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CN103517432B - Channel resource indicating method and device - Google Patents

Channel resource indicating method and device Download PDF

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Publication number
CN103517432B
CN103517432B CN201210222572.5A CN201210222572A CN103517432B CN 103517432 B CN103517432 B CN 103517432B CN 201210222572 A CN201210222572 A CN 201210222572A CN 103517432 B CN103517432 B CN 103517432B
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epdcch
resource
downlink
resource indication
channel
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CN103517432A (en
Inventor
张兴炜
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Guangdong Gaohang Intellectual Property Operation Co ltd
Tongding Interconnection Information Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201210222572.5A priority Critical patent/CN103517432B/en
Priority to PCT/CN2013/075103 priority patent/WO2014000507A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a channel resource indicating method. The method comprises the steps that the channel resource indicating information of an ePDCCH is obtained; the channel resource indicating information is transmitted to user equipment; the channel resource indicating information comprises resource indicating fields of y bits; the resource indicating fields are used for indicating the position of resources used by the ePDCCH; y is a positive integer. The invention further discloses a base station and the user equipment. The channel resource indicating method and device can reduce the cost of control commands used for indicating the ePDCCH, and the power consumption of the user equipment is saved.

Description

Channel resource indication method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for indicating channel resources.
Background
The 3GPP (3 rd Generation Partnership Project) LTE-ARel-10/11 (Long Term Evolution-advanced Rel-10/11, version 10/11) is an enhancement to LTE Rel-8 technology, with LTE-a systems having higher bandwidth requirements than LTE systems, supporting peak data rates up to 1 Gbits/s. In order to meet the bandwidth requirement of LTE-a, the LTE-a system uses a CA (Carrier Aggregation) technique as a method for expanding the system bandwidth, and largely adopts a Multiple Input Multiple Output (MIMO) enhancement technique and an adaptive technique to improve the data rate and the system performance.
In the system of the LTE-a Rel-11 previous release, a base station carries scheduling grant information on a PDCCH (Physical Downlink control Channel) for scheduling a PDSCH (Physical Downlink Shared Channel) and a PUSCH (Physical Uplink Shared Channel). The PDCCH is generally configured in the first 1-3 symbols of one subframe, and each PDCCH is transmitted using one or more CCEs (Control Channel elements). The number of CCEs used by PDCCH is called AL (Aggregation Level), and AL may be 1, 2, 4 or 8. Since a UE (User Equipment) does not know the AL of the PDCCH corresponding to the DCI transmitted to the UE in advance, nor the specific location of the PDCCH corresponding to the DCI transmitted to the UE, the UE needs to determine the location of the PDCCH corresponding to the DCI transmitted to the UE by blind detection.
The Information carried in the PDCCH is called DCI (Downlink Control Information), and the DCI includes Information such as resource allocation and modulation/demodulation scheme of the PDSCH or PUSCH. Existing DCI formats include 13 DCI Format 0/1/1a/1B/1C/1D/2/2A/2B/2C/3/3A/4, where the DCI Format 0/4 is used for scheduling a PUSCH and is called an uplink scheduling grant command (UL grant), and the DCI Format 1/1a/1B/1C/1D/2/2A/2B/2C is used for scheduling a PDSCH and is called a downlink scheduling grant command (DL grant), and the DCI Format 3/3A is used for indicating a closed-loop power control command of a group of UEs.
In the existing standard, 3 types are allocated to time-frequency resources of a downlink data channel PDSCH, which are Type0, Type1, and Type2, specifically as follows:
the basic idea of Type0 is to form a Resource Block Group (RBG) from multiple RB blocks, and to indicate Resource allocation in a bitmap manner, so that 1bit corresponds to one RBG for indicating whether the RBG is allocated to a UE. The size of the RBG (i.e., the number of RB blocks in the RBG) is denoted by P, and the value of P is related to the system bandwidth. For example:when the DL (Downlink) system bandwidth (specifically, the number of RB resource blocks included) is 26 and P is 2, the number of RBGs is 13.
Type1 also indicates resource allocation in a bitmap manner, but different from Type0, Type1 divides RBs into different subsets according to parity, and then indicates whether RBs in one subset are allocated to the UE in a bitmap manner.
Type2 is a centralized allocation mode, and is allocated to a certain UE by a continuous RB; the Type2 includes the start position of the time-frequency resource allocated to the UE and the length of the time-frequency resource.
