WO2012152149A1

WO2012152149A1 - Information receiving/sending method and device in physical downlink control channel

Info

Publication number: WO2012152149A1
Application number: PCT/CN2012/073197
Authority: WO
Inventors: 赵锐; 沈祖康; 潘学明; 肖国军
Original assignee: 电信科学技术研究院
Priority date: 2011-05-11
Filing date: 2012-03-28
Publication date: 2012-11-15
Also published as: CN102170703A

Abstract

Disclosed are an information receiving/sending method and device in a physical downlink control channel. The method includes: a base station indicates the resource location of an enhanced physical downlink control channel cluster to user equipment; and the base station transmits scheduling information to the user equipment at the resource location of the enhanced physical downlink control channel cluster. The user equipment determines the resource location of the enhanced physical downlink control channel cluster according to the indication of the base station; and the user equipment carries out blind detection at the resource location of the enhanced physical downlink control channel cluster so as to receive the scheduling information transmitted by the base station to the user equipment. The present invention can effectively improve the capacity of the physical downlink control channel and at the same time can effectively improve the utilization rate of the enhanced physical downlink control channel resources.

Description

Method and device for transmitting and receiving information on a physical downlink control channel The present invention is required to be submitted to the Chinese Patent Office on May 11, 2011, and the application number is 201110121262.X, and the invention name is "a method for transmitting and receiving information on a physical downlink control channel". The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference. Technical field

The present invention relates to wireless communication technologies, and in particular, to a method and device for transmitting and receiving information on a physical downlink control channel. Background technique

Figure 1 is a schematic diagram of the multiplexing relationship between a control region and a data region in a downlink subframe. In the figure, Nc subcarriers are the number of subcarriers available to the system, and Nc subcarriers, as shown in the figure, in LTE (Long Term Evolution, long term) In the evolved system, the downlink control channel PDCCH (Physical Downlink Control Channel) is transmitted in each radio subframe and is associated with the downlink data PDSCH.

(Physical Downlink Shared Channel) A TDM (Time Division Multiplexing) multiplexing relationship is formed. The PDCCH is transmitted by the first N OFDM (Orthogonal Frequency Division Multiplex) symbols in a downlink sub-subsequent, where N may take values of 1, 2, 3, 4, and N=4 is only allowed to appear. In systems with a system bandwidth of 1.4MHz.

The control region for transmitting PDCCH in the LTE system is a CCE divided by logic.

(Control Channel Element, Control Channel Element), where the mapping of CCE to RE (Resource Element) is completely interleaved. The transmission of DCI (Downlink Control Information) is also based on CCE. One DCI for one UE (User Equipment) can be transmitted in N consecutive CCEs. The value is 1, 2, 4, and 8 and is called the CCE aggregation level. The UE performs a PDCCH blind check in the control area to search whether there is a PDCCH for the PDCCH, and the blind detection uses the RNTI (Radio Network Temporary Identity) of the UE to decode different DCI formats and CCE aggregation levels. If the decoding is correct, the DCI for the UE is received. The LTE UE needs to perform blind detection on the control region for each downlink subframe in the non-DRX (Discontinuous Reception) state to search for the PDCCH.

The control area in one subframe of the LTE system is composed of two spaces, namely CSS (Common Search Space) and UESS (UE-specific Search Space). The common search space is mainly used for transmitting DCIs for scheduling cell-specific control information (such as system information, paging messages, multicast power control information, etc.), and the user-specific search space is mainly used for transmitting DCIs scheduled for each UE resource. The common search space in each downlink subframe includes the first 16 CCEs, and the CCE aggregation level in the common search space only supports 4, 8; the starting CCE location of each user-specific UE search space in each downlink subframe Related to the subframe number, the RNTI of the UE, etc., the CCE aggregation level 1 , 2, 4, 8 is supported in the user-specific search space. In UESS, blind detection of each aggregation level corresponds to one search space, that is, UE blind detection different aggregation levels are performed in different search spaces. Table 1 shows the CCE space that a UE needs to be blindly checked in a downlink subframe, where L indicates the size of the aggregation level, Size indicates the number of CCEs that need to be blindly checked for each aggregation level, and M ( L ) indicates The number of blind test attempts for each aggregation level. 2 is a schematic diagram of a UE performing PDCCH blind detection in a downlink subframe. As shown in the figure, FIG. 2 further shows an indication of the blind detection process. According to Table 1, a UE needs to perform 22 PDCCH channel resource attempts in one downlink subframe, wherein the common search space has a total of 6 PDCCH channel resources, and the user-specific search space has a total of 16 PDCCH channel resources.

