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US 2011/0216705 A1Published application
Method for signaling back-off information in random access
AssigneeLG Electronics Inc.
InventorsYoung Dae LEE, Sung Jun Park, Seung June Yi, Sung Duck Chun
Life of this patent
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Abstract
A method for performing random access in a wireless communication system is provided. The method includes transmitting a preamble for random access in uplink, receiving a random access response message including back-off information as a response to the preamble, and performing back-off using the back-off information when the random access has failed.
Claims16
A method for performing a random access procedure in a wireless communication system, the method comprising:
- transmitting a preamble for random access from a mobile station to a network;
- and
- receiving by the mobile station a random access response message from the network as a response to the preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC random access responses (RARs),
- wherein the MAC header includes a first MAC sub-header followed by a second MAC sub-header,
- wherein the first MAC sub-header includes a corresponding first 1-bit field directly followed by a corresponding second 1-bit field,
- wherein the second MAC sub-header includes a corresponding first 1-bit field directly followed by a corresponding second 1-bit field,
- wherein the first 1-bit field of the first MAC sub-header and/or the first 1-bit field of the second MAC sub-header indicates whether or not more fields are included in the MAC header,
- wherein, when the second 1-bit field of the first MAC sub-header indicates the first MAC sub-header includes a backoff parameter, there is no MAC RAR corresponding to the first MAC sub-header in the random access response message, and
- wherein, when the second 1-bit field of the second MAC sub-header indicates the second MAC sub-header includes a first random access preamble identifier, the random access response message includes a MAC RAR corresponding to the first random access preamble identifier.
6 more elements
A method for performing a random access procedure in a wireless communication system, the method comprising:
- receiving, by a network, a preamble for random access from a mobile station;
- and
- transmitting, by the network, to the mobile station a random access response message as a response to the preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC random access responses (RARs),
- wherein the MAC header includes a first MAC sub-header followed by a second MAC sub-header,
- wherein the first MAC sub-header includes a corresponding first 1-bit field directly followed by a corresponding second 1-bit field,
- wherein the second MAC sub-header includes a corresponding first 1-bit field directly followed by a corresponding second 1-bit field,
- wherein the first 1-bit field of the first MAC sub-header and/or the first 1-bit field of the second MAC sub-header indicates whether or not more fields are included in the MAC header,
- wherein, when the second 1-bit field of the first MAC sub-header indicates the first MAC sub-header includes a backoff parameter, there is no MAC RAR corresponding to the first MAC sub-header in the random access response message, and
- wherein, when the second 1-bit field of the second MAC sub-header indicates the second MAC sub-header includes a first random access preamble identifier, the random access response message includes a MAC RAR corresponding to the first random access preamble identifier.
6 more elements
A mobile terminal configured to perform a random access procedure in a wireless communication system, comprising:
- a processor configured to cause the mobile terminal to transmit a preamble for random access to a network, and
- receive a random access response message from the network as a response to the preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC random access responses (RARs),
- wherein the MAC header includes a first MAC sub-header followed by a second MAC sub-header,
- wherein the first MAC sub-header includes a corresponding first 1-bit field directly followed by a corresponding second 1-bit field,
- wherein the second MAC sub-header includes a corresponding first 1-bit field directly followed by a corresponding second 1-bit field,
- wherein the first 1-bit field of the first MAC sub-header and/or the first 1-bit field of the second MAC sub-header indicates whether or not more fields are included in the MAC header,
- wherein, when the second 1-bit field of the first MAC sub-header indicates the first MAC sub-header includes a backoff parameter, there is no MAC RAR corresponding to the first MAC sub-header in the random access response message, and
- wherein, when the second 1-bit field of the second MAC sub-header indicates the second MAC sub-header includes a first random access preamble identifier, the random access response message includes a MAC RAR corresponding to the first random access preamble identifier.
5 more elements
A network configured to perform a random access procedure in a wireless communication system, comprising:
- a processor configured to
- receive a preamble for random access from a mobile station, and
- transmit to the mobile station a random access response message as a response to the preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC random access responses (RARs),
- wherein the MAC header includes a first MAC sub-header followed by a second MAC sub-header,
- wherein the first MAC sub-header includes a corresponding first 1-bit field directly followed by a corresponding second 1-bit field,
- wherein the second MAC sub-header includes a corresponding first 1-bit field directly followed by a corresponding second 1-bit field,
- wherein the first 1-bit field of the first MAC sub-header and/or the first 1-bit field of the second MAC sub-header indicates whether or not more fields are included in the MAC header,
- wherein, when the second 1-bit field of the first MAC sub-header indicates the first MAC sub-header includes a backoff parameter, there is no MAC RAR corresponding to the first MAC sub-header in the random access response message, and
- wherein, when the second 1-bit field of the second MAC sub-header indicates the second MAC sub-header includes a first random access preamble identifier, the random access response message includes a MAC RAR corresponding to the first random access preamble identifier.
6 more elements
Dependencies are inferred from the claim text.