In LTE Rel-11, an ePDCCH (Enhanced Physical downlink control Channel) is introduced in a PD SCH region to solve the problem of insufficient PDCCH capacity. As shown in fig. 1, ePDCCH is multiplexed with PDSCH in an FDM (Frequency Division Multiplexing) manner. The information of the ePDCCH can be indicated by a conventional PDCCH for a secondary indication or by a higher layer signaling. The PDCCH indication belongs to dynamic indication, and the PDCCH of the current subframe can indicate the position of the ePDCCH of the current subframe. While the higher layer signaling (such as MAC CE or RRC signaling indication) belongs to the semi-static indication, it takes a long time to update the indication information.
The existing resource allocation modes for the PDSCH are not suitable for the indication of the ePDCCH, and the following problems mainly exist:
1) the existing time-frequency resource indication mode of the 3 types of PDSCHs can only indicate RB or RBG levels, ePDCCH can only occupy partial CCEs in one RB, namely, one RB can be multiplexed by ePDCCH of a plurality of UEs, and the accurate position of the ePDCCH cannot be known by the existing resource indication mode. Although the UE can obtain the ePDCCH through blind detection even if the precise position is not indicated, blind detection is relatively power-consuming, and if precise indication can be performed, power consumption of the UE is saved.
Disclosure of Invention
Aspects of the embodiments of the present invention provide a channel resource indication method and device, which can reduce overhead of a control signaling for indicating an ePDCCH and save power consumption of a user equipment.
One aspect of the embodiments of the present invention provides a channel resource indication method, including:
acquiring channel resource indication information of an enhanced physical downlink control channel (ePDCCH);
transmitting the channel resource indication information to user equipment;
wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer.
Another aspect of the embodiments of the present invention provides a channel resource indication method, including:
receiving channel resource indication information of an enhanced physical downlink control channel (ePDCCH) sent by a base station; wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer;
and determining the resource used by the ePDCCH according to the channel resource indication information.
Another aspect of the embodiments of the present invention provides a base station, including:
an indication obtaining unit, configured to obtain channel resource indication information of an enhanced physical downlink control channel ePDCCH; and,
an indication sending unit, configured to send the channel resource indication information to a user equipment;
wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer.
Another aspect of an embodiment of the present invention provides a user equipment, including:
an indication receiving unit, configured to receive channel resource indication information of an enhanced physical downlink control channel ePDCCH sent by a base station; wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer; and,
a resource determining unit, configured to determine a resource used by the ePDCCH according to the channel resource indication information.
According to the channel resource indication method, the base station and the user equipment provided by the embodiment of the invention, the position of the resource used by the ePDCCH is indicated by adopting the channel resource indication information, so that the overhead of a control signaling for indicating the ePDCCH can be reduced, the times of blind detection on the ePDCCH by the user equipment are reduced, and the power consumption of the user equipment is saved.
Drawings
Fig. 1 is a schematic diagram of ePDCCH and PDSCH multiplexing in the prior art;
fig. 2 is a flowchart illustrating a method for indicating channel resources according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating another channel resource indication method according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a user equipment in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an embodiment of a resource determination unit of the user equipment shown in fig. 5;
fig. 7 is a schematic structural diagram of another embodiment of a resource determination unit of the user equipment shown in fig. 5;
fig. 8 is a schematic structural diagram of a further embodiment of the resource determination unit of the user equipment shown in fig. 5.
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.
Referring to fig. 2, the present embodiment provides a channel resource indication method, including the following steps:
s21, acquiring the channel resource indication information of the enhanced physical downlink control channel ePDCCH.
And S22, sending the channel resource indication information to the user equipment.
Wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer.
The channel resource indication information of the enhanced physical downlink control channel ePDCCH is carried in a physical downlink control channel PDCCH or carried through a high-level signaling; the high-level signaling includes a MAC (Medium Access Control) CE (Control Element) signaling, a Radio Resource Control (RRC) signaling, or other signaling.
It should be noted that, the steps S21 to S22 may be executed by the base station, and the channel resource indication information is issued by the base station to the user equipment. Of course, the steps S21-S22 can be executed by a device having a base station function. After the user equipment receives the channel resource indication information, the resource used by the ePDCCH can be determined according to the channel resource indication information.
Wherein the resource indication field can indicate a resource position used by the ePDCCH when multiplexing a Physical Downlink Shared Channel (PDSCH). The position of the resource used by the ePDCCH comprises the position of a resource block group RBG, the position of a resource block RB or the position of a CCE used by the ePDCCH.
