CN102594513B - Enhanced downlink control signal channel transmission method and device - Google Patents
Enhanced downlink control signal channel transmission method and device Download PDFInfo
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- CN102594513B CN102594513B CN201210074680.2A CN201210074680A CN102594513B CN 102594513 B CN102594513 B CN 102594513B CN 201210074680 A CN201210074680 A CN 201210074680A CN 102594513 B CN102594513 B CN 102594513B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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Abstract
The invention discloses an enhanced downlink control signal channel transmission method and an enhanced downlink control signal channel transmission device and relates to the communication technology. Time frequency resources are distributed for E-physical downlink control channel (E-PDCCH) according to the preset search space in a preset time frequency resource range in sub frames, so a terminal can obtain the time frequency resources capable of being used by E-PDCCH after receiving a management information base (MIB) transmitted by a physical broadcast channel (PBCH), further, the blind detection can be carried out on the corresponding time domain resources, and digital copyright identifiers (DCI) can be received on the E-PDCCH.
Description
Technical field
The present invention relates to the communication technology, particularly relate to a kind of transmission method and device of down control channel of enhancing.
Background technology
At Long Term Evolution (long term evolution, LTE) in system, Physical Downlink Control Channel (physical downlink control channel, PDCCH) send in each wireless sub-frame, and with Physical Downlink Shared Channel (physical downlink shared channel, PDSCH) time division multiplexing (time division multiplexing is formed, TDM) multiplexing relation, as shown in Figure 1, control area is for transmitting PDCCH, and data area is for transmitting PDSCH.PDCCH is by top n OFDM (the orthogonal frequency division multiplexing of a descending sub frame, OFDM) symbol sends, wherein the value of N can be 1,2,3 or 4, and N=4 only to allow to appear at system bandwidth be in the system of 1.4MHz.
Terminal receives master sync signal (primary synchronous signal, and auxiliary synchronous signals (secondary synchronous signal PSS), SSS) can cell initial search be completed after, obtain down-going synchronous and cell ID (cell ID).Center 1.4MHz frequency range in system bandwidth receives Physical Broadcast Channel (physical broadcast channel, PB CH) on Master Information Block (the master information block that transmits, MIB) information, thus reading system bandwidth, System Frame Number and physical mixed HARQ (automatic repeat request, ARQ) indicating channel (physical hybrid ARQ indictor channel, PHICH) configuration.Physical Control Format Indicator Channel (physical control format indicator channel can be determined based on system bandwidth and community ID, PCFICH) frequency domain resource position, thus receive control format instruction (control format indicator, CFI) OFDM (the orthogonal frequency divided multiplexing shared by PDCCH is determined, OFDM) symbolic number, thus determine the running time-frequency resource that PDCCH uses.Completed the concrete running time-frequency resource position of each PDCCH channel by blind Detecting, thus realize PDCCH reception, completion system information (system information, SI) contour level signaling scheduling information reads and corresponding information receives.
The control area of transmitting PDCCH in LTE system is by the control channel unit of logical partitioning (control channel element, CCE) form, wherein CCE have employed to the mapping of Resource Unit (resource element, RE) mode interweaved completely.The transmission of DCI is also unit based on CCE, for a subscriber equipment (user equipment, UE) a DCI can send in N number of continuous print CCE, in LTE system, the possible value of N is 1,2,4 or 8, is called CCE polymerization grade (aggregation level).
UE carries out PDCCH blind Detecting in control area, whether search exists the PDCCH sent for it, wherein, blind check is specially: wireless network temporary indentification (the radio network temporary identifier using this UE, RNTI) carry out decoding to different DCI format and CCE polymerization grade to attempt, if decoding is correct, then determines it is the DCI for this UE, and receive.In LTE system, UE each descending sub frame in discontinuous reception (discontinuous reception, DRX) state needs to carry out blind Detecting to its control area, search PDCCH.
In order to reach expansion capacity, frequency domain interference is coordinated, obtain the targets such as antenna gain, LTE version 11 (Release 11, R11) will carry out DCI transmission in PDSCH region, namely, the PDCCH (enhanced PDCCH, E-PDCCH) strengthened.A solution is: the PDCCH sending enhancing in the PDSCH territory while of retaining original PDCCH territory in descending sub frame.
As shown in Figure 2, original PDCCH territory still adopts existing transmission and reception technique, uses original PDCCH resource, and this part PDCCH territory is called legacy PDCCH (original PDCCH) territory.The PDCCH territory strengthened can use more advanced transmission and reception technique, precoding is adopted during as sent, based on user-specific reference signal (UE-specific reference signal during reception, UERS) detect, the running time-frequency resource taken beyond legacy PDCCH territory sends, use the part resource of original PDSCH, realize multiplexing with PDSCH by the mode of frequency division, this part PDCCH territory is called E-PDCCH territory.This E-PDCCH and PDSCH is realized multiplexing scheme be called FDM E-PDCCH by frequency division multiplexing (frequency divided multiplexing, FDM) mode.
