Design for a ue specific search space and a common search space in a wide coverage enhancement

Patent metadata

Field	Value
Publication number	US-2019104503-A1
Application number	US-201816133360-A
Country	US
Kind code	A1
Filing date	Sep 17, 2018
Priority date	Sep 15, 2017
Publication date	Apr 4, 2019
Grant date	—

Abstract

This disclosure relates to implementations to support UE-specific search space (UESS) for wide coverage enhancement (WCE). One implementation relates to an apparatus of a user equipment (UE) comprising: an interface configured to receive configuration information of a UE specific Search Space (UESS) and a common search space (CSS) for enhanced Physical Downlink Control Channel (ePDCCH) from a radio-frequency (RF) circuitry; and a processor configured to monitor the UESS and the CSS for ePDCCH transmission; wherein the interface and/or the processor is adaptable to support a wideband coverage enhancement (WCE).

First claim

What is claimed is:

1 . An apparatus of a user equipment (UE) comprising:
an interface configured to receive configuration information of a UE specific Search Space (UESS) and a Common Search Space (CSS) for enhanced Physical Downlink Control Channel (ePDCCH) from a radio-frequency (RF) circuitry; and a processor configured to monitor the UESS and the CSS for ePDCCH transmission; wherein the interface and/or the processor is adaptable to support a wideband coverage enhancement (WCE), and the configuration information includes information for configuration of one or more of: candidate Search Space (SS), Resource Block (RB) for the UESS and the CSS for ePDCCH transmission, search space reduction, or transmission of Downlink Control Information (DCI).

2 . The apparatus of claim 1 , wherein the UESS and the CSS for ePDCCH transmission are indicated by a parameter startSymbol, which is indicated by Control Format Indicator (CFI) or a pdsch-Start parameter, or is configured by an evolved Node-B (eNB) through one of a System Information Block 1 (SIB1), Master Information Block (MIB) or Radio Resource Control (RRC) message, wherein the parameter startSymbol is applicable to the CSS ePDCCH and associated Physical Downlink Control Channel (PDSCH) and/or the USS ePDCCH and associated PDSCH.

3 . The apparatus of claim 1 , wherein the UESS and the CSS for ePDCCH transmission are indicated by a parameter setConfigToReleaseList and a parameter setConfigToAddModList, wherein the two parameters are pre-defined if two ePDCCH sets are configured for the UESS and the CSS for ePDCCH, or the two parameters are configured by an evolved Node-B (eNB) through one of SIB1, MIB or RRC message.

4 . The apparatus of claim 1 , wherein the UESS and the CSS for ePDCCH transmission are indicated by a parameter EPDCCH-SetConfigId, which takes a value from 0, 1, 2, or 3, while two ePDCCH sets configured for the UESS and the CSS for ePDCCH are associated together.

5 . The apparatus of claim 4 , wherein the parameter EPDCCH-SetConfigId includes:
setConfigId, which is pre-defined, and wherein the set configuration is implicitly associated with the configuration sequence; transmissionType, which is configured as a legacy system, or is confined to one set; numberPRBPairs, which is pre-defined for each set, or alternatively is configured by an evolved Node-B (eNB) through SIB1 or MIB or RRC message; resourceBlockAssignment, which is defined as a legacy resource allocation, or alternatively is pre-defined in a unit of N contiguous distributed/localized Virtual Resource Blocks (VRBs), wherein N is 4 or 8; or alternatively, resourceBlockAssignment is hard coded, or pre-defined, and is blindly detected together with candidate search spaces.

6 . The apparatus of claim 1 , wherein the UESS and the CSS for ePDCCH comprise two ePDCCH sets and the number of the candidate search spaces is equal to or less than that for legacy CSS PDCCHs,
for Aggregation Level (AL)=64, the number of the candidate search spaces is generated based on AL=32 within one ePDCCH set and repeats in another ePDCCH set; and for AL<64, the number of the candidate search spaces is generated based on AL/2 within one ePDCCH set and repeats in another ePDCCH set or is alternatively generated based on AL within one ePDCCH set.

7 . The apparatus of claim 1 , wherein the maximum AL for localized ePDCCH is enhanced to Aggregation Level (AL)=32.

