WO2013166980A1 - Procédé de transmission de canal e-pdcch ainsi que procédé et appareil de détermination de ressources temps - fréquence - Google Patents

Procédé de transmission de canal e-pdcch ainsi que procédé et appareil de détermination de ressources temps - fréquence Download PDF

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Publication number
WO2013166980A1
WO2013166980A1 PCT/CN2013/075421 CN2013075421W WO2013166980A1 WO 2013166980 A1 WO2013166980 A1 WO 2013166980A1 CN 2013075421 W CN2013075421 W CN 2013075421W WO 2013166980 A1 WO2013166980 A1 WO 2013166980A1
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Prior art keywords
pdcch
localized
pdcch candidate
candidate set
aggregation level
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PCT/CN2013/075421
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English (en)
Chinese (zh)
Inventor
赵锐
潘学明
拉盖施
沈祖康
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电信科学技术研究院
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Publication of WO2013166980A1 publication Critical patent/WO2013166980A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for transmitting an E-PDCCH, a method for determining a time-frequency resource, and a device. Background technique
  • the Physical Downlink Control Channel (PDCCH) is in each downlink.
  • the frame is transmitted, which occupies the first N Orthogonal Frequency Division Multiplexing (OFDM) symbol transmissions of one downlink subframe.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the first N OFDM symbols are referred to as "legacy" PDCCH regions.
  • control region ie, the legacy PDCCH region
  • RAG Resource Element
  • the downlink control information (Downlink Control Information, DCI) is carried on the PDCCH. Then, the transmission of DCI is also based on CCE.
  • the UE performs a PDCCH blind check in the control region to search for whether there is a PDCCH transmitted for it.
  • the blind detection is to use the Radio Network Temporary Identifier (RNTI) of the UE to decode different DCI formats and CCE aggregation levels. If the decoding is correct, the DCI for the UE is received.
  • the LTE UE needs to perform blind detection on the control region for each downlink subframe in the non-DRX (Discontinuous Reception) state to search for the PDCCH.
  • RNTI Radio Network Temporary Identifier
  • the UE searches for a PDCCH in a PDCCH search space of a downlink subframe control region, and receives a DCI for the UE.
  • one PDCCH search space is included in one downlink subframe, that is, a Common Search Space (CSS) and a UE-specific Search Space (UES).
  • the CSS is mainly used to transmit DCI for scheduling cell-specific control information (such as system information, paging message, multicast power control information, etc.), and the UESS is mainly used for transmitting DCI scheduled for each UE resource.
  • the CSS in each downlink subframe occupies the first 16 CCEs of the control region, and only two CCE aggregation levels of 4 and 8 are supported in the CSS.
  • the starting CCE position of the UESS of each UE in each downlink subframe is related to the subframe number of the downlink subframe, the RNTI of the UE, and the like, and the CESS aggregation levels of 1, 2, 4, and 8 can be supported in the UESS.
  • the blind detection of each CCE aggregation level corresponds to one search space, that is, the UE blind detection different CCE aggregation levels are performed in different search spaces.
  • Table 1 shows the search space for a UE to perform blind detection in one downlink subframe for different CCE aggregation levels. As shown in FIG.
  • a UE needs to perform 22 PDCCH channel resource search attempts in one downlink subframe, where the CSS has a total of 6 PDCCH channel resources, and the UESS has a total of 16 PDCCH channel resources.
  • the PDCCH channel resource refers to a time-frequency resource occupied by a PDCCH candidate channel ( candidate ).
  • the search space can also be described as a PDCCH candidate set. Take the UESS with the CCE aggregation level of 1 in Figure 2 as an example.
  • the corresponding PDCCH candidate set includes 6 PDCCCH candidates.
  • a physical downlink control channel (R-PDCCH) for a relay system is defined in the LTE Rel-10 system, and the R-PDCCH is used by the base station to transmit control signaling to the relay, which occupies a physical downlink shared channel (Physical Downlink) Shared Channel, PDSCH) area.
  • R-PDCCH Physical Downlink control channel
  • the R-PDCCH and PDSCH resource structures are shown in FIG.
  • the resources occupied by the R-PDCCH are configured through high layer signaling.
  • the Physical Resourc Block pair (PRB pair) resource can be continuous It can also be discontinuous.
  • PRB pair Physical Resourc Block pair
  • the R-PDCCH does not include the common search space, and only the relay-dedicated R-PDCCH search space.
  • Downlink grant (DL grant) and uplink grant (UL grant) signaling can be transmitted by Time-Division Multiplexing (TDM):
  • the DL grant is transmitted in the first time slot.
  • the Relay detects DCI format 1 A and a DCI format associated with the transmission mode.
  • the UL grant is transmitted in the second time slot.
  • Relay detects DCI format 0 and a DCI format associated with the transmission mode.
  • mapping modes are defined in the transmission of the R-PDCCH, which are an interleaved manner and a non-interleaved manner, and different search spaces are defined for the R-PDCCHs of the two mapping modes:
  • the interleaving manner which is defined by the PDCCH in the LTE Rel-8/9/10 system, the aggregation level is in CCE units, and each CCE is composed of 9 REGs, where the mapping between the CCE and the REG follows the PDCCH defined in the PDCCH.
  • Interleaving mode The definition of the search space of the R-PDCCH mapped by the interleaving manner is consistent with the definition of UESS in the LTE Rel-8/9/10 system, the starting CCE position of the R-PDCCH search space and the Relay-RNTI and The subframe number of the downlink subframe is related.
  • the unit of the aggregation level is PRB, and the resources occupied by the candidate channels in the search space have a fixed mapping relationship with the order of the PRB.
  • the starting position of the R-PDCCH search space always starts from a discrete virtual physical resource block (VRB) with a logical number of 0, and the R-PDCCH candidate set in one aggregation level occupies a logically contiguous resource.
  • VRB virtual physical resource block
  • the number of R-PDCCH candidate set sums under each PRB aggregation level is as shown in Table 2.
  • the search space of the R-PDCCH is shown in FIG.
  • an enhanced PDCCH (E-PDCCH) is introduced. It is determined that the E-PDCCH has two transmission modes: frequency domain continuous transmission (localized) and frequency domain discontinuous transmission (distributed), which are applied to different scenarios.