The embodiment of the invention can not limit the accuracy of the ePDCCH resource indication, the resource indication domain can only indicate the RBG range, RB range or CCE range in which the ePDCCH resource is positioned, and the user equipment is allowed to perform blind detection in the RBG range, RB range or CCE range indicated by the resource indication domain within the blind detection capability range of the user equipment so as to determine the specific position of the CCE used by the ePDCCH.
In an optional embodiment, the resources used by the ePDCCH are located in k downlink RBGs,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
Assuming k =4 and 4 CCEs in one RB, downlink signals can be used for ePDCCHThe probability of choosing 4 CCEs in a RB is totallyOnly need toThe bit can indicate the position range of the CCE occupied by the ePDCCH.
In the Y-bit resource indication field, different values correspond to different resource configuration modes. For example, AL =1,NCCE=4, thenThe resource indication field using 2 (i.e., Y = 2) bits indicates the resource location of the CCE used by the ePDCCH. When the resource indication field is 00, indicating that the CCE used by the ePDCCH is the first CCE of the RB; when the resource indication field is 01, indicating that the CCE used by the ePDCCH is the second CCE of the RB; when the resource indication field is 10, indicating that the CCE used by the ePDCCH is the third CCE of the RB; when the resource indication field is 11, the CCE used by the ePDCCH is the fourth CCE of the RB.
When the bit number Y occupied by the resource indication field is the formula (1), the position range of the RBG used by the ePDCCH can be indicated.
When the bit number Y occupied by the resource indication field is the above formula (2), the position range of the RB used by the ePDCCH can be indicated.
When the bit number Y occupied by the resource indication field is the above formula (3), the position range of the CCE used by the ePDCCH can be indicated.
After obtaining the resource indication field of the above formula (1), (2) or (3), the user equipment performs blind detection using a possible aggregation level AL (AL represents the number of CCEs used by the ePDCCH, for example, AL may be 1, 2, 4 or 8) of the ePDCCH in the location range of the RBG, the location range of the RB or the location range of the CCEs indicated by the resource indication field, and can determine a specific location of the CCEs used by the ePDCCH.
In the resource indication method provided in this embodiment, the resource indication field included in the channel resource indication information only indicates the location range of the RBG, the location range of the RB, or the location range of the CCE where the ePDCCH resource is located, and in the range of the blind detection capability of the user equipment, the user equipment is allowed to perform blind detection in the location range of the RBG, the location range of the RB, or the location range of the CCE indicated by the resource indication field, so that bits occupied by the resource indication field can be reduced, thereby reducing overhead of control signaling for indicating the ePDCCH.
Further, the channel resource indication information of the ePDCCH further includes an aggregation level indication field of X bits; the aggregation level indication field is used for indicating the number of Control Channel Elements (CCEs) used by the ePDCCH; x is a positive integer.
Alternatively to this, the first and second parts may,the aggregation level AL represents the number of CCEs used by ePDCCH, and a mathematical symbolRepresents the smallest integer greater than or equal to a. For example, assuming that AL may be 1, 2, 4, or 8, the channel resource indication information includes a convergence level indication field of 2 (i.e., Y = 2) bits. When the convergence level indication domain is 00, indicating that AL of the ePDCCH is 1; when the convergence level indication domain is 01, indicating that AL of the ePDCCH is 2; when the aggregation level indication domain is 10, indicating that the AL of the ePDCCH is 4; when the convergence level indication field is 11, the AL indicating the ePDCCH is 8.
It should be noted that, the present invention only describes the configuration method of the convergence level indication domain by taking an example that AL may be 1, 2, 4, or 8, and AL may also be other values in a specific implementation.
The embodiment of the invention uses the convergence level indication domain to indicate the number of CCEs used by the ePDCCH, so that the user equipment does not need to determine the number of the CCEs used by the ePDCCH through blind detection, and the power consumption of the user equipment can be saved. For example, after the user equipment determines the location range of the RBG, the location range of the RB, or the location range of the CCE where the ePDCCH resource is located through the resource indication field of the above formula (1), (2), or (3), and can determine the aggregation level AL of the ePDCCH through the aggregation level indication field (e.g., AL = 4), the user equipment may directly use the determined AL value to perform detection in the location range of the RBG, the location range of the RB, or the location range of the CCE, so as to obtain a specific location of the CCE used by the ePDCCH, which can reduce the number of times of blind detection performed by the user equipment, thereby saving the power consumption of the user equipment.
In addition, the embodiment of the invention can also accurately indicate the specific position of the CCE used by the ePDCCH in the channel resource indication information, and the specific position of the CCE resource used by the ePDCCH can be determined without blind detection after the user equipment obtains the channel resource indication information, so that the power consumption of the user equipment can be saved.
In another optional embodiment, the resource used by the ePDCCH is located in at least one RB of the downlink,
or in one RB located in the downlink,
or in two RBs in the downlink, and the positions of CCEs used by the ePDCCH in the two RBs are the same,
wherein AL is the number of CCEs used by the ePDCCH,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
Moreover, the channel resource indication information of the ePDCCH further includes a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of CCEs used by the ePDCCH; x is a positive integer.
When the AL of the ePDCCH is 1 or 2, applying the method of the above formula (4), optionally selecting one or two CCEs from all possible CCEs for carrying the ePDCCH, where the two CCEs may be continuous or discontinuous, and if the two CCEs are discontinuous, a frequency domain diversity gain can be obtained. This is because two CCEs have difference in frequency domain, different frequencies experience different channel fading, and the probability that different frequencies experience deep fading simultaneously is reduced, thereby obtaining a certain diversity gain.
When the AL of the ePDCCH is greater than or equal to 4, the method of the formula (4) or (5) is applied, the CCE of the ePDCCH is limited to be selected from one or two RBs, and the positions of the CCE of the ePDCCH can be concentrated.
In the resource indication method provided in this embodiment, when the channel resource indication information includes the aggregation level indication field and the resource indication field, and the bit number Y occupied by the resource indication field is represented by the above formula (4), (5), or (6), the specific location of the CCE used by the ePDCCH can be accurately indicated. And the user equipment performs table look-up or derivation operation according to the value of the resource indication domain, can obtain the specific position of the CCE used by the ePDCCH, does not need blind detection, and can save the power consumption of the user equipment.
Referring to fig. 3, the present embodiment provides another channel resource indication method, including the following steps:
s31, receiving channel resource indication information of an enhanced physical downlink control channel (ePDCCH) sent by a base station; wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer.
S32, determining the resource used by the ePDCCH according to the channel resource indication information.
It should be noted that, the steps S31 to S32 may be executed by the ue, and the channel resource indication information is sent to the ue by the base station. Of course, the steps S31-S32 can be executed by a device having a function of a user equipment.
Wherein the resource indication field can indicate a resource position used by the ePDCCH when multiplexing a Physical Downlink Shared Channel (PDSCH). The position of the resource used by the ePDCCH comprises the position of a resource block group RBG used by the ePDCCH, the position of a resource block RB or the position of a control channel element CCE.
In an optional embodiment, the resources used by the ePDCCH are located in k downlink RBGs,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
Then, in step S32, the determining the resource used by the ePDCCH according to the channel resource indication information includes:
inquiring a resource configuration table according to the value of the resource indication domain, or performing derivation operation according to the value of the resource indication domain to obtain the position range of a Resource Block Group (RBG), the position range of a Resource Block (RB) or the position range of a Control Channel Element (CCE) used by the ePDCCH;
and according to the number of the CCEs possibly used by the ePDCCH, performing blind detection in the position range of the RBG, the position range of the RB or the position range of the CCE, and determining the position of the CCE used by the ePDCCH.
The resource configuration table comprises each value in different values of a resource indication domain and binding information of a resource position corresponding to each value. In specific implementation, the resource allocation table may be configured in advance according to actual needs.
Optionally, when performing derivation operation according to the value of the resource indication field, the algorithm used may be Best M (Best M values) algorithm or Top N (Best N values) algorithm, and the like.
In the resource indication method provided by this embodiment, the channel resource indication information includes a convergence level indication field and a resource indication field, and after the user equipment determines the location range of the RBG, the location range of the RB, or the location range of the CCE where the ePDCCH resource is located through the resource indication field and determines the convergence level AL of the ePDCCH through the convergence level indication field, the user equipment may directly use the determined AL value to perform detection in the location range of the RBG, the location range of the RB, or the location range of the CCE, so as to obtain a specific location of the CCE used by the ePDCCH, which can reduce the number of times of blind detection performed by the user equipment, thereby saving the power consumption of the user equipment.
In another optional embodiment, the resources used by the ePDCCH are located in k RBGs in the downlink,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
Moreover, the channel resource indication information of the ePDCCH further includes a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of CCEs used by the ePDCCH; x is a positive integer;
then, in step S32, the determining the resource used by the ePDCCH according to the channel resource indication information includes:
determining the number of CCEs used by the ePDCCH according to the value of the aggregation level indication domain;
inquiring a resource configuration table according to the value of the resource indication domain, or performing derivation operation according to the value of the resource indication domain to obtain a position range of an RBG, a position range of an RB or a position range of a CCE used by the ePDCCH; the resource configuration table comprises each value in different values of a resource indication domain and binding information of a resource position corresponding to each value;
and detecting in the position range of the RBG, the position range of the RB or the position range of the CCE according to the number of the CCEs used by the ePDCCH, and determining the position of the CCE used by the ePDCCH.
