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 base station;
- and
- receiving by the mobile station a random access response message from the base station 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 comprises a MAC sub-header, wherein the MAC sub-header consists of 8 bits including a first bit directly followed by a second bit, and the MAC sub-header starts with the first bit,
- wherein the first bit indicates whether or not more fields are included in the MAC header,
- wherein the second bit indicates a backoff parameter, and
- wherein, when the second bit indicates the MAC sub-header has the backoff parameter, the random access response message has no MAC RAR.
A method for performing a random access procedure by a base station in a wireless communication system, the method comprising:
- receiving, by the base station, a preamble for random access from a mobile station;
- and
- transmitting, by the base station, 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 comprises a MAC sub-header, wherein the MAC sub-header consists of 8 bits including a first bit directly followed by a second bit, and the MAC sub-header starts with the first bit,
- wherein the first bit indicates whether or not more fields are included in the MAC header,
- wherein the second bit indicates a backoff parameter, and
- wherein, when the second bit indicates the MAC sub-header has the backoff parameter, the random access response message has no MAC RAR.
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 base station, and
- receive a random access response message from the base station 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 comprises a MAC sub-header, wherein the MAC sub-header consists of 8 bits including a first bit directly followed by a second bit, and the MAC sub-header starts with the first bit,
- wherein the first bit indicates whether or not more fields are included in the MAC header,
- wherein the second bit indicates a backoff parameter, and
- wherein, when the second bit indicates the MAC sub-header has the backoff parameter, the random access response message has no MAC RAR.
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 comprises a MAC sub-header, wherein the MAC sub-header consists of 8 bits including a first bit directly followed by a second bit, and the MAC sub-header starts with the first bit,
- wherein the first bit indicates whether or not more fields are included in the MAC header,
- wherein the second bit indicates a backoff parameter, and
- wherein, when the second bit indicates the MAC sub-header has the backoff parameter, the random access response message has no MAC RAR.
Dependencies are inferred from the claim text.