  • the localized transmission mode is mostly used by the base station to obtain feedback from the UE. Accurate channel information, and the neighboring cell perturbation does not change very closely with the subframe. In this case, the base station selects a continuous frequency resource with better shield capacity for the terminal according to the channel state information (CSI) fed back from the UE.
  • CSI channel state information
  • the E-PDCCH needs to be transmitted in a distributed manner, that is, the frequency resource is discontinuously transmitted, thereby obtaining the frequency. Diversity gain. As shown in FIG. 5, in the localized transmission mode, one E-PDCCH transmitted to one UE is located in one PRB pair. In the distributed transmission mode, one E-PDCCH transmitted to one UE occupies resources in four PRB pairs.
  • the starting position of the R-PDCCH search space always starts from the VRB with the logical number 0, and the R-PDCCH candidate set in one aggregation level occupies a logically consecutive Resources.
  • the number of Relays is much smaller than that of the UE. Even if the starting point of the search space is the same, it does not cause excessive R-PDCCH blocking.
  • the resource granularity of the R-PDCCH is PRB, therefore, different Relays can also configure different PRB resources to achieve different starting point positions.
  • the channel between the Relay and the base station is relatively stable, and the frequency selective scheduling can be realized through semi-static configuration of resources. Therefore, it is a good choice to define the starting position of the R-PDCCH search space and the R-PDCCH candidate set by the above method.
  • the number of UEs in the system is far more than the number of relays, and the minimum resource granularity of multiple E-PDCCH search spaces in one PRB pair, such as enhanced CCE (Enhanced CCE) , E-CCE), the resource cannot be fully utilized by simply configuring different PRB resources; on the other hand, the channel between the UE and the base station is much more drastic than the channel change between the Relay and the base station, and the UE's E- The PDCCH candidate needs to cover as many PRB pair resources as possible, so that frequency selective scheduling can be better. Therefore, the definition of the R-PDCCH search space cannot be used to determine the UESS of the E-PDCCH in the localized transmission mode. Summary of the invention
  • An object of the present invention is to provide a method for transmitting an E-PDCCH, a method and a device for determining a time-frequency resource, to implement UESS configuration and E-PDCCH transmission of an E-PDCCH.
  • the aggregation level refers to the aggregation level of the E-CCE, and the aggregation level L may have values of 1, 2, 4, and 8. It can also be used for other values.
  • the resource granularity of the aggregation level is E-CCE.
  • a method for transmitting an E-PDCCH includes:
  • the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that the terminal can use to transmit the E-PDCCH in the current subframe, and the localized E-PDCCH candidate set corresponding to each aggregation level The number of E-PDCCH candidates in the localized E-PDCCH candidate set in each aggregation level, and the E-CCE number of the localized E-PDCCH occupied by each E-PDCCH candidate in each localized E-PDCCH candidate set, and the localized E corresponding to the aggregation level - the absolute value of the number difference of the starting E-CCEs between any two adjacent E-PDCCH candidates in the PDCCH candidate set is equal;
  • the network side device selects one or more E-PDCCH candidates in the corresponding localized E-PDCCH candidate set under various aggregation levels, and occupies the E-CCE corresponding to the localized E-PDCCH by using the selected E-PDCCH candidate
  • the frequency resource transmits an E-PDCCH to the terminal.
  • a method for determining a time-frequency resource of a distributed E-PDCCH includes:
  • the number of the PDCCH candidate, the number of the E-CCE occupying the localized E-PDCCH of each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L, and any adjacent one of the localized E-PDCCH candidate sets The absolute value of the initial E-CCE difference between the two E-PDCCH candidates is equal;
  • the network side device #> determines, according to the time-frequency resource occupied by the terminal in the localized E-PDCCH candidate set corresponding to the aggregation level L, that the terminal corresponds to the frequency domain discontinuous transmission distributed E- at an aggregation level.
  • the time-frequency resource occupied by the PDCCH candidate set, and the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the aggregation level L.
  • the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L refers to the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH occupied by each E-PDCCH candidate in the localized E-PDCCH candidate set.
  • a method for transmitting an E-PDCCH includes:
  • the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources available for transmitting the E-PDCCH in the current subframe, and the E-PDCCH in the localized E-PDCCH candidate set corresponding to each aggregation level The number of candidates, the number of E-CCEs that occupy the localized E-PDCCH for each E-PDCCH candidate in the corresponding localized E-PDCCH candidate set under each aggregation level, and the corresponding localized E-PDCCH candidate set in the aggregation level.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates is equal;
  • a time-frequency resource determining method for each of the distributed E-PDCCHs in the localized E-PDCCH candidate set corresponding to the at least one aggregation level of the terminal including:
  • the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources available for transmitting the E-PDCCH in the current subframe, and the E-PDCCH in the localized E-PDCCH candidate set corresponding to the aggregation level L The number of candidates, the number of E-CCEs in which the E-PDCCH candidates in the localized E-PDCCH candidate set in the corresponding localized E-PDCCH candidate set occupy the localized E-PDCCH, and any adjacent two of the localized E-PDCCH candidate sets are determined.
  • the absolute value of the initial E-CCE difference between E-PDCCH candidates is equal;
  • the terminal determines, according to the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the aggregation level L, the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set under one aggregation level, under an aggregation level
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set is all or part of the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L, and the corresponding localized E-PDCCH candidate set in the aggregation level L is occupied.
  • the time-frequency resource refers to a time-frequency resource corresponding to the E-CCE of the localized E-PDCCH in each of the E-PDCCH candidates in the localized E-PDCCH candidate set.
  • a network side device including:
  • a localized E-PDCCH search space determining module configured to continuously transmit the number of enhanced control channel elements E-CCE of the localized E-PDCCH according to a frequency domain corresponding to a time-frequency resource that is used by the terminal to transmit the E-PDCCH in the current subframe And the number of E-PDCCH candidates in the localized E-PDCCH candidate aggregation set corresponding to each aggregation level, and determining that each E-PDCCH candidate in the localized E-PDCCH candidate set in each aggregation level occupies a localized E-PDCCH
  • the number of the E-CCE, the absolute value of the number difference of the starting E-CCE between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set at the aggregation level is equal;
  • An E-PDCCH sending module configured to select one or more E-PDCCH candidates in the corresponding localized E-PDCCH candidate set under various aggregation levels, and occupy the E-CCE of the localized E-PDCCH by using the selected E-PDCCH candidate
  • the corresponding time-frequency resource sends an E-PDCCH to the terminal.
