Buffer status report transmission and device

• US 11,071,129 B2
• Filed: 01/18/2018
• Issued: 07/20/2021
• Est. Priority Date: 12/08/2017
• Status: Active Grant

• Current Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Original Assignee: Beijing Xiaomi Mobile Software Co., Ltd. (Xiaomi Corp.)
• Inventors: Jiang, Xiaowei
• Primary Examiner(s): Pham, Brenda H
• Application Number:
  US16/472,744
• Publication Number:
  US 20210136793A1
• Time in Patent Office: 1,279 Days
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/535 based on resource usage policies
• CPC Class Codes: H04W 80/02 Data link layer protocols

Abstract

The disclosure relates to a buffer status report transmission method and device. The method includes receiving a configuration message sent by a base station; determining uplink resource allocation indication information sent by the base station and an uplink transmission time interval corresponding to the uplink resource allocation indication information based on the configuration message; determining an estimated duration based on the time interval; determining a buffer status report trigger time, and a time of a physical downlink control channel that precedes the buffer status report trigger time; determining whether there is an uplink shared channel resource available in an uplink transmission opportunity, the uplink transmission opportunity being within a time range of the estimated duration from the buffer status report trigger time or from the time of the physical downlink control channel; and sending a buffer status report to the base station when there is an uplink shared channel resource available in the uplink transmission opportunity.

Claims

1. A method of transmitting a buffer status report, the method being applicable to a user device, and the method comprising:

receiving a configuration message sent by a base station;

determining uplink resource allocation indication information sent by the base station and an uplink transmission time interval corresponding to the uplink resource allocation indication information based on the configuration message;

determining an estimated duration based on the time interval;

determining a buffer status report trigger time, and a time of a physical downlink control channel that precedes the buffer status report trigger time;

determining whether there is an uplink shared channel resource available in an uplink transmission opportunity, the uplink transmission opportunity being within a time range of the estimated duration from the buffer status report trigger time or from the time of the physical downlink control channel; and

sending a buffer status report to the base station when there is an uplink shared channel resource available in the uplink transmission opportunity.

2. The method of claim 1, further comprising:

determining a maximum transmission duration of an uplink shared channel based on the configuration message,

wherein determining the estimated duration based on the time interval comprises;

obtaining a correlation table between shared channel transmission durations and the time intervals from the configuration message;

determining a maximum time interval in the time intervals corresponding to the shared channel transmission durations which are less than the maximum transmission duration of the uplink shared channel in the correlation table, as the estimated duration;

or

determining the time interval corresponding to the maximum transmission duration of the uplink shared channel in the correlation table as the estimated duration.

3. The method of claim 2, wherein, determining the maximum transmission duration of the uplink shared channel based on the configuration message comprises:

determining whether the buffer status report is triggered periodically, or whether the buffer status report is triggered by a buffer status report retransmission timer timeout;

determining a logical channel with a highest priority from logical channels where data to be transmitted exists, when the buffer status report is triggered periodically or triggered by the buffer status report retransmission timer timeout; and

determining the maximum transmission duration of the uplink shared channel based on a logical channel prioritization LCP restricted parameter of the logical channel with the highest priority in the configuration message.

4. The method of claim 3, wherein, determining the maximum transmission duration of the uplink shared channel based on the configuration message comprises:

determining the maximum transmission duration of the uplink shared channel based on the LCP parameter of the logical channel that triggers the buffer status report in the configuration message when the buffer status report is not triggered periodically or triggered by the buffer status report retransmission timer timeout; and

obtaining a maximum shared channel transmission duration from the correlation table as the maximum transmission duration of the uplink shared channel, when the maximum transmission duration of the uplink shared channel does not exist in the LCP restricted parameter of the logical channel that triggers the buffer status report, or when the logical channel that triggers the buffer status report is not determined.

