Method for transferring PPP inactivity time in a CDMA2000 network
First Claim
1. A packet data serving node (PDSN) within a PPP network, comprising:
- a bus coupled to a processor for transmitting computer instructions and control signals to and from the processor within the PDSN;
memory coupled to the bus, the memory including computer instructions that define operational logic for causing the PDSN to operate a PPP inactivity timer and to generate at least one Link Control Protocol (LCP) Echo Request signal to a mobile terminal upon expiration of the PPP inactivity timer;
the processor for executing computer instructions wherein the processor retrieves the computer instructions from the memory over the bus and executes the computer instructions to generate a first LCP Echo Request; and
wherein the PDSN further generates and produces a PPP inactivity time remaining timer value for transmission to the mobile terminal wherein the PPP inactivity time remaining timer is value is less than or equal to a sum of the PPP inactivity timer value plus an Echo Reply-Timeout timer value times the sum of Echo Request Retries+1 and wherein the value of the PPP inactivity time remaining timer value is greater than the PPP inactivity timer and further wherein the Echo Request Retries is greater than or equal to zero.
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Accused Products
Abstract
A packet data service node is formed to establish an “always on” connection with a mobile terminal by way of a packet control function card or device with the ability to determine when a mobile terminal no longer requires a previously established point-to-point protocol communication link. Thus, to prevent unnecessary communications after a mobile terminal loses RF, the PDSN transmits a PPP inactivity timer remaining timer to the mobile terminal. The mobile terminal then generates communication s signals to the PDSN after regaining RF based upon an internal counter value initialized with the received PPP inactivity time remaining counter. In the described embodiment, the timer remaining timer value is equal to the inactivity timer summed with a total amount of time expected to be expended (in a worst case situation) soliciting responses from the mobile terminal with pings (e.g., LCP-Echo-Requests).
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Citations
20 Claims
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1. A packet data serving node (PDSN) within a PPP network, comprising:
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a bus coupled to a processor for transmitting computer instructions and control signals to and from the processor within the PDSN;
memory coupled to the bus, the memory including computer instructions that define operational logic for causing the PDSN to operate a PPP inactivity timer and to generate at least one Link Control Protocol (LCP) Echo Request signal to a mobile terminal upon expiration of the PPP inactivity timer;
the processor for executing computer instructions wherein the processor retrieves the computer instructions from the memory over the bus and executes the computer instructions to generate a first LCP Echo Request; and
wherein the PDSN further generates and produces a PPP inactivity time remaining timer value for transmission to the mobile terminal wherein the PPP inactivity time remaining timer is value is less than or equal to a sum of the PPP inactivity timer value plus an Echo Reply-Timeout timer value times the sum of Echo Request Retries+1 and wherein the value of the PPP inactivity time remaining timer value is greater than the PPP inactivity timer and further wherein the Echo Request Retries is greater than or equal to zero. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. PPP communication network circuitry including a wireless communication network portion for establishing “
- always on”
type communication links for transmitting data, the network circuitry comprising;
radio transceiver circuitry for establishing a radio frequency (RF) communication link with a mobile terminal;
an Access Network Controller/Base Station Controller (ANC/BSC) for establishing and controlling the RF communication link, the ANC/BSC coupled to communicate with the radio transceiver circuitry and to transmit and receive communication signals thereto and therefrom, respectively, a packet control function (PCF) network element coupled to the ANC/BSC, the PCF for converting data between an IP protocol and a wireless network protocol; and
a packet data serving node (PDSN) coupled to the PCF, the PDSN for establishing a connection between a packet data network and the PCF, the PDSN including logic to generate a PPP inactivity timer within the PDSN and to generate an LCP Echo Request upon expiration of the PPP inactivity timer, the PDSN further including logic to transmit a PPP inactivity time remaining timer value to the mobile terminal by way of the radio transceiver circuitry. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- always on”
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15. A mobile terminal in a PPP network, comprising:
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front end transceiver circuitry for communicating with a packet data serving node (PDSN) wherein the mobile terminal receives a PPP inactivity time remaining timer value generated and transmitted by the PDSN to the mobile terminal;
wherein the mobile terminal sets an internal countdown timer for internally monitoring the PPP inactivity time remaining timer value, wherein, whenever the mobile terminal loses RF (fails to receive a control channel signal), the mobile terminal determines whether the PPP inactivity time remaining timer value is less than a specified value based upon the internal countdown timer and further determines whether to generate a communication signal to the PDSN upon regaining RF based upon the PPP inactivity time remaining timer value as reflected in the internal countdown timer based upon the internal countdown timer. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification