR according to the following formula:

to remove RSRP_DPSSum of all RSRPs except RSRP_sFor the RSRP corresponding to the serving TP,

to remove RSRP_sSum of all RSRP except.

With reference to the first possible implementation manner of the second aspect, in a third possible implementation manner, when a currently determined CQI estimate reflects a state of an equivalent channel from a TP group to the UE, the TP group is made to be the current TP group, and the wireless access device adjusts the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

Sum of all RSRPs except the RSRP corresponding to idle TP, RSRP_sFor the RSRP corresponding to the serving TP,to remove RSRP_sSum of all RSRP except.

With reference to the second aspect or any implementation manner of the first possible implementation manner to the third possible implementation manner of the second aspect, in a fourth possible implementation manner, before the performing data transmission by using the selected TP or TP group, the method further includes:

the wireless access equipment determines the PMI required by transmission, and comprises the following steps:

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the determining, by the radio access device, the PMI required for transmission in a cyclic codebook or a random manner specifically includes:

and the wireless access equipment determines the PMI required by transmission in a circulating codebook mode or a random mode according to the indexes of the RBs occupied by the PDSCH or the number of the RBs.

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner, the determining, by the radio access device, the PMI required for transmission in a cyclic codebook manner or a random manner according to the index of the RB occupied by the PDSCH or the number of RBs includes:

the wireless access device determines a cycle start PMI sequence number for a current TTI,

or,

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the second aspect, in a seventh possible implementation manner, the determining, by the radio access device, a cycle start PMI sequence number of a current TTI, and determining, according to the cycle start PMI sequence number, an index of an RB, and a number of codebooks, a PMI required for transmission corresponding to the index of the RB respectively includes:

the wireless access equipment is according to formula P_i=（P_start+ i) modN, respectively determining PMIs required for the transmission corresponding to the indexes of the RBs, wherein P_iPMI required for said transmission, i beingThe index of the RB.

With reference to any implementation manner of the first possible implementation manner to the seventh possible implementation manner of the second aspect, in an eighth possible implementation manner, before the performing, by the wireless access device, data transmission by using the selected TP or TP group, the method further includes:

the wireless access equipment determines the RI required for transmission, and comprises the following steps:

In a third aspect, an embodiment of the present invention provides a wireless access device, configured to select at least one TP for a UE from multiple candidate TPs for data transmission, where the multiple candidate TPs include a serving TP and at least one cooperating TP of the UE, and the wireless access device includes:

an obtaining unit, configured to obtain a first CQI, where the first CQI reflects a state of a channel serving a TP to a UE;

a determining unit, configured to determine at least one CQI estimation value according to the first CQI acquired by the acquiring unit, where each CQI estimation value reflects a state of a channel from one coordinated TP to the UE, or reflects a state of an equivalent channel from a TP group to the UE, where the TP group includes a plurality of candidate TPs for joint transmission;

a selecting unit, configured to select one TP or one TP group for the UE from the multiple candidate TPs for data transmission according to the first CQI acquired by the acquiring unit and the at least one CQI estimation value determined by the determining unit.

In a first possible implementation form of the third aspect,

the determining unit is specifically configured to determine a first SINR corresponding to the first CQI obtained by the obtaining unit, and adjust the first SINR according to the RSRP obtained by the obtaining unit to obtain a second SINR; and determining a second CQI corresponding to the second SINR, wherein the second CQI is the currently determined CQI estimated value.

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner,

the determining unit is specifically configured to, when the currently determined CQI estimation value reflects a state of a channel from one coordinated TP to the UE, make the coordinated TP be the current TP, and adjust the first SINR according to the following formula:

to remove RSRP_sSum of all RSRP except.

With reference to the first possible implementation manner of the third aspect, in a third possible implementation manner,

the determining unit is specifically configured to, when the currently determined CQI estimation value reflects a state of an equivalent channel from a TP group to the UE, make the TP group be the current TP group, and adjust the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

Sum of all RSRPs except the RSRP corresponding to idle TP, RSRP_sFor the RSRP corresponding to the serving TP,

to remove RSRP_sSum of all RSRP except.

With reference to the second aspect or any one implementation manner of the first possible implementation manner to the third possible implementation manner of the second aspect, in a fourth possible implementation manner,

the determining unit is further configured to determine a PMI required for transmission before data transmission is performed using the TP or the TP group selected by the selecting unit;

wherein, the determining unit is specifically configured to, when the obtaining unit obtains the PMI of the selected TP or TP group, use the obtained PMI as the PMI required for the transmission; or

The determining unit is specifically configured to determine the PMI required for transmission in a cyclic codebook or a random manner when the obtaining unit does not obtain the PMI of the selected TP or TP group.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner,

the determining unit is specifically configured to determine the PMI required for transmission in a cyclic codebook manner or a random manner according to an index of an RB occupied by the PDSCH or the number of RBs.

With reference to the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner,

the determining unit is specifically configured to determine a cyclic start PMI sequence number of the current TTI, and determine, according to the cyclic start PMI sequence number, the index of the RB, and the number of codebooks, a PMI required for the transmission corresponding to the index of the RB, respectively;

or,

the determining unit is specifically configured to determine, according to the number of RBs, PMIs required for transmission respectively corresponding to the number of RBs in a random manner.

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the third aspect, in a seventh possible implementation manner,

the determination unit is specifically configured to determine the value of the equation P_start= MmodN, determining the cycle start PMI serial number, wherein M is the number of times that the current TP sends data to the UE, N is the number of codebooks, P is_startPMI sequence number for the cycle start and according to formula P_i=（P_start+ i) modN, respectively determining PMIs required for the transmission corresponding to the indexes of the RBs, wherein P_iI is an index of the RB for the PMI required for the transmission.

With reference to any one implementation manner of the first possible implementation manner to the seventh implementation manner of the third aspect, in an eighth possible implementation manner,

the determining unit is further configured to determine an RI required for transmission before data transmission is performed using the TP or the TP group selected by the selecting unit;

wherein, the determining unit is specifically configured to, when the obtaining unit obtains the RI of the selected TP or TP group, use the obtained RI as the RI required for the transmission; or

The determining unit is specifically configured to, when the obtaining unit does not obtain the RI of the selected TP or TP group, use a first RI as the RI required for the transmission, where the first RI is the RI of the service TP obtained by the obtaining unit.

In a fourth aspect, an embodiment of the present invention provides a wireless access device, configured to select at least one TP for a UE from a plurality of candidate TPs for data transmission, where the plurality of candidate TPs include a serving TP of the UE, a first cooperating TP, and at least one second cooperating TP, and the wireless access device includes:

an obtaining unit, configured to obtain a first CQI and a second CQI, where the first CQI reflects a state of a channel serving a TP to a UE, and the second CQI reflects a state of a channel of a first cooperation TP to the UE;

a determining unit, configured to determine at least one CQI estimation value according to the first CQI acquired by the acquiring unit, where each CQI estimation value reflects a state of a channel from a second coordinated TP to the UE, or reflects a state of an equivalent channel from a TP group to the UE, where the TP group includes a plurality of candidate TPs for joint transmission;

a selecting unit, configured to select one TP or one TP group for data transmission for the UE from the multiple candidate TPs according to the first CQI acquired by the acquiring unit, the second CQI, and at least one CQI estimation value determined by the determining unit.

In a first possible implementation form of the fourth aspect,

the determining unit is specifically configured to determine a first SINR corresponding to the first CQI obtained by the obtaining unit, adjust the first SINR according to the RSRP obtained by the obtaining unit to obtain a second SINR, and determine a third CQI corresponding to the second SINR, where the third CQI is a currently determined CQI estimation value.

With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner,

the determining unit is specifically configured to, when the currently determined CQI estimation value reflects a state of a channel from a second coordinated TP to the UE, make the second coordinated TP a current TP, and adjust the first SINR according to the following formula:

to remove RSRP_sSum of all RSRP except.

With reference to the first possible implementation manner of the fourth aspect, in a third possible implementation manner,

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to removeSum of all RSRPs except the RSRP corresponding to idle TP, RSRP_sFor the RSRP corresponding to the serving TP,

to remove RSRP_sSum of all RSRP except.

With reference to the fourth aspect or any one implementation manner of the first possible implementation manner to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner,

With reference to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner,

With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner,

or,

With reference to the fifth possible implementation manner or the sixth possible implementation manner of the fourth aspect, in a seventh possible implementation manner,

With reference to any one implementation manner of the first possible implementation manner to the seventh possible implementation manner of the fourth aspect, in an eighth possible implementation manner,

The determining unit is specifically configured to, when the obtaining unit does not obtain the RI of the selected TP or the TP group, use a first RI as the RI required for the transmission, where the first RI is the RI of the obtained serving TP.

In a fifth aspect, an embodiment of the present invention provides a transmission control system, including:

the wireless access device of the third or fourth aspect and the UE performing data transmission with the wireless access device.