5. The method of claim 3, wherein determining the logical channel with the highest priority from the logical channels where data to be transmitted exists comprises:

determining the logical channel with the highest priority from the logical channels where data to be transmitted exists and that are configured with the restricted parameter of the shared channel transmission duration.

6. The method of claim 1, wherein determining the estimated duration based on the time interval comprises:

determining a maximum time interval in the correlation table between the shared channel transmission durations and the time intervals in a logical channel prioritization LCP restricted parameter of the logical channel in the configuration message as the estimated duration.

7. The method of claim 1, wherein determining the estimated duration based on the time interval comprises:

obtaining a correlation table between shared channel transmission durations and the time intervals from the configuration message; and

determining a minimum time interval in the correlation table as the estimated duration.

8. The method of claim 1, wherein determining the estimated duration based on the time interval comprises:

obtaining a correlation table between shared channel transmission durations and the time intervals from the configuration message; and

performing calculation for each time interval in the correlation table based on a preset algorithm, and using the calculation result as the estimated duration.

9. The method of claim 1, further comprising:

before determining the estimated duration based on the time interval, when the configuration information includes a configured duration corresponding to a logical channel required for sending the buffer status report, wherein the configured duration is equal to a specified time interval in a correlation table between the shared channel transmission durations and the time intervals; and

using the configured duration as the estimated duration.

10. The method of claim 1, further comprising:

before determining whether there is an uplink shared channel resource available in the uplink transmission opportunity;

determining a preset interval corresponding to a carrier transmitting the buffer status report, wherein, the preset interval is processing time required by the user device, from an end time of the physical downlink control channel through which the user device receives the uplink resource allocation indication information, until a start time of latest possible physical downlink shared channel transmission; and

determining whether there is an uplink shared channel resource available in an uplink transmission opportunity, the uplink transmission opportunity being within a time range of the estimated duration from the buffer status report trigger time or from the time of the physical downlink control channel,

wherein determining whether there is the uplink shared channel resource available in the uplink transmission opportunity further includes;

determining whether a time duration from the available uplink shared channel resource to the buffer status report trigger time is greater than the preset interval, and

determining that there is an uplink shared channel resource available in the uplink transmission opportunity when the time duration is greater than the preset interval.

11. The method of claim 1, wherein, when there is an uplink shared channel resource available in the uplink transmission opportunity, sending the buffer status report to the base station by using the available uplink shared channel resource comprises:

when there is an uplink shared channel resource available in the uplink transmission opportunity;

determining whether the available uplink shared channel resource is capable of carrying a buffer status report; and

sending the buffer status report to the base station by the available uplink shared channel resource when the available uplink shared channel resource is capable of carrying the buffer status report.

12. The method of claim 1, further comprising:

when there is no uplink shared channel resource available in the uplink transmission opportunity, or when there is an uplink shared channel resource available in the uplink transmission opportunity and the available uplink shared channel resource is not applicable to transmitting data of the logical channel that triggers the buffer status report;

determining to trigger a scheduling request, and determining whether to send the scheduling request, wherein, a time of determining to trigger the scheduling request is a scheduling request trigger time;

when the scheduling request is sent;

requesting for the uplink shared channel resource by the scheduling request being sent; and

sending the buffer status report to the base station by the requested uplink shared channel resource;

when the scheduling request is not sent;

requesting for the uplink shared channel resource by a random access request to the base station; and

sending the buffer status report to the base station by the requested uplink shared channel resource.

13. The method of claim 12, wherein determining whether to send the scheduling request comprises:

determining whether there is an uplink shared channel resource available in an uplink transmission opportunity within a time range of the estimated duration from the trigger time of the scheduling request and from the time of each physical downlink control channel after the trigger time of the scheduling request;

for an uplink transmission opportunity that does not have an available uplink shared channel resource, determining whether a medium access control entity is configured with an available physical uplink control channel resource within an estimated duration corresponding to the uplink transmission opportunity; and

when the medium access control entity is configured with the available physical uplink control channel resource within the estimated duration corresponding to the uplink transmission opportunity, determining to send a scheduling request, otherwise, determining not to send the scheduling request.

