CN102711253A - E-PDCCH (Enhanced-Physical Downlink Control Channel) resource mapping method and device therefor - Google Patents
E-PDCCH (Enhanced-Physical Downlink Control Channel) resource mapping method and device therefor Download PDFInfo
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Abstract
The invention discloses an E-PDCCH (Enhanced-Physical Downlink Control Channel) resource mapping method and a device for E-PDCCH resource mapping. With the adoption of the technical scheme of the embodiment, in a process of configuring a time-frequency resource (at least two PRB (Physical Resource Block) pairs) for transmitting an E-PDCCH to terminal equipment, the transmission of the E-PDCCH can be carried out in a non-interweaving manner through a control time frequency resource unit (E-CCE (Enhanced-Control Channel Element) formed by a plurality of continuous time frequency resource groups (REGs (Resource Element Groups)), and an E-CCE formed by connecting a plurality of the REGs between the two PRB pairs through adopting a cascaded manner, so that the resource mapping problem of transmission in the non-interweaving manner when one PRB pair contains E-CCEs with the quantity being non-integer is solved, and a resource configuration scheme in an E-PDCCH transmission process is flexible, a system resource is sufficiently utilized and the transmission efficiency of the E-PDCCH is improved.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to method for mapping resource and the device of a kind of E-PDCCH.
Background technology
In LTE (Long Term Evolution, Long Term Evolution) Rel-8/9/10 system, PDCCH (Physical Downlink Control Channel; Physical Downlink Control Channel) in each wireless sub-frame, send, as shown in Figure 1, it takies top n OFDM (the Orthogonal Frequency Division Multiplexing of a sub-frame; OFDM) symbol transmission, wherein, the possible value of N is 1; 2,3,4; And N=4 only allows to appear in the system that system bandwidth is 1.4MHz, claims that here top n OFDM symbol is " traditional P DCCH zone ".
The control area of transmission PDCCH is CCE (the Control Channel Element by logical partitioning in the LTE Rel-8/9/10 system; The control channel unit) constitutes; Wherein, a CCE is made up of 9 REG (Resource Element Group, resource unit group).REG is made up of adjacent 4 RE (Resource Element, Resource Unit) on identical on the time domain, the frequency domain, and the RE that wherein forms REG does not comprise the RE that is used to transmit reference symbol (Reference Signal, reference signal).The definition of concrete REG is as shown in Figure 2.
It is unit that the transmission of DCI (Downlink Control Information, Downlink Control Information) also is based on CCE, to a UE (User Equipment; Subscriber equipment, i.e. user terminal) a DCI can in the continuous in logic CCE of M, send, the possible value of M is 1 in the LTE system; 2; 4,8, be called CCE polymerization grade (Aggregation Level).UE carries out the PDCCH blind check in the control area; Whether search exists the PDCCH to its transmission; RNTI (the Radio Network Temporary Identity of this UE is promptly used in blind check; Radio Network Temporary Identifier) to the trial of decoding of different DCI forms and CCE polymerization grade,, then receives DCI to this UE if decoding is correct.LTE UE each descending sub frame in DRX (Discontinuous Reception, discontinuous reception) state all need carry out blind check to the control area, search PDCCH.
In LTE Rel-10 system, defined the Physical Downlink Control Channel (R-PDCCH that is used for Relay (relaying) system; Be Relay-PDCCH); It takies PDSCH (Physical Downlink Shared Channel; Physical Downlink Shared Channel) zone, R-PDCCH and PDSCH resource structures figure are as shown in Figure 3, and wherein R-PDCCH is used for the base station to the Relay control channel.
Wherein the resource that takies of R-PDCCH is through the high-level signaling configuration.The PRB pair that it takies (Physical Resource Block pair, Physical Resource Block to) resource can be continuous also can be discontinuous.In the definition of the search volume of R-PDCCH, R-PDCCH does not comprise the common search space, has only the special-purpose R-PDCCH search volume of Relay.Its DL grant (Downlink grant, descending scheduling permission) and UL grant (Uplink grant, uplink scheduling permission) transmit through the mode of TDM (Time Division Multiplexed, time division multiplexing).