The embodiment of the invention provides a transmission control method, a device and a system, wherein a first CQI is acquired through wireless access equipment, at least one CQI estimated value is determined according to the first CQI, and one TP or one TP group is selected for UE from a plurality of candidate TPs for data transmission according to the first CQI and the determined at least one CQI estimated value, wherein the first CQI reflects the state of a channel from a service TP to the UE, each CQI estimated value reflects the state of a channel from a cooperation TP to the UE, or reflects the state of an equivalent channel from one TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission. According to the scheme, under the condition that the CQI acquired by the wireless access equipment is limited, the wireless access equipment can obtain a plurality of CQI estimated values of a plurality of candidate TPs to UE which are not acquired by adjusting the acquired CQI, so that the wireless access equipment can synthesize the acquired CQI and the plurality of CQI estimated values obtained after adjustment to select a proper TP or TP group for the UE, namely the TP or TP group with better CSI, to perform data transmission with the UE, and therefore, the DPS/DPB and JT technologies can be supported, and the compatibility of the DPS/DPB and JT technologies 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 used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a first flowchart of a transmission control method according to an embodiment of the present invention;

fig. 2 is a second flowchart of a transmission control method according to an embodiment of the present invention;

fig. 3 is a third flowchart of a transmission control method according to an embodiment of the present invention;

fig. 4 is a fourth flowchart of a transmission control method according to an embodiment of the present invention;

fig. 5 is a fifth flowchart of a transmission control method according to an embodiment of the present invention;

fig. 6 is a sixth flowchart of a transmission control method according to an embodiment of the present invention;

fig. 7 is a seventh flowchart of a transmission control method according to an embodiment of the present invention;

fig. 8 is a flowchart eight of a transmission control method according to an embodiment of the present invention;

fig. 9 is a flowchart nine of a transmission control method according to an embodiment of the present invention;

fig. 10 is a flowchart ten of a transmission control method according to an embodiment of the present invention;

fig. 11 is a first schematic structural diagram of a wireless access device according to an embodiment of the present invention;

fig. 12 is a second schematic structural diagram of a wireless access device according to an embodiment of the present invention;

fig. 13 is a third schematic structural diagram of a wireless access device according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a wireless access device according to a fourth embodiment of the present invention;

fig. 15 is a block diagram of a transmission control system according to an embodiment of the present invention.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

The various techniques described herein may be used in various wireless communication systems, such as current 2G, 3G communication systems and next generation communication systems, such as GSM (Global System for mobile communications), CDMA (Code Division Multiple Access) systems, TDMA (Time Division Multiple Access) systems, WCDMA (Wideband Code Division Multiple Access) systems, FDMA (Frequency Division Multiple Access) systems, OFDMA (Orthogonal Frequency-Division Multiple Access) systems, SC-FDMA (Single carrier Frequency Division Multiple Access) systems, General Packet Access (GPRS) systems, and other General Single carrier communication systems.

A UE may be a wireless terminal, which may be a wired terminal or a wireless terminal, which may be a device that provides voice and/or data connectivity only to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a RAN (Radio Access Network) to exchange language and/or data with a Radio Access Network. For example, PCS (Personal Communication Service) phones, cordless phones, Session Initiation Protocol (SIP) phones, WLL (Wireless Local Loop) stations, PDAs (Personal Digital assistants), and the like. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), or a User equipment.

The radio access device is a device on the access network side, and may be, for example, a Base Station in various communication systems (e.g., GSM, CDMA, TDMA, WCDMA, LTE, etc.), a BSC (Base Station Controller) in GSM, an RNC (radio network Controller) in UMTS (Universal mobile telecommunications System ), or the like.

As will be understood from the description of the background art, the existing DPS/DPB and JT technologies need to be based on the LTE protocol R11 and beyond. Based on R11 and later versions, the UE may be configured as a transmission mode 10 (TM 10), and may configure a plurality of CSI processes (processes) for the UE through a higher layer signaling, where each CSI process corresponds to one CSI-RS (CSI ReferenceSignal) resource configuration and one CSI-IM (CSI interference measurement) resource configuration, and respectively corresponds to measurement of signals and interference, and the UE measures and reports CSI for each CSI process according to the configured CSI-RS and CSI-IM. The base station selects the TPs for TP data transmission and resource idle (blanking) conditions of the TPs according to the CSI of each CSI process reported by the UE by appropriate criteria, such as maximum throughput, maximum priority, and the like. Finally, the base station indicates the Resource allocation situation and the status of the PQI (physical downlink Shared Channel Resource Mapping and quasi-synchronization Indicator) to the UE, wherein the PQI includes the Resource Mapping situation and the synchronization situation of the Physical Downlink Shared Channel (PDSCH). The UE performs data Demodulation using DMRS (Demodulation reference signal). Similarly, existing JT technology is also based on LTE protocol R11 release. And the base station judges which TPs carry out joint transmission and actual transmission information according to the CSI reports corresponding to the TPs.

In the protocol version before the LTE protocol R11 version, the UE only supports reporting of one or two sets of CSI, and if the UE only supports reporting of one set of CSI, the access network side cannot determine DPS/DPB or JT, and if the UE supports reporting of two sets of CSI, the access network side cannot determine JT.

In view of this, in the following embodiments, when the UE only feeds back CSI corresponding to some candidate TPs, CSI corresponding to other candidate TPs that are not fed back by the UE is estimated using CSI fed back by the UE and RSRP (Reference Signal Receiving Power) reported by the UE or obtained by the access network device itself, and then TPs is selected for the UE through CSI corresponding to all candidate TPs, so as to implement DPS/DPB or JT.

It should be noted that the candidate TPs are all TPs in the cooperation set, and may include the serving TP and at least one cooperating TP of the UE. In addition, the cooperation set may be determined by the access network device according to RSRP reported by the UE or obtained by the access network device, which is not described in detail herein for the prior art.

In addition, the CSI may include a CQI (Channel Quality Indicator), and may further include a PMI (Precoding Matrix Indicator) and an RI (Rank Indicator). The CQI is used to reflect the quality of the channel, the RI is used to indicate the number of effective data layers of the channel, and the PMI is used to indicate which codebook in the codebook set is used. Therefore, the base station can select TPs for the UE for data transmission according to CQIs corresponding to the TPs, and can select appropriate PMIs and RIs for data transmission.

Furthermore, in the following embodiments, when the UE only feeds back the CQIs corresponding to part of the candidate TPs, the CQIs corresponding to other candidate TPs that are not fed back by the UE are estimated using the CQIs fed back by the UE and RSRPs reported by the UE or obtained by the access network device itself, and then TPs are selected for the UE by using the CQIs corresponding to all candidate TPs, thereby implementing DPS/DPB or JT.

Furthermore, the PMI can adopt a circulating codebook mode to obtain a diversity effect; the RI may still adopt the RI reported by the UE. These will be described in detail in the following examples.

Hereinafter, a DPS (first embodiment, for example, version before R9 or R9) when the radio access device acquires a set of CSI, a DPS (second embodiment, for example, version R10) when the radio access device acquires two sets of CSI, and a JT (third embodiment) when the radio access device acquires a set of CSI are described as examples, respectively, but the JT when the radio access device acquires two sets of CSI is similar to the third embodiment, and a CQI estimation value is calculated by using a CQI corresponding to a serving TP, and therefore, the following embodiments will not be described in detail.

Example one

An embodiment of the present invention provides a transmission control method, taking DPS decision under a condition that a wireless access device acquires a set of CSI as an example, the method may be used for the wireless access device to select one TP for a UE from a plurality of candidate TPs for data transmission, where the plurality of candidate TPs include a serving TP and at least one cooperating TP of the UE, as shown in fig. 1, the method may include:

s101, the wireless access equipment acquires a first CQI, wherein the first CQI reflects the state of a channel serving TP to UE.

Before the wireless access equipment communicates with the UE, the wireless access equipment needs to know the quality of a communication channel between the wireless access equipment and the UE, and the wireless access equipment can select a proper TP for the UE to communicate according to the quality of the communication channel. First, the wireless access device acquires a first CQI, wherein the first CQI may reflect a state of a channel serving the TP to the UE, i.e., a quality of the channel serving the TP to the UE.

It should be noted that, for an FDD (Frequency Division duplex) system, the first CQI obtained by the wireless access device may be reported by the UE, specifically, the wireless access device may configure a reference signal for the UE, the UE obtains the first CQI representing the quality of the communication channel after measuring the reference signal, and reports the first CQI to the wireless access device, that is, the wireless access device obtains the first CQI reported by the UE; for a TDD (Time division duplex) system, the first CQI obtained by the wireless access device may be reported by the UE, or may be obtained by the wireless access device by itself using channel reciprocity, where a process of obtaining the first CQI reported by the UE by the wireless access device is the same as that of FDD.

It should be noted that CQI is a measure of the communication quality of a wireless communication channel, and can represent a channel measure for a given channel, and usually, a high CQI indicates that a channel has high quality, and vice versa, and the CQI for a channel can be calculated by using performance indicators of the channel, such as signal-to-noise ratio, signal-to-interference-plus-noise ratio, signal-to-noise-and-distortion ratio, and the like.

Optionally, the reference signal configured by the radio access device for the UE may include: CRS (cell specific Reference Signal) or CSI-RS (CSI Reference Signal). Under the version of an LTE protocol R10, when the wireless access equipment configures a transmission mode 9 for the UE, a reference signal configured for the UE by the wireless access equipment and used for CSI measurement is a CSI-RS; in the previous release of R10, the wireless access device may configure the UE with the transmission modes supported by each release, and the reference signal configured for the UE by the wireless access device for CSI measurement is the CRS.