Table 1: CCE space that a UE needs to blindly check in a downlink subframe Search space ^k Number of

PDCCH

Aggregation

Type Size [in CCEs] candidates

Level ^L

1 6 6

2 12 6

UESS

4 8 2

8 16 2

4 16 4

CSS

8 16 2

LTE-Advanced (Long Term Evolution-Advanced) system continues to evolve and is studying COMP (Coordinated multi-point transmission/reception) and enhanced MU-MIMO (Multiusers-MIMO, multi-user) MIMO; MIMO: Multiple Input Multiple Output, multiple transmission multiple transmission scheme. A possible scenario of the COMP is that a macro base station and a plurality of distributed RRHs (remote radio heads) logically form a cell, and the coverage of the cell and the number of users accessed are more than the original ones. The LTE system has greatly increased. At the same time, the extensive use of enhanced MU-MIMO has greatly increased the number of users in the community. Therefore, higher requirements are placed on the capacity of the PDCCH, and the existing LTE PDCCH design cannot meet the requirements.

In order to solve the problem of PDCCH resource limitation and capacity shortage as mentioned above, one solution is to transmit an enhanced PDCCH in units of PRB (physical resource block) in a PDSCH region in one downlink subframe. PDCCH), FIG. 3 is a schematic diagram of a structure of an enhanced PDCCH. As shown in FIG. 3, a conventional PDCCH is called a legacy PDCCH, and a PCFICH is a physical control format indicator channel (Physical Control Format Indicator Channel). The disadvantage of the prior art is that there is no enhancement to the existing disclosed technology.

The design of the search space in the PDCCH gives a specific scheme. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and device for transmitting and receiving information on an enhanced PDCCH.

An embodiment of the present invention provides a method for sending information on a PDCCH, including the following steps:

The base station indicates to the UE the resource location of the enhanced PDCCH cluster constituting the enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs;

The base station transmits scheduling information to the UE at the resource location of the enhanced PDCCH cluster.

An embodiment of the present invention provides a method for receiving information on a PDCCH, including the following steps:

The UE determines, according to the indication of the base station, the resource location of the enhanced PDCCH cluster that constitutes the enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs; the UE performs blind detection on the resource location of the enhanced PDCCH cluster to receive scheduling information transmitted by the base station to the UE.

A base station is provided in the embodiment of the present invention, including:

And an indication module, configured to indicate, to the UE, a resource location of an enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs;

And a transmission module, configured to transmit scheduling information to the UE at a resource location of the enhanced PDCCH cluster.

A user equipment is provided in the embodiment of the present invention, including:

a determining module, configured to determine, according to an indication of a base station, a resource location of an enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs;

Blind detection module for performing resource locations on the enhanced PDCCH cluster Blind detection to receive scheduling information transmitted by the base station to the UE.

The beneficial effects of the present invention are as follows:

For the enhanced PDCCH, the resource utilization of the PDCCH in the technical solution provided by the embodiment of the present invention is higher than that of the PDCCH in the traditional LTE Rel-8 or Rel-10, and thus can be carried in the same PDCCH resource. The number of PDCCHs is relatively large, so the capacity of the PDCCH can be effectively increased. DRAWINGS

1 is a schematic diagram of a multiplexing relationship between a control area and a data area in a downlink subframe in the background art;

2 is a schematic diagram of a PDCCH blind check performed by a UE in a downlink subframe in the background art;

3 is a schematic structural diagram of an enhanced PDCCH in the background art; FIG. 4 is a schematic flowchart of a method for transmitting information on a PDCCH on a base station side according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart of implementing an information receiving method on a PDCCH of a UE side according to an embodiment of the present disclosure;

6 is a schematic diagram of indicating an enhanced PDCCH cluster resource location in an embodiment of the present invention;

7 is a schematic diagram of an enhanced PDCCH cluster according to an embodiment of the present invention; FIG. 8 is a schematic diagram 1 of a PDCCH search space of a DL grant with different time-frequency resource aggregation levels according to an embodiment of the present invention;

