Method and apparatus for improving a mobile station cell change operation in the general packet radio system (GPRS)
DC CAFCFirst Claim
1. A method, comprising:
- entering a new cell;
generating a cell change logical link control (“
LLC”
) packet data unit (“
PDU”
) for informing a network of a location of a mobile station in a new cell;
buffering the cell change LLC PDU into a LLC PDU transmit queue such that the cell change LLC PDU is selected for transmission prior to any other buffered packet data units that are present in the LLC PDU transmit queue when the cell change LLC PDU is buffered; and
transmitting the buffered cell change LLC PDU before any of the other buffered packet data units that are present in the LLC PDU transmit queue when the cell change LLC PDU is buffered.
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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.
12 Citations
34 Claims
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1. A method, comprising:
-
entering a new cell; generating a cell change logical link control (“
LLC”
) packet data unit (“
PDU”
) for informing a network of a location of a mobile station in a new cell;buffering the cell change LLC PDU into a LLC PDU transmit queue such that the cell change LLC PDU is selected for transmission prior to any other buffered packet data units that are present in the LLC PDU transmit queue when the cell change LLC PDU is buffered; and transmitting the buffered cell change LLC PDU before any of the other buffered packet data units that are present in the LLC PDU transmit queue when the cell change LLC PDU is buffered. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
- a packet data buffer and a controller that is responsive to changing a location from a previous cell to a new cell in a wireless packet data network for generating a cell change logical link control (“
LLC”
) packet data unit (“
PDU”
) for informing the wireless packet data network of the presence of the apparatus in the new cell and for buffering the cell change LLC PDU into the packet data buffer such that it is selected for transmission prior to any other buffered packet data units that are present in the packet data buffer when the cell change LLC PDU is buffered, said apparatus comprising a transmitter for transmitting the buffered cell change LLC PDU prior to the other buffered packet data units that are present in the packet data buffer when the cell change LLC PDU is buffered 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. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- a packet data buffer and a controller that is responsive to changing a location from a previous cell to a new cell in a wireless packet data network for generating a cell change logical link control (“
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19. A method comprising:
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passing, by a mobile station, a cell change logical link control (“
LLC”
) packet data unit (“
PDU”
) to a radio link control unit for informing a network of a location of the mobile station in a new cell, the cell change LLC PDU having a flag for indicating a priority of the LLC PDU relative to other packet data units;storing, in the mobile station, the cell change LLC PDU into a logical link control packet data unit transmit queue in accordance with the indicated priority, wherein the cell change LLC PDU comprises an empty general packet radio service mobility management packet data unit to notify the network to update mobile station location information; and transmitting the stored cell change LLC PDU to a radio channel before any stored packet data units having a lower priority that are present in the transmit queue when the cell change LLC PDU is buffered into the transmit queue. - View Dependent Claims (20)
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21. A non-transitory computer readable 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 (“
LLC”
) packet data unit (“
PDU”
) for informing a wireless network of the location of the device, wherein generating includes forming an empty general packet radio service mobility management packet data unit to notify the network to update mobile station location information;buffering the cell change LLC PDU into a logical link control packet data unit transmit queue such that it is transmitted to the network before any already buffered packet data units that are present in the logical link control packet data unit transmit queue when the cell change LLC PDU is buffered into the logical link control packet data unit transmit queue; and transmitting the buffered cell change LLC PDU before the buffered packet data units that are present when the cell change LLC PDU is buffered into the logical link control packet data unit transmit queue. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A device, comprising:
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means, responsive to entering a new cell, for generating a cell change logical link control (“
LLC”
) packet data unit (“
PDU”
) for informing a wireless network of a location of the device, the means for generating being arranged to form an empty general packet radio service mobility management packet data unit to notify the network to update mobile station location information;means for buffering the cell change LLC PDU into a logical link control packet data unit transmit queue such that it is transmitted to the wireless network before any already buffered packet data units that are present in the transmit queue before buffering the cell change LLC PDU in the transmit queue; and means for transmitting the buffered cell change LLC PDU before any of the buffered packet data units that were present in the transmit queue before buffering the cell change LLC PDU in the transmit queue. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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Specification