  • a terminal comprising:
  • the localized E-PDCCH search space determining module is configured to: according to the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that can be used for transmitting the E-PDCCH in the current subframe, and the localized corresponding to each aggregation level The number of E-PDCCH candidates in the E-PDCCH candidate set, and the number of E-CCEs that occupy the localized E-PDCCH for each E-PDCCH candidate in the corresponding localized E-PDCCH candidate set for each aggregation level, an aggregation level.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set is equal;
  • the E-PDCCH receiving module is configured to receive the E-PDCCH on the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH occupied by each E-PDCCH candidate in the corresponding localized E-PDCCH candidate set in the at least one aggregation level.
  • a terminal comprising: The localized E-PDCCH search space determining module is configured to: according to the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that the terminal can use to transmit the E-PDCCH in the current subframe, and corresponding to the aggregation level L The number of E-PDCCH candidates in the localized E-PDCCH candidate set, and the number of the E-CCE in which the localized E-PDCCH is occupied by each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L, the localized The absolute value of the number difference of the starting E-CCEs between any two adjacent E-PDCCH candidates in the E-PDCCH candidate set is equal;
  • a distributed E-PDCCH search space determining module configured to determine, according to the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the terminal at the aggregation level L, the occupied E-PDCCH candidate set corresponding to the aggregation level
  • the time-frequency resource, the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L, and the aggregation level L
  • the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set refers to the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH in each localized E-PDCCH candidate set.
  • the E-PDCCH transmission method and apparatus provided by the present invention configure E for each localized E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to each aggregation level for the E-PDCCH transmission.
  • -CCE that is, the search space ( UESS ) of the localized E-PDCCH is configured for the terminal.
  • the localized E-PDCCH candidate set under each aggregation level of a terminal is defined to be allocated on the time-frequency resource that the terminal can use to transmit the E-PDCCH, so that the localized E-PDCCH can obtain better frequency selective scheduling.
  • the method and device for determining the time-frequency resource of the distributed E-PDCCH provided by the present invention using all or part of the time-frequency resources occupied by the localized E-PDCCH candidate set corresponding to the aggregation level L as the time-frequency resource of the distributed E-PDCCH, can be implemented Frequency diversity gain, further, improves resource utilization.
  • FIG. 1 is a schematic diagram of multiplexing relationship between a control area and a data area in a downlink subframe in the prior art
  • FIG. 2 is a schematic diagram of a UESS of a PDCCH in the prior art
  • FIG. 3 is a schematic structural diagram of R-PDCCH and PDSCH resources in the prior art
  • FIG. 4 is a schematic diagram of a search space of a prior art R-PDCCH
  • FIG. 5 is a schematic diagram of resource structure of an E-PDCCH of two transmission modes in the prior art
  • FIG. 6 is a flowchart of a method for transmitting E-PDCCH of a network side device according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a time-frequency resource occupied by a localized E-PDCCH candidate set according to an embodiment of the present invention
  • FIG. 8 is a flow chart of a method for determining a time-frequency resource of a distributed E-PDCCH of a base station side device according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of time-frequency resources occupied by a distributed E-PDCCH candidate set according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a method for transmitting a terminal side E-PDCCH according to an embodiment of the present invention.
  • FIG. 11 is a flowchart of a method for determining a time-frequency resource of a terminal-side distributed E-PDCCH according to an embodiment of the present invention
  • FIG. 12 is a schematic structural diagram of a network-side device according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of another network side device according to an embodiment of the present disclosure.
  • FIG. 14 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic structural diagram of another terminal according to an embodiment of the present invention. detailed description
  • the resource granularity of the search space of the E-PDCCH is E-CCE.
  • the present invention provides an E-PDCCH transmission method, and the implementation manner thereof is as shown in FIG. 6, which specifically includes the following operations:
  • Step 100 The number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that the terminal can use to transmit the E-PDCCH in the current subframe, and the localized E-PDCCH candidate corresponding to each aggregation level.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in the localized E-PDCCH candidate set in the aggregation level is equal.
  • the localized E-PDCCH candidate set for each aggregation level of one terminal is dispersed on the time-frequency resource that the terminal can use to transmit the E-PDCCH.
  • the E-CCEs of the localized E-PDCCHs in the corresponding localized E-PDCCH candidate set in the aggregation level L are L.
  • one E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L occupies the E-CCE number of the localized E-PDCCH, and the E-PDCCH candidate occupies L E of the localized E-PDCCH - The number of the CCE.
  • Step 110 The network side device selects one or more E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to the various aggregation levels, and occupies the E-CCE corresponding to the localized E-PDCCH by using the selected E-PDCCH candidate.
  • the time-frequency resource transmits an E-PDCCH to the above terminal.
  • the method provided by the present invention allocates, to the terminal, the E-CCE of each E-PDCCH candidate occupying the localized E-PDCCH in the localized E-PDCCH candidate set corresponding to each aggregation level, that is, before transmitting the E-PDCCH to the terminal, that is, A localized E-PDCCH search space (UESS) is allocated for the terminal.
  • UESS A localized E-PDCCH search space
  • the localized E-PDCCH candidate set under each aggregation level of one terminal is dispersed on the time-frequency resource that the terminal can use to transmit the E-PDCCH, so that the localized E-PDCCH can obtain better frequency selective scheduling.
  • E-CCE is defined for the localized E-PDCCH and the distributed E-PDCCH, respectively.
  • the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH corresponding to the aggregation level is located inside a PRB pair. And on the time-frequency resource that can be used for transmitting the E-PDCCH, corresponding to the E-CCE of the consecutively numbered localized E-PDCCH.
