Method and apparatus for buffer state report
Embodiments of the present disclosure provide methods and apparatus for buffer state report. A method performed at a terminal device may comprise: predicting a buffer size associated with data to be transmitted; and transmitting a buffer state report, BSR, including the predicted buffer size to a network node. A method performed at a network node may comprise: receiving a buffer state report, BSR, including a predicted buffer size associated with data to be received from a terminal device; and transmitting a grant for the data according to the received BSR. The latency of data transmission from the terminal device to the network node may be reduced.
1 . A method performed at a terminal device, comprising:
predicting a buffer size associated with data to be transmitted;
predicting a probability associated with the predicted buffer size;
transmitting a buffer state report, BSR, including the predicted buffer size to a network node;
receiving a grant for the data to be transmitted; and
transmitting the data.
2 . The method according to claim 1 , wherein the predicting is based on at least one of: a size, a type, a content, or a required transmission rate of the data;
input data from an application behaviour, a user behaviour, a radio condition, or a traffic behaviour.
3 . The method according to claim 1 , wherein the BSR includes the probability.
4 . The method according to claim 3 , wherein the terminal device transmits the BSR, when the probability is equal to or greater than a threshold.
5 . The method according to claim 1 , wherein the predicting is made by an artificial intelligence algorithm.
6 . The method according to claim 1 , further comprising:
receiving a BSR prediction configuration for the terminal device, or for a plurality of terminal devices.
7 . The method according to claim 1 , wherein the BSR is configured for a logic channel, or for a logic channel group; and
wherein the BSR is configured based on a priority of the logic channel or the logical channel group.
8 . The method according to claim 1 ,
wherein the BSR further comprises a buffer size associated with data assigned to a logic channel.
9 . The method according to claim 1 , further comprising:
reporting a capability of the terminal device for supporting the BSR.
10 . The method according to claim 1 , wherein the BSR further comprises: a predicted time point or time window for transmitting the data.
11 . The method according to claim 10 , wherein the BSR further comprises: a probability of the predicted time point or time window for transmitting the data.
12 . The method according to claim 1 , wherein the predicted buffer size is included in a medium access control, MAC, control element, CE.
13 . The method according to claim 1 , further comprising:
receiving an indication for whether the BSR including the predicted buffer size is enabled or disabled.
14 . The method according to claim 13 , further comprising:
transmitting a buffer state report, BSR, including a buffer size associated with data assigned to a logical channel of the terminal device, when the BSR including the predicted buffer size is disabled.
15 . The method according to claim 13 ,
wherein the indication comprises a threshold for a probability of the predicted buffer size.
16 . The method according to claim 1 , further comprising:
starting a timer after transmitting the BSR including the predicted buffer size; or
stopping the timer after receiving the grant.
17 . The method according to claim 16 , further comprising:
restarting the timer, if the predicted buffer size is updated and the BSR including the predicted buffer size is retransmitted
or
retransmitting the predicted BSR, when the timer expires.
18 . A terminal device, comprising:
a processor; and
a memory, the memory containing instructions executable by the processor, whereby the terminal device is operative to:
predict a buffer size associated with data to be transmitted;
predict a probability associated with the predicted buffer size;
transmit a buffer state report, BSR, including the predicted buffer size to a network node;
receive a grant for the data to be transmitted; and
transmit the data.
19 . A network node, comprising:
a processor; and
a memory, the memory containing instructions executable by the processor, whereby the network node is operative to:
receive a buffer state report, BSR, including a predicted buffer size associated with data to be received from a terminal device; wherein the BSR further includes a probability associated with the predicted buffer size predicted by the terminal device;
transmit a grant for the data according to the received BSR.