The embodiment of the invention uses the convergence level indication domain to indicate the number of CCEs used by the ePDCCH, so that the user equipment does not need to determine the number of the CCEs used by the ePDCCH through blind detection, and the power consumption of the user equipment can be saved. For example, after the user equipment determines the location range of the RBG, the location range of the RB, or the location range of the CCE where the ePDCCH resource is located through the resource indication field of the above formula (1), (2), or (3), and can determine the aggregation level AL of the ePDCCH through the aggregation level indication field (e.g., AL = 4), the user equipment may directly use the determined AL value to perform detection in the location range of the RBG, the location range of the RB, or the location range of the CCE, so as to obtain a specific location of the CCE used by the ePDCCH, which can reduce the number of times of blind detection performed by the user equipment, thereby saving the power consumption of the user equipment.
In yet another alternative embodiment, the resource used by the ePDCCH is located in at least one RB of the downlink,
or in one RB located in the downlink,
or in two RBs in the downlink, and the positions of CCEs used by the ePDCCH in the two RBs are the same,
wherein AL is the number of CCEs used by the ePDCCH,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
Moreover, the channel resource indication information of the ePDCCH further includes a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of CCEs used by the ePDCCH; x is a positive integer;
then, in step S32, the determining the resource used by the ePDCCH according to the channel resource indication information includes:
determining the number of CCEs used by the ePDCCH according to the value of the convergence level indication domain to obtain the value of the AL;
calculating to obtain the value of the resource indication domain according to the value of the AL;
inquiring a resource configuration table according to the value of the resource indication domain, or performing derivation operation according to the value of the resource indication domain to obtain the position of the CCE used by the ePDCCH; the resource configuration table comprises each value in different values of the resource indication domain and binding information of a resource position corresponding to each value.
In the resource indication method provided by this embodiment, the channel resource indication information includes a convergence level indication field and a resource indication field, and the user equipment performs table lookup or derivation operation according to the values of the convergence level indication field and the resource indication field, so that a specific position of a CCE used by the ePDCCH can be obtained without blind detection, and power consumption of the user equipment can be saved.
An embodiment of the present invention further provides a base station, which can implement the channel resource indication method in the embodiment of fig. 2.
Referring to fig. 4, the present embodiment provides a base station, which includes an indication acquiring unit 41 and an indication sending unit 42, and the details are as follows:
an indication obtaining unit 41, configured to obtain channel resource indication information of an enhanced physical downlink control channel ePDCCH.
An indication sending unit 42, configured to send the channel resource indication information to the user equipment.
Wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer.
Further, the channel resource indication information of the ePDCCH further includes an aggregation level indication field of X bits; the aggregation level indication field is used for indicating the number of Control Channel Elements (CCEs) used by the ePDCCH; x is a positive integer.
The resource indication field can indicate the resource position used by the ePDCCH when the ePDCCH is multiplexed on a Physical Downlink Shared Channel (PDSCH). The position of the resource used by the ePDCCH comprises the position of a resource block group RBG, the position of a resource block RB or the position of a CCE used by the ePDCCH.
The channel resource indication information of the enhanced physical downlink control channel ePDCCH is carried in a physical downlink control channel PDCCH or carried through a high-level signaling; the higher layer signaling comprises MAC CE signaling or RRC signaling.
In an optional embodiment, the resources used by the ePDCCH are located in k downlink RBGs,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
In another optional embodiment, the resource used by the ePDCCH is located in at least one RB of the downlink,
or in one RB located in the downlink,
or in two RBs in the downlink, and the positions of CCEs used by the ePDCCH in the two RBs are the same,
wherein AL is the number of CCEs used by the ePDCCH,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
An embodiment of the present invention further provides a user equipment, which can implement the channel resource indication method in the embodiment of fig. 3.
Referring to fig. 5, the present embodiment provides a user equipment, which includes an indication receiving unit 51 and a resource determining unit 52, specifically as follows:
an indication receiving unit 51, configured to receive channel resource indication information of an enhanced physical downlink control channel ePDCCH sent by a base station; wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer.
A resource determining unit 52, configured to determine a resource used by the ePDCCH according to the channel resource indication information.