Further, channel reciprocity means that an uplink channel is the same as a downlink channel, that is, information of the downlink channel can be obtained according to information of the uplink channel, and information of the uplink channel can also be obtained according to information of the downlink channel. The uplink channel may be defined as a channel through which the UE sends data to the wireless access device; the downlink channel may be defined as a channel through which the wireless access device transmits data to the UE.

S102, the wireless access equipment determines at least one CQI estimated value according to the first CQI, and each CQI estimated value reflects the state of a channel from one cooperation TP to the UE.

After the wireless access device acquires the first CQI, the wireless access device may determine at least one CQI estimate according to the first CQI, where each CQI estimate reflects a state of a channel from one cooperating TP to the UE.

For example, the previous version of the LTE protocol R9 or R9 only supports the UE reporting a set of CSI to the radio access equipment, where the set of CSI includes one CQI, i.e. the first CQI. In the transmission control method provided by the embodiment of the present invention, the wireless access device may adjust the acquired first CQI to obtain a plurality of CQI estimation values, and select a suitable TP for the UE to perform data transmission according to the first CQI and the plurality of CQI estimation values obtained after adjustment.

S103, the wireless access equipment selects one TP for the UE from a plurality of candidate TPs for data transmission according to the first CQI and the determined at least one CQI estimated value.

After the wireless access device determines the second CQI, i.e., the currently determined CQI estimate, the wireless access device may select one TP from the plurality of candidate TPs for the UE to transmit data according to the first CQI and the determined at least one CQI estimate. Wherein the plurality of candidate TPs includes a serving TP and at least one cooperating TP determined according to the serving TP.

Further, before the wireless access device performs data transmission using the selected TP, that is, before S103, as shown in fig. 2, the method may further include:

s104, the wireless access equipment determines the PMI required by transmission.

After the wireless access device determines at least one CQI estimation value according to the first CQI, the wireless access device may further determine a PMI required for transmission, which is to combat fading of a channel so that a signal may be transmitted more reliably. The UE may report the PMI to the wireless access device, or may not report the PMI to the wireless access device, and when the UE does not report the PMI to the wireless access device, the wireless access device may determine the PMI required for transmission in a specific manner.

Specifically, when the wireless access device obtains the PMI of the selected TP, the wireless access device may use the obtained PMI as a PMI required for transmission; in contrast, when the wireless access device does not obtain the PMI of the selected TP, the wireless access device may determine the PMI required for transmission in a cyclic codebook or a random manner.

And S105, the wireless access equipment determines the RI required by the transmission.

After the wireless access device determines at least one CQI estimate from the first CQI, the wireless access device may also determine an RI required for transmission, which may be used to indicate the number of data streams for parallel transmission that can be supported by the channel. The UE may report the RI to the radio access device, or may not report the RI to the radio access device.

Specifically, when the radio access equipment obtains the RI of the selected TP, the radio access equipment may use the obtained RI as the RI required for transmission; conversely, when the radio access device does not obtain the RI of the selected TP, the radio access device may use the first RI as the RI required for transmission, where the first RI is the RI acquired by the radio access device and corresponding to the serving TP.

It can be understood that, since the value of RI does not change frequently, when the radio access device selects a proper TP for the UE, for the FDD system, if the UE reports RI to the radio access device, the radio access device may report RI to the radio access device as RI required for transmission when performing data transmission; if the radio access equipment does not configure an indication for reporting the RI for the UE, that is, the UE does not report the RI to the radio access equipment, the radio access equipment can take the value of the RI as 1 to serve as the RI required for transmission; if the channel quality between the TP and the UE is poor, the radio access device may also set the value of RI to 1 as the RI required for transmission, and when the value of RI is 1, only one data stream is supported between the TP and the UE for transmission. For the TDD system, if the UE reports the RI to the radio access equipment, the radio access equipment may report the RI, which is reported to the radio access equipment by the UE, as the RI required for transmission when performing data transmission; if the radio access equipment does not configure the indication of reporting the RI for the UE, that is, the UE does not report the RI to the radio access equipment, the radio access equipment may automatically acquire the value of the RI according to the channel reciprocity as the RI required for transmission.

It should be noted that the present invention does not limit the execution sequence of S104 and S105, that is, the present invention may execute S104 first and then execute S105; s105 may be executed first, and then S104 may be executed; s104 and S105 may also be performed simultaneously.

Further, as shown in fig. 3, the step of determining, by the radio access device according to the first CQI, at least one CQI estimation value, that is, S102 specifically includes:

s1021, the wireless access device determines a first SINR (Signal to interference plus Noise Ratio) corresponding to the first CQI.

After the wireless access device acquires the first CQI, the wireless access device may determine a first SINR corresponding to the first CQI. Where SINR is defined as the ratio of the strength of the received desired signal to the strength of the received interfering signals (noise and interference).

Specifically, the wireless access device may determine, according to a preset first mapping table, a first SINR corresponding to the first CQI. The mapping table is defined in the 3GPP protocol, and may be used to indicate a corresponding relationship between CQI and SINR, which is not described herein again.

And S1022, the wireless access device adjusts the first SINR according to the obtained RSRP to obtain a second SINR.

After the wireless access device determines the first SINR, the wireless access device may adjust the first SINR according to the obtained RSRP to obtain a second SINR.

It should be noted that the RSRP acquired by the radio access device includes RSRP corresponding to the candidate TP and RSRP corresponding to the non-candidate TP, and the RSRP may be reported by the UE or may be acquired by the radio access device itself.

Specifically, the process of the wireless access device adjusting the first SINR to obtain the second SINR may be:

when the currently determined CQI estimate reflects a status of a channel from a cooperating TP to the UE, the cooperating TP is made the current TP, and the wireless access device may adjust the first SINR according to the following formula:

to remove RSRP_sSum of all RSRP except.

As will be appreciated by one of ordinary skill in the art, the RSRP described above_DPSTo assume that a cooperative TP is a current TP, the wireless access device acquires RSRP corresponding to the TP,to assume that a cooperative TP is the current TP, the sum of RSRPs corresponding to candidate TPs other than the current TP and non-candidate TPs,

is the sum of RSRPs corresponding to the candidate TPs except the service TP and the non-candidate TPs, namely the sum of RSRPs corresponding to the non-service TP, the RSRP_sRSRP corresponding to the serving TP.

Further, the wireless access device may use each of the cooperating TPs communicating with the UE as a current TP, and adjust the obtained first SINR according to the above formula to obtain SINRs corresponding to the cooperating TPs, that is, a second SINR.

S1023, the wireless access equipment determines a second CQI corresponding to a second SINR, wherein the second CQI is the currently determined CQI estimated value.

After the wireless access device adjusts the first SINR to obtain a second SINR, the wireless access device may determine a second CQI corresponding to the second SINR, where the second CQI is the currently determined CQI estimation value.

It should be noted that the wireless access device may obtain, according to the mapping table and the first CQI, a first SINR corresponding to the first CQI; an adjusted second CQI corresponding to the second SINR, that is, a currently determined CQI estimation value, may also be obtained according to the mapping table and the adjusted second SINR.

Further, as shown in fig. 4, when the radio access device determines the PMI required for transmission, that is, when the radio access device does not obtain the PMI of the selected TP in S104, the radio access device may determine the PMI required for transmission in a cyclic codebook or a random manner according to an index of RBs (Resource Block) occupied by the PDSCH or the number of RBs. The process of determining the PMI by the radio access device in a cyclic codebook or a random manner may specifically include:

s1041, the radio access device determines a cyclic start PMI sequence number of a current TTI (Transmission Time Interval), and determines a PMI required for Transmission corresponding to an index of an RB according to the cyclic start PMI sequence number, the index of the RB, and the number of codebooks, respectively.

When the wireless access equipment does not obtain the PMI of the selected TP, the wireless access equipment can determine the PMI required by transmission in a circulating codebook mode, the wireless access equipment can firstly determine the circulating starting PMI serial number of the current TTI, and then respectively determine the PMI required by transmission corresponding to the index of the RB according to the circulating starting PMI serial number, the index of the RB and the number of codebooks.

Specifically, the wireless access device may be based on the formula P_start= MmodN, determine cycle start PMI sequence number, and according to formula P_i=（P_start+ i) modN, respectively determining PMIs required by transmission corresponding to indexes of RBs, wherein M is the number of times of communication between the UE and the current TP, N is the number of codebooks, Pstart is the cycle start PMI serial number, and P is the number of cyclic start PMIs_iTo transmit the required PMI, i is the index of the RB.

S1042, the wireless access device determines PMIs required by transmission corresponding to the number of RBs through a random mode according to the number of RBs.

When the wireless access device does not obtain the PMI of the selected TP, the wireless access device may determine the PMI required for transmission in a random manner, that is, the wireless access device may determine the PMIs required for transmission corresponding to the number of RBs by a random manner according to the number of RBs.

It should be noted that, when the wireless access device does not obtain the PMI of the selected TP, the wireless access device may determine the PMI required for transmission by performing S1041 or S1042.