When there is legacy PDCCH territory and E-PDCCH territory at the same time, if terminal possesses the ability receiving PDCCH and E-PDCCH simultaneously, then can pass through the scheduling of the PDCCH completion system information higher layer signalling message relevant with E-PDCCH configuration, thus ensure transmission and the reception of E-PDCCH.This type of E-PDCCH is called the E-PDCCH relying on legacy PDCCH.
On the one hand, along with machine type communication (machine type communication, MTC) fast development of business, the increasing limitation of traditional sensors network faces and challenge, be badly in need of sensor network and mobile communications network to combine, play mobile communication and cover the features such as wide, reliability is high, transmission delay is little.In order to meet the demand of MTC service, consideration is optimized system and transmission technology by the follow-up evolution system of LTE, to adapt to the less radio frequency band of MTC terminal support, less bandwidth processing ability, simpler multiple antennas disposal ability, more flexibly throughput capabilities and caching capabilities, simpler mobility, only to support the features such as PS territory.
The terminal of Bandwidth-Constrained cannot receive the PDCCH of full bandwidth transmission, cannot receive by the DCI of transmission on legacy PDCCH, therefore cannot receive the system information of being dispatched by legacy PDCCH and higher layer signalling message.Obviously, the E-PDCCH technology of dependence legacy PDCCH cannot realize the support to Bandwidth-Constrained MTC terminal.
On the other hand, in order to improve spectrum utilization efficiency and ensure that hot spot region covers, consider that non-backward compatible carrier waves improves in spectrum efficiency, unique advantage in AF panel, energy saving etc. under heterogeneous network, will be studied further in LTE-Advanced Release-11 (the LTE evolution version 11) stage about the new opplication scene of non-backward compatible carrier waves and detailed design plan.The carrier wave of expansion carrier wave and a kind of non-backward compatible, there is not legacy PDCCH in expansion carrier wave.The E-PDCCH technology relying on legacy PDCCH also cannot support that this type of carrier wave carries out work independent of other carrier waves.
Summary of the invention
The embodiment of the present invention provides a kind of downlink control channel transmission and device of enhancing, does not rely on legacy PDCCH reception E-PDCCH to make terminal.
A transmission method for the down control channel of enhancing, comprising:
Terminal is determined to receive E-PDCCH;
Terminal carries out blind Detecting to receive E-PDCCH by the search volume of presetting within the scope of the E-PDCCH running time-frequency resource determined.
A transmission method for the down control channel of enhancing, comprising:
Need send strengthen down control channel E-PDCCH time, within the scope of the running time-frequency resource preset in subframe by preset search volume be described E-PDCCH distribute running time-frequency resource;
Described E-PDCCH is sent to terminal.
A transmitting device for the down control channel of enhancing, comprising:
Determining unit, receives E-PDCCH for determining;
Receiving element, for carrying out blind Detecting to receive E-PDCCH by the search volume of presetting within the scope of the E-PDCCH running time-frequency resource determined.
A transmitting device for the down control channel of enhancing, comprising:
Resource allocation unit, for need send strengthen down control channel E-PDCCH time, within the scope of the running time-frequency resource preset in subframe by preset search volume be described E-PDCCH distribute running time-frequency resource;
Transmitting element, for sending described E-PDCCH to terminal.
The embodiment of the present invention provides a kind of downlink control channel transmission and device of enhancing, by being that E-PDCCH distributes running time-frequency resource by the search volume of presetting within the scope of the running time-frequency resource that presets in subframe, make terminal can know the running time-frequency resource that E-PDCCH may use after the MIB receiving PBCH transmission, thus blind Detecting can be carried out on corresponding running time-frequency resource, to receive DCI on E-PDCCH.
Accompanying drawing explanation
Fig. 1 is the multiplexing relation schematic diagram of control area and data area in descending sub frame in prior art;
Fig. 2 is the PDCCH structural representation of a kind of enhancing in prior art;
One of downlink control channel transmission flow chart of the enhancing that Fig. 3 provides for the embodiment of the present invention;
The downlink control channel transmission flow chart two of the enhancing that Fig. 4 provides for the embodiment of the present invention;
One of down control channel transmitting device structural representation of the enhancing that Fig. 5 provides for the embodiment of the present invention;
The down control channel transmitting device structural representation two of the enhancing that Fig. 6 provides for the embodiment of the present invention.
Embodiment
The embodiment of the present invention provides a kind of downlink control channel transmission and device of enhancing, by being that E-PDCCH distributes running time-frequency resource by the search volume of presetting within the scope of the running time-frequency resource that presets in subframe, make terminal can know the running time-frequency resource that E-PDCCH may use after the MIB receiving PBCH transmission, thus blind Detecting can be carried out on corresponding running time-frequency resource, to receive DCI on E-PDCCH.As shown in Figure 3, the transmission method of the down control channel of enhancing that the embodiment of the present invention provides comprises:
Step S301, terminal are determined to receive E-PDCCH;
Step S302, terminal carry out blind Detecting to receive E-PDCCH by the search volume of presetting within the scope of the E-PDCCH running time-frequency resource determined.
E-PDCCH is transmitted owing to using the running time-frequency resource in setting range, so terminal can when not receiving legacy PDCCH, within the scope of the E-PDCCH running time-frequency resource determined, carry out blind Detecting by the search volume of presetting, thus realize the reception of E-PDCCH.
In step S301, terminal is determined to receive E-PDCCH, specifically comprises:
Terminal is determined to receive E-PDCCH according to the information field being used to indicate E-PDCCH configuration received, and wherein, it is the E-PDCCH transmission not relying on legacy PDCCH that information field is used to indicate terminal E-PDCCH transmission means.Wherein, the information field that this down control channel E-PDCCH being used to indicate enhancing configures can be arranged in the MIB transmitted by PBCH.
Information field is generally 1 bit information, and such as, 0 expression system does not support the E-PDCCH transmission not relying on legacy PDCCH, and 1 represents that system support does not rely on the E-PDCCH transmission of legacy PDCCH.
When system does not support the E-PDCCH transmission not relying on legacy PDCCH, terminal does not carry out the reception of E-PDCCH; When system support does not rely on the E-PDCCH transmission of legacy PDCCH, the E-PDCCH transmission method that the terminal possessing E-PDCCH receiving ability can provide according to the embodiment of the present invention carries out the reception of E-PDCCH.
In the embodiment of the present invention, the search volume of presetting can be public search space, also can arrange search volume according to actual conditions.
Concrete, from time domain scale, the E-PDCCH time-domain resource scope determined can be: L1 ~ L2 OFDM symbol in subframe, wherein:
L1 can for the fixed value preset, and such as, L1 value can be set as 4, and now, E-PDCCH initial OFDM symbol numbering l=3, l are from 0 open numbering.
L1 also can set according to system bandwidth, such as, when the PRB number that system bandwidth comprises is less than or equal to 10, L1 value is 5, the now initial OFDM symbol numbering l=4 of E-PDCCH, when the PRB number comprised in system bandwidth is greater than 10, L1 value is 4, now the initial OFDM symbol numbering l=3 of E-PDCCH.
L2 is generally the fixed value preset, such as, at conventional cyclic prefix (cyclic prefix, CP) in common subframe, L2 value can be set as 7, represent front 1 slot transmission of E-PDCCH a subframe, L2 value also can be set as 14, represents that E-PDCCH transmits in 2 time slots of a subframe; In the common subframe of expansion CP, L2 value can be set as 6, and represent front 1 slot transmission of E-PDCCH a subframe, L2 value also can be set as 12, represents that E-PDCCH transmits in 2 time slots of a subframe; In special subframe, L2 depends on the OFDM symbol number that DwPTS comprises, and E-PDCCH time domain scale is terminate with the terminating symbol of descending pilot frequency time slot (downlink pilot time slot, DwPTS).
Terminal receives at needs and adopts system information radio network temporary identifier (system information-radio network temporary identity, SI-RNTI) scrambling for schedule system information block type 1 (system information block1, during E-PDCCH SIB1), blind Detecting and reception can be carried out further in the subframe preset.Such as, can be set in the transmission carrying out this E-PDCCH in the subframe 5 of even number radio frames, and transmission is set in the radio frames of SFN mod 8=0 first, wherein SFN is System Frame Number, and the mib information transmitted by receiving PBCH can obtain.
Further, from frequency domain, the E-PDCCH frequency domain resource scope determined can be: M the PRB made an appointment in subframe, M is the fixed value of making an appointment or the value indicated by the Physical Control Format Indicator Channel E-PCFICH strengthened, M value is from [3,6] in, value is better, and usually can arrange M value is 4.
Further, M the PRB made an appointment can be dispersed in whole system bandwidth range on frequency domain, and this kind of design is directed to the situation that system does not support the terminal of less radio frequency band, less bandwidth processing ability; M the PRB made an appointment can also be dispersed in and compare in the less bandwidth range of system bandwidth on frequency domain, what this bandwidth range depended on that system allows has minimum bandwidth disposal ability, and this kind of design is for the situation of the terminal of the less radio frequency band of system support, less bandwidth processing ability.
Usually, the position of M PRB the 1st PRB from low frequency made an appointment is determined by cell identifier, or determined by virtual subdistrict identifier, or numbered by cell identifier and subframe and determine, or numbered by virtual subdistrict identifier and subframe and determine, wherein, cell identifier or virtual subdistrict identifier can obtain by receiving synchronizing signal.
M the PRB made an appointment can be continuous print, also can have the frequency domain interval of setting, concrete, and this fixing frequency domain interval can be determined according to bandwidth, and such as, fixing frequency domain interval is
wherein,
the maximum reception bandwidth that the PRB number comprised for system bandwidth or terminal are supported,
represent the maximum integer being not more than x, or this fixing frequency domain interval can be set to
represent the maximum integer being not more than x, now, if M is more than or equal to 4, then this fixing frequency domain interval is 1, and each PRB essence is continuous print.
Further, terminal within the scope of E-PDCCH running time-frequency resource, can also determine the Resource Unit not transmitting E-PDCCH, concrete:
Terminal is determined within the scope of E-PDCCH running time-frequency resource, and the Resource Unit shared by public reference signal (common reference signal, CRS) is not used in E-PDCCH transmission, and the CRS port number that the port number of CRS and PBCH use is consistent;
Terminal can also be determined within the scope of E-PDCCH running time-frequency resource, user-specific reference signal (UE-specific reference signal, UERS) Resource Unit shared by is not used in E-PDCCH transmission, and the UERS port number that the port number of UERS and E-PDCCH use is consistent;
Terminal can be determined within the scope of E-PDCCH running time-frequency resource further, under channel state information reference signals (channel state information reference signal, CSI-RS) maximum configured set, zero energy and the Resource Unit shared by non-zero power CSI-RS are not used in E-PDCCH transmission.Or terminal can determine the Resource Unit do not existed within the scope of E-PDCCH running time-frequency resource shared by zero energy or non-zero power CSI-RS.
The embodiment of the present invention also provides a kind of transmission method of down control channel of enhancing of network side, as shown in Figure 4, comprising:
Step S401, need send strengthen down control channel E-PDCCH time, within the scope of the running time-frequency resource preset in subframe by preset search volume be E-PDCCH distribute running time-frequency resource;
Step S402, to terminal send E-PDCCH.
Further, can send the information field of the down control channel E-PDCCH configuration being used to indicate enhancing to terminal, it is the E-PDCCH transmission not relying on legacy PDCCH that this information field is used to indicate terminal E-PDCCH transmission means.Thus be convenient to the E-PDCCH transmission whether terminal recognition system supports not rely on legacy PDCCH, when system does not support the E-PDCCH transmission not relying on legacy PDCCH, terminal does not carry out the reception of E-PDCCH; When system support does not rely on the E-PDCCH transmission of legacy PDCCH, the E-PDCCH transmission method that the terminal possessing E-PDCCH receiving ability can provide according to the embodiment of the present invention carries out the reception of E-PDCCH.
The information field that this down control channel E-PDCCH being used to indicate enhancing configures can be arranged in the MIB transmitted by PBCH and send.
Concrete, from time domain scale, the E-PDCCH time-domain resource scope preset is: L1 ~ L2 OFDM symbol in subframe, wherein:
L1 can for the fixed value preset, and such as, L1 value can be set as 4, and now, E-PDCCH initial OFDM symbol numbering l=3, l are from 0 open numbering.
L1 also can set according to system bandwidth, such as, when the PRB number that system bandwidth comprises is less than or equal to 10, L1 value is 5, the now initial OFDM symbol numbering l=4 of E-PDCCH, when the PRB number comprised in system bandwidth is greater than 10, L1 value is 4, now the initial OFDM symbol numbering l=3 of E-PDCCH.
L2 is generally the fixed value preset, such as, at conventional cyclic prefix (cyclic prefix, CP) in common subframe, L2 value can be set as 7, represent front 1 slot transmission of E-PDCCH a subframe, L2 value also can be set as 14, represents that E-PDCCH transmits in 2 time slots of a subframe; In the common subframe of expansion CP, L2 value can be set as 6, and represent front 1 slot transmission of E-PDCCH a subframe, L2 value also can be set as 12, represents that E-PDCCH transmits in 2 time slots of a subframe; In special subframe, L2 depends on the OFDM symbol number that DwPTS comprises, and E-PDCCH time domain scale is terminate with the terminating symbol of descending pilot frequency time slot (Downlink Pilot Time Slot, DwPTS).
Transmit adopt SI-RNTI scrambling for dispatching the E-PDCCH of SIB1 time, for adopting the running time-frequency resource distributed for the E-PDCCH dispatching SIB1 in the subframe preset of SI-RNTI scrambling, thus blind Detecting and the reception of such E-PDCCH in the subframe that terminal can be preset again, can be carried out.
Further, from frequency domain, the E-PDCCH frequency domain resource scope preset can be: M the PRB made an appointment in subframe, M is the fixed value of making an appointment or the value indicated by the Physical Control Format Indicator Channel E-PCFICH strengthened, M value is from [3,6] in, value is better, and usually can arrange M value is 4.
