Methods to reduce number of blind decoding attempts done by a user equipment

Patent metadata

Field	Value
Publication number	US-11785612-B2
Application number	US-202117450892-A
Country	US
Kind code	B2
Filing date	Oct 14, 2021
Priority date	Oct 14, 2020
Publication date	Oct 10, 2023
Grant date	Oct 10, 2023

Abstract

The present invention relates to a method of reducing blind decoding attempts by a User Equipment (UE) in a telecommunication network. The method comprises configuring a Search Space (SS) configuration to the UE. A Base Station (BS) signals one of a subset of Aggregation Levels (ALs) to be monitored based on channel quality of the UE and an associated time period, and a value of multiplication factor (k) and an associated time period. The UE iteratively monitors a Physical Downlink Control Channel (PDCCH) on the ALs signalled by the BS till the UE stops receiving a new configuration. The UE performs one of adopting an original configuration, requesting the BS for a new configuration, utilizing a default configuration or utilizing an original configuration.

First claim

We claim:

1. A method of controlling blind decoding attempts by a User Equipment (UE) in a telecommunication network, the method comprising:
configuring, by a Base Station (BS), at least one of a Search Space (SS) configuration and a value of number of Downlink Control Information (DCIs) the UE to monitor for at least one format, within a predefined time period;
signaling, by the BS, the configuration to the UE;
receiving, by the UE, the configuration signalled by the BS;
monitoring, by the UE, for the DCI in all SS sets;
counting, by the UE, number of DCIs received for each of the at least one formats;
determining, by the UE, if the number of DCIs for each of the at least one format exceeds a predefined number of DCIs the UE is allowed to monitor;
stopping, by the UE, monitoring of Physical Downlink Control Channel (PDCCH) candidates associated with one or more DCI formats identified to exceed the predefined number of DCIs the UE is allowed to receive; and
removing, by the UE, PDCCH candidates corresponding to the exceeded DCI formats in remaining slots present within the predefined time period.

2. The method as claimed in claim 1 , wherein when the UE receives new configurations, resets count of the number of DCIs to zero, and performs the monitoring for DCI based on the new configuration.

3. The method as claimed in claim 1 , further comprising determining if a timer associated with receipt of the DCIs has expired, wherein when the timer expires, count values of the DCIs corresponding to the formats are reset to zero and the UE performs the monitoring for DCI.

4. The method as claimed in claim 1 , wherein the signalling is performed using one or more of Radio Resource Control (RRC) signalling, Medium Access Control-Control Element (MAC-CE) signalling, and L1 signalling.

5. A method of controlling blind decoding attempts by a User Equipment (UE) in a telecommunication network, the method comprising:
configuring, by a Base Station (BS), a Search Space (SS) configuration to the UE;
receiving, by the UE, a Downlink Control Information (DCI) in a Search Space (SS) by a Base Station (BS);
determining, by the UE, if all Physical Downlink Control Channel (PDCCH) candidates of all SS are monitored when the indicator bit in the Downlink Control Information (DCI) received in SS with identity i is determined to be set and removing PDCCH candidates corresponding to SS with identity greater than i from PDCCH candidates for blind decoding when the indicator bit in the DCI received in SS with identity i is determined not to be set; and
resuming the blind decoding when it is determined that all the candidates for all configured SS are not monitored.

6. A method of controlling blind decoding attempts by a User Equipment (UE) in a telecommunication network, the method comprising:
receiving, by the UE, a Downlink Control Information (DCI) indicating a number (N) of DCIs scheduled in a SS or a slot, wherein the number (N) of DCIs are signalled in all the DCIs;
determining, by the UE, if the count of DCIs received in the SS or the slot is equal to the number (N) of DCIs; and
removing, by the UE, remaining Physical Downlink Control Channel (PDCCH) candidates for blind decoding present in the SS or the slot when the count of DCIs received in the SS or the slot is identified to be equal to the number (N) of DCIs and then resuming the blind decoding procedure in other SS or slots, or resuming the blind decoding procedure when the count of DCIs received in the SS or the slot is identified to be not equal to the number (N) of DCIs.

Assignees

• Centre Of Excellence In Wireless Tech
• Indian Institute Of Tech Madras

Inventors

• Pardhasarathy Jyothi
• Agarwal Deepak
• Chacko Ebin
• Reddy Budama Sree Charan Teja
• Mohandoss Chandrasekaran
• Ramya Thirunageswaram Ramachandran
• Kaimalettu Sunil
• Milleth Jeniston Deviraj Klutto
• Ramamurthi Bhaskar

Classifications

• H04W72/23 Primary

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

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/006

  Quality of the received signal, e.g. BER, SNR, water filling · CPC title

• H04L5/0091

  Signalling for the administration of the divided path, e.g. signalling of configuration information · CPC title