CN109818728B

CN109818728B - Enhanced physical downlink control channel transmission method and device

Info

Publication number: CN109818728B
Application number: CN201910127232.6A
Authority: CN
Inventors: 刘鹍鹏; 高驰; 刘江华; 刘建琴
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-08-02
Filing date: 2012-09-28
Publication date: 2023-05-09
Anticipated expiration: 2032-09-28
Also published as: CN109905221A; CN109818728A; CN104871589B; CN104871589A; CN109905221B

Abstract

The application provides an enhanced downlink physical control channel transmission method and device. The method comprises the following steps: in a physical resource block set, respectively ordering a first resource group in each physical resource block pair, wherein the first resource group is a resource element group eREG or REG, and the physical resource block set comprises at least one physical resource block pair; numbering a second resource group in the physical resource block set according to the corresponding relation between the first resource group and the second resource group, wherein the second resource group is a control channel unit (eCCE) group or a control channel candidate group; determining the number of the second resource group transmitting E-PDCCH; and mapping the E-PDCCH to a corresponding first resource group for transmission according to the determined number. The technical scheme solves the problem of E-PDCCH transmission.

Description

Enhanced physical downlink control channel transmission method and device

Technical Field

The present invention relates to communications technologies, and in particular, to a method and apparatus for transmitting an enhanced physical downlink control channel.

Background

In LTE Release 8/9/10, a physical downlink control channel (Physical Downlink Control Channel, abbreviated as PDCCH) is transmitted on the first N (n=1, 2,3, 4) orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, abbreviated as OFDM) symbols of each subframe, and is multiplexed with a physical downlink shared channel (Physical Downlink Shared Channel, abbreviated as PDSCH) in a Time-division multiplexing (Time-Division Multiplexing, abbreviated as TDM) manner, where a demodulation pilot is a downlink common pilot, that is, a Cell-specific RS (abbreviated as CRS), and in order to ensure the reliability of transmission, a transmission manner of a space-frequency code (Space Frequency Block Code, abbreviated as SFBC) or SFBC combined with frequency-domain selective transmit diversity (Frequency Switched Transmit Diversity, abbreviated as FSTD) is adopted.

With the large-scale deployment of heterogeneous networks, in Rel-11, PDCCH is challenged in terms of capacity, coverage, coordinated interference, etc., and thus Enhanced-PDCCH (E-PDCCH) is proposed. The E-PDCCH is positioned in a PDSCH region, the multiplexing mode of the E-PDCCH and the PDSCH is frequency division multiplexing (Frequency Division Multiplexing, FDM), and in addition, the E-PDCCH does not support multiplexing of an enhanced control channel and a service channel in one time-frequency resource block; the E-PDCCH is demodulated based on a User Equipment (UE) specific demodulation reference signal (Demodulation Reference Signals, DMRS). As can be seen from the above, the time-frequency resource occupied by the E-PDCCH is different from the PDCCH in the prior art, and the E-PDCCH cannot be transmitted directly by using the manner of transmitting the PDCCH, so that the problem of transmitting the E-PDCCH needs to be solved.

Disclosure of Invention

The embodiment of the invention provides a method and a device for transmitting an enhanced downlink physical control channel (PDCCH), which are used for solving the problem of E-PDCCH transmission.

An embodiment of the present invention provides a method for transmitting an enhanced physical downlink control channel, including: in a physical resource block set, respectively sequencing a first resource group in each physical resource block pair PRB pair, wherein the first resource group is a resource element group eREG or REG, and the physical resource block set comprises at least one physical resource block pair; numbering a second resource group according to the corresponding relation between the first resource group and the second resource group in the physical resource block set, wherein the second resource group is a control channel unit (eCCE) group or a control channel candidate group; determining the number of a second resource group for transmitting the E-PDCCH; and mapping the E-PDCCH to the corresponding first resource group for transmission according to the determined number.

In any of the above alternative embodiments of the method, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, and in the physical resource block sets, a number set of the first resource groups included in each third resource group in one physical resource block pair is the same as a number set of the first resource groups included in one third resource group in each other physical resource block pair; numbering the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set includes: and each third resource group corresponds to a second resource group of the first type, and the second resource groups of the first type in each physical resource block pair are numbered sequentially according to the sequence from small to large or from large to small of the numbers of the physical resource block pairs, wherein in each physical resource block pair, the numbers of the second resource groups of the first type and the numbers of the first resource groups corresponding to the second resource groups of the first type have a corresponding relationship.

In any optional implementation manner of the above method, in each physical resource block pair, a correspondence exists between a number of the second resource group of the first type and a number of the first resource group corresponding to the second resource group of the first type, including:

In each physical resource block pair, the numbers of the second resource groups of the first type are continuous, and the sequence of the numbers of the second resource groups of the first type is the same as the sequence of the maximum numbers or the minimum numbers of the first resource groups corresponding to the second resource groups of the first type.

In any optional implementation manner of the above method, numbering the second resource group according to a correspondence between the first resource group and the second resource group in the physical resource block set includes:

determining the number of the second resource group of the first type according to the following formula:

j＝K*m+(i mod K)，

where i is the number of the first resource group, i is an integer from 0 to L-1, L is the number of the first resource group in one physical resource block pair, j is the number of the second resource group of the first type, M is the number of the physical resource block pair, K is the number of the second resource group of the first type in each physical resource block pair, mod represents a modulo operation, the second resource group of the first type corresponds to M first resource groups belonging to the same physical resource block pair, and M is a positive integer.

In any of the above alternative embodiments of the method, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, in the physical resource block sets, a number set of the first resource groups included in each third resource group in one physical resource block pair is the same as a number set of the first resource groups included in one third resource group in each other physical resource block pair, and in each physical resource block pair, a sequence of numbers of the third resource groups is the same as a sequence of maximum numbers or minimum numbers of the first resource groups in the third resource groups; numbering the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set includes: and each third resource group corresponds to a second resource group of the first type, the second resource groups of the first type corresponding to the third resource groups with the same number are sequentially numbered according to the sequence of the third resource group numbers from small to large or from large to small, and the sequence of the numbers of the second resource groups of the first type and the sequence of the numbers of the physical resource block pairs where the second resource groups of the first type are located are in the second resource groups of the first type corresponding to the third resource groups with the same number.

In any optional implementation manner of the above method, in the second resource group of the first type corresponding to the third resource group having the same number, there is a correspondence between an order of numbers of the second resource group of the first type and an order of numbers of the physical resource block pairs where the second resource group of the first type is located, including:

in the second resource group of the first type corresponding to the third resource group with the same number, the numbers of the second resource group of the first type are continuous, and the sequence of the numbers of the second resource group of the first type is the same as the sequence of the numbers of the physical resource block pairs where the second resource group of the first type is located.

j＝(i mod K)*K+m，

In any optional implementation manner of the above method, for the second resource group of the first type corresponding to the third resource group with the same number, the mapping relationship between the second resource group of the first type in one physical resource block pair and the first resource group contained therein is a cyclic shift of the mapping relationship between the second resource group of the first type in each other physical resource block pair and the first resource group contained therein.

the second resource group of the second type comprises M first resource groups respectively belonging to different physical resource block pairs;

and using the number of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type as the number of the second resource group of the second type.

determining the number of the second resource group of the second type according to the following formula:

j＝(i-K*m)mod16，

Where i is the number of the first resource group, i is an integer from 0 to L-1, L is the number of the first resource group in one physical resource block pair, j is the number of the second resource group of the second type, m is the number of the physical resource block pair, K is the number of the second resource group of the second type in each physical resource block pair, mod represents a modulo operation; or alternatively

i＝(j+x*K)mod N，

m＝(floor(j/(M*K))*M+x)mod C，

where i is the number of the x first resource group corresponding to the second resource group of the second type with the number j, i is an integer from 0 to L-1, L is the number of the first resource group in one of the physical resource block pairs, m is the number of the physical resource block pair where the x first resource group corresponding to the second resource group of the second type with the number j is located, k=floor (P/O), P is the number of the first resource group in one of the physical resource block pairs, O is the number of the first resource group contained in one of the second resource groups, C is the number of the physical resource block pairs in the physical resource block set, mod represents a modulo operation, and floor represents a downward rounding operation.

The second resource group of the second type comprises M first resource groups respectively belonging to different physical resource block pairs, the physical resource block set comprises K sets of the second resource groups of the second type, K is a positive integer, and the mapping relation between one second resource group of the second type and the first resource group contained in the second resource group of the second type is the cyclic shift of the mapping relation between the second resource group of the other second type and the first resource group contained in the second resource group of the second type in each set of the K sets;

numbering the second resource group of the second type according to the magnitude relation of the numbers of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type in each of the K sets;

the sequence of the numbers of the second resource groups of the second type is the same as the sequence of the largest or smallest numbers of the first resource groups corresponding to different sets of the K sets in the same physical resource block pair between different sets of the K sets.

In any of the above optional embodiments of the method, the set of physical resource blocks includes a set of K second resource groups of a second type, and in each of the K sets, a mapping relationship between a second resource group of the second type and a first resource group included therein is a cyclic shift of a mapping relationship between a second resource group of each other second type and the first resource group included therein.

In any of the above optional embodiments of the method, if the first resource group corresponding to the second resource group of the at least two first types in the set of physical resource blocks is the same as the first resource group corresponding to the second resource group of the at least two second types in the set of physical resource blocks, the set of numbers of the second resource group of the at least two first types is the same as the set of numbers of the second resource group of the at least two second types.

In any optional implementation manner of the above method, the second resource group of the first type in the physical resource block set is a resource group adopting centralized transmission E-PDCCH; the second resource group of the second type in the physical resource block set is a resource group adopting a discrete transmission E-PDCCH.

A second aspect of an embodiment of the present invention provides a transmission apparatus for an enhanced physical downlink control channel E-PDCCH, including:

the ordering unit is used for respectively ordering a first resource group in each physical resource block pair in the physical resource block set, wherein the first resource group is a resource element group eREG or REG, and the physical resource block set comprises at least one physical resource block pair;

a numbering unit, configured to number a second resource group according to a correspondence between the first resource group and a second resource group in the physical resource block set, where the second resource group is a control channel unit eCCE group or a control channel candidate group;

A fifth determining unit, configured to determine a number of a second resource group transmitting the E-PDCCH;

and the transmission unit is used for mapping the E-PDCCH to the corresponding first resource group for transmission according to the determined number.

In any optional implementation manner of the above method, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, in the physical resource block set, a number set of the first resource group included in each third resource group in one physical resource block pair is the same as a number set of the first resource group included in one third resource group in each other physical resource block pair, and each third resource group corresponds to one second resource group of the first type; the numbering unit is used for sequentially numbering the second resource groups of the first type in each physical resource block pair according to the sequence from small to large or from large to small of the numbers of the physical resource block pairs, wherein in each physical resource block pair, the numbers of the second resource groups of the first type and the numbers of the first resource groups corresponding to the second resource groups of the first type have a corresponding relation.

In any optional implementation manner of the above method, in each physical resource block pair, a correspondence exists between a number of the second resource group of the first type and a number of the first resource group corresponding to the second resource group of the first type, including: in each physical resource block pair, the numbers of the second resource groups of the first type are continuous, and the sequence of the numbers of the second resource groups of the first type is the same as the sequence of the maximum numbers or the minimum numbers of the first resource groups corresponding to the second resource groups of the first type.

In any of the alternative embodiments of the above method, the numbering unit is configured to determine the number of the second resource group of the first type according to the following formula:

j＝K*m+(i mod K)，

In any of the above alternative embodiments of the method, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, in the physical resource block sets, a number set of the first resource group included in each third resource group in one physical resource block pair is the same as a number set of the first resource group included in one third resource group in each other physical resource block pair, in each physical resource block pair, a sequence of numbers of the third resource groups is the same as a sequence of a maximum number or a minimum number of the first resource groups in the third resource groups, and each third resource group corresponds to one second resource group of the first type; the numbering unit is used for sequentially numbering the second resource groups of the first type corresponding to the third resource groups with the same number according to the sequence of the third resource groups from small to large or from large to small, and the sequence of the numbers of the second resource groups of the first type and the sequence of the numbers of the physical resource block pairs where the second resource groups of the first type are located are in the second resource groups of the first type corresponding to the third resource groups with the same number.

j＝(i mod K)*K+m，

In any optional implementation manner of the above method, the second resource group of the second type includes M first resource groups respectively belonging to different physical resource block pairs;

the numbering unit is configured to use, as the number of the second resource group of the second type, the number of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type.

In any of the alternative embodiments of the above method, the numbering unit is configured to determine the number of the second resource group of the second type according to the following formula:

j＝(i-K*m)mod16，

The numbering unit is configured to determine the number of the second resource group of the second type according to the following formula:

i＝(j+x*K)mod N，

m＝(floor(j/(M*K))*M+x)mod C，

In any optional implementation manner of the above method, the second resource group of the second type includes M first resource groups respectively belonging to different physical resource block pairs, the physical resource block set includes sets of K second resource groups of the second type, K is a positive integer, and in each set of the K sets, a mapping relationship between a second resource group of the second type and a first resource group included therein is a cyclic shift of mapping relationships between other second resource groups of the second type and the first resource groups included therein; the numbering unit is used for numbering the second resource group of the second type according to the size relation of the numbers of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type in each of the K sets; the sequence of the numbers of the second resource groups of the second type is the same as the sequence of the largest or smallest numbers of the first resource groups corresponding to different sets of the K sets in the same physical resource block pair between different sets of the K sets.

In any of the above optional embodiments of the method, the physical resource set includes a set of K second resource groups of a second type, and in each of the K sets, a mapping relationship between a second resource group of a second type and a first resource group included therein is a cyclic shift of mapping relationships between other second resource groups of each second type and the first resource group included therein.

A third aspect of an embodiment of the present invention provides a transmission apparatus for an enhanced physical downlink control channel E-PDCCH, including:

A transceiver for transceiving signals;

a processor for performing the steps of:

in a physical resource block set, respectively sequencing a first resource group in each physical resource block pair PRB pair, wherein the first resource group is a resource element group eREG or REG, and the physical resource block set comprises at least one physical resource block pair;

numbering a second resource group according to the corresponding relation between the first resource group and the second resource group in the physical resource block set, wherein the second resource group is a control channel unit (eCCE) group or a control channel candidate group;

determining the number of a second resource group for transmitting the E-PDCCH;

and mapping the E-PDCCH to the corresponding first resource group for transmission according to the determined number.

In any of the above alternative embodiments of the method, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, and in the physical resource block sets, a number set of the first resource groups included in each third resource group in one physical resource block pair is the same as a number set of the first resource groups included in one third resource group in each other physical resource block pair;

The processor is configured to number a second resource group according to a correspondence between the first resource group and the second resource group in the physical resource block set by: and each third resource group corresponds to a second resource group of the first type, and the second resource groups of the first type in each physical resource block pair are numbered sequentially according to the sequence from small to large or from large to small of the numbers of the physical resource block pairs, wherein in each physical resource block pair, the numbers of the second resource groups of the first type and the numbers of the first resource groups corresponding to the second resource groups of the first type have a corresponding relationship.

In any of the optional embodiments of the above method, the processor is configured to number the second resource group according to a correspondence between the first resource group and the second resource group in the physical resource block set by:

j＝K*m+(i mod K)，

In any of the above alternative embodiments of the method, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, in the physical resource block sets, a number set of the first resource groups included in each third resource group in one physical resource block pair is the same as a number set of the first resource groups included in one third resource group in each other physical resource block pair, and in each physical resource block pair, a sequence of numbers of the third resource groups is the same as a sequence of maximum numbers or minimum numbers of the first resource groups in the third resource groups; the processor is configured to number a second resource group according to a correspondence between the first resource group and the second resource group in the physical resource block set by: and each third resource group corresponds to a second resource group of the first type, the second resource groups of the first type corresponding to the third resource groups with the same number are sequentially numbered according to the sequence of the third resource group numbers from small to large or from large to small, and the sequence of the numbers of the second resource groups of the first type and the sequence of the numbers of the physical resource block pairs where the second resource groups of the first type are located are in the second resource groups of the first type corresponding to the third resource groups with the same number.

j＝(i mod K)*K+m，

In any of the optional embodiments of the above method, the processor is configured to implement the processor to number the second resource group according to a correspondence between the first resource group and the second resource group in the set of physical resource blocks by:

j＝(i-K*m)mod16，

i＝(j+x*K)mod N，

m＝(floor(j/(M*K))*M+x)mod C，

According to the enhanced physical downlink control channel transmission method and device provided by the embodiment of the invention, the number of the second resource group is determined according to the relation between the first resource group and the second resource group, then the number of the second resource group for transmitting the E-PDCCH is determined, and the E-PDCCH is mapped to the corresponding first resource group for transmission, so that the problem of E-PDCCH transmission is solved, and blind detection is facilitated according to the numbering method in the scheme.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1A is a flowchart of a method for transmitting an E-PDCCH according to an embodiment of the present invention;

fig. 1B is a flowchart of a method for receiving an E-PDCCH according to an embodiment of the present invention;

fig. 2A is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 2B is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 3A is a schematic structural diagram of a base station according to another embodiment of the present invention;

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

fig. 4A is a flowchart of another E-PDCCH transmission method according to an embodiment of the present invention;

FIGS. 4B-4E are diagrams illustrating various numbering results provided in one embodiment of the invention;

FIG. 5 is a schematic structural diagram of a numbering device according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a numbering device according to another embodiment of the present invention;

fig. 7A is a flowchart of a control channel detection method according to an embodiment of the present invention;

fig. 7B and fig. 7C are schematic diagrams of a first set of physical resource blocks and a second set of physical resource blocks according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a UE according to another embodiment of the present invention;

fig. 9 is a schematic structural diagram of a base station according to another embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Fig. 1A is a flowchart of an E-PDCCH transmission method according to an embodiment of the present invention. The execution subject of the present embodiment may be a base station, for example, a base station in an LTE system. As shown in fig. 1A, the method of this embodiment includes:

Step 101, according to the mapping relation between the first resource group and the pilot port, determining the corresponding relation between the second resource group of the first type and the first resource group and the pilot port, and the corresponding relation between the second resource group of the second type and the first resource group and the pilot port according to the specific relation.

