Information transmission method, information processing method, base station, and mobile station

• US 10,341,073 B2
• Filed: 08/08/2016
• Issued: 07/02/2019
• Est. Priority Date: 08/13/2015
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Nagata, Satoshi, Kakishima, Yuichi, Luan, Xi, Na, Chongning, Hou, Xiaolin, Jiang, Huiling
• Primary Examiner(s): Nguyen, Brian D
• Application Number:
  US15/571,518
• Publication Number:
  US 20180145807A1
• Time in Patent Office: 1,058 Days
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0695 using beam selection
• CPC Class Codes: H04B 7/088 using beam selection
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

An information transmission method used in a base station includes: determining mode indication information regarding reference signals to be transmitted; transmitting the mode indication information to a mobile station; and transmitting the reference signals to the mobile station based on the mode indication information.

Claims

1. An information processing method used in a mobile station, the method comprising:

receiving reference signals from a base station based on mode indication information including transmission scheme information regarding the reference signals; and

obtaining channel state information based on the reference signals,

wherein the transmission scheme information is used to indicate whether the reference signals are BF CSI-RSs or NP CSI-RSs, and

wherein the channel state information is obtained by

determining whether the reference signals are the BF CSI-RSs or the NP CSI-RSs based on the transmission scheme information,

performing a first process on the reference signals and obtaining the channel state information when the reference signals are the BF CSI-RSs, and

performing a second process on the reference signals and obtaining the channel state information when the reference signals are the NP CSI-RSs,

wherein the second process is different from the first process.

2. A mobile station comprising:

a receiver configured to receive reference signals from a base station based on mode indication information including transmission scheme information regarding the reference signals; and

a processor configured to obtain channel state information based on the reference signals,

wherein the transmission scheme information is used to indicate whether the reference signals are BF CSI-RSs or NP CSI-RSs, and

wherein the processor is configured to

determine whether the reference signals are the BF CSI-RSs or the NP CSI-RSs based on the transmission scheme information,

perform a first process on the reference signals and obtain the channel state information when the reference signals are the BF CSI-RSs, and

perform a second process on the reference signals and obtain the channel state information when the reference signals are the NP CSI-RSs, and

wherein the second process is different from the first process.

3. The mobile station according to claim 2,

wherein the receiver is configured to further receive dimension number information of the reference signals as the mode indication information from the base station.

4. The mobile station according to claim 3,

wherein the receiver is configured to receive a configuration information list related to the reference signals from the base station by radio resource control signaling, and the configuration information list includes one or more configuration information blocks each having an identification number.

5. The mobile station according to claim 3, further comprising:

a transmitter configured to transmit feedback information indicating at least one reference signal selected from the reference signals to the base station.

6. The mobile station according to claim 2,

wherein the receiver is configured to receive a configuration information list related to the reference signals from the base station by radio resource control signaling, and the configuration information list includes one or more configuration information blocks each having an identification number.

7. The mobile station according to claim 6, further comprising:

a transmitter configured to transmit feedback information indicating at least one reference signal selected from the reference signals to the base station.

8. The mobile station according to claim 2, further comprising:

a transmitter configured to transmit feedback information indicating at least one reference signal selected from the reference signals to the base station.

9. The mobile station according to claim 8,

wherein the processor is configured to obtain the channel state information based on the selected at least one reference signal, and

wherein the transmitter is configured to transmit the channel state information to the base station.