Method and apparatus for re-transmission of system information message in mobile communications
Various solutions for re-transmission of system information (SI) message with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a first physical downlink shared channel (PDSCH) from a network node. The apparatus may receiving a second PDSCH from the network node. The apparatus may determine whether a timing gap between the first PDSCH and the second PDSCH is less than a predetermined processing time. The apparatus may ignore the second PDSCH in an event that the timing gap is less than the predetermined processing time.
1. A method for re-transmission of system information (SI) message in mobile communications, comprising:
receiving, by a processor of an apparatus, a first physical downlink shared channel (PDSCH) from a network node;
receiving, by the processor, a second PDSCH from the network node;
determining, by the processor, a predetermined processing time according to a PDSCH processing capability by selecting a number of symbols corresponding to a subcarrier spacing configuration;
determining, by the processor, whether a timing gap between the first PDSCH and the second PDSCH is less than the predetermined processing time; and
skipping, by the processor, decoding of the second PDSCH in an event that the timing gap is less than the predetermined processing time.
2. The method of claim 1 , wherein the second PDSCH comprises a re-transmission of the first PDSCH.
3. The method of claim 1 , further comprising:
decoding, by the processor, the second PDSCH in an event that the timing gap is equal to or greater than the predetermined processing time.
4. The method of claim 1 , wherein the determining comprises determining whether a starting symbol of the second PDSCH is less than a predetermined number of symbols after a last symbol of the first PDSCH.
5. The method of claim 4 , further comprising:
determining, by the processor, the predetermined number of symbols according to a subcarrier spacing configuration.
6. The method of claim 1 , wherein the predetermined processing time comprises a PDSCH processing time.
7. The method of claim 1 , wherein the second PDSCH comprises a SI repetition.
8. The method of claim 7 , further comprising:
determining, by the processor, whether the second PDSCH comprises the SI repetition according to an SI-window or according to the SI-window and downlink control information (DCI) format 1_0 with cyclic redundancy check (CRC) scrambled by system information-radio network temporary identifier (SI-RNTI).
9. An apparatus for re-transmission of system information (SI) message in mobile communications, comprising:
a transceiver which, during operation, wirelessly communicates with a network node of a wireless network; and
a processor communicatively coupled to the transceiver such that, during operation, the processor performs operations comprising:
receiving, via the transceiver, a first physical downlink shared channel (PDSCH) from the network node;
receiving, via the transceiver, a second PDSCH from the network node;
determining a predetermined processing time according to a PDSCH processing capability by selecting a number of symbols corresponding to a subcarrier spacing configuration;
determining whether a timing gap between the first PDSCH and the second PDSCH is less than a predetermined processing time; and
skipping decoding of ignoring the second PDSCH in an event that the timing gap is less than the predetermined processing time.
10. The apparatus of claim 9 , wherein the second PDSCH comprises a re-transmission of the first PDSCH.
11. The apparatus of claim 9 , wherein, during operation, the processor further performs operations comprising:
decoding the second PDSCH in an event that the timing gap is equal to or greater than the predetermined processing time.
12. The apparatus of claim 9 , wherein, in determining whether a timing gap between the first PDSCH and the second PDSCH is less than a predetermined processing time, the processor determines whether a starting symbol of the second PDSCH is less than a predetermined number of symbols after a last symbol of the first PDSCH.
13. The apparatus of claim 12 , wherein, during operation, the processor further performs operations comprising:
determining the predetermined number of symbols according to a subcarrier spacing configuration.
14. The apparatus of claim 9 , wherein the predetermined processing time comprises a PDSCH processing time.
15. The apparatus of claim 9 , wherein the second PDSCH comprises a SI repetition.
16. The apparatus of claim 15 , wherein, during operation, the processor further performs operations comprising:
determining whether the second PDSCH comprises the SI repetition according to an SI-window or according to the SI-window and a downlink control information (DCI) format 1_0 with cyclic redundancy check (CRC) scrambled by system information-radio network temporary identifier (SI-RNTI).