DL grant transmits in first time slot.In first time slot, Relay detects a DCI format 1A and a DCI format relevant with transmission mode.
UL grant transmits in second time slot.In second time slot, Relay detects a DCI format 0 and a DCI format relevant with transmission mode.
Simultaneously, in the transmission of R-PDCCH, having defined two kinds of transmission meanss, is respectively pattern and the non-pattern that interweaves that interweaves.
The pattern that interweaves, the definition of wherein continuing to use the PDCCH in the LTE Rel-8/9/10 system, the polymerization grade is unit with CCE, and wherein each CCE is made up of 9 REG, and wherein the mode that interweaves that defines among the PDCCH is continued to use in the mapping between CCE and the REG;
The non-mode that interweaves, the unit of its polymerization grade is PRB (Physical Resource Block, a Physical Resource Block), wherein the resource that takies of the candidate channel in the search volume and the order of PRB have fixing mapping relations.
In the E-PDCCH of LTE Rel-11 (Enhanced PDCCH, the PDCCH of enhancing) discussed, the running time-frequency resource that E-PDCCH takies wherein, had the definition of following several kinds of control channel resources through the high-level signaling configuration:
Comprise an integer E-CCE (Enhanced CCE, the CCE of enhancing) among the PRB pair, the mapping relations between its RE and the E-CCE are as shown in Figure 4.
An E-CCE has a plurality of E-REG (Enhanced REG, the REG of enhancing) to form, and wherein E-REG can be identical with the definition of REG, also can be different.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem:
In localized (part) transmission mode (supporting the wave beam forming transmission) for E-PDCCH; Existing technical scheme always defines based on the mode that comprises an integer E-CCE among the PRB pair; Processing procedure in the application scenarios of reality limits; Be not easy to the flexible transmission of information, can not support the transmission mode of localized to greatest extent.
Summary of the invention
The embodiment of the invention provides method for mapping resource and the device of a kind of E-PDCCH, transmits in order to the PRB pair that strides that realizes E-CCE, thereby solves the problem of in a PRB pair, carrying out the transmission of a non-integer E-CCE.
On the one hand, the method for mapping resource of a kind of E-PDCCH that the embodiment of the invention provided comprises:
The running time-frequency resource that is used to transmit E-PDCCH of said terminal equipment is given in the base station through high-level signaling notice terminal equipment configuration;
Said base station adopts the non-mode that interweaves to send E-PDCCH to said terminal equipment at the said running time-frequency resource that is used for transmitting E-PDCCH;
Wherein, The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
On the other hand, a kind of base station that the embodiment of the invention provided comprises:
Configuration module is used for through the running time-frequency resource that be used to transmit E-PDCCH of high-level signaling notice terminal equipment configuration to said terminal equipment;
Sending module is used for the running time-frequency resource that is used to transmit E-PDCCH said, adopts the non-mode that interweaves to send E-PDCCH to said terminal equipment;
Wherein, The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
On the other hand, the method for mapping resource of the another kind of E-PDCCH that the embodiment of the invention provided comprises:
Terminal equipment receives the running time-frequency resource that is used to transmit E-PDCCH that base station configuration is given said terminal equipment through high-level signaling;
Said terminal equipment receives said base station and adopts the non-E-PDCCH that mode is sent that interweaves at the said running time-frequency resource that is used for transmitting E-PDCCH;
Wherein, The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
On the other hand, a kind of terminal equipment that the embodiment of the invention provided comprises:
Configuration module is used for receiving the running time-frequency resource that is used to transmit E-PDCCH that base station configuration is given said terminal equipment through high-level signaling;
Receiver module is used for the running time-frequency resource that is used to transmit E-PDCCH said, receives said base station and adopts the non-E-PDCCH that mode is sent that interweaves;
Wherein, The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; Give the running time-frequency resource that is used for transmitting E-PDCCH (at least two PRB pair) of terminal equipment in configuration; Can be through the control running time-frequency resource unit of being formed by a plurality of continuous running time-frequency resource group (REG) in each PRB pair (E-CCE); And the E-CCE that a plurality of REG forms that is connected of the mode that adopts cascade between two PRB pair, adopt the non-mode that interweaves to carry out the transmission of E-PDCCH, thereby; Solved comprise among the PRB pair be not integer E-CCE the time the resource mapping problems of non-interlace mode transmission; Make the resource allocation proposal flexibility in the E-PDCCH transmission course, made full use of system resource, improved the efficiency of transmission of E-PDCCH.