8 . The apparatus of claim 1 , wherein the UESS and the CSS for ePDCCH comprise two ePDCCH sets, each containing 8 RBs, and the two ePDCCH sets are configured by an evolved Node-B (eNB) with the following configuration:
Maximum Aggregation Level (AL) is 64 for the UE, that is, one candidate SS for AL=64, two candidate SSs for AL=32, two/four candidate SSs for AL=16; or alternatively Maximum AL is 32 for the UE, that is, two candidate SSs for AL=32, two/four candidate SSs for AL=16, two/four candidate SSs for AL=8; The remaining candidates are equally divided for smaller AL; and The aggregation level is 4 levels or 5 levels.

9 . The apparatus of claim 1 , wherein the candidate search space reuses two distributed ePDCCH sets, while one candidate search space having an Aggregation Level of 64 (AL=64) is added, and one candidate having a smaller AL is decreased by one.

10 . The apparatus of claim 1 , wherein the candidate search space focuses on larger Aggregation Level (AL) with 6 level ALs, where AL ranges from AL=2 to AL=64.

11 . The apparatus of claim 1 , wherein the UESS and the CSS for ePDCCH comprise four ePDCCH sets, each containing 8 RBs, and the four ePDCCH sets are configured by an evolved Node-B (eNB) with the following configuration:
Two candidate SSs for Aggregation Level (AL)=64; Four candidate SSs for AL=32; Four candidate SSs for AL=16; The remaining candidate SSs are equally divided for smaller AL; The aggregation level is 4 levels or 5 levels; For AL=64, two ePDCCH sets are associated by default, and within the two ePDCCH sets, the ePDCCH is generated based on AL=32 in one set, and repeated for the other set.

12 . The apparatus of claim 1 , wherein the UESS and the CSS for ePDCCH comprise two ePDCCH sets, each containing 16 RBs, and the two ePDCCH sets are configured by an evolved Node-B (eNB) with the following configuration:
Two candidate SSs for Aggregation Level (AL)=64; Four candidate SSs for AL=32; Four candidate SSs for AL=16; The remaining candidate SSs are equally divided for smaller AL; The aggregation level is 4 levels or 5 levels; The enhanced Control Channel Element (eCCE) is numbered within one set, and the further eCCE (FeCCE) is obtained by concatenating across multiple eCCEs.

13 . The apparatus of claim 1 , wherein a legacy PDCCHpdcch-candidateReductions parameter is reused in the UESS and the CSS for ePDCCH transmission, or alternatively a pdcch-candidateReductionAL6 parameter is introduced to the UESS and the CSS for ePDCCH transmission.

14 . The apparatus of claim 1 , wherein the transmission of DCI supports a legacy DCI for WCE UE scheduling; and
Format 1x is utilized for the WCE UE scheduling with the following configuration: Format 1 for single input multiple output (SIMO) PDSCH scheduling with non-contiguous Resource Allocation (RA), which is supported for the WCE UE scheduling; Format 1A for SIMO PDSCH scheduling with contiguous RA, which is supported for the WCE UE scheduling; Format 1B for close-loop single rank transmission with contiguous RA for the WCE UE scheduling; or Format 1D for compact scheduling of one PDSCH codeword with precoding and power offset information.

15 . An apparatus of a user equipment (UE) comprising:
an interface configured to receive configuration information of a Search Space (SS) for Machine-type communications Physical Downlink Control Channel (MPDCCH) from a radio-frequency (RF) circuitry; and a processor configured to monitor the SS for an MPDCCH transmission; wherein the interface and/or the processor is adaptable to support a frequency hopping Internet of Things (IoT) system, and the MPDCCH transmission is restricted with starting N1 downlink subframes, N1 being configured by an evolved Node-B (eNB) through high layer signaling, and the starting N1 downlink subframes are less than the length of dwell time of a data channel.

16 . The apparatus of claim 15 , wherein the time position for the SS for MPDCCH is spanned on the whole downlink subframe within one data channel.

17 . The apparatus of claim 15 , wherein a PDSCH/PUSCH subframe in the MPDCCH transmission is sc

Assignees

• Intel Ip Corp

Inventors

• Niu Huaning
• Chang Wenting
• Talarico Salvatore
• Lee Anthony

Classifications

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04W72/12

  Wireless traffic scheduling · CPC title

• H04L25/0202

  Channel estimation · CPC title