FIG. 9 is a second schematic diagram of a PDCCH search space of a DL grant with different time-frequency resource aggregation levels according to an embodiment of the present invention;

10 is a schematic diagram 1 of a PDCCH search space of a UL grant different time-frequency resource aggregation level according to an embodiment of the present invention;

11 is a second schematic diagram of a PDCCH search space of a UL grant different time-frequency resource aggregation level according to an embodiment of the present invention; FIG. 12 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. detailed description

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

In the description process, the implementation from the UE and the base station side will be described separately, and the cooperation implementation of the two will be described at the same time, but this does not mean that the two must cooperate with the implementation. In fact, when the UE is implemented separately from the base station, It also solves the problems existing on the UE side and the base station side respectively, but only when the two are combined, a better technical effect is obtained.

FIG. 4 is a schematic flowchart of a method for transmitting information on a PDCCH on a base station side. As shown in the figure, the following steps may be included:

Step 401: The base station indicates, to the UE, a resource location of an enhanced PDCCH cluster (Enhanced PDCCH cluster) that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs;

Step 402: The base station transmits scheduling information to the UE at a resource location of the enhanced PDCCH cluster.

FIG. 5 is a schematic flowchart of a method for receiving information on a PDCCH on a UE side. As shown in the figure, the following steps may be included:

Step 501: The UE determines, according to an indication of the base station, a resource location of an enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs;

Step 502: The UE performs blind detection on the resource location of the enhanced PDCCH cluster to receive scheduling information that the base station transmits to the UE.

The specific embodiments will be described below.

6 is a schematic diagram indicating the location of an enhanced PDCCH cluster resource, such as S1 and S2 shown in FIG. 6, which respectively indicate the number of the PRB starting from the enhanced PDCCH cluster (enhanced resource cluster) 1 and 2, where the enhanced PDCCH cluster It can be one or more, and the figure shows two. In an implementation, the base station indicates, to the UE, the resource location of the enhanced PDCCH cluster that constitutes the enhanced PDCCH, which may include:

1. Indicate the resource location occupied by the enhanced PDCCH cluster, and the resources are continuous or discontinuous;

Or, 2, indicating to the UE by indicating a starting PRB number position of the first enhanced PDCCH cluster, and by another signaling indication or by specifying a frequency domain interval between different enhanced PDCCH clusters by a protocol. Specifically, the indication manner may be a starting PRB number indicating the first cluster, and the frequency domain interval between different clusters is indicated by another signaling, or by a protocol.

Or, 3, by indicating the starting point of each enhanced PDCCH cluster

The PRB number location is indicated to the UE. Specifically, the indication manner may be indicating the starting point PRB number position of each cluster.

Figure 7 is a schematic diagram of enhanced PDCCH cluster, Enhanced PDCCH cluster. Figure 7 shows:

1. The number of PRBs in the enhanced PDCCH cluster may be fixed or may be configured by signaling.

Specifically, the number of PRBs in an enhanced PDCCH cluste may be fixed, for example, 4 or 8; or may be configured by signaling.

2. The granularity of the resources within the enhanced PDCCH cluster is in the frequency domain in the PRB unit. In the time domain, the time slot is the unit. In a subframe duration, the minimum resource of two enhance PDCCH clusters in one PRB is the smallest. Units, different aggregation levels in the enhanced PDCCH cluster refer to the aggregation level of the enhanced PDCCH cluster time-frequency resource granularity.

Specifically, the resource granularity inside the Enhanced PDCCH is in the PRB unit in the frequency domain, and is in the time slot as the time slot. As shown in FIG. 7, in one subframe duration, one PRB has two internals. The minimum unit of resources of the enhance PDCCH, which is similar to the concept of CCE in LTE/LTE-A. The different aggregation levels in the enhanced PDCCH refer to the aggregation level of the above-mentioned enhanced PDCCH time-frequency resource granularity. The time slot inside the enhanced PDCCH resource may be The slot separation points in the PDSCH are different.

For example, in LTE/LTE-A, in the case of Normal CP (normal CP; CP: Cyclic Prefix, cyclic prefix), there are 14 OFDM symbols in one subframe, and 7 of the first slots (slots) OFDM symbol (0~6), there are 7 OFDM symbols (7~13) in the second subframe. Considering that the legacy PDCCH generally occupies 1~4 symbols, the slot position of the enhanced PDCCH may be different in the implementation. For example, the separation point of its time slot may be the position where the 8th OFDM symbol ends.