Wherein the resource indication field can indicate a resource position used by the ePDCCH when multiplexing a Physical Downlink Shared Channel (PDSCH). The position of the resource used by the ePDCCH comprises the position of a resource block group RBG, the position of a resource block RB or the position of a CCE used by the ePDCCH.
In an optional embodiment, the resources used by the ePDCCH are located in k downlink RBGs,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
Referring to fig. 6, the present embodiment provides a resource determination unit including a first range determination subunit 61 and a first detection subunit 62, as follows:
a first range determining subunit 61, configured to query a resource configuration table according to the value of the resource indication domain, or perform derivation operation according to the value of the resource indication domain, to obtain a location range of a resource block group RBG, a location range of an RB, or a location range of a CCE used by the ePDCCH; the resource configuration table comprises each value in different values of the resource indication domain and binding information of a resource position corresponding to each value.
A first detecting subunit 62, configured to perform blind detection in the location range of the RBG, the location range of the RB, or the location range of the CCE according to the number of CCEs possibly used by the ePDCCH, and determine a location of the CCE used by the ePDCCH.
In another optional embodiment, the resources used by the ePDCCH are located in k RBGs in the downlink,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
Moreover, the channel resource indication information of the ePDCCH further includes a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of CCEs used by the ePDCCH; x is a positive integer.
Referring to fig. 7, the present embodiment provides another resource determining unit, which includes a convergence level determining subunit 71, a second range determining subunit 72, and a second detecting subunit 73, as follows:
a convergence level determining subunit 71, configured to determine, according to the value of the convergence level indication field, the number of CCEs used by the ePDCCH.
A second range determining subunit 72, configured to query a resource configuration table according to the value of the resource indication domain, or perform derivation operation according to the value of the resource indication domain, to obtain a location range of an RBG, a location range of an RB, or a location range of a CCE used by the ePDCCH; the resource configuration table comprises each value in different values of the resource indication domain and binding information of a resource position corresponding to each value.
A second detecting subunit 73, configured to perform detection in the location range of the RBG, the location range of the RB, or the location range of the CCE according to the number of CCEs used by the ePDCCH, and determine a location of the CCE used by the ePDCCH.
In yet another alternative embodiment, the resource used by the ePDCCH is located in at least one RB of the downlink,
or in one RB located in the downlink,
or is located belowIn two RBs of a row, and the positions of CCEs used by the ePDCCH in the two RBs are the same,
wherein AL is the number of CCEs used by the ePDCCH,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
Moreover, the channel resource indication information of the ePDCCH further includes a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of CCEs used by the ePDCCH; x is a positive integer.
Referring to fig. 8, the present embodiment provides another resource determining unit, which includes a convergence level determining subunit 81, a resource indication determining subunit 82, and a resource obtaining subunit 83, as follows:
a convergence level determining subunit 81, configured to determine, according to the value of the convergence level indication field, the number of CCEs used by the ePDCCH, and obtain the value of AL.
And the resource indication determining subunit 82 is configured to calculate and obtain a value of the resource indication field according to the value of the AL.
A resource obtaining subunit 83, configured to query a resource configuration table according to the value of the resource indication domain, or perform derivation operation according to the value of the resource indication domain, to obtain a location of a CCE used by the ePDCCH; the resource configuration table comprises each value in different values of the resource indication domain and binding information of a resource position corresponding to each value.
According to the channel resource indication method, the base station and the user equipment provided by the embodiment of the invention, the position of the resource used by the ePDCCH is indicated by adopting the channel resource indication information, so that the overhead of a control signaling for indicating the ePDCCH can be reduced, the times of blind detection on the ePDCCH by the user equipment are reduced, and the power consumption of the user equipment is saved.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims (20)

1. A method for indicating channel resources, comprising:
acquiring channel resource indication information of an enhanced physical downlink control channel (ePDCCH);
transmitting the channel resource indication information to user equipment;
wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer;
wherein the resource used by the ePDCCH is positioned in a downlinkOf the k number of RBGs, the number of RBGs,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a;
or,
the resource used by the ePDCCH is located in at least one RB of a downlink,
or in one RB located in the downlink,
or in two RBs located in the downlink, and the positions in the two RBs are the same,
wherein AL is the number of CCEs used by the ePDCCH,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
2. The channel resource indication method of claim 1, wherein the channel resource indication information of the ePDCCH further comprises a convergence level indication field of X bits;
the aggregation level indication field is used for indicating the number of Control Channel Elements (CCEs) used by the ePDCCH; x is a positive integer.