The mapping relation between the first resource group and the pilot port is obtained in advance by the base station. The method for the base station to obtain the mapping relationship between the first resource group and the pilot port in advance includes, but is not limited to, the following methods: the mapping relation between the first resource group and the pilot port is predefined by the base station and the User Equipment (UE for short). Or the base station generates the mapping relation between the first resource group and the pilot frequency port according to the local cell Identification (ID). Optionally, the base station may further send higher layer signaling to the UE, where the higher layer signaling includes a mapping relationship between the first resource group and the pilot port.

The mapping relation between the first resource group and the pilot frequency port comprises the mapping relation between at least one first resource group and at least one pilot frequency port in one physical resource unit set; the set of physical resource units is at least one physical resource block pair (PRB pair in english). The first resource group is a resource element group (eREG) or REG; the second resource group of the first type is an control channel element (eCCE) or a control channel candidate, and the second resource group of the second type is an eCCE or a control channel candidate. The second resource group of the first type corresponds to at least two first resource groups, and the second resource group of the second type corresponds to at least two first resource groups. The correspondence here mainly means that the second resource group of the first type and the second type may consist of at least two first resource groups. The specific relationship is satisfied between the corresponding relationship between the second resource group of different types and the first resource group and the pilot port. The pilot port in this embodiment mainly refers to a DMRS port.

As can be seen from the above, the second resource group of the present embodiment includes two types, that is, the first type of second resource group and the second type of second resource group. Optionally, the second resource group of the first type is a resource group when the E-PDCCH is transmitted in a centralized manner, and the second resource group of the second type is a resource group when the E-PDCCH is transmitted in a discrete manner. Herein, centralized transmission means that the resource allocation for transmitting the E-PDCCH is concentrated in one or several consecutive pairs of physical resource blocks, and discrete transmission means that the resource allocation for transmitting the E-PDCCH is dispersed in a plurality of discrete pairs of physical resource blocks. Here, in Rel11, SFBC is not supported when E-PDCCH is transmitted in a discrete manner, and a multi-user common precoding (random beamforming) mechanism is used.

With the first resource group as eREG, an optional mapping relationship between the first resource group and the pilot port is shown in table 1.

TABLE 1

eREG location index (index)	DMRS port (port)
		eREG(0)	Port 7
eREG(1)	Port 9
		eREG(2)	Port 8
eREG(3)	Port 10
		eREG(4)	Port 9
eREG(5)	Port 7
		eREG(6)	Port 10
eREG(7)	Port 8

As shown in table 1, the set of physical resource elements is one physical resource block pair, and the physical resource block pair includes 8 eregs, where the 8 eregs are mapped to 4 DMRS ports, i.e., DMRS port 7, DMRS port 8, DMRS port 9, and DMRS port 10, respectively, and the mapping relationship between each eREG and DMRS port is not limited to that shown in table 1.

Based on table 1 above, an alternative correspondence between the second resource groups of the first type and the second type and the first resource groups and the pilot ports is shown in table 2.

TABLE 2

As shown in table 2, the set of physical resource blocks used for transmitting the E-PDCCH includes 4 physical resource block pairs, i.e., physical resource block pairs with

indexes

1, 2, 3 and 4, respectively, each physical resource block pair including 8 eregs. In each physical resource block pair, each eREG has a unique location index (e.g., numbers 0-7 in brackets following the eREG in table 1 or table 2), where the location index of the eREG is the same for physical resource block pairs that include the same number of eregs. The second resource group of the first type is formed by at least two eregs in the same physical resource block pair, and taking the case that the second resource group of the first type is formed by two eregs in the same physical resource block pair, the second resource group of the first type may be formed by eregs (0) and eregs (1) in the physical resource block pair with index 1 in table 2, the corresponding pilot ports are

DMRS ports

7 and 9, or eregs (2) and eregs (3) in the physical resource block pair with index 1, the corresponding pilot ports are

DMRS ports

8 and 10, or eregs (4) and eregs (5) in the physical resource block pair with index 1, the corresponding pilot ports are

DMRS ports

9 and 7, or eregs (6) and eregs (7) in the physical resource block pair with index 1, and the corresponding pilot ports are

DMRS ports

10 and 8, or eregs in the physical resource block pair with index 2, which are not listed. The second resource group of the second type is formed by at least two eregs in different physical resource block pairs, and the second resource group of the second type is formed by two eregs in different physical resource block pairs as an example, and then the second resource group of the second type may be formed by eregs (0) in the physical resource block pair with index 3 and eregs (0) in the physical resource block pair with index 4 in table 2, the corresponding pilot port is DMRS port 7, or may be formed by eregs (1) in the physical resource block pair with index 3 and eregs (4) in the physical resource block pair with index 4, the corresponding pilot port is DMRS port 9, or may be formed by eregs (6) in the physical resource block pair with index 2 and eregs (7) in the physical resource block pair with index 3, the corresponding pilot ports are

DMRS ports

10 and 8, and so on. As shown in table 2, once the eregs constituting the second resource group of the first type or the second type are determined, the pilot ports corresponding to the second resource group of the first type or the second type are also determined.

Here, table 2 shows that the set of physical resource blocks used for transmitting the E-PDCCH includes 4 physical resource block pairs, but is not limited thereto.

Step 102, determining at least one first type of second resource group or second type of second resource group for transmitting the E-PDCCH, and mapping the at least one first type of second resource group or second type of second resource group for transmitting the E-PDCCH onto the at least one first resource group and pilot port according to the determined correspondence between the first type or second type of second resource group and the first resource group and pilot port.

If the centralized transmission of the E-PDCCH is required, the base station determines a second resource group of at least one first type for transmitting the E-PDCCH, and maps the second resource group of at least one first type for transmitting the E-PDCCH to at least one first resource group and pilot port for transmission according to the corresponding relationship between the second resource group of the first type and the first resource group and the pilot port determined previously.

If the E-PDCCH needs to be transmitted in a discrete mode, the base station determines at least one second resource group of a second type for transmitting the E-PDCCH, and then maps the at least one second resource group of the second type for transmitting the E-PDCCH to at least one first resource group and pilot port for transmission according to the corresponding relation between the second resource group of the second type and the first resource group and the pilot port, which are determined before.

In the prior art, the transmission of the PDCCH adopts CRS transmission, all CCEs for transmitting the PDCCH are mapped to the same CRS port, and SFBC or SFBC and FSTD are adopted for transmission. The E-PDCCH is transmitted by using DMRS, and precoding (english is precoding) is needed on the DMRS, so that the E-PDCCH needs to be explicitly transmitted, or the corresponding relationship between the physical channel candidate and the DMRS port is needed to accurately complete demodulation, and therefore, the method for transmitting the PDCCH in the prior art is not suitable for the E-PDCCH any more. According to the mapping relation between the first resource group and the pilot port, the corresponding relation between the first type second resource group and the first resource group and the pilot port, and the corresponding relation between the second type second resource group and the first resource group and the pilot port are determined, then the second resource group (either the first type second resource group or the second type second resource group) used for transmitting the E-PDCCH is determined, and then the second resource group for transmitting the E-PDCCH is mapped to the corresponding first resource group and the corresponding pilot port for transmission according to the corresponding relation between the determined two types of second resource groups and the first resource group and the pilot port, so that the problem of transmitting the E-PDCCH is solved, and meanwhile, the basis is laid for correctly demodulating the E-PDCCH.

In an alternative implementation of this embodiment, another alternative mapping relationship between the first resource group and the pilot port is shown in table 3.

TABLE 3 Table 3

eREG location index (index)	DMRS port (port)
		eREG(0)	Port 7
eREG(1)	Port 8
		eREG(2)	Port 8
eREG(3)	Port 7
		eREG(4)	Port 9
eREG(5)	Port 10
		eREG(6)	Port 10
eREG(7)	Port 9

As shown in table 3, the set of physical resource elements is one physical resource block pair, where each physical resource block pair includes 8 eregs, and the 8 eregs are mapped to 4 DMRS ports, that is, DMRS port 7, DMRS port 8, DMRS port 9, and DMRS port 10, respectively, and the mapping relationship between each eREG and DMRS port is different from that in table 1, but the mapping relationship between eregs and DMRS ports is not limited to those shown in tables 1 and 3.

Based on the above table 3, another alternative correspondence between the second resource group of the first type and the second type and the first resource group and the pilot port is shown in table 4.

TABLE 4 Table 4

As shown in table 4, the set of physical resource blocks used for transmitting the E-PDCCH includes 4 physical resource block pairs, i.e., physical resource block pairs with

indexes

1, 2, 3 and 4, respectively, each physical resource block pair including 8 eregs. The second resource group of the first type is formed by at least two eregs in the same physical resource block pair, and the second resource group of the first type is formed by four eregs in the same physical resource block pair as an example, and the second resource group of the first type may be formed by eregs (0), eregs (1), eregs (2) and eregs (3) in the physical resource block pair with index 1 in table 4, where the corresponding pilot ports are

DMRS ports

7 and 8, or eregs (4), eregs (5), eregs (6) and eregs (7) in the physical resource block pair with index 1, where the corresponding pilot ports are

DMRS ports

9 and 10, which are not listed one by one. The second resource group of the second type is composed of at least two eregs in different physical resource block pairs, and taking the second resource group of the second type is composed of four eregs in different physical resource block pairs as an example, the second resource group of the second type may be composed of eregs (0) in physical resource block pairs with

indexes

1, 2, 3 and 4 in table 2, the corresponding pilot port is DMRS port 7, or may be composed of eregs (2) in physical resource block pairs with indexes 1 and 2 and eregs (3) in physical resource block pairs with

indexes

3 and 4, the corresponding pilot port is

DMRS ports

8 and 7, and so on. As shown in table 4, once the eregs constituting the second resource group of the first type or the second type are determined, the pilot ports corresponding to the second resource group of the first type or the second type are also determined.

Here, the first type second resource group and the second type second resource group may be composed of four first resource groups on the basis of the table 1, as shown in the following table 5. Accordingly, the first type of second resource group and the second type of second resource group may also be composed of two first resource groups on the basis of the table 3, and the specific case is not illustrated.

TABLE 5

As shown in table 5, taking an example that the second resource group of the first type is formed by four eregs in the same physical resource block pair, the second resource group of the first type may be formed by eregs (0), eregs (1), eregs (2) and eregs (3) in the physical resource block pair with index 1 in table 5, the corresponding pilot ports are

DMRS ports

7, 8, 9 and 10, or the corresponding pilot ports are eregs (4), eregs (5), eregs (6) and eregs (7) in the physical resource block pair with index 1, and the corresponding pilot ports are

DMRS ports

9, 7, 10 and 8, or the corresponding pilot ports are eregs (0), eregs (1), eregs (4) and eregs (5) in the physical resource block with index 2, which are not listed any more. The second resource group of the second type is composed of at least two eregs in different physical resource block pairs, and taking the second resource group of the second type is composed of four eregs in different physical resource block pairs as an example, the second resource group of the second type may be composed of eregs (0) in physical resource block pairs with

indexes

3 and 4, the corresponding pilot ports are

DMRS ports

8 and 10, and so on. As shown in table 5, once the eregs constituting the second resource group of the first type or the second type are determined, the pilot ports corresponding to the second resource group of the first type or the second type are also determined.

In addition to the mapping relationships between the first resource group and the pilot port shown in table 1 and table 3, other mapping relationships may be used, for example, the mapping relationships between eREG (0) and eREG (5) correspond to port 7, eREG (1) and eREG (4) correspond to port 10, eREG (2) and eREG (7) correspond to port 8, eREG (3) and eREG (6) correspond to port 10.

In an optional implementation manner of this embodiment, the determining, by the base station according to the mapping relationship between the first resource group and the pilot port and according to the specific relationship, the correspondence between the second resource group of the first type and the first resource group and the pilot port includes: the base station determines that at least two first resource groups corresponding to a second resource group of a first type at least contain two different pilot ports in the mapping relation between the first resource group and the pilot port according to a specific relation, and determines that the pilot port adopted by the transmission of each second resource group of the first type is the pilot port corresponding to the first or last first resource group in at least two first resource groups corresponding to the second resource group of the first type. For example, as shown in table 2, the base station determines that at least two first resource groups corresponding to the second resource group of the first type are two first resource groups, and the port sets corresponding to the two first resource groups in the mapping relationship between the first resource groups and the pilot ports include two different pilot ports, which are respectively DMRS port 7 and DMRS port 9, or respectively DMRS port 8 and DMRS port 10. For another example, as shown in table 4, the base station determines that at least two first resource groups corresponding to the second resource group of the first type are four first resource groups, and the port sets corresponding to the four first resource groups in the mapping relationship between the first resource groups and the pilot ports include four different pilot ports, which are

DMRS ports

7, 8, 9 and 10 respectively. For another example, as shown in table 5, the base station determines that at least two first resource groups corresponding to the second resource group of the first type are four first resource groups, where the port sets corresponding to the four first resource groups in the mapping relationship between the first resource groups and the pilot ports include four different pilot ports, which are

DMRS ports

7, 8, 9 and 10 respectively, or the port sets corresponding to the four first resource groups in the mapping relationship between the first resource groups and the pilot ports include two different pilot ports, which are

DMRS ports

7 and 9 respectively. In summary, the port sets corresponding to at least two first resource groups of the second resource group of the first type comprise at least two different pilot ports. Preferably, for the second resource group of the first type, one of the pilot ports is used at the time of transmission, which is advantageous for saving pilot resources. In order to unify pilot ports used when transmitting E-PDCCH between second resource groups of different first types, it is provided that a pilot port corresponding to a first eREG or a last eREG in at least two corresponding eREGs is selected to be used as transmission.

In an optional implementation manner of this embodiment, in order to improve the utilization ratio of the first resource group, the specific relationship is specifically a pilot port used when transmitting the E-PDCCH according to the second resource group of the second type, a pilot port used for transmitting the E-PDCCH of the first type is determined, and further, according to a mapping relationship between the first resource group and the pilot port, a corresponding relationship between the first resource group of the first type and the first resource group and a corresponding relationship between the second resource of the second type and the first resource group and the pilot port are determined. Based on the above, at least two first resource groups corresponding to the second resource groups of the first type determined by the base station, wherein at least two different pilot ports included in the port set corresponding to the mapping relation between the first resource groups and the pilot ports are at least two pilot ports adopted for transmission in each physical resource block pair when the E-PDCCH is transmitted by the second resource groups of the at least one second type. Wherein, pilot ports used for transmission in each physical resource block pair when the second resource group of the second type transmits the E-PDCCH can be predefined. For example, if the pilot ports used for transmission in each physical resource block pair are

DMRS ports

7 and 9 when the second resource group of the second type transmits the E-PDCCH, at least two first resource groups corresponding to the second resource group of the first type determined by the base station include at least two different pilot ports including a corresponding port set in the mapping relationship between the first resource group and the pilot port, which are

DMRS ports

7 and 9. As shown in table 2, if DMRS ports used for transmission in each physical resource block pair are 7 and 9 when the second resource group of the second type transmits the E-PDCCH, it means that two eregs corresponding to the second resource group of the first type are eregs corresponding to DMRS ports of 7 and 9, which may be eREG (0) and eREG (1) or eREG (4) and eREG (5).