Description of drawings
Fig. 1 is the multiplexing sketch map that concerns of control area and data area in descending sub frame in the existing LTE Rel-8/9/10 system;
Fig. 2 is the sketch map of REG in the existing LTE Rel-8/9/10 system;
Fig. 3 is the resource structures figure of R-PDCCH and PDSCH in the existing LTE Rel-10 system;
Fig. 3 is the mapping relations sketch map between RE and the E-CCE in the existing LTE Rel-11 system;
Fig. 5 is the schematic flow sheet of the method for mapping resource of a kind of E-PDCCH that the embodiment of the invention proposed;
Fig. 6 is that a kind of that the embodiment of the invention proposed selects RE to form the sketch map of E-REG according to the time domain principle of priority;
Fig. 7 is that a kind of that the embodiment of the invention proposed selects RE to form the sketch map of E-REG according to the frequency domain principle of priority;
Fig. 8 is the sketch map of a kind of concrete application scenarios that the embodiment of the invention proposed;
The sketch map of E-CCE that Fig. 9 is proposed for the embodiment of the invention one and the mapping of E-REG resource;
The mapping sketch map of E-CCE on physical resource that Figure 10 is proposed for the embodiment of the invention one;
The sketch map of E-CCE that Figure 11 is proposed for the embodiment of the invention two and the mapping of E-REG resource;
The mapping sketch map of E-CCE on physical resource that Figure 12 is proposed for the embodiment of the invention two;
Figure 13 is the structural representation of a kind of base station that the embodiment of the invention proposed;
Figure 14 is the structural representation of a kind of terminal equipment that the embodiment of the invention proposed.
Embodiment
Of background technology, in order to promote LTE-A (Long Term Evolution Advanced, senior Long Term Evolution) systematic function, enlarge the PDCCH capacity, in the Rel-11 version, introduced E-PDCCH.Standard discussion has at present confirmed that E-PDCCH will support wave beam forming transmission (corresponding to the localized transmission mode) and divide collection transmission (corresponding to the distributed transmission mode) two kinds of patterns, is applied to different scene.But such scheme always defines based on the mode that comprises an integer E-CCE among the PRB pair, and the processing procedure in the application scenarios of reality is limited, and is not easy to the flexible transmission of information.
In order to overcome such defective; The embodiment of the invention has proposed the method for mapping resource of a kind of E-PDCCH, transmits in order to the PRB pair that strides that realizes E-CCE, promptly in a PRB pair, carries out the transmission of a non-integer E-CCE; Thereby, can effectively support the transmission mode of localized.
As shown in Figure 5, be the schematic flow sheet of the method for mapping resource of a kind of E-PDCCH that the embodiment of the invention proposed, this method specifically may further comprise the steps:
The running time-frequency resource that is used to transmit E-PDCCH of said terminal equipment is given in step S501, base station through high-level signaling notice terminal equipment configuration.
Wherein, the said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair, comprises a plurality of running time-frequency resource groups among said at least two PRB pair.In the present embodiment, the running time-frequency resource group specifically can be called E-REG (Enhanced REG, the REG of enhancing), describes for convenient, and below, with the appellation of E-REG replacement running time-frequency resource group, such title changes can't influence protection scope of the present invention.
Need to prove that at least two above-mentioned PRB pair are specially at least two PRB pair that are used for the E-PDCCH transmission adjacent on the position of the running time-frequency resource of physics.
And at least two the above-mentioned distributions of PRB pair on frequency domain, then can be continuous, also can be discontinuous.But,, in the selection of PRB pair, preferably can be chosen in the PRB pair of adjacent in logic support identical traffic pattern in order better to realize the transmission of follow-up E-PDCCH.
In concrete enforcement scene, the concrete quantity of above-mentioned PRB pair, and the selection of frequency domain position can select according to actual needs, such variation does not influence the protection range of the embodiment of the invention.