Further, the specific process of the radio access equipment selecting a suitable TP for the UE, that is, the CSI is better, is as follows:

the wireless access equipment selects a UE to be scheduled (including a UE corresponding to a service TP, a UE corresponding to a cooperative TP, a TP-free resource and the like) for each cell (TP) through a traversal method in a plurality of cells, so that the wireless access equipment can obtain a combination of resource occupation conditions of a plurality of TPs respectively corresponding to the plurality of cells. After the wireless access device obtains the combination of the resource occupation conditions of the UE in the plurality of TPs respectively corresponding to the plurality of cells, the wireless access device may obtain a functional relationship between the CSI and the throughput (the throughput may also be a spectrum efficiency or a PF (proportional fair) priority), that is, a utility function, according to a second mapping table defined in the LTE protocol. Each combination of resource occupation conditions corresponds to one utility function value, the wireless access device can select the resource occupation condition of the UE represented by the combination with the largest utility function value as a final TP selection result according to the magnitude of the utility function value corresponding to each combination, and the second mapping table can represent a functional relationship between CSI and throughput.

The following illustrates the process of the radio access equipment selecting a suitable TP for the UE, i.e. with better CSI:

for example, assuming that two cells C1 and C2 are included in a cell set, the serving cell of the UE1 and the UE2 is C1, the serving cell of the UE3 is C2, wherein the cooperating cell of the UE1 is C2, the combination of the resource occupancy of the UE in the cell set can be represented as S1= { UE1, UE3}, S2= { UE2, UE3}, S3= { UE2, UE1}, S4= { UE1, UE1 }. The wireless access equipment can obtain a functional relationship between the CSI and the throughput, i.e. a utility function, according to a mapping table defined in the LTE protocol, so that utility function values corresponding to each combination can be obtained as U1, U2, U3, and U4, respectively. Assuming that U3 is the maximum value of the above four values, the final resource occupation of the UE is S3= { UE2, UE1}, that is, the radio access device allocates the resource of C1 to the UE2 and the resource of C2 to the UE1, and further the radio access device can select TPs for communicating with the UE1 and the UE2 according to the resource allocation of the two cells, that is, the radio access device selects TP1 corresponding to cell C1 for the UE2 and selects TP2 corresponding to cell C2 for the UE1, and thus, the radio access device completes the process of selecting TPs for the UE.

The embodiments of the present invention are only exemplarily described by taking DPS decision as an example, and the method for DPB decision is similar to the method for DPS decision, and is not described herein again. Namely, the transmission control method provided by the embodiment of the invention is also suitable for DPB decision.

The embodiment of the invention provides a transmission control method, which comprises the steps of acquiring a first CQI through wireless access equipment, determining at least one CQI estimated value according to the first CQI, and selecting one TP for UE from a plurality of candidate TPs for data transmission according to the at least one CQI estimated value determined by the first CQI, wherein the first CQI reflects the state of a channel serving TP to the UE, and each CQI estimated value reflects the state of a channel cooperating TP to the UE. By the scheme, under the condition that the CQI acquired by the wireless access equipment is limited, the wireless access equipment can obtain a plurality of CQI estimated values of a plurality of candidate TPs to UE which are not acquired by adjusting the acquired CQI, so that the wireless access equipment can synthesize the acquired CQI and the plurality of CQI estimated values obtained after adjustment to select a proper TP for the UE, namely the TP with better CSI and the UE to perform data transmission, and therefore, the DPS technology can be supported, and the compatibility of the DPS technology is improved.

Example two

An embodiment of the present invention provides a transmission control method, taking DPS decision under two sets of CSI acquired by a wireless access device as an example, the method may be used for the wireless access device to select one TP for a UE from a plurality of candidate TPs for data transmission, where the plurality of candidate TPs include a serving TP of the UE, a first cooperating TP, and at least one second cooperating TP, as shown in fig. 5, the method may include:

s201, the wireless access equipment acquires a first CQI, wherein the first CQI reflects the state of a channel serving TP to UE.

For a specific procedure and related description of acquiring the first CQI by the radio access device, reference may be made to the step of S101 and the description thereof in the first embodiment, which are not described herein again.

S202, the wireless access device acquires a second CQI, where the second CQI reflects a state of a channel from the first cooperation TP to the UE.

Before the wireless access equipment communicates with the UE, the wireless access equipment needs to know the quality of a communication channel between the wireless access equipment and the UE, and the wireless access equipment can select a proper TP for the UE to communicate according to the quality of the communication channel. When the wireless access device acquires the first CQI, i.e., the CQI corresponding to the serving TP, the wireless access device may further acquire a second CQI, i.e., the CQI corresponding to the first cooperation TP, where the second CQI may reflect a state of a channel from the first cooperation TP to the UE, i.e., a quality of the channel from the first cooperation TP to the UE.

For example, the LTE protocol R10 version may support the UE reporting two sets of CSI to the wireless access device, where the two sets of CSI reported by the UE to the wireless access device are a set of CSI serving the TP to the UE and a set of CSI cooperating with the TP to the UE, and the two sets of CSI respectively correspond to one CQI, that is, a first CQI and a second CQI. In the transmission control method provided by the embodiment of the present invention, the wireless access device may adjust a first CQI, which is a CQI reflecting a state of a channel from a serving TP to the UE, among the two obtained CQIs to obtain a plurality of CQI estimation values, and select an appropriate TP for the UE for data transmission according to the first CQI, the second CQI, and the plurality of adjusted CQI estimation values.

It should be noted that, for the FDD system, the first CQI and the second CQI are reported to the wireless access device by the UE; for the TDD system, the first CQI and the second CQI may be reported to the wireless access device by the UE, or may be obtained by the wireless access device by using channel reciprocity. Specifically, the process of acquiring the first CQI and the second CQI reported by the UE by the radio access device is the same as the process of acquiring the first CQI reported by the UE by the radio access device described in the first embodiment, and details are not repeated here.

S203, the wireless access device determines at least one CQI estimated value according to the first CQI, and each CQI estimated value reflects the state of a channel from one second cooperation TP to the UE.

After the wireless access device acquires the first CQI and the second CQI, the wireless access device may determine at least one CQI estimation value according to the first CQI, where each CQI estimation value reflects a state of a channel from a second cooperation TP to the UE.

S204, the wireless access equipment selects one TP for the UE from a plurality of candidate TPs for data transmission according to the first CQI, the second CQI and the determined at least one CQI estimated value.

After the wireless access device determines the third CQI, i.e., the currently determined CQI estimate, the wireless access device may select one TP from the plurality of candidate TPs for the UE to transmit data based on the first CQI, the second CQI, and the determined at least one CQI estimate. Wherein the plurality of candidate TPs includes a serving TP, a first cooperating TP, and at least one second cooperating TP determined according to the serving TP.

Further, before the wireless access device performs data transmission using the selected TP, that is, before S204, as shown in fig. 6, the method may further include:

s205, the wireless access equipment determines the PMI required by transmission.

For a specific procedure and related description of determining the PMI required for transmission by the radio access device, reference may be made to the step of S104 and the description thereof, and the steps of S1041 to S1042 and the description thereof in the first embodiment, which are not described herein again.

S206, the wireless access equipment determines the RI needed by the transmission.

For a specific procedure and related description of the radio access equipment determining the RI required for transmission, reference may be made to the step S105 and the description thereof in the first embodiment, and details are not repeated here.

It should be noted that the present invention does not limit the execution sequence of S205 and S206, that is, the present invention may execute S205 first and then execute S206; s206 may be executed first, and then S205 may be executed; s205 and S206 may also be performed simultaneously.

Further, as shown in fig. 7, the step of determining, by the radio access device according to the first CQI, at least one CQI estimation value, that is, S203, specifically includes:

s2031, the wireless access device determines a first SINR corresponding to the first CQI.

For a specific procedure and related description of determining, by the wireless access device, the first SINR corresponding to the first CQI, reference may be made to the step of S1021 in the first embodiment and the description thereof, which are not described herein again.

S2032, the wireless access equipment adjusts the first SINR according to the obtained RSRP to obtain a second SINR.

when the currently determined CQI estimate reflects a state of a channel from a second cooperating TP to the UE, the wireless access device may adjust the first SINR according to the following formula by setting the second cooperating TP to be the current TP:

to remove RSRP_sSum of all RSRP except.

As will be appreciated by one of ordinary skill in the art, the RSRP described above_DPSIn order to assume that a second cooperative TP is a current TP, the wireless access device acquires RSRP corresponding to the TP,to assume that a cooperative TP is the current TP, the sum of RSRPs corresponding to candidate TPs other than the current TP and non-candidate TPs,

S2033, the wireless access device determines a third CQI corresponding to the second SINR, where the third CQI is a currently determined CQI estimation value.

After the wireless access device adjusts the first SINR to obtain a second SINR, the wireless access device may determine a third CQI corresponding to the second SINR, where the third CQI is the currently determined CQI estimation value.

It should be noted that the wireless access device may obtain, according to the mapping table and the first CQI, a first SINR corresponding to the first CQI; an adjusted third CQI corresponding to the second SINR, that is, a currently determined CQI estimation value, may also be obtained according to the mapping table and the adjusted second SINR.

The following procedure for the radio access equipment to select a suitable TP for the UE, i.e. with better CSI, is illustrated:

The embodiment of the invention provides a transmission control method, which comprises the steps of acquiring a first CQI and a second CQI through wireless access equipment, determining at least one CQI estimated value according to the first CQI, and selecting one TP for UE from a plurality of candidate TPs for data transmission according to the first CQI, the second CQI and the determined at least one CQI estimated value, wherein the first CQI reflects the state of a channel serving TP to the UE, the second CQI reflects the state of the channel from the first cooperation TP to the UE, and each CQI estimated value reflects the state of a channel from the second cooperation TP to the UE. By the scheme, under the condition that the CQI acquired by the wireless access equipment is limited, the wireless access equipment can obtain a plurality of CQI estimated values of a plurality of candidate TPs to UE which are not acquired by adjusting the acquired CQI, so that the wireless access equipment can synthesize the acquired CQI and the plurality of CQI estimated values obtained after adjustment to select a proper TP for the UE, namely the TP with better CSI and the UE to perform data transmission, and therefore, the DPS technology can be supported, and the compatibility of the DPS technology is improved.

EXAMPLE III

An embodiment of the present invention provides a transmission control method, taking JT decision under a set of CSI acquired by a wireless access device as an example, the method may be used for the wireless access device to select a TP group for a UE from a plurality of candidate TPs for data transmission, where the plurality of candidate TPs include a serving TP and at least one cooperating TP of the UE, as shown in fig. 8, the method may include:

s301, the wireless access device acquires a first CQI, wherein the first CQI reflects the state of a channel serving the TP to the UE.

For a specific procedure and related description of acquiring the first CQI, reference may be made to the step of S101 and the description thereof in the first embodiment, and details are not repeated here.

S302, the wireless access device determines at least one CQI estimated value according to the first CQI, wherein each CQI estimated value reflects the state of an equivalent channel from a TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission.

After the wireless access device acquires the first CQI, the wireless access device may determine at least one CQI estimation value according to the first CQI, where each CQI estimation value reflects a state of an equivalent channel from one TP group to the UE, and the TP group includes candidate TPs for joint transmission by multiple users, where one TP group includes at least two TPs.

For example, the previous version of the LTE protocol R9 or R9 only supports the UE reporting a set of CSI to the radio access equipment, where the set of CSI includes one CQI, i.e. the first CQI. In the transmission control method provided by the embodiment of the present invention, the wireless access device may obtain a plurality of CQI estimation values by adjusting the obtained first CQI, and select an appropriate TP group for the UE to perform data transmission according to the first CQI and the plurality of CQI estimation values obtained after adjustment.

S303, the wireless access equipment selects a TP group for the UE from a plurality of candidate TPs for data transmission according to the first CQI and the determined at least one CQI estimated value.

After the wireless access device determines the second CQI, i.e., the currently determined CQI estimate, the wireless access device may select a TP group for the UE for data transmission from a plurality of candidate TPs according to the first CQI and the determined at least one CQI estimate. Wherein the plurality of candidate TPs includes a serving TP and at least one cooperating TP determined according to the serving TP.

Further, before the wireless access device performs data transmission using the selected TP, that is, before S303, as shown in fig. 9, the method may further include:

s304, the wireless access equipment determines the PMI required by transmission.

S305, the wireless access device determines an RI required for transmission.

For a specific procedure and related description of the process of determining the RI required for transmission by the radio access equipment, reference may be made to the step of S105 and the description thereof in the first embodiment, which are not described herein again.

Further, as shown in fig. 10, the step of determining, by the radio access device according to the first CQI, at least one CQI estimation value, that is, S302, specifically includes:

s3021, the wireless access device determines a first SINR corresponding to the first CQI.

And S3022, the wireless access device adjusts the first SINR according to the obtained RSRP to obtain a second SINR.

when the currently determined CQI estimation value reflects a state of an equivalent channel from a TP group to the UE, the TP group is made to be the current TP group, and the wireless access device may adjust the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

to remove RSRP_sSum of all RSRP except.

As will be appreciated by one of ordinary skill in the art, the aboveThe RSRP_JTIn order to assume that a TP group is a current TP group, the wireless access device acquires RSRP corresponding to the TP group,

in order to assume that a TP group is the current TP group, the sum of RSRPs corresponding to candidate TPs other than the TPs included in the current TP group and non-candidate TPs,

the RSRP sum corresponding to the candidate TP except the service TP and the non-candidate TP, that is, the RSRP sum corresponding to the non-service TP, and the RSRP is the RSRP corresponding to the service TP.

Further, the wireless access device may use the TP groups communicated with the UE as current TP groups, and adjust the obtained first SINR according to the above formula to obtain SINRs corresponding to the TP groups, that is, second SINRs.

S3023, the wireless access device determines a second CQI corresponding to a second SINR, where the second CQI is a currently determined CQI estimation value.

For a specific process and related description of the wireless access device determining the second CQI corresponding to the second SINR, reference may be made to the step S1023 in the first embodiment and the description thereof, which is not repeated herein.

Further, the process of the radio access device selecting a suitable TP group for the UE, that is, the CSI is better, is specifically as follows:

the wireless access equipment selects a UE to be scheduled (including a UE corresponding to a service TP, a UE corresponding to a cooperative TP, a TP-free resource and the like) for each cell (TP) through a traversal method in a plurality of cells, so that the wireless access equipment can obtain a combination of resource occupation conditions of a plurality of TPs respectively corresponding to the plurality of cells. After the wireless access device obtains the combination of the resource occupation conditions of the UE in the plurality of TPs respectively corresponding to the plurality of cells, the wireless access device may obtain a functional relationship between the CSI and the throughput (the throughput may also be a spectrum efficiency or a PF (proportional fair) priority), that is, a utility function, according to a second mapping table defined in the LTE protocol. Each combination of resource occupation conditions corresponds to one utility function value, the wireless access equipment can select the resource occupation condition of the same UE represented by the combination with the maximum utility function value as a final TP group selection result according to the size of the utility function value corresponding to each combination, and the second mapping table can represent a function relation between CSI and throughput.

The following procedure for the radio access equipment to select a suitable TP group for the UE, i.e. with better CSI, is illustrated:

for example, assuming that two cells C1 and C2 are included in a cell set, the serving cell of the UE1 and the UE2 is C1, the serving cell of the UE3 is C2, wherein the cooperating cell of the UE1 is C2, the combination of the resource occupancy of the UE in the cell set can be represented as S1= { UE1, UE3}, S2= { UE2, UE3}, S3= { UE2, UE1}, S4= { UE1, UE1 }. The wireless access equipment can obtain a functional relationship between the CSI and the throughput, i.e. a utility function, according to a mapping table defined in the LTE protocol, so that utility function values corresponding to each combination can be obtained as U1, U2, U3, and U4, respectively. Assuming that U4 is the maximum value of the above four values, the final resource occupation of the UE is S4= { UE1, UE1}, that is, the radio access device allocates the resource of C1 to the UE1 and the resource of C2 to the UE1, and further the radio access device can select one TP group for communicating with the UE1 according to the above two cell resource allocations, that is, the radio access device selects TP1 corresponding to the cell C1 and TP2 corresponding to the cell C2 for the UE1, so that the UE1 can perform data transmission with the TP group consisting of TP1 and TP2, and thus, the radio access device completes the process of selecting the TP group for the UE.

In the embodiment of the invention, for JT obtained by wireless access equipment under two groups of CSI, at least one CQI estimated value is obtained by adjustment by using CQI corresponding to the service TP, so that one TP group is selected for UE to perform data transmission according to two CQIs contained in the two groups of CSI obtained by the wireless access equipment and the at least one CQI estimated value obtained by adjustment. Similar to this embodiment, the specific process for acquiring JT under two sets of CSI by the radio access device is not described here again.

The embodiment of the invention provides a transmission control method, which comprises the steps of acquiring a first CQI through wireless access equipment, determining at least one CQI estimated value according to the first CQI, and selecting a TP group for UE from a plurality of candidate TPs for data transmission according to the first CQI and the determined at least one CQI estimated value, wherein the first CQI reflects the state of a channel serving TP to the UE, each CQI estimated value reflects the state of an equivalent channel from one TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission. According to the scheme, under the condition that the CQI acquired by the wireless access equipment is limited, the wireless access equipment can obtain a plurality of CQI estimated values of a plurality of candidate TPs to UE which are not acquired by adjusting the acquired CQI, so that the wireless access equipment can synthesize the acquired CQI and the plurality of CQI estimated values obtained after adjustment to select a proper TP group for the UE, namely the TP group with better CSI, namely the TP group with better CQI to perform data transmission with the UE, and therefore the wireless access equipment can support the JT technology, and the compatibility of the JT technology is improved.

Example four

As shown in fig. 11, an embodiment of the present invention provides a wireless access device 1, which corresponds to a transmission control method for a wireless access device to acquire DPS/DPB and JT under a set of CSI, and is configured to select at least one TP for a UE from multiple candidate TPs to perform data transmission, where the multiple candidate TPs include a serving TP and at least one cooperating TP of the UE, and the wireless access device 1 may include:

an obtaining unit 10, configured to obtain a first CQI, where the first CQI reflects a state of a channel serving a TP to a UE.

A determining unit 11, configured to determine at least one CQI estimation value according to the first CQI acquired by the acquiring unit 10, where each CQI estimation value reflects a state of a channel from one coordinated TP to the UE or reflects a state of an equivalent channel from a TP group to the UE, where the TP group includes a plurality of candidate TPs for joint transmission.

