Method and system for retry of packet data calls
View Patent ↗A method and system for retry of a packet data call. The method can include the steps of attempting ( 210 ) an IP registration with a mobile unit ( 110 ) to make a packet data call using a first protocol on a network ( 120 ) that employs both the first protocol and a second protocol for packet data calls and detecting ( 212 ) a failure in the IP registration using the first protocol due to a failure in a data link layer of the first protocol. A physical layer of the first protocol is unaffected by the failure in the data link layer of the first protocol such that communications may still be performed over the physical layer. The method can also include the steps of—at the mobile unit—ceasing ( 214 ) the attempted IP registration using the first protocol on the network and attempting ( 216 ) an IP registration with the mobile unit using the second protocol of the network. As an example, the first protocol can be EVDO, and the second protocol can be 1X.
1. A method for retry of a packet data call, comprising:
After effecting transmission or reception of electronic signals to or from a first protocol:
attempting an Internet Protocol (IP) registration with a mobile unit to make a packet data call using the first protocol on a network that employs both the first protocol and a second protocol for packet data calls;
detecting a failure in the IP registration using the first protocol due to a failure in a data link layer of the first protocol, wherein nevertheless communications remain actively connected to the first protocol;
at the mobile unit, intentionally stopping the attempted IP registration using the first protocol on the network; and
attempting an IP registration with the mobile unit using the second protocol of the network.
2. The method according to claim 1 , wherein the first protocol offers a transmission speed that is higher than that offered by the second protocol.
3. The method according to claim 1 , wherein attempting the IP registration with the mobile unit using the first protocol comprises attempting a mobile IP (MIP) registration with the mobile unit and the network using the first protocol.
4. The method according to claim 3 , wherein attempting the IP registration with the mobile unit using the first protocol further comprises attempting a simple IP (SIP) registration with the mobile unit and the network using the first protocol if the attempted MIP registration is unsuccessful.
5. The method according to claim 1 , wherein attempting the IP registration with the mobile unit using the second protocol further comprises attempting an MIP registration with the mobile unit and the network using the second protocol.
6. The method according to claim 5 , wherein attempting the IP registration with the mobile unit using the second protocol further comprises attempting an SIP registration with the mobile unit and the network using the second protocol if the attempted MIP registration using the second protocol is unsuccessful.
7. The method according to claim 1 , wherein the first protocol is Evolution-Data Optimized (EVDO), and the second protocol is 1X Radio Transmission Technology (1X).
8. A method of re-initiating a packet data call on a network that employs both EVDO and 1×protocols, comprising:
After effecting transmission or reception of electronic signals to or from the EVDO protocol:
attempting an MIP registration through the EVDO protocol with a mobile unit on the network for a packet data call on the mobile unit;
if the MIP registration is unsuccessful, attempting an SIP registration through the EVDO protocol with the mobile unit on the network;
if both the MIP and SIP registrations are unsuccessful, switching the mobile unit to operate in the 1×protocol, wherein the unsuccessful EVDO MIP and SIP registrations are caused by an EVDO data link layer failure, yet an EVDO physical layer remains actively and communicatively connected to the EVDO protocol; and
intentionally stopping MIP and SIP registrations using the EVDO protocol and attempting an MIP registration or an SIP registration with the mobile unit and the network through the 1X protocol for the packet data call on the mobile unit.
9. A mobile unit for making packet data calls using both a first protocol and a second protocol, comprising:
a transceiver that acquires a communication connection with a network using the first protocol; and
a call control module that is coupled to the transceiver, wherein the call control module:
attempts a first IP registration with the network using the first protocol;
detects a failure in a data link layer, although a physical layer of the first protocol remains actively and communicatively connected to the first protocol;
in response to the data link layer failure detection, intentionally stopping the first IP registration and attempts a second IP registration with the network using the second protocol.
10. The mobile unit according to claim 9 , wherein the first protocol is a default choice over the second protocol for transmission of packet data.
11. The mobile unit according to claim 9 , wherein the call control module is operable to attempt the first IP registration with the network using the first protocol by first attempting an MIP registration with the network using the first protocol followed by attempting an SIP registration with the network using the first protocol if the MIP registration is unsuccessful.
12. The mobile unit according to claim 9 , wherein the call control module is operable to attempt the second IP registration with the network using the second protocol by first attempting an MIP registration with the network using the second protocol followed by attempting an SIP registration with the network using the second protocol if the MIP registration is unsuccessful.
13. The mobile unit according to claim 9 , wherein the first protocol is Evolution-Data Optimized (EVDO), and the second protocol is 1X Radio Transmission Technology (1X).