What need further specify is; For the ease of the pairing E-CCE of follow-up E-PDCCH (Enhanced CCE; The CCE that strengthens) cascade transmission; Included a plurality of E-REG need number through cascade system among at least two above-mentioned PRB pair, thereby, make a plurality of E-REG included among at least two PRB pair become the running time-frequency resource set that E-PDCCH is transmitted in continuous can be used for.
In the application scenarios of reality; Above-mentioned E-REG; Be specially through removing reference signal, legacy (leaving over) PDCCH, PBCH (Physical Broadcast Channel; Physical Broadcast Channel), a plurality of running time-frequency resources unit outside the shared running time-frequency resource unit of PSS (Primary Synchronization Signal, master sync signal) or SSS (Secondary Synchronization Signal, auxiliary synchronous signal) is formed.
Wherein, above-mentioned reference signal can comprise CRS, DMRS, CSI-RS (Channel State Information Reference Signal, channel state information reference signals), muting (quiet) CSI-RS at least.
Consider unification with prior art; The quantity of included running time-frequency resource unit (being RE) can preferably be set to 4 among the above-mentioned E-REG, certainly; Can be set to other numerical value according to actual needs, such variation does not influence protection scope of the present invention yet.
What need further specify is, the RE that above-mentioned E-REG is included specifically can adopt any one following method to select:
Method one, in corresponding PRB pair, selected according to the time domain principle of priority.
As shown in Figure 6, be a kind of sketch map that the embodiment of the invention proposed according to time domain principle of priority selection RE composition E-REG, in this embodiment, each E-REG comprises 4 RE.
Method two, in corresponding PRB pair, selected according to the frequency domain principle of priority.
As shown in Figure 7, be a kind of sketch map that the embodiment of the invention proposed according to frequency domain principle of priority selection RE composition E-REG, in this embodiment, each E-REG comprises 4 RE.
Method three, in corresponding PRB pair, selected according to preset pattern (general layout) principle.
In the application scenarios of reality, can confirm the system of selection of RE according to the needs of reality, such variation does not influence protection scope of the present invention.
Step S502, said base station adopt the non-mode that interweaves to send E-PDCCH to said terminal equipment at the said running time-frequency resource that is used for transmitting E-PDCCH.
Wherein, The running time-frequency resource of the E-PDCCH that is transmitted comprises a plurality of control running time-frequency resources unit, and in the present embodiment, control running time-frequency resource unit specifically can be called E-CCE; Describe for convenient; Below, with the appellation of E-CCE replacement control running time-frequency resource unit, such title changes can't influence protection scope of the present invention.
Concrete, each E-CCE and aforesaid E-REG comprise two kinds of mapping modes:
A plurality of continuous E-REG in mode one, each PRB pair forms E-CCE.
Such mode is to form E-CCE through the inner E-REG of a PRB pair, and is similar with the processing thinking of prior art, repeats no more at this.
A plurality of E-REG that the mode of employing cascade is connected between two, two PRB pair of mode form E-CCE.
Such mode be through adjacent two of logic (under specific situation; Even can be for a plurality of) E-REG of PRB pair is common forms an E-CCE; The PRB pair that strides that has promptly realized E-CCE transmits, through this mode, and several E-REG several E-REGs mutually cascade forward that previous PRB pair is last with next PRB pair; E-CCE of common composition; Through such mode, PRB pair can realize the transmission of a non-integer E-CCE, has made full use of according to not being used to the REG that CCE transmits because be not enough to constitute a complete CCE among each PRB pair in the prior art; Can not improve the efficiency of transmission of E-PDCCH in the waste that forms valuable running time-frequency resource.
Consider the unification with prior art, form the quantity of the E-REG of mapping relations with above-mentioned E-CCE, can preferably be set to 9, certainly, can be set to other numerical value according to actual needs yet, such variation does not influence protection scope of the present invention.
Corresponding, in terminal equipment side, need to receive the running time-frequency resource that is used to transmit E-PDCCH that base station configuration is given this terminal equipment; And in such running time-frequency resource; Receive said base station and adopt the non-E-PDCCH that mode is sent that interweaves, wherein, about the configuration mode and the composition structure of running time-frequency resource; And in the E-PDCCH transmission course; Mapping relations between E-CCE and the E-REG all can be with reference to the explanation among abovementioned steps S501 and the step S502, repeated description no longer, and the handling process of corresponding terminal device side also no longer specifies at this.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; Give the running time-frequency resource that is used for transmitting E-PDCCH (at least two PRB pair) of terminal equipment in configuration; Can be through the control running time-frequency resource unit of being formed by a plurality of continuous running time-frequency resource group (REG) in each PRB pair (E-CCE); And the E-CCE that a plurality of REG forms that is connected of the mode that adopts cascade between two PRB pair, adopt the non-mode that interweaves to carry out the transmission of E-PDCCH, thereby; Solved comprise among the PRB pair be not integer E-CCE the time the resource mapping problems of non-interlace mode transmission; Make the resource allocation proposal flexibility in the E-PDCCH transmission course, made full use of system resource, improved the efficiency of transmission of E-PDCCH.
Below, the application scenarios in conjunction with concrete describes the technical scheme that the embodiment of the invention proposed.
In concrete application scenarios, as shown in Figure 8, discontinuous PRB pair is as the running time-frequency resource of E-PDCCH transmission on system has been terminal equipment configuration 4 frequency domains.
In follow-up several embodiment, adopt different PRB pair selection schemes to describe respectively.
One, 4 PRB pair of embodiment all supports the transmission mode of localized, and base station selected wherein two transmission of carrying out E-PDCCH.
Accordingly, based on above-mentioned scene explanation, in the present embodiment; The selected PRB pair that is used for to terminal equipment transmission E-PDCCH in base station can be (the PRB pair 0 of Fig. 8; PRB pair 1), perhaps (PRB pair 1, PRB pair 2); Perhaps (PRB pair 2, PRB pair 3).
Consider the configuration (can not select for use the shared RE of legacy PDCCH to carry out the transmission of E-PDCCH) of the OFDM symbol that legacy PDCCH takies in the supposing the system, can comprise 19 E-REG among the PRB pair.
Each E-REG is set is made up of 4 RE, each E-CCE is made up of 9 E-REG.
Then with (the PRB pair 0 among Fig. 8; PRB pair 1) be example, as shown in Figure 9, the sketch map of E-CCE that is proposed for the embodiment of the invention one and the mapping of E-REG resource; Wherein, each E-REG among PRB pair 0 and the PRB pair 1 numbers through cascade system.
Wherein, E-CCE 0, E-CCE 1 and E-CCE 3 all are made up of the E-REG among the PRB pair; Be continuous E-REG 0 to the E-REG 8 composition E-CCE 0 among the PRB pair 0; Continuous E-REG 9 to E-REG 17 among the PRB pair 0 forms E-CCE 1, and the continuous E-REG 27 to E-REG 35 among the PRB pair 1 forms E-CCE 3.
But; 2 of E-CCE are by (the E-REG 18 among the PRB pair 0 of the E-REG among two PRB pair; And the continuous E-REG among the PRB pair 0 19 to E-REG 26) constitute, promptly E-REG among the PRB pair 0 and the E-REG among the PRB pair 1 constitute an E-CCE through the mode of cascade.
According to above-mentioned mapping relations, shown in figure 10, be the mapping sketch map of E-CCE on physical resource that the embodiment of the invention one is proposed, wherein E-CCE 2 is made up of with the part running time-frequency resource among the PRB pair 1 PRB pair 0.
Two, 4 PRB pair of embodiment all support the transmission mode of localized, and base station selected wherein 3 transmission of carrying out E-PDCCH.
Accordingly, based on above-mentioned scene explanation, in the present embodiment; The selected PRB pair that is used for to terminal equipment transmission E-PDCCH in base station can be Fig. 8 (PRB pair 0, PRB pair 1, PRB pair 2); Perhaps (PRB pair 1, PRB pair 2, PRB pair 3).
