Method for signaling back-off information in random access
First Claim
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1. A method for performing a random access procedure in a wireless communication system, the method comprising:
- transmitting a first preamble for random access from a mobile station to a network;
receiving by the mobile station a random access response message from the network as a response to the first preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC Random Access Responses (MAC RARs);
determining if a field in a MAC sub-header of the MAC header indicates a backoff parameter exists in the MAC sub-header;
obtaining the backoff parameter from the MAC sub-header when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header; and
performing backoff using the backoff parameter obtained from the MAC sub-header,wherein there is no corresponding MAC RAR in the random access response message when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header.
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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.
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Citations
24 Claims
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1. A method for performing a random access procedure in a wireless communication system, the method comprising:
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transmitting a first preamble for random access from a mobile station to a network; receiving by the mobile station a random access response message from the network as a response to the first preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC Random Access Responses (MAC RARs); determining if a field in a MAC sub-header of the MAC header indicates a backoff parameter exists in the MAC sub-header; obtaining the backoff parameter from the MAC sub-header when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header; and performing backoff using the backoff parameter obtained from the MAC sub-header, wherein there is no corresponding MAC RAR in the random access response message when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for performing a random access procedure in a wireless communication system, the method comprising:
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receiving at a network a first preamble for random access from a mobile terminal; transmitting by the network a random access response message to the mobile terminal as a response to the first preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC Random Access Responses (MAC RARs), wherein the MAC header comprises a MAC sub-header including a field indicating whether or not the MAC sub-header has a backoff parameter configured to enable the mobile terminal to perform backoff; determining, by the mobile terminal, if the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header; obtaining, by the mobile terminal, the backoff parameter from the MAC sub-header when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header; and performing, by the mobile terminal, backoff using the backoff parameter obtained from the MAC sub-header, wherein there is no corresponding MAC RAR in the random access response message when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A mobile terminal configured to perform a random access procedure in a wireless communication system, comprising:
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a processor configured to cause the mobile terminal to transmit a first preamble for random access to a network; process a random access response message received from the network as a response to the first preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC Random Access Responses (MAC RARs); determine if a field in a MAC sub-header of the MAC header indicates a backoff parameter exists in the MAC sub-header; obtain the backoff parameter from the MAC sub-header when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header; and perform backoff using the backoff information obtained from the MAC sub-header, wherein there is no corresponding MAC RAR in the random access response message when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A network configured to perform a random access procedure in a wireless communication system, comprising:
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a processor configured to cause the network to process a first preamble for random access received from a mobile terminal; and
to transmit a random access response message to the mobile terminal as a response to the first preamble, the random access response message having a MAC (Medium Access Control) header and zero or more MAC Random Access Responses (MAC RARs),wherein the MAC header includes a MAC sub-header including a field indicating whether or not the MAC sub-header includes a backoff parameter, and wherein there is no corresponding MAC RAR in the random access response message when the field in the MAC sub-header indicates the backoff parameter exists in the MAC sub-header. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification