Information sending and blind detection method and device

Patent metadata

Field	Value
Publication number	US-9408190-B2
Application number	US-201214356589-A
Country	US
Kind code	B2
Filing date	Jul 11, 2012
Priority date	Nov 7, 2011
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

Disclosed are an information sending and blind detection method and device, relating to the technical field of wireless communication technologies and for realizing a new information sending and blind detection method over a physical downlink control channel (PDCCH). In the present application, a base station determines a plurality of preset blind detection candidate sets, each blind detection candidate set containing at least one PDCCH candidate resource; and uses the PDCCH Candidates in at least one blind detection candidate set of the plurality of blind detection candidate sets to send control information to a terminal. The terminal determines a plurality of preset blind detection candidate sets, and performs blind detection of control information over the PDCCH Candidates in each blind detection candidate set of the plurality of blind detection candidate sets. By applying the present applications, a new information sending and blind detection method over a PDCCH is realized.

First claim

What is claimed is:

1. A method for transmitting information, comprising:
determining, by a base station, a plurality of preset sets of blind detection candidates, each of which comprises one or more Physical Downlink Control Channel, PDCCH, candidates; and
transmitting, by the base station, control information to a user equipment over the PDCCH candidates in at least one of the plurality of sets of blind detection candidates;
wherein the plurality of sets of blind detection candidates comprise a first set of blind detection candidates and a second set of blind detection candidates; and
the base station transmits Downlink Control Information, DCI, to the user equipment over the PDCCH candidates in the first set of blind detection candidates with a prescribed data modulation scheme; and the base station transmits the DCI to the user equipment over the PDCCH candidates in the second set of blind detection candidates with a data modulation scheme determined by the base station;
wherein the first set of blind detection candidates comprises all of PDCCH candidates in a common search space among enhanced PDCCHs; or all of PDCCH candidates in a common search space among enhanced PDCCHs and a part or all of PDCCH candidates in a UE-specific search space among enhanced PDCCHs; or a part or all of PDCCH candidates in a UE-specific search space among enhanced PDCCHs; and
the second set of blind detection candidates comprises a part of PDCCH candidates in a UE-specific search space among enhanced PDCCHs.

2. The method according to claim 1 , wherein the data modulation scheme determined by the base station is a data modulation scheme determined by the base station according to channel state information fed back by the user equipment, and the method further comprises:
notifying, by the base station, the user equipment of the determined data modulation scheme.

3. The method according to claim 1 , wherein before the base station transmits the DCI to the user equipment over the PDCCH candidates in the first set of blind detection candidates, the method further comprises:
determining, by the base station, a transmission mode in which the DCI is transmitted over the first set of blind detection candidates according to a preset correspondence relationship between sets of blind detection candidates and transmission modes and/or antenna port configuration information; and
the transmitting the DCI to the user equipment over the PDCCH candidates in the first set of blind detection candidates comprises:
transmitting, by the base station, the DCI to the user equipment over the PDCCH candidates in the first set of blind detection candidates in the determined transmission mode.

4. The method according to claim 1 , wherein before the base station transmits the DCI to the user equipment over the PDCCH candidates in the second set of blind detection candidates, the method further comprises:
determining, by the base station, a transmission mode in which the DCI is transmitted over the second set of blind detection candidates; and
the transmitting the DCI to the user equipment over the PDCCH candidates in the second set of blind detection candidates comprises:
transmitting, by the base station, the DCI to the user equipment over the PDCCH candidates in the second set of blind detection candidates in the determined transmission mode.

5. The method according to claim 1 , wherein the prescribed data modulation scheme is the modulation scheme of Quadrature Phase Shift Keying, QPSK.

6. The method according to claim 1 , wherein the data modulation scheme determined by the base station is the modulation scheme of QPSK or 16QAM or 64QAM.

7. A method for blind detection of information, comprising:
determining, by a user equipment, a plurality of preset sets of blind detection candidates, each of which comprises one or more Physical Downlink Control Channel, PDCCH, candidates; and
performing, by the user equipment, blind detection of control information over the PDCCH candidates in the respective sets among the plurality of sets of blind detection candidates;
wherein the plurality of sets of blind detection candidates comprise a first set of blind detection candidates and a second set of blind detection candidates; and the performing, by the user equipment, blind detection of the control information over the PDCCH candidates in the respective sets among the plurality of sets of blind detection candidates comprises:
performing, by the user equipment, blind detection of Downlink Control Information, DCI, over the PDCCH candidates in the first set of blind detection candidates with a prescribed data modulation scheme; and
performing, by the user equipment, blind detection of the DCI over the PDCCH candidates in the second set of blind detection candidates with a data modulation scheme notified by the base station;
wherein the first set of blind detection candidates comprises all of PDCCH candidates in a common search space among enhanced PDCCHs; or all of PDCCH candidates in a common search space among enhanced PDCCHs and a part or all of PDCCH candidates in a UE-specific search space among enhanced PDCCHs; or a part or all of PDCCH candidates in a UE-specific search space among enhanced PDCCHs; and
the second set of blind detection candidates comprises a part of PDCCH candidates in a UE-specific search space among enhanced PDCCHs.

8. The method according to claim 7 , wherein the prescribed data modulation scheme is the modulation scheme of Quadrature Phase Shift Keying, QPSK.

9. The method according to claim 7 , wherein the data modulation scheme notified of by the base station is the modulation scheme of QPSK or 16QAM or 64QAM.

10. The method according to claim 7 , wherein determining, by the user equipment, the plurality of preset sets of blind detection candidates comprises:
receiving, by the user equipment, information transmitted by the base station about PDCCH candidates in the respective sets among the plurality of sets of blind detection candidates and determining the plurality of sets of blind detection candidates from the information.

11. A base station, comprising:
a resource determination unit configured to determine a plurality of preset sets of blind detection candidates, each of which comprises one or more Physical Downlink Control Channel, PDCCH, candidates; and
an information transmission unit configured to transmit control information to a user equipment over the PDCCH candidates in at least one of the plurality of sets of blind detection candidates;
wherein the plurality of sets of blind detection candidates comprise a first set of blind detection candidates and a second set of blind detection candidates; and the information transmission unit is further configured:
to transmit Downlink Control Information, DCI, to the user equipment over the PDCCH candidates in the first set of blind detection candidates with a prescribed data modulation scheme; and
to transmit the DCI to the user equipment over the PDCCH candidates in the second set of blind detection candidates with a data modulation scheme determined by the base station;
wherein the first set of blind detection candidates comprises all of PDCCH candidates in a common search space among enhanced PDCCHs; or all of PDCCH candidates in a common search space among enhanced PDCCHs and a part or all of PDCCH candidates in a UE-specific search space among enhanced PDCCHs; or a part or all of PDCCH candidates in a UE-specific search space among enhanced PDCCHs; and
the second set of blind detection candidates comprises a part of PDCCH candidates in a UE-specific search space among enhanced PDCCHs.

12. The base station according to

Assignees

• Pan Xueming
• China Academy Telecommunications Technology

Inventors

• Pan Xueming

Classifications

• H04L1/0091

  arrangements specific to receivers, e.g. format detection (detection of data rate H04L25/0262; detection of coding rate H04L1/0046) · CPC title

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title

• H04W72/04 Primary

  Wireless resource allocation · CPC title