Uplink/downlink configuration information notification and acquisition method, base station and user equipment

Patent metadata

Field	Value
Publication number	US-2016249337-A1
Application number	US-201415025087-A
Country	US
Kind code	A1
Filing date	May 23, 2014
Priority date	Sep 27, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

A method for notifying uplink and downlink configuration information is provided, including: a base station transmits a DCI format to UE, the DCI format bearing uplink and downlink configuration information being for indicating uplink and downlink configuration; and the base station sends the DCI format through a PDCCH, and sends a search space of the PDCCH including a common search space and/or a UE group common search space. A method for acquiring uplink and downlink configuration information is provided, including: UE performs PDCCH blind detection in a search space candidate of a subframe candidate, and acquires a DCI format, wherein the subframe candidate is for transmitting a DCI format bearing uplink and downlink configuration information. A base station and UE are also provided.

First claim

What is claimed is:

1 . A method for notifying uplink and downlink configuration information, comprising:
transmitting, by a base station, a Downlink Control Information (DCI) format to User Equipment (UE), the DCI format bearing uplink and downlink configuration information configured to indicate uplink and downlink configuration; and sending, by the base station, the DCI format bearing the uplink and downlink configuration information through a Physical Downlink Control Channel (PDCCH), and sending a search space of the PDCCH, wherein the search space comprises a common search space and/or a UE group common search space.

2 . The method according to claim 1 , wherein
the UE group common search space is a search space determined according to a common Radio Network Temporary Identity (RNTI) of a UE group, or a search space configured for the UE group by high-layer signalling, or a predefined UE group search space; or the DCI format bearing the uplink and downlink configuration information has a same number of bits as a UE-specific DCI format X, or has a same number of bits as one of DCI formats sent in the common search space by the base station, the X being a predefined value.

3 . (canceled)

4 . The method according to claim 1 , further comprising:
configuring, by the base station, a sending period and a sending subframe of the DCI format bearing the uplink and downlink configuration information through high-layer signalling; or, agreeing on the sending period and the sending subframe by a sending party and a receiving party; wherein there is one or multiple sending subframes.

5 . The method according to claim 4 , wherein when there are multiple sending subframes, sending, by the base station, the DCI format comprises:
selecting, by the base station, one of the multiple sending subframes for sending the DCI format when the base station sends the DCI format on a first radio frame of the sending period.

6 . The method according to claim 1 , wherein when the base station sends a UE-specific DCI format on the subframe where the DCI format bearing the uplink and downlink configuration information is sent, a search space of the sent UE-specific DCI format comprises a common search space, and/or a UE group common search space, and/or a UE-specific search space; wherein
when the UE-specific DCI format is sent in the UE group common search space, the UE-specific DCI format is a DCI format X, wherein the UE-specific DCI format X has a same number of bits as the DCI format bearing the uplink and downlink configuration information; or when the UE-specific DCI format is sent in the UE-specific search space, the UE-specific DCI format is a DCI format Y, and the UE-specific DCI format Y has a different number of bits from the DCI format bearing the uplink and downlink configuration information; wherein
the DCI format bearing the uplink and downlink configuration information is scrambled through a RNTI of a UE group, and the UE-specific DCI format is scrambled through an RNTI of the UE.

7 - 8 . (canceled)

9 . The method according to claim 1 , wherein the DCI format comprises a plurality of control fields, wherein at least one control field comprises the uplink and downlink configuration information;
wherein the at least one control field comprising the uplink and downlink configuration information further comprises dynamic indication information of Channel State Information (CSI)/Interference Measurement (IM).

10 . (canceled)

11 . The method according to claim 9 , wherein the base station carries dynamic indication information of CSI/IM in the UE-specific DCI format; or,
when the base station sends the UE-specific DCI format on a subframe where the DCI format bearing the uplink and downlink configuration information is not sent, the base station carries dynamic indication information of CSI/IM in the UE-specific DCI format.

12 . The method according to claim 9 , wherein the dynamic indication information of CSI/IM comprises, but not limited to, group information of CSI/IM, and subframe information of CSI/IM;
wherein the group information of CSI/IM is configured to indicate a CSI measurement/reporting subframe set to which a measurement result obtained by CSI/IM measurement performed by the UE based on CSI/IM resources belongs, wherein the CSI/IM resources are configured into two groups by high-layer configuration, wherein one group corresponds to CSI measurement/reporting subframe set 1, and the other group corresponds to CSI measurement/reporting subframe set 1 or 2; and the subframe information of CSI/IM is configured to indicate a subframe having CSI/IM resources based on which the UE performs CSI/IM measurement, wherein the CSI/IM resources are configured into N groups by high-layer configuration, wherein one group corresponds to CSI measurement/reporting subframe set 1, and the remaining N−1 groups correspond to CSI measurement/reporting subframe set 2.

13 - 14 . (canceled)

15 . The method according to claim 1 , wherein transmitting, by the base station, the DCI format to the UE comprises:
in a carrier aggregation system, when cross-carrier scheduling is not configured for each serving cell, sending, by the base station, the DCI format bearing the uplink and downlink configuration information in a common search space and a UE group common search space of a first primary serving cell Pcell-X and a UE group common search space of a secondary serving cell Scell; or, sending, by the base station, the DCI format bearing the uplink and downlink configuration information in a common search space and a UE group common search space of a Pcell-X; or, sending, by the base station, the DCI format bearing the uplink and downlink configuration information in a common search space and a UE group common search space of a Pcell-X, a common search space and a UE group common search space of a second primary serving cell Pcell-Y and a UE group common search space of a Scell; or, sending, by the base station, the DCI format bearing the uplink and downlink configuration information in a common search space and a UE group common search space of a Pcell-X, and a common search space and a UE group common search space of a Pcell-Y.

16 . A method for acquiring uplink and downlink configuration information, comprising:
performing, by User Equipment (UE), Physical Downlink Control Channel (PDCCH) blind detection in a search space candidate of a subframe candidate, and acquiring a Downlink Control Information (DCI) format, wherein the subframe candidate is configured to transmit a DCI format bearing uplink and downlink configuration information.

17 . The method according to claim 16 , further comprising: when the obtained DCI format bears the uplink and downlink configuration information, acquiring, by the UE, dynamic indication information of Channel State Information (CSI)/Interference Measurement (IM) from the DCI format.

18 - 21 . (canceled)

22 . The method according to claim 16 , wherein
a search space candidate of the DCI format bearing the uplink and downlink configuration information comprises a common search space and/or a UE group common search space; wherein the UE group common search space is a search space determined according to a common Radio Network Temporary Identity (RNTI) of a UE group, or a search space configured for a UE group by high-layer signalling, or a predefined UE group search space; or a search space candidate of the UE-specific DCI format comprises: a common search space, and/or a UE group common search space, and/or a UE-specifi

Assignees

• Zte Corp

Inventors

• Liang Chunli
• Dai Bo
• Li Yungok
• Xia Shuqiang

Classifications

• H04W72/23

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

• H04L5/0053

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

• H04L5/1469

  using time-sharing · CPC title

• H04L5/0094 Primary

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title