In an optional implementation manner of this embodiment, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, the number of pilot ports adopted for transmission in each physical resource block pair is two, which may be a first pilot port and a second pilot port, or may be a third pilot port and a fourth pilot port. That is, when the E-PDCCH is transmitted by the second resource group of the second type, the number of pilot ports used for intra-transmission per physical resource block pair is not necessarily two, but may be one, three, four, or the like when a certain condition is satisfied. The first pilot port, the second pilot port, the third pilot port and the fourth pilot port are different DMRS ports, and in particular, which DMRS port is not limited. And, the first pilot port, the second pilot port, the third pilot port and the fourth pilot port are all pilot ports mapped to the first resource group in the same physical resource block pair.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of at least one second type of second resource groups for transmitting the E-PDCCH is greater than a preset number threshold, under a condition that the number of pilot ports adopted for intra-transmission in each physical resource block pair is two, the second resource groups of each first type determined by the base station correspond to two first resource groups, and the port sets corresponding to the two first resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports include two different pilot ports, where the two different pilot ports are respectively a first pilot port and a second pilot port, or are respectively a third pilot port and a fourth pilot port. With reference to table 2, assuming that the first pilot port is DMRS port 7, the second pilot port is DMRS port 9, the third pilot port is DMRS port 8, and the fourth pilot port is DMRS port 10, two eregs are corresponding to each first type of second resource group, the pilot ports corresponding to the two eregs are

DMRS ports

7 and 9, or the pilot ports corresponding to the two eregs are

DMRS ports

8 and 10. For each first type second resource group, when the E-PDCCH is actually transmitted, one pilot port in the corresponding port set is preferentially selected for transmission. For example, in table 2, a first type of second resource group is formed by eREG (0) corresponding to DMRS port 7 and eREG (1) corresponding to DMRS port 9, and when the first type of second resource group transmits E-PDCCH, the first eREG of the two eregs corresponding to the first type of second resource group, that is, the pilot port corresponding to eREG (0), that is, DMRS port 7 is transmitted, and when the first type of second resource group transmits E-PDCCH, the precoding manner adopted by eREG (0) and eREG (1) is the same as the precoding manner adopted by DMRS port 7, and both eregs (0) and eREG (1) perform channel estimation based on DMRS port 7. In table 2, the second resource group of the second first type is composed of the eREG (2) corresponding to the DMRS port 8 and the eREG (3) corresponding to the DMRS port 10, when the second resource group of the first type transmits the E-PDCCH, the second resource group of the first type is based on the first eREG of the two eregs corresponding to the second resource group, that is, the pilot port corresponding to the eREG (2), that is, the DMRS port 8, that is, when the second resource group of the first type transmits the E-PDCCH, the precoding mode adopted by the eREG (2) and the eREG (3) is the same as the precoding mode adopted by the DMRS port 8, and both eREG (2) and eREG (3) perform channel estimation based on the DMRS port 8. In table 2, the second resource group of the third first type is composed of the eREG (4) corresponding to the DMRS port 9 and the eREG (5) corresponding to the DMRS port 7, and when the second resource group of the first type transmits the E-PDCCH, the transmission is performed based on the first eREG of the two eregs corresponding to the second resource group, that is, the pilot port corresponding to the eREG (4), that is, the DMRS port 9, that is, when the second resource group of the first type transmits the E-PDCCH, the precoding manner adopted by the eREG (4) and the eREG (5) is the same as the precoding manner adopted by the DMRS port 9, and both eregs (4) and eREG (5) perform channel estimation based on the DMRS port 9. In table 2, the second resource group of the fourth first type is composed of the eregs (6) corresponding to the DMRS port 10 and the eregs (7) corresponding to the DMRS port 8, and when the second resource group of the first type transmits the E-PDCCH, the transmission is performed based on the first eREG of the two eregs corresponding to the second resource group, that is, the pilot port corresponding to the eREG (6), that is, the DMRS port 10, that is, when the second resource group of the first type transmits the E-PDCCH, the precoding manner adopted by the eREG (6) and the eREG (7) is the same as the precoding manner adopted by the DMRS port 10, and both eregs (6) and eregs (7) perform channel estimation based on the DMRS port 10.

Further, each physical resource block pair may include four second resource groups of the first type on the basis that each second resource group of the first type corresponds to two first resource groups. In this case, each physical resource block pair includes 8 first resource groups in total. As shown in tables 1-5. Wherein, two first resource groups corresponding to two second resource groups of a first type contained in a physical resource block pair are two different pilot ports contained in a port set corresponding to the mapping relation between the first resource group and the pilot port, and the two different pilot ports are a first pilot port and a second pilot port; two first resource groups corresponding to two other first type second resource groups contained in the physical resource block pair are the third pilot port and the fourth pilot port, and two different pilot ports contained in the port set corresponding to the mapping relation between the first resource groups and the pilot ports are both the third pilot port and the fourth pilot port. Further, for the second resource groups of the two first types corresponding to the two first resource groups corresponding to the pilot set including the first pilot port and the second pilot port, the order of the two first resource groups ordered by the pilot port within the second resource groups of the two first types is different; similarly, for the two first type second resource groups corresponding to the two first resource groups corresponding to the pilot set including the third pilot port and the fourth pilot port, the order of the two first resource groups ordered by the pilot ports within the two first type second resource groups is different. In combination with table 2, the physical resource block pair with index 1 includes four first type second resource groups, which are respectively first type second resource groups composed of eREG (0) and eREG (1), first type second resource groups composed of eREG (2) and eREG (3), first type second resource groups composed of eREG (4) and eREG (5), and first type second resource groups composed of eREG (6) and eREG (7). Wherein the first type of second resource group formed by eREG (0) and eREG (1) and the first type of second resource group formed by eREG (4) and eREG (5) correspond to the same pilot ports, respectively, and after ordering according to the pilot ports, the order of

DMRS ports

7 and 9 in the two first type of second resource groups is different, for example, in the first type of second resource group formed by eREG (0) and eREG (1), the order of

DMRS ports

7 and 9 is DMRS port 7 and then DMRS port 9, and in the first type of second resource group formed by eREG (4) and eREG (5), the order of

DMRS ports

7 and 9 is DMRS port 9 and then DMRS port 7. The first type of second resource group formed by eREG (2) and eREG (3) and the first type of second resource group formed by eREG (6) and eREG (7) correspond to the same pilot ports,

DMRS ports

8 and 10, respectively, and after ordering according to the pilot ports, the order of

DMRS ports

8 and 10 in the two first type of second resource groups is different, for example, in the first type of second resource group formed by eREG (2) and eREG (3), the order of

DMRS ports

8 and 10 is DMRS port 8 followed by DMRS port 10, and in the first type of second resource group formed by eREG (6) and eREG (7), the order of

DMRS ports

8 and 10 is DMRS port 10 followed by DMRS port 8.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of at least one second type of second resource groups for transmitting the E-PDCCH is greater than a preset number threshold, under a condition that the number of pilot ports adopted for intra-transmission in each physical resource block pair is two, the second resource group of each first type determined by the base station corresponds to four first resource groups, and the port set corresponding to the four first resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports includes four different pilot ports, where the four different pilot ports are respectively a first pilot port, a second pilot port, a third pilot port and a fourth pilot port. With reference to table 5, assuming that the first pilot port is DMRS port 7, the second pilot port is DMRS port 9, the third pilot port is DMRS port 8, and the fourth pilot port is DMRS port 10, each first type of second resource group corresponds to four eregs, and the pilot ports corresponding to the four eregs are

DMRS ports

7, 8, 9, and 10. For each first type second resource group, when the E-PDCCH is actually transmitted, one pilot port in the corresponding port set is preferentially selected for transmission. For example, in table 5, a first type of second resource group is formed by eREG (0) corresponding to DMRS port 7, eREG (1) corresponding to DMRS port 9, eREG (2) corresponding to DMRS port 8, and eREG (3) corresponding to DMRS port 10, and when the first type of second resource group transmits E-PDCCH, the first eREG of four eregs corresponding to the first type of second resource group, that is, the pilot port corresponding to eREG (0), that is, DMRS port 7 is transmitted, and when the first type of second resource group transmits E-PDCCH, the precoding scheme adopted by eREG (0), eREG (1), eREG (2), and eREG (3) is the same as the precoding scheme adopted by DMRS port 7, and all of these four eregs (0), eREG (1), eREG (2), and eREG (3) perform channel estimation based on DMRS port 7. In table 5, the eREG (4) corresponding to the DMRS port 9, the eREG (5) corresponding to the DMRS port 7, the eREG (6) corresponding to the DMRS port 10, and the eREG (7) corresponding to the DMRS port 8 constitute a second resource group of a second first type, and when the first type of second resource group transmits the E-PDCCH, the eREG (4) corresponding to the pilot port, that is, the DMRS port 9, is transmitted based on the first eREG of the four eregs corresponding to the second resource group, that is, when the first type of second resource group transmits the E-PDCCH, the eREG (4), eREG (5), eREG (6), and eREG (7) use the same precoding scheme as the DMRS port 9, and all the four eregs (4), eREG (5), eREG (6), and eREG (7) perform channel estimation based on the DMRS port 9.

On the basis that each first type of second resource group corresponds to four first resource groups, each physical resource block pair comprises two first type of second resource groups. In this case, each physical resource block pair contains eight first resource groups in total. The four first resource groups corresponding to the two second resource groups of the first type contained in the physical resource block pair are the first pilot port, the second pilot port, the third pilot port and the fourth pilot port, and the four first resource groups ordered according to the pilot ports in the two second resource groups of the first type contained in the physical resource block pair are different in sequence. The pilot ports in the two first type of second resource groups included in the physical resource block pair may be ordered in any different manner, for example: the pilot ports in the second resource group of one first type contained in the physical resource block pair are ordered as a first pilot port, a second pilot port, a third pilot port and a fourth pilot port, and the pilot ports in the second resource group of another first type contained in the physical resource block pair are ordered as a second pilot port, a first pilot port, a fourth pilot port and a third pilot port. Or the sequence of the pilot ports in the second resource group of one first type contained in the physical resource block pair is a first pilot port, a second pilot port, a third pilot port and a fourth pilot port, and the sequence of the pilot ports in the second resource group of the other first type contained in the physical resource block pair is a fourth pilot port, a third pilot port, a second pilot port and a first pilot port. Or the sequence of the pilot ports in the second resource group of one first type contained in the physical resource block pair is a first pilot port, a third pilot port, a second pilot port and a fourth pilot port, and the sequence of the pilot ports in the second resource group of the other first type contained in the physical resource block pair is a third pilot port, a first pilot port, a fourth pilot port and a second pilot port.

In conjunction with table 5, the physical resource block pair with index 1 includes two second resource groups of the first type, which are respectively a second resource group of the first type composed of eREG (0), eREG (1), eREG (2) and eREG (3), and a second resource group of the first type composed of eREG (4), eREG (5), eREG (6) and eREG (7). The second resource group of the first type formed by eREG (0), eREG (1), eREG (2) and eREG (3) and the second resource group of the first type formed by eREG (4), eREG (5), eREG (6) and eREG (7) correspond to the same pilot ports, namely

DMRS ports

7, 8, 9 and 10 respectively, and after being ordered according to the pilot ports, the order of the

DMRS ports

7, 8, 9 and 10 in the two second resource groups of the first type is different. For example, in the second resource group of the first type composed of eREG (0), eREG (1), eREG (2), and eREG (3), the order of

DMRS ports

7, 8, 9, and 10 is DMRS port 7, DMRS port 9, DMRS port 8, and DMRS port 10 in this order, and in the second resource group of the first type composed of eREG (4), eREG (5), eREG (6), and eREG (7), the order of

DMRS ports

7, 8, 9, and 10 is DMRS port 9, DMRS port 7, DMRS port 10, and DMRS port 8 in this order. In addition to this, in the second resource group of the first type composed of eREG (0), eREG (1), eREG (2) and eREG (3), the order of

DMRS ports

7, 8, 9 and 10 may be DMRS port 7, DMRS port 8, DMRS port 9 and DMRS port 10, in the second resource group of the first type composed of eREG (4), eREG (5), eREG (6) and eREG (7), the order of

DMRS ports

7, 8, 9 and 10 may be DMRS port 10, DMRS port 9, DMRS port 8 and DMRS port 7, and so on.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-transmission in each physical resource block pair is two, the second resource groups of the first type determined by the base station correspond to four first resource groups, the port sets corresponding to the four first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports include two different pilot ports, where the two different pilot ports are respectively a first pilot port and a second pilot port, or are a third pilot port and a fourth pilot port. In combination with table 4, assuming that the first pilot port is DMRS port 7, the second pilot port is DMRS port 8, the third pilot port is DMRS port 9, and the fourth pilot port is DMRS port 10, each first type of second resource group corresponds to four eregs, and the pilot ports corresponding to the four eregs are

DMRS ports

7 and 8, or

DMRS ports

9 and 10. For each first type second resource group, when the E-PDCCH is actually transmitted, one pilot port in the corresponding port set is preferentially selected for transmission. For example, in table 4, a first type of second resource group is formed by eREG (0) corresponding to DMRS port 7, eREG (1) corresponding to DMRS port 8, eREG (2) corresponding to DMRS port 8, and eREG (3) corresponding to DMRS port 7, and when the first type of second resource group transmits E-PDCCH, the first eREG of four eregs corresponding to the first type of second resource group, that is, the pilot port corresponding to eREG (0), that is, DMRS port 7 is transmitted, and when the first type of second resource group transmits E-PDCCH, the precoding scheme adopted by eREG (0), eREG (1), eREG (2), and eREG (3) is the same as the precoding scheme adopted by DMRS port 7, and all of these four eregs (0), eREG (1), eREG (2), and eREG (3) perform channel estimation based on DMRS port 7. In table 4, the second resource group of the second first type is composed of the eREG (4) corresponding to the DMRS port 9, the eREG (5) corresponding to the DMRS port 10, the eREG (6) corresponding to the DMRS port 10, and the eREG (7) corresponding to the DMRS port 9, and when the first type of second resource group transmits the E-PDCCH, the eREG (4) corresponding to the pilot port, that is, the DMRS port 9, is transmitted based on the first eREG of the four eregs corresponding to the second resource group, that is, when the first type of second resource group transmits the E-PDCCH, the eREG (4), eREG (5), eREG (6), and eREG (7) use the same precoding scheme as the DMRS port 9, and all the four eregs (4), eREG (5), eREG (6), and eREG (7) perform channel estimation based on the DMRS port 9.

On the basis that each first type of second resource group corresponds to four first resource groups, each physical resource block pair comprises two first type of second resource groups. In this case, each physical resource block pair contains eight first resource groups in total. The four first resource groups corresponding to the second resource groups of one first type contained in the physical resource block pair are the first pilot port and the second pilot port, the two different pilot ports contained in the port set corresponding to the mapping relation between the first resource groups and the pilot ports are the third pilot port and the fourth pilot port, and the four first resource groups corresponding to the second resource groups of another first type contained in the physical resource block pair are the two different pilot ports contained in the port set corresponding to the mapping relation between the first resource groups and the pilot ports. In conjunction with table 4, the physical resource block pair with index 1 includes two second resource groups of the first type, which are respectively a second resource group of the first type composed of eREG (0), eREG (1), eREG (2) and eREG (3), and a second resource group of the first type composed of eREG (4), eREG (5), eREG (6) and eREG (7). Wherein the second resource group of the first type composed of eREG (0), eREG (1), eREG (2) and eREG (3) and the second resource group of the first type composed of eREG (4), eREG (5), eREG (6) and eREG (7) correspond to different pilot ports. For example, pilot ports corresponding to the second resource group of the first type composed of eREG (0), eREG (1), eREG (2) and eREG (3) are

DMRS ports

7 and 8, and pilot ports corresponding to the second resource group of the first type composed of eREG (4), eREG (5), eREG (6) and eREG (7) are

DMRS ports

9 and 10.

Based on the above embodiments or implementations, the at least two first resource groups corresponding to the second resource groups of each second type determined by the base station to transmit the E-PDCCH are first resource groups that are located in different physical resource block pairs and correspond to the same pilot port and have the same position index. For example, the second resource group of the second type, as surrounded by the solid line box in table 2, is a resource group consisting of two eregs with position indexes of 0 for the DMRS port 7 in two physical resource block pairs with

indexes

3 and 4. For another example, the second resource group of the second type, as surrounded by the solid line boxes in tables 4 and 5, is a resource group consisting of four eregs having indices of 0 for each of the four physical resource block pairs having indices of 1, 2, 3, and 4, corresponding to the location index of DMRS port 7.

Based on the above embodiments or implementations, the at least two first resource groups corresponding to the second resource groups of each second type determined by the base station to transmit the E-PDCCH are first resource groups located in different physical resource block pairs and corresponding to the same pilot port and having different location indexes. For example, the second resource group of the second type, as surrounded by two dashed boxes connected by a solid line in table 2, is a resource group consisting of two eregs with position indexes 1 and 4 respectively for the DMRS port 9 in two physical resource block pairs with

indexes

3 and 4. For another example, the second resource group of the second type, as surrounded by two dashed boxes connected by a solid line in table 4, is a resource group consisting of four eregs with location indexes of 2 and 3 corresponding to

DMRS ports

8 and 7, respectively, among four physical resource block pairs with indexes of 1, 2, 3, and 4. For another example, in combination with table 4, the second resource group of the second type may also be configured by an eREG corresponding to DMRS port 7 position index of 0 in the physical resource block pair with index 1, an eREG corresponding to DMRS port 8 position index of 1 in the physical resource block pair with index 2, an eREG corresponding to DMRS port 8 position index of 2 in the physical resource block pair with index 3, and an eREG corresponding to DMRS port 7 position index of 3 in the physical resource block pair with index 4. For another example, in combination with table 4, the second resource group of the second type may also be configured by an eREG corresponding to DMRS port 7 position index of 0 in the physical resource block pair with index 1, an eREG corresponding to DMRS port 8 position index of 1 in the physical resource block pair with index 2, an eREG corresponding to DMRS port 9 position index of 4 in the physical resource block pair with index 3, and an eREG corresponding to DMRS port 10 position index of 5 in the physical resource block pair with index 4.

In an optional implementation manner of this embodiment, based on implementation of the second resource groups of the first type in the foregoing embodiments, the at least two first resource groups corresponding to the second resource groups of each second type determined by the base station to transmit the E-PDCCH are first resource groups with the same position indexes as the position indexes of the at least two first resource groups corresponding to the second resource groups of the first type in different physical resource block pairs. For example, a second resource group of the second type, as surrounded by two dashed boxes connected by a dashed line in table 2, is composed of a first resource group with a position index of 6 corresponding to DMRS port 10 in a physical resource block pair with an index of 2 and a first resource group with a position index of 7 corresponding to DMRS port 8 in a physical resource block pair with an index of 4, and corresponds to a second resource group of the first type, as composed of two first resource groups with position indexes of 6 and 7 in a physical resource block pair with an index of 1 in table 2, and the position indexes of the first resource groups corresponding to the two second resource groups are the same. For another example, in combination with table 5, if the second resource group of the first type is composed of four first resource groups having physical resource block centering position indexes of 0, 1, 2, and 3 with an index of 1, the base station can determine that the second resource group of the second type is composed of a first resource group having physical resource block centering position index of 0 with an index of 1, a first resource group having physical resource block centering position index of 1 with an index of 2, a first resource group having physical resource block centering position index of 2 with an index of 3, and a first resource group having physical resource block centering position index of 3 with an index of 4 based thereon; in addition, the base station may determine that the second resource group of the second type is configured by a first resource group with a physical resource block centering position index of 0 and an index of 4, a first resource group with a physical resource block centering position index of 1 and an index of 3, a first resource group with a physical resource block centering position index of 2 and an index of 2, and a first resource group with a physical resource block centering position index of 3 and the like.

The advantageous effects produced by the above embodiments are described below. For further acquisition of spatial diversity in the same physical resource block pair, it is common practice to implement by allocating multiple pilot ports. However, if the pilot port allocation is not proper, the pilot port resource is wasted and the channel estimation is not facilitated. For example, table 6 shows still another mapping relationship between the first resource group and the DMRS port.

TABLE 6

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As shown in table 6, if DMRS port 7 and DMRS port 9 are allocated to pilot ports used for transmission of E-PDCCH per physical resource block pair when the second resource group of the second type is transmitted, and two second resource groups of the second type for transmitting E-PDCCH are shown as solid line boxes in table 6, at this time, only the first resource group that can be used for constituting the second resource group of the first type for the physical resource block pair with index 1 is shown as a dashed line box in table 6, wherein eREG (1) and eREG (5) cannot be used, resulting in waste. In the embodiments or implementations of the present invention, the mapping relationship between the first resource group and the pilot port is set, and then the first type of second resource group, the second type of second resource group, the corresponding pilot port, and the like are determined according to the first resource group, the pilot port, and the specific relationship.

Fig. 1B is a flowchart of a method for receiving an E-PDCCH according to an embodiment of the present invention. The execution subject of the present embodiment is UE, but is not limited thereto. As shown in fig. 1B, the method of the present embodiment includes:

step 201, determining a corresponding relation between a second resource group of a first type and the first resource group and the pilot port and a corresponding relation between the second resource group of a second type and the first resource group and the pilot port according to a mapping relation between the first resource group and the pilot port according to a specific relation.

The mapping relation between the first resource group and the pilot frequency port comprises the mapping relation between at least one first resource group and at least one pilot frequency port in one physical resource unit set; the first resource group is eREG or REG, the second resource group of the first type is eCCE or control channel candidate, the second resource group of the second type is eCCE or control channel candidate, and the physical resource unit set is at least one physical resource block pair; the second resource group of the first type corresponds to at least two first resource groups, and the second resource group of the second type corresponds to at least two first resource groups. The specific relationship is satisfied between the corresponding relationship between the second resource group of different types and the first resource group and the pilot port.

Step 202, determining at least one first type of second resource group or second type of second resource group for transmitting the E-PDCCH, and receiving the at least one first type of second resource group or second type of second resource group for transmitting the E-PDCCH on the at least one first resource group and pilot port according to the determined correspondence between the first type or second type of second resource group and the first resource group and pilot port.

In this embodiment, step 201 may be described with reference to step 101, and step 202 may be described with reference to step 102, which is different from step 102 in that: in this embodiment, instead of mapping at least one of the first type of second resource group or the second type of second resource group of the transmission E-PDCCH to at least one of the first resource group and the pilot port for transmission as in step 102, the UE receives the at least one of the first type of second resource group or the second type of second resource group of the transmission E-PDCCH on the at least one of the first resource group and the pilot port. The process of receiving at least one first type of second resource group or second type of second resource group of the E-PDCCH on at least one first resource group and pilot port by the UE is a blind detection process, and the blind detection process in this embodiment is similar to the blind detection process in the prior art, and is not described herein again.

In this embodiment, the second resource group includes two types, a second resource group of the first type and a second resource group of the second type. Optionally, the second resource group of the first type is a resource group when the E-PDCCH is transmitted in a centralized manner, and the second resource group of the second type is a resource group when the E-PDCCH is transmitted in a discrete manner. Herein, centralized transmission means that the resource allocation for transmitting the E-PDCCH is concentrated in one or several consecutive pairs of physical resource blocks, and discrete transmission means that the resource allocation for transmitting the E-PDCCH is dispersed in a plurality of discrete pairs of physical resource blocks.

An example of an alternative mapping relationship between the first resource group and the pilot port is shown in table 1 and table 3, but is not limited thereto.

In an optional implementation manner of this embodiment, determining, by the UE, a correspondence between the first resource group and the pilot port and the second resource group of the first type according to a specific relationship according to a mapping relationship between the first resource group and the pilot port includes: according to the mapping relation between the first resource group and the pilot frequency port, the UE determines that at least two first resource groups corresponding to the second resource group of the first type at least contain two different pilot frequency ports in the port set corresponding to the mapping relation between the first resource group and the pilot frequency port according to the specific relation, and determines that the pilot frequency port adopted by the transmission of each second resource group of the first type is the pilot frequency port corresponding to the first or last first resource group in at least two first resource groups corresponding to the second resource group of the first type.

In an optional implementation manner of this embodiment, in order to improve the utilization ratio of the first resource group, the specific relationship is specifically a pilot port used when transmitting the E-PDCCH according to the second resource group of the second type, a pilot port used for transmitting the E-PDCCH of the first type is determined, and further, according to a mapping relationship between the first resource group and the pilot port, a corresponding relationship between the first resource group of the first type and the first resource group and a corresponding relationship between the second resource of the second type and the first resource group and the pilot port are determined. Based on the above, at least two first resource groups corresponding to the second resource groups of the first type determined by the UE at least include two different pilot ports in the port set corresponding to the mapping relationship between the first resource groups and the pilot ports, where the at least two different pilot ports are at least two pilot ports adopted for transmission in each physical resource block pair when the E-PDCCH is transmitted by the second resource groups of the at least one second type. Wherein, pilot ports used for transmission in each physical resource block pair when the second resource group of the second type transmits the E-PDCCH can be predefined.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of at least one second type of second resource groups for transmitting the E-PDCCH is greater than a preset number threshold, under a condition that the number of pilot ports adopted for intra-transmission in each physical resource block pair is two, the second resource group of each first type determined by the UE corresponds to two first resource groups, and the port set corresponding to the two first resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports includes two different pilot ports, where the two different pilot ports are respectively a first pilot port and a second pilot port, or are respectively a third pilot port and a fourth pilot port.

Further, each physical resource block pair may include four second resource groups of the first type on the basis that each second resource group of the first type corresponds to two first resource groups. In this case, each physical resource block pair includes 8 first resource groups in total. As shown in tables 1-5. Wherein, two first resource groups corresponding to two second resource groups of a first type contained in a physical resource block pair are two different pilot ports contained in a port set corresponding to the mapping relation between the first resource group and the pilot port, and the two different pilot ports are a first pilot port and a second pilot port; two first resource groups corresponding to two other first type second resource groups contained in the physical resource block pair are the third pilot port and the fourth pilot port, and two different pilot ports contained in the port set corresponding to the mapping relation between the first resource groups and the pilot ports are both the third pilot port and the fourth pilot port. Further, for the second resource groups of the two first types corresponding to the two first resource groups corresponding to the pilot set including the first pilot port and the second pilot port, the order of the two first resource groups ordered by the pilot port within the second resource groups of the two first types is different; similarly, for the two first type second resource groups corresponding to the two first resource groups corresponding to the pilot set including the third pilot port and the fourth pilot port, the order of the two first resource groups ordered by the pilot ports within the two first type second resource groups is different.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-transmission in each physical resource block pair is two, the second resource groups of the first type determined by the UE correspond to four first resource groups, and the port sets corresponding to the four first resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports include four different pilot ports, where the four different pilot ports are respectively a first pilot port, a second pilot port, a third pilot port, and a fourth pilot port.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-transmission in each physical resource block pair is two, the second resource groups of the first type determined by the UE correspond to four first resource groups, and the port sets corresponding to the four first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports include two different pilot ports, where the two different pilot ports are respectively a first pilot port and a second pilot port, or are a third pilot port and a fourth pilot port.

On the basis that each first type of second resource group corresponds to four first resource groups, each physical resource block pair comprises two first type of second resource groups. In this case, each physical resource block pair contains eight first resource groups in total. The four first resource groups corresponding to the second resource groups of one first type contained in the physical resource block pair are the first pilot port and the second pilot port, the two different pilot ports contained in the port set corresponding to the mapping relation between the first resource groups and the pilot ports are the third pilot port and the fourth pilot port, and the four first resource groups corresponding to the second resource groups of another first type contained in the physical resource block pair are the two different pilot ports contained in the port set corresponding to the mapping relation between the first resource groups and the pilot ports.

Based on the above embodiments or implementations, the at least two first resource groups corresponding to the second resource groups of each second type determined by the UE to transmit the E-PDCCH are first resource groups that are located in different physical resource block pairs and correspond to the same pilot port and have the same position index.

Based on the above embodiments or implementations, the at least two first resource groups corresponding to the second resource groups of each second type determined by the UE to transmit the E-PDCCH are first resource groups located in different physical resource block pairs corresponding to the same pilot port and having different location indexes.

In an optional implementation manner of this embodiment, based on implementation of the second resource groups of the first type in the foregoing embodiments, the at least two first resource groups corresponding to the second resource groups of each second type determined by the UE to transmit the E-PDCCH are first resource groups with the same position indexes as the position indexes of the at least two first resource groups corresponding to the second resource groups of the first type in different physical resource block pairs.

The above detailed descriptions of the alternative embodiments may be referred to the corresponding descriptions in the embodiment shown in fig. 1A, and are not repeated herein.

In another alternative embodiment of the present embodiment, the UE needs to obtain the mapping relationship between the first resource group and the pilot port in advance before using the mapping relationship between the first resource group and the pilot port. The method for obtaining the mapping relation between the first resource group and the pilot port by the UE comprises the following steps: the UE and the base station define the mapping relation between the first resource group and the pilot frequency port in advance. Or, the UE and the base station are agreed in advance, and the mapping relation between the first resource group and the pilot port is generated according to the local cell ID. In both cases, the base station does not need to send the mapping relationship between the first resource group and the pilot port to the UE, but the UE may directly acquire the mapping relationship between the first resource group and the pilot port. Another way is: the UE receives a high-layer signaling sent by the base station, the high-layer signaling comprises the mapping relation between the first resource group and the pilot frequency port, and the UE acquires the mapping relation between the first resource group and the pilot frequency port from the high-layer signaling.

The E-PDCCH receiving method provided by the embodiment corresponds to the E-PDCCH transmission method provided by the embodiment, and the UE can successfully receive the E-PDCCH, so that the problem of E-PDCCH transmission is solved.

Fig. 2A is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in fig. 2A, the base station of the present embodiment includes: a first determination unit 21, a second determination unit 22, and a map transmission unit 23.

The first determining unit 21 is configured to determine, according to a mapping relationship between the first resource group and the pilot port, a correspondence relationship between the second resource group of the first type and the first resource group and the pilot port, and a correspondence relationship between the second resource group of the second type and the first resource group and the pilot port according to a specific relationship.

The mapping relationship between the first resource group and the pilot port includes the mapping relationship between at least one first resource group and at least one pilot port in one physical resource unit set. The first resource group is eREG or REG, the second resource group of the first type is eCCE or control channel candidate, and the second resource group of the second type is eCCE or control channel candidate. The set of physical resource units is at least one physical resource block pair. The second resource group of the first type corresponds to at least two first resource groups, and the second resource group of the second type corresponds to at least two first resource groups. The specific relationship is satisfied between the corresponding relationship between the second resource group of different types and the first resource group and the pilot port.

A second determining unit 22, configured to determine at least one second resource group of the first type or a second resource group of the second type for transmitting the E-PDCCH.

And a mapping transmission unit 23, connected to the first determination unit 21 and the second determination unit 22, configured to map the second resource group of the first type or the second resource group of the second type determined by the second determination unit 22 to at least one first resource group and pilot port for transmission according to the correspondence between the first resource group and the pilot port and the second resource group of the first type or the second type determined by the first determination unit 21.

In an alternative implementation manner of this embodiment, the second resource group of the first type is a resource group when the E-PDCCH is transmitted in a centralized manner; the second resource group of the second type is a resource group when the E-PDCCH is transmitted in a discrete manner.

In an optional implementation manner of this embodiment, the first determining unit 21 determines, according to a specific relationship, a correspondence between the first resource group and the pilot port and between the second resource group of the first type and the first resource group according to a mapping relationship between the first resource group and the pilot port, where the determining includes: the first determining unit 21 is specifically configured to determine, according to a mapping relationship between the first resource group and the pilot port, that at least two first resource groups corresponding to the second resource group of the first type include at least two different pilot ports in a port set corresponding to the mapping relationship between the first resource group and the pilot port, and determine that a pilot port adopted for transmission of each second resource group of the first type is a pilot port corresponding to a first or last first resource group of at least two first resource groups corresponding to the second resource group of the first type.

In an optional implementation manner of this embodiment, the determining, by the first determining unit 21, that at least two first resource groups corresponding to the second resource groups of the first type include at least two different pilot ports in a port set corresponding to the mapping relationship between the first resource groups and the pilot ports includes: the first determining unit 21 is more specifically configured to determine that at least two first resource groups corresponding to the second resource groups of the first type include at least two different pilot ports in the port set corresponding to the mapping relationship between the first resource groups and the pilot ports, where the at least two different pilot ports are at least two pilot ports adopted for transmission in each physical resource block pair when the E-PDCCH is transmitted by the second resource groups of the at least one second type.

In an optional implementation manner of this embodiment, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than a preset number threshold, two pilot ports are adopted for transmission in each physical resource block pair, and the two pilot ports are respectively transmitted by the first pilot port and the second pilot port, or are respectively transmitted by the third pilot port and the fourth pilot port.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-pair transmission of each physical resource block is two, and the pilot ports are respectively the first pilot port and the second pilot port, or are respectively the third pilot port and the fourth pilot port, the first determining unit 21 is specifically configured to determine that each second resource group of the first type corresponds to two first resource groups, and determine that the port sets corresponding to the two first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports include two different pilot ports, where the two different pilot ports are respectively the first pilot port and the second pilot port, or are respectively the third pilot port and the fourth pilot port.

Based on the above, four second resource groups of the first type are contained in each physical resource block pair, in this case, 8 first resource groups are contained in each physical resource block pair in total. Wherein, two first resource groups corresponding to two second resource groups of a first type included in a physical resource block pair are a first pilot port and a second pilot port in two different pilot ports included in a port set corresponding to a mapping relation between the first resource groups and the pilot ports, and two first resource groups corresponding to two other second resource groups of a second type included in a physical resource block pair are a third pilot port and a fourth pilot port in two different pilot ports included in a port set corresponding to a mapping relation between the first resource groups and the pilot ports.

The physical resource block pairs comprise four first type second resource groups, and the sequences of the two first resource groups which are sequenced according to the pilot ports in the two first type second resource groups are different for the two first type second resource groups which correspond to the two first resource groups corresponding to the pilot sets comprising the first pilot ports and the second pilot ports; for the two first type second resource groups corresponding to the two first resource groups corresponding to the pilot set including the third pilot port and the fourth pilot port, the order of the two first resource groups ordered by the pilot ports within the two first type second resource groups is different.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-pair transmission of each physical resource block is two, that is, the first pilot port and the second pilot port are respectively transmitted, or that the second pilot port and the fourth pilot port are respectively transmitted, the first determining unit 21 is specifically configured to determine that each second resource group of the first type corresponds to four first resource groups, and that the port set corresponding to the four first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports includes four different pilot ports, where the four different pilot ports are respectively a first pilot port, a second pilot port, a third pilot port and a fourth pilot port.

Based on the above, two second resource groups of the first type are contained in each physical resource block pair, in which case a total of 8 first resource groups are contained in each physical resource block pair. The four first resource groups corresponding to the two second resource groups of the first type contained in the physical resource block pair are the first pilot port, the second pilot port, the third pilot port and the fourth pilot port, and the four first resource groups ordered according to the pilot ports in the two second resource groups of the first type contained in the physical resource block pair are different in sequence.

The pilot port ordering within the second resource group of the two first types contained in the physical resource block pair includes, but is not limited to: the pilot ports in the second resource group of one first type contained in the physical resource block pair are ordered as a first pilot port, a second pilot port, a third pilot port and a fourth pilot port, and the pilot ports in the second resource group of another first type contained in the physical resource block pair are ordered as a second pilot port, a first pilot port, a fourth pilot port and a third pilot port. Or alternatively

The order of pilot ports in the second resource group of one first type contained in the physical resource block pair is a first pilot port, a second pilot port, a third pilot port and a fourth pilot port, and the order of pilot ports in the second resource group of another first type contained in the physical resource block pair is a fourth pilot port, a third pilot port, a second pilot port and a first pilot port. Or alternatively

The pilot ports in the second resource group of one first type contained in the physical resource block pair are ordered as a first pilot port, a third pilot port, a second pilot port and a fourth pilot port, and the pilot ports in the second resource group of another first type contained in the physical resource block pair are ordered as a third pilot port, a first pilot port, a fourth pilot port and a second pilot port.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-pair transmission of each physical resource block is two, and the pilot ports are respectively the first pilot port and the second pilot port, or the third pilot port and the fourth pilot port, the first determining unit 21 is specifically configured to determine that each second resource group of the first type corresponds to four first resource groups, and that the port set corresponding to the four first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports includes two different pilot ports, where the two different pilot ports are respectively the first pilot port and the second pilot port, or are respectively the third pilot port and the fourth pilot port.

