Channel state information feedback for full duplex cellular communications

• US 9,838,193 B2
• Filed: 08/18/2015
• Issued: 12/05/2017
• Est. Priority Date: 08/18/2015
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Kazmi, Muhammad, Fodor, Gabor, Hui, Dennis
• Primary Examiner(s): Thompson, Jr., Otis L
• Application Number:
  US14/829,073
• Publication Number:
  US 20170054544A1
• Time in Patent Office: 840 Days
• Field of Search: None
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method is performed at a user device, UE (12), for supporting a transmission mode configuration with respect to a communication channel between the UE (12) and an network node (14) of a radio network. The method comprises determining an impact of self-interference at a receiver of the UE (12) due to an uplink transmission to the network node (14) in case of full duplex communication, generating a channel state information comprising an information of said impact of self-interference, and transmitting the channel state information to the network node (14) to support said node in taking a decision between half duplex and full duplex communication configuration for the communication channel. A corresponding method is performed at a network node (14). Embodiments herein further include a UE (12), a network node (14) and computer programs thereto.

Claims

1. A method performed at a user device, UE, for supporting a transmission mode configuration with respect to a communication channel between the UE and an network node of a radio network, comprising:

determining an impact of self-interference at a receiver of the UE due to an uplink transmission to the network node in case of full duplex communication,

generating a channel state information comprising at least an information of said impact of self-interference, wherein the UE generates the channel state information to be indicative of a ratio of a downlink signal-to-self-interference, SSIR, at the receiver of the UE, and

transmitting the channel state information to the network node,

wherein the UE generates the channel state information comprising a signal to interference plus noise ratio, SINR, value associated to full duplex communication and an SINR value associated to half duplex communication, to enable network the node to determine the SSIR based on the received channel state information.

2. The method of claim 1, wherein the channel state information further comprises information indicative half duplex and/or full duplex communication capabilities for the communication channel.

3. The method of claim 1, wherein the channel state information is indicative of a first achievable overall bit rate associated to using half duplex communication and a second achievable overall bit rate associated to using full duplex communication.

4. The method of claim 1, wherein the UE performs channel state information reporting comprising information associated both to full duplex communication and to half duplex communication, if one or a plurality of the following conditions are met:

an amount of battery of the UE is above a defined threshold,

a requested data rate is above a defined data rate threshold,

a cell load is below a defined load threshold, and

a UE buffer is filled with UE transmission data above a defined buffer fill threshold.

5. A user equipment UE adapted for communicating on a communication channel between the UE and a network node of a radio network, comprising:

a capability evaluation module adapted to determining an impact of self-interference at a receiver of the UE due to an uplink transmission to the network node in case of full duplex communication on the communication channel,

a scheduling reception module adapted to receive a scheduling decision indicative of whether the UE shall perform half duplex or full duplex communication, and

a channel state processing and reporting module adapted to reporting channel state information comprising an information about the impact of self-interference,

wherein the channel state processing and reporting module is further adapted to generate the channel state information being indicative of a ratio of a downlink signal-to-self-interference, SSIR at the receiver of the UE,

wherein the channel state processing and reporting module is adapted to generate the channel state information being indicative of SINR values associated to full duplex and to half duplex communication, so that the network node is enabled to determine the SSIR based on the received SINR values.

6. The UE of claim 5, further comprising

a channel state information configuration reception module adapted to receive a channel state information reporting mode configuration message, and

the channel state processing and reporting module further being adapted to reporting the channel state information according to the channel state information reporting mode configuration message.

7. The UE of claim 6, wherein the channel state processing and reporting module is further adapted to generate channel state information being indicative of a first achievable overall bit rate associated to using half duplex communication and a second achievable overall bit rate associated to using full duplex communication.

8. A method performed at a user device, UE, for supporting a transmission mode configuration with respect to a communication channel between the UE and an network node of a radio network, comprising:

determining an impact of self-interference at a receiver of the UE due to an uplink transmission to the network node in case of full duplex communication,

generating a channel state information comprising at least an information of said impact of self-interference, wherein the UE generates the channel state information to be indicative of a ratio of a downlink signal-to-self-interference, SSIR, at the receiver of the UE, and

transmitting the channel state information to the network node,

wherein the UE determines the SSIR based on a first signal to interference plus noise ratio, SINR, associated to full duplex communication mode and a second SINR associated to half duplex communication mode.