3. The channel resource indication method of claim 1 or 2, wherein the location of the resource used by the ePDCCH comprises a location of a Resource Block Group (RBG), a location of a Resource Block (RB), or a location of a CCE used by the ePDCCH.
4. The method for indicating channel resources according to any of claims 1-2,
the channel resource indication information is carried in a Physical Downlink Control Channel (PDCCH) or carried through a high-level signaling;
the high-level signaling comprises Media Access Control (MAC) control unit (CE) signaling or Radio Resource Control (RRC) signaling.
5. The channel resource indication method of claim 3,
the channel resource indication information is carried in a Physical Downlink Control Channel (PDCCH) or carried through a high-level signaling;
the high-level signaling comprises Media Access Control (MAC) control unit (CE) signaling or Radio Resource Control (RRC) signaling.
6. A method for indicating channel resources, comprising:
receiving channel resource indication information of an enhanced physical downlink control channel (ePDCCH) sent by a base station; wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer;
determining the resource used by the ePDCCH according to the channel resource indication information;
wherein the resource used by the ePDCCH is located in k RBGs in the downlink,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a;
or,
the resource used by the ePDCCH is positioned inIn at least one RB of the downlink, the RB is,
or in one RB located in the downlink,
or in two RBs located in the downlink, and the positions in the two RBs are the same,
wherein AL is the number of CCEs used by the ePDCCH,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
7. The channel resource indication method of claim 6, wherein the location of the resource used by the ePDCCH comprises a location of a Resource Block Group (RBG), a location of a Resource Block (RB), or a location of a Control Channel Element (CCE) used by the ePDCCH.
8. The method for indicating channel resources according to claim 6 or 7, wherein the determining the resources used by the ePDCCH according to the channel resource indication information includes:
inquiring a resource configuration table according to the value of the resource indication domain, or performing derivation operation according to the value of the resource indication domain to obtain the position range of a Resource Block Group (RBG), the position range of a Resource Block (RB) or the position range of a Control Channel Element (CCE) used by the ePDCCH; the resource configuration table comprises each value in different values of a resource indication domain and binding information of a resource position corresponding to each value;
and according to the number of the CCEs possibly used by the ePDCCH, performing blind detection in the position range of the RBG, the position range of the RB or the position range of the CCE, and determining the position of the CCE used by the ePDCCH.
9. The channel resource indication method of claim 8, wherein the channel resource indication information of the ePDCCH further comprises a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of Control Channel Elements (CCEs) used by the ePDCCH; x is a positive integer;
then the determining the resource used by the ePDCCH according to the channel resource indication information includes:
determining the number of CCEs used by the ePDCCH according to the value of the aggregation level indication domain;
inquiring a resource configuration table according to the value of the resource indication domain, or performing derivation operation according to the value of the resource indication domain to obtain a position range of an RBG, a position range of an RB or a position range of a CCE used by the ePDCCH; the resource configuration table comprises each value in different values of a resource indication domain and binding information of a resource position corresponding to each value;
and detecting in the position range of the RBG, the position range of the RB or the position range of the CCE according to the number of the CCEs used by the ePDCCH, and determining the position of the CCE used by the ePDCCH.
10. The channel resource indication method of claim 6 or 7, wherein the channel resource indication information of the ePDCCH further comprises a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of Control Channel Elements (CCEs) used by the ePDCCH; x is a positive integer;
then the determining the resource used by the ePDCCH according to the channel resource indication information includes:
determining the number of CCEs used by the ePDCCH according to the value of the convergence level indication domain to obtain the value of the AL;
calculating to obtain the value of the resource indication domain according to the value of the AL;
inquiring a resource configuration table according to the value of the resource indication domain, or performing derivation operation according to the value of the resource indication domain to obtain the position of the CCE used by the ePDCCH; the resource configuration table comprises each value in different values of the resource indication domain and binding information of a resource position corresponding to each value.
11. A base station, comprising:
an indication obtaining unit, configured to obtain channel resource indication information of an enhanced physical downlink control channel ePDCCH; and,
an indication sending unit, configured to send the channel resource indication information to a user equipment;
wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer;
wherein the resource used by the ePDCCH is located in k RBGs in the downlink,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a;
or,
the resource used by the ePDCCH is located in at least one RB of a downlink,
or in one RB located in the downlink,
or in two RBs located in the downlink, and the positions in the two RBs are the same,
wherein AL is the number of CCEs used by the ePDCCH,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
12. The base station of claim 11, wherein the channel resource indication information of the ePDCCH further comprises a convergence level indication field of X bits;
the aggregation level indication field is used for indicating the number of Control Channel Elements (CCEs) used by the ePDCCH; x is a positive integer.
