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Off-load apparatus, network system, and handover method of multicast traffic

A technology of an unloading device and a network system, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as the inability to achieve continuous viewing and the inability to achieve the inhibition of EPC network traffic growth.

Inactive Publication Date: 2014-02-12
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] As described above, when performing a multicast service to a mobile terminal, the conventional technology cannot realize neither continuous viewing during the movement of the mobile terminal nor suppression of traffic growth in the EPC network

Method used

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  • Off-load apparatus, network system, and handover method of multicast traffic
  • Off-load apparatus, network system, and handover method of multicast traffic
  • Off-load apparatus, network system, and handover method of multicast traffic

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0237]

[0238] Operations from activation of the mobile terminal 105 until IPTV broadcast viewing is started will be described.

[0239] [Operation 1-1]

[0240] exist Figure 6 In the sequence shown, when the mobile terminal 105 (UE#x) is activated, additional procedures are performed. In other words, the mobile terminal 105 sends an attach request message as a connection request message to the base station 111 ( Figure 6 , ). This attachment request message is transmitted to MME 121 (MME#1) via base station 111 (eNB#1).

[0241] MME121 sends the create session request message to S-GW (SGW) 122 (S-GW#1) ( Figure 6 , ). MME121 receives the session creation response message from S-GW122 ( Figure 6 , ).

[0242] [Operation 1-2]

[0243] MME 121 receiving the create session response message from S-GW 122 generates an initial context establishment request message ( Figure 14 ) and send it to base station 111 ( Figure 6 , ). The offload GW (oGW) 124 monitors the ...

example 2

[0260]

[0261] will refer to Figure 7A The description based on the sequence of the handover procedure of S1 gives a description of the operation in the case of realizing handover from the handover source base station (source eNB) 111 to the handover destination base station (target eNB) 111 due to the movement of the mobile terminal 105, while Maintain IPTV broadcast on mobile terminal (UE#x).

[0262] [Operation 2-1]

[0263] When the source eNB (#1) 111 starts the S1-based handover due to the movement of the mobile terminal (UE#x) 105, the handover needs message ( Figure 16 ) is sent from the source eNB (#1) to the handover source MME (source MME (#1)) 121 ( Figure 7A , ). switch source offload GW (source oGW(#1)) 124 listen to switch need message ( Figure 7A , ) and execute Figure 30 treatment shown.

[0264] [Operation 2-2]

[0265] Figure 43 is a diagram of an example of takeover of offload condition application state in S1-based handover between offload...

example 3

[0292]

[0293] will refer to Figure 7B The sequence shown gives a description of the operation in the case of realizing handover from the source eNB (#1) 111 to the target eNB (#2) 111 due to the movement of the mobile terminal (UE#x) 105 while keeping the mobile terminal IPTV broadcast on (UE#x)105.

[0294] [Operation 3-1]

[0295] When the source eNB (#1) 111 starts X2-based handover due to the movement of the mobile terminal (UE#x) 105, it sends the X2AP: Handover Request message ( Figure 21 ) from source eNB (#1) 111 to target eNB (#2) 111 ( Figure 7B , ). The source oGW (#1) 124 listens to the X2AP: Handover Request message ( Figure 7B , ), and execute Figure 35 treatment shown.

[0296] [Operation 3-2]

[0297] Figure 49 is a diagram of an example of takeover of offload condition application state in X2-based handover between offload GWs. because Figure 35 The process shown, so the source oGW (#1) 124 determines the eNB UE identifier (X2AP) carrying ...

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Abstract

The invention relates to an off-load apparatus, a network system, and a handover method of multicast traffic. The off-load apparatus is disposed between a core network accommodating base stations and the base stations capable of connection with a mobile station. The off-load apparatus includes a storage unit that stores line information and multicast viewing information of the mobile station when the mobile station performs multicast communication of an off-load object via the off-load apparatus; a transferring unit that transfers the line information and the multicast viewing information of the mobile station to another off-load apparatus that is an handover destination when the mobile station moves during the multicast communication; and a control unit that executes a process of participating in multicast viewing on behalf of the mobile station when the off-load apparatus acts as a handover-destination apparatus, based on the multicast viewing information transferred from a handover-source off-load apparatus.

Description

technical field [0001] Embodiments discussed herein relate to off-loading devices, network systems and handover methods of multicast traffic for enabling freely moving mobile stations to view multicast delivered content. Background technique [0002] The 3rd Generation Partnership Project (3GPP) standardizes the Long Term Evolution / Evolved Packet Core (LTE / EPC) as a next-generation mobile communication system following