9. The method of claim 8, wherein the channel state information further comprises information indicative half duplex and/or full duplex communication capabilities for the communication channel.

10. The method of claim 8, wherein the channel state information is indicative of a first achievable overall bit rate associated to using half duplex communication and a second achievable overall bit rate associated to using full duplex communication.

11. The method of claim 8, wherein the UE performs channel state information reporting comprising information associated both to full duplex communication and to half duplex communication, if one or a plurality of the following conditions are met:

an amount of battery of the UE is above a defined threshold,

a requested data rate is above a defined data rate threshold,

a cell load is below a defined load threshold, and

a UE buffer is filled with UE transmission data above a defined buffer fill threshold.

12. A method performed at a user device, UE, for supporting a transmission mode configuration with respect to a communication channel between the UE and an network node of a radio network, comprising:

determining an impact of self-interference at a receiver of the UE due to an uplink transmission to the network node in case of full duplex communication,

generating a channel state information comprising at least an information of said impact of self-interference, wherein the UE generates the channel state information to be indicative of a ratio of a downlink signal-to-self-interference, SSIR, at the receiver of the UE, and

transmitting the channel state information to the network node,

wherein the UE determines the SSIR based on each a value indicative of a lower limit and an upper limit respectively of a first signal to interference plus noise ratio, SINR, associated to full duplex communication mode, and on each a value indicative of a lower limit and an upper limit respectively of a second SINR associated to half duplex communication mode.

13. A method performed at a user device, UE, for supporting a transmission mode configuration with respect to a communication channel between the UE and an network node of a radio network, comprising:

determining an impact of self-interference at a receiver of the UE due to an uplink transmission to the network node in case of full duplex communication,

generating a channel state information comprising at least an information of said impact of self-interference, and

transmitting the channel state information to the network node,

wherein the UE performs the following steps;

sending a communication mode capabilities message that is indicative of full duplex communication capabilities at the UE,

receiving a CSI reporting mode communication message indicative of whether the UE shall be configured to perform a full duplex communication or not,

in case that the UE is being configured for full duplex communication, determining a SSIR value or values to determine the SSIR, and

providing a channel state report indicative of the SSIR.

14. A user equipment UE adapted for communicating on a communication channel between the UE and a network node of a radio network, comprising:

a capability evaluation module adapted to determining an impact of self-interference at a receiver of the UE due to an uplink transmission to the network node in case of full duplex communication on the communication channel,

a scheduling reception module adapted to receive a scheduling decision indicative of whether the UE shall perform half duplex or full duplex communication, and

a channel state processing and reporting module adapted to reporting channel state information comprising an information about the impact of self-interference,

wherein the channel state processing and reporting module is further adapted to generate the channel state information being indicative of a ratio of a downlink signal-to-self-interference, SSIR at the receiver of the UE,

wherein the channel state processing and reporting module is further adapted to determine the SSIR based on a first signal to interference plus noise ratio, SINR, associated to full duplex communication mode and a second SINR associated to half duplex communication mode.

15. The UE of claim 14, further comprising

a channel state information configuration reception module adapted to receive a channel state information reporting mode configuration message, and

the channel state processing and reporting module further being adapted to reporting the channel state information according to the channel state information reporting mode configuration message.

16. The UE of claim 14, wherein the channel state processing and reporting module is further adapted to generate channel state information being indicative of a first achievable overall bit rate associated to using half duplex communication and a second achievable overall bit rate associated to using full duplex communication.

17. A user equipment UE adapted for communicating on a communication channel between the UE and a network node of a radio network, comprising:

a capability evaluation module adapted to determining an impact of self-interference at a receiver of the UE due to an uplink transmission to the network node in case of full duplex communication on the communication channel,

a scheduling reception module adapted to receive a scheduling decision indicative of whether the UE shall perform half duplex or full duplex communication, and

a channel state processing and reporting module adapted to reporting channel state information comprising an information about the impact of self-interference,

wherein the channel state processing and reporting module is further adapted to generate the channel state information being indicative of a ratio of a downlink signal-to-self-interference, SSIR at the receiver of the UE,

wherein the channel state processing and reporting module is further adapted to determining the SSIR based on each a value indicative of a lower limit and an upper limit respectively of a first signal to interference plus noise ratio, SINR, associated to full duplex communication mode, and on each a value indicative of a lower limit and an upper limit respectively of a second SINR associated to half duplex communication mode.