A selecting unit 12, configured to select one TP or one TP group for the UE from the multiple candidate TPs for data transmission according to the first CQI acquired by the acquiring unit 10 and at least one CQI estimation value determined by the determining unit 11.

Optionally, the determining unit 11 is specifically configured to determine a first SINR corresponding to the first CQI obtained by the obtaining unit 10, adjust the first SINR according to the RSRP obtained by the obtaining unit 10 to obtain a second SINR, and determine a second CQI corresponding to the second SINR, where the second CQI is a currently determined CQI estimation value.

Optionally, the determining unit 11 is specifically configured to, when the currently determined CQI estimation value reflects a state of a channel from one coordinated TP to the UE, make the coordinated TP be the current TP, and adjust the first SINR according to the following formula:

to remove RSRP_sSum of all RSRP except.

Optionally, the determining unit 11 is specifically configured to, when the currently determined CQI estimation value reflects a state of an equivalent channel from a TP group to the UE, make the TP group be the current TP group, and adjust the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

Optionally, the determining unit 11 is further configured to determine a PMI required for transmission before data transmission is performed by using the TP or the TP group selected by the selecting unit 12; wherein, the determining unit 11 is specifically configured to, when the obtaining unit 10 obtains the PMI of the selected TP or TP group, use the obtained PMI as the PMI required for the transmission; or the determining unit 11 is specifically configured to determine the PMI required for the transmission in a cyclic codebook or a random manner when the obtaining unit 10 does not obtain the PMI of the selected TP or TP group.

Optionally, the determining unit 11 is specifically configured to determine the PMI required for transmission in a cyclic codebook manner or a random manner according to an index of an RB occupied by the PDSCH or the number of RBs.

Optionally, the determining unit 11 is specifically configured to determine a cyclic start PMI sequence number of the current TTI, and determine, according to the cyclic start PMI sequence number, the index of the RB, and the number of codebooks, a PMI required for transmission corresponding to the index of the RB, respectively; or, the determining unit 11 is specifically configured to determine, according to the number of RBs, PMIs required for the transmission respectively corresponding to the number of RBs in a random manner.

Optionally, the determining unit 11 is specifically configured to determine according to a formula P_start= MmodN, determining the cycle start PMI serial number, wherein M is the number of times that the current TP sends data to the UE, N is the number of codebooks, P is_startPMI sequence number for the cycle start and according to formula P_i=（P_start+ i) modN, respectively determining PMIs required for the transmission corresponding to the indexes of the RBs, wherein P_iI is an index of the RB for the PMI required for the transmission.

Optionally, the determining unit 11 is further configured to determine an RI required for transmission before performing data transmission using the TP or the TP group selected by the selecting unit 12; the determining unit 11 is specifically configured to, when the obtaining unit 10 obtains the RI of the selected TP or TP group, use the obtained RI as the RI required for the transmission; or the determining unit 11 is specifically configured to, when the obtaining unit 10 does not obtain the RI of the selected TP or the TP group, use a first RI as the RI required for the transmission, where the first RI is the RI of the service TP obtained by the obtaining unit 10.

The acquiring unit 10 may be a separate processor, or may be implemented by being integrated into a certain processor of the base station, or may be stored in a memory of the base station in the form of program codes, and the certain processor of the base station may call and execute the above functions of the acquiring unit 10. The determination unit 11 and the selection unit 12 are implemented together with the acquisition unit 10 and may be integrated with the acquisition unit 10 or may be implemented separately. The processor described herein 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.

The embodiment of the invention provides a wireless access device, which acquires a first CQI, determines at least one CQI estimated value according to the first CQI, and selects one TP or one TP group for a UE from a plurality of candidate TPs for data transmission according to the first CQI and the determined at least one CQI estimated value, wherein the first CQI reflects the state of a channel serving the TP to the UE, each CQI estimated value reflects the state of a channel cooperating with the TP to the UE, or reflects the state of an equivalent channel from one TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission. By the scheme, under the condition that the CQI acquired by the wireless access equipment is limited, the wireless access equipment can obtain a plurality of CQI estimated values of a plurality of candidate TPs to UE which are not acquired by adjusting the acquired CQI, so that the wireless access equipment can synthesize the acquired CQI and the plurality of CQI estimated values obtained after adjustment to select a proper TP or TP group for the UE, namely the TP or TP group with better CSI, to perform data transmission with the UE, and therefore, the wireless access equipment can support DPS/DPB and JT technologies, and the compatibility of the DPS/DPB and JT technologies is improved.

As shown in fig. 12, an embodiment of the present invention further provides a wireless access device 2, which corresponds to a transmission control method for a wireless access device to acquire DPS/DPB and JT under two sets of CSI, and is configured to select at least one TP for a UE from multiple candidate TPs to perform data transmission, where the multiple candidate TPs include a serving TP, a first cooperating TP, and at least one second cooperating TP of the UE, and the wireless access device 2 may include:

an obtaining unit 20, configured to obtain a first CQI and a second CQI, where the first CQI reflects a state of a channel from a serving TP to a UE, and the second CQI reflects a state of a channel from a first cooperating TP to the UE.

A determining unit 21, configured to determine at least one CQI estimation value according to the first CQI acquired by the acquiring unit 20, where each CQI estimation value reflects a state of a channel from a second coordinated TP to the UE or reflects a state of an equivalent channel from a TP group to the UE, where the TP group includes a plurality of candidate TPs for joint transmission.

A selecting unit 22, configured to select one TP or one TP group for data transmission for the UE from the multiple candidate TPs according to the first CQI acquired by the acquiring unit 20, the second CQI, and at least one CQI estimation value determined by the determining unit 21.

Optionally, the determining unit 21 is specifically configured to determine a first SINR corresponding to the first CQI obtained by the obtaining unit 20, adjust the first SINR according to the RSRP obtained by the obtaining unit 20 to obtain a second SINR, and determine a third CQI corresponding to the second SINR, where the third CQI is a currently determined CQI estimation value.

Optionally, the determining unit 21 is specifically configured to, when the currently determined CQI estimation value reflects a state of a channel from a second cooperative TP to the UE, make the second cooperative TP be the current TP, and adjust the first SINR according to the following formula:

to remove RSRP_sSum of all RSRP except.

Optionally, the determining unit 21 is specifically configured to, when the currently determined CQI estimation value reflects a state of an equivalent channel from a TP group to the UE, make the TP group be the current TP group, and adjust the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,to removeSum of all RSRPs except the RSRP corresponding to idle TP, RSRP_sFor the RSRP corresponding to the serving TP,

to remove RSRP_sSum of all RSRP except.

Optionally, the determining unit 21 is further configured to determine a PMI required for transmission before data transmission is performed by using the TP or the TP group selected by the selecting unit 22; wherein, the determining unit 21 is specifically configured to, when the obtaining unit 20 obtains the PMI of the selected TP or TP group, use the obtained PMI as the PMI required for the transmission; or the determining unit 21 is specifically configured to determine the PMI required for the transmission in a cyclic codebook or a random manner when the obtaining unit 20 does not obtain the PMI of the selected TP or TP group.

Optionally, the determining unit 21 is specifically configured to determine the PMI required for transmission in a cyclic codebook manner or a random manner according to an index of an RB occupied by the PDSCH or the number of RBs.

Optionally, the determining unit 21 is specifically configured to determine a cyclic start PMI sequence number of the current TTI, and determine, according to the cyclic start PMI sequence number, the index of the RB, and the number of codebooks, a PMI required for transmission corresponding to the index of the RB, respectively; alternatively, the determining unit 21 is specifically configured to determine, according to the number of RBs, PMIs required for the transmission respectively corresponding to the number of RBs in a random manner.

Optionally, the determining unit 21 is specifically configured to determine according to formula P_start= MmodN, determining the cycle start PMI serial number, wherein M is the number of times that the current TP sends data to the UE, N is the number of codebooks, P is_startPMI sequence number for the cycle start and according to formula P_i=（P_start+ i) modN, respectively determining PMIs required for the transmission corresponding to the indexes of the RBs, wherein P_iI is an index of the RB for the PMI required for the transmission.

Optionally, the determining unit 21 is further configured to determine an RI required for transmission before performing data transmission using the TP or the TP group selected by the selecting unit 22; the determining unit 21 is specifically configured to, when the obtaining unit 20 obtains the RI of the selected TP or TP group, use the obtained RI as the RI required for the transmission; or the determining unit 21 is specifically configured to, when the obtaining unit 20 does not obtain the RI of the selected TP or the TP group, use a first RI as the RI required for the transmission, where the first RI is the RI of the obtained serving TP.

Optionally, the wireless access device provided in the embodiment of the present invention may include a base station, a base station controller, a radio network controller, and the like.

It should be noted that the obtaining unit 20 may be a processor separately set up, or may be implemented by being integrated into a certain processor of the base station, or may be stored in a memory of the base station in the form of program codes, and the certain processor of the base station may call and execute the above functions of the obtaining unit 20. The determination unit 21 and the selection unit 22 are implemented together with the acquisition unit 20 and may be integrated with the acquisition unit 20 or may be implemented separately. The processor described herein may be a central processing unit, or a specific integrated circuit, or one or more integrated circuits configured to implement embodiments of the present invention.

