Methods to reduce number of blind decoding attempts done by a User Equipment

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 first Search Space (SS) configuration to the UE;

configuring, by the BS, a second SS configuration, wherein the second configuration is one of:

a subset of Aggregation Levels (ALs) to be monitored based on channel quality of the UE and Downlink Control Information (DCI) payload and an associated time period, and

one or more values of multiplication factor (k) associated with one or more of the ALs and an associated time period,

signaling by the BS, at least one of the first SS configuration and second SS configuration to the UE;

iteratively monitoring, by the UE, DCI on the ALs signalled by the BS;

performing, by the UE, one of blind decoding using received second SS configuration when the new second SS configuration is received before the timer expiry and the blind decoding by one of utilizing a default second SS configuration, adopting the existing second SS configuration, requesting the BS for a new second SS configuration and utilizing the first SS configuration when the new second SS configuration is not received by the UE before the timer expires.

2. The method as claimed in claim 1 , wherein the UE monitors the DCI based on the existing configuration until a predefined time period expires.

3. The method as claimed in claim 1 , wherein the UE determines a number of DCI candidates in each AL in all SS sets based on the value of multiplication factor (k).

4. The method as claimed in claim 1 , further comprising:

sending, by the UE, a feedback signal including a subset of AL values selected from the list of ALs, in the first SS configuration to the gNB, wherein the subset of AL values is selected by the UE based on at least one of previous blind decoding attempts at the UE and channel conditions;

selecting, by the gNB, a usable AL from the subset of AL values based on at least one of DCI payload size and channel conditions; and

performing, by the UE, the blind decoding based on the subset of AL informed to the gNB through the feedback signal.

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 first Search Space (SS) configuration to the UE;

configuring, by the BS, a second SS configuration, wherein the second SS configuration is type of SS to be one of monitored and not monitored for each slot in a given time period;

signalling, by the BS, at least one of the first SS configuration and the second SS configuration to the UE;

iteratively monitoring, by the UE, for Downlink Control Information (DCI) in at least one of Common SS (CSS) and UE-specific SS (USS) in at least one slot present in the given time period, based on a configuration corresponding to the at least one slot; and

performing, by the UE, one of blind decoding using received second SS configuration when the new second SS configuration is received before the timer expiry and the blind decoding by one of utilizing a default second SS configuration, adopting the existing second SS configuration, requesting the BS for a new second SS configuration and utilizing the first SS configuration when the new second SS configuration is not received by the UE before the timer expires.

6. The method as claimed in claim 5 , wherein the UE monitors at least one of the CSS and the USS until a predefined time period expires.

7. The method as claimed in claim 5 , 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.

8. 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 first Search Space (SS) configuration to the UE;

configuring, by a Base Station (BS), a second SS configuration to the UE, wherein the second SS configuration is at least one multiplication factor (c) for at least one SS set and an associated time period;

signalling, by the BS, at least one of first SS configuration and second SS configuration to the UE;

updating, by the UE, a payload size of the Downlink Control Information (DCI) for the at least one SS set and scaling AL size based on the at least one multiplication factor (c);

iteratively monitoring, by the UE, for ‘c’ concatenated DCIs in the at least one SS set with the updated payload size and AL size, wherein the concatenated DCIs belong to one of the same format and same Radio Network Temporary Identifier (RNTI); and

performing, by the UE, one of blind decoding using received second SS configuration when the new second SS configuration is received before the timer expiry and the blind decoding by one of utilizing a default second SS configuration, adopting the existing second SS configuration, requesting the BS for a new second SS configuration and utilizing the first SS configuration when the new second SS configuration is not received by the UE before the timer expires.

9. The method as claimed in claim 8 , wherein the UE updates the payload size of DCI to be monitored for the at least one SS set and scales the AL size when the UE receives a new configuration.

10. The method as claimed in claim 8 , 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.