Method and device for indicating pilot state

• US 9,203,487 B2
• Filed: 03/23/2015
• Issued: 12/01/2015
• Est. Priority Date: 09/26/2012
• Status: Expired due to Fees

• Current Assignee: Apex Net LLC (IP Edge LLC)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wang, Fan, Ma, Xueli, LI, Bingzhao
• Primary Examiner(s): PHU, PHUONG M
• Application Number:
  US14/666,150
• Publication Number:
  US 20150195017A1
• Time in Patent Office: 253 Days
• Field of Search: 376/260, 376/346, 376/267, 376/299, 376/347, 370/329, 375/260, 375/346, 375/267, 375/299, 375/347
• US Class Current: 1/1
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals

Abstract

The present invention discloses a method for indicating pilot state, a radio network controller. The method includes: acquiring, by an RNC, state information of a scheduled non-precoded pilot, where the state information of the scheduled non-precoded pilot indicates activated state or deactivated state of the scheduled non-precoded pilot; and sending, by the RNC, 4Tx MIMO mode configuration signaling to a UE, where the configuration signaling carries the state information of the scheduled non-precoded pilot, so that the UE acquires state of the scheduled non-precoded pilot according to the state information of the scheduled non-precoded pilot when being configured to 4Tx MIMO mode. The method for indicating pilot state and the radio network controller according to embodiments of the present invention can reduce physical-layer signaling overheads and reduce a delay in acquiring state of a scheduled non-precoded pilot by the UE in 4Tx MIMO mode.

Claims

1. A method for indicating a pilot state, comprising:

acquiring, by a radio network controller (RNC), state information of a scheduled non-precoded pilot, wherein the state information of the scheduled non-precoded pilot indicates an activated state or a deactivated state of the scheduled non-precoded pilot; and

sending, by the RNC, first 4Tx multi-input multi-output (MIMO) mode configuration signaling to a user equipment (UE), wherein the first 4Tx MIMO mode configuration signaling carries the state information of the scheduled non-precoded pilot, wherein the UE acquires a state of the scheduled non-precoded pilot according to the state information of the scheduled non-precoded pilot when being configured to 4Tx MIMO mode;

wherein the RNC is a serving radio network controller (SRNC), and the acquiring, by the RNC the state information of the scheduled non-precoded pilot comprises;

receiving, by the SRNC, the state information of the scheduled non-precoded pilot from a base station;

or,

receiving, by the SRNC, the state information of the scheduled non-precoded pilot from a drift radio network controller (DRNC), wherein the state information of the scheduled non-precoded pilot is acquired by the DRNC from state information of the scheduled non-precoded pilot sent by a base station.

2. The method according to claim 1, wherein the state information of the scheduled non-precoded pilot sent by the base station is comprised in a resource state indication message sent by the base station.

3. The method according to claim 2, wherein the state information of the scheduled non-precoded pilot sent by the base station is state information of the scheduled non-precoded pilot sent after the base station changes a state of the scheduled non-precoded pilot.

4. A radio network controller, comprising:

a processor, configured to acquire state information of a scheduled non-precoded pilot and determine first 4Tx multi-input multi-output (MIMO) mode configuration signaling, wherein the state information of the scheduled non-precoded pilot indicates an activated state or a deactivated state of the scheduled non-precoded pilot, and the configuration signaling carries the state information of the scheduled non-precoded pilot;

a transmitter, configured to send the first 4Tx multi-input multi-output (MIMO) mode configuration signaling to a user equipment (UE), wherein the UE acquires a state of the scheduled non-precoded pilot according to the state information of the scheduled non-precoded pilot when being configured to a 4Tx MIMO mode; and

a receiver configured to;

receive the state information of the scheduled non-precoded pilot from a base station;

or,

receive the state information of the scheduled non-precoded pilot from a drift radio network controller (DRNC) wherein the state information of the scheduled non-precoded pilot is acquired by the DRNC from state information of the scheduled non-precoded pilot sent by a base station;

wherein the processor is configured to acquire the state information of the scheduled non-precoded pilot from the state information of the scheduled non-precoded pilot received by the receiver.

5. The radio network controller according to claim 4,

wherein the receiver is further configured to receive a resource state indication message sent by the base station, wherein the resource state indication message comprises the state information of the scheduled non-precoded pilot;

and

the processor is further configured to acquire the state information of the scheduled non-precoded pilot from the resource state indication message.

6. The radio network controller according to claim 5, wherein the receiver is further configured to:

after the base station changes a state of the scheduled non-precoded pilot, receive the state information of the scheduled non-precoded pilot from the base station.

7. A system for indicating a pilot state, comprising:

a base station; and

a radio network controller, comprising;

a processor, configured to acquire state information of a scheduled non-precoded pilot and determine first 4Tx multi-input multi-output (MIMO) mode configuration signaling, wherein the state information of the scheduled non-precoded pilot indicates an activated state or a deactivated state of the scheduled non-precoded pilot, and the configuration signaling carries the state information of the scheduled non-precoded pilot;

a transmitter, configured to send the first 4Tx multi-input multi-output (MIMO) mode configuration signaling to a user equipment (UE), so that the UE acquires state of the scheduled non-precoded pilot according to the state information of the scheduled non-precoded pilot when being configured to 4Tx MIMO mode; and

a receiver, configured to;

receive the state information of the scheduled non-precoded pilot from the base station;

or,

receive the state information of the scheduled non-precoded pilot from a drift radio network controller (DRNC), wherein the state information of the scheduled non-precoded pilot is acquired by the DRNC from state information of the scheduled non-precoded pilot sent by the base station; and

wherein the processor is configured to acquire the state information of the scheduled non-precoded pilot from the state information of the scheduled non-precoded pilot received by the receiver.

8. The system according to claim 7, wherein:

the receiver is configured to receive a resource state indication message sent by the base station, wherein the resource state indication message comprises the state information of the scheduled non-precoded pilot; and

the processor is configured to acquire the state information of the scheduled non-precoded pilot from the resource state indication message.

9. The system according to claim 8, wherein the receiver is configured to:

after the base station changes a state of the scheduled non-precoded pilot, receive the state information of the scheduled non-precoded pilot from the base station.