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

Patent metadata

Field	Value
Publication number	US-2018145807-A1
Application number	US-201615571518-A
Country	US
Kind code	A1
Filing date	Aug 8, 2016
Priority date	Aug 13, 2015
Publication date	May 24, 2018
Grant date	—

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.

First claim

1 . An information transmission method used in a base station, the method comprising:
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.

2 . An information processing method used in a mobile station, the method comprising:
receiving mode indication information regarding reference signals to be transmitted from a base station; receiving the reference signals from the base station based on the mode indication information; and obtaining channel state information between the mobile station and the base station based on the received reference signals.

3 . A base station comprising:
a signal generator configured to generate mode indication information regarding reference signals to be transmitted and generate the reference signals to be transmitted based on the mode indication information; and a transmitter configured to transmit the mode indication information and transmit the reference signals.

4 . A mobile station comprising:
a receiver configured to receive mode indication information regarding reference signals to be transmitted from a base station and receive the reference signals from the base station based on the mode indication information; and a processor configured to obtain channel state information between the mobile station and the base station based on the received reference signals.

5 . The mobile station according to claim 4 ,
wherein the receiver receives at least one of dimension number information of the reference signals and transmission scheme information of the reference signals as the mode indication information from the base station.

6 . The mobile station according to claim 5 ,
wherein the transmission scheme information is used to indicate whether the reference signals are BF CSI-RSs or NP CSI-RSs, wherein when the mode indication information includes the transmission scheme information, 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.

7 . The mobile station according to claim 4 ,
wherein the receiver receives 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.

8 . The mobile station according to claim 4 , further comprising:
a transmitter configured to transmit feedback information indicating at least one reference signal selected from the received reference signals to the base station.

9 . The mobile station according to claim 8 ,
wherein the processor obtains the channel state information between the mobile station and the base station based on the selected at least one reference signal, and wherein the transmitter transmits the channel state information to the base station.

10 . The mobile station according to claim 5 ,
wherein the receiver receives 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.

11 . The mobile station according to claim 6 ,
wherein the receiver receives 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.

12 . The mobile station according to claim 5 , further comprising:
a transmitter configured to transmit feedback information indicating at least one reference signal selected from the received reference signals to the base station.

13 . 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 received reference signals to the base station.

14 . The mobile station according to claim 7 , further comprising:
a transmitter configured to transmit feedback information indicating at least one reference signal selected from the received reference signals to the base station.

Assignees

• Ntt Docomo Inc

Inventors

• Nagata Satoshi
• Kakishima Yuichi
• Luan Xi
• Na Chongning
• Hou Xiaolin
• Jiang Huiling

Classifications

• H04W72/23

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

• H04B7/0626

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04W76/27

  Transitions between radio resource control [RRC] states · CPC title

• H04W88/08

  Access point devices · CPC title

• H04B7/0617

  for beam forming · CPC title