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

Patent metadata

Field	Value
Publication number	US-12238741-B2
Application number	US-202318365889-A
Country	US
Kind code	B2
Filing date	Aug 4, 2023
Priority date	Oct 14, 2020
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

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), a Search Space (SS) configuration to the UE;
dividing, by the BS, the Downlink Control Information (DCI) s into high priority and low priority DCIs;
scheduling, by the BS, high priority Downlink Control Information (DCIs) prior to low priority DCIs;
monitoring, by the UE, for a DCI in SS based on the SS configuration;
determining, by the UE, if an indicator for a last DCI with high priority is received; and
resuming, by the UE, the monitoring for the DCI in the SS when the indicator for the last DCI with high priority is not received, and not monitoring for DCIs with low priority when the indicator for the last DCI with high priority is received and it is determined that the UE can afford loss of the remaining DCIs with low priority.

2. The method as claimed in claim 1 , wherein when the last DCI with high priority is identified to be present in CSS, an indicator field is present in a bit map form for all UEs receiving the DCI in the CSS or a separate UE index and an associated indicator flag is present for each of the UEs receiving the DCI in the CSS.

3. The method as claimed in claim 1 , wherein when the DCI is present in USS, only an indicator field is present.

4. A method of controlling blind decoding attempts by a User Equipment (UE) in a telecommunication network, the method comprising:
signalling, by the Base Station (BS), first information, wherein the first information is about a plurality of sub-regions within a Control Resource Set (CORESET);
signalling, by the BS, to the UE, the second information, wherein the second information is about at least one sub-region to be monitored amongst the plurality of sub-regions;
dividing, by the UE, the CORESET into a plurality of sub-regions, based on the first information received from the BS;
generating, by the UE, a list of Physical Downlink Control Channel (PDCCH) candidates;
selecting, by the UE, a PDCCH candidate from the list of PDCCH candidates;
determining, by the UE, if the PDCCH candidate starts within the at least one sub-region in the second information;
processing, by the UE, the PDCCH candidate when the PDCCH candidate identity identified to be starting within the at least one sub-region in the second information, and selecting a next PDCCH candidate when the PDCCH candidate is identified not to be starting within the at least one sub-region in the second information.

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

6. 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 for the UEs;
configuring, by the BS, a bitmap of SS to be monitored by the UE;
signaling, by the BS, one of the bitmap and an index of the table containing all combinations of bitmaps to the UE, wherein the bitmap includes information related to at least one SS containing Downlink Control Information (DCI);
monitoring, by the UE, the DCI based on the SS configuration till the bitmap is received from the BS; and
monitoring, by the UE, a SS for which a corresponding bit is enabled in the bitmap and excluding monitoring of remaining SS.

7. The method as claimed in claim 6 , wherein the bitmap is prepared based on parameters including traffic of the UE, previous scheduling patterns for the UE, number of UEs in a cell, channel quality of the UE, and compromise in scheduling flexibility.

8. The method as claimed in claim 6 , wherein the bitmap is sent through a RRC message, MAC CE or DCI, in a semi periodic approach, and wherein the bitmap is configured for a predefined time period in the semi periodic approach and the UE performs blind decoding till expiry of the predefined time period.

9. The method as claimed in claim 8 , wherein the BS schedules the DCIs for the UE in the search spaces corresponding to the bits enabled in the bitmap.

10. The method as claimed in claim 6 , wherein the bitmap is sent using a separate dedicated resources in a dynamic approach, and wherein a bitmap per slot is defined only for slots where scheduled DCI does not exist in an allocated SS.

Assignees

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

Inventors

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

Classifications

• 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

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04L5/0064

  Rate requirement of the data, e.g. scalable bandwidth, data priority · CPC title

• H04L5/0091

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

• H04L5/006

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