Based on the above, two second resource groups of the first type are contained in each physical resource block pair, in which case a total of 8 first resource groups are contained in each physical resource block pair. The four first resource groups corresponding to the second resource groups of one first type contained in the physical resource block pair are the first pilot port and the second pilot port, the two different pilot ports contained in the port set corresponding to the mapping relation between the first resource groups and the pilot ports are the third pilot port and the fourth pilot port, and the four first resource groups corresponding to the second resource groups of another first type contained in the physical resource block pair are the two different pilot ports contained in the port set corresponding to the mapping relation between the first resource groups and the pilot ports.

In an optional implementation manner of this embodiment, the second determining unit 22 is specifically configured to determine that at least two first resource groups corresponding to the second resource groups of each second type of transmitting E-PDCCH are first resource groups that are located in different physical resource block pairs and correspond to the same pilot port and have the same location index.

In an optional implementation manner of this embodiment, the second determining unit 22 is specifically configured to determine that at least two first resource groups corresponding to the second resource groups of each of the second types of transmitting E-PDCCH are first resource groups that are located in different physical resource block pairs and correspond to the same pilot port and have different location indexes.

In an optional implementation manner of this embodiment, based on the implementation of the second resource groups of the first type, the second determining unit 22 is specifically configured to determine that at least two first resource groups corresponding to the second resource groups of each second type for transmitting the E-PDCCH are first resource groups with the same location indexes as at least two first resource groups corresponding to the second resource groups of the first type, where location indexes are located in different physical resource block pairs.

In an optional implementation manner of this embodiment, the first pilot port is a DMRS port 7, the second pilot port is a DMRS port 9, the third pilot port is a DMRS port 8, and the fourth pilot port is a DMRS port 10. Or, the first pilot port is a DMRS port 8, the second pilot port is a DMRS port 10, the third pilot port is a DMRS port 7, and the fourth pilot port is a DMRS port 9. Or, the first pilot port is a DMRS port 7, the second pilot port is a DMRS port 8, the third pilot port is a DMRS port 9, and the fourth pilot port is a DMRS port 10. Or, the first pilot port is a DMRS port 9, the second pilot port is a DMRS port 10, the third pilot port is a DMRS port 7, and the fourth pilot port is a DMRS port 8.

In an optional implementation manner of this embodiment, the base station of this embodiment further includes: a first acquisition unit 24. A first obtaining unit 24, configured to define a mapping relationship between the first resource group and the pilot port in advance before the first determining unit 21 uses the mapping relationship between the first resource group and the pilot port; or, the first obtaining unit 24 is configured to generate, before the first determining unit 21 uses the mapping relationship between the first resource group and the pilot port, the mapping relationship between the first resource group and the pilot port according to the local cell identifier.

In an optional implementation manner of this embodiment, the base station of this embodiment further includes: a first transmitting unit 25. A first sending unit 25, configured to send higher layer signaling, where the higher layer signaling includes a mapping relationship between the first resource group and the pilot port. The first sending unit 25 is mainly configured to provide the UE with a mapping relationship between the first resource group and the pilot port. Alternatively, the first transmitting unit 25 is connected to the first determining unit 21 and the first acquiring unit 24.

Each functional unit of the E-PDCCH transmitting base station provided in this embodiment may be used to execute the procedure of the E-PDCCH transmitting method described above, and the specific working principle thereof is not described in detail herein, and details of the method embodiment will be described in detail.

According to the mapping relation between the first resource group and the pilot port, the E-PDCCH transmission base station determines the corresponding relation between the first type second resource group and the second type second resource group and the first resource group and the pilot port respectively according to the specific relation, then determines at least one first type second resource group or at least one second type second resource group for transmitting the E-PDCCH, and maps the first type or second type second resource group for transmitting the E-PDCCH to at least one first resource group and the pilot port according to the corresponding relation between the first type or second type second resource group and the first resource group and the pilot port. Furthermore, the E-PDCCH transmission base station of the embodiment can also improve the utilization rate of the pilot frequency port and realize space diversity.

Fig. 2B is a schematic structural diagram of a UE according to an embodiment of the present invention. As shown in fig. 2B, the UE of the present embodiment includes: a third determination unit 26, a fourth determination unit 27 and a first receiving unit 28.

The third determining unit 26 is configured to determine, according to the mapping relationship between the first resource group and the pilot port, a correspondence between the second resource group of the first type and the first resource group and the pilot port, and a correspondence between the second resource group of the second type and the first resource group and the pilot port according to a specific relationship.

A fourth determining unit 27, configured to determine at least one second resource group of the first type or a second resource group of the second type for transmitting the E-PDCCH.

The first receiving unit 28 is connected to the third determining unit 26 and the fourth determining unit 27, and is configured to receive, on at least one first resource group and pilot port, at least one first resource group of the first type or a second resource group of the second type determined by the fourth determining unit 27 according to the correspondence between the first resource group and the pilot port of the first type or the second resource group of the second type determined by the third determining unit 26.

In an optional implementation manner of this embodiment, the third determining unit 26 determines, according to a specific relationship, a correspondence between the first resource group and the pilot port and between the second resource group of the first type and the first resource group according to a mapping relationship between the first resource group and the pilot port, where the determining includes: the third determining unit 26 is specifically configured to determine, according to a mapping relationship between the first resource group and the pilot port, that at least two first resource groups corresponding to the second resource group of the first type include at least two different pilot ports in the port set corresponding to the mapping relationship between the first resource group and the pilot port, and determine that the pilot port adopted for transmission of each second resource group of the first type is a pilot port corresponding to a first or last first resource group of at least two first resource groups corresponding to the second resource group of the first type.

In an optional implementation manner of this embodiment, the determining, by the third determining unit 26, that at least two first resource groups corresponding to the second resource groups of the first type include at least two different pilot ports in a port set corresponding to the mapping relationship between the first resource groups and the pilot ports includes: the third determining unit 26 is more specifically configured to determine that at least two first resource groups corresponding to the second resource groups of the first type include at least two different pilot ports in the port set corresponding to the mapping relationship between the first resource groups and the pilot ports, where the at least two different pilot ports are at least two pilot ports used for transmission in each physical resource block pair when the E-PDCCH is transmitted by the at least one second resource group of the second type.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-transmission in each physical resource block pair is two, and the pilot ports are respectively the first pilot port and the second pilot port, or the third pilot port and the fourth pilot port, the third determining unit 26 is specifically configured to determine that each second resource group of the first type corresponds to two first resource groups, and determine that the port sets corresponding to the two first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports include two different pilot ports, where the two different pilot ports are respectively the first pilot port and the second pilot port, or are respectively the third pilot port and the fourth pilot port.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-pair transmission of each physical resource block is two, that is, the first pilot port and the second pilot port are respectively transmitted, or that the second pilot port and the fourth pilot port are respectively transmitted, the third determining unit 26 is specifically configured to determine that each second resource group of the first type corresponds to four first resource groups, and that the port set corresponding to the four first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports includes four different pilot ports, where the four different pilot ports are respectively the first pilot port, the second pilot port, the third pilot port and the fourth pilot port.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-pair transmission of each physical resource block is two, and the pilot ports are respectively the first pilot port and the second pilot port, or the third pilot port and the fourth pilot port, the third determining unit 26 is specifically configured to determine that each second resource group of the first type corresponds to four first resource groups, and that the port set corresponding to the four first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports includes two different pilot ports, where the two different pilot ports are respectively the first pilot port and the second pilot port, or are respectively the third pilot port and the fourth pilot port.

In an optional implementation manner of this embodiment, the fourth determining unit 27 is specifically configured to determine that at least two first resource groups corresponding to the second resource groups of each second type of transmitting E-PDCCH are first resource groups that are located in different physical resource block pairs and correspond to the same pilot port and have the same location index.

In an optional implementation manner of this embodiment, the fourth determining unit 27 is specifically configured to determine that at least two first resource groups corresponding to the second resource groups of each of the second types of transmitting E-PDCCH are first resource groups that are located in different physical resource block pairs and correspond to the same pilot port and have different location indexes.

In an optional implementation manner of this embodiment, based on the implementation of the second resource groups of the first type, the fourth determining unit 27 is specifically configured to determine that at least two first resource groups corresponding to the second resource groups of each second type for transmitting the E-PDCCH are first resource groups with the same location indexes as at least two first resource groups corresponding to the second resource groups of the first type, which are located in different physical resource block pair location indexes.

In an optional implementation manner of this embodiment, the base station of this embodiment further includes: a second acquisition unit 29. A second obtaining unit 29, configured to define a mapping relationship between the first resource group and the pilot port in advance before the third determining unit 26 uses the mapping relationship between the first resource group and the pilot port; or, the second obtaining unit 29 is configured to generate, before the third determining unit 26 uses the mapping relationship between the first resource group and the pilot port, the mapping relationship between the first resource group and the pilot port according to the local cell identifier.

In an optional implementation manner of this embodiment, the first receiving unit 28 is further configured to receive higher layer signaling, where the higher layer signaling includes a mapping relationship between the first resource group and the pilot port. The first receiving unit 28 specifically receives higher layer signaling sent by the base station.

The functional units of the UE provided in this embodiment may be used to execute the corresponding flow of the E-PDCCH receiving method shown in fig. 1B, and the specific working principle thereof is not described herein, which is described in detail in the method embodiment.

The UE provided by the embodiment is matched with the E-PDCCH transmission base station provided by the implementation of the invention, so that the transmission of the E-PDCCH is completed, the utilization rate of pilot frequency resources is improved, and the space diversity provided by a pilot frequency port is fully utilized.

Fig. 3A is a schematic structural diagram of a base station according to another embodiment of the present invention. As shown in fig. 3A, the base station of the present embodiment includes: a processor 31 and a transmitter 32.

The processor 31 is configured to determine, according to the mapping relationship between the first resource group and the pilot port, a corresponding relationship between the first resource group and the pilot port, and a corresponding relationship between the second resource group and the first resource group and the pilot port, and determine at least one first type of second resource group or at least one second type of second resource group for transmitting the E-PDCCH.

The mapping relationship between the first resource group and the pilot port includes the mapping relationship between at least one first resource group and at least one pilot port in one physical resource unit set. The first resource group is eREG or REG, and the second resource group of the first type is eCCE or control channel candidate; the second resource group of the second type is ecces or control channel candidates. The set of physical resource units is at least one physical resource block pair. The second resource group of the first type corresponds to at least two first resource groups, and the second resource group of the second type corresponds to at least two first resource groups. The specific relationship is satisfied between the corresponding relationship between the second resource group of different types and the first resource group and the pilot port.

And the transmitter 32 is configured to map the second resource group of the first type or the second resource group of the second type determined by the processor 31 to at least one first resource group and pilot port for transmission according to the corresponding relationship between the first resource group and the pilot port determined by the processor 31.

In an optional implementation manner of this embodiment, the second resource group of the first type is a resource group when the E-PDCCH is transmitted in a centralized manner; the second resource group of the second type is a resource group when the E-PDCCH is transmitted in a discrete manner.

In an optional implementation manner of this embodiment, the determining, by the processor 31, a correspondence between the second resource group of the first type and the first resource group and the pilot port according to a specific relationship according to a mapping relationship between the first resource group and the pilot port includes: the processor 31 is specifically configured to determine, according to a mapping relationship between a first resource group and a pilot port, that at least two first resource groups corresponding to a second resource group of a first type include at least two different pilot ports in a port set corresponding to the mapping relationship between the first resource group and the pilot port, and determine that a pilot port adopted for transmission of each second resource group of the first type is a pilot port corresponding to a first or last first resource group of at least two first resource groups corresponding to a second resource group of the first type.

In an optional implementation manner of this embodiment, the determining, by the processor 31, that at least two first resource groups corresponding to the second resource groups of the first type include at least two different pilot ports in a port set corresponding to the mapping relationship between the first resource groups and the pilot ports includes: the processor 31 is more specifically configured to determine that at least two first resource groups corresponding to the second resource groups of the first type include at least two different pilot ports in the port set corresponding to the mapping relationship between the first resource groups and the pilot ports, where the at least two different pilot ports are at least two pilot ports used for transmission in each physical resource block pair when the E-PDCCH is transmitted by the at least one second resource group of the second type.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-transmission in each physical resource block pair is two, and the pilot ports are respectively the first pilot port and the second pilot port, or the third pilot port and the fourth pilot port, the processor 31 is specifically configured to determine that each second resource group of the first type corresponds to two first resource groups, and determine that the port sets corresponding to the two first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports include two different pilot ports, where the two different pilot ports are respectively the first pilot ports and the second pilot ports, or are respectively the third pilot ports and the fourth pilot ports.

In an optional implementation manner of this embodiment, based on the above, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-pair transmission of each physical resource block is two, that is, the first pilot port and the second pilot port are respectively transmitted, or that the second pilot port and the fourth pilot port are respectively transmitted, the processor 31 is specifically configured to determine that each second resource group of the first type corresponds to four first resource groups, and that the port set corresponding to the four first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports includes four different pilot ports, where the four different pilot ports are respectively the first pilot port, the second pilot port, the third pilot port and the fourth pilot port.

In an optional implementation manner of this embodiment, based on the foregoing, that is, when the number of the second resource groups of the at least one second type for transmitting the E-PDCCH is greater than the preset number threshold, under the condition that the number of pilot ports adopted for intra-pair transmission of each physical resource block is two, and the pilot ports are respectively the first pilot port and the second pilot port, or are respectively the third pilot port and the fourth pilot port, the processor 31 is specifically configured to determine that each second resource group of the first type corresponds to four first resource groups, and that the port set corresponding to the four first resource groups corresponding to the second resource groups of the first type in the mapping relationship between the first resource groups and the pilot ports includes two different pilot ports, where the two different pilot ports are respectively the first pilot port and the second pilot port, or are respectively the third pilot port and the fourth pilot port.

In an alternative implementation of this embodiment, the processor 31 is specifically configured to determine that at least two first resource groups corresponding to the second resource groups of each second type of transmitting the E-PDCCH are first resource groups that are located in different pairs of physical resource blocks and correspond to the same pilot port and have the same location index.

In an optional implementation manner of this embodiment, the processor 31 is specifically configured to determine that at least two first resource groups corresponding to each second resource group of the second type for transmitting the E-PDCCH are first resource groups that are located in different physical resource block pairs and correspond to the same pilot port and have different location indexes.

In an optional implementation manner of this embodiment, based on the implementation of the second resource groups of the first type, the processor 31 is specifically configured to determine that at least two first resource groups corresponding to the second resource groups of each second type for transmitting the E-PDCCH are first resource groups with the same position indexes as at least two first resource groups corresponding to the second resource groups of the first type, which are located in different physical resource block pairs.

In an optional implementation manner of this embodiment, the transmitter 32 is further configured to send higher layer signaling, where the higher layer signaling includes the mapping relationship between the first resource group and the pilot port. Specifically, the transmitter 32 transmits higher layer signaling to the UE to provide the mapping relationship between the first resource group and the pilot port to the UE.

In an optional implementation manner of this embodiment, the processor 31 is further configured to define, in advance, a mapping relationship between the first resource group and the pilot port before the processor 31 uses the mapping relationship between the first resource group and the pilot port; alternatively, the processor 31 is further configured to generate, before the processor 31 uses the mapping relationship between the first resource group and the pilot port, the mapping relationship between the first resource group and the pilot port according to the local cell identifier.

The base station provided in this embodiment may be used to execute the procedure of the E-PDCCH transmission method described above, and the specific working principle thereof is not described in detail in the description of the method embodiment.

According to the mapping relation between the first resource group and the pilot port, the base station determines the corresponding relation between the first type second resource group and the second type second resource group and the first resource group and the pilot port respectively according to the specific relation, then determines at least one first type second resource group or at least one second type second resource group for transmitting the E-PDCCH, and maps the first type second resource group or the second type second resource group for transmitting the E-PDCCH to at least one first resource group and the pilot port for transmission according to the corresponding relation between the first type second resource group or the second type second resource group and the first resource group and the pilot port, thereby solving the transmission problem of the E-PDCCH. Furthermore, the E-PDCCH transmission base station of the embodiment can also improve the utilization rate of the pilot frequency port and realize space diversity.

Fig. 3B is a schematic structural diagram of a UE according to another embodiment of the present invention. As shown in fig. 3B, the UE of the present embodiment includes: a processor 35 and a receiver 36.

The processor 35 is configured to determine, according to the mapping relationship between the first resource group and the pilot port, a corresponding relationship between the first resource group and the pilot port, and a corresponding relationship between the second resource group and the first resource group and the pilot port, and determine at least one first type of second resource group or at least one second type of second resource group for transmitting the E-PDCCH.

And a receiver 36, configured to receive, on at least one of the first resource group and the pilot port, the second resource group of the at least one first type or the second resource group of the second type determined by the processor 35, according to the correspondence between the second resource group of the first type or the second type determined by the processor 35 and the first resource group and the pilot port.

The UE provided in this embodiment may be used to execute the procedure of the E-PDCCH receiving method provided in the foregoing embodiment, and the specific working principle and other functions of the UE may be referred to the description of the foregoing method embodiment, which is not repeated herein.

