METHOD AND APPARATUS FOR SYSTEM INFORMATION BLOCK (SIB) ACQUISITION FOR WIRELESS TRANSMIT/RECEIVE UNITS (WTRUS) IN NON-CE AND COVERAGE ENHANCED (CE) MODES

• US 20200137669A1
• Filed: 12/23/2019
• Published: 04/30/2020
• Est. Priority Date: 03/19/2014
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Lee, Moon-il, Stern-Berkowitz, Janet A., Kaur, Samian, Pani, Diana
• Granted Patent: US 10,986,564 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers

Abstract

A method and apparatus are described. A method includes determining whether the apparatus is in a coverage enhancement (CE) mode or a non-CE mode. The method further includes receiving a CE-system information block (CE-SIB) on a physical downlink shared channel (PDSCH) based on at least one of a known location or at least one known parameter for the CE-SIB, on a condition that the WTRU is determined to be in the CE mode.

Claims

1. A method, implemented in a wireless transmit/receive unit (WTRU), the method comprising:

receiving a signal derived from a paging radio network temporary identifier (P-RNTI), wherein the signal includes downlink control information (DCI), the signal is without downlink (DL) grant information for an associated paging message, and the DCI includes at least one of a single bit indication of system information modification, an earthquake tsunami warning system (ETWS) indication, or a commercial mobile alert service (CMAS) indication; and

on a condition that the at least one single bit indication indicates that a system information block (SIB) has changed or will change, acquiring or re-acquiring the SIB.

2. The method of claim 1, wherein the single bit has a value of TRUE to indicate that one or more SIBs associated with the system information modification has changed or will change.

3. The method of claim 1, wherein the single bit has a value of TRUE to indicate that one or more SIBs that are associated with the ETWS or CMAS have changed or will change.

4. The method of claim 1, further comprising:

on a condition that the single bit indication for ETWS or CMAS indicates that a SIB has changed or will change, acquiring or re-acquiring SIB-1 before acquiring or re-acquiring the SIB.

5. The method of claim 1, further comprising receiving, on a physical broadcast channel (PBCH), one or more parameters for receiving and monitoring a physical downlink control channel (PDCCH) in a common search space for the SIB.

6. The method of claim 5, wherein the one or more parameters comprises at least one of a time location and a frequency location of the common search space.

7. The method of claim 6, wherein the time location comprises at least one of an identity of one or more frames or a starting symbol.

8. The method of claim 6, wherein the frequency location comprises at least one of a set of resource blocks (RBs), a number of RBs or a starting RB.

9. A wireless transmit/receive unit (WTRU) comprising:

a transceiver; and

a processor,

wherein the transceiver and the processor are configured to receive a signal derived from a paging radio network temporary identifier (P-RNTI), wherein the signal includes downlink control information (DCI), the signal is without downlink (DL) grant information for an associated paging message, and the DCI includes at least one of a single bit indication of system information modification, an earthquake tsunami warning system (ETWS), or a commercial mobile alert service (CMAS), and

wherein the transceiver and the processor are further configured to acquire or re-acquire a system information block (SIB) on a condition that the at least one single bit indication indicates that the SIB has changed or will change.

10. The WTRU of claim 9, wherein the single bit indication of system information modification has a value of TRUE to indicate that one or more SIBs associated with the system information modification indication have changed or will change.

11. The WTRU of claim 9, wherein the single bit indication for ETWS or CMAS has a value of TRUE to indicate that one or more SIBs that are associated with the ETWS or CMAS have changed or will change.

12. The WTRU of claim 9, wherein the processor and the transceiver are further configured to acquire or re-acquire SIB-1 before acquiring or re-acquiring a SIB on a condition that the single bit indication for ETWS or CMAS indicates that the SIB has changed or will change.

13. The WTRU of claim 9, wherein the processor and the transceiver are further configured to receive, on a physical broadcast channel (PBCH), one or more parameters for receiving and monitoring a physical downlink control channel (PDCCH) in a common search space for the SIB.

14. The method of claim 13, wherein the one or more parameters comprises at least one of a time location and a frequency location of the common search space.

15. The method of claim 14, wherein the time location comprises at least one of an identity of one or more frames or a starting symbol.

16. The method of claim 14, wherein the frequency location comprises at least one of a set of resource blocks (RBs), a number of RBs or a starting RB.