ADVANCED LMSD INTERSYSTEM HANDOFF
First Claim
1. An Anchor Mobile Switching Center emulation (MSCe) for supporting an intersystem handoff of a Mobile Station (MS) from an Anchor Network to a Target Network, wherein the MS is in communication with a B-Party, wherein the Anchor Network includes an Anchor Base Station (BS), the Anchor MSCe and an Anchor Media Gateway (MGW), and wherein the Target Network includes a Target BS, a Target MSCe and a Target MGW, the Anchor MSCe comprising:
- a Target MSCe message interface configured to send a Handoff Request message to the Target MSCe, wherein the Handoff Request message further includes a Session Initiation Protocol (SIP) INVITE message that contains a TIA/EIA-41 FacilitiesDirective2 INVOKE message.
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Accused Products
Abstract
An Anchor Mobile Switching Center emulation (MSCe) and a Target MSCe are described herein that take part in an intersystem handoff of a Mobile Station (MS) which is in communication with a B-party. Upon the MS establishing a connection with the Target MSCe, the Anchor MSCe may perform SDP offer/answer exchange between the Target network and the B-Party for the purpose of codec renegotiation to correct a transcoding incompatibility or to enhance the voice bearer path characteristics or to minimize the number of transcodings in the bearer path, between the two parties. The Anchor MSCe and the Target MSCe both support Advanced Legacy Mobile Station Domain (ALMSD) implying that only the SIP transport is used for intersystem handoff communications.
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Citations
26 Claims
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1. An Anchor Mobile Switching Center emulation (MSCe) for supporting an intersystem handoff of a Mobile Station (MS) from an Anchor Network to a Target Network, wherein the MS is in communication with a B-Party, wherein the Anchor Network includes an Anchor Base Station (BS), the Anchor MSCe and an Anchor Media Gateway (MGW), and wherein the Target Network includes a Target BS, a Target MSCe and a Target MGW, the Anchor MSCe comprising:
a Target MSCe message interface configured to send a Handoff Request message to the Target MSCe, wherein the Handoff Request message further includes a Session Initiation Protocol (SIP) INVITE message that contains a TIA/EIA-41 FacilitiesDirective2 INVOKE message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method implemented by an Anchor Mobile Switching Center emulation (MSCe) for supporting an intersystem handoff of a Mobile Station (MS) from an Anchor Network to a Target Network, wherein the MS is in communication with a B-Party, wherein the Anchor Network includes an Anchor Base Station (BS), the Anchor MSCe and an Anchor Media Gateway (MGW), and wherein the Target Network includes a Target BS, a Target MSCe and a Target MGW, the method comprising the step of:
sending a Handoff Request message to the Target MSCe, wherein the Handoff Request message further includes a Session Initiation Protocol (SIP) INVITE message that contains a TIA/EIA-41 FacilitiesDirective2 INVOKE message. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A Target Mobile Switching Center emulation (MSCe) for supporting an intersystem handoff of a Mobile Station (MS) from an Anchor Network to a Target Network, wherein the MS is in communication with a B-Party, wherein the Anchor Network includes an Anchor Base Station (BS), an Anchor MSCe and an Anchor Media Gateway (MGW), and wherein the Target Network includes a Target BS, the Target MSCe and a Target MGW, the Target MSCEe comprising:
an Anchor MSCe message interface configured to receive a Handoff Request message from the Anchor MSCe, wherein the Handoff Request message further includes a Session Initiation Protocol (SIP) INVITE message that contains a TIA/EIA-41 FacilitiesDirective2 INVOKE message. - View Dependent Claims (18, 19, 20, 21)
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22. A method implemented by a Target Mobile Switching Center emulation (MSCe) for supporting an intersystem handoff of a Mobile Station (MS) from an Anchor Network to a Target Network, wherein the MS is in communication with a B-Party, wherein the Anchor Network includes an Anchor Base Station (BS), an Anchor MSCe and an Anchor Media Gateway (MGW), and wherein the Target Network includes a Target BS, the Target MSCe and a Target MGW, the method comprising the step of:
receiving a Handoff Request message from the Anchor MSCe, wherein the Handoff Request message further includes a Session Initiation Protocol (SIP) INVITE message that contains a TIA/EIA-41 FacilitiesDirective2 INVOKE message. - View Dependent Claims (23, 24, 25, 26)
Specification