The UE provided by the embodiment is matched with the base station provided by the embodiment, so that the transmission of the E-PDCCH is completed, and in addition, the utilization rate of a pilot frequency port can be improved, and the space diversity is realized.

Fig. 4A is a flowchart of a transmission method of an E-PDCCH according to an embodiment of the present invention. The execution body of the embodiment may be a base station or a UE, that is, the UE is matched with the base station, and numbers are performed on the first type of second resource group and the second type of second resource group in the same manner, so as to facilitate transmission of the E-PDCCH and improve the blind detection efficiency. As shown in fig. 4A, the transmission method of the present embodiment includes:

Step 401, in a physical resource block set, ordering a first resource group in each PRB pair, where the first resource group is eREG or REG, and the physical resource block set includes at least one physical resource block pair.

In this embodiment, the set of physical resource blocks includes at least one physical resource block pair, and the first resource group in the set of physical resource blocks is constituted by the first resource group in each physical resource block pair in the set of physical resource blocks. And sequencing the first resource groups in the physical resource block set according to the sequence of the physical resource block pairs, and obtaining the sequencing number of each first resource group.

TABLE 7

As shown in table 7, assuming that the physical resource block set includes four physical resource block pairs, and one PRB pair includes L eregs, for example, l=16, for ai, i=1 to 16, and a1 to a16 correspond to index indexes of eregs, and a1 to a16 have values different from each other in 0 to 15. In each PRB pair in the same control channel resource block set, L eregs are divided into the same K eREG groups. If k=4, 16 eregs are divided into 4 eREG groups.

For ecces of the localized transmitted ePDCCH, each eCCE corresponds to one REG group, and the dashed boxes in table 7 show ecces of one localized transmitted ePDCCH. As shown in table 7, in one PRB pair, 4 ecces correspond to the 4 REG groups, respectively, the first eREG group (eREG group 1) includes (eREG (a 1), eREG (a 2), eREG (a 3), eREG (a 4)), the second eREG group (eREG group 2) includes (eREG (a 5), eREG (a 6), eREG (a 7), eREG (a 8)), the third eREG group (eREG group 3) includes (eREG (a 9), eREG (a 10), eREG (a 11), eREG (a 12)), and the fourth eREG group (eREG group 4) includes (eREG (a 13), eREG (a 14), eREG (a 15), eREG (a 16)).

The above-mentioned eREG group division method is adopted in each PRB pair in the same control channel resource block set. For different PRB pairs, the arrangement order of the eREGs is different in each eREG group containing the same eREG. For example, the same is true for the eREG group 1 including the same elements (eREG (a 1), eREG (a 2), eREG (a 3), eREG (a 4)), the arrangement order in the PRB pair1 is (eREG (a 1), eREG (a 2), eREG (a 3), eREG (a 4)), the arrangement order in the PRB pair2 is (eREG (a 2), eREG (a 3), eREG (a 4), eREG (a 1)), the arrangement order in the PRB pair3 is (eREG (a 3), eREG (a 4), eREG (a 1), eREG (a 2)), and the arrangement order in the PRB pair3 is (eREG (a 4), eREG (a 1), eREG (a 2), eREG (a 3)). The order of arrangement may not be cyclic shift of different PRB pairs. Other eREG groups may also be arranged in a similar manner, and are not described in detail herein.

By the method, the eCCEs of the ePDCCH transmitted in a centralized manner are obtained.

Each eCCE of the ePDCCH of the discrete transmission may correspond to each row in table 7, i.e., within an eREG group including the same eREG element in each PRB pair, different eREG elements are taken to form ecces of the ePDCCH of the discrete transmission, respectively, as shown in a solid line box in table 7 as one eCCE of the ePDCCH of the discrete transmission. For example, an eREG group including the same eREG elements (eREG (a 1), eREG (a 2), eREG (a 3), eREG (a 4)) in each PRB is referred to as eREG group 1, and ecces of ePDCCH for discrete transmission are formed by taking different elements in eREG group 1 of different PRB pairs. For example, the eREG (a 1) is taken in eREG group 1 of PRB pair1, the eREG (a 2) is taken in eREG group 1 of PRB pair2, the eREG (a 3) is taken in eREG group 1 of PRB pair3, and the eREG (a 4) is taken in eREG group 1 of PRB pair4, i.e. the set of all eregs in the first row in table 7 constitutes ecces of one discrete transmission ePDCCH; the eREG (a 2) is taken in the eREG group 1 of the PRB pair1, the eREG (a 3) is taken in the eREG group 1 of the PRB pair2, the eREG (a 4) is taken in the eREG group 1 of the PRB pair3, and the eREG (a 1) is taken in the eREG group 1 of the PRB pair4, that is, the set of all eregs in the second row in table 7 forms the eCCE of another discrete transmission ePDCCH, and similarly, each row in table 7 forms the eCCE of one discrete transmission ePDCCH. This approach may also be understood as taking eregs of different numbers corresponding to eREG elements contained in a centralized eCCE in each PRB pair to form an eCCE of the ePDCCH for discrete transmission.

The number of eregs corresponding to a1 to a16 in table 7 may be as follows:

a1 A2, a3, a4 correspond to

eREG numbers

0,4,8,12, respectively;

a5 A6, a7, a8 correspond to

eREG numbers

1,5,9,13, respectively;

a9 A10, a11, a12 correspond to

eREG numbers

2,6,10,14, respectively;

a13 A14, a15, a16 correspond to

eREG numbers

3,9,11,15, respectively.

The specific resource set size may be a set containing l×b eregs, M is the number of eregs contained in each eCCE, B is the number of PRB pairs, and b×m eregs are a set containing only indexes of B eregs.

The form of ecces of the discrete and centralized ePDCCH has been determined in the above manner, and based on the above principle, the ecces need to be numbered, and the purpose of the eCCE numbering is as follows: because the corresponding relation between the logic ecces and the physical ecces needs to be determined first, how the logic ecces are mapped to the physical ecces can be ensured, or the composition of the search interval and the resource binding relation during the feedback of the HARQ need to be associated with the indexes of the ecces.

Step 402, numbering a second resource group according to a corresponding relation between the first resource group and the second resource group in the physical resource block set, where the second resource group is a control channel unit eCCE group or a control channel candidate group.

Preferably, for the second resource group of the first type (for example, ecces of the ePDCCH transmitted in a centralized manner), the second resource group may be numbered in any of the following manners:

mode one

Each physical resource block pair comprises N third resource groups, wherein N is a positive integer, each third resource group comprises M first resource groups, and in the physical resource block sets, the number set of the first resource groups contained in each third resource group in one physical resource block pair is the same as the number set of the first resource groups contained in one third resource group in each other physical resource block pair; numbering the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set includes: and each third resource group corresponds to a second resource group of the first type, and the second resource groups of the first type in each physical resource block pair are numbered sequentially according to the sequence from small to large or from large to small of the numbers of the physical resource block pairs, wherein in each physical resource block pair, the numbers of the second resource groups of the first type and the numbers of the first resource groups corresponding to the second resource groups of the first type have a corresponding relationship.

Optionally, in each physical resource block pair, a correspondence exists between the number of the second resource group of the first type and the number of the first resource group corresponding to the second resource group of the first type, including: in each physical resource block pair, the numbers of the second resource groups of the first type are continuous, and the sequence of the numbers of the second resource groups of the first type is the same as the sequence of the maximum numbers or the minimum numbers of the first resource groups corresponding to the second resource groups of the first type.

In a preferred implementation of the present invention, the first mode may include:

numbering the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set includes: determining the number of the second resource group of the first type according to the following formula:

j＝K*m+(i mod K)，

For example, for ecces of a control channel for centralized transmission, the numbering principle may be to sequentially number all ecces in each PRB pair from the first PRB pair, and then sequentially number all ecces in the next PRB pair. The sequence of numbering the ecces within each PRB pair is arranged in order of decreasing size according to the smallest number of eregs contained within each eCCE, e.g.,

eREG numbers

0,4,8,12 contained in one eCCE and

eREG numbers

1,5,9,13 contained in another eCCE in one PRB pair; the minimum number of eregs included in the first eCCE is 0 and the minimum number of eregs included in the other eCCE is 1, and at this time, the eCCE number of which the minimum number of eregs included is 0 may be placed before the eCCE of which the minimum number of eregs included is 1. By the method in this embodiment, the final numbering may be as shown in fig. 4B, where in fig. 4B, each circle represents an eCCE, and the number within the circle represents the number of the eCCE. The arrangement of eregs in fig. 4B-4E is the same as in table seven.

Mode two

Each physical resource block pair comprises N third resource groups, wherein N is a positive integer, each third resource group comprises M first resource groups, the number set of the first resource groups contained in each third resource group in one physical resource block pair is the same as the number set of the first resource groups contained in one third resource group in each other physical resource block pair, and the sequence of the numbers of the third resource groups in each physical resource block pair is the same as the sequence of the maximum numbers or the minimum numbers of the first resource groups in the third resource groups; numbering the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set includes: and each third resource group corresponds to a second resource group of the first type, the second resource groups of the first type corresponding to the third resource groups with the same number are sequentially numbered according to the sequence of the third resource group numbers from small to large or from large to small, and the sequence of the numbers of the second resource groups of the first type and the sequence of the numbers of the physical resource block pairs where the second resource groups of the first type are located are in the second resource groups of the first type corresponding to the third resource groups with the same number.

Optionally, in the second resource group of the first type corresponding to the third resource group with the same number, there is a correspondence between an order of numbers of the second resource group of the first type and an order of numbers of the physical resource block pairs where the second resource group of the first type is located, including: in the second resource group of the first type corresponding to the third resource group with the same number, the numbers of the second resource group of the first type are continuous, and the sequence of the numbers of the second resource group of the first type is the same as the sequence of the numbers of the physical resource block pairs where the second resource group of the first type is located.

In a preferred example of the embodiment of the present invention, the second mode may include:

j＝(i mod K)*K+m，

For example, for ecces of a control channel for centralized transmission, the numbering principle may be to sequentially number the same eREG groups in all PRB pairs from the first PRB pair, where the same eREG groups include the same eREG element in each PRB pair, then number the next eREG group, and the order of the eREG group numbers is in the order of PRB index (PRB number) from small to large, for example, for eREG group 1 in table 7, the numbering is to sequentially number eREG group 1 in PRB pair1 first, number eREG group 1 in PRB pair2 second, and number eREG group 2 in the same manner. The numbering may be as shown in fig. 4C. In fig. 4C, each circle represents an eCCE of a control channel for centralized transmission, and the number within the circle represents the number of the eCCE.

Preferably, in the first and second modes, for a second resource group of the first type corresponding to a third resource group of the same number, the mapping relationship between the second resource group of the first type in one physical resource block pair and the first resource group contained therein is a cyclic shift of the mapping relationship between the second resource group of the first type in each other physical resource block pair and the first resource group contained therein.

Optionally, for the second resource group of the second type (e.g. ecces of the ePDCCH of discrete transmission), the second resource group may be numbered by one of the following methods:

a first method,

Preferably, numbering the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set includes: the second resource group of the second type comprises M first resource groups respectively belonging to different physical resource block pairs; and using the number of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type as the number of the second resource group of the second type.

Optionally, numbering the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set includes:

j＝(i-K*m)mod16，

i＝(j+x*K)mod N，

m＝(floor(j/(M*K))*M+x)mod C，

For example, as shown in fig. 4D, each circle represents a discrete eCCE, and the numbers in the circles represent the number of ecces. The numbering scheme may be the same as the number of eregs included in a specific PRB pair for each eCCE, for example, if index of eregs included in four PRB pairs for the eCCE of the first row in table 7 is 0,4,8,10 in order, index 0 of eregs included in PRB pair1 is used as the number of ecces.

Preferably, the set of physical resource blocks includes a set of K second resource groups of a second type, and in each set of K sets, a mapping relationship between a second resource group of a second type and a first resource group contained therein is a cyclic shift of a mapping relationship between a second resource group of each other second type and a first resource group contained therein.

A second method,

Numbering the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set includes: the second resource group of the second type comprises M first resource groups respectively belonging to different physical resource block pairs, the physical resource block set comprises K sets of the second resource groups of the second type, K is a positive integer, and the mapping relation between one second resource group of the second type and the first resource group contained in the second resource group of the second type is the cyclic shift of the mapping relation between the second resource group of the other second type and the first resource group contained in the second resource group of the second type in each set of the K sets; numbering the second resource group of the second type according to the magnitude relation of the numbers of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type in each of the K sets; the sequence of the numbers of the second resource groups of the second type is the same as the sequence of the largest or smallest numbers of the first resource groups corresponding to different sets of the K sets in the same physical resource block pair between different sets of the K sets.

For example, as shown in fig. 4E, each circle represents a discrete eCCE, and the number within the circle represents the number of the eCCE. The numbering may be performed by numbering one eCCE group, where the eCCE group refers to a group of ecces, and eregs included in each eCCE in the group are the same numbers, but eregs in each PRB pair are different numbers. For example, eCCE group 1 is the 4 ecces corresponding to the first 4 rows in table 2. Each eCCE contains eREG0,4,8,12, and the PRB pair in which eREG0,4,8,12 is located is different in different ecces. Each eCCE is first numbered in the order of a specific PRB pair, for example, in the first PRB pair, the eREG index of each eCCE in the PRB pair is numbered in order from small to large. And numbering each eCCE in the next eCCE group in turn.

Preferably, if the first resource group corresponding to the second resource group of the at least two first types in the set of physical resource blocks is identical to the first resource group corresponding to the second resource group of the at least two second types in the set of physical resource blocks, the set of numbers of the second resource group of the at least two first types is identical to the set of numbers of the second resource group of the at least two second types.

For example, the numbering system of the concentrated ecces and the numbering system of the discrete ecces have a correspondence relationship, and the correspondence relationship may be: if the numbering mode of the centralized ecces is mode 1, adopting a method 1 for the numbering mode of the discrete ecces; if the numbering scheme of the centralized ecces is scheme 2, the numbering scheme of the discrete ecces adopts scheme 2.

The principle of the correspondence relationship is as follows: within a particular set of resources, the numbering group of the contained centralized ecces is the same as the numbering group of the contained discrete ecces. For example, the numbers of the concentrated ecces included in the resource sets within the dashed boxes in fig. 1 and 3 are 0,4,8, and 12, respectively, and the numbers of the discrete ecces are 0,4,8, and 12, respectively. Similarly, in the resource combinations within the dashed boxes in fig. 2 and 4, the numbers of the concentrated ecces included therein are 0,1,2, and 3, respectively, and the numbers of the discrete ecces are 0,1,2, and 3, respectively.

Optionally, the second resource group of the first type in the physical resource block set is a resource group adopting centralized transmission E-PDCCH; the second resource group of the second type in the physical resource block set is a resource group adopting a discrete transmission E-PDCCH.

Step 403, determining the number of the second resource group for transmitting the E-PDCCH, and mapping the E-PDCCH to the corresponding first resource group for transmission according to the determined number.

As can be seen from the foregoing, the present embodiment achieves numbering of the first type of second resource group and the second type of second resource group, which is beneficial to blind detection.

For the case that each eCCE contains 4 eregs, the order of internal specific mapping is not considered, and only the case of combination is considered, there are 4 cases that the eCCE can be a centrally transmitted eCCE or a discretely transmitted eCCE

eCCE X1(eREG0，eREG4，eREG8，eREG12)，

eCCE X2(eREG1，eREG5，eREG9，eREG13)，

eCCE X3(eREG2，eREG6，eREG10，eREG14)，

eCCE X4(eREG3，eREG7，eREG11，eREG15)，

When each eCCE contains 8 eregs,

the index of the eREG included in eCCE Y1 may be constituted by a combination of the indexes of the eregs included in eCCE X1 and eCCE X2, for example

eCCE Y1(eREG0，eREG4，eREG8，eREG12，eREG1，eREG5，eREG9，eREG13)；

eCCE Y2(eREG2，eREG6，eREG10，eREG14，eREG3，eREG7，eREG11，eREG15)；

In this case, when the number of CRS ports is 1, this combination may reach that the number of available REs contained in eCCE Y1 is closest to the number of available REs contained in eCCE Y2. Because (eREG 0, eREG4, eREG8, eREG 12) and (eREG 2, eREG6, eREG10, eREG 14) are always simultaneously on the subcarrier where the pilot is located, resulting in fewer available REs than (eREG 1, eREG5, eREG9, eREG 13) and (eREG 3, eREG7, eREG11, eREG 15); or alternatively

Because (eREG 1, eREG5, eREG9, eREG 13) and (eREG 3, eREG7, eREG11, eREG 15) are always simultaneously on the subcarrier where the pilot is located, less available REs are caused than (eREG 0, eREG4, eREG8, eREG 12) and (eREG 2, eREG6, eREG10, eREG 14). It is therefore necessary to disperse the eREG group in which the pilots are located at the same time in two ecces.