Consider the configuration (can not select for use the shared RE of legacy PDCCH to carry out the transmission of E-PDCCH) of the OFDM symbol that legacy PDCCH takies in the supposing the system, can comprise 19 E-REG among the PRB pair.
Equally, each E-REG is set is made up of 4 RE, each E-CCE is made up of 9 E-REG.
Then with (the PRB pair 0 among Fig. 8; PRB pair 1; PRB pair 2) be example, shown in figure 10, the sketch map of E-CCE that is proposed for the embodiment of the invention two and the mapping of E-REG resource; Wherein, each E-REG among PRB pair 0, PRB pair 1 and the PRB pair 2 numbers through cascade system.
Wherein, E-CCE 0, E-CCE 1, E-CCE 3 and E-CCE 5 all are made up of the E-REG among the PRB pair; Be continuous E-REG 0 to the E-REG 8 composition E-CCE 0 among the PRB pair 0; Continuous E-REG 9 to E-REG 17 among the PRB pair 0 forms E-CCE 1, and the continuous E-REG 27 to E-REG 35 among the PRB pair 1 forms E-CCE 3, and the continuous E-REG 45 to E-REG 53 among the PRB pair 2 forms E-CCE 5.
But; E-CCE 2 and 4 of E-CCE are made up of the E-REG among two PRB pair; Wherein, E-REG 18 and the continuous E-REG among the PRB pair 0 19 to E-REG 26 among the PRB pair 0 form E-CCE 2, and the continuous E-REG 38 to E-REG 44 among the E-REG 36 among the PRB pair 1, E-REG 37 and the PRB pair 2 forms E-CCE 4, i.e. E-REG among the PRB pair 0 and the E-REG among the PRB pair 1; And the E-REG among E-REG among the PRB pair 1 and the PRB pair 2, the mode through cascade has constituted E-CCE respectively.
According to above-mentioned mapping relations; Shown in figure 12; The mapping sketch map of E-CCE on physical resource that is proposed for the embodiment of the invention two; Wherein, E-CCE 2 is made up of with the part running time-frequency resource among the PRB pair 1 PRB pair 0, and E-CCE 4 is made up of with the part running time-frequency resource among the PRB pair 2 PRB pair 1.
Two embodiment based on above can find out that applied PRB pair quantity can be adjusted according to actual needs in the method for mapping resource of the E-PDCCH that the embodiment of the invention proposed, and such variation does not influence protection scope of the present invention.
Embodiment three, and in 4 PRB pair, PRB pair 0 and PRB pair 2 support the transmission mode of localized, and PRB pair 1 and PRB pair 3 support the transmission mode of distributed, and base station selected wherein 2 transmission of carrying out E-PDCCH.
Accordingly, based on above-mentioned scene explanation, in the present embodiment, the selected PRB pair that is used for to terminal equipment transmission E-PDCCH in base station is Fig. 8 (PRB pair 0, PRB pair 2).
The mapping relations of corresponding E-CCE and E-REG are referring to the explanation among the aforesaid embodiment one; Repeat no more at this, the difference of present embodiment and aforesaid embodiment one is because PRB pair supports the difference of the PRB pair selection scheme that different transmission modes is brought.
Such processing rule belongs to protection scope of the present invention equally.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; Give the running time-frequency resource that is used for transmitting E-PDCCH (at least two PRB pair) of terminal equipment in configuration; Can be through the control running time-frequency resource unit of being formed by a plurality of continuous running time-frequency resource group (REG) in each PRB pair (E-CCE); And the E-CCE that a plurality of REG forms that is connected of the mode that adopts cascade between two PRB pair, adopt the non-mode that interweaves to carry out the transmission of E-PDCCH, thereby; Solved comprise among the PRB pair be not integer E-CCE the time the resource mapping problems of non-interlace mode transmission; Make the resource allocation proposal flexibility in the E-PDCCH transmission course, made full use of system resource, improved the efficiency of transmission of E-PDCCH.
In order to realize the technical scheme of the embodiment of the invention, the embodiment of the invention also provides a kind of base station, and its structural representation is shown in figure 13, comprises at least:
Sending module 132 is used for the running time-frequency resource that is used to transmit E-PDCCH said, adopts the non-mode that interweaves to send E-PDCCH to said terminal equipment;
Wherein, The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
Further, said at least two the included PRB pair of running time-frequency resource that are used for transmitting E-PDCCH are specially at least two PRB pair that are used for the E-PDCCH transmission adjacent on the position of the running time-frequency resource of physics.
In the application scenarios of reality, above-mentioned base station also comprises processing module 133, is used for a plurality of running time-frequency resource groups that said at least two PRB pair are included and numbers through cascade system.
On the other hand, the embodiment of the invention also provides a kind of terminal equipment, and its structural representation is shown in figure 14, comprises at least:
Configuration module 141 is used for receiving the running time-frequency resource that is used to transmit E-PDCCH that base station configuration is given said terminal equipment through high-level signaling;
Receiver module 142 is used for the running time-frequency resource that is used to transmit E-PDCCH said, receives said base station and adopts the non-E-PDCCH that mode is sent that interweaves;
Wherein, The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
In above-mentioned base station and terminal equipment; Configuration mode and composition structure about running time-frequency resource; And in the E-PDCCH transmission course, the mapping relations between E-CCE and the E-REG all can be with reference to the explanation among abovementioned steps S501 and the step S502, at this repeated description no longer.
Compared with prior art, the technical scheme that the embodiment of the invention proposed has the following advantages:
Through using the technical scheme of the embodiment of the invention; Give the running time-frequency resource that is used for transmitting E-PDCCH (at least two PRB pair) of terminal equipment in configuration; Can be through the control running time-frequency resource unit of being formed by a plurality of continuous running time-frequency resource group (REG) in each PRB pair (E-CCE); And the E-CCE that a plurality of REG forms that is connected of the mode that adopts cascade between two PRB pair, adopt the non-mode that interweaves to carry out the transmission of E-PDCCH, thereby; Solved comprise among the PRB pair be not integer E-CCE the time the resource mapping problems of non-interlace mode transmission; Make the resource allocation proposal flexibility in the E-PDCCH transmission course, made full use of system resource, improved the efficiency of transmission of E-PDCCH.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product is stored in the storage medium, comprise some instructions with so that a station terminal equipment (can be mobile phone, personal computer; Server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be looked protection scope of the present invention.
Claims (22)
1.
The method for mapping resource of a kind of enhanced physical down control channel E-PDCCH is characterized in that, this method comprises:
The running time-frequency resource that is used to transmit E-PDCCH of said terminal equipment is given in the base station through high-level signaling notice terminal equipment configuration;
Said base station adopts the non-mode that interweaves to send E-PDCCH to said terminal equipment at the said running time-frequency resource that is used for transmitting E-PDCCH;
wherein; The said running time-frequency resource that is used to transmit E-PDCCH comprises that at least two Physical Resource Block are to PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
2.
The method of claim 1 is characterized in that, said at least two the included PRB pair of running time-frequency resource that are used for transmitting E-PDCCH are specially:
are adjacent at least two PRB pair that are used for the E-PDCCH transmission on the position of the running time-frequency resource of physics.
3.
method as claimed in claim 2 is characterized in that, said at least two PRB pair are continuous on frequency domain, or discontinuous.
4.
the method for claim 1 is characterized in that, included a plurality of running time-frequency resource groups among said at least two PRB pair are specifically numbered through cascade system.
5.
The method of claim 1 is characterized in that, said running time-frequency resource group is specially:
through except that reference signal, leave over that a plurality of running time-frequency resources unit the shared running time-frequency resource unit of Physical Downlink Control Channel legacy PDCCH, Physical Broadcast Channel PBCH, master sync signal PSS or auxiliary synchronous signal SSS formed.
6.
Method as claimed in claim 5 is characterized in that, said reference signal comprises at least:
public reference signal CRS, demodulated reference signal DMRS, channel state information reference signals CSI-RS, quiet channel state information reference signals muting CSI-RS.
7.
method as claimed in claim 5 is characterized in that the quantity of the running time-frequency resource unit that said running time-frequency resource group is included is specially 4.
8.