In the implementation, the base station transmits the scheduling information to the UE at the resource location of the enhanced PDCCH cluster, which may include:

When transmitting, the PDCCH resource occupied by the DL grant (downlink scheduling information) starts from the first PDCCH time-frequency resource of the enhanced PDCCH cluster;

And/or, the PDCCH resource occupied by the UL grant (uplink scheduling information) does not include the first PDCCH time-frequency resource of the enhanced PDCCH cluster.

A specific implementation manner of a method for allocating a search space of a cluster in the Enhanced PDCCH will be described below.

A) The Enhanced PDCCH search space is allocated based on the enhanced PDCCH cluster.

B), the PDCCH resource occupied by the DL grant always starts from the first PDCCH time-frequency resource of the enhanced PDCCH cluster, and FIG. 8 is a schematic diagram 1 of the PDCCH search space of the DL grant different time-frequency resource aggregation level, and the enhanced shown in the figure The time-frequency granularity of the PDCCH resource is as shown in FIG. 7, and the specific allocation is as shown in FIG. 8:

(1) If the aggregation level is 1, the PDCCH resource in the enhanced DCCH cluster occupied by the corresponding DL grant is { 1 };

(2) If the aggregation level is 2, the corresponding resource is {1, 2};

(3) If the aggregation level is 4, the corresponding resource is {1, 2, 3, 4};

(4) If the system supports and has an aggregation level of 8, the corresponding resources are {1, 2, 3, 4, 5, 6, 7, 8}.

The allocation is not limited to the previous method, you can also put the DL grant into In the second slot of the enhanced PDCCH cluster, another method is exemplified below.

Figure 9 shows the PDCCH search space of the DL grant with different time-frequency resource aggregation levels. The time-frequency granularity of the enhanced PDCCH resources shown in Figure 7 is as shown in Figure 7. The specific allocation is as shown in Figure 9:

(2) If the aggregation level is 2, the corresponding resource is {1, 3};

(3) If the aggregation level is 4, the corresponding resource is {1, 3, 5, 7};

(4) If the system supports and has an aggregation level of 8, the corresponding resource is {1,

3, 5, 7, 9, 11, 13, 15}.

The PDCCH resource occupied by the UL grant always does not include the first PDCCH time-frequency resource of the enhanced PDCCH cluster, and the search space can be allocated in the following manners as shown in the following embodiments 1 and 2:

Embodiment 1 FIG. 10 is a first schematic diagram of a PDCCH search space of a UL grant different time-frequency resource aggregation level. The time-frequency granularity of the enhanced PDCCH resource shown in the figure is as shown in FIG. 7 , and the specific allocation may be as shown in FIG. 10 . :

(1) If the aggregation level is 1, the corresponding UL grant occupies enhanced

The PDCCH resource in the DCCH cluster is {2};

(2) If the aggregation level is 2, the corresponding resource is {3, 4};

(3) If the aggregation level is 4, the corresponding resource is {5, 6, 7, 8};

(4) If the system supports and has an aggregation level of 8, the corresponding resource is {9, 10, 11, 12, 13, 14, 15, 16}.

Embodiment 2: The time-frequency granularity of the enhanced PDCCH resource is as shown in FIG. 7 , and may be:

(1) If the aggregation level is 1, the PDCCH resource in the enhanced DCCH cluster occupied by the corresponding UL grant is {2};

(2) If the aggregation level is 2, the corresponding resources are {3, 4} and {5, 6};

(3) If the aggregation level is 4, the corresponding resources are {3, 4, 5, 6} and {5, 6, 7, 8};

(4) If the system supports and has an aggregation level of 8, the corresponding resources are {5, 6, 7, 8, 9, 10, 11, 12} and {9, 10, 11, 12, 13, 14, 15 , 16}.

The UL grant can also be placed in the second slot of the enhanced PDCCH cluster. Figure 11 is a schematic diagram of the PDCCH search space of the UL grant different time-frequency resource aggregation levels. As shown in the figure, an implementation manner can be as follows:

(2) If the aggregation level is 2, the corresponding resource is {2, 4};

(3) If the aggregation level is 4, the corresponding resource is {2, 4, 6, 8};

(4) If the system supports and has an aggregation level of 8, the corresponding resource is {2, 4, 6, 8, 10, 12, 14, 16}.

In the implementation, when the UE performs blind detection on the resource location of the enhanced PDCCH cluster, it may be:

Determining the number of times of blind detection DL grant is: according to the PDCCH channel resource, the two DCI formats, and the number of enhanced PDCCH clusters of 4 candidates (candidates) in an enhanced PDCCH cluster;

And/or, determining the number of times of blind detection UL grant is: in the case of supporting UL-MIMO (uplink MIMO), according to an enhanced PDCCH cluster, there are 4 candidate PDCCH channel resources, two DCI formats, and an enhanced PDCCH cluster. The number is determined; in the case where UL-MIMO is not supported, the PDCCH channel with 4 candidates in an enhanced PDCCH cluster is described below by way of example.

Example 3:

For example, if two enhanced PDCCH clusters are configured in the system, each cluster has a size of 8 PRBs, and the system-defined aggregation level is { 1 , 2, 4, 8}, then the number of blind detections for the UE can be defined as :

A, DL grant: 4 * 2 * 2 = 16, 4 indicates that there are 4 in a cluster The candidate PDCCH channel resource, the first 2 indicates that two DCI formats need to be blindly detected, and the second 2 indicates two clusters.

B. The number of blind checks in the UL grant can be defined as follows according to the definition of different search spaces:

(1) A UL grant search space based on Embodiment 1.

UL grant in the case of supporting UL-MIMO: 4*2*2=16, 4 indicates that there are 4 candidate PDCCH channel resources in one cluster, and the first 2 indicates that two DCI formats need to be blindly checked. The second 2 represents two clusters.

UL grant in the case of not supporting UL-MIMO: 4* 1*2=8, 4 indicates that there are 4 candidate PDCCH channel resources in one cluster, 1 indicates that a DCI format needs to be blindly detected, and the second 2 means two clusters.

(2) The UL grant search space based on Embodiment 2.

UL grant in the case of supporting UL-MIMO: 7*2*2=28, 7 indicates that there are 4 candidate PDCCH channel resources in one cluster, and the first 2 indicates that two DCI formats need to be blindly checked. The second 2 represents two clusters.

UL grant in the case of not supporting UL-MIMO: 7*1 *2=14, 7 indicates that there are 4 candidate PDCCH channel resources in one cluster, 1 indicates that a DCI format needs to be blindly detected, and the second 2 means two clusters.

7 is calculated according to the number of candidate PDCCH resources and is an example of the current scenario.

Then, in the case where the cluster is 2, the total number of blind detections of the UE in the enhanced PDCCH search space is:

Based on the UL grant search space of Embodiment 1:

Support UL-MIMO: 16 (the number of blind checks for DL grant) +16 (the number of blind checks for UL grant) =32;

UL-MIMO is not supported: 16 (the number of blind checks for DL grant) +8 (the number of blind checks for UL grant) = 24.

Based on the UL grant search space of Embodiment 2:

Support UL-MIMO: 16 (the number of blind checks for DL grant) +28 (UL grant Number of blind checks) =44;

UL-MIMO is not supported: 16 (the number of blind checks for DL grant) +14 (the number of blind checks for UL grant) = 30.

In a specific implementation, the number of different clusters, the number of aggregation levels supported by the system, and the number of candidate PDCCH channel resources in each aggregation level may cause the total number of blind detections of the PDCCH to be different. The above embodiments are only used to teach the person skilled in the art how to implement the invention, but it is not meant to be only those methods, and the corresponding manner can be determined in the implementation process in combination with practical needs.

In a specific implementation, for an idle PRB resource in the Enhanced PDCCH, it can be used to transmit the PDSCH. Since the base station always knows the situation that the enhanced PDCCH resources of all the users are occupied, it can use the idle PRB resources in the enhanced PDCCH for the transmission of the PDSCH.

The PDCCH is not used in the enhanced PDCCH. In this case, if there is no PDCCH transmission, the PRB in the enhanced PDCCH resource can also be used for the transmission of the PDSCH, which can effectively improve the utilization of the enhanced PDCCH resource. The entire resource utilization of the system.

Based on the same inventive concept, a base station and a user equipment are also provided in the embodiment of the present invention. The principle of solving the problem is similar to the method for transmitting and receiving information on a physical downlink control channel. Therefore, the implementation of these devices can refer to the method. Implementation, repetition will not be repeated.

12 is a schematic structural diagram of a base station. As shown in the figure, the base station may include: an indication module 1201, configured to indicate, to the UE, a resource location of an enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs;

The transmitting module 1202 is configured to transmit scheduling information to the UE at a resource location of the enhanced PDCCH cluster.

In an implementation, one or a combination of the following units may be included in the indication module, where: a first indication unit, configured to indicate a resource location occupied by the enhanced PDCCH cluster, where the resource is continuous or discontinuous;

a second indication unit, configured to indicate to the UE by indicating a starting PRB number position of the first enhanced PDCCH cluster, and by using another signaling indication or by specifying a frequency domain interval between different enhanced PDCCH clusters by using a protocol;

And a third indication unit, configured to indicate to the UE by indicating a starting PRB number position of each enhanced PDCCH cluster.

In an implementation, the indication module may be further used to indicate that the PRB number is a fixed enhanced PDCCH cluster or an enhanced PDCCH cluster configured by signaling.

In an implementation, the indication module may be further configured to indicate that the internal resource granularity is in units of PRBs in the frequency domain, and in time slots in units of time slots. In one subframe duration, two PRBs have internal enhancements. The minimum unit of the PDCCH cluster resource. The different aggregation level in the enhanced PDCCH cluster refers to the enhanced PDCCH cluster of the aggregation level of the enhanced PDCCH cluster time-frequency resource granularity.

In an implementation, the transmission module may be further configured to: when the scheduling information is transmitted to the UE at the resource location of the enhanced PDCCH cluster, the PDCCH resource occupied by the DL grant starts from the first PDCCH time-frequency resource of the enhanced PDCCH cluster; and/or, UL The PDCCH resource occupied by the grant does not include the first PDCCH time-frequency resource of the enhanced PDCCH cluster.

FIG. 13 is a schematic structural diagram of a user equipment. As shown in the figure, the UE may include: a determining module 1301, configured to determine, according to an indication of a base station, a resource location of an enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs. ;

The blind detection module 1302 is configured to perform blind detection on the resource location of the enhanced PDCCH cluster to receive scheduling information that is transmitted by the base station to the UE.

In an implementation, the determining module may include one or a combination of the following units, where: a first determining unit, configured to determine, according to a resource location occupied by an enhanced PDCCH cluster indicated by the base station, the resource location, where the resource is continuous or discontinuous; and a second determining unit, configured to use, according to the first enhanced PDCCH cluster indicated by the base station The starting point PRB number location, and the resource location determined by another signaling of the base station or by a frequency domain interval between different enhanced PDCCH clusters specified by the protocol;

And a third determining unit, configured to determine a resource location according to a starting point PRB number position of each enhanced PDCCH cluster indicated by the base station.

In an implementation, the determining module may be further configured to determine that the PRB number is a fixed enhanced PDCCH cluster or an enhanced PDCCH cluster configured by signaling.

In the implementation, the determining module may be further configured to determine that the internal resource granularity is in the PRB unit in the frequency domain, and is in the time slot as the time slot. In one subframe duration, one PRB has two enhances inside. The minimum unit of the PDCCH cluster resource. The different aggregation level in the enhanced PDCCH cluster refers to the enhanced PDCCH cluster of the aggregation level of the enhanced PDCCH cluster time-frequency resource granularity.

In the implementation, the blind detection module may be further configured to: when the blind detection is performed on the resource location of the enhanced PDCCH cluster, determine the number of blind detection DL grants: according to an enhanced PDCCH cluster, there are 4 candidate PDCCH channel resources, and two types. The DCI format and the number of enhanced PDCCH clusters are determined; and/or, the number of times of blind detection UL grant is determined as follows: In the case of supporting UL-MIMO, there are 4 candidate PDCCH channel resources in an enhanced PDCCH cluster, and two The DCI format and the number of enhanced PDCCH clusters are determined; if UL-MIMO is not supported, it is determined according to the number of PDCCH channel resources, one DCI format, and the number of enhanced PDCCH clusters of four candidates in an enhanced PDCCH cluster.