14. The method of claim 12 wherein, determining whether to send the scheduling request comprises:

determining whether there is an uplink shared channel resource available in the uplink transmission opportunity within a time range of the estimated duration from the time of the latest physical downlink control channel before the trigger time of the scheduling request, and from the time of each physical downlink control channel after the trigger time of the scheduling request;

for an uplink transmission opportunity that does not have an available uplink shared channel resource;

determining whether a medium access control entity is configured with an available physical uplink control channel resource within an estimated duration corresponding to the uplink transmission opportunity; and

when the medium access control entity is configured with the available physical uplink control channel resource within the estimated duration corresponding to the uplink transmission opportunity, determining to send a scheduling request, otherwise, determining not to send the scheduling request.

15. An electronic device, comprising:

a processor;

a memory for storing instructions executable by the processor;

wherein the processor is configured to;

receive a configuration message sent by a base station;

determine uplink resource allocation indication information sent by the base station and an uplink transmission time interval corresponding to the uplink resource allocation indication information based on the configuration message;

determine an estimated duration based on the time interval;

determine a buffer status report trigger time, and a time of a physical downlink control channel that precedes the buffer status report trigger time;

determine whether there is an uplink shared channel resource available in an uplink transmission opportunity, the uplink transmission opportunity being within a time range of the estimated duration from the buffer status report trigger time or from the time of the physical downlink control channel; and

when there is an uplink shared channel resource available in the uplink transmission opportunity,

send a buffer status report to the base station by the available uplink shared channel resource.

16. The device of claim 15, wherein, the processor is further configured to:

determine a maximum transmission duration of an uplink shared channel based on the configuration message,

wherein, when determining the estimated duration based on the time interval, the processor is further configured to;

obtain a correlation table between shared channel transmission durations and the time intervals from the configuration message;

determine a maximum time interval in the time intervals corresponding to the shared channel transmission durations which are less than the maximum transmission duration of the uplink shared channel in the correlation table, as the estimated duration;

or

determine the time interval corresponding to the maximum transmission duration of the uplink shared channel in the correlation table as the estimated duration.

17. The device of claim 16, wherein, when determining the maximum transmission duration of the uplink shared channel based on the configuration message, the processor is further configured to:

determine whether the buffer status report is triggered periodically, or whether the buffer status report is triggered by a buffer status report retransmission timer timeout;

determine a logical channel with a highest priority from logical channels where data to be transmitted exists, when the buffer status report is triggered periodically or triggered by the buffer status report retransmission timer timeout; and

determine the maximum transmission duration of the uplink shared channel based on a logical channel prioritization LCP restricted parameter of the logical channel with the highest priority in the configuration message.

18. The device of claim 17, wherein, when determining the maximum transmission duration of the uplink shared channel based on the configuration message, the processor is further configured to:

determine the maximum transmission duration of the uplink shared channel based on the LCP parameter of the logical channel in the configuration message when the buffer status report is not triggered periodically or triggered by the buffer status report retransmission timer timeout; and

obtain a maximum shared channel transmission duration from the correlation table as the maximum transmission duration of the uplink shared channel, when the maximum transmission duration of the uplink shared channel does not exist in the LCP restricted parameter of the logical channel that triggers the buffer status report, or when the logical channel that triggers the buffer status report is not determined.

19. The device of claim 17, wherein, when determining the logical channel with the highest priority from the logical channels where data to be transmitted exists, the processor is further configured to:

determine the logical channel with the highest priority from the logical channels where data to be transmitted exists and that are configured with the restricted parameter of the shared channel transmission duration.

20. The device of claim 15, wherein, when determining the estimated duration based on the time interval, the processor is further configured to:

determine a maximum time interval in a correlation table between the shared channel transmission durations and the time intervals in a logical channel prioritization LCP restricted parameter of the logical channel in the configuration message as the estimated duration.