Method as claimed in claim 5 is characterized in that, the running time-frequency resource unit that said running time-frequency resource group is included is specially:
In corresponding PRB pair, selected according to the time domain principle of priority; Or,
In corresponding PRB pair, selected according to the frequency domain principle of priority; Or,
are in corresponding PRB pair, and are selected according to preset general layout pattern principle.
9.
the method for claim 1 is characterized in that the quantity of the running time-frequency resource group that said control running time-frequency resource unit is included is specially 9.
?
10.
A kind of base station is characterized in that, comprising:
Configuration module is used for through the running time-frequency resource that be used to transmit E-PDCCH of high-level signaling notice terminal equipment configuration to said terminal equipment;
Sending module is used for the running time-frequency resource that is used to transmit E-PDCCH said, adopts the non-mode that interweaves to send E-PDCCH to said terminal equipment;
wherein; The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
11.
Base station as claimed in claim 10 is characterized in that, said at least two the included PRB pair of running time-frequency resource that are used for transmitting E-PDCCH are specially:
are adjacent at least two PRB pair that are used for the E-PDCCH transmission on the position of the running time-frequency resource of physics.
12.
Base station as claimed in claim 10 is characterized in that, also comprises:
processing module is used for a plurality of running time-frequency resource groups that said at least two PRB pair are included and numbers through cascade system.
?
13.
The method for mapping resource of a kind of E-PDCCH is characterized in that, this method comprises:
Terminal equipment receives the running time-frequency resource that is used to transmit E-PDCCH that base station configuration is given said terminal equipment through high-level signaling;
Said terminal equipment receives said base station and adopts the non-E-PDCCH that mode is sent that interweaves at the said running time-frequency resource that is used for transmitting E-PDCCH;
wherein; The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
14.
Method as claimed in claim 13 is characterized in that, said at least two the included PRB pair of running time-frequency resource that are used for transmitting E-PDCCH are specially:
are adjacent at least two PRB pair that are used for the E-PDCCH transmission on the position of the running time-frequency resource of physics.
15.
method as claimed in claim 14 is characterized in that, said at least two PRB pair are continuous on frequency domain, or discontinuous.
16.
method as claimed in claim 13 is characterized in that, included a plurality of running time-frequency resource groups among said at least two PRB pair are specifically numbered through cascade system.
17.
Method as claimed in claim 13 is characterized in that, said running time-frequency resource group is specially:
are formed through a plurality of running time-frequency resources unit except that the shared running time-frequency resource unit of reference signal, legacy PDCCH, PBCH, PSS or SSS.
18.
Method as claimed in claim 17 is characterized in that, said reference signal comprises at least:
CRS、DMRS、CSI-RS、muting?CSI-RS。
19.
method as claimed in claim 17 is characterized in that the quantity of the running time-frequency resource unit that said running time-frequency resource group is included is specially 4.
20.
Method as claimed in claim 17 is characterized in that, the running time-frequency resource unit that said running time-frequency resource group is included is specially:
In corresponding PRB pair, selected according to the time domain principle of priority; Or,
In corresponding PRB pair, selected according to the frequency domain principle of priority; Or,
are in corresponding PRB pair, and are selected according to preset general layout pattern principle.
21.
method as claimed in claim 13 is characterized in that the quantity of the running time-frequency resource group that said control running time-frequency resource unit is included is specially 9.
?
22.
A kind of terminal equipment is characterized in that, comprising:
Configuration module is used for receiving the running time-frequency resource that is used to transmit E-PDCCH that base station configuration is given said terminal equipment through high-level signaling;
Receiver module is used for the running time-frequency resource that is used to transmit E-PDCCH said, receives said base station and adopts the non-E-PDCCH that mode is sent that interweaves;
wherein; The said running time-frequency resource that is used to transmit E-PDCCH comprises at least two PRB pair; Comprise a plurality of running time-frequency resource groups among said at least two PRB pair; The running time-frequency resource of said E-PDCCH comprises a plurality of control running time-frequency resources unit, and each controls the running time-frequency resource unit respectively by a plurality of continuous running time-frequency resource group in each PRB pair, or a plurality of running time-frequency resource groups that adopt the mode of cascade to be connected between two PRB pair are formed.
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