  • the E-CCEs of the adjacent localized E-PDCCHs are also adjacent to each other on the physical resources, that is, the time-frequency resources corresponding to the E-CCEs of the adjacent localized E-PDCCHs are within a PRB pair, or
  • the time-frequency resources corresponding to the E-CCEs of the adjacent localized E-PDCCHs are located in the adjacent VRBs.
  • the PRB pair allocated for the E-PDCCH is 1, 5, 15, and 30, and the PRB pair corresponds to the E-CCE of the four localized E-PDCCHs, so that a total of 16 localized E-PDCCH E-CCEs can be used for transmission.
  • E-PDCCH and the number is 0 ⁇ 15.
  • the time-frequency resources corresponding to the E-CCEs of the localized E-PDCCHs numbered 1 and 2 are internal to the PRB pair 1.
  • the time-frequency resources corresponding to the E-CCEs of the localized E-PDCCHs numbered 3 and 4 are respectively located at the end position of the PRB pair 1 and the start position of the PRB pair 2, that is, in the adjacent VRBs.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to the aggregation level is equal to
  • the number of the starting E-CCEs between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set in the aggregation level is the aggregation level corresponding to the localized E-PDCCH candidate set. Integer multiple.
  • the absolute value of the number difference of the initial E-CCEs between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set in the above-mentioned aggregation level may also be:
  • the number of the starting E-CCEs between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set under the aggregation level is the aggregation level corresponding to the localized E-PDCCH candidate set and one PRE.
  • the interval between any two adjacent E-PDCCH candidates in a localized E-PDCCH candidate set is not limited to the above two cases, as long as each E-PDCCH candidate in a localized E-PDCCH candidate set is satisfied.
  • the interval between the two E-PDCCH candidates is the same.
  • the network side device allocates in advance to the terminal a time-frequency resource that can be used to transmit the E-PDCCH in the current subframe.
  • the specific time-frequency resource allocation manner is known to those skilled in the art, and details are not described herein again.
  • After determining, by the terminal, the time-frequency resource that can be used to transmit the E-PDCCH in the current subframe, according to the correspondence between the E-CCE and the time-frequency resource of the localized E-PDCCH it can be determined that the terminal can be used to transmit the E- in the current subframe.
  • the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources of the PDCCH.
  • the network side device further determines the number of E-PDCCH candidates in the corresponding localized E-PDCCH candidate set in each aggregation level, and the specific implementation manner thereof may be: but not limited to: the network side device according to the agreement with the foregoing terminal , determining the corresponding localized E-PDCCH candidate set in each aggregation level E-PDCCH candidate number; or, the network side device determines the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to each aggregation level, and the corresponding localized E-PDCCH candidate corresponding to each aggregation level to be determined
  • the number of E-PDCCH candidates in the set is sent to the terminal, which may be, but is not limited to, signaling.
  • the starting position of the UESS can be different.
  • the implementation of the foregoing step 100 may be specifically: the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that the terminal can use to transmit the E-PDCCH in the current subframe according to the terminal, each aggregation level. Determine the number of E-PDCCH candidates in the corresponding localized E-PDCCH candidate set, and the starting position of the localized E-PDCCH candidate set corresponding to each aggregation level, and determine the localized E-PDCCH candidate corresponding to each aggregation level. Each E-PDCCH candidate in the set occupies the number of the E-CCE of the localized E-PDCCH.
  • the starting position of the localized E-PDCCH candidate set corresponding to the aggregation level L refers to the start of the localized E-PDCCH candidate set corresponding to the aggregation level L on the time-frequency resource that can be used for transmitting the E-PDCCH. E-CCE number.
  • the method provided by the foregoing method may further include: determining, by the network side device, a deviation of a starting position of a localized E-PDCCH candidate set corresponding to each aggregation level according to an RNTI of the terminal according to a manner agreed with the terminal. And shifting the parameter (offset); and determining, according to the offset, a starting position of the corresponding localized E-PDCCH candidate set under each aggregation level.
  • the specific implementation manner of determining the offset of the starting position of the localized E-PDCCH candidate set corresponding to each aggregation level according to the RNTI of the terminal may be, but is not limited to, the following:
  • the RNTI and the current subframe number-related hash function determine the offset of the starting position of the corresponding localized E-PDCCH candidate set for each aggregation level, and the hash function used is agreed with the terminal; or, according to the terminal
  • the convention is to determine the offset of the starting position of the corresponding localized E-PDCCH candidate set for each aggregation level by the formula mod (RNTI, K/L).
  • the offset of the starting position of the corresponding localized E-PDCCH candidate set under each aggregation level may also be determined based on the RNTI of the terminal.
  • the method provided by the foregoing method may further include: determining, by the network side device, an offset of a starting position of a localized E-PDCCH candidate set corresponding to each aggregation level according to the RNTI of the terminal; determining each aggregation level according to the offset The start position of the corresponding localized E-PDCCH candidate set; and the offset parameter of the start position of the corresponding localized E-PDCCH candidate set under each aggregation level is sent to the terminal.
  • the network side device may refer to the foregoing description, and details are not described herein again.
  • the method provided by the present invention may further include: the network side device determining, according to the predetermined offset parameter association information and the RNTI of the terminal, an offset of a starting position of the localized E-PDCCH candidate set corresponding to each aggregation level; Determining a corresponding localized E-PDCCH candidate for each aggregation level according to the offset Sending a starting position of the set; and transmitting an offset parameter of the starting position of the localized E-PDCCH candidate set corresponding to the aggregation level to the terminal, so that the terminal determines the other aggregation level according to the offset parameter association information
  • the offset parameter of the starting position of the corresponding localized E-PDCCH candidate set may refer to the foregoing description, and details are not described herein again.
  • the above-mentioned offset parameter association information is pre-agreed by the network side device and the terminal, and is used to describe the association between the offsets of the start positions of the corresponding localized E-PDCCH candidate sets under various aggregation levels.
  • the starting E-CCE number difference between the E-PDCCH candidates is an integer multiple of the aggregation level corresponding to the localized E-PDCCH candidate set.