Further, M the PRB made an appointment can be dispersed in whole system bandwidth range on frequency domain, and this kind of design is directed to the situation that system does not support the terminal of less radio frequency band, less bandwidth processing ability; M the PRB made an appointment can also be dispersed in and compare in the less bandwidth range of system bandwidth on frequency domain, what this bandwidth range depended on that system allows has minimum bandwidth disposal ability, and this kind of design is for the situation of the terminal of the less radio frequency band of system support, less bandwidth processing ability.
Usually, the position of M PRB the 1st PRB from low frequency made an appointment is determined by cell identifier, or determined by virtual subdistrict identifier, or numbered by cell identifier and subframe and determine, or numbered by virtual subdistrict identifier and subframe and determine, wherein, cell identifier or virtual subdistrict identifier can obtain by receiving synchronizing signal.
M the PRB made an appointment can be continuous print, also can have the frequency domain interval of setting, concrete, and this fixing frequency domain interval can be determined according to bandwidth, and such as, fixing frequency domain interval is
wherein,
the maximum reception bandwidth that the PRB number comprised for system bandwidth or terminal are supported,
represent the maximum integer being not more than x, or this fixing frequency domain interval can be set to
represent the maximum integer being not more than x, now, if M is more than or equal to 4, then this fixing frequency domain interval is 1, and each PRB essence is continuous print.
Further, for ease of terminal within the scope of E-PDCCH running time-frequency resource, determine the Resource Unit not transmitting E-PDCCH, can as follows in one or more distribute running time-frequency resources:
Within the scope of E-PDCCH running time-frequency resource, the Resource Unit shared by CRS is not used in E-PDCCH transmission, and the CRS port number that the port number of CRS and PBCH use is consistent;
Within the scope of E-PDCCH running time-frequency resource, the Resource Unit shared by UERS is not used in E-PDCCH transmission, and the UERS port number that the port number of UERS and E-PDCCH use is consistent;
Within the scope of E-PDCCH running time-frequency resource, under the set of CSI-RS maximum configured, zero energy and the Resource Unit shared by non-zero power CSI-RS are not used in E-PDCCH transmission.Or do not send zero energy or non-zero power CSI-RS within the scope of E-PDCCH running time-frequency resource.
The embodiment of the present invention is the corresponding transmitting device providing a kind of down control channel of enhancing also, and this device can be specially user terminal, and as shown in Figure 5, this device comprises:
Determining unit 501, receives E-PDCCH for determining;
Receiving element 502, for carrying out blind Detecting to receive E-PDCCH by the search volume of presetting within the scope of the E-PDCCH running time-frequency resource determined.
Wherein, determining unit 501 specifically for:
Determine to receive E-PDCCH according to the information field that the down control channel E-PDCCH being used to indicate enhancing received configures, it is the E-PDCCH transmission not relying on legacy PDCCH that information field is used to indicate terminal E-PDCCH transmission means.Wherein, the information field that this down control channel E-PDCCH being used to indicate enhancing configures can be arranged in the MIB transmitted by PBCH.
Concrete, the E-PDCCH time-domain resource scope determined is: L1 ~ L2 OFDM symbol in subframe, wherein:
L1 is the fixed value preset, or L1 is the value according to system bandwidth setting;
L2 is the fixed value preset.
Receiving element 502 also for:
The E-PDCCH for schedule system information block type 1SIB1 adopting system information radio network temporary identifier SI-RNTI scrambling is received in the subframe preset.
Concrete, the E-PDCCH frequency domain resource scope determined is: M PRB, M making an appointment in subframe are the fixed value of making an appointment or the value indicated by the Physical Control Format Indicator Channel E-PCFICH strengthened.
Receiving element 502 also for:
Determine within the scope of E-PDCCH running time-frequency resource, the Resource Unit shared by public reference signal CRS is not used in E-PDCCH transmission, and the CRS port number that the port number of CRS and PBCH use is consistent.
Receiving element 502 also for:
Determine within the scope of E-PDCCH running time-frequency resource, the Resource Unit shared by user-specific reference signal UERS is not used in E-PDCCH transmission, and the UERS port number that the port number of UERS and E-PDCCH use is consistent.
Receiving element 502 also for:
Determine within the scope of E-PDCCH running time-frequency resource, under the set of channel state information reference signals CSI-RS maximum configured, zero energy and the Resource Unit shared by non-zero power CSI-RS are not used in E-PDCCH transmission.
Receiving element 502 also for:
Determine the Resource Unit do not existed within the scope of E-PDCCH running time-frequency resource shared by CSI-RS.
The embodiment of the present invention provides a kind of transmitting device of down control channel of enhancing, and this device can be the network equipments such as base station, and as shown in Figure 6, this device comprises:
Resource allocation unit 601, for need send strengthen down control channel E-PDCCH time, within the scope of the running time-frequency resource preset in subframe by preset search volume be E-PDCCH distribute running time-frequency resource;
Transmitting element 602, for sending E-PDCCH to terminal.
Wherein, transmitting element 602 also for:
Send the information field of the down control channel E-PDCCH configuration being used to indicate enhancing to terminal, it is the E-PDCCH transmission not relying on legacy PDCCH that information field is used to indicate terminal E-PDCCH transmission means.Wherein, the information field that the down control channel E-PDCCH being used to indicate enhancing configures can be arranged in the MIB transmitted by PBCH.
Concrete, the E-PDCCH time-domain resource scope preset is: L1 ~ L2 OFDM symbol in subframe, wherein:
L1 is the fixed value preset, or L1 is the value according to system bandwidth setting;
L2 is the fixed value preset.
Resource allocation unit 601 also for:
The E-PDCCH for schedule system information block type 1SIB1 for employing system information radio network temporary identifier SI-RNTI scrambling distributes the running time-frequency resource in the subframe preset.
The E-PDCCH frequency domain resource scope preset is: M PRB, M making an appointment in subframe are the fixed value of making an appointment or the value indicated by the Physical Control Format Indicator Channel E-PCFICH strengthened.
Resource allocation unit 601 also for:
Determine within the scope of E-PDCCH running time-frequency resource, the Resource Unit shared by public reference signal CRS is not used in E-PDCCH transmission, and the CRS port number that the port number of CRS and PBCH use is consistent.
Resource allocation unit 601 also for:
Determine within the scope of E-PDCCH running time-frequency resource, the Resource Unit shared by user-specific reference signal UERS is not used in E-PDCCH transmission, and the UERS port number that the port number of UERS and E-PDCCH use is consistent.
Resource allocation unit 601 also for:
Determine within the scope of E-PDCCH running time-frequency resource, under the set of channel state information reference signals CSI-RS maximum configured, zero energy and the Resource Unit shared by non-zero power CSI-RS are not used in E-PDCCH transmission.
Resource allocation unit 601 also for:
Determine the CSI-RS not sending zero energy and non-zero power within the scope of E-PDCCH running time-frequency resource.
The embodiment of the present invention provides a kind of downlink control channel transmission and device of enhancing, by being that E-PDCCH distributes running time-frequency resource by the search volume of presetting within the scope of the running time-frequency resource that presets in subframe, make terminal can know the running time-frequency resource that E-PDCCH may use after the MIB receiving PBCH transmission, thus blind Detecting can be carried out on corresponding running time-frequency resource, to receive DCI on E-PDCCH.Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (36)
1. a transmission method for the down control channel strengthened, is characterized in that, comprising:
Terminal is determined to receive E-PDCCH;
Terminal carries out blind Detecting to receive E-PDCCH by the search volume of presetting within the scope of the E-PDCCH running time-frequency resource determined;
Wherein, the described E-PDCCH time-domain resource scope determined is: L1 ~ L2 OFDM symbol in subframe, and described L1 is the fixed value preset, or described L1 is the value according to system bandwidth setting; Described L2 is the fixed value preset; The described E-PDCCH frequency domain resource scope determined is: M PRB, M making an appointment in subframe are the fixed value of making an appointment or the value indicated by the Physical Control Format Indicator Channel E-PCFICH strengthened; Described default search volume is public search space.
2. the method for claim 1, is characterized in that, described terminal is determined to receive E-PDCCH, specifically comprises:
Terminal is determined to receive E-PDCCH according to the information field that the down control channel E-PDCCH being used to indicate enhancing received configures, and it is the E-PDCCH transmission not relying on legacy PDCCH that described information field is used to indicate E-PDCCH transmission means described in terminal.
3. method as claimed in claim 2, is characterized in that, also comprise:
The information field that the described down control channel E-PDCCH being used to indicate enhancing configures is arranged in the Master Information Block MIB transmitted by Physical Broadcast Channel PBCH.
4. the method for claim 1, is characterized in that, also comprises:
Terminal receives the E-PDCCH for schedule system information block type 1 SIB1 adopting system information radio network temporary identifier SI-RNTI scrambling in the subframe preset.
5. the method for claim 1, is characterized in that, described in M PRB making an appointment have the frequency domain interval of setting.
6. the method for claim 1, it is characterized in that, the position of the described M a made an appointment PRB the 1st PRB from low frequency is determined by cell identifier, or determined by virtual subdistrict identifier, or numbered by cell identifier and subframe and determine, or determined by virtual subdistrict identifier and subframe numbering.
7. the method for claim 1, is characterized in that, also comprises:
Terminal is determined within the scope of described E-PDCCH running time-frequency resource, and the Resource Unit shared by public reference signal CRS is not used in E-PDCCH transmission, and the CRS port number that the port number of CRS and PBCH use is consistent.
8. the method for claim 1, is characterized in that, also comprises:
Terminal is determined within the scope of described E-PDCCH running time-frequency resource, and the Resource Unit shared by user-specific reference signal UERS is not used in E-PDCCH transmission, and the UERS port number that the port number of UERS and E-PDCCH use is consistent.