Or alternatively

eCCE Y1(eREG0，eREG4，eREG8，eREG12，eREG2，eREG6，eREG10，eREG14)；

eCCE Y2(eREG1，eREG5，eREG9，eREG13，eREG3，eREG7，eREG11，eREG15)；

For discrete transmitted ecces, each eCCE contains 8 eregs, and the control channel resource set contains 8 eregs, in two ways,

mode 1:

one is to map the number of eregs included in eCCE Y1 to 8 eregs in order from small to large, for example, the index of eregs of eCCE0 in table 1 among 8 PRB pairs is (eREG 0, eREG1, eREG4, eREG5, eREG8, eREG9, eREG12, eREG 13), and the number of eregs included in 7 ECCEs is the same as that, but the eregs are cyclic shifted in the mapping order among different PRB pairs. The cyclic shift is the order of sequential cyclic shifts. The mapping order of 8 PRB pairs, e.g. eCCE1, is (eREG 1, eREG4, eREG5, eREG8, eREG9, eREG12, eREG13, eREG 0)

Mode 2:

one is to divide the number of eregs included in eCCE Y1 into two groups, where the number of eregs included in each group is the same as that of an eCCE including 4 eregs, and the index of eregs in 8 PRB pairs of eCCE0 is ((eREG 0, eREG4, eREG8, eREG 12), (eREG 2, eREG6, eREG10, eREG 14)). A first group (eREG 0, eREG4, eREG8, eREG 12), a second group (eREG 2, eREG6, eREG10, eREG 14); eCCE0 is mapped to each of the 8 PRB pairs in the order ((eREG 0, eREG4, eREG8, eREG 12), (eREG 2, eREG6, eREG10, eREG 14)) and the mapping order of the groups (first group, second group). There are 7 ECCEs with the same number of eregs contained therein, but the cyclic shift is not a sequential cyclic shift, but may be, first, an inter-group shift, and then a cyclic shift within a group. For example, eCCE9 in table 3 (second group, first group) is a cyclic shift of the mapping order of the groups of ecces 0 (first group, second group), i.e., (second group (6,10,14,2), first group (4,8,12,0)), then the order of eregs within the first group of ecces 9 is cyclic shifted with respect to the order of eregs within the first group of ecces 0, and the order of eregs within the second group is cyclic shifted with respect to the order of eregs within the second group of ecces 0. Or there is no inter-group cycle, only intra-group cyclic shifts, e.g., eCCE1 relative to eCCE0, and no inter-group shifts, only intra-group shifts. Among 8 ecces containing the same eREG index, three are no shift between groups, only shift within a group, and the other 4 are shift within a group and shift between groups, and there is an effect that a mapping mode that one eCCE contains 4 eregs can be reused within each group, and implementation is simple.

TABLE 1.1 8 PRB pairs with 8 eREGs per eCCE, eCCE and eREG mapping mode 3

ECCE index	ECCE0	ECCE1	ECCE2	ECCE3	ECCE4	ECCE5	ECCE6	ECCE7	ECCE8	ECCE9	ECCE10	ECCE11	ECCE12	ECCE13	ECCE14	ECCE15
																	PRB pair
0	0	1	4	5	8	9	12	13	2	3	6	7	10	11	14	15
																	PRB pair 1	1	4	5	8	9	12	13	0	3	6	7	10	11	14	15	2
PRB pair 2	4	5	8	9	12	13	0	1	6	7	10	11	14	15	2	3
																	PRB pair 3	5	8	9	12	13	0	1	4	7	10	11	14	15	2	3	6
PRB pair 4	8	9	12	13	0	1	4	5	10	11	14	15	2	3	6	7
																	PRB pair 5	9	12	13	0	1	4	5	8	11	14	15	2	3	6	7	10
PRB pair 6	12	13	0	1	4	5	8	9	14	15	2	3	6	7	10	11
																	PRB pair 7	13	0	1	4	5	8	9	12	15	2	3	6	7	10	11	14

TABLE 2.1 4 PRB pairs with each eCCE containing 4 eREGs, discrete eCCE and eREG mapping mode 1

ECCE index	ECCE0	ECCE1	ECCE2	ECCE3	ECCE4	ECCE5	ECCE6	ECCE7	ECCE8	ECCE9	ECCE10	ECCE11	ECCE12	ECCE13	ECCE14	ECCE15
																	PRB pair
0	0	4	8	12	1	5	9	13	2	6	10	14	3	7	11	15
																	PRB pair 1	4	8	12	0	5	9	13	1	6	10	14	2	7	11	15	3
PRB pair 2	8	12	0	4	9	13	1	5	10	14	2	6	11	15	3	7
																	PRB pair 3	12	0	4	8	13	1	5	9	14	2	6	10	15	3	7	11

TABLE 3.1 8 PRB pairs with 8 eREGs per eCCE, eCCE and eREG mapping patterns 1-1

/>

For 8 PRB pairs included in one control channel resource set and 8 eregs included in each eCCE, the mapping relationship between ecces and eregs in the 8 PRBs is the same as in the case where 4 PRB pairs are included in the control channel set and 4 eregs are included in each eCCE described in table 2, and it can be seen that the first 4 rows in table 2 are identical to those in table 1,

however, in the last 4 rows, that is, in the last 4 PRB pairs (PRB pair 4,PRB pair 5,PRB pair6,PRB pair 7), the mapping between ecces and eregs is a cyclic shift of the mapping relationship between the first 4 PRB pairs ecces and eregs, for example, 8 bits are cyclically shifted, and then ecces 8 to the first 4 eregs of ecces 15 in the first 4 RPB pairs are cyclically shifted by 8 bits, and become the last 4 eregs of ecces 0 to 7; the first 4 eregs of ecces 0 through 7 in the first 4 RPB pairs are cyclically shifted by 8 bits to become the last 4 eregs of ecces 8 through 15.

Or alternatively

TABLE 4.1 8 PRB pairs with 8 eREGs per eCCE, eCCE and eREG mapping patterns 1-2

For 8 PRB pairs included in one control channel resource set and 8 eregs included in each eCCE, the mapping relationship between ecces and eregs in the 8 PRBs is the same as in the case where 4 PRB pairs are included in the control channel set and 4 eregs are included in each eCCE described in table 1, and it can be seen that the first 4 rows in table 2 are identical to those in table 1,

however, in the last 4 rows, that is, in the last 4 PRB pairs (PRB pair 4,PRB pair 5,PRB pair6,PRB pair 7), the mapping between ecces and eregs is a cyclic shift of the mapping relationship between the first 4 PRB pairs ecces and eregs, for example, the first 4 eregs in ecces (i, j-4) are the same as those in table 2, and the last 4 eregs are the same as eregs corresponding to ecces (i+ 4,j-4), where i is the number of ecces, j is an integer from 0 to 3, and the j is the j-th eREG included in the first 4 eregs.

TABLE 5.1 8 PRB pairs with each eCCE containing 4 eREGs, eCCE and eREG mapping patterns 1-1

For table 5, the case where 8 PRB pairs are included in each control channel resource set and 4 eregs are included in each eCCE

The mapping manner of ecces 0 to ecces 7 in table 1 is adopted for the mapping manner of ecces and eregs of the first 4 PRBs, and the mapping manner of ecces 8 to ecces 15 in table 1 is adopted for the mapping manner of ecces and eregs of the last 4 PRBs.

TABLE 6.1 8 PRB pairs with each eCCE containing 4 eREGs, eCCE and eREG mapping patterns 1-2

For table 6, the case where 8 PRB pairs are included in each control channel resource set and 4 eregs are included in each eCCE

The mapping manner of ecces and eregs of the first 4 PRBs is the mapping manner of ecces with even numbers in table 1, and the mapping manner of ecces and eregs of the last 4 PRBs is the mapping manner of ecces with odd numbers in table 1. Or an odd number of interchanges.

TABLE 7.1 4 PRB pairs with 8 eREGs per eCCE, eCCE and eREG mapping scheme

TABLE 8.1 8 PRB pairs with 8 eREGs per eCCE, eCCE and eREG mapping pattern 2-1

Fig. 5 is a schematic structural diagram of a transmission device for an E-PDCCH according to an embodiment of the present invention. The device may be a base station or a user equipment. As shown in fig. 5, the transmission apparatus of the E-PDCCH of the present embodiment includes: a sorting unit 51, a numbering unit 53, a fifth determining unit 52, and a transmitting unit 54.

The ordering unit 51 is configured to order, in a physical resource block set, a first resource group in each physical resource block pair, where the first resource group is a resource element group eREG or REG, and the physical resource block set includes at least one physical resource block pair.

And a numbering unit 52, configured to number a second resource group in the physical resource block set according to a correspondence between the first resource group and the second resource group, where the second resource group is a control channel unit eCCE group or a control channel candidate group.

The fifth determining unit 52 is configured to determine a number of the second resource group for transmitting the E-PDCCH.

The transmission unit 54 is configured to map the E-PDCCH to a corresponding first resource group for transmission according to the determined number.

Preferably, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, and in the physical resource block sets, a number set of the first resource group included in each third resource group in one physical resource block pair is the same as a number set of the first resource group included in one third resource group in each other physical resource block pair, and each third resource group corresponds to one second resource group of the first type; the numbering unit 52 is configured to sequentially number the second resource groups of the first type in each physical resource block pair in order from small to large or from large to small, where in each physical resource block pair, a correspondence exists between the number of the second resource group of the first type and the number of the first resource group corresponding to the second resource group of the first type.

Optionally, the numbering unit 52 is configured to determine the number of the second resource group of the first type according to the following formula:

j＝K*m+(i mod K)，

Preferably, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, in the physical resource block set, a number set of the first resource groups included in each third resource group in one physical resource block pair is the same as a number set of the first resource groups included in one third resource group in each other physical resource block pair, in each physical resource block pair, a sequence of numbers of the third resource groups is the same as a sequence of maximum numbers or minimum numbers of the first resource groups in the third resource groups, and each third resource group corresponds to one second resource group of the first type; the numbering unit 52 is configured to sequentially number, in order from small to large or from large to small, second resource groups of the first type corresponding to third resource groups having the same number, where there is a correspondence between the order of numbers of the second resource groups of the first type and the order of numbers of the physical resource block pairs where the second resource groups of the first type are located in the second resource groups of the first type corresponding to the third resource groups having the same number.

Preferably, the numbering unit 52 is configured to determine the numbering of the second resource group of the first type according to the following formula:

j＝(i mod K)*K+m，

Preferably, for the second resource group of the first type corresponding to the third resource group with the same number, the mapping relationship between the second resource group of the first type in one physical resource block pair and the first resource group contained in the second resource group is a cyclic shift of the mapping relationship between the second resource group of the first type in each other physical resource block pair and the first resource group contained in the second resource group.

Optionally, the second resource group of the second type includes M first resource groups respectively belonging to different physical resource block pairs; the numbering unit 52 is configured to use, as the number of the second resource group of the second type, the number of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type.

Preferably, the numbering unit 52 is configured to determine the number of the second resource group of the second type according to the following formula:

j＝(i-K*m)mod16，

The numbering unit 52 is configured to determine the number of the second resource group of the second type according to the following formula:

i＝(j+x*K)mod N，

m＝(floor(j/(M*K))*M+x)mod C，

Preferably, the second resource group of the second type includes M first resource groups respectively belonging to different physical resource block pairs, the physical resource block set includes K sets of second resource groups of the second type, K is a positive integer, and in each of the K sets, a mapping relationship between the second resource group of the second type and the first resource group included therein is a cyclic shift of a mapping relationship between the second resource group of each other second type and the first resource group included therein; the numbering unit 52 is configured to number, in each of the K sets, the second resource group of the second type according to a size relationship of numbers of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type; the sequence of the numbers of the second resource groups of the second type is the same as the sequence of the largest or smallest numbers of the first resource groups corresponding to different sets of the K sets in the same physical resource block pair between different sets of the K sets.

Optionally, the physical resource set includes K sets of second resource groups of the second type, and in each set of the K sets, a mapping relationship between a second resource group of the second type and a first resource group contained therein is a cyclic shift of a mapping relationship between a second resource group of each other second type and the first resource group contained therein.

Preferably, the second resource group of the first type in the physical resource block set is a resource group adopting centralized transmission E-PDCCH; the second resource group of the second type in the physical resource block set is a resource group adopting a discrete transmission E-PDCCH.

The transmission device of the embodiment realizes the numbering of the first type of second resource group and the second type of second resource group, thereby realizing the transmission of the E-PDCCH and being beneficial to blind detection.

Fig. 6 is a schematic structural diagram of a transmission apparatus for E-PDCCH according to another embodiment of the present invention. The device may be a base station or a user equipment. As shown in fig. 6, the apparatus of this embodiment includes: at least one processor 61, and a transceiver 62, the transceiver 62 being for receiving and transmitting signals, wherein the processor 61 is for performing the steps of:

in a physical resource block set, respectively ordering a first resource group in each physical resource block pair, wherein the first resource group is a resource element group eREG or REG, and the physical resource block set comprises at least one physical resource block pair;

numbering a second resource group in the physical resource block set according to the corresponding relation between the first resource group and the second resource group, wherein the second resource group is a control channel unit (eCCE) group or a control channel candidate group;

determining the number of the second resource group transmitting E-PDCCH;

and mapping the E-PDCCH to a corresponding first resource group for transmission according to the determined number.

Preferably, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, and in the physical resource block sets, a number set of the first resource groups included in each third resource group in one physical resource block pair is the same as a number set of the first resource groups included in one third resource group in each other physical resource block pair; the processor 61 is configured to number the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set by: and each third resource group corresponds to a second resource group of the first type, and the second resource groups of the first type in each physical resource block pair are numbered sequentially according to the sequence from small to large or from large to small of the numbers of the physical resource block pairs, wherein in each physical resource block pair, the numbers of the second resource groups of the first type and the numbers of the first resource groups corresponding to the second resource groups of the first type have a corresponding relationship.

Preferably, in each physical resource block pair, a correspondence exists between the number of the second resource group of the first type and the number of the first resource group corresponding to the second resource group of the first type, including: in each physical resource block pair, the numbers of the second resource groups of the first type are continuous, and the sequence of the numbers of the second resource groups of the first type is the same as the sequence of the maximum numbers or the minimum numbers of the first resource groups corresponding to the second resource groups of the first type.

Optionally, the processor 61 is configured to number the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set by:

j＝K*m+(i mod K)，

Preferably, each physical resource block pair includes N third resource groups, where N is a positive integer, each third resource group includes M first resource groups, and in the physical resource block set, a number set of the first resource groups included in each third resource group in one physical resource block pair is the same as a number set of the first resource groups included in one third resource group in each other physical resource block pair, and in each physical resource block pair, a sequence of numbers of the third resource groups is the same as a sequence of maximum numbers or minimum numbers of the first resource groups in the third resource groups; the processor 61 is configured to number the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set by: and each third resource group corresponds to a second resource group of the first type, the second resource groups of the first type corresponding to the third resource groups with the same number are sequentially numbered according to the sequence of the third resource group numbers from small to large or from large to small, and the sequence of the numbers of the second resource groups of the first type and the sequence of the numbers of the physical resource block pairs where the second resource groups of the first type are located are in the second resource groups of the first type corresponding to the third resource groups with the same number.

Preferably, the processor 61 is configured to number the second resource group according to the correspondence between the first resource group and the second resource group in the set of physical resource blocks by:

j＝(i mod K)*K+m，

Optionally, the processor 61 is configured to number the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set by: the second resource group of the second type comprises M first resource groups respectively belonging to different physical resource block pairs; and using the number of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type as the number of the second resource group of the second type.

Preferably, the processor 61 is configured to implement the processor 61 by enabling numbering of the second resource group according to the correspondence of the first resource group and the second resource group in the set of physical resource blocks by:

j＝(i-K*m)mod16，

i＝(j+x*K)mod N，

m＝(floor(j/(M*K))*M+x)mod C，

Optionally, the processor 61 is configured to number the second resource group according to the correspondence between the first resource group and the second resource group in the physical resource block set by: the second resource group of the second type comprises M first resource groups respectively belonging to different physical resource block pairs, the physical resource block set comprises K sets of the second resource groups of the second type, K is a positive integer, and the mapping relation between one second resource group of the second type and the first resource group contained in the second resource group of the second type is the cyclic shift of the mapping relation between the second resource group of the other second type and the first resource group contained in the second resource group of the second type in each set of the K sets; numbering the second resource group of the second type according to the magnitude relation of the numbers of the first physical resource group in the same physical resource block pair corresponding to the second resource group of the second type in each of the K sets; the sequence of the numbers of the second resource groups of the second type is the same as the sequence of the largest or smallest numbers of the first resource groups corresponding to different sets of the K sets in the same physical resource block pair between different sets of the K sets.

Preferably, the physical resource set includes K sets of second resource groups of the second type, and in each set of the K sets, a mapping relationship between a second resource group of the second type and a first resource group contained therein is a cyclic shift of a mapping relationship between a second resource group of each other second type and the first resource group contained therein.

Optionally, if the first resource group corresponding to the second resource group of the at least two first types in the set of physical resource blocks is the same as the first resource group corresponding to the second resource group of the at least two second types in the set of physical resource blocks, the set of numbers of the second resource group of the at least two first types is the same as the set of numbers of the second resource group of the at least two second types.

The device provided by the embodiment realizes the numbering of the first type of second resource group and the second type of second resource group, realizes the transmission of the E-PDCCH, and is beneficial to blind detection.

It is preferable for each centralized control channel candidate to be concentrated on adjacent PRB pairs, but different centralized control channel candidates should be as dispersed as possible so that a centralized control channel can obtain scheduling gain and beam-forming gain. For

aggregation level

1,2 or 4, each control channel candidate may be transmitted in one PRB pair, so N discrete PRB pairs may be configured as search intervals for

aggregation level

1,2 or 4, but for aggregation level 8, if each control channel candidate also uses the search space configured as described above, it may be transmitted on different PRB pairs discretely, which may not obtain scheduling gain. In order to solve the problem, the control channel detection and transmission method provided by the following embodiments of the present invention can differentiate different control channels, transmit different control channels through different physical resource block sets, and support the search interval of control channel candidates transmitted for more than one PRB pair through implicit definition, so that resource configuration can be more flexibly performed, control signaling is saved, and better channel estimation performance of the control channel candidates transmitted for more than one PRB pair can be ensured to be obtained in one PRG.