The embodiment of the invention provides a wireless access device, which acquires a first CQI and a second CQI, determines at least one CQI estimated value according to the first CQI, and selects one TP or one TP group for a UE from a plurality of candidate TPs for data transmission according to the first CQI, the second CQI and the determined at least one CQI estimated value, wherein the first CQI reflects the state of a channel serving a TP to the UE, the second CQI reflects the state of the channel serving the first coordinated TP to the UE, each CQI estimated value reflects the state of a channel from one second coordinated TP to the UE, or reflects the state of an equivalent channel from one TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission. By the scheme, under the condition that the CQI acquired by the wireless access equipment is limited, the wireless access equipment can obtain a plurality of CQI estimated values of a plurality of candidate TPs to UE which are not acquired by adjusting the acquired CQI, so that the wireless access equipment can synthesize the acquired CQI and the plurality of CQI estimated values obtained after adjustment to select a proper TP or TP group for the UE, namely the TP or TP group with better CSI, to perform data transmission with the UE, and therefore, the wireless access equipment can support DPS/DPB and JT technologies, and the compatibility of the DPS/DPB and JT technologies is improved.

EXAMPLE five

As shown in fig. 13, an embodiment of the present invention provides a wireless access device, which corresponds to a transmission control method for a wireless access device to acquire DPS/DPB and JT under a set of CSI, and is configured to select at least one TP for a UE from multiple candidate TPs for data transmission, where the multiple candidate TPs include a serving TP and at least one cooperating TP of the UE, and the wireless access device may include a transmitter 14, a receiver 15, a processor 16, and a memory 17, where the transmitter 14, the receiver 15, and the memory 17 are all connected to the processor 16, and may be connected through a bus, for example. Of course, the base station may further include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, and the embodiments of the present invention are not limited in any way here.

The receiver 15 and the transmitter 14 may be integrated together to form a transceiver.

The memory 17 is used to store executable program code, which includes computer operating instructions. The memory 17 may comprise a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

Processor 16 may be a central processing unit, or a particular integrated circuit, or one or more integrated circuits configured to implement embodiments of the present invention.

Specifically, the processor 16 may be configured to obtain a first CQI, determine at least one CQI estimation value according to the first CQI, and select one TP or one TP group for the UE from the plurality of candidate TPs for data transmission according to the first CQI and the determined at least one CQI estimation value, where the first CQI reflects a state of a channel serving a TP to the UE, and each CQI estimation value reflects a state of a channel cooperating with the TP to the UE, or reflects a state of an equivalent channel from one TP group to the UE, and the TP group includes a plurality of candidate TPs for joint transmission; the memory 17 may be configured to store a software code of the first CQI and a software program that controls the wireless access device to perform the above process, so that the processor 16 performs the above process by executing the above software program and calling the above software code.

Optionally, the processor 16 is specifically configured to determine a first SINR corresponding to the first CQI, adjust the first SINR according to the obtained RSRP to obtain a second SINR, and determine a second CQI corresponding to the second SINR, where the second CQI is a currently determined CQI estimation value.

Optionally, the processor 16 is specifically configured to, when the currently determined CQI estimation value reflects a state of a channel from one coordinated TP to the UE, make the coordinated TP be the current TP, and adjust the first SINR according to the following formula:

to remove RSRP_sSum of all RSRP except.

Optionally, the processor 16 is specifically configured to, when the currently determined CQI estimation value reflects a state of an equivalent channel from a TP group to the UE, make the TP group be the current TP group, and adjust the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

to remove RSRP_sSum of all RSRP except.

Optionally, the processor 16 is further configured to determine a PMI required for transmission before data transmission is performed using the selected TP or TP group; wherein, the processor 16 is specifically configured to, when obtaining the PMI of the selected TP or TP group, use the obtained PMI as a PMI required for the transmission; or the processor 16, is specifically configured to determine the PMI required for the transmission in a cyclic codebook or a random manner when the PMI of the selected TP or TP group is not obtained.

Optionally, the processor 16 is specifically configured to determine the PMI required for transmission in a cyclic codebook manner or a random manner according to an index of an RB occupied by the PDSCH or the number of RBs.

Optionally, the processor 16 is specifically configured to determine a cyclic start PMI sequence number of the current TTI, and determine, according to the cyclic start PMI sequence number, the index of the RB, and the number of codebooks, a PMI required for transmission corresponding to the index of the RB, respectively; or, the processor 16 is specifically configured to determine, according to the number of RBs, PMIs required for transmission respectively corresponding to the number of RBs in a random manner.

Optionally, the processor 16 is specifically configured to calculate the formula P_start= MmodN, determining the cycle start PMI serial number, wherein M is the number of times that the current TP sends data to the UE, N is the number of codebooks, P is_startInitiating PMI order for the cycleNumber and according to formula P_i=（P_start+ i) modN, respectively determining PMIs required for the transmission corresponding to the indexes of the RBs, wherein P_iI is an index of the RB for the PMI required for the transmission.

Optionally, the processor 16 is further configured to determine an RI required for transmission before data transmission using the selected TP or TP group; wherein, the processor 16 is specifically configured to, when an RI of a selected TP or TP group is obtained, take the obtained RI as an RI required for the transmission; or the processor 16 is specifically configured to, when the RI of the selected TP or TP group is not obtained, use a first RI as the RI required for the transmission, where the first RI is the RI of the acquired serving TP.

As shown in fig. 14, an embodiment of the present invention further provides a wireless access device, which corresponds to a transmission control method for a wireless access device to acquire DPS/DPB and JT under two sets of CSI, and is configured to select at least one TP for a UE from a plurality of candidate TPs including a serving TP, a first cooperating TP, and at least one second cooperating TP of the UE for data transmission, where the wireless access device may include a transmitter 24, a receiver 25, a processor 26, and a memory 27, where the transmitter 24, the receiver 25, and the memory 27 are all connected to the processor 26, and may be connected through a bus, for example. Of course, the base station may further include general components such as an antenna, a baseband processing component, a medium radio frequency processing component, and an input/output device, and the embodiments of the present invention are not limited in any way here.

The receiver 25 and the transmitter 24 may be integrated together to form a transceiver.

The memory 27 is used to store executable program code, which includes computer operating instructions. The memory 27 may comprise high-speed RAM memory, and may also include non-volatile memory, such as at least one disk memory.

Processor 26 may be a central processing unit, or a particular integrated circuit, or one or more integrated circuits configured to implement embodiments of the present invention.

Specifically, the processor 26 may be configured to obtain a first CQI and a second CQI, determine at least one CQI estimation value according to the first CQI, and select one TP or one TP group for the UE for data transmission from the multiple candidate TPs according to the first CQI, the second CQI, and the determined at least one CQI estimation value, where the first CQI reflects a state of a channel serving a TP to the UE, the second CQI reflects a state of a channel of a first coordinated TP to the UE, each CQI estimation value reflects a state of a channel of a second coordinated TP to the UE, or reflects a state of an equivalent channel of one TP group to the UE, and the TP group includes multiple candidate TPs for joint transmission; the memory 27 may be configured to store a software code of the first CQI, a software code of the second CQI, and a software program that controls the wireless access device to perform the above-mentioned processes, so that the processor 26 performs the above-mentioned processes by executing the software program and calling the software code.

Optionally, the processor 26 is specifically configured to determine a first SINR corresponding to the first CQI, adjust the first SINR according to the obtained RSRP to obtain a second SINR, and determine a third CQI corresponding to the second SINR, where the third CQI is a currently determined CQI estimation value.

Optionally, the processor 26 is specifically configured to, when the currently determined CQI estimation value reflects a state of a channel from a second cooperative TP to the UE, make the second cooperative TP be the current TP, and adjust the first SINR according to the following formula:

wherein, the SINR_DPSIs the second SINR, SINR_sIs the first SINR, RSRP_DPSThe RSRP corresponding to the current TP,to remove RSRP_DPSSum of all RSRPs except RSRP_sFor the RSRP corresponding to the serving TP,

to remove RSRP_sSum of all RSRP except.

Optionally, the processor 26 is specifically configured to, when the currently determined CQI estimation value reflects a state of an equivalent channel from a TP group to the UE, make the TP group be the current TP group, and adjust the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

Optionally, the processor 26 is further configured to determine a PMI required for transmission before data transmission is performed using the selected TP or TP group; wherein, the processor 26 is specifically configured to, when a PMI of a selected TP or TP group is obtained, use the obtained PMI as a PMI required for the transmission; or the processor 26, is specifically configured to determine the PMI required for the transmission in a cyclic codebook or a random manner when the PMI of the selected TP or TP group is not obtained.

Optionally, the processor 26 is specifically configured to determine the PMI required for transmission in a cyclic codebook manner or a random manner according to an index of an RB occupied by the PDSCH or the number of RBs.

Optionally, the processor 26 is specifically configured to determine a cyclic start PMI sequence number of the current TTI, and determine, according to the cyclic start PMI sequence number, the index of the RB, and the number of codebooks, a PMI required for transmission corresponding to the index of the RB, respectively; or, the processor 26 is specifically configured to determine, according to the number of RBs, PMIs required for the transmission respectively corresponding to the number of RBs in a random manner.

