Method and apparatus for updating locations of dormant mobile stations
First Claim
1. A method for determining when a location update message is sent from a mobile station (MS) to a base transceiver station (BTS) when the MS is in a dormant state, the method comprising the steps of:
- starting a first timer when the MS enters a dormant state;
starting a second timer when the first timer reaches a predefined value T1;
while the first timer is counting and prior to its reaching said predefined value T1, sending a layer 2 location update message whenever the MS performs an idle handoff indicating that the strongest pilot signal strength has changed from one sector to another sector,while the second timer is counting and prior to its reaching a predefined value T2, sending a layer 2 location update message whenever a further criterion is met; and
after the second timer has reached said predefined value T2, sending no further layer 2 location update messages.
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Abstract
In code division multiple access communication systems, there are three levels for updating locations of dormant mobile stations (MSs) and setting up fast call. In sector and are levels, the dormant MS send a layer 2 message containing a message type and MS identifier to a base transceiver station (BTS). Since the message is associated with the sector where the MS is located, the network is aware of the MS'"'"'s location from the updated location. The dormant MS sends to the BTS a reconnect message containing a message type and an MS identifier. The MS'"'"'s dormant to active state transition is initiated by the MS. In the communication network, sub-packet zone ID is broadcasted in the overhead message. The MS reports its location change on R-CSCH and the network with the BSC level control can page the MS within the zone where the MS sends the report.
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Citations
32 Claims
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1. A method for determining when a location update message is sent from a mobile station (MS) to a base transceiver station (BTS) when the MS is in a dormant state, the method comprising the steps of:
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starting a first timer when the MS enters a dormant state; starting a second timer when the first timer reaches a predefined value T1; while the first timer is counting and prior to its reaching said predefined value T1, sending a layer 2 location update message whenever the MS performs an idle handoff indicating that the strongest pilot signal strength has changed from one sector to another sector, while the second timer is counting and prior to its reaching a predefined value T2, sending a layer 2 location update message whenever a further criterion is met; and after the second timer has reached said predefined value T2, sending no further layer 2 location update messages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for defining the region of a wireless network in which to page a dormant mobile station (MS) when the network determines that data is to be sent to that dormant MS, the method comprising the steps of:
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starting a first timer when the MS enters a dormant state; starting a second timer when the first timer reaches a predefined value T1; while the first timer is counting and prior to its reaching said predefined value T1, sending an MS page to the sector indicated by the most recent layer 2 location update message received from the MS; while the second timer is counting and prior to its reaching a predefined value T2, sending an MS page to the sectors surrounding the sector indicated in the most recently received layer 2 location update message consistent with the further criterion being used to trigger a location update messages being sent from the MS; and after the second timer has reached said predefined value T2, sending an MS page to all network sectors. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A mobile station (MS) for communicating with a base transceiver station (BTS) and a base station controller (BSC) in wireless communication system, the MS in a dormant state sending a location update message, the MS comprising:
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means for starting a first timer when the MS enters a dormant state; means for starting a second timer when the first timer reaches a predefined value T1; means for sending, while the first timer is counting and prior to its reaching said predefined value T1, a layer 2 location update message whenever the MS performs an idle handoff indicating that the strongest pilot signal strength has changed from one sector to another sector; means for sending, while the second timer is counting and prior to its reaching a predefined value T2, a layer 2 location update message whenever a further criterion is met; and means for sending, after the second timer has reached said predefined value T2, no further layer 2 location update messages. - View Dependent Claims (22, 23, 24)
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25. A communication network comprising base station controllers (BSCs) and base transceiver stations (BTSs) that communicate with mobile stations (MSs) in wireless communication system, the network paging a dormant MS when the network determines that data is to be sent to that dormant MS, the MS comprising:
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means for starting a first timer when the MS enters a dormant state; means for starting a second timer when the first timer reaches a predefined value T1; means for sending, while the first timer is counting and prior to its reaching said predefined value T1, a layer 2 location update message whenever the MS performs an idle handoff indicating that the strongest pilot signal strength has changed from one sector to another sector; means for sending, while the second timer is counting and prior to its reaching a predefined value T2, a layer 2 location update message whenever a further criterion is met; and means for sending, after the second timer has reached said predefined value T2, no further layer 2 location update messages, wherein the BTS includes; means for receiving the layer 2 location update message; means for sending a location update acknowledgement message to the MS. - View Dependent Claims (26, 27, 28, 29)
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30. A method for updating locations of mobile stations (MSs) in a dormant state in a wireless communication network wherein a Base Station Controller controls various operating aspects of the network and a Base Transceiver Station provides communication links between MSs and between the MSs and a wireline telephone network, the method comprising the steps of:
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starting a timer when the MS enters a dormant state; while the timer is counting and prior to its reaching a predefined value T1, sending by the MS to the BTS, whenever the MS performs an idle handoff, a message containing information on the location of the MS, the information being associated with the sector of the MS, thereby the network updating the location of the dormant MS at the sector level; when the timer'"'"'s count reaches the value T1, restarting the timer to count until it reaches a predetermined value T2; while the timer is counting and prior to its reaching the predefined value T2, sending by the MS to the BTS a message containing information on the location of the MS, the information being associated with the area of the MS, the area being greater than the sector, thereby the network updating the location of the dormant MS at the area level; when the timer'"'"'s count reaches the value T2, sending no further message of location to the BTS. - View Dependent Claims (31, 32)
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Specification