9. the method for claim 1, is characterized in that, also comprises:
Terminal is determined within the scope of described E-PDCCH running time-frequency resource, and under the set of channel state information reference signals CSI-RS maximum configured, zero energy and the Resource Unit shared by non-zero power CSI-RS are not used in E-PDCCH transmission.
10. the method for claim 1, is characterized in that, also comprises:
Terminal determines the Resource Unit do not existed within the scope of described E-PDCCH running time-frequency resource shared by CSI-RS.
The transmission method of 11. 1 kinds of down control channels strengthened, is characterized in that, comprising:
Need send strengthen down control channel E-PDCCH time, within the scope of the running time-frequency resource preset in subframe by preset search volume be described E-PDCCH distribute running time-frequency resource;
Described E-PDCCH is sent to terminal;
Wherein, described in the E-PDCCH time-domain resource scope that presets be: L1 ~ L2 OFDM symbol in subframe, described L1 is the fixed value preset, or described L1 is the value according to system bandwidth setting; Described L2 is the fixed value preset; The described E-PDCCH frequency domain resource scope preset is: M PRB, M making an appointment in subframe are the fixed value of making an appointment or the value indicated by the Physical Control Format Indicator Channel E-PCFICH strengthened; Described default search volume is public search space.
12. methods as claimed in claim 11, is characterized in that, also comprise:
Send the information field of the down control channel E-PDCCH configuration being used to indicate enhancing to described terminal, it is the E-PDCCH transmission not relying on legacy PDCCH that described information field is used to indicate E-PDCCH transmission means described in terminal.
13. methods as claimed in claim 12, is characterized in that, described in be used to indicate enhancing down control channel E-PDCCH configure information field be arranged in the Master Information Block MIB transmitted by Physical Broadcast Channel PBCH.
14. methods as claimed in claim 11, is characterized in that, also comprise:
For adopt system information radio network temporary identifier SI-RNTI scrambling the running time-frequency resource preset in the subframe preset for the E-PDCCH of schedule system information block type 1SIB1 within the scope of by the search volume Resources allocation preset.
15. methods as claimed in claim 11, is characterized in that, described in M PRB making an appointment have the frequency domain interval of setting.
16. methods as claimed in claim 11, it is characterized in that, the position of the described M a made an appointment PRB the 1st PRB from low frequency is determined by cell identifier, or determined by virtual subdistrict identifier, or numbered by cell identifier and subframe and determine, or determined by virtual subdistrict identifier and subframe numbering.
17. methods as claimed in claim 11, is characterized in that, also comprise:
Within the scope of described E-PDCCH running time-frequency resource, the Resource Unit shared by public reference signal CRS is not used in E-PDCCH transmission, and the CRS port number that the port number of CRS and PBCH use is consistent.
18. methods as claimed in claim 11, is characterized in that, also comprise:
Within the scope of described E-PDCCH running time-frequency resource, the Resource Unit shared by user-specific reference signal UERS is not used in E-PDCCH transmission, and the UERS port number that the port number of UERS and E-PDCCH use is consistent.
19. methods as claimed in claim 11, is characterized in that, also comprise:
Within the scope of described E-PDCCH running time-frequency resource, under the set of channel state information reference signals CSI-RS maximum configured, zero energy and the Resource Unit shared by non-zero power CSI-RS are not used in E-PDCCH transmission.
20. methods as claimed in claim 11, is characterized in that, also comprise:
The CSI-RS of zero energy and non-zero power is not sent within the scope of described E-PDCCH running time-frequency resource.
The transmitting device of 21. 1 kinds of down control channels strengthened, is characterized in that, comprising:
Determining unit, receives E-PDCCH for determining;
Receiving element, for carrying out blind Detecting to receive E-PDCCH by the search volume of presetting within the scope of the E-PDCCH running time-frequency resource determined; Wherein, the described E-PDCCH time-domain resource scope determined is: L1 ~ L2 OFDM symbol in subframe, and described L1 is the fixed value preset, or described L1 is the value according to system bandwidth setting; Described L2 is the fixed value preset; The described E-PDCCH frequency domain resource scope determined is: M PRB, M making an appointment in subframe are the fixed value of making an appointment or the value indicated by the Physical Control Format Indicator Channel E-PCFICH strengthened; Described default search volume is public search space.
22. devices as claimed in claim 21, is characterized in that, described determining unit specifically for:
Determine to receive E-PDCCH according to the information field that the down control channel E-PDCCH being used to indicate enhancing received configures, it is the E-PDCCH transmission not relying on legacy PDCCH that described information field is used to indicate E-PDCCH transmission means described in terminal.
23. devices as claimed in claim 22, is characterized in that, described in be used to indicate enhancing down control channel E-PDCCH configure information field be arranged in the Master Information Block MIB transmitted by Physical Broadcast Channel PBCH.
24. devices as claimed in claim 21, is characterized in that, described receiving element also for:
The E-PDCCH for schedule system information block type 1SIB1 adopting system information radio network temporary identifier SI-RNTI scrambling is received in the subframe preset.
25. devices as claimed in claim 21, is characterized in that, described receiving element also for:
Determine within the scope of described E-PDCCH running time-frequency resource, the Resource Unit shared by public reference signal CRS is not used in E-PDCCH transmission, and the CRS port number that the port number of CRS and PBCH use is consistent.
26. devices as claimed in claim 21, is characterized in that, described receiving element also for:
Determine within the scope of described E-PDCCH running time-frequency resource, the Resource Unit shared by user-specific reference signal UERS is not used in E-PDCCH transmission, and the UERS port number that the port number of UERS and E-PDCCH use is consistent.
27. devices as claimed in claim 21, is characterized in that, described receiving element also for:
Determine within the scope of described E-PDCCH running time-frequency resource, under the set of channel state information reference signals CSI-RS maximum configured, zero energy and the Resource Unit shared by non-zero power CSI-RS are not used in E-PDCCH transmission.
28. devices as claimed in claim 21, is characterized in that, described receiving element also for:
Determine the Resource Unit do not existed within the scope of described E-PDCCH running time-frequency resource shared by CSI-RS.
The transmitting device of 29. 1 kinds of down control channels strengthened, is characterized in that, comprising:
Resource allocation unit, for need send strengthen down control channel E-PDCCH time, within the scope of the running time-frequency resource preset in subframe by preset search volume be described E-PDCCH distribute running time-frequency resource; Described default search volume is public search space;
Transmitting element, for sending described E-PDCCH to terminal; Wherein, described in the E-PDCCH time-domain resource scope that presets be: L1 ~ L2 OFDM symbol in subframe, described L1 is the fixed value preset, or described L1 is the value according to system bandwidth setting; Described L2 is the fixed value preset; The described E-PDCCH frequency domain resource scope preset is: M PRB, M making an appointment in subframe are the fixed value of making an appointment or the value indicated by the Physical Control Format Indicator Channel E-PCFICH strengthened.
30. devices as claimed in claim 29, is characterized in that, described transmitting element also for:
Send the information field of the down control channel E-PDCCH configuration being used to indicate enhancing to described terminal, it is the E-PDCCH transmission not relying on legacy PDCCH that described information field is used to indicate E-PDCCH transmission means described in terminal.
31. devices as claimed in claim 30, is characterized in that, described in be used to indicate enhancing down control channel E-PDCCH configure information field be arranged in the Master Information Block MIB transmitted by Physical Broadcast Channel PBCH.
32. devices as claimed in claim 29, is characterized in that, described resource allocation unit also for:
The E-PDCCH for schedule system information block type 1SIB1 for employing system information radio network temporary identifier SI-RNTI scrambling distributes the running time-frequency resource in the subframe preset.
33. devices as claimed in claim 29, is characterized in that, described resource allocation unit also for:
Determine within the scope of described E-PDCCH running time-frequency resource, the Resource Unit shared by public reference signal CRS is not used in E-PDCCH transmission, and the CRS port number that the port number of CRS and PBCH use is consistent.
34. devices as claimed in claim 29, is characterized in that, described resource allocation unit also for:
Determine within the scope of described E-PDCCH running time-frequency resource, the Resource Unit shared by user-specific reference signal UERS is not used in E-PDCCH transmission, and the UERS port number that the port number of UERS and E-PDCCH use is consistent.
35. devices as claimed in claim 29, is characterized in that, described resource allocation unit also for:
Determine within the scope of described E-PDCCH running time-frequency resource, under the set of channel state information reference signals CSI-RS maximum configured, zero energy and the Resource Unit shared by non-zero power CSI-RS are not used in E-PDCCH transmission.
36. devices as claimed in claim 29, is characterized in that, described resource allocation unit also for:
Determine the CSI-RS not sending zero energy and non-zero power within the scope of described E-PDCCH running time-frequency resource.
Priority Applications (2)
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|---|---|---|---|
| CN201210074680.2A CN102594513B (en) | 2012-03-20 | 2012-03-20 | Enhanced downlink control signal channel transmission method and device |
| PCT/CN2013/072024 WO2013139197A1 (en) | 2012-03-20 | 2013-02-28 | Method and device for transmitting enhanced downlink control channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210074680.2A CN102594513B (en) | 2012-03-20 | 2012-03-20 | Enhanced downlink control signal channel transmission method and device |
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| CN102594513A CN102594513A (en) | 2012-07-18 |
| CN102594513B true CN102594513B (en) | 2015-01-07 |
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| WO (1) | WO2013139197A1 (en) |
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| CN102594513A (en) | 2012-07-18 |
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