Packet traffic channel reassignment
First Claim
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1. A method of deallocating at least one packet traffic channel to which a plurality of mobile stations have reserved access, said method comprising the steps of:
- monitoring, by each of the plurality of mobile stations, a downlink transmission, said monitoring step comprising;
monitoring, by each of the plurality of mobile stations, a packet channel feedback field in the downlink transmission, said packet channel feedback field comprising a feedback sub-field and an allocation sub-field; and
examining, by each of the plurality of mobile stations, the allocation sub-field for the multicast address only when the feedback sub-field comprises a value indicating that the allocation sub-field is to be examined; and
switching, by each of the plurality of mobile stations, to a different channel in response to the downlink transmission comprising a multicast address.
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Abstract
The present invention provides a method and system for quickly deallocating packet traffic channels. According to exemplary embodiments of the present invention, the capability of performing point-to-multipoint communications is provided on the PTCH by defining a multicast address that all mobiles read. Through the use of a multicast address, a plurality of mobile stations can simultaneously be notified of the termination of PTCH services. As a result, the network can reallocate PTCH resources in a minimum amount of time.
87 Citations
18 Claims
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1. A method of deallocating at least one packet traffic channel to which a plurality of mobile stations have reserved access, said method comprising the steps of:
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monitoring, by each of the plurality of mobile stations, a downlink transmission, said monitoring step comprising;
monitoring, by each of the plurality of mobile stations, a packet channel feedback field in the downlink transmission, said packet channel feedback field comprising a feedback sub-field and an allocation sub-field; and
examining, by each of the plurality of mobile stations, the allocation sub-field for the multicast address only when the feedback sub-field comprises a value indicating that the allocation sub-field is to be examined; and
switching, by each of the plurality of mobile stations, to a different channel in response to the downlink transmission comprising a multicast address. - View Dependent Claims (3, 5, 6)
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2. A method of deallocating at least one packet traffic channel to which a plurality of mobile stations have reserved access, said method comprising the steps of:
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monitoring, by each of the plurality of mobile stations, a downlink transmission;
performing, by each of the plurality of mobile stations, a cyclic redundancy check on a packet data unit received in the downlink transmission using the multicast address;
performing, by each of the plurality of mobile stations, a cyclic redundancy check on the packet data unit using a temporary address; and
switching, by each of the plurality of mobile stations, to a different channel in response to the downlink transmission comprising a multicast address, wherein said switching step is performed in response to a successful step of performing the cyclic redundancy check using the multicast address. - View Dependent Claims (4)
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7. A mobile station comprising:
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means for monitoring a downlink transmission on a packet traffic channel, said means for monitoring comprising;
means for monitoring a packet channel feedback field in the downlink transmission, said packet channel feedback field comprising a feedback sub-field and an allocation sub-field; and
means for examining the allocation sub-field for the multicast address only when the feedback sub-field comprises a value indicating that the allocation sub-field is to be examined; and
means for switching to a different channel in response to the downlink transmission comprising a multicast address.
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8. A mobile station comprising:
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means for monitoring a downlink transmission on a packet traffic channel;
a first cyclic redundancy check engine for performing a cyclic redundancy check on a packet data unit received in the downlink transmission using the multicast address;
a second code redundancy check engine for performing a cyclic redundancy check on the packet data unit using a temporary address; and
means for switching to a different channel in response to the downlink transmission comprising a multicast address, wherein said switching means switches to a different channel in response to successfully performing the cyclic redundancy check using the multicast address. - View Dependent Claims (9, 10, 11, 12)
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13. A method of deallocating at least one packet traffic channel to which a plurality of mobile stations have reserved access, said method comprising the steps of:
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monitoring, by each of the plurality of mobile stations, a packet channel feedback field in a downlink transmission, said packet channel feedback field comprising a feedback sub-field and an assignment sub-field;
examining, by each of the plurality of mobile stations, the assignment sub-field when the feedback sub-field contains a predetermined value; and
switching, by each of the plurality of mobile stations, to a different channel in response to the assignment sub-field comprising a predetermined indication value. - View Dependent Claims (14, 15)
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16. A system for deallocating at least one packet traffic channel in a radiocommunication system, said system comprising:
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a network that transmits and receives data on the at least one packet traffic channel; and
a plurality of mobile stations that have reserved access to the at least one packet traffic channel, each of said plurality of mobile stations comprising;
means for monitoring a packet channel feedback field in a downlink transmission from the network, said packet channel feedback field comprising a feedback sub-field and an assignment sub-field;
means for examining the assignment sub-field when the feedback sub-field contains a predetermined value; and
means for switching to a different channel in response to the assignment sub-field comprising a predetermined indication value. - View Dependent Claims (17, 18)
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Specification