Pre-allocated random access identifiers
DC CAFC
First Claim
Patent Images
1. A method of operating a mobile station, comprising:
- receiving, from a serving base station, an indication of a first reserved set of access identifiers usable for non-contention access over a first random access channel in a coverage area of the serving base station;
obtaining, during a handover of the mobile station from the serving base station to a target base station, an indication of a non-contention reserved access identifier identifying the mobile station in a coverage area of the target base station;
transmitting the non-contention reserved access identifier to the target base station over a second random access channel in the coverage area of the target base station;
receiving, from the target base station, a feedback message comprising a timing adjustment; and
adjusting at least one operating parameter of a transmission from the mobile station to the target base station based at least in part on the feedback message.
4 Assignments
Litigations
2 Petitions
Accused Products
Abstract
Systems and methods of pre-allocating identifiers to wireless devices for use in requesting resources over a random access channel are described. A wireless communication system includes a random access channel over which wireless devices can anonymously send requests for resources. The base stations receiving and processing the anonymous requests reduces the probability of random access channel collisions and conserves the resources needed to support the anonymous requests by pre-allocating one or more identifiers to select wireless devices. The wireless devices having the pre-allocated codes can transmit a particular code over the random access channel as a request for resources that uniquely identifies the requester.
41 Citations
30 Claims
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1. A method of operating a mobile station, comprising:
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receiving, from a serving base station, an indication of a first reserved set of access identifiers usable for non-contention access over a first random access channel in a coverage area of the serving base station; obtaining, during a handover of the mobile station from the serving base station to a target base station, an indication of a non-contention reserved access identifier identifying the mobile station in a coverage area of the target base station; transmitting the non-contention reserved access identifier to the target base station over a second random access channel in the coverage area of the target base station; receiving, from the target base station, a feedback message comprising a timing adjustment; and adjusting at least one operating parameter of a transmission from the mobile station to the target base station based at least in part on the feedback message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of operating a mobile station, comprising:
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receiving a message providing the mobile station with an indication of a non-contention reserved access identifier available for use by the mobile station in a coverage area of a target base station, the non-contention reserved access identifier belonging to a set of access identifiers reserved for non-contention access to the target base station; receiving information about a shared random access channel available in the coverage area of the target base station; transmitting the non-contention reserved access identifier to the target base station over the shared random access channel for handover; receiving from the target base station a feedback message comprising a timing adjustment; and adjusting uplink transmission timing of the mobile station using the timing adjustment. - View Dependent Claims (13, 14, 15)
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16. A mobile station comprising:
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a receiver operable to receive, from a serving base station, an indication of a first reserved set of access identifiers usable for non-contention access over a first random access channel in a coverage area of the serving base station; the receiver further operable to receive, during a handover of the mobile station from the serving base station to a target base station, an indication of a non-contention reserved access identifier identifying the mobile station in a coverage area of the target base station; a transmitter operable to transmit the non-contention reserved access identifier to the target base station over a second random access channel in the coverage area of the target base station; the receiver further operable to receive, from the target base station, a feedback message comprising a timing adjustment; and a processor operable to adjust at least one operating parameter of a transmission from the mobile station to the target base station, the adjusting based at least in part on the feedback message. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A mobile station comprising:
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a processor operable to; receive a message providing an indication of a non-contention reserved access identifier available for use by the mobile station in a coverage area of a target base station, the non-contention reserved access identifier belonging to a set of access identifiers reserved for non-contention access to the target base station; and receive information about a shared random access channel available in the coverage area of the target base station; a transmitter operable to transmit the non-contention reserved access identifier to the target base station over the shared random access channel; a receiver operable to receive from the target base station a feedback message comprising a timing adjustment; and the processor further operable to adjust uplink transmission timing of the mobile station using the timing adjustment. - View Dependent Claims (28, 29, 30)
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Specification
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Litigation Data
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Current AssigneeQuarterhill Inc. (f/k/a Wi-LAN Inc.)
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Original AssigneeWi-LAN Inc.
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InventorsBourlas, Yair, Newham, Adam E., Wang, Lei, Gummadi, Srikanth
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Primary Examiner(s)Lai, Andrew
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Assistant Examiner(s)Nguyen, Chuong M
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Application NumberUS14/831,525Publication NumberTime in Patent Office131 DaysField of SearchUS Class Current1/1CPC Class CodesH04B 7/2668 Arrangements for Wireless C...H04J 11/0073 Acquisition of primary sync...H04L 27/2601 Multicarrier modulation sys...H04L 5/0051 of dedicated pilots, i.e. p...H04W 36/0016 Hand-off preparation specia...H04W 36/08 Reselecting an access pointH04W 64/006 with additional information...H04W 72/23 in the downlink direction o...H04W 72/51 based on terminal or device...H04W 74/004 in the uplink, i.e. towards...H04W 74/006 in the downlink, i.e. towar...H04W 74/0833 Random access procedures, e...H04W 74/085 collision avoidanceH04W 74/0875 with assigned priorities ba...H04W 74/0891 for synchronized accessH04W 76/28 Discontinuous transmission ...H04W 88/02 Terminal devicesH04W 88/08 Access point devices