  • the number of the E-CCE of the localized E-PDCCH occupied by each E-PDCCH candidate in the corresponding localized E-PDCCH candidate set under the aggregation level L can be determined by the following formula:
  • E-PDCCH candidate indicates the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that can be used for transmitting the localized E-PDCCH; M represents the set of l oca li ze d E-PDCCH candidate
  • E-PDCCH candidate number represents an offset parameter of the starting position of the localized E-PDCCH candidate set;
  • S o + indicates that the i oca ii ze d corresponds to the starting position of the E-PDCCH candidate set Start
  • the number of the starting E-CCEs between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set in the aggregation level L is the aggregation level L and the E-CCE corresponding to one PRB pair
  • the number of the least common multiple of the number K, the number of the E-CCE of the localized E-PDCCH occupied by each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L can be expressed by the following formula: S.
  • E-PDCCH candidate indicates the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that can be used for transmitting the localized E-PDCCH; M represents the set of l oca li ze d E-PDCCH candidate
  • E-PDCCH candidate number represents an offset parameter of the starting position of the localized E-PDCCH candidate set;
  • S o + indicates that the i oca ii ze d corresponds to the starting position of the E-PDCCH candidate set Start So + offset (L) nL + floor (N eCCE IM [L) ILL
  • the time-frequency resource is composed of 6 PRB pairs, and each PRB pair corresponds to 4 E-CCEs.
  • the offset ( 1 ) of UE1 is 0, and the offset ( 1 ) of UE2 is 2.
  • the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to UE1 in aggregation level 1 and aggregation level 2 is 6.
  • the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to UE1 in aggregation level 1 and aggregation level 2 is 6. Then, according to the above formula
  • Each E-PDCCH candidate in the E-PDCCH candidate set occupies the number of the E-CCE of the localized E-PDCCH, as shown in FIG.
  • the number 0 ⁇ 23 indicates the number of the E-CCE of the localized E-PDCCH.
  • the UE1 starting point refers to the starting position of the corresponding localized E-PDCCH candidate set of UE1 at the corresponding aggregation level.
  • Each PRB pair may be discontinuous in the frequency domain, but the corresponding VRBs are contiguous.
  • the present invention also provides a method for determining a time-frequency resource of a distributed E-PDCCH, and the implementation manner thereof is as shown in FIG. 8.
  • the specific implementation manner includes:
  • Step 200 The network side device corresponds to a time-frequency resource that the terminal can use to transmit the E-PDCCH in the current subframe.
  • the number of E-CCEs in the localized E-PDCCH, and the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to the aggregation level L, and the respective localized E-PDCCH candidate sets in the aggregation level L are determined.
  • the E-PDCCH candidate occupies the number of the E-CCE of the localized E-PDCCH.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set at the aggregation level L is equal.
  • the localized E-PDCCH candidate set for each aggregation level of one terminal is dispersed on the time-frequency resource that the terminal can use to transmit the E-PDCCH.
  • the specific implementation manner of the step 200 may refer to the foregoing embodiments of the E-PDCCH transmission method, and determine, for the terminal, the E of the localized E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to each aggregation level. -
  • the specific implementation of CCE is not mentioned here.
  • Step 210 The network side device # ⁇ determines, according to the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the terminal at the aggregation level L, that the terminal corresponds to the frequency domain discontinuous transmission distributed E- at an aggregation level. Time-frequency resources occupied by the PDCCH candidate set.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level 2 is the same as the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the aggregation level 1, or the localized E- corresponding to the aggregation level 1.
  • the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L refers to the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH in each localized E-PDCCH candidate set.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the aggregation level L. Therefore, the distributed E- determined by the terminal is determined.
  • the time-frequency resources of the PDCCH search space inherit the advantages of the localized E-PDCCH search space configuration, and can obtain better frequency selection scheduling and achieve frequency diversity gain. On this basis, the resource utilization of the system is also improved.
  • E-CCE is defined separately.
  • the E-CCEs of the distributed E-PDCCH are not continuously distributed on the time-frequency resources. That is to say, there may be some time-frequency resources in multiple PRB pairs corresponding to the E-CCE of a distributed E-PDCCH.
  • the time-frequency resource occupied by one distributed E-PDCCH candidate of the corresponding distributed E-PDCCH candidate set in the aggregation level is the multiple E-PDCCH candiate of the localized E-PDCCH candidate set corresponding to the aggregation level L. , a combination of some or all of the time-frequency resources occupied by each E-PDCCH candiate.
  • time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set under the aggregation level L is assumed.
  • the time-frequency resources occupied by the localized E-PDCCH candidate set corresponding to the aggregation level 1 are the same.
  • the value of L can be 2, 4, 8.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set under the aggregation level L is as shown in FIG. 9.
  • the time-frequency resources occupied by the localized E-PDCCH candidate set in the aggregation level 1 are distributed on the eight PRB pairs, and each PRB pair corresponds to the E-CCE of the four localized E-PDCCHs. These 8 PRB pairs may be discontinuous in the frequency domain, but the corresponding VRBs are continuous.
  • the time-frequency resource distribution occupied by the E-PDCCH candidate is as shown in FIG. 9.
  • the E-PDCCH candidate 1 in the distributed E-PDCCH candidate set corresponding to the aggregation level 2 is used as an example, and the time-frequency resource occupied by the E-PDCCH candidate 1 in the localized E-PDCCH candidate set corresponding to the aggregation level 1 may be occupied by the E-PDCCH candidate 1 in the localized E-PDCCH candidate set corresponding to the aggregation level 1. Part or all of the time-frequency resources and some or all of the time-frequency resources occupied by the E-PDCCH candidate 5.
  • the value of the aggregation level L can also be 1.
  • the time-frequency resources occupied by the E-PDCCH candidate can refer to the distributed E-PDCCH corresponding to the aggregation level 2.
  • the time-frequency resource distribution occupied by the E-PDCCH candidate in the candidate set is directly inferred, and will not be described here.
  • the present invention further provides an E-PDCCH transmission method, and the implementation manner thereof is as shown in FIG. 10, and the specific implementation manner is as follows:
  • Step 300 The number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that can be used to transmit the E-PDCCH in the current subframe, and the corresponding localized E-PDCCH candidate set in each aggregation level.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in a localized E-PDCCH candidate set is equal.