13. The base station of claim 11 or 12, wherein the location of the resource used by the ePDCCH comprises a location of a resource block group, RBG, a location of a resource block, RB, or a location of a CCE used by the ePDCCH.
14. The base station of any of claims 11 to 12,
the channel resource indication information is carried in a Physical Downlink Control Channel (PDCCH) or carried through a high-level signaling;
the high-level signaling comprises Media Access Control (MAC) control unit (CE) signaling or Radio Resource Control (RRC) signaling.
15. The base station of claim 13,
the channel resource indication information is carried in a Physical Downlink Control Channel (PDCCH) or carried through a high-level signaling;
the high-level signaling comprises Media Access Control (MAC) control unit (CE) signaling or Radio Resource Control (RRC) signaling.
16. A user device, comprising:
an indication receiving unit, configured to receive channel resource indication information of an enhanced physical downlink control channel ePDCCH sent by a base station; wherein the channel resource indication information comprises a resource indication field with Y bits; the resource indication field is used for indicating the position of the resource used by the ePDCCH; y is a positive integer; and,
a resource determining unit, configured to determine, according to the channel resource indication information, a resource used by the ePDCCH;
wherein the resource used by the ePDCCH is located in k RBGs in the downlink,
or in the k RBs located in the downlink,
or in the k CCEs located in the downlink,
wherein k is a positive integer,is the number of RBGs available to carry the ePDCCH in the downlink,number of RBs, N, that are downlink and available for carrying the ePDCCHCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a;
or,
the resource used by the ePDCCH is located in at least one RB of a downlink,
or in one RB located in the downlink,
or in two RBs in the downlink, and the positions of CCEs used by the ePDCCH in the two RBs are the same,
wherein AL is the number of CCEs used by the ePDCCH,is a downlink RB that can be used to carry the ePDCCHNumber, NCCEIs the number of CCEs contained in one RB, mathematical notationRepresents the smallest integer greater than or equal to a.
17. The user equipment of claim 16, wherein the location of the resource used by the ePDCCH comprises a location of a resource block group, RBG, location of a resource block, RB, or location of a control channel element, CCE, used by the ePDCCH.
18. The user equipment according to claim 16 or 17, wherein the resource determining unit comprises:
a first range determining subunit, configured to query a resource configuration table according to the value of the resource indication domain, or perform derivation operation according to the value of the resource indication domain, to obtain a location range of a resource block group RBG, a location range of an RB, or a location range of a CCE used by the ePDCCH; the resource configuration table comprises each value in different values of a resource indication domain and binding information of a resource position corresponding to each value; and,
a first detection subunit, configured to perform blind detection in the location range of the RBG, the location range of the RB, or the location range of a CCE according to the number of CCEs potentially used by the ePDCCH, and determine a location of the CCE used by the ePDCCH.
19. The user equipment of claim 16 or 17, wherein the channel resource indication information of the ePDCCH further comprises a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of CCEs used by the ePDCCH; x is a positive integer;
the resource determination unit includes:
a convergence level determining subunit, configured to determine, according to the value of the convergence level indication field, the number of CCEs used by the ePDCCH;
a second range determining subunit, configured to query a resource configuration table according to the value of the resource indication domain, or perform derivation operation according to the value of the resource indication domain, to obtain a location range of an RBG, a location range of an RB, or a location range of a CCE used by the ePDCCH; the resource configuration table comprises each value in different values of a resource indication domain and binding information of a resource position corresponding to each value; and,
and a second detection subunit, configured to perform detection in the location range of the RBG, the location range of the RB, or the location range of the CCE according to the number of CCEs used by the ePDCCH, and determine a location of the CCE used by the ePDCCH.
20. The user equipment of claim 16 or 17, wherein the channel resource indication information of the ePDCCH further comprises a convergence level indication field of X bits; the aggregation level indication field is used for indicating the number of CCEs used by the ePDCCH; x is a positive integer;
the resource determination unit includes:
a convergence level determining subunit, configured to determine, according to the value of the convergence level indication field, the number of CCEs used by the ePDCCH, and obtain the value of the AL;
the resource indication determining subunit is configured to calculate and obtain a value of the resource indication domain according to the value of the AL; and,
a resource obtaining subunit, configured to query a resource configuration table according to the value of the resource indication domain, or perform derivation operation according to the value of the resource indication domain, to obtain a location of a CCE used by the ePDCCH; the resource configuration table comprises each value in different values of the resource indication domain and binding information of a resource position corresponding to each value.
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