Re-synchronization of temporary UE IDs in a wireless communication system
First Claim
1. An apparatus for wireless communication, comprising:
- at least one processor configured to send a random access preamble for random access by a user equipment (UE), to receive a random access response including a Temporary Cell Radio Network Temporary Identifier (C-RNTI), to use the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available, and to discard the Temporary C-RNTI and use the valid C-RNTI if available; and
a memory coupled to the at least one processor;
wherein the at least one processor is configured to send the random access preamble for timing synchronization update when the valid C-RNTI is available, and to discard the Temporary C-RNTI and continue to use the valid C-RNTI.
1 Assignment
0 Petitions
Accused Products
Abstract
Techniques for re-synchronizing Cell Radio Network Temporary Identifiers (C-RNTIs) in a wireless communication system are described. In one design, a user equipment (UE) sends a random access preamble for random access. A base station receives the random access preamble, assigns a Temporary C-RNTI to the UE, and sends a random access response including the Temporary C-RNTI. The UE uses the Temporary C-RNTI as a C-RNTI for itself if a valid C-RNTI is not already available. The UE discards the Temporary C-RNTI and uses the valid C-RNTI if available. The UE sends a transmission after receiving the random access response, and the transmission may include the valid C-RNTI if available. For handover, the base station (a target base station) receives a handover request from a source base station, assigns the valid C-RNTI to the UE, and sends the valid C-RNTI to the source base station for forwarding to the UE.
-
Citations
26 Claims
-
1. An apparatus for wireless communication, comprising:
-
at least one processor configured to send a random access preamble for random access by a user equipment (UE), to receive a random access response including a Temporary Cell Radio Network Temporary Identifier (C-RNTI), to use the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available, and to discard the Temporary C-RNTI and use the valid C-RNTI if available; and a memory coupled to the at least one processor; wherein the at least one processor is configured to send the random access preamble for timing synchronization update when the valid C-RNTI is available, and to discard the Temporary C-RNTI and continue to use the valid C-RNTI. - View Dependent Claims (2, 3, 4)
-
-
5. A method for wireless communication, comprising:
-
sending a random access preamble for random access by a user equipment (UE); receiving a random access response including a Temporary Cell Radio Network Temporary Identifier (C-RNTI); using the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available; and discarding the Temporary C-RNTI and using the valid C-RNTI if available; wherein the sending the random access preamble includes sending the random access preamble for timing synchronization update when the valid C-RNTI is available, and wherein the Temporary C-RNTI is discarded and the valid C-RNTI is used. - View Dependent Claims (6, 7)
-
-
8. An apparatus for wireless communication, comprising:
-
at least one processor configured to receive a random access preamble for random access by a user equipment (UE), to assign a Temporary Cell Radio Network Temporary Identifier (C-RNTI) to the UE, to send a random access response including the Temporary C-RNTI, to use the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available at the UE, and to release the Temporary C-RNTI and use the valid C-RNTI if received from the UE; and a memory coupled to the at least one processor; wherein the at least one processor is configured to receive the random access preamble from the UE for timing synchronization update when the UE already has the valid C-RNTI, to receive a transmission including the valid C-RNTI from the UE after sending the random access response, and to release the Temporary C-RNTI and use the valid C-RNTI for the UE. - View Dependent Claims (9, 10, 11)
-
-
12. A method for wireless communication, comprising:
-
receiving a random access preamble for random access by a user equipment (UE); assigning a Temporary Cell Radio Network Temporary Identifier (C-RNTI) to the UE; sending a random access response including the Temporary C-RNTI; using the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available at the UE; and releasing the Temporary C-RNTI and using the valid C-RNTI if received from the UE; wherein the receiving the random access preamble includes receiving the random access preamble from the UE for timing synchronization update when the UE already has the valid C-RNTI, wherein the method further includes receiving a transmission including the valid C-RNTI from the UE after sending the random access response, and wherein the Temporary C-RNTI is released and the valid C-RNTI is used for the UE. - View Dependent Claims (13, 14)
-
-
15. An apparatus for wireless communication, comprising:
-
means for sending a random access preamble for random access by a user equipment (UE); means for receiving a random access response including a Temporary Cell Radio Network Temporary Identifier (C-RNTI); means for using the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available; and means for discarding the Temporary C-RNTI and using the valid C-RNTI if available; wherein the means for sending the random access preamble includes means for sending the random access preamble for timing synchronization update when the valid C-RNTI is available, and wherein the Temporary C-RNTI is discarded and the valid C-RNTI is used. - View Dependent Claims (16, 17)
-
-
18. A non-transitory machine-readable medium comprising instructions which, when executed by a machine, cause the machine to perform operations including:
-
sending a random access preamble for random access by a user equipment (UE); receiving a random access response including a Temporary Cell Radio Network Temporary Identifier (C-RNTI); using the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available; and discarding the Temporary C-RNTI and using the valid C-RNTI if available; wherein the sending the random access preamble includes sending the random access preamble for timing synchronization update when the valid C-RNTI is available, and wherein the Temporary C-RNTI is discarded and the valid C-RNTI is used. - View Dependent Claims (19, 20)
-
-
21. An apparatus for wireless communication, comprising:
-
means for receiving a random access preamble for random access by a user equipment (UE); means for assigning a Temporary Cell Radio Network Temporary Identifier (C-RNTI) to the UE; means for sending a random access response including the Temporary C-RNTI; means for using the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available at the UE; and means for releasing the Temporary C-RNTI and using the valid C-RNTI if received from the UE; wherein the means for receiving the random access preamble includes means for receiving the random access preamble from the UE for timing synchronization update when the UE already has the valid C-RNTI, wherein the apparatus further includes means for receiving a transmission including the valid C-RNTI from the UE after the random access response is sent, and wherein the Temporary C-RNTI is released and the valid C-RNTI is used for the UE. - View Dependent Claims (22, 23)
-
-
24. A non-transitory machine-readable medium comprising instructions which, when executed by a machine, cause the machine to perform operations including:
-
receiving a random access preamble for random access by a user equipment (UE); assigning a Temporary Cell Radio Network Temporary Identifier (C-RNTI) to the UE; sending a random access response including the Temporary C-RNTI; using the Temporary C-RNTI as a C-RNTI for the UE if a valid C-RNTI is not already available at the UE; and releasing the Temporary C-RNTI and using the valid C-RNTI if received from the UE; wherein the receiving the random access preamble includes receiving the random access preamble from the UE for timing synchronization update when the UE already has the valid C-RNTI, wherein the operations further include receiving a transmission including the valid C-RNTI from the UE after sending the random access response, and wherein the Temporary C-RNTI is released and the valid C-RNTI is used for the UE. - View Dependent Claims (25, 26)
-
Specification