  • the localized E-PDCCH candidate set for each aggregation level of one terminal is dispersed on the time-frequency resource that the terminal can use to transmit the E-PDCCH.
  • Step 310 The method provided by the present invention in the localized E-PDCCH candidate set corresponding to the at least one aggregation level, the terminal determines the localized E-PDCCH candidate set corresponding to each aggregation level before receiving the E-PDCCH.
  • Each E-PDCCH candidate occupies the E-CCE of the localized E-PDCCH, that is, the search space (UESS) of the localized E-PDCCH of the terminal is determined.
  • the localized E-PDCCH candidate set under each aggregation level of a terminal is dispersed on the time-frequency resource that the terminal can use to transmit the E-PDCCH, so that the localized E-PDCCH can obtain better frequency selective scheduling.
  • the E-CCE and the terminal for the localized E-PDCCH are currently The specific mapping relationship of the time-frequency resources that can be used to transmit the E-PDCCH in the subframe, and the absolute difference of the number of the initial E-CCE between any two adjacent E-PDCCH candidates in a localized E-PDCCH candidate set.
  • the description of the concept of the network side device method refer to the description of the various embodiments of the network-side device method, and the description of the embodiments of the network-side device method is omitted. .
  • the terminal further determines the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to each aggregation level, and the specific implementation manner thereof may be, but is not limited to: the terminal according to the agreement with the network side device. Determining the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to each aggregation level; or, the terminal receiving the E in the localized E-PDCCH candidate set corresponding to each aggregation level sent by the network side device - The number of PDCCH candidates.
  • the starting position of the UESS can be different.
  • the implementation of the foregoing step 300 may be specifically: the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that can be used for transmitting the E-PDCCH in the current subframe, and corresponding to each aggregation level. Determine the number of E-PDCCH candidates in the localized E-PDCCH candidate set, and the starting position of the localized E-PDCCH candidate set corresponding to each aggregation level, and determine the corresponding localized E-PDCCH candidate set in each aggregation level. Each E-PDCCH candidate occupies the number of the E-CCE of the localized E-PDCCH.
  • the method provided by the foregoing method may further include: determining, by the terminal, the offset of the starting position of the localized E-PDCCH candidate set corresponding to each aggregation level according to the RNTI of the terminal according to the manner agreed by the network side device. And shifting parameters; determining, according to the offset parameter, a starting position of a corresponding localized E-PDCCH candidate set under each aggregation level. .
  • the network side device method may further include: determining, by the terminal, the offset of the starting position of the localized E-PDCCH candidate set corresponding to each aggregation level according to the RNTI of the terminal according to the manner agreed by the network side device.
  • shifting parameters determining, according to the offset parameter, a starting position of a corresponding localized E-PDCCH candidate set under each aggregation level.
  • the method provided by the foregoing method may further include: receiving, by the terminal, an offset parameter of a starting position of a localized E-PDCCH candidate set corresponding to each aggregation level sent by the network side device; determining each type according to the offset parameter The starting position of the corresponding localized E-PDCCH candidate set under the aggregation level.
  • the method provided by the foregoing method may further include: receiving, by the terminal, an offset parameter of a starting position of a localized E-PDCCH candidate set corresponding to an aggregation level sent by the network side device; according to the determined offset parameter Correlation information, determining an offset parameter of a starting position of the corresponding localized E-PDCCH candidate set under other aggregation levels; determining each type according to an offset parameter of a starting position of the corresponding localized E-PDCCH candidate set under each aggregation level The starting position of the corresponding localized E-PDCCH candidate set under the aggregation level.
  • the starting E-CCE number difference between the E-PDCCH candidates is an integer multiple of the aggregation level corresponding to the localized E-PDCCH candidate set.
  • the number of the E-CCE of the localized E-PDCCH occupied by each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L may be as follows The formula determines:
  • the number of the starting E-CCEs between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set in the aggregation level L is the aggregation level L and the E-CCE corresponding to one PRB pair
  • the number of the E-CCE of the localized E-PDCCH occupied by each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L may be as follows:
  • the present invention further provides a method for determining a time-frequency resource of a distributed E-PDCCH, which is implemented as shown in FIG. 11.
  • the specific implementation includes the following operations: Step 400:
  • the terminal is configured to transmit an E-PDCCH according to the current subframe.
  • Each E-PDCCH candidate in the candidate set occupies the number of the E-CCE of the localized E-PDCCH.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set at the aggregation level L is equal.
  • the localized E-PDCCH candidate set for each aggregation level of one terminal is dispersed on the time-frequency resource that the terminal can use to transmit the E-PDCCH.
  • step 400 For the specific implementation of the step 400, reference may be made to the foregoing embodiments of the E-PDCCH transmission method, where the terminal determines that each E-PDCCH candidate in the localized E-PDCCH candidate set in each aggregation level occupies the E-PDCCH of the localized E-PDCCH.
  • CCE The specific implementation of CCE is not mentioned here.
  • Step 410 The terminal determines, according to the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L, the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in an aggregation level.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L.
  • the time-frequency resource occupied by the localized E-PDCCH candidate set in the localized E-PDCCH candidate set is the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH in the localized E-PDCCH candidate set.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the aggregation level L. Therefore, the distributed E-PDCCH determined by the terminal is determined.
  • the time-frequency resources of the search space inherit the advantages of the localized E-PDCCH search space configuration, and can obtain better frequency selection scheduling and achieve frequency diversity gain. On this basis, the resource utilization of the system is also improved.
  • the time-frequency resource occupied by one distributed E-PDCCH candidate of the corresponding distributed E-PDCCH candidate set in the aggregation level is the multiple E-PDCCH candiate of the localized E-PDCCH candidate set corresponding to the aggregation level L, A combination of some or all of the time-frequency resources occupied by each E-PDCCH candiate.
  • the invention also provides a network side device, the structure of which is shown in FIG. 12, and the specific implementation structure is as follows:
  • the localized E-PDCCH search space determining module 1001 is configured to continuously transmit the enhanced control channel unit E-CCE of the localized E-PDCCH according to a frequency domain corresponding to the time-frequency resource that the terminal can use to transmit the E-PDCCH in the current subframe. And the number of E-PDCCH candidates in the localized E-PDCCH candidate aggregation set corresponding to each aggregation level, and determining that each E-PDCCH candidate in the corresponding localized E-PDCCH candidate set of each aggregation level occupies a localized E- The number of the E-CCE of the PDCCH. The absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set in the aggregation level is equal.
