Packet-based conversational service for a multimedia session in a mobile communications system
First Claim
1. A method for establishing a session involving a mobile radio terminal configured to access a packet-based access network via a radio access network, comprising:
- establishing a first bearer with an interactive quality of service extending between the mobile terminal and the packet-based access network;
using the first bearer to initiate a session that includes a packet-based voice communication and to carry one or more session messages for implementing a packet-based voice service;
establishing a second bearer with a conversational quality of service for the session extending between the mobile terminal and the packet-based access network and carrying voice packets associated with the packet-based voice service; and
using the first bearer with the interactive quality of service to carry control messages associated with the packet-based voice service,wherein the first and second bearers are radio access bearers (RABs) and the method further comprises;
establishing a first Packet Data Protocol (PDP) context for session messages relating to the packet-based voice service and for control messages associated with the voice packets;
mapping the first PDP context onto the first RAB;
establishing a second PDP context for voice packets; and
mapping the second PDP context onto the second RAB.
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Abstract
An important objective for third generation mobile communications systems is to provide IP services, and a very important part of these services will be the conversational voice. The conversational voice service includes three distinct information flows: session control, the voice media, and the media control messages. In a preferred embodiment, based on the specific characteristics for each information flow, each information flow is allocated its own bearer with a Quality of Service (QoS) tailored to its particular characteristics. In a second embodiment, the session control and media control messages are supported with a single bearer with a QoS that suits both types of control messages. Both embodiments provide an IP conversational voice service with increased radio resource efficiency and QoS.
43 Citations
11 Claims
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1. A method for establishing a session involving a mobile radio terminal configured to access a packet-based access network via a radio access network, comprising:
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establishing a first bearer with an interactive quality of service extending between the mobile terminal and the packet-based access network; using the first bearer to initiate a session that includes a packet-based voice communication and to carry one or more session messages for implementing a packet-based voice service; establishing a second bearer with a conversational quality of service for the session extending between the mobile terminal and the packet-based access network and carrying voice packets associated with the packet-based voice service; and using the first bearer with the interactive quality of service to carry control messages associated with the packet-based voice service, wherein the first and second bearers are radio access bearers (RABs) and the method further comprises; establishing a first Packet Data Protocol (PDP) context for session messages relating to the packet-based voice service and for control messages associated with the voice packets; mapping the first PDP context onto the first RAB; establishing a second PDP context for voice packets; and mapping the second PDP context onto the second RAB. - View Dependent Claims (2, 3, 10, 11)
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4. A node for use a mobile communications system that includes in a packet-based access network, comprising electronic circuitry configured to perform the following tasks related to establishing an IP session:
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coordinate with a mobile radio terminal to establish a first bearer with a conversational quality of service extending between the mobile radio terminal and the packet-based access network configured to establish the IP session including a conversational IP service and to carry one or more session messages for implementing the conversational IP service; coordinate with the mobile radio terminal to establish a second bearer with a conversational quality of service for the IP multimedia session extending between the mobile radio terminal and the packet-based access network to carry voice packets associated with the conversational IP service; and coordinate with the packet-based access network node to configure the first bearer with the conversational quality of service to carry control messages associated with the conversational IP service, wherein the bearers are radio access bearers (RABs) and the electronic circuitry is further configured to; establish a first Packet Data Protocol (PDP) context for session messages relating to the packet-based voice service and for control messages associated with the voice packets; map the first PDP context onto the first RAB; establish a second PDP context for voice packets; and map the second PDP context onto the second RAB. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification