WO2014019234A1 - Method for sending and receiving control information and apparatus thereof - Google Patents

Abstract

The embodiment of the present invention provides a method for sending and receiving control information and an apparatus thereof. Wherein, the sending method comprises: for any of the user equipment in the set of user equipments, a base station, on the basis a physical resource set 2 assigned to the user equipment, determines a physical resource subset corresponding to one or more candidate downlink control channels with an aggregation class L of the user equipment from multiple physical resource subsets included by a physical resource set 1; the physical resource included by every physical resource subset can hold one candidate downlink control channel with an aggregation class L, the physical resource set 2 is a subset of the physical resource set 1; in a determined physical resource subset control information born in the downlink control channel with the aggregation class L is sent to the user equipment. The embodiment of the present invention decreases the probability of resource location conflicts within the mappings of candidate downlink control channels of different user equipments.

Description

 Control information transmitting method, receiving method and device

 TECHNICAL FIELD Embodiments of the present invention relate to communication technologies, and in particular, to a control information transmission method, a reception method, and an apparatus.

Background technique

 In the evolution of the Long Term Evolution (LTE) system, multi-user equipment Multiple Input Multiple Output (MIMO) and coordination between multiple cells are needed to improve system performance. The number of scheduled user equipments increases; however, the capacity of the existing Physical Downlink Control Channel (PDCCH) limits the number of user equipments that can be scheduled in one subframe. Based on this, the existing PDCCH is enhanced, that is, a part of resources are allocated in the original Physical Downlink Shared Channel (PDSCH) region to transmit an enhanced PDCCH (evolved PDCCH, ePDCCH) to improve the control channel. The capacity or shared channel simultaneously schedules the number of user equipment. Each ePDCCH is composed of an enhanced control channel element (eCCE) represented by L (L is a logical unit aggregation level). An eCCE is mapped to a set of RE (resource elements). The L eCCEs form a candidate ePDCCH with an aggregation level of L. The aggregation level L corresponding to each user equipment has M candidate ePDCCHs. The M candidate ePDCCHs constitute a search space with an aggregation level L corresponding to the user equipment. The LxM eCCEs that make up the search space of the aggregation level L are mapped to the LxM RE sets. For ePDCCH, the aggregation level L corresponding to each user equipment may be the same as the PDCCH, and may be other values if 1 or 2 or 4 or 8. If there are one type of value for the same user equipment L, the user equipment has one search space. The user equipment detects its own ePDCCH on the physical resources corresponding to all its search spaces.

The resource scheduling of the user's ePDCCH is performed on the LTE frequency domain resource in units of a resource block pair (RB pair). Each RB pair occupies 12 subcarriers in the frequency domain, and various reference signals (Reference Signals, referred to as RSs) occupy resource units (Resource) Element, referred to as RE). In order to ensure the correct reception probability of the ePDCCH, the number of REs occupied by each eCCE, that is, the number of REs may be similar to the 36 REs occupied by the CCEs in the PDCCH domain, or may be other sizes according to actual design requirements.

 When the base station transmits the control information of the ePDCCH bearer to the user equipment, the user equipment is allocated a plurality of resource block pairs, and then the multiple candidate ePDCCHs of the user equipment, that is, the search space of the user equipment, are mapped to the resource block pairs, and then The resource blocks send scheduling information to the user equipment, and the user equipment blindly detects its own ePDCCH in the search space composed of its own candidate ePDCCH. The existing technical solution maps the candidate ePDCCH to the resource block pair allocated to the user equipment, and may cause another user equipment when the ePDCCH of one user equipment is transmitted. The resource locations of the multiple candidate ePDCCHs are reduced, so that the number of available candidate ePDCCHs of another user equipment is reduced, which reduces the ePDCCH scheduling flexibility of another user equipment, thereby reducing the transmission performance of the entire ePDCCH. Summary of the invention

 The embodiments of the present invention provide a control information sending method, a receiving method, and a device, which are used to reduce the probability of resource location conflicts corresponding to candidate downlink control channels of different user equipments.

 In one aspect, the embodiment of the present invention provides a method for sending control information, including:

 For any user equipment in the user equipment set, the base station determines, according to the physical resource set 2 allocated to the user equipment, a plurality of physical resource subsets included in the physical resource set 1, and determines that the aggregation level corresponding to the user equipment is L. a physical resource subset corresponding to one or more candidate downlink control channels; a physical resource included in each physical resource subset included in the physical resource set 1 can accommodate one candidate downlink control channel with an aggregation level L, and the physical resource set 2 is a subset of the physical resource set 1;

 And determining, by the base station, control information carried by the downlink control channel with the aggregation level L, to the user equipment, on the determined one of the physical resource subsets.

In an aspect, the embodiment of the present invention further provides a method for receiving control information, including: any one of user equipment sets, according to a physical resource set 2 of the user equipment, and multiple physical entities included in the physical resource set 1 Determining, by the subset of resources, a physical resource subset corresponding to one or more candidate downlink control channels whose aggregation level is L corresponding to the user equipment; physical resource resources included in each physical resource subset included in the physical resource set 1 Sufficient to accommodate one candidate downlink control channel with an aggregation level L, and physical resource set 2 is a subset of the physical resource set 1;

 The user equipment searches for control information carried by the downlink control channel sent by the base station to the user equipment on the determined subset of the physical resources.

 In an aspect, the embodiment of the present invention further provides a control information sending apparatus, including: a determining module, configured to: for a user equipment set in a user equipment set, according to a physical resource set 2 allocated to the user equipment, in a physical resource set Determining, by the plurality of physical resource subsets, a subset of physical resources corresponding to one or more candidate downlink control channels with an aggregation level of L corresponding to the user equipment, and sending the determined subset of physical resources to the sending module; The physical resource included in each physical resource subset included in the resource set 1 can accommodate one candidate downlink control channel with an aggregation level L, and the physical resource set 2 is a subset of the physical resource set 1;

 The sending module is configured to send control information carried by the downlink control channel of the aggregation level L to the user equipment on a subset of the physical resources sent by the determining module.

 In an aspect, the embodiment of the present invention further provides a control information receiving apparatus, including: a determining module, configured to use, according to a physical resource set 2 of the user equipment, a plurality of physical resource subsets included in the physical resource set 1 Determining, by the user equipment, a physical resource subset corresponding to one or more candidate downlink control channels of an aggregation level L, and sending the determined physical resource subset to the search module; each physical medium included in the physical resource set 1 The physical resource included in the resource subset can accommodate one candidate downlink control channel with an aggregation level L, and the physical resource set 2 is a subset of the physical resource set 1;

 The search module is configured to search for control information carried by the downlink control channel sent by the base station to the user equipment on a subset of all physical resources sent by the determining module.

In the foregoing technical solutions provided by the embodiments of the present invention, for different user equipments having a downlink control channel with an aggregation level of L, the physical resource subsets 1 used by the user equipment to transmit the downlink control channel are the same, that is, aligned. of. Therefore, the base station reduces the resource location of the candidate downlink control channel of the user equipment and the candidate of other user equipment after the candidate downlink control channel of the user equipment is corresponding to the physical resource subset according to the physical resource set 2 allocated to the user equipment. The number of conflicts in the resource location of the downlink control channel reduces the number of other base stations occupied. The probability that the candidate resource location of the downlink control channel of the user equipment transmits the downlink control channel of the user equipment increases the candidate resource location that can be used when the user equipment transmits the downlink control channel. Therefore, the embodiment of the invention reduces the probability of collision of candidate resource locations of downlink control channels between different user equipments, and improves transmission efficiency.

 On the other hand, an embodiment of the present invention provides a method for transmitting control information, including: determining, by a base station, N candidate downlink controls of an aggregation level corresponding to L of the user equipment in the N physical resource subsets included in the physical resource set A a channel--a corresponding subset of physical resources; the physical resource set A is a set of physical resources allocated to the user equipment; the base station sends a downlink to the user equipment on a subset of the physical resources Control information carried by the control channel.

 On the other hand, the embodiment of the present invention further provides a control information receiving method, including: the user equipment determines, in the N physical resource subsets included in the physical resource set A, N candidates whose aggregation level is L corresponding to the user equipment. a downlink control channel, a corresponding subset of physical resources; the physical resource set A is a set of physical resources allocated by the base station to the user equipment;

 The user equipment searches for control information carried by the downlink control channel sent by the base station to the user equipment on the N subsets of the physical resources.

 On the other hand, the embodiment of the present invention further provides a control information sending apparatus, including: a determining module, configured to determine, in an N physical resource subset included in the physical resource set A, that the aggregation level corresponding to the user equipment is L The N candidate downlink control channels, the corresponding subset of the physical resources, and the corresponding subset of the physical resources are sent to the sending module; the physical resource set A is a set of physical resources allocated by the device for the user equipment;

 And a sending module, configured to send, to the user equipment, control information carried by the downlink control channel, on the one of the physical resource subsets sent by the determining module.

On the other hand, the embodiment of the present invention further provides a control information receiving apparatus, including: a determining module, configured to determine, according to the N physical resource subsets included in the physical resource set A, an aggregation level corresponding to the control information receiving apparatus The N candidate downlink control channels of the L are corresponding to the physical resource subsets, and the N candidate downlink control channels of the aggregation level L corresponding to the control information receiving device are sent to the search module. The physical resource set A is composed of physical resources allocated by the base station to the control information receiving apparatus. The search module is configured to search, on a subset of physical resources sent by the determining module, control information carried by the downlink control channel sent by the base station to the user equipment.

 With the above technical solution, each candidate downlink control channel of the user equipment is dispersed and mapped to different physical resource subsets instead of being mapped to the same physical resource, so that the downlink control channel of the user equipment has more candidate resources. The location gives the user device more opportunities to get a faster transfer rate.

 In another aspect, the embodiment of the present invention further provides a method for sending control information, including: determining, by the base station, a physical resource set 2 allocated to the user equipment, corresponding to the user equipment a physical resource subset corresponding to one or more candidate downlink control channels of the aggregation level L; the number of physical resource units corresponding to the candidate downlink control channel is R; and the starting physical resource unit of the physical resource subset is The Q+X physical resource unit in the physical resource set 1, the physical resource set 1 includes Y physical resource units, and the physical resource subset includes R physical resource units; the Q can be divisible by R, X Is an integer, X is greater than or equal to 1, less than or equal to Y; the physical resource set 2 is a subset of the physical resource set 1;

 And determining, by the base station, control information carried by the downlink control channel with the aggregation level L, to the user equipment, on the determined one of the physical resource subsets.

 In another aspect, the embodiment of the present invention further provides a control information receiving method, including: the user equipment determines, according to the physical resource set 2 allocated by the base station to the user equipment, one or more aggregation levels corresponding to the user equipment. a subset of physical resource resources corresponding to the candidate downlink control channel; the number of physical resource units corresponding to the candidate downlink control channel is R; the starting physical resource unit of the physical resource subset is the Q in the physical resource set 1 +X physical resource units, the physical resource set 1 includes Y physical resource units, the physical resource subset includes R physical resource units; the Q can be divisible by R, X is an integer, and X is greater than or equal to 1, The physical resource set 2 is a subset of the physical resource set 1; the user equipment search base station sends a downlink control with an aggregation level of L to the user equipment on the determined subset of all physical resources. Control information carried by the channel.

In another aspect, the embodiment of the present invention further provides a control information sending apparatus, including: a determining module, configured to: for any one of user equipment sets, according to the The physical resource set 2 allocated by the user equipment, the physical resource subset corresponding to one or more candidate downlink control channels whose aggregation level is L corresponding to the user equipment, and the determined physical resource subset is sent to the sending module; The number of physical resource units corresponding to the candidate downlink control channel is R; the starting physical resource unit of the physical resource subset is the Q+X physical resource unit in the physical resource set 1, and the physical resource set 1 includes Y physical resource units, the physical resource subset includes R physical resource units; the Q can be divisible by R, X is an integer, X is greater than or equal to 1, less than or equal to Y; and the physical resource set 2 is the physical a subset of resource set 1;

 The sending module is configured to send, to the user equipment, control information carried by a downlink control channel with an aggregation level L, on a physical resource subset corresponding to the candidate downlink control channel sent by the determining module.

 In another aspect, the embodiment of the present invention further provides a control information receiving apparatus, including: a determining module, configured to determine, according to a physical resource set 2 allocated by the base station to the control information receiving apparatus, an aggregation corresponding to the control information receiving apparatus. a subset of physical resources corresponding to one or more candidate downlink control channels of the level L, and sending the corresponding subset of physical resources to the search module; the number of physical resource units determined by the candidate downlink control channel is R; The starting physical resource unit of the physical resource subset is the Q+X physical resource unit in the physical resource set 1, the physical resource set 1 includes Y physical resource units, and the physical resource subset includes R physical units. a resource unit; the Q can be divisible by R, X is an integer, X is greater than or equal to 1, less than or equal to Y; and the physical resource set 2 is a subset of the physical resource set 1;

 The search module is configured to search, on a subset of all physical resources sent by the determining module, the base station to send control information carried by the downlink control channel with an aggregation level L to the control information receiving apparatus.

In the foregoing technical solution, for all the user equipments in the user equipment set, the physical resource subsets of the candidate downlink control channels corresponding to the aggregation level L are aligned, and the base station occupies the candidate downlink control channel to the physical resource subset, and the base station occupies The probability that the candidate resource location of the downlink control channel of one user equipment transmits the downlink control channel of another user equipment is reduced, and the candidate resource location that can be used when another user equipment transmits the downlink control channel is increased. Therefore, this embodiment reduces the probability of collision of candidate resource locations of downlink control channels between different user equipments, and improves transmission efficiency. DRAWINGS

 FIG. 1 is a flowchart of a method for sending control information according to an embodiment of the present invention;

 FIG. 1B is a schematic diagram of an application scenario according to an embodiment of the present invention;

 FIG. 2 is a flowchart of another method for transmitting control information according to an embodiment of the present invention; FIG. 2B to FIG. 2D are respectively a flowchart of an application scenario according to an embodiment of the present invention;

 2E is a flowchart of still another method for transmitting control information according to an embodiment of the present invention; FIG. 2F is a schematic diagram of an application scenario according to an embodiment of the present invention;

 FIG. 3 is a flowchart of a method for receiving control information according to an embodiment of the present invention;

 4 is a schematic structural diagram of a control information sending apparatus according to an embodiment of the present invention; FIG. 5 is a schematic structural diagram of a control information receiving apparatus according to an embodiment of the present invention; FIG. 6A is still another control information according to an embodiment of the present invention; FIG. 6B to FIG. 6C are respectively used application scene diagrams according to an embodiment of the present invention;

 FIG. 7 is a flowchart of another method for controlling control information according to an embodiment of the present invention; FIG. 8 is a schematic structural diagram of another apparatus for transmitting control information according to an embodiment of the present invention; FIG. 10A is a flowchart of still another method for transmitting control information according to an embodiment of the present invention; FIG. 10B is a flowchart of an application scenario of FIG. 10A according to an embodiment of the present invention;

 FIG. 11 is a schematic structural diagram of still another control information sending apparatus according to an embodiment of the present invention. Detailed ways

In the downlink transmission of the LTE communication system, the evolved Node B (eNB) will send a Physical Downlink Shared Channel (PDSCH) and corresponding to each scheduled user equipment according to the scheduling result. The PDCCH, where the PDSCH carries the data sent by the eNB to the scheduling user equipment, and the PDCCH carries the scheduling information of the corresponding PDSCH, where the scheduling information is mainly used to indicate the transmission format information of the PDSCH corresponding thereto, including resource allocation and transmission block. Size, modulation and coding scheme, transmission rank, and precoding matrix information. The PDCCH may also carry control information such as uplink scheduling information and random access information. The PDCCH and the PDSCH are time division multiplexed in one subframe. In one subframe, all PDCCHs of the scheduling user equipment are multiplexed together, and then in the PDCCH region. The domain is sent. Each PDCCH is composed of 1/2/4/8 Control Channel Elements (CCEs), wherein the number of CCEs constituting each PDCCH is determined by the size of the PDCCH and the channel information of the user equipment corresponding to the PDCCH. determine. The ePDCCH is a transmission enhanced PDCCH. One aggregation level of the downlink control channel of the user equipment includes a plurality of candidate control channels, which are candidate resources that can be used to transmit the control channel. In a specific primary control channel transmission, if the aggregation level of the transmitted control channel is L, the transmitted control channel is transmitted on one of the plurality of candidate control channels of the aggregation level L.

 FIG. 1A is a flowchart of a method for sending control information according to an embodiment of the present invention. As shown in FIG. 1A, the method provided in this embodiment includes:

 Step 11: For any user equipment in the user equipment set, the base station determines, according to the physical resource set 2 allocated to the user equipment, a plurality of physical resource subsets included in the physical resource set 1, and determines one of the aggregation levels corresponding to the user equipment. Or a subset of physical resources corresponding to the candidate downlink control channels; each physical resource subset includes physical resources capable of accommodating one candidate downlink control channel with an aggregation level L, and physical resource set 2 is a subset of physical resource set 1 . The physical resource included in each physical resource subset included in the physical resource set 1 can accommodate a candidate downlink control channel with an aggregation level of L.

 According to an aggregation level L of the downlink control channel of all user equipments in the user equipment set, the base station divides the physical resource set 1 into N physical resource subsets, and the user equipment in the user equipment set is part of the physical resource set 1 or A downlink control channel is transmitted on all resources, and a physical resource included in each physical resource subset can accommodate one candidate downlink control channel with an aggregation level of L.

In the embodiment of the present invention, the downlink control channel may be a PDCCH or an ePDCCH. The downlink control channel of each user equipment may have one or more aggregation levels. The downlink control channel of all user equipments in the user equipment set has an aggregation level of L, that is, all user equipments in the user equipment set have a downlink control channel with an aggregation level of L. The user equipment in the foregoing user equipment set transmits a downlink control channel on some physical resources or all physical resources in the physical resource set 1. The user equipment set may be a set of all user equipments in the cell, or may be a set of all user equipments in the cell that receive the downlink control channel capability; or may be a set of user equipments selected according to the base station; or may be in the same A set of user equipments that receive downlink control channels on a carrier.

 The physical resource set 1 may be a set of all physical resources included in the system bandwidth, or may be a set of physical resources included in the system bandwidth, except for physical resources other than the physical resources that the system cannot transmit the downlink control channel. It is a collection of physical resources that are well known to the base station and user equipment. Some resources that cannot transmit the downlink control channel may be PBCH domains or private bandwidths of some special transmission types, such as MTC (Machine-Type Communications) proprietary bandwidth. The physical resource included in the physical resource set may be a resource block ^3" (PRB pair), an enhanced control channel element (eCCE) or an enhanced resource element group (eREG).

 The physical resource set 1 includes a plurality of physical resource subsets, and each physical resource subset includes physical resources capable of accommodating a candidate downlink control channel with an aggregation level of L. Specifically, the base station divides the physical resource set 1 into multiple physical resource subsets according to the foregoing aggregation level L. The physical resource of the candidate downlink control channel corresponding to the aggregation level L is the same for the different user equipments in the user equipment set. The subset is aligned.

 There are various methods for a base station to divide a physical resource set, as long as each divided physical resource subset satisfies the following conditions: The divided physical resources include a physical resource that can accommodate a candidate downlink control with an aggregation level of L. The channel, that is, the number of physical resources included in each physical resource subset is greater than or equal to the number of physical resources occupied by the candidate ePDCCH with the aggregation level L. The physical resource subset may be a collection of physical eCCEs; or may be a collection of physical eREGs (enhanced resource element groups); the physical resources included in the physical resource subsets may be physically continuous or discrete.

 A user equipment may have one or more candidate ePDCCHs at one aggregation level. For any one of the user equipment sets, the base station corresponds to one or more candidate downlink control channels of the user equipment with an aggregation level of L according to the physical resource set 2 composed of the physical resources allocated to the user equipment. In the physical resource subset, the physical resource set 2 is a subset of the physical resource set 1.

The base station may be based on the number of physical resource subsets included in the physical resource set 2 of the user equipment in the N physical resource subsets. It can also be included in the starting position of the N physical resource subsets. The number of physical resource subsets in the physical resource set of the user equipment, and the one or more candidate downlink control channels corresponding to the aggregation level of the user equipment are corresponding to the physical resource subset of the N physical resource subsets, and the mapped The physical resource subset is the resource location of the candidate downlink control channel, that is, the candidate resource location of the downlink control channel.

 Step 12: On the determined one of the physical resource subsets, the base station sends control information carried by the downlink control channel with the aggregation level L to the user equipment.

 The aggregation level L corresponding to the user equipment may have multiple candidate downlink control channels mapped to the physical resource subset, and the base station sends the downlink control with the aggregation level L to the user equipment only on the physical resource subset corresponding to the candidate downlink control channel. Control information carried by the channel.

 Physical resource physical resource set 1 A method of dividing into N physical resource subsets and/or a method of mapping candidate ePDCCHs to candidate physical resource subsets of N physical resource subsets may be cell-specific, and each cell is different .

 As shown in FIG. 1B, the resource block pair allocated by the base station to user equipment 1 (UE1) is 1, 2, 3,

4. The resource block pair allocated for User Equipment 2 (UE2) is 2, 3, 4, 5, 6, 7, 8. The physical resource set 1 consists of resource block pairs 1, 2, 3, 4, 5, 6, 7, 8, 9, and 10. UE1 and

UE2 transmits the ePDCCH on the physical resource set 1. UE1 has two candidate ePDCCHs with an aggregation level of 8, and UE2 has three candidate ePDCCHs with an aggregation level of 8.

 If the base station adopts a method of directly mapping the candidate ePDCCH of the user equipment to the resource block pair allocated for the user equipment, but does not divide the physical resource set 1, for each user equipment, for each corresponding candidate ePDCCH The subset of physical resources are all the same, that is, aligned. As shown in the left part of FIG. 1B, the two selected ePDCCHs of UE1 are respectively mapped to the resource block pairs 1 and 2, 3 and 4 allocated for UE1, and the three 4-selected ePDCCHs of UE2 are respectively mapped to UE2. The allocated resource blocks are 3 and 4, 5 and 6, 7 and 8. Therefore, the first candidate position of the ePDCCH of the UE1 is the resource block pair 1 and 2, and the second candidate position is 3 and 4. Similarly, the first candidate position of the ePDCCH of the UE2 is the resource block pair 3 and 4, and the second The candidate positions are 5 and 6, and the third candidate positions are 7 and 8. Then, when the ePDCCH of UE1 is transmitted at the first candidate location, the ePDCCH of UE2 cannot be transmitted in the first candidate location and the second candidate location, and can only be transmitted in the third candidate location.

As shown in the right part of FIG. 1B, the base station divides the physical resource set 1 into four physical eCCE subsets by using the method provided in this embodiment, and then separately selects two candidate ePDCCHs of UE1. Corresponding to physical eCCE subset 1 and physical eCCE subset 2, the resource location of one candidate ePDCCH of UE1 is physical eCCE subset 1, and the resource location of another candidate ePDCCH is physical eCCE subset 2. The three candidate ePDCCHs of the UE2 are respectively mapped to the physical eCCE subset 2, the physical eCCE subset 3, and the physical eCCE subset 4. The resource location of one candidate ePDCCH of the UE2 is the physical eCCE subset 2, and the resource location of the other candidate ePDCCH. For physical eCCE subset 3, the resource location of another candidate ePDCCH is physical eCCE subset 4. Therefore, the candidate resource locations of the ePDCCH of the UE1 are the physical eCCE subset 1 and the physical eCCE subset 2, and the candidate resource locations of the UE2 ePDCCH are the physical eCCE subset 2, the physical eCCE subset 3, and the physical eCCE subset 4. Then, when the ePDCCH of the UE1 is transmitted on the first candidate resource location, that is, the physical eCCE subset 1, the ePDCCH of the UE2 cannot be transmitted on the first candidate resource location, that is, the physical eCCE subset 1, but may be in the physical eCCE subset. 3 and transmit on the physical eCCE subset 4. Therefore, the method provided in this embodiment reduces the number of candidate locations corresponding to the UE1 candidate ePDCCH and the candidate locations corresponding to the UE2 candidate ePDCCH, and reduces the probability of collision of candidate locations corresponding to candidate ePDCCHs between different user equipments. .

