Method and apparatus for improving a mobile station cell change operation in the general packet radio system (GPRS)
First Claim
1. A method comprising:
- entering a new cell;
generating a cell change logical link control packet data unit message for informing the network of the location of the mobile station in the new cell;
buffering the cell change logical link control packet data unit message into a logical link control packet data unit message transmit queue such that it is selected for transmission prior to any buffered packet data units that were present before the mobile station entered the new cell; and
transmitting the buffered cell change packet data unit before any of the buffered packet data units that were present before the mobile station entered the new cell.
11 Assignments
0 Petitions
Accused Products
Abstract
A mobile station executed method, wherein upon changing from a current cell to a new cell in a wireless packet data network the mobile station enters the new cell; generates a cell change packet data unit (PDU) message for informing the network of the location of the mobile station in the new cell; buffers the cell change PDU message into a PDU transmit queue before any buffered PDUs that were present before the mobile station entered the new cell; and transmits the buffered cell change PDU before any of the buffered PDUs that were present before the mobile station entered the new cell. In accordance with another method for informing the wireless network of the MS cell change, the following steps are executed: (i) in response to the MS making access in a new cell, sending a Channel Request that indicates a Cell Update operation; (ii) establishing an uplink (UL) Temporary Block Flow (TBF) for transferring Logical Link Control (LLC) Packet Data Units (PDUs) from the MS to the network; (iii) in response to the network receiving an unknown Temporary Logical Link Identifier (TLLI) from the MS, sending a message to a Serving GPRS Support Node (SGSN) and (iv) based on the message, determining with the SGSN the new cell location of the MS.
14 Citations
42 Claims
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1. A method comprising:
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entering a new cell; generating a cell change logical link control packet data unit message for informing the network of the location of the mobile station in the new cell; buffering the cell change logical link control packet data unit message into a logical link control packet data unit message transmit queue such that it is selected for transmission prior to any buffered packet data units that were present before the mobile station entered the new cell; and transmitting the buffered cell change packet data unit before any of the buffered packet data units that were present before the mobile station entered the new cell. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10)
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4. (canceled)
- 11. An apparatus comprising a packet data buffer and a controller that is responsive to changing location from a previous cell to a new cell in a wireless packet data network for generating a cell change logical link control packet data unit message for informing the wireless packet data network of the presence of the apparatus in the new cell and for buffering the cell change logical link control packet data unit message into the packet data buffer such that it is selected for transmission prior to any buffered packet data units that were present before the apparatus entered the new cell, said apparatus comprising a transmitter for transmitting the buffered cell change logical link control packet data unit message for informing the wireless packet data network of the cell in which the apparatus is currently located so that packet data intended for the apparatus is not transmitted into the previous cell by the wireless packet data network.
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20. (canceled)
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26. (canceled)
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27. A method comprising:
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passing a cell change logical link control packet data unit message to a radio link control unit for informing a network of the location of a mobile station in a new cell, the cell change logical link control packet data unit message having a flag for indicating a priority of the packet data unit relative to other packet data units; storing the cell change logical link control packet data unit message into a logical link control packet data unit message transmit message queue in accordance with the indicated priority, wherein the cell change logical link control packet data unit message comprises an empty global packet radio service mobility management packet data unit to notify the network to update mobile station location information; and transmitting the stored cell change logical link control packet data unit to a radio channel before any stored packet data units having a lower priority. - View Dependent Claims (28)
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29. A computer readable storing medium embodied with a computer program the execution of which in association with a device cell change operation performs operations of:
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responsive to entering a new cell, generating a cell change logical link control packet data unit message for informing a wireless network of the location of the device, wherein generating includes forming an empty global packet radio service mobility management packet data unit to notify the network to update mobile station location information; and buffering the cell change logical link control packet data unit message into a logical link control packet data unit message transmit queue such that it is transmitted to the network before any already buffered packet data units that were present before the mobile station entered the new cell; and transmitting the buffered cell change packet data unit before any of the buffered packet data units that were present before the mobile station entered the new cell. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. A device, comprising:
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means, responsive to entering a new cell, for generating a cell change logical link control packet data unit message for informing a wireless network of the location of the device, the means for generating being arranged to form an empty general purpose radio service mobility management packet data unit to notify the network to update mobile station location information; and means for buffering the cell change logical link control packet data unit message into a logical link control packet data unit message transmit queue such that it is transmitted to the wireless network before any already buffered packet data units that were present before the mobile station entered the new cell; and means for transmitting the buffered cell change packet data unit before any of the buffered packet data units that were present before the mobile station entered the new cell. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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Specification