For convenience of description, the various parts of the above described devices are described in terms of functions divided into various modules or units. Of course, each module or unit can be implemented in the practice of the invention. The functionality is implemented in the same software or hardware.

It can be seen from the above embodiments that an enhanced PDCCH information transmission scheme based on FDM (Frequency Division Multiplexing) is proposed in the embodiment of the present invention, which can effectively improve the capacity of the PDCCH and effectively improve the enhanced PDCCH. Utilization of PDCCH resources.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of a method, a device (system), and a computer program product in accordance with an embodiment of the present invention. It will be understood that each flow and/or block of the flowcharts and/or block diagrams, and combinations of flow and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. Instructions are provided for implementing a process or multiple processes and/or parties in a flowchart Block diagram The steps of a function specified in a box or multiple boxes.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and Without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

A physical downlink control channel information transmission method on a PDCCH, which is characterized in that the method includes the following steps:

The base station indicates, to the user equipment UE, a resource location of an enhanced PDCCH cluster enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of physical resource blocks PRB;

The base station transmits a scheduling signal to the UE at the resource location of the enhanced PDCCH cluster.

The method according to claim 1, wherein the base station indicates to the UE the resource location of the enhanced PDCCH cluster that constitutes the enhanced PDCCH, including:

Indicates the resource location occupied by the enhanced PDCCH cluster, whose resources are continuous or discontinuous;

Or indicating to the UE by indicating a starting PRB number position of the first enhanced PDCCH cluster, and indicating a frequency domain interval between different enhanced PDCCH clusters by another signaling indication or by a protocol;

Or, indicating to the UE by indicating the start PRB number position of each enhanced PDCCH cluster, respectively.

3. The method according to claim 1, wherein the number of PRBs in the enhanced PDCCH cluster is fixed or configured by signaling.

The method according to claim 1, wherein the granularity of resources in the enhanced PDCCH cluster is in units of PRBs in the frequency domain, and is in units of time slots in the time domain, in a subframe duration. The minimum unit of resources of two enlive PDCCH clusters in a PRB. The different aggregation level in the enhanced PDCCH cluster refers to the aggregation level of the time-frequency resource granularity of the enhanced PDCCH cluster.

The method according to any one of claims 1 to 4, wherein the base station transmits the scheduling information to the UE at the resource location of the enhanced PDCCH cluster, including: when transmitting, the PDCCH resource occupied by the downlink scheduling information DL grant is The first PDCCH time-frequency resource of the enhanced PDCCH cluster starts; And/or, the PDCCH resource occupied by the uplink scheduling information UL grant does not include the first PDCCH time-frequency resource of the enhanced PDCCH cluster.

A method for receiving information on a PDCCH, comprising: the following steps:

The UE determines, according to an indication of the base station, a resource location of an enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs;

The UE performs a blind check on the resource location of the enhanced PDCCH cluster to receive scheduling information transmitted by the base station to the UE.

The method according to claim 6, wherein the determining, by the UE, the resource location of the enhanced PDCCH cluster that constitutes the enhanced PDCCH according to the indication of the base station, includes: determining, according to the resource location occupied by the enhanced PDCCH cluster indicated by the base station, the resource is Continuous or discontinuous;

Or determining, according to a starting PRB number position of the first enhanced PDCCH cluster indicated by the base station, and a frequency domain interval between different enhanced PDCCH clusters indicated by another signaling of the base station or by a protocol;

Or determining according to the starting point PRB number position of each enhanced PDCCH cluster indicated by the base station.

The method according to claim 6, wherein the number of PRBs in the enhanced PDCCH cluster is fixed or configured by signaling.

The method according to claim 6, wherein the granularity of resources in the enhanced PDCCH cluster is in units of PRBs in the frequency domain, and is in units of time slots in the time domain, in a subframe duration. The minimum unit of resources of two enlive PDCCH clusters in a PRB. The different aggregation level in the enhanced PDCCH cluster refers to the aggregation level of the time-frequency resource granularity of the enhanced PDCCH cluster.