  • the E-PDCCH sending module 1002 is configured to select one or more E-PDCCH candidates in the corresponding localized E-PDCCH candidate set under various aggregation levels, and occupy the E-PDCCH of the localized E-PDCCH by using the selected E-PDCCH candidate
  • the time-frequency resource corresponding to the CCE sends an E-PDCCH to the terminal.
  • the network side device described in the present invention may be, but is not limited to, e B (base station).
  • the network side device provided by the present invention allocates an E-CCE occupying a localized E-PDCCH to each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to each aggregation level before transmitting the E-PDCCH to the terminal. That is, the terminal is allocated a localized E-PDCCH search space (UESS). And the localized E-PDCCH candidate set under each aggregation level of one terminal is dispersed on the time-frequency resource that the terminal can use for transmitting the E-PDCCH, so that the localized E-PDCCH can obtain better frequency selective scheduling.
  • UESS E-PDCCH search space
  • the network side device may further include a first E-PDCCH candidate number configuration module, configured to determine, according to an agreement with the foregoing terminal, an E-PDCCH candidate number in a localized E-PDCCH candidate set corresponding to each aggregation level; Or the second E-PDCCH candidate number configuration module is configured to determine the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to each aggregation level, and determine the localized E corresponding to each aggregation level.
  • the number of E-PDCCH candidates in the -PDCCH candidate set is transmitted to the above terminal.
  • the localized E-PDCCH search space determining module 1001 may be specifically used according to the terminal.
  • the network side device may further include a starting location configuration module of the first localized E-PDCCH candidate set, configured to determine a localized E corresponding to each aggregation level according to the RNTI of the terminal according to a manner agreed with the terminal. - an offset parameter of a starting position of the PDCCH candidate set; determining a starting position of the corresponding localized E-PDCCH candidate set for each aggregation level according to the offset parameter.
  • the network side device may further include a starting location configuration module of the second localized E-PDCCH candidate set, configured to determine, according to the RNTI of the foregoing terminal, a starting location of a localized E-PDCCH candidate set corresponding to each aggregation level.
  • Offset parameter determining a starting position of a corresponding localized E-PDCCH candidate set for each aggregation level according to the offset parameter; sending an offset parameter of a starting position of the corresponding localized E-PDCCH candidate set under each aggregation level Give the above terminal.
  • the network side device may further include a start location configuration module of the third localized E-PDCCH candidate set, configured to determine a localized E- corresponding to each aggregation level according to the predetermined offset parameter association information and the RNTI of the terminal.
  • the offset parameter of the starting position is sent to the terminal, so that the terminal determines the offset parameter of the starting position of the corresponding localized E-PDCCH candidate set in the other aggregation level according to the offset parameter association information.
  • the number of the initial E-CCEs in the E-PDCCH candidate is an integer multiple of the aggregation level corresponding to the localized E-PDCCH candidate set, and each E-PDCCH in the localized E-PDCCH candidate set in the aggregation level L
  • the number of the E-CCE of the localized E-PDCCH occupied by the PDCCH candidate can be expressed by the following formula.
  • the E-CCE number of the localized E-PDCCH occupied by each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L can be determined by the following formula. So + offset (L) nL + ⁇ floor ( N ' t eCCE
  • the present invention further provides a network side device, which is implemented as shown in FIG. 13 , and the specific implementation structure is as follows:
  • the localized E-PDCCH search space determining module 2001 is configured to be used according to the terminal in the current subframe to transmit the E-PDCCH.
  • Each E-PDCCH candidate in the candidate set occupies the number of the E-CCE of the localized E-PDCCH.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to the aggregation level L is equal.
  • the distributed E-PDCCH search space determining module 2002 is configured to determine, according to the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the terminal at the aggregation level L, the frequency domain discontinuous transmission corresponding to the terminal at an aggregation level.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L.
  • the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L means that each E-PDCCH candidate in the localized E-PDCCH candidate set occupies the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the aggregation level L. Therefore, the distributed E-PDCCH determined by the terminal is determined.
  • the time-frequency resources of the search space inherit the advantages of the localized E-PDCCH search space configuration, and can obtain better frequency selection scheduling and achieve frequency diversity gain. On this basis, the resource utilization of the system is also improved.
  • the time-frequency resource occupied by one distributed E-PDCCH candidate of the corresponding distributed E-PDCCH candidate set in the aggregation level is the multiple E-PDCCH candiate of the localized E-PDCCH candidate set corresponding to the aggregation level L, A combination of some or all of the time-frequency resources occupied by each E-PDCCH candiate.
  • the present invention also provides a terminal, the structure of which is shown in Figure 14.
  • the specific implementation structure is as follows:
  • the localized E-PDCCH search space determining module 3001 is configured to: according to the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that can be used for transmitting the E-PDCCH in the current subframe, and corresponding to each aggregation level The number of E-PDCCH candidates in the localized E-PDCCH candidate set, and the number of E-CCEs occupying the localized E-PDCCH of each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to each aggregation level.
  • a localized E-PDCCH candidate corresponding to the aggregation level The absolute value of the number difference of the starting E-CCEs between any two adjacent E-PDCCH candidates in the set is equal.
  • the E-PDCCH receiving module 3002 is configured to receive the E-PDCCH on the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH occupied by each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the at least one aggregation level. .
  • the terminal provided by the present invention determines, before receiving the E-PDCCH, that each E-PDCCH candidate in the localized E-PDCCH candidate set in each aggregation level occupies the E-CCE of the localized E-PDCCH, that is, determines that the terminal is localized E- PDCCH search space (UESS). And the localized E-PDCCH candidate set under each aggregation level of a terminal is dispersed on the time-frequency resource that the terminal can use to transmit the E-PDCCH, so that the localized E-PDCCH can obtain better frequency selective scheduling.
  • the terminal provided by the present invention may further include a first E-PDCCH candidate number configuration module, configured to determine an E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to each aggregation level according to an agreement with the network side device.