 In the technical solution provided by this embodiment, for different user equipments having a downlink control channel with an aggregation level of L, the physical resource subsets 1 used by the user equipment to transmit the downlink control channel are the same or aligned. Therefore, the base station reduces the resource location of the candidate downlink control channel of the user equipment and the candidate of other user equipment after the candidate downlink control channel of the user equipment is corresponding to the physical resource subset according to the physical resource set 2 allocated to the user equipment. The number of the conflicts of the downlink control channel is reduced, and the probability that the base station occupies the candidate resource location of the downlink control channel of the other user equipment to transmit the downlink control channel of the user equipment is increased, and the user equipment can be used when transmitting the downlink control channel. Candidate resource location. Therefore, the embodiment of the invention reduces the probability of collision of candidate resource locations of downlink control channels between different user equipments, and improves transmission efficiency.

 2A is a flowchart of another method for transmitting control information according to an embodiment of the present invention. As shown

As shown in 2A, step 11 includes:

 Step 111: The base station determines a candidate physical resource subset in the N physical resource subsets included in the physical resource set 1, and the physical resource set 2 includes the physical resources of the candidate physical resource subset.

Before step 111, the base station divides the physical resource set 1 into N physical resource subsets according to an aggregation level L of the ePDCCHs of all user equipments in the user equipment set. Each physical resource subset contains physical resources capable of accommodating one candidate downlink control channel with an aggregation level of L.

 As shown in FIG. 2B, the physical resource set 1 includes physical resource pairs, and one resource block pair includes four physical eCCEs. The divided subset of physical resources is a subset of physical eCCE. The aggregation level of the ePDCCH search space of the user equipment is 8, that is, one candidate ePDCCH includes 8 logical eCCEs. The physical resource set 1 is divided into five physical eCCE subsets, and each physical eCCE subset includes eight physical eCCEs.

 As shown in FIG. 2B, in the physical resource set 1, the physical resources allocated by the base station to the user equipment are resource block pairs 2, 3, 5, 6, 8, 9, 10, and the set of these resource block pairs is a physical resource set. 2. The number of candidate ePDCCHs with an aggregation level of 8 for the user equipment is 2. Physical Resource Set 1 The divided 5 physical eCCE subsets, the physical resources are included in the physical resource set 2 The candidate physical eCCE subsets are the physical eCCE subset 3 and the physical eCCE subset 5.

 Step 112: The base station determines whether the number P of candidate physical resource subsets is equal to the number M of candidate ePDCCHs corresponding to the aggregation level of the user equipment. If it is equal, go to step 113; if it is less, go to step 114; if it is greater, go to step 115.

 Step 113: If the number of candidate physical resource subsets P is equal to the number M of candidate ePDCCHs with the aggregation level of L corresponding to the user equipment, the base station corresponding to the M candidate ePDCCHs corresponding to the aggregation level of the user equipment respectively P candidate subsets of physical resources.

 As shown in FIG. 2B, the candidate physical eCCE subset is the physical eCCE subset 3 and the physical eCCE subset 5, and therefore, the number of candidate physical eCCE subsets is equal to the number of candidate ePDCCHs of the user equipment whose aggregation level is 8. The two candidate ePDCCHs of the user equipment are respectively corresponding to the physical eCCE subset 3 and the physical eCCE subset 5.

 Step 1 14: If the number of candidate physical resource subsets P is smaller than the number M of candidate ePDCCHs corresponding to the aggregation level of the user equipment, the base station selects P candidate ePDCCHs from the M candidate ePDCCHs of the user equipment corresponding to the aggregation level L. - a subset of physical resources corresponding to P candidates

As shown in FIG. 2C, in the physical resource set 1, the physical resources allocated by the base station to the user equipment are the resource block pairs 2, 3, 4, and 5, and the resource block pairs constitute the physical resource set 2. The number of candidate ePDCCHs with an aggregation level of 8 for the user equipment is 2. The physical resource collection 1 is divided into 5 physical eCCE subsets, and the physical resources are included in the physical resource collection 2 The eCCE subset is a physical eCCE subset 2. If the number of candidate physical eCCE subsets is smaller than the number of candidate ePDCCHs, one of the two candidate ePDCCHs of the user equipment is mapped into the physical eCCE subset 2.

 Step 115: If the number of candidate physical resource subsets P is greater than the number M of candidate ePDCCHs corresponding to the aggregation level of the user equipment, the base station selects M candidate physical resource subsets from the P candidate physical resource subsets, and the user The device corresponds to M candidate ePDCCHs with an aggregation level of L, respectively, corresponding to a subset of physical resources selected by M^'.

 As shown in FIG. 2D, in the physical resource set 1, the physical resources allocated by the base station to the user equipment are 2, 3, 4, 5, 6, 8, 9, and 10, and the resource block pairs constitute physical resources. Set 2. The number of candidate ePDCCHs with an aggregation level of 8 for the user equipment is 2. Physical resource set 1 divided into 5 physical eCCE subsets, physical resources are collected by physical resources 2 The candidate physical eCCE subsets are physical eCCE subsets 2, physical eCCE subsets 3 and physical eCCE subsets 5. The number of candidate physical eCCE subsets is greater than the number of candidate ePDCCHs. After selecting two physical eCCE subsets from the three physical eCCE subsets, the two candidate ePDCCHs of the user equipment are mapped to the selected three physical eCCE subsets. 2 of them.

 A method of selecting M candidate physical resource subsets from P candidate candidate physical resource subsets, different user equipment selection results are different, different aggregation levels are selected differently, and different cell selection results are different.

 For example, the selected M physical resource subsets are in the P physical resource subset

 P

The number is index _m = m + A,m = 0,l,2,..., -l , or

 M

 P

Index _m = m + A, = 0,1,2, ..., M-1 , where Δ is the base station notification to the user equipment,

 M

It can also be invisibly notified by other parameters, for example, derived from parameters such as cell ID (cell ID) or user identification. User equipment-specific and/or aggregation-specific and/or cell-specific parameters,

 FIG. 2E is a flowchart of still another method for sending control information according to an embodiment of the present invention. The method of selecting the candidate physical resource subset among the divided N physical resource sets in this embodiment is different from the corresponding embodiment of FIG. 2A. As shown in FIG. 2E, step 11 includes:

Step a: The base station determines the candidate in the N physical resource subsets included in the physical resource set 1 An aggregation level L is used to divide the physical resource set 1 into N physical resource subsets, and the physical resources included in each physical resource subset can accommodate one candidate downlink control channel with an aggregation level of L.

 As shown in FIG. 2F, in the physical resource set 1, the physical resources allocated by the base station to the user equipment are resource block pairs 2, 3, 5, 8, 9, 10, and these resource block pairs constitute a physical resource set 2. The number of candidate ePDCCHs with an aggregation level of 8 for the user equipment is 3. In the five physical eCCE subsets after the physical resource set 1 is divided, the candidate physical eCCE subsets whose starting positions are included in the physical resource set 2 are the physical eCCE subsets 2, 3, and 5, and then the user equipments are 3 The candidate ePDCCHs correspond to the physical eCCE sets 2, 3, and 5, respectively.

 Step b: The base station determines whether the number of candidate physical resource subsets P is equal to the number M of candidate ePDCCHs corresponding to the user equipment aggregation level L. If it is equal, go to step c; if it is less, perform step d; if it is greater, execute step e.

 Step C: If the number of candidate physical resource subsets P is equal to the number M of candidate ePDCCHs with the aggregation level of the user equipment, the base station associates the M candidate ePDCCHs with the aggregation level of the user equipment to the P candidates. A subset of physical resources.

 Step d: If the number of candidate physical resource subsets P is smaller than the number M of candidate ePDCCHs of the user equipment corresponding to the aggregation level L, the base station selects P candidate ePDCCHs from the M candidate ePDCCHs whose user equipments are corresponding to the aggregation level L. The physical resource sub-step e corresponding to the P candidates: if the number P of candidate physical resource subsets is greater than the number M of candidate ePDCCHs corresponding to the aggregation level of the user equipment, the base station selects from the P candidate physical resource subsets The M candidate e-source subsets respectively correspond to the M candidate ePDCCHs of the user equipment corresponding to the aggregation level L to the M 4 selected physical resource subsets.

 FIG. 3 is a flowchart of a method for receiving control information according to an embodiment of the present invention. In this embodiment, the user equipment uses the same corresponding method in the corresponding embodiment of FIG. 1A to map the candidate downlink control channel to the physical resource location. As shown in FIG. 3, the method provided in this embodiment includes:

Step 31: Any one of the user equipment sets, according to the physical resource set 2 of the user equipment, and the plurality of physical resource subsets included in the physical resource set 1, determining one or more of the user equipment corresponding to the aggregation level L. a subset of physical resources corresponding to the candidate downlink control channels; each physical resource subset includes physical resources capable of accommodating one of the aggregation levels L The candidate downlink control channel, the physical resource set 2 is a subset of the physical resource set 1.

 Physical resource set 1 Each physical resource subset included contains a physical resource capable of accommodating a candidate downlink control channel with an aggregation level of L.

 Step 32: On the subset of all physical resources corresponding to the user equipment, the user equipment searches for control information carried by the downlink control channel sent by the base station to the user equipment.

 The specific steps of the step 31 are described in the corresponding embodiments of FIG. 1A, FIG. 2A and FIG. 2E, and details are not described herein again.

 FIG. 4 is a schematic diagram of a structure of a control information sending apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus provided in this embodiment includes: a determining module 41 and a sending module 42.

 The determining module 41 is configured to determine, according to the physical resource set 2 allocated to the user equipment, the physical resource set 2 of the user equipment set, and determine, in the plurality of physical resource subsets included in the physical resource set 1, the corresponding aggregation level of the user equipment is L. One or more candidate physical resource subsets corresponding to the downlink control channel, and sending the determined physical resource subset to the sending module; the physical resource included in each physical resource subset included in the physical resource set 1 can accommodate the aggregation level as L One candidate downlink control channel, the physical resource set 2 is a subset of the physical resource set 1.

 The physical resource set 1 is a set of all physical resources included in the system bandwidth, or the physical resource set 1 is a physical resource other than the physical resource that the system specifies cannot transmit the downlink control channel. The set of components, or the set of physical resources 1 is a collection of physical resources that are known to the base station and the user equipment.

 The physical resources included in the physical resource subset are continuous or discrete in the frequency domain. The physical resource subset has the same physical resource size as a candidate downlink control channel with an aggregation level of L.

 The sending module 42 is configured to send the control information carried by the downlink control channel with the aggregation level L to the user equipment on the physical resource subset corresponding to the candidate downlink control channel sent by the determining module 41.

 The specific functions of the determining module 41 are as follows:

 The determining module 41 is further configured to determine a candidate physical resource subset in the multiple physical resource subsets, the physical resource set 2 includes the physical resources of the candidate physical resource subset, or the physical resource set 2 includes the candidate physical resource subset Starting position

The determining module 41 is further configured to: if the number of candidate physical resource subsets P is equal to the user equipment pair The number M of candidate downlink control channels of the aggregation level L, and the M candidate downlink control channels of the user equipment corresponding to the aggregation level L, corresponding to the P candidate physical resource subsets; the determining module 41 is further used for If the number of candidate physical resource subsets P is smaller than the number M of candidate downlink control channels with the aggregation level of the user equipment, the P candidate is selected from the M candidate downlink control channels with the aggregation level L of the user equipment. Downlink control channel - a subset of physical resources corresponding to P candidates;

The determining module 41 is further configured to: if the number P of candidate physical resource subsets is greater than the number M of candidate downlink control channels corresponding to the aggregation level of the user equipment, select M candidate candidates from the P candidate physical resource subsets A subset of physical resources, the user equipment corresponding to the M candidate downlink control channels with an aggregation level of L - corresponding to the M candidate subsets of physical resources. The mapping module is selected from the M candidate subsets of the P candidate physical resource subsets, and the sequence number of the P candidate physical resource subsets is index _m = m * + A, = 0, 1, 2 ,...,Μ-l , or for

M index _m = m + A, = 0, l, 2, ..., M-1, where △ is based on the cell identity or user-specific parameters,

For example, the user identification is determined.

 The foregoing embodiment can be described in the corresponding embodiments of FIG. 1A, FIG. 2A and FIG. 2B, and details are not described herein again. The function of the determining module in this embodiment may be implemented by a processor, and the function of the transmitting module may be implemented by a transmitter.

 FIG. 5 is a schematic diagram of a structure of a control information receiving apparatus according to an embodiment of the present invention. As shown in FIG. 5, the control information receiving apparatus provided in this embodiment includes: a determining module 51 and a searching module 52.

 The determining module 5 1 is configured to determine, according to the physical resource set 2 of the control information receiving device that the base station is the one, the one or more of the plurality of physical resource subsets included in the physical resource set 1 A subset of physical resources corresponding to the candidate downlink control channel, and sending the determined subset of physical resources to the search module 51; the physical resource included in each physical resource subset included in the physical resource set 1 can accommodate one of the aggregation levels L The candidate downlink control channel, the physical resource set 2 is a subset of the physical resource set 1.

 The physical resource set 1 is a set of all physical resources included in the system bandwidth, or the physical resource set 1 is a physical resource other than the physical resource that the system specifies cannot transmit the downlink control channel. The set of components, or the set of physical resources 1 is a set of physical resources well known to the base station and the control information receiving device.

The physical resources included in the physical resource subset are continuous or discrete in the frequency domain. The physical resource subset has the same physical resource size as a candidate downlink control channel with an aggregation level of L.

 The searching module 52 is configured to search, on a subset of all physical resources sent by the determining module, control information carried by the downlink control channel sent by the base station to the control information receiving apparatus.

 Further, the specific functions of the determining module 5 1 are as follows:

 The determining module 5 1 is further configured to determine a candidate physical resource subset in the multiple physical resource subsets, the physical resource set 2 includes the candidate physical resource subset physical resource, or the physical resource set 2 includes the candidate physical resource sub- The starting position of the set.

 The determining module 5 1 is further configured to: if the number P of the candidate physical resource subsets is equal to the control signal, the receiving device corresponds to the number M of candidate downlink control channels with the aggregation level L, and the control information receiving device corresponding to the aggregation level is L M candidate downlink control channels - corresponding to a subset of P candidate physical resources.

 The determining module 5 1 is further configured to: if the number P of candidate physical resource subsets is smaller than the number M of candidate downlink control channels corresponding to the aggregation level of the control information receiving device, the corresponding aggregation level of the control information receiving device is L Among the M candidate downlink control channels, P candidate downlink control channels are selected, corresponding to P candidate candidate physical resource subsets.

 The determining module 5 1 is further configured to: if the number P of candidate physical resource subsets is greater than the number M of candidate downlink control channels corresponding to the aggregation level of the control information receiving apparatus, select M from the P candidate physical resource subsets The candidate physical resource subsets, the control information receiving device corresponding to the M candidate downlink control channels with the aggregation level L, corresponding to the M candidate physical resource subsets. The determining, by the module, the subset of the physical resources of the M candidate selected from the P candidate physical resource subsets, and the sequence number of the P candidate physical resource subsets is

 P P

Index _m = m + A, = 0,1,2,... ,M-1 , or index _m = m ^: + A, = 0,1,2,...,M-1

 M M

Wherein, Δ is determined according to a cell identifier or a user-specific parameter, such as a user identifier.

 The foregoing embodiment can be described in the corresponding embodiments in FIG. 3, FIG. 1A, FIG. 2A and FIG. 2B, and details are not described herein again. The function of the determining module in this embodiment may be implemented by a processor, and the function of the searching module may be implemented by the receiver.

 FIG. 6 is a flowchart of still another method for transmitting control information according to an embodiment of the present invention. As shown

As shown in FIG. 6A, the method provided in this embodiment includes:

Step 61: The base station determines, in the N physical resource subsets included in the physical resource set A, N candidate downlink control channels corresponding to the aggregation level of the user equipment, corresponding physical resources. The subset, the physical resource set A is a set of physical resource components allocated by the base station for the user equipment. A set of physical resources allocated by a base station for a user equipment is referred to as a physical resource set A. The physical resources allocated by the base station to the user equipment may be a resource block pair, an enhanced control channel unit, or an enhanced resource unit group.

 For an aggregation level L of the user equipment, the base station according to the number N of candidate downlink control channels of the aggregation level L of the user equipment corresponding to the aggregation level L, and the physical resources of the user equipment of the candidate downlink control channel with the aggregation level L The set is divided into N subsets of physical resources. The number of physical resource subsets after the division is equal to the number of candidate downlink control channels whose user equipment corresponds to the aggregation level L. Specifically, the sequence number of the physical resource at the beginning of each physical resource subset

 R

Is inde\ = n + Δ, w = 0,1,2, ...,N-1 , where R is the physical resource included in the physical resource set

 N

The total number of n, the number of each physical resource subset. Wherein Δ is determined according to a cell identity or a user-specific parameter, such as a user identity.

 The N candidate candidate downlink control channels corresponding to the aggregation level of the user equipment are corresponding to the N physical resource subsets, that is, one candidate downlink control channel corresponds to one physical resource subset. Each candidate downlink control channel specifically corresponds to which physical resource location of the physical resource subset, and the base station and the user equipment can agree on the corresponding method, so that the final corresponding result of the base station and the user equipment is consistent.

 Step 62: The base station sends control information carried by the downlink control channel to the user equipment on a subset of the physical resources.

 As shown in FIG. 6B, the number of candidate ePDCCHs of the aggregation level 8 of the user equipment is three, and the base station divides the physical resource set A composed of the physical resources allocated by the user equipment into three physical eCCE subsets. The three candidate ePDCCHs of the aggregation level 8 of the user equipment respectively correspond to different physical eCCE subsets.

 Further, step 62 specifically includes the following steps:

 The base station corresponds to the N candidate downlink control channels with the aggregation level L of the user equipment according to the number of the candidate downlink control channel of the user equipment, and sequentially corresponds to the N physical resource subsets.

 If a physical resource subset XI cannot accommodate a candidate downlink control channel Y with an aggregation level of L, the base station may correspond to the logical resource resources of the candidate downlink control channel Y corresponding to the physical resource subset XI to the physical resource subset XI. The next physical resource subset on the physical resource on X2.

As shown in FIG. 6B, each of the divided physical eCCE subsets can accommodate one candidate downlink control channel of aggregation level 8. 3 candidate downlink control channels of aggregation level 8 - corresponding order Corresponding to the divided physical eCCE subset 1 , specifically, the candidate ePDCCH 1 is corresponding to the physical eCCE subset 1 , the candidate ePDCCH 2 is corresponding to the physical eCCE subset 2 , and the candidate ePDCCH 3 is corresponding to the physical eCCE subset 3 .

 As shown in FIG. 6C, the number of candidate ePDCCHs of the aggregation level 16 of the user equipment is 4, and the base station divides the physical resource set A composed of physical resources allocated by the user equipment into 4 physical eCCE subsets. Each of the divided physical eCCE subsets cannot accommodate one candidate downlink control channel of aggregation level 16. The base station associates each candidate ePDCCH to - corresponding to the physical eCCE subset according to the number of candidate ePDCCHs of the user equipment. The candidate ePDCCH 11 is mapped to the physical eCCE subset 1 , and the 4th logical eCCE of the candidate ePDCCH 1 cannot be mapped to the physical eCCE subset 1 and corresponds to the next physical eCCE subset of the physical eCCE subset 1 Physical eCCE subset 2 on the first physical eCCE. Similarly, the fourth logical eCCE of the candidate ePDCCH 12 cannot be mapped to the physical eCCE subset 2, and is mapped to the first physical eCCE subset of the physical eCCE subset 2, that is, the first physical eCCE of the physical eCCE subset 3. .

 Further, if the physical resource subset XI is the last physical resource subset in the N physical resource subsets, the base station cannot correspond to the logical physical resource of the candidate downlink control channel Y on the physical resource subset XI corresponding to the first physical resource. On the physical resources on the subset.

 As shown in FIG. 6C, the 2nd, 3rd, and 4th logical eCCEs of the candidate ePDCCH 14 cannot be mapped to the physical eCCE subset 4, and since the physical eCCE subset 4 is the last physical eCCE subset, the candidate ePDCCH 14 is the second. The 3 and 4 logical eCCEs correspond to the first physical eCCE subset, ie, the first, second, and third physical eCCEs on the physical eCCE subset 1.

 With the above technical solution, each candidate downlink control channel of the user equipment is dispersed to correspond to different physical resource subsets, instead of being collectively mapped to the same physical resource, so that the downlink control channel of the user equipment has more candidate resources. The location gives the user device more opportunities to get a faster transfer rate.

 FIG. 7 is a flowchart of another method for receiving control information according to an embodiment of the present invention. In this embodiment, the user equipment maps the physical resource locations of the candidate downlink control channels in the same manner as the base station. As shown in FIG. 7, the method provided in this embodiment includes:

Step 71: In the N physical resource subsets included in the physical resource set A, the user equipment determines that the user equipment corresponds to the N candidate downlink control channels with the aggregation level L—the corresponding physical A subset of resources; a set of physical resources A is a set of physical resources allocated by a base station for user equipment.

 Physical resource collection A contains the physical resources of the starting position of each physical resource subset

 R

The sequence number is inde = n + Α, η = 0, ί, 2,..., Ν-ί , where R is the physics included in the physical resource set

 N

The total number of resources, n is the number of each physical resource subset. Wherein eight is determined according to a cell identifier or a user-specific parameter, such as a user identifier. Each candidate downlink control channel of the aggregation level of the user equipment corresponds to a different subset of physical resources.

 Step 72: The user equipment searches for control information carried by the downlink control channel sent by the base station to the user equipment on the N physical resource subsets.

 Step 72 may specifically include the following:

 According to the number of the candidate downlink control channel with the aggregation level of the user equipment, the N candidate downlink control channels of the user equipment corresponding to the aggregation level are sequentially assigned to the N physical resource subsets.

 If a physical resource subset XI cannot accommodate a candidate downlink control channel Y with an aggregation level of L, the logical physical resources that cannot correspond to the candidate downlink control channel Y on the physical resource subset XI are sequentially mapped to the physical resource subset XI. On the physical resource on the next subset of physical resources X2.

 If the physical resource subset XI is the last physical resource subset in the N physical resource subsets, the logical physical resources of the candidate downlink control channel Y that cannot correspond to the physical resource subset X 1 correspond to the first physical resource subset. On the physical resources.

 FIG. 8 is a schematic structural diagram of another control information sending apparatus according to an embodiment of the present invention. The apparatus provided in this embodiment includes: a determining module 81 and a sending module 82.

 The determining module 81 is configured to determine, in the N physical resource subsets included in the physical resource set A, the N candidate downlink control channels corresponding to the aggregation level of the user equipment, the corresponding physical resource subset, and aggregate the user equipments. N candidate downlink control channels of level L - corresponding physical resource subsets are sent to the sending module; physical resource set A is a set of physical resource components allocated for the user equipment. Specifically, the physical resources of the starting position of each physical resource subset

 R

The source number is inde = n + Δ, w = 0,1,2, ...,N-1 , where R is the physical resource set included

 N

The total number of physical resources, where n is the number of each physical resource subset. Where Δ is determined according to the cell identification or user-specific parameters, such as the user identification.

The physical resources allocated for the user equipment are resource block pairs, enhanced control channel units, or enhanced resource unit groups. The sending module 82 is configured to send control information carried by the downlink control channel to the user equipment on a physical resource subset sent by the determining module.

 The specific functions of the determination module 81 are as follows:

 The determining module 81 is further configured to sequentially correspond to the N candidate downlink control channels of the user equipment to the N physical resource subsets according to the number of the candidate downlink control channel whose user equipment corresponds to the aggregation level L;

 The determining module 81 is further configured to: if a physical resource subset XI cannot accommodate a candidate downlink control channel Y with an aggregation level L, the logical physical resources that cannot correspond to the candidate downlink control channel Y on the physical resource subset XI are sequentially corresponding. Go to the physical resource on the next physical resource subset X2 of the physical resource subset XI.

 Further, the determining module 81 is further configured to: if the physical resource subset XI is the last physical resource subset in the N physical resource subsets, the logical physical resource corresponding to the candidate downlink control channel Y on the physical resource subset XI cannot be corresponding. Go to the physical resource on the first subset of physical resources.

 This embodiment can be described in the corresponding embodiment of FIG. 6A, and details are not described herein again. The function of the determining module in this embodiment may be implemented by a processor, and the function of the transmitting module may be implemented by a transmitter.

 FIG. 9 is a schematic structural diagram of another control information receiving apparatus according to an embodiment of the present invention. The apparatus provided in this embodiment includes: a determining module 91 and a searching module 92.

 a determining module 91, configured to determine, in the N physical resource subsets included in the physical resource set A, a subset of physical resources corresponding to the N candidate downlink control channels of the aggregation level L corresponding to the control information receiving apparatus, and Transmitting, by the control information receiving device, N candidate downlink control channels with an aggregation level of L, corresponding physical resource subsets, to the search module; the physical resource set A is allocated by the base station to the control information receiving device A collection of physical resources.

 Specifically, the sequence number of the physical resource at the beginning of each physical resource subset is

R

Inde\ + Δ, w = 0,1,2, ...,N-1 , where R is the physical resource included in the physical resource set

 N

The total number, n is the number of each physical resource subset. Wherein eight is determined according to a cell identifier or a user-specific parameter, such as a user identifier.

The physical resources allocated for the control information receiving apparatus are resource block pairs, enhanced control channel units, or enhanced resource unit groups. The searching module 92 is configured to search, on the N pieces of the physical resources sent by the determining module, control information carried by the downlink control channel sent by the base station to the control information receiving apparatus.

 The determination module 91 also has the following functions:

 The determining module 91 is further configured to: according to the control information, the corresponding aggregation level of the receiving device is

The number of the candidate downlink control channels of the L, the control information receiving apparatus corresponding to the N candidate downlink control channels of the aggregation level L, sequentially corresponding to the N physical resource subsets.

 The determining module 91 is further configured to: if one of the physical resource subsets XI cannot accommodate one candidate downlink control channel Y with an aggregation level of L, the candidate downlink control that cannot be corresponding to the physical resource subset XI The logical physical resources of channel Y are in turn corresponding to the physical resources on the next physical resource subset X2 of the physical resource subset XI.

 Further, the determining module 91 is further configured to: if the physical resource subset XI is the last physical resource subset of the N physical resource subsets, the candidate downlink may not be corresponding to the physical resource subset XI The logical physical resources of control channel Y correspond to physical resources on the first subset of physical resources.

 This embodiment can be described in the corresponding embodiment of FIG. 6A and FIG. 7, and details are not described herein again. The function of the determining module in this embodiment may be implemented by a processor, and the function of the searching module may be implemented by a receiver.

 FIG. 10A is a flowchart of still another method for sending control information according to an embodiment of the present invention. As shown in FIG. 10A, this embodiment includes:

 Step 101: For any user equipment in the user equipment set, the base station determines, according to the physical resource set 2 allocated to the user equipment, a physical resource subset corresponding to one or more candidate downlink control channels with an aggregation level L corresponding to the user equipment; The number of physical resource units corresponding to the candidate downlink control channel is R; the starting physical resource unit of the physical resource subset is the Q+X physical resource unit in the physical resource set 1, and the physical resource set 1 includes Y physical resource units. The physical resource subset includes R physical resource units; Q can be divisible by R, X is an integer, X is greater than or equal to 1, and is less than or equal to Y; physical resource set 2 is a subset of physical resource set 1.

In the embodiment of the present invention, the downlink control channel may be a PDCCH or an ePDCCH. The downlink control channel of all user equipments in the user equipment set has an aggregation level of L, that is, all user equipments in the user equipment set have an aggregation level of L. Line control channel. The user equipment in the foregoing user equipment set transmits a downlink control channel on some physical resources or all physical resources in the physical resource set 1. The user equipment set may be a set of all user equipments in the cell, or may be a set of all user equipments in the cell that receive the downlink control channel capability; or may be a set of user equipments selected according to the base station; or may be in the same A set of user equipments that receive downlink control channels on a carrier.

 The physical resource set 1 may be a set of all physical resources included in the system bandwidth, or may be a set of physical resources included in the system bandwidth, except for physical resources other than physical resources that the system cannot transmit the downlink control channel. It may also be a collection of physical resources that are known to the base station and the user equipment. Some of the resources that cannot transmit the downlink control channel may be PBCH domains, or private bandwidths of some special transmission types, such as the bandwidth reserved by MTC. The physical resources contained in the physical resource collection can be PRB pair, eCCE or REG.

 The physical resource set 2 is a set of physical resources allocated by the base station for the user equipment. A user equipment may have one or more candidate ePDCCHs at one aggregation level. The number of physical resource units corresponding to the candidate downlink control channel is R. For any user equipment in the user equipment set, the base station associates the candidate downlink control channel of the aggregation level L with the physical resource that meets the following conditions according to the physical resource set 2 Subset 3: The starting physical resource unit of the physical resource subset 3 is the Q+X physical resource unit in the physical resource set 1, and the physical resource subset 3 includes R physical resource units; the Q can be R Divisible. The physical resources contained in the subset of physical resources may be physically continuous or discrete. The physical resource unit may be a PRB pair, an eCCE or an eREG.

 Specifically, step 101 includes the following:

 The base station determines, in the physical resource set 2, a P-subject candidate physical resource subset, where the starting physical resource of the candidate physical resource subset is the Q+X physical resource unit in the physical resource set 1; Said Q can be divisible by R.

If the number of candidate physical resource subsets P is equal to the number M of candidate downlink control channels of the aggregation level L of the user equipment, the base station associates the user equipment with M candidate downlink control channels with an aggregation level of L—corresponding to P A subset of candidate physical resources. If the number of candidate physical resource subsets P is smaller than the number M of candidate downlink control channels with the aggregation level of the user equipment, the base station selects P candidates from the M candidate downlink control channels with the aggregation level L of the user equipment. Downlink Control Channel - A subset of physical resources corresponding to P candidates. If the number of candidate physical resource subsets P is greater than the number M of candidate downlink control channels with the aggregation level of the user equipment, the base station selects M candidate subsets of physical resources from the P candidate physical resource subsets, The user equipment corresponds to M candidate downlink control channels with an aggregation level of L—corresponding to M candidate subsets of physical resources. Further, the base station describes the physical resources from the P candidate The method for selecting the M subsets of the candidate physical resources in the source subset may be as follows: where the M candidate subsets of the physical resources selected from the P candidate candidate physical resource subsets are in the P candidate physical resource subsets The serial number is index _m = m + A, m = 0,1,2,..., -1 , or

 M

 P_

Index _m = m + A,m = 0,l,2,..., -l , where △ is based on cell identity or user-specific parameters,

 M

For example, the user identification is determined.

 As shown in FIG. 10B, the aggregation level 8 of the user equipment has two candidate ePDCCHs, and each candidate ePDCCH corresponds to eight eCCEs. The physical resource unit in this embodiment is an eCCE, and the physical resource corresponding to each candidate ePDCCH with an aggregation level of 8 is 8 physical resource units, that is, R=8. The physical resource set 1 for the user equipment to transmit the ePDCCH includes 200 eCCEs, numbered eCCE 0 to 199. The set of physical resources allocated by the base station to the user equipment 2 includes 18 eCCEs, eCCE 0 to 7 and eCCE 78 to 87, and eCCE 0 is 0, which is the first eCCE in the physical resource set. The number that can be divisible by 8 is 0 and 80. Therefore, the 0+1th eCCE is the starting eCCE of the first physical resource set 3, and the physical resource set 3 is composed of eCCEs numbered 0-7; 80+1 eCCEs are the starting eCCEs of the second physical resource subset 3. The physical resource set 3 is composed of eCCEs numbered 80 to 87. .

 In addition, if the physical resource unit is an eREG and each eCCE includes 4eREG, the physical resource corresponding to each candidate ePDCCH with an aggregation level of 8 is 8 x 4=32 physical resource units, that is, R=32. If the physical resource unit is a PRB pair and each PRB pair includes four eCCEs, the physical resource corresponding to each candidate ePDCCH with an aggregation level of 8 is 8/4=2 physical resource units, that is, R=2.

 As shown in FIG. 10B, the candidate resource locations to which the first candidate ePDCCH of the aggregation level 8 of the user equipment is mapped are the first physical resource subset 3 composed of eCCEs numbered 0 to 7, and the aggregation level 8 of the user equipment. The candidate resource locations to which the second candidate ePDCCH is mapped are composed of eCCEs numbered 80-87 to form a second physical resource subset 3.

 Step 102: On the determined one of the physical resource subsets, the base station sends control information carried by the downlink control channel with the aggregation level L to the user equipment.

 The user equipment corresponding to the aggregation level L may have multiple candidate downlink control channels mapped to the physical resource subset, and the base station sends the aggregation level L to the user equipment on a physical resource subset to which the candidate downlink control channel is mapped. Control information carried by the downlink control channel.

 On the user equipment side, the same method is used to determine the physical resource subset corresponding to the candidate downlink control channel of the aggregation level L, and the user equipment searches for the downlink control sent by the base station to the user equipment on all the physical resource subsets corresponding to the candidate downlink control channel. Control information carried by the channel.

In this embodiment, all the user equipments in the user equipment set 1 are used for corresponding aggregation. The physical resource subset of the candidate downlink control channel of the level L is aligned. After the base station matches the candidate downlink control channel to the physical resource subset, the base station occupies the candidate resource location of the downlink control channel of one user equipment and transmits another user equipment. The probability of the downlink control channel is reduced, so that the candidate resource location that can be used when another user equipment transmits the downlink control channel increases. Therefore, this embodiment reduces the probability of collision of candidate resource locations of downlink control channels between different user equipments, and improves transmission efficiency.

 FIG. 11 is a schematic structural diagram of still another control information sending apparatus according to an embodiment of the present invention. As shown in FIG. 11, the embodiment includes: a determining module 11 1 and a sending module 112.

 The determining module 1 11 is configured to determine, for any user equipment in the user equipment set, one or more candidate downlink control channels with an aggregation level L corresponding to the user equipment according to the physical resource set 2 allocated to the user equipment. Corresponding physical resource subsets, and sending the determined physical resource subset to the sending module; the number of physical resource units corresponding to the candidate downlink control channel is R; the starting physical resource unit of the physical resource subset is the a Q+X physical resource unit in the physical resource set 1, the physical resource set 1 includes Y physical resource units, the physical resource subset includes R physical resource units; the Q can be divisible by R, and X is a An integer, X is greater than or equal to 1, less than or equal to Y; and the physical resource set 2 is a subset of the physical resource set 1.

 The physical resource set 1 is a set of all physical resource components included in the system bandwidth, or the physical resource set 1 is a physical resource included in the system bandwidth, and the physical system that cannot specify the downlink control channel cannot be sent. A set of physical resources other than the resource, or the physical resource set 1 is a physical resource set known to the base station and the user equipment. The physical resources included in the physical resource subset are continuous or discrete in the frequency domain. The physical resource allocated by the base station to the user equipment is a resource block pair, an enhanced control channel unit, or an enhanced resource unit group.

 The sending module 1 12 is configured to send control information of the downlink control channel bearer of the aggregation level L to the user equipment on the physical resource subset corresponding to the candidate downlink control channel sent by the determining module.

 The determination module 11 1 also has the following functions:

The determining module is further configured to determine, in the physical resource set 2, a P-th candidate physical resource subset, where the starting physical resource unit of the candidate physical resource subset is the Qth in the physical resource set +X physical resource units; the Q can be divisible by R; The determining module is further configured to: if the number P of the candidate physical resource subsets is equal to the number M of candidate downlink control channels with the aggregation level L corresponding to the user equipment, the aggregation level corresponding to the user equipment is M candidate downlink control channels of L - corresponding to P subsets of said candidate physical resources;

 The determining module is further configured to: if the number P of the candidate physical resource subsets is smaller than the number M of candidate downlink control channels of the aggregation level L of the user equipment, the aggregation corresponding to the user equipment Selecting P candidate downlink control channels from among M candidate downlink control channels of level L - corresponding to P candidate physical resource subsets;

 The determining module is further configured to: if the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels whose aggregation level is L corresponding to the user equipment, from the physicals of the P candidate The M subset of the resources selects the M candidate subsets of the physical resources, and the M candidate downlink control channels with the aggregation level of L corresponding to the user equipment are corresponding to the M subsets of the candidate physical resources.

 The foregoing embodiment can be described in the corresponding embodiment of FIG. 10A, and details are not described herein again.

 The functions of the determining module 111 in the above embodiment may be implemented by a processor, and the functions of the transmitting module 112 may be implemented by a transmitter.

 The embodiment of the invention further provides another method for receiving control information, including:

 The user equipment determines, according to the physical resource set 2 allocated by the base station to the user equipment, a physical resource subset corresponding to one or more candidate downlink control channels with an aggregation level of L corresponding to the user equipment, where the candidate downlink control channel corresponds to The number of physical resource units is R; the starting physical resource unit of the physical resource subset is the Q+X physical resource unit in the physical resource set 1, and the physical resource set 1 includes Y physical resource units The physical resource subset includes R physical resource units; the Q can be divisible by R, X is an integer, X is greater than or equal to 1, and is less than or equal to Y; and the physical resource set 2 is a child of the physical resource set 1 The user equipment searches for the control information carried by the base station to the user equipment for the downlink control channel with the aggregation level L, on the determined subset of the physical resources.

The physical resource set 1 is a set of all physical resource components included in the system bandwidth, or the physical resource set 1 is a physical resource included in the system bandwidth, and the physical system that cannot specify the downlink control channel cannot be sent. a set of physical resources other than the resource, or the physical resource set 1 is known to the base station and the control information receiving apparatus Collection of physical resources. The physical resources included in the physical resource subset are continuous or discrete in the frequency domain. The physical resource allocated by the base station to the control information receiving apparatus is a resource block pair, an enhanced control channel unit, or an enhanced resource unit group.

 For details, refer to the description in the corresponding embodiment in FIG. 10A, and details are not described herein again.

 The embodiment of the present invention further provides another control information receiving apparatus, including:

 a determining module, configured to determine, according to a physical resource set 2 allocated by the base station to the control information receiving apparatus, a physical resource subset corresponding to one or more candidate downlink control channels with an aggregation level L corresponding to the control information receiving apparatus, And sending the determined subset of physical resources to the search module; the number of physical resource units corresponding to the candidate downlink control channel is R; and the starting physical resource unit of the physical resource subset is the Q in the physical resource set 1 +X physical resource units, the physical resource set 1 includes Y physical resource units, the physical resource subset includes R physical resource units; the Q can be divisible by R, X is an integer, and X is greater than or equal to 1, Less than or equal to Y; the physical resource set 2 is a subset of the physical resource set 1;

 The physical resource set 1 is a set of all physical resource components included in the system bandwidth, or the physical resource set 1 is a physical resource included in the system bandwidth, and the physical system that cannot specify the downlink control channel cannot be sent. A set of physical resources other than the resource, or the physical resource set 1 is a physical resource set known to the base station and the control information receiving apparatus. The physical resources included in the physical resource subset are continuous or discrete in the frequency domain. The physical resource allocated by the base station to the control information receiving apparatus is a resource block pair, an enhanced control channel unit, or an enhanced resource unit group.

 The search module is configured to search, on a subset of all physical resources sent by the determining module, the base station to send control information carried by the downlink control channel with an aggregation level L to the control information receiving apparatus.

 The determination module also has the following features:

 a determining module, configured to determine, in the physical resource set 2, a P physical resource subset of P candidates, where a starting physical resource unit of the candidate physical resource subset is a Q+X in the physical resource set 1 Physical resource units; the Q can be divisible by R.

The determining module is further configured to: if the number P of the candidate physical resource subsets is equal to the number M of candidate downlink control channels of the aggregation level L corresponding to the control information receiving apparatus, receive the control information The M candidate downlink control channels with the aggregation level L corresponding to the device correspond to the P subset of the candidate physical resources. The determining module is further configured to: if the number P of the candidate physical resource subsets is smaller than the number M of candidate downlink control channels with an aggregation level L corresponding to the control information receiving apparatus, receive the control information And selecting, by the M candidate downlink control channels with an aggregation level of L, the P downlink control channels of the candidate, the determining module corresponding to the P physical resources of the candidate, and the candidate The number of physical resource subsets P is greater than the number M of candidate downlink control channels whose aggregation level is L corresponding to the control information receiving apparatus,

Selecting, by the P subset of the candidate physical resource subsets, the M candidate subsets of the physical resources, and selecting the M candidate downlink control channels of the aggregation level L of the control information receiving apparatus to correspond to the M A subset of candidate physical resources.

Further, the method for selecting the M subsets of the candidate resource resources from the P candidate physical resource subsets may be as follows: where the determining module selects M candidates from the P candidate physical resource subsets The number of physical resource subsets in the P candidate candidate physical resource subset is index _m = m + A, m = 0,1,2,..., -1 , or

M index _m = m + A, m = 0,l,2,..., - l , where △ is based on the cell identity or user-specific parameters

The number, for example, the user ID is determined.

 The foregoing embodiment can be described in the corresponding embodiment of FIG. 10A, and details are not described herein again.

 The function of the determining module in the above embodiment may be implemented by a processor, and the function of the transmitting module may be implemented by a transmitter.

 A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

 It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

Claim A method for transmitting control information, characterized in that it comprises:  For any user equipment in the user equipment set, the base station determines, according to the physical resource set 2 allocated to the user equipment, a plurality of physical resource subsets included in the physical resource set 1, and determines that the aggregation level corresponding to the user equipment is L. a physical resource subset corresponding to one or more candidate downlink control channels of the downlink control channel; the physical resource included in each physical resource subset included in the physical resource set 1 can accommodate the candidate downlink of the aggregation level L a control channel, where the physical resource set 2 is a subset of the physical resource 1;  And determining, by the base station, the control information carried by the downlink control channel with the aggregation level L, to the user equipment, on the determined one of the physical resource subsets.  The method according to claim 1, wherein the base station determines the user equipment in a plurality of physical resource subsets included in the physical resource set 1 according to the physical resource set 2 allocated to the user equipment. A physical resource subset corresponding to one or more candidate downlink control channels with an aggregation level of L, including:  The base station determines a candidate physical resource subset in the plurality of the physical resource subsets, the physical resource set 2 includes the physical resource of the candidate physical resource subset, or the physical resource set 2 includes the The starting position of the candidate physical resource subset;  If the number P of the candidate physical resource subsets is equal to the number M of the candidate downlink control channels with the aggregation level L of the user equipment, the base station sets the aggregation level of the user equipment to L. Candidate downlink control channels - corresponding to P subsets of said candidate physical resources; or  If the number P of the candidate physical resource subsets is smaller than the number M of candidate downlink control channels with the aggregation level L corresponding to the user equipment, the base station has an aggregation level L corresponding to the user equipment. Selecting P candidate downlink control channels from among the candidate downlink control channels - corresponding to P candidate physical resource subsets; or If the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels with the aggregation level L corresponding to the user equipment, the base station selects M from the P candidate physical resource subsets. The candidate physical resource subsets, the M candidate downlink control channels with the aggregation level of L corresponding to the user equipment, corresponding to the M subsets of the candidate physical resources. The method according to claim 2, wherein the base station selects M candidate subsets of physical resources from the P candidate candidate physical resource subsets, at P locations  P The sequence number of the candidate physical resource subset is index _m = m * + A, m = 0, 1, 2, ..., -l , or,  Μ  P For index _m = m + A, = 0,1,2, ...,Μ-1 , where △ is based on the cell ID or user ID  Μ set.  The method according to any one of claims 1 to 3, wherein the physical resource set 1 is a set of all physical resources included in a system bandwidth, or the physical resource set 1 is a system bandwidth. The physical resources included in the system are configured to be a set of physical resources other than the physical resources of the downlink control channel, or the physical resource set 1 is a physical resource common to the base station and the user equipment. set.  The method according to any one of claims 1 to 4, wherein the physical resources included in the subset of physical resources are continuous or discrete in the frequency domain.  The method according to any one of claims 1 to 5, wherein the physical resource subset is the same as the physical resource occupied by one candidate downlink control channel of the aggregation level L.  A control information receiving method, comprising:  Determining, by the user equipment set, the aggregation level corresponding to the user equipment is L, according to the physical resource set 2 allocated by the base station to the user equipment, on the plurality of physical resource subsets included in the physical resource set 1 a physical resource subset corresponding to one or more candidate downlink control channels; the physical resource included in each physical resource subset included in the physical resource set 1 can accommodate one candidate downlink control channel with an aggregation level L, the physical Resource set 2 is a subset of the physical resource set 1;  The user equipment searches for control information carried by the downlink control channel sent by the base station to the user equipment on the determined subset of all the physical resources.  The method according to claim 7, wherein the base station is a physical resource set 2 of the user equipment, and the user equipment is determined on a plurality of physical resource subsets included in the physical resource set 1 A physical resource subset corresponding to one or more candidate downlink control channels with an aggregation level of L, including: Determining a candidate physical resource subset in the plurality of physical resource subsets, the physical resource set 2 includes a physical resource of the candidate physical resource subset, or the physical resource set 2 includes a starting position of the candidate physical resource subset;  If the number P of the candidate physical resource subsets is equal to the number M of the candidate downlink control channels with the aggregation level L corresponding to the user equipment, the user equipment sets the aggregation level corresponding to the user equipment to L. M candidate downlink control channels - corresponding to P subsets of said candidate physical resources; or  If the number of the candidate physical resource subsets is smaller than the number M of candidate downlink control channels of the user equipment, the aggregation level of the user equipment corresponding to the user equipment is L. Selecting P candidate downlink control channels from among the M candidate downlink control channels, corresponding to P candidate physical resource subsets; or  If the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels with the aggregation level L corresponding to the user equipment, the user equipment selects from the P subsets of the candidate physical resources. The M candidate subsets of the physical resources, the M candidate downlink control channels whose aggregation level is L corresponding to the user equipment, corresponding to the M subsets of the candidate physical resources.  The method according to claim 8, wherein the user equipment selects M of the candidate physical resource subsets from the P candidate physical resource subsets, in the P  P The sequence number of the candidate physical resource subset is index _m = m + A, m = 0, 1, 2, ..., -1 , or  M  P ^ , index _m = m * + A, = 0,1,2, ..., M-1 , where △ is based on the cell ID or user ID  M determine.  The method according to any one of claims 7 to 9, wherein the physical resource set 1 is a set of all physical resources included in a system bandwidth, or the physical resource set 1 is a system bandwidth. The physical resources included in the system are configured to be a set of physical resources other than the physical resources of the downlink control channel, or the physical resource set 1 is a physical resource common to the base station and the user equipment. set.  The method according to any one of claims 7 to 10, wherein the physical resources included in the physical resource subset are continuous or discrete in the frequency domain.  The method according to any one of claims 7 to 11, wherein the physical resource subset has the same physical resource size as a candidate downlink control channel with an aggregation level of L. 13. A control information transmitting apparatus, comprising: a determining module, configured to determine, according to the physical resource set 2 allocated to the user equipment, the aggregation corresponding to the user equipment, in the plurality of physical resource subsets included in the physical resource set 1 And a subset of the physical resources corresponding to the one or more candidate downlink control channels of the level L, and sending the determined subset of physical resources to the sending module; the physical resources included in each physical resource subset included in the physical resource set 1 Capable of accommodating one candidate downlink control channel with an aggregation level of L, the physical resource set 2 being a subset of the physical resource set 1;  The sending module is configured to send, to the user equipment, control information carried by a downlink control channel with an aggregation level L, on the one of the physical resource subsets sent by the determining module.  The control information transmitting apparatus according to claim 13, wherein the determining module is further configured to determine a candidate physical resource subset in the plurality of the physical resource subsets, where the physical resource set 2 includes a physical resource of the candidate physical resource subset, or the physical resource set 2 includes a starting location of the candidate physical resource subset; the determining module is further configured to: if the candidate physical resource sub The number of sets P is equal to the number M of candidate downlink control channels whose aggregation level is L corresponding to the user equipment, and the M candidate downlink control channels corresponding to the aggregation level of the user equipment are corresponding to P The candidate physical resource subset; or,  The determining module is further configured to: if the number P of the candidate physical resource subsets is smaller than the number M of candidate downlink control channels with the aggregation level L corresponding to the user equipment, the aggregation corresponding to the user equipment Selecting P candidate downlink control channels from among the M candidate downlink control channels of level L - corresponding to P candidate physical resource subsets; or  The determining module is further configured to: if the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels with the aggregation level L corresponding to the user equipment, from the physical of the P candidate The M subset of the resources selects the M candidate subsets of the physical resources, and the M candidate downlink control channels with the aggregation level of L corresponding to the user equipment are corresponding to the M subsets of the candidate physical resources. The control information transmitting apparatus according to claim 14, wherein the determining module selects, from the P pieces of the candidate physical resource subsets, M of the candidate physical resource subsets, in P The sequence number of the candidate physical resource subset is index _m = m + A, = 0, 1, 2, ..., Μ -1

Where △ is determined according to the cell identity or the user identity, The control information transmitting apparatus according to any one of claims 13 to 15, wherein the physical resource set 1 is a set of all physical resources included in a system bandwidth, or the physical resource set 1 And removing, from the physical resources included in the system bandwidth, a set of physical resources other than physical resources that cannot be sent by the system, or the physical resource set 1 is the control information sending device and the user. A collection of physical resources known to the device.  The control information transmitting apparatus according to any one of claims 13 to 16, wherein the physical resources included in the physical resource subset are continuous or discrete in the frequency domain.  The control information transmitting apparatus according to any one of claims 13 to 17, wherein the physical resource subset and the physical resource occupied by one candidate downlink control channel of the aggregation level L are the same size.  19. A control information receiving apparatus, comprising:  a determining module, configured to determine, according to a physical resource set 2 of the control information receiving device, a plurality of physical resource subsets included in the physical resource set 1 Or a plurality of physical resource subsets corresponding to the candidate downlink control channels, and sending the determined subset of physical resources to the search module; the physical resources included in each physical resource subset included in the physical resource set 1 can accommodate the aggregate a candidate downlink control channel of level L, the physical resource set 2 is a subset of the physical resource set 1; the search module is configured to search for the physical resource subset sent by the determining module Control information carried by the downlink control channel sent by the base station to the control information receiving apparatus.  20. Apparatus according to claim 19 wherein:  The determining module is further configured to determine a candidate physical resource subset in the plurality of the physical resource subsets, where the physical resource set 2 includes the physical resource of the candidate physical resource subset, or the physical resource The set 2 includes a start position of the candidate physical resource subset; the determining module is further configured to: if the candidate physical resource subset P is equal to the control information receiving device, the aggregation level is L And the number M of the candidate downlink control channels, the M candidate downlink control channels of the aggregation level L corresponding to the control information receiving device are respectively corresponding to the P subsets of the candidate physical resources; or The determining module is further configured to: if the number P of the candidate physical resource subsets is smaller than the Controlling, by the information receiving device, the number M of candidate downlink control channels of the aggregation level L, and selecting the downlink control of the P candidates from the M candidate downlink control channels of the aggregation level L corresponding to the control information receiving device Channel - a subset of physical resources corresponding to the P candidates; or  The determining module is further configured to: if the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels whose aggregation level is L corresponding to the control information receiving apparatus, Selecting, by the Pth candidate physical resource subsets, the M candidate subsets of the physical resources, and correspondingly selecting the M candidate downlink control channels of the aggregation level L corresponding to the control information receiving apparatus to the M A subset of candidate physical resources.  The device according to claim 20, wherein the mapping module selects M of the candidate physical resource subsets from the P candidate physical resource subsets, in the P  P The sequence number of the candidate physical resource subset is index _m = m + A, m = 0, 1, 2, ..., -1 , or  M  P , for index _m = * + A, = 0,1,2, ..., M-1 , where, according to the cell identifier or user  M Knowledge is determined.  The device according to any one of claims 19 to 21, wherein the physical resource set 1 is a set of all physical resources included in a system bandwidth, or the physical resource set 1 is a system bandwidth. And removing, by the system, a set of physical resources other than a physical resource that the system does not transmit the downlink control channel, or the physical resource set 1 is known by the base station and the control information receiving device. A collection of physical resources.  The apparatus according to any one of claims 19 to 22, wherein the physical resources included in the physical resource subset are continuous or discrete in the frequency domain.  The apparatus according to any one of claims 19 to 23, wherein the physical resource subset and the physical resource size occupied by one candidate downlink control channel of the aggregation level L are the same.  25. A method of transmitting control information, comprising:  The base station determines, in the N physical resource subsets included in the physical resource set A, the N candidate downlink control channels with the aggregation level L corresponding to the user equipment, the corresponding physical resource subset; the physical resource set A is the base station. a set of physical resources allocated for the user equipment; Sending, by the base station, downlink control to the user equipment on a subset of the physical resources Control information carried by the channel.  26. The method of claim 25, wherein each of said physics  R The sequence number of the physical resource at the beginning of the resource subset is index^ = n * + Δ, n = 0,1,2,...,N-1  N Where R is the total number of physical resources included in the physical resource set, n is the number of each physical resource subset, and the Δ is determined according to the cell identifier or the user identifier.  The method according to claim 25 or 26, wherein the base station corresponds to the N candidate downlink control channels with an aggregation level of L corresponding to the user equipment, corresponding to the N physical resources. Subsets, including:  And the base station sequentially, according to the number of the candidate downlink control channel, N candidate downlink control channels to the N physical resource subsets in sequence;  If one of the physical resource subsets XI cannot accommodate one candidate downlink control channel Y of the aggregation level corresponding to the user equipment, the base station may not be able to correspond to the candidate downlink control on the physical resource subset XI. The logical physical resources of channel Y are in turn corresponding to the physical resources on the next physical resource subset X2 of the physical resource subset XI.  The method according to claim 27, further comprising:  If the physical resource subset XI is the last physical resource subset of the N physical resource subsets, the base station will not be able to correspond to the logical physical resource corresponding to the candidate downlink control channel Y on the physical resource subset XI. Go to the physical resource on the first subset of physical resources.  The method according to any one of claims 25 to 28, wherein the physical resource allocated by the base station to the user equipment is a resource block pair, an enhanced control channel unit or an enhanced resource unit group.  30. A method for receiving control information, comprising:  The user equipment determines, in the N physical resource subsets included in the physical resource set A, the N candidate downlink control channels whose aggregation level is L corresponding to the user equipment, and the corresponding physical resource subset; the physical resource set A is a set of physical resources allocated by the base station to the user equipment;  The user equipment searches for control information carried by the downlink control channel sent by the base station to the user equipment on the N subsets of the physical resources.  3. The method of claim 30, wherein each of said physics  R The sequence number of the physical resource at the beginning of the resource subset is α = η * + Δ, η = 0, 1, 2, ..., N-1 Ν Where R is the total number of physical resources included in the physical resource set, n is the number of each physical resource subset, and the Δ is determined according to the cell identifier or the user identifier.  The method according to claim 30 or 31, wherein the user equipment corresponds to the N candidate downlink control channels with the aggregation level L corresponding to the user equipment, corresponding to the N physicals. A subset of resources, including:  And N candidate downlink control channels with an aggregation level of L corresponding to the user equipment are sequentially corresponding to the N physical resource subsets according to the number of the candidate downlink control channel with the aggregation level of the user equipment corresponding to the user equipment ;  If one of the physical resource subsets XI cannot accommodate a candidate downlink control channel Y of the aggregation level L, the logical physical resources of the candidate downlink control channel Y that cannot be corresponding to the physical resource subset XI are sequentially mapped to The physical resource subset XI is on the physical resource on the next physical resource subset X2.  33. The method according to claim 32, further comprising:  If the physical resource subset XI is the last physical resource subset of the N physical resource subsets, the logical physical resources of the candidate downlink control channel Y that cannot be corresponding to the physical resource subset XI are corresponding to the first On a physical resource on a subset of physical resources.  The method according to any one of claims 30 to 33, wherein the physical resource allocated by the base station to the user equipment is a resource block pair, an enhanced control channel unit or an enhanced resource unit group.  35. A control information transmitting apparatus, comprising:  a determining module, configured to determine, in the N physical resource subsets included in the physical resource set A, the N candidate downlink control channels corresponding to the aggregation level of the user equipment, the corresponding physical resource subset, and send the module to the sending module Sending the determined subset of physical resources; the physical resource set A is a set of physical resource components allocated by the device for the user equipment;  And a sending module, configured to send, to the user equipment, control information carried by the downlink control channel, on the one of the physical resource subsets sent by the determining module.  The control information transmitting apparatus according to claim 35, wherein the physical resource of the starting position of each of the physical resource subsets has a sequence number of inde ― + A, n = 0, l, 2 ,..., N - l , where R is the physical resource included in the set of physical resources  N The total number of sources, n is the number of each physical resource subset, and the Δ is determined according to the cell identifier or the user identifier. 37. A control information transmitting apparatus according to claim 35 or 36, characterized by:  The determining module is further configured to: sequentially correspond to N candidate downlink control channels with an aggregation level of L corresponding to the user equipment according to the number of the candidate downlink control channel whose aggregation level is L corresponding to the user equipment. Go to the N subset of physical resources;  The determining module is further configured to: if one of the physical resource subsets XI cannot accommodate a candidate downlink control channel Y with a corresponding aggregation level L, the candidate downlink may not be corresponding to the candidate downlink of the physical resource subset XI. The logical physical resources of the control channel Y are in turn corresponding to the physical resources on the next physical resource subset X2 of the physical resource subset XI.  The control information transmitting apparatus according to claim 37, wherein: the determining module is further configured to: if the physical resource subset XI is the last physical resource subset of the N physical resource subsets, The logical physical resources corresponding to the candidate downlink control channel Y on the physical resource subset XI correspond to physical resources on the first physical resource subset.  The control information transmitting apparatus according to any one of claims 35 to 38, wherein the physical resource allocated to the user equipment is a resource block pair, an enhanced control channel unit, or an enhanced resource unit group.  40. A control information receiving apparatus, comprising:  a determining module, configured to determine, in the N physical resource subsets included in the physical resource set A, a subset of physical resources corresponding to the N candidate downlink control channels of the aggregation level L corresponding to the control information receiving apparatus, and The N candidate downlink control channels of the aggregation level L corresponding to the control information receiving device are sent to the search module; the physical resource set A is the physics allocated by the base station to the control information receiving device. The search module of the resource component is configured to search, on the N pieces of the physical resources sent by the determining module, control information carried by the downlink control channel sent by the base station to the control information receiving apparatus.  41. Apparatus according to claim 40, wherein each of said physics  R The serial number of the physical resource at the beginning of the resource subset is index^ = n + A, n = 0,\,2,...,N- \  N Where R is the total number of physical resources included in the physical resource set, and n is each physical resource The number of the subset, the Δ is determined according to the cell identifier or the user identifier.  A control information receiving apparatus according to claim 40 or 41, characterized by:  The determining module is further configured to: according to the number of the candidate downlink control channel with the aggregation level L corresponding to the control information receiving device, the N candidate downlink control channels with the aggregation level of L corresponding to the control information receiving device— - the sequence corresponds to the N subsets of physical resources; the determining module is further configured to: if one of the physical resource subsets XI cannot accommodate a candidate downlink control channel Y of an aggregation level L, The logical physical resources of the candidate downlink control channel Y on the physical resource subset XI are sequentially corresponding to the physical resources on the next physical resource subset X2 of the physical resource subset XI.  The control information receiving apparatus according to claim 42, wherein: the determining module is further configured to: if the physical resource subset XI is the last physical resource subset of the N physical resource subsets, The logical physical resources corresponding to the candidate downlink control channel Y on the physical resource subset XI correspond to physical resources on the first physical resource subset.  The control information receiving apparatus according to any one of claims 40 to 43, wherein the physical resource allocated by the base station to the control information receiving apparatus is a resource block pair, an enhanced control channel unit, or an enhanced resource unit. group. 45. A method for transmitting control information, comprising:  For any user equipment in the user equipment set, the base station determines, according to the physical resource set 2 allocated to the user equipment, a physical resource subset corresponding to one or more candidate downlink control channels with an aggregation level L corresponding to the user equipment. The number of physical resource units corresponding to the candidate downlink control channel is R; the starting physical resource unit of the physical resource subset is the Q+X physical resource unit in the physical resource set 1, the physical resource Set 1 includes Y physical resource units, the physical resource subset includes R physical resource units; the Q can be divisible by R, X is an integer, X is greater than or equal to 1, less than or equal to Y; a subset of the physical resource set 1;  And determining, by the base station, control information carried by the downlink control channel with the aggregation level L, to the user equipment, on the determined one of the physical resource subsets. The method according to claim 45, wherein the base station determines, according to the physical resource set 2 allocated to the user equipment, that the aggregation level corresponding to the user equipment is A subset of the physical resources corresponding to the one or more candidate downlink control channels of the L, the method includes: the base station determining, in the physical resource set 2, a subset of the physical resources of the P candidates, where the candidate physical resource subsets The initial physical resource unit is the Q+X physical resource unit in the physical resource set 1; the Q can be divisible by R;  If the number P of the candidate physical resource subsets is equal to the number M of candidate downlink control channels of the aggregation level L of the user equipment, the base station sets the aggregation level of the user equipment to L Candidate downlink control channels - corresponding to P subsets of said candidate physical resources; or  If the number P of the candidate physical resource subsets is smaller than the number M of candidate downlink control channels of the aggregation level L of the user equipment, the base station has an aggregation level L corresponding to the user equipment. Selecting P candidate downlink control channels from among the candidate downlink control channels - corresponding to P candidate physical resource subsets; or  If the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels whose aggregation level is L corresponding to the user equipment, the base station selects M from the P candidate physical resource subsets. The candidate physical resource subsets, the M candidate downlink control channels of the aggregation level L of the user equipment, are corresponding to the M candidate subsets of physical resources.  47. The method according to claim 46, wherein the M candidate subsets of physical resources selected from the P candidate candidate physical resource subsets, and the P candidate physical resource subsets  P The serial number is index _m = m + A, m = 0,1,2,..., -1 , or  Μ  P Index _m = m + A, m = 0,l,2,..., - l , where △ is determined according to the cell ID or user ID,  M  The method according to any one of claims 45 to 47, wherein the physical resource set 1 is a set of all physical resources included in a system bandwidth, or the physical resource set 1 is a system bandwidth. The physical resources included in the system are configured to be a set of physical resources other than the physical resources of the downlink control channel, or the physical resource set 1 is a physical resource common to the base station and the user equipment. set.  The method according to any one of claims 45 to 48, wherein the physical resources included in the physical resource subset are continuous or discrete in the frequency domain. The method according to any one of claims 45 to 49, wherein the physical resource allocated by the base station to the user equipment is a resource block pair, an enhanced control channel unit, or an enhancement. Resource unit group.  51. A control information transmitting apparatus, comprising:  a determining module, configured to determine, according to the physical resource set 2 allocated to the user equipment, a corresponding one or more candidate downlink control channels corresponding to the aggregation level of the user equipment a physical resource subset, and sending the determined physical resource subset to the sending module; the number of physical resource units corresponding to the candidate downlink control channel is R; and the starting physical resource unit of the physical resource subset is the physical resource a Q+X physical resource unit in the set 1, the physical resource set 1 includes Y physical resource units, the physical resource subset includes R physical resource units; the Q can be divisible by R, and X is an integer. X is greater than or equal to 1 and less than or equal to Y; the physical resource set 2 is a subset of the physical resource set 1;  The sending module is configured to send, to the user equipment, control information carried by a downlink control channel with an aggregation level L, on a physical resource subset corresponding to the candidate downlink control channel sent by the determining module.  The control information sending apparatus according to claim 51, wherein: the determining module is further configured to: determine, in the physical resource set 2, a P resource candidate subset of physical resources, the candidate physical resource The starting physical resource unit of the subset is the Q+X physical resource unit in the physical resource set 1; the Q can be divisible by R;  The determining module is further configured to: if the number P of the candidate physical resource subsets is equal to the number M of candidate downlink control channels with the aggregation level L corresponding to the user equipment, the aggregation corresponding to the user equipment M candidate downlink control channels of level L - corresponding to P subsets of said candidate physical resources; or  The determining module is further configured to: if the number P of the candidate physical resource subsets is smaller than the number M of candidate downlink control channels of the aggregation level L of the user equipment, the aggregation corresponding to the user equipment Selecting P candidate downlink control channels from among the M candidate downlink control channels of level L - corresponding to P candidate physical resource subsets; or The determining module is further configured to: if the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels whose aggregation level is L corresponding to the user equipment, from the physicals of the P candidate The M subset of the resources selects the M candidate subsets of the physical resources, and the M candidate downlink control channels with the aggregation level of L corresponding to the user equipment are corresponding to the M subsets of the candidate physical resources. The control information transmitting apparatus according to claim 52, wherein the determining module selects, from the P candidate candidate physical resource subsets, the M candidate physical resource subsets, and the candidate physical resource subsets The serial number of the set is index _m = * + A, = 0, l, 2, ..., M-1, or  M  P The index is _m = m * + A, m = 0, l, 2, ..., - l , where △ is based on the cell ID or user ID  M determine.  The control information transmitting apparatus according to any one of claims 5 to 53, wherein the physical resource set 1 is a set of all physical resources included in a system bandwidth, or the physical resource set. 1 is a set of physical resources including a physical resource other than a physical resource that cannot be sent by the system, and the physical resource set 1 is the control information sending device and the physical resource included in the system bandwidth. A collection of physical resources known to the user device.  The control information transmitting apparatus according to any one of claims 51 to 54, wherein the physical resources included in the physical resource subset are continuous or discrete in a frequency domain.  The control information transmitting apparatus according to any one of claims 5 to 55, wherein the physical resource allocated by the base station to the user equipment is a resource block pair, an enhanced control channel unit, or an enhanced resource unit group. . 57. A method for receiving control information, comprising:  The user equipment determines, according to the physical resource set 2 allocated by the base station to the user equipment, a physical resource subset corresponding to one or more candidate downlink control channels with an aggregation level of L corresponding to the user equipment; the candidate downlink control channel corresponds to The number of physical resource units is R; the starting physical resource unit of the physical resource subset is the Q+X physical resource unit in the physical resource set 1, and the physical resource set 1 includes Y physical resource units The physical resource subset includes R physical resource units; the Q can be divisible by R, X is an integer, X is greater than or equal to 1, and is less than or equal to Y; and the physical resource set 2 is a child of the physical resource set 1 The user equipment searches for the control information carried by the base station to the user equipment for the downlink control channel with the aggregation level L, on the determined subset of the physical resources. The method according to claim 57, wherein the user equipment determines, according to the physical resource set 2 allocated by the base station to the user equipment, one or more candidates whose aggregation level is L corresponding to the user equipment. The physical resource subset corresponding to the downlink control channel includes: the user equipment determines, in the physical resource set 2, P candidate physical resource sub- The starting physical resource unit of the candidate physical resource subset is the Q+X physical resource unit in the physical resource set 1; the Q can be divisible by R;  If the number P of the candidate physical resource subsets is equal to the number M of candidate downlink control channels whose aggregation level is L, the user equipment sets the aggregation level of the user equipment M candidate downlink control channels - corresponding to P subsets of said candidate physical resources; or  If the number P of the candidate physical resource subsets is smaller than the number M of the candidate downlink control channels of the user equipment corresponding to the aggregation level L, the aggregation level of the user equipment corresponding to the user equipment is L. Selecting P candidate downlink control channels from among the M candidate downlink control channels, corresponding to P candidate physical resource subsets; or  If the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels with the aggregation level L corresponding to the user equipment, the user equipment selects from the P subsets of the candidate physical resources. The M candidate subsets of the physical resources, the M candidate downlink control channels of the aggregation level L of the user equipment are corresponding to the M subsets of the candidate physical resources.  59. A control information receiving apparatus, comprising:  a determining module, configured to determine, according to a physical resource set 2 allocated by the base station to the control information receiving apparatus, a physical resource subset corresponding to one or more candidate downlink control channels with an aggregation level L corresponding to the control information receiving apparatus, And sending the determined subset of physical resources to the search module; the number of physical resource units corresponding to the candidate downlink control channel is R; and the starting physical resource unit of the physical resource subset is the Q in the physical resource set 1 +X physical resource units, the physical resource set 1 includes Y physical resource units, the physical resource subset includes R physical resource units; the Q can be divisible by R, X is an integer, and X is greater than or equal to 1, Less than or equal to Y; the physical resource set 2 is a subset of the physical resource set 1;  The search module is configured to search, on a subset of all physical resources sent by the determining module, the base station to send control information carried by the downlink control channel with an aggregation level L to the control information receiving apparatus. The control information receiving apparatus according to claim 59, wherein: the determining module is further configured to: determine, in the physical resource set 2, P candidate physical resource subsets, the candidate physical resources The starting physical resource unit of the subset is the Q+X physical resource unit in the physical resource set 1; the Q can be divisible by R; The determining module is further configured to: if the number P of the candidate physical resource subsets is equal to the number M of candidate downlink control channels of the aggregation level L corresponding to the control information receiving apparatus, receive the control information The M candidate downlink control channels with the aggregation level L corresponding to the device correspond to the P subsets of the candidate physical resources one by one; or  The determining module is further configured to: if the number P of the candidate physical resource subsets is smaller than the number M of candidate downlink control channels with an aggregation level L corresponding to the control information receiving apparatus, receive the control information And selecting, by the M candidate downlink control channels of the aggregation level L, the P downlink control channels of the candidate, corresponding to the P physical resources subset of the candidate; or  The determining module is further configured to: if the number P of the candidate physical resource subsets is greater than the number M of candidate downlink control channels whose aggregation level is L corresponding to the control information receiving apparatus, Selecting, by the P subset of the candidate physical resource subsets, the M candidate subsets of the physical resources, and selecting the M candidate downlink control channels of the aggregation level L of the control information receiving apparatus to correspond to the M A subset of candidate physical resources.  61. The control information receiving apparatus according to claim 60, wherein the determining module selects, from the P candidate candidate physical resource subsets, the M candidate physical resource subsets,  P The sequence number in the P candidate candidate resource resource subset is index _m = * + A, = 0, l, 2, ..., M-1, or  M  P The index is _m = m * + A, m = 0, l, 2, ..., - l , where △ is based on the cell ID or user ID  M determine.