Fig. 7A is a flowchart of a control channel detection method according to an embodiment of the present invention. As shown in fig. 7A, the method of the present embodiment includes:

step 701, the user equipment UE detects a control channel of a first type in a first set of physical resource blocks, the first set of physical resource blocks comprising at least one physical resource block pair.

Step 702, the UE detects a second type of control channel in a second set of physical resource blocks, the second set of physical resource blocks comprising at least one physical resource block pair.

In an alternative implementation of this embodiment, the first type of control channel is a control channel that employs centralized transmission; the second type of control channel is a control channel employing discrete transmissions.

In an optional implementation manner of this embodiment, the first type of control channel is a control channel that uses centralized transmission and has an aggregation level less than or equal to a preset aggregation threshold; the second type of control channel is a control channel employing centralized transmission and having an aggregation level greater than a preset aggregation threshold.

In an alternative implementation of this embodiment, the first type of control channel is a control channel that uses centralized transmission and the first type of control channel candidates are transmitted within one physical resource block pair; the second type of control channel is a control channel that employs localized transmission and the second type of control channel candidates are transmitted within at least two physical resource block pairs.

Further optionally, the second type of control channel candidate corresponds to at least two physical resource block pairs, and the at least two physical resource block pairs corresponding to the second type of control channel candidate are in the same precoding resource block group (Precoding resource block group, abbreviated as PRG) or the same resource block group (Resource Block Group, abbreviated as RBG) or the same subband, so that channel estimation performance and demodulation performance can be improved.

In an alternative implementation of this embodiment, the at least one physical resource block pair comprised by the first set of physical resource blocks is in a different precoding block group PRG or resource block group RBG or subband.

In an alternative implementation of this embodiment, before detecting the control channel of the first type in the first set of physical resource blocks, the UE includes: the UE receives a first higher layer signaling comprising a first set of resource blocks. I.e. the first set of physical resource blocks may be configured by a higher layer on the network side, in particular by static signaling configuration or dynamic signaling configuration, which may increase the flexibility of configuring the first set of resource blocks.

As shown in fig. 7B, the network side configures a first physical resource block set for the control channel, where the first physical resource block set includes, for example, 4 PRB pairs, and the configuration may adopt a manner of configuring 4 continuous VRBs or a manner of adopting a resource allocation manner 1. The 4 PRB pairs configured are PRB pairs 0,PRB pair 4,PRB pair 12,PRB pair 17 in fig. 7B.

Wherein, the control channel candidates adopting centralized transmission can be transmitted on at least one PRB pair. For example, the search interval for control channel candidates with

aggregation level

1,2, or 4 for centralized transmission is at least one PRB pair in the first set of physical resource blocks, and each control channel candidate is transmitted on only one PRB pair in the first set of physical resource blocks. A control channel candidate with aggregation level 8 for centralized transmission needs to be transmitted on two PRB pairs, and each control channel candidate is defined to be transmitted on two PRB pairs in one PRG or one RBG or one subband, one PRB pair of the two PRB pairs is from the first physical resource block set, and the other PRB pair is from the second physical resource block set. When control channel candidates for localized transmission need to be transmitted on two PRB pairs, the manner shown in fig. 7C may be adopted. The dotted boxes in fig. 7C constitute a first set of physical resource blocks and the filled boxes constitute a second set of physical resource blocks.

Optionally, the second physical resource block set and the first physical resource block set may be configured to the UE in an implicit corresponding relationship, or may also be configured in a high layer signaling manner. Wherein, a recessive corresponding relation is: each RPB pair in the first set of physical resource blocks belongs to a different PRG or RBG or subband, and then a PRB pair associated with the PRB pair in the first set of physical resource blocks is implicitly predefined as a PRB pair in the second set of physical resource blocks within each RPG or RBG or subband. For example, the way of association may be that the distance between the PRB pair in the second physical resource block set and the PRB pair in the first physical resource block set in one PRG or RBG or subband is cyclically different by at least one PRB pair, as shown in fig. 7C, in PRG1, the position index of the PRB pair in the first physical resource block set is 0, and the position index of the PRB pair in the second physical resource block set is 1; within PRG2, the position index of the PRB pair in the first physical resource block set is 4, and the position index of the PRB pair in the second physical resource block set is 5; within PRG5, the position index of the PRBpair in the first set of physical resource blocks is 12 and the position index of the PRB pair in the second set of physical resource blocks is 13; within PRG6, the position index of the PRB pair in the first physical resource block set is 17 and the position index of the PRB pair in the second physical resource block set is 15. The implicit corresponding relation enables the base station to send the first physical resource block set to the UE only through high-level signaling, which is beneficial to reducing signaling notification.

In an alternative implementation of this embodiment, the second set of physical resource blocks includes a first set of physical resource blocks and a third set of physical resource blocks. As shown in fig. 7C, the dotted box and the beveled box simultaneously constitute the second physical resource block set, where the dotted box constitutes the first physical resource block set and the filled box constitutes the third physical resource block set.

Based on the above, one physical resource block pair of at least two physical resource block pairs corresponding to the second type of control channel candidate is a physical resource block pair in the first physical resource block set, and at least one physical resource block pair of the rest physical resource block pairs is a physical resource block pair in the third physical resource block set.

In an alternative implementation of this embodiment, before detecting the second type of control channel in the second set of physical resource blocks, the UE includes: the UE obtains a third resource block set according to the first resource block set and a preset function mapping relation, so that signaling notification can be reduced, and the control channel resource allocation mode is more flexible. Alternatively, the UE receives a second higher layer signaling, the second higher layer signaling including the third set of resource blocks. I.e. the third set of physical resource blocks may be configured by a higher layer on the network side, which may be configured by a higher layer static signaling configuration or a dynamic signaling configuration, which is beneficial to improve the flexibility of the configuration of the third set of physical resource blocks.

The control channel detection method provided by the embodiment can divide the control channels into different types, completes detection and reception of the control channels of different types, and can limit the control channel candidates adopted by transmission to one PRG or RBG or sub-band when adopting centralized transmission, thereby improving channel estimation performance and demodulation performance.

An embodiment of the present invention provides a control channel transmission method, where an execution body of the method is a base station, and the method specifically includes: the base station judges the type of a control channel to be transmitted, if the control channel is judged to be the control channel of the first type, the base station transmits the control channel on a first physical resource block set, and if the control channel is judged to be the control channel of the second type, the base station transmits the control channel on a second physical resource block set, wherein the first physical resource block set comprises at least one physical resource block pair, and the second physical resource block set comprises at least one physical resource block pair.

Specifically, if the first type of control channel is to be transmitted, the base station transmits on the first set of physical resource blocks, and if the second type of control channel is to be transmitted, the base station transmits on the second set of physical resource blocks.

In an optional implementation manner of this embodiment, the first type of control channel is a control channel that uses centralized transmission and has an aggregation level less than or equal to a preset aggregation threshold; the second type of control channel is a control channel which adopts centralized transmission and has an aggregation level greater than the preset aggregation threshold.

Further optionally, the second type of control channel candidate corresponds to at least two physical resource block pairs, and the at least two physical resource block pairs corresponding to the second type of control channel candidate are in the same PRG or the same RBG or the same subband, which is beneficial to high channel estimation performance and demodulation performance.

In an alternative implementation of this embodiment, before transmitting the control channel of the first type on the first set of physical resource blocks includes: the base station transmits a first higher layer signaling, the first higher layer signaling comprising a first set of resource blocks. I.e. the first set of physical resource blocks may be configured by a higher layer on the network side, and in particular may be configured by static signaling or dynamic signaling, which is beneficial to improving the flexibility of configuring the first set of resource blocks.

In an alternative implementation of this embodiment, the second set of physical resource blocks includes a first set of physical resource blocks and a third set of physical resource blocks.

In an alternative implementation of this embodiment, before the base station sends the second type of control channel on the second set of physical resource blocks, the base station includes: the base station transmits a second higher layer signaling, wherein the second higher layer signaling comprises the third resource block set. That is, the third physical resource block set may be configured by a higher layer on the network side, and may be configured by a higher layer static signaling configuration or a dynamic signaling configuration, which is beneficial to improving flexibility of configuring the third resource block set.

The control channel sending method provided by the embodiment can divide different types for the control channel, so that the sending of the control channel of different types is completed.

Fig. 8 is a schematic structural diagram of a UE according to another embodiment of the present invention. As shown in fig. 8, the UE of the present embodiment includes: a first detection unit 81 and a second detection unit 82.

A first detection unit 81 is configured to detect a control channel of a first type in a first set of physical resource blocks, where the first set of physical resource blocks includes at least one physical resource block pair.

A second detection unit 82 is configured to detect a second type of control channel in a second set of physical resource blocks, where the second set of physical resource blocks includes at least one physical resource block pair.

Further optionally, the second type of control channel candidate corresponds to at least two physical resource block pairs, and the at least two physical resource block pairs corresponding to the second type of control channel candidate are in the same PRG or the same RBG or the same subband.

In an optional implementation manner of this embodiment, at least one physical resource block pair included in the first physical resource block set is in a different precoding block group PRG or resource block group RBG or subband, so that channel estimation performance and demodulation performance may be improved.

In an optional implementation manner of the present embodiment, the UE of the present embodiment further includes: the second receiving unit 83. The second receiving unit 83 is configured to receive a first higher layer signaling, where the first higher layer signaling includes a first set of resource blocks. The second receiving unit 83 is connected to the first detecting unit 81 for providing the first set of resource blocks to the first detecting unit 81.

In an optional implementation manner of the present embodiment, the UE of the present embodiment further includes: a third acquisition unit 84 and/or a third receiving unit 85.

A third obtaining unit 84, configured to obtain the third resource block set according to the first resource block set and a preset function mapping relationship.

A third receiving unit 85, configured to receive a second higher layer signaling, where the second higher layer signaling includes a third set of resource blocks. The third acquisition unit 84 and the third receiving unit 85 are respectively connected to the second detection unit 82 for providing the second detection unit 82 with a third set of resource blocks.

The UE provided in this embodiment may be used to execute the flow of the control channel detection method, and the specific working principle is not described in detail in the description of the method embodiment.

The UE provided in this embodiment completes detection of the control channel, and when centralized transmission is adopted, the control channel candidates adopted in transmission are limited to one PRG or RBG or subband, so as to improve channel estimation performance and demodulation performance.

Fig. 9 is a schematic structural diagram of a base station according to another embodiment of the present invention. As shown in fig. 9, the base station of the present embodiment includes: a judging unit 91 and a second transmitting unit 92.

A judging unit 91, configured to judge a type of a control channel to be transmitted; a second transmitting unit 92, configured to transmit the control channel on the first set of physical resource blocks when the judging unit 91 judges that the control channel is the first type of control channel, or transmit the control channel on the second set of physical resource blocks when the judging unit 91 judges that the control channel is the second type of control channel. Wherein the first set of physical resource blocks comprises at least one physical resource block pair and the second set of physical resource blocks comprises at least one physical resource block pair.

In an optional implementation manner of this embodiment, the second sending unit 92 is further configured to send a first higher layer signaling, where the first higher layer signaling includes a first set of resource blocks, and the second sending unit 92 is specifically configured to send the first higher layer signaling to the UE before the second sending unit 92 sends the control channel.

In an alternative implementation manner of this embodiment, the second sending unit 92 is further configured to send second higher layer signaling, where the second higher layer signaling includes the third set of resource blocks. The second sending unit 92 is specifically configured to send second higher layer signaling to the UE before the second sending unit 92 sends the control channel.

The base station provided in this embodiment may be used to execute the flow of the above control channel transmission method, and the specific working principle is not described in detail in the description of the method embodiment.

The base station provided by the embodiment can divide different types for the control channels, completes the transmission of the control channels of different types, supports the limitation of the control channel candidates adopted by the transmission in one PRG or RBG or sub-band when adopting the centralized transmission, and improves the channel estimation performance and the demodulation performance.

Yet another embodiment of the present invention provides a UE including: at least one processor, and a memory; the memory is used for storing executable program codes, wherein the processor runs a program corresponding to the executable program codes by reading the executable program codes stored in the memory, and the processor is used for:

detecting a first type of control channel in a first set of physical resource blocks, the first set of physical resource blocks comprising at least one physical resource block pair;

a second type of control channel is detected in a second set of physical resource blocks, the second set of physical resource blocks comprising at least one physical resource block pair.

A further embodiment of the present invention provides a base station including: a processor and a transmitter.

And the processor is used for judging the type of the control channel to be transmitted. The transmitter is configured to transmit a control channel on a first set of physical resource blocks when the processor determines that the control channel is a first type of control channel, or transmit the control channel on a second set of physical resource blocks when the processor determines that the control channel is a second type of control channel, where the first set of physical resource blocks includes at least one physical resource block pair and the second set of physical resource blocks includes at least one physical resource block pair.

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

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The transmission method of the enhanced physical downlink control channel E-PDCCH is characterized by comprising the following steps:

Numbering a second resource group in the physical resource block set according to the corresponding relation between the first resource group and the second resource group, wherein the second resource group is a control channel unit (eCCE) group or a control channel candidate;

determining the number of the second resource group transmitting E-PDCCH;

mapping the E-PDCCH to a corresponding first resource group for transmission according to the determined number;

in each physical resource block pair, the number of the second resource group of the first type and the number of the first resource group corresponding to the second resource group of the first type have the following correspondence:

the numbers of the second resource groups of the first type are continuous in each physical resource block pair, and the number sequence of the second resource groups of at least one first type in each physical resource block pair is the same as the number sequence of the first resource group of the largest number corresponding to the second resource groups of the at least one first type respectively.

2. The method of claim 1, wherein the step of determining the position of the substrate comprises,

each physical resource block pair comprises N third resource groups, wherein N is a positive integer, each third resource group comprises M first resource groups, and in the physical resource block sets, the number set of the first resource group contained in each third resource group in one physical resource block pair is the same as the number set of the first resource group contained in one third resource group in each other physical resource block pair;

Numbering the second resource group according to the corresponding relation between the first resource group and the second resource group in the physical resource block set comprises: and each third resource group corresponds to one second resource group of the first type, and the second resource groups of the first type in each physical resource block pair are numbered sequentially according to the sequence from small to large or from large to small of the numbers of the physical resource block pairs.

3. The method according to claim 1 or 2, wherein numbering a second resource group in the set of physical resource blocks according to the correspondence of the first resource group and the second resource group comprises:

j＝K*m+(i mod K)，

wherein i is the number of the first resource group, i is an integer from 0 to L-1, L is the number of the first resource group in one of the physical resource block pairs, j is the number of the second resource group of the first type, M is the number of the physical resource block pair, K is the number of the second resource group of the first type in each of the physical resource block pairs, mod represents a modulo operation, the second resource group of the first type corresponds to M first resource groups belonging to the same physical resource block pair, and M is a positive integer.

4. The method of claim 1, wherein numbering a second set of resources in the set of physical resource blocks according to a correspondence of the first set of resources comprises:

j＝(i mod K)*K+m，

5. The method of claim 2, wherein the step of determining the position of the substrate comprises,

for a second resource group of a first type corresponding to a third resource group with the same number, the mapping relationship between the second resource group of the first type in one physical resource block pair and the first resource group contained in the second resource group is cyclic shift of the mapping relationship between the second resource group of the first type in each other physical resource block pair and the first resource group contained in the second resource group.

6. The method according to any one of claims 1 to 5, wherein the second resource group of the first type in the set of physical resource blocks is a resource group employing a centralized transmission of the E-PDCCH; and the second resource group of the second type in the physical resource block set is a resource group for transmitting the E-PDCCH in a discrete mode.

7. The method for receiving the E-PDCCH of the enhanced physical downlink control channel is characterized by comprising the following steps:

determining the number of the second resource group transmitting E-PDCCH;

receiving a second resource group transmitting E-PDCCH on at least one first resource group and a pilot port;

8. The method of claim 7, wherein the step of determining the position of the probe is performed,

9. The method according to claim 7 or 8, wherein numbering a second resource group in the set of physical resource blocks according to the correspondence of the first resource group and the second resource group comprises:

j＝K*m+(i mod K)，

10. The method of claim 7, wherein numbering a second set of resources in the set of physical resource blocks according to a correspondence of the first set of resources comprises:

j＝(i mod K)*K+m，

11. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

12. The method according to any of claims 7 to 11, wherein the second resource group of the first type in the set of physical resource blocks is a resource group employing a centralized transmission of the E-PDCCH; and the second resource group of the second type in the physical resource block set is a resource group for transmitting the E-PDCCH in a discrete mode.

13. An apparatus for transmitting an enhanced physical downlink control channel E-PDCCH, comprising:

a transceiver for transceiving signals;

a processor for performing the method according to any of claims 1-6.

14. An apparatus for receiving an enhanced physical downlink control channel E-PDCCH, comprising:

a transceiver for transceiving signals;

a processor for performing the method according to any of claims 7-12.

15. Transmission apparatus of an enhanced physical downlink control channel, E-PDCCH, characterized by comprising a memory device storing computer instructions and a processor for executing the method according to any of claims 1-6 when said computer instructions are invoked by the processor.

16. An apparatus for receiving an enhanced physical downlink control channel, E-PDCCH, comprising a memory device storing computer instructions and a processor for performing the method of any of claims 7-12 when the processor invokes the computer instructions.

17. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1-12.