  • the second E-PDCCH candidate number configuration module is configured to receive the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to each aggregation level sent by the network side device.
  • the localized E-PDCCH search space determining module 3001 may be specifically configured to: according to the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that the terminal can use to transmit the E-PDCCH in the current subframe.
  • the number of E-PDCCH candidates in the localized E-PDCCH candidate set corresponding to each aggregation level, and the starting position of the localized E-PDCCH candidate set corresponding to each aggregation level, and the corresponding corresponding to each aggregation level is determined.
  • Localized E-PDCCH candidate The number of E-CCEs in the E-PDCCH candidate that occupy the localized E-PDCCH.
  • the terminal may further include a starting location configuration module of the first localized E-PDCCH candidate set, configured to determine a localized E corresponding to each aggregation level according to the RNTI of the terminal according to a manner agreed with the network side device. - an offset parameter of a starting position of the PDCCH candidate set; determining a starting position of the corresponding localized E-PDCCH candidate set for each aggregation level according to the offset parameter.
  • the terminal may further include a starting location configuration module of the second localized E-PDCCH candidate set, configured to receive a partial offset of a starting location of the localized E-PDCCH candidate set corresponding to each aggregation level sent by the network side device. Shifting parameters; determining a starting position of a corresponding localized E-PDCCH candidate set for each aggregation level according to the offset parameter.
  • the terminal may further include a starting location configuration module of the third localized E-PDCCH candidate set, configured to receive a partial offset of a localized E-PDCCH candidate set corresponding to the aggregation level sent by the network side device.
  • the shift parameter is determined according to the predetermined offset parameter association information, and the offset parameter of the start position of the corresponding localized E-PDCCH candidate set under other aggregation levels is determined; according to the corresponding localized E-PDCCH candidate set under each aggregation level
  • the offset parameter of the starting position determines the corresponding under each aggregation level The starting position of the localized E-PDCCH candidate set.
  • the number difference of the starting E-CCEs between the E-PDCCH candidates is an integer multiple of the aggregation level corresponding to the localized E-PDCCH candidate set, and each E in the localized E-PDCCH candidate set corresponding to the aggregation level L
  • the number of the E-CCE of the localized E-PDCCH occupied by the PDCCH candidate can be expressed by the following formula:
  • the number of the starting E-CCEs between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set in the aggregation level L is the aggregation level L and the E-CCE corresponding to one PRB pair
  • the number of the E-CCE of the localized E-PDCCH occupied by each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L may be as follows: For the explanation of the formula, reference may be made to the description of the above embodiment, and details are not described herein again.
  • the present invention also provides a terminal, and its implementation structure is as shown in FIG. 15, and the specific implementation structure is as follows:
  • the localized E-PDCCH search space determining module 4001 is configured to: according to the number of E-CCEs of the localized E-PDCCH corresponding to the time-frequency resources that the terminal can use to transmit the E-PDCCH in the current subframe, and corresponding to the aggregation level L
  • the number of E-PDCCH candidates in the localized E-PDCCH candidate set determines the number of E-CCEs occupied by the localized E-PDCCH for each E-PDCCH candidate in the localized E-PDCCH candidate set corresponding to the aggregation level L.
  • the absolute value of the initial E-CCE difference between any two adjacent E-PDCCH candidates in the corresponding localized E-PDCCH candidate set at the aggregation level L is equal.
  • the distributed E-PDCCH search space determining module 4002 is configured to determine, according to the time-frequency resources occupied by the localized E-PDCCH candidate set corresponding to the aggregation level L of the terminal, the occupied E-PDCCH candidate set corresponding to the aggregation level. Time-frequency resources.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L.
  • the time-frequency resource occupied by the corresponding localized E-PDCCH candidate set in the aggregation level L refers to the time-frequency resource corresponding to the E-CCE of the localized E-PDCCH in each localized E-PDCCH candidate set.
  • the time-frequency resource occupied by the corresponding distributed E-PDCCH candidate set in the aggregation level is all or part of the time-frequency resource occupied by the localized E-PDCCH candidate set corresponding to the aggregation level L. Therefore,
  • the time-frequency resources of the distributed E-PDCCH search space determined by the terminal inherit the advantages of the localized E-PDCCH search space configuration, and can obtain better frequency selection scheduling and achieve frequency diversity gain. On this basis, the resource utilization of the system is also improved.
  • the time-frequency resource occupied by one distributed E-PDCCH candidate of the corresponding distributed E-PDCCH candidate set in the aggregation level is the multiple E-PDCCH candiate of the localized E-PDCCH candidate set corresponding to the aggregation level L, A combination of some or all of the time-frequency resources occupied by each E-PDCCH candiate.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

La présente invention se rapporte à un procédé de transmission de canal de commande de liaison descendante physique amélioré (E-PDCCH pour Enhanced Physical Downlink Control Channel) ainsi qu'à un procédé et à un appareil de détermination de ressources temps - fréquence. Le procédé de transmission consiste à : déterminer un numéro de série d'un élément de canal de commande amélioré (E-CCE pour Enhanced Control Channel Element) d'un canal E-PDCCH localisé occupé par chaque canal E-PDCCH possible dans un ensemble correspondant de canaux E-PDCCH localisés possibles selon chaque niveau d'agrégation, une valeur absolue d'une différence de numéros de série des éléments E-CCE de départ entre deux canaux E-PDCCH quelconques adjacents dans un ensemble de canaux E-PDCCH localisés possibles étant identique ; et sélectionner des ressources temps - fréquence d'un ou plusieurs canaux E-PDCCH possibles de l'ensemble correspondant de canaux E-PDCCH localisés possibles selon chaque niveau d'agrégation afin d'envoyer le canal E-PDCCH à un terminal. Par conséquent, le canal E-PDCCH localisé arrive à une meilleure programmation à sélectivité en fréquence.
PCT/CN2013/075421 2012-05-10 2013-05-09 Procédé de transmission de canal e-pdcch ainsi que procédé et appareil de détermination de ressources temps - fréquence WO2013166980A1 (fr)

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CN201210147819.1 2012-05-10

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