Handling scheduling request failure in a network

Patent metadata

Field	Value
Publication number	US-12016011-B2
Application number	US-202217576760-A
Country	US
Kind code	B2
Filing date	Jan 14, 2022
Priority date	Jan 15, 2021
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

In an example embodiment, a method of reducing SR max retransmissions in a communication network is disclosed. The method includes: accessing an SR max retransmission UE pool stored in a storage of the base station, the SR max retransmission UE pool being a list of plurality of UEs which experienced SR max retransmission. The method further includes identifying at least one UE in the SR max retransmission pool that would enter an SR max retransmission state, based on a last PUSCH uplink time period and a SR max retransmission time period associated with the at least one UE. Further, the method includes allocating a dummy UL grant to the identified at least one UE.

First claim

What is claimed is:

1. A method of a base station, for handling Scheduling Request (SR) failure in a network, the method comprising:
accessing a SR max retransmission user equipment (UE) pool maintained in a storage of the base station, wherein the SR max retransmission UE pool includes a list of plurality of UEs, which experienced SR max retransmission;
identifying at least one UE in the SR max retransmission UE pool which would enter an SR max retransmission state based on a last Physical Uplink Shared Channel (PUSCH) uplink time period and a SR max retransmission time period associated with the at least one UE, wherein the last PUSCH uplink time period is a time period elapsed since last PUSCH packet from UE was received, and wherein the SR max retransmission time period is a time period after which the UE would enter the SR max retransmission state; and
allocating a dummy uplink (UL) grant to the identified at least one UE.

2. The method of claim 1 , wherein the identifying further comprises:
determining whether the last PUSCH uplink time period has crossed a threshold time period, wherein the threshold time period is less than the SR max retransmission time period;
identifying that the UE would enter the SR max retransmission state, based on the last PUSCH uplink time period being determined to have crossed the threshold time period; and
identifying that the UE would not enter the SR max retransmission state, based on the last PUSCH uplink time period being determined to not have crossed the threshold time period.

3. A base station, comprising:
a communication unit comprising communication circuitry configured to receive a scheduling request (SR) from a user equipment (UE) seeking an uplink (UL) grant;
a storage unit comprising a memory storing a Scheduling Request (SR) max retransmission UE pool, wherein the SR max retransmission UE pool comprises a list of plurality of UEs, which experienced SR max retransmission; and
a controller coupled to the communication unit and the storage unit, wherein the controller is configured to:
access the SR max retransmission UE pool;
identify at least one UE in the SR max retransmission UE pool which would enter an SR max retransmission state, based on a last PUSCH uplink time period and a SR max retransmission time period associated with the at least one UE, wherein the last PUSCH uplink time period is a time period elapsed since last PUSCH packet from UE was received, and wherein the SR max retransmission time period is a time period after which the UE would enter the SR max retransmission state; and
allocate a dummy UL grant to the identified at least one UE.

4. The base station of claim 3 , wherein, to predict whether the UE would enter an SR max retransmission state, the controller is further configured to:
determine whether the last PUSCH uplink time period has crossed a threshold time period of the SR max retransmission time period;
identify that the UE would enter the SR max retransmission state, based on the last PUSCH uplink time period being determined to have crossed the threshold time period of the SR max retransmission time period; and
identify that the UE would not enter the SR max retransmission state, based on the last PUSCH uplink time period being determined to not have crossed the threshold time period of the SR max retransmission time period.

5. A method, of operating a base station, for handling Scheduling Request (SR) failure in a network, the method comprising:
receiving, at the base station, a SR Max retransmission triggered Physical Random Access Channel (PRACH) from a user equipment (UE);
determining whether the UE is an SR max retransmission triggered UE, wherein the SR max retransmission triggered UE is a UE which has previously entered the SR max retransmission state; and
identifying one or more Resource Blocks (RBs) allocated for Physical uplink control channel (PUCCH) to the UE having corresponding uplink control information (UCI) decoding success indicator greater than a threshold indicator, in response to determining that the UE is an SR max retransmission triggered UE; and
allocating the identified one or more RBs to the UE for transmitting one or more subsequent SR.

6. The method of claim 5 , further comprises:
maintaining the UCI decoding success indicator corresponding to each of a plurality of RBs associated with the UE in a storage space coupled to the base station.

7. The method of claim 6 , wherein the UE is configured to communicate using frequency range 1 (FR1), wherein maintaining the UCI decoding success indicator for each of the plurality of RBs, comprises:
recording a plurality of UCI decoding reports corresponding to the RB, wherein each of the plurality of UCI decoding reports comprises data related to decoding of a plurality of SRs received from one or more UEs over the RB;
selecting a set of UCI decoding reports from the plurality of UCI decoding reports corresponding to the RB; and
determining the UCI decoding success indicator for the RB based on the selected set of UCI decoding reports.

8. The method of claim 6 , wherein the UE is configured to communicate using frequency range 2 (FR2), wherein maintaining the UCI decoding success indicator for each of the plurality of RBs, comprises:
recording a plurality of UCI decoding reports corresponding to the RB, wherein each of the plurality of UCI decoding reports comprises data related to decoding of a plurality of SRs received from one or more UEs over the RB and corresponding beams and distances associated with each of the plurality of SRs;
selecting a set of UCI decoding reports from the plurality of UCI decoding reports corresponding to the RB; and
determining the UCI decoding success indicator for the RB based on the selected predefined number of UCI decoding reports.

9. The method of claim 6 , wherein the UE is configured to communicate using one of a frequency range 1 (FR1) and a frequency range 2 (FR2), wherein maintaining the UCI decoding success indicator comprises:
configuring the UE to perform sub-band reporting for the plurality of RBs, the sub-band reporting comprising transmission of a Channel Quality Indicator (CQI) report corresponding to each of the plurality of RBs; and
receiving the CQI report corresponding to each of the plurality of RBs from the UE; and
determining the UCI decoding success indicator for each of the plurality of RBs based on the corresponding CQI.

10. A base station ( 110 ), comprising:
a communication unit comprising communication circuitry configured to receive a scheduling request (SR) for uplink (UL) grant from a UE;
a storage unit comprising a memory; and
a controller coupled to the communication unit and the storage unit, wherein the controller is configured to:
determine whether the UE is a SR max retransmission triggered UE, wherein the SR max retransmission triggered UE is a UE which has previously entered the SR max retransmission state; and
identify one or more Resource Blocks (RBs) allocated for Physical uplink control channel (PUCCH) to the UE having corresponding uplink control information (UCI) decoding success indicator greater than a threshold indicator, in response to determining that the UE is an SR max retransmission triggered UE; and
allocate the identified one or more RBs to the UE for transmitting one or more subsequent SR.

11. The base station of claim 10 , wherein the controller is further configured to:
maintain the UCI decoding success indicator corresponding to each of a plurality of RBs associated with the UE in a storage space coupled to the base station.

12. The base station of claim 11 , wherein the UE is configured to c

Assignees

• Samsung Electronics Co Ltd

Inventors

• Job Allen
• Shukla Akhil
• Kumar Vikash
• Kumar Animesh
• Singh Gaurav
• Lakshmanan Palani
• Kumar Dheeraj
• Godavarti Satya Venkata Uma Kishore

Classifications

• H04W72/23

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

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/02

  Selection of wireless resources by user or terminal · CPC title

• H04L1/08

  by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} · CPC title

• H04L1/1864

  ARQ related signaling (H04L1/1607 takes precedence) · CPC title