Optionally, the processor 26 is specifically configured to calculate the formula P_start= MmodN, determining the cycle start PMI serial number, wherein M is the number of times that the current TP sends data to the UE, N is the number of codebooks, P is_startPMI sequence number for the cycle start and according to formula P_i=（P_start+ i) modN, respectively determining PMIs required for the transmission corresponding to the indexes of the RBs, wherein P_iI is an index of the RB for the PMI required for the transmission.

Optionally, the processor 26 is further configured to determine an RI required for transmission before data transmission using the selected TP or TP group; wherein, the processor 26 is specifically configured to, when an RI of a selected TP or TP group is obtained, take the obtained RI as an RI required for the transmission; or the processor 26 is specifically configured to, when the RI of the selected TP or TP group is not obtained, use a first RI as the RI required for the transmission, where the first RI is the RI of the acquired serving TP.

EXAMPLE six

As shown in fig. 15, an embodiment of the present invention provides a transmission control system, including:

the radio access device according to embodiment four or embodiment five, and the UE performing data transmission with the radio access device.

The transmission control system provided in the embodiment of the present invention corresponds to a method for performing DPS or JT transmission control when a wireless access device acquires a set of CSI, and a method for performing DPS or JT transmission control when a wireless access device acquires two sets of CSI.

When the wireless access device obtains a set of CSI, the wireless access device may specifically complete the following processes:

the wireless access equipment acquires a first CQI, determines at least one CQI estimated value according to the first CQI, and selects one TP or one TP group for the UE from a plurality of candidate TPs for data transmission according to the first CQI and the determined at least one CQI estimated value, wherein the first CQI reflects the state of a channel from a service TP to the UE, each CQI estimated value reflects the state of a channel from a cooperation TP to the UE, or reflects the state of an equivalent channel from one TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission. By the scheme, under the condition that the CQI acquired by the wireless access equipment is limited, the wireless access equipment can obtain a plurality of CQI estimated values of a plurality of candidate TPs to UE which are not acquired by adjusting the acquired CQI, so that the wireless access equipment can synthesize the acquired CQI and the plurality of CQI estimated values obtained after adjustment to select a proper TP or TP group for the UE, namely the TP or TP group with better CSI, to perform data transmission with the UE, and therefore, the DPS or JT technology can be supported, and the compatibility of the DPS or JT technology is improved.

When the wireless access device obtains the two sets of CSI, the wireless access device may specifically complete the following processes:

the wireless access equipment acquires a first CQI and a second CQI, determines at least one CQI estimated value according to the first CQI, and selects one TP or one TP group for the UE from a plurality of candidate TPs for data transmission according to the first CQI, the second CQI and the determined at least one CQI estimated value, wherein the first CQI reflects the state of a channel serving the TP to the UE, the second CQI reflects the state of a channel of a first cooperation TP to the UE, each CQI estimated value reflects the state of a channel of a second cooperation TP to the UE, or reflects the state of an equivalent channel of one TP group to the UE, and the TP group comprises a plurality of candidate TPs for joint transmission. By the scheme, under the condition that the CQI acquired by the wireless access equipment is limited, the wireless access equipment can obtain a plurality of CQI estimated values of a plurality of candidate TPs to UE which are not acquired by adjusting the acquired CQI, so that the wireless access equipment can synthesize the acquired CQI and the plurality of CQI estimated values obtained after adjustment to select a proper TP or TP group for the UE, namely the TP or TP group with better CSI, to perform data transmission with the UE, and therefore, the DPS or JT technology can be supported, and the compatibility of the DPS or JT technology is improved.

It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working processes of the system, the apparatus and the unit described above, reference may be made to the corresponding processes in the foregoing method embodiments, and details are not described here again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A transmission control method for a wireless access device to select at least one TP for a User Equipment (UE) from a plurality of candidate Transmission Points (TPs), the plurality of candidate TPs comprising a serving TP and at least one cooperating TP for the UE, the method comprising:

2. The transmission control method of claim 1, wherein the process for the wireless access device to determine each CQI estimate comprises:

3. The transmission control method according to claim 2, wherein when the currently determined CQI estimate reflects a status of a channel from a cooperating TP to the UE, the cooperating TP is made to be the current TP, and the wireless access device adjusts the first SINR according to the following formula:

to remove RSRP_sSum of all RSRP except.

4. The transmission control method according to claim 2, wherein when the currently determined CQI estimate reflects a state of an equivalent channel from a TP group to the UE, the TP group is made to be the current TP group, and the wireless access device adjusts the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

to remove RSRP_sSum of all RSRP except.

5. The transmission control method according to any one of claims 1 to 4, wherein before the wireless access device performs data transmission using the selected TP or TP group, the method further comprises:

6. The transmission control method according to claim 5, wherein the determining, by the radio access device, the PMI required for transmission in a cyclic codebook or a random manner specifically includes:

7. The method as claimed in claim 6, wherein the determining, by the radio access device, the PMI required for transmission in a cyclic codebook manner or a random manner according to the index of the RB occupied by the PDSCH or the number of RBs by the PDSCH specifically comprises:

or,

8. The method according to claim 6 or 7, wherein the determining, by the radio access device, a cycle start PMI sequence number of a current TTI and determining, according to the cycle start PMI sequence number, the index of the RB, and a number of codebooks, the PMI required for transmission corresponding to the index of the RB respectively comprises:

9. The transmission control method according to any one of claims 2 to 8, wherein before the wireless access device performs data transmission using the selected TP or TP group, the method further comprises:

10. A transmission control method for a wireless access device to select at least one TP for a UE for data transmission from a plurality of candidate TPs, the plurality of candidate TPs including a serving TP for the UE, a first cooperating TP, and at least one second cooperating TP, the method comprising:

11. The transmission control method of claim 10, wherein the process for the wireless access device to determine each CQI estimate comprises:

12. The transmission control method of claim 11, wherein when the currently determined CQI estimate reflects a status of a channel from a second cooperating TP to the UE, the second cooperating TP is set as the current TP, and the wireless access device adjusts the first SINR according to the following formula:

13. The transmission control method according to claim 11, wherein when the currently determined CQI estimate reflects a state of an equivalent channel from a TP group to the UE, the TP group is set as the current TP group, and the wireless access device adjusts the first SINR according to the following formula:

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

to remove RSRP_sSum of all RSRP except.

14. The transmission control method according to any one of claims 10 to 13, wherein before the wireless access device performs data transmission using the selected TP or TP group, the method further comprises:

15. The method of claim 14, wherein the determining, by the radio access device, the PMI required for transmission in a cyclic codebook or a random manner specifically includes:

16. The method of claim 15, wherein the determining, by the radio access device, the PMI required for transmission in a cyclic codebook manner or a random manner according to an index of an RB occupied by the PDSCH or the number of RBs specifically comprises:

or,

17. The method according to claim 15 or 16, wherein the radio access device determines a cycle start PMI sequence number of a current TTI, and determines the PMI required for transmission corresponding to an index of the RB according to the cycle start PMI sequence number, the index of the RB, and a number of codebooks, respectively, specifically includes:

18. The transmission control method according to any one of claims 11 to 17, wherein before the wireless access device performs data transmission using the selected TP or TP group, the method further comprises:

19. A wireless access device configured to select at least one TP for a UE for data transmission from a plurality of candidate TPs, the plurality of candidate TPs including a serving TP and at least one cooperating TP for the UE, the wireless access device comprising:

20. The wireless access device of claim 19,

the determining unit is specifically configured to determine a first SINR corresponding to the first CQI obtained by the obtaining unit, adjust the first SINR according to the RSRP obtained by the obtaining unit to obtain a second SINR, and determine a second CQI corresponding to the second SINR, where the second CQI is a currently determined CQI estimation value.

21. The wireless access device of claim 20,

to remove RSRP_sSum of all RSRP except.

22. The wireless access device of claim 20,

wherein, the SINR_JTIs the second SINR, SINR_sIn order to achieve the first SINR,is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

23. The wireless access device according to any one of claims 19 to 22,

24. The wireless access device of claim 23,

25. The wireless access device of claim 24,

or,

26. The wireless access device of claim 24 or 25,

27. The wireless access device of any one of claims 20 to 26,

28. A wireless access device configured to select at least one TP for a UE for data transmission from a plurality of candidate TPs, the plurality of candidate TPs including a serving TP for the UE, a first cooperating TP, and at least one second cooperating TP, the wireless access device comprising:

29. The wireless access device of claim 28,

30. The wireless access device of claim 29,

31. The wireless access device of claim 29,

is the sum of RSRPs corresponding to candidate TPs within the current TP group,

to remove

to remove RSRP_sSum of all RSRP except.

32. The wireless access device of any one of claims 28 to 31,

33. The wireless access device of claim 32,

34. The wireless access device of claim 33,

or,

35. The wireless access device of claim 33 or 34,

the determination unit is specifically configured to determine the value of the equation P_start= MmodN, determining the cycle start PMI serial number, wherein M is the number of times that the current TP sends data to the UE, N is the number of codebooks, P is_startPMI sequence number for the cycle start and according to formula P_i=（P_start+ i) modN determining PMIs required for the transmission corresponding to indexes of the RBs, respectively,wherein, P_iI is an index of the RB for the PMI required for the transmission.

36. The wireless access device of any one of claims 29 to 35,

37. A transmission control system, comprising:

the wireless access device of any of claims 19 to 27 or any of claims 28 to 36 and a UE in data transmission with the wireless access device.