The method according to any one of claims 6 to 9, wherein when the UE performs blind detection on the resource location of the enhanced PDCCH cluster,

The number of times of determining the DL grant for blind detection is: according to the PDCCH channel resource of 4 candidates in an enhanced PDCCH cluster, the two DCI formats, and the number of enhanced PDCCH clusters; And/or, determining the number of times of blind detection UL grant is as follows: In the case of supporting uplink multiple input and multiple UL-MIMO, according to an enhanced PDCCH cluster, there are four candidate candidate PDCCH channel resources, and two downlink control information DCI formats. And determining the number of enhanced PDCCH clusters; if UL-MIMO is not supported, there are 4 candidate PDCCH channels in an enhanced PDCCH cluster

A base station, comprising:

The indication module is configured to indicate, to the UE, a resource location of an enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs, and a transmission module, configured to transmit scheduling information to the UE at a resource location of the enhanced PDCCH cluster.

The base station according to claim 11, wherein the indication module comprises one or a combination of the following units, wherein:

a first indication unit, configured to indicate a resource location occupied by the enhanced PDCCH cluster, where the resource is continuous or discontinuous;

a second indicating unit, configured to indicate a starting point PRB of each enhanced PDCCH cluster by indicating a starting PRB number position of the first enhanced PDCCH cluster, and by using another signaling indication or by using a different third indicating unit by using a protocol The numbered location is indicated to the UE.

The base station according to claim 11, wherein the indication module is further configured to indicate that the PRB number is a fixed enhanced PDCCH cluster or an enhanced PDCCH cluster configured by using a signaling.

The base station according to claim 11, wherein the indication module is further configured to indicate that the internal resource granularity is in units of PRBs in the frequency domain, and in time slots in units of time slots, in one subframe. In the duration, the minimum unit of resources of the two honour PDCCH clusters in a PRB is different. The aggregation level in the enhanced PDCCH cluster refers to the enhanced PDCCH cluster of the aggregation level of the PDCCH cluster.

The base station according to any one of claims 11 to 14, wherein the transmission module is further configured to: when the scheduling information is transmitted to the UE at the resource location of the enhanced PDCCH cluster, the PDCCH resource occupied by the DL grant is from the enhanced PDCCH cluster The first PDCCH time-frequency resource starts; and/or, the PDCCH resource occupied by the UL grant does not include the first PDCCH time-frequency resource of the enhanced PDCCH cluster.

16. A user equipment, comprising:

a determining module, configured to determine, according to an indication of the base station, a resource location of an enhanced PDCCH cluster that constitutes an enhanced PDCCH, where the enhanced PDCCH cluster is a set of PRBs;

The blind detection module is configured to perform blind detection on a resource location of the enhanced PDCCH cluster to receive scheduling information that is transmitted by the base station to the UE.

The user equipment according to claim 16, wherein the determining module comprises one or a combination of the following units, wherein:

a first determining unit, configured to determine, according to a resource location occupied by the enhanced PDCCH cluster indicated by the base station, the resource location, where the resource is continuous or discontinuous;

a second determining unit, configured, according to a starting point PRB number position of the first enhanced PDCCH cluster indicated by the base station, and a source location indicated by another signaling of the base station;

The user equipment according to claim 16, wherein the determining module is further configured to determine that the PRB number is a fixed enhanced PDCCH cluster or an enhanced PDCCH cluster configured by a signaling.

The user equipment according to claim 16, wherein the determining module is further configured to determine that the internal resource granularity is in units of PRBs in the frequency domain and time slots in the time domain, in one sub- In the frame duration, the minimum unit of resources of two enhancement PDCCH clusters within one PRB, and the different aggregation level in the enhanced PDCCH cluster refers to the aggregation level of the time-frequency resource granularity of the enhanced PDCCH cluster. Enhanced PDCCH cluster.

The user equipment according to any one of claims 16 to 19, wherein the blind detection module is further configured to: when performing blind detection on the resource location of the enhanced PDCCH cluster, determine the number of blind detection DL grants as follows: In the enhanced PDCCH cluster, there are four candidate PDCCH channel resources, two DCI formats, and the number of enhanced PDCCH clusters; and/or, the number of times of blind detection UL grant is determined as follows: In the case of supporting UL-MIMO, according to one The enhanced PDCCH cluster has four candidate PDCCH channel resources, two DCI formats, and the number of enhanced PDCCH clusters. If UL-MIMO is not supported, there are four candidate PDCCH channel resources in an enhanced PDCCH cluster. , a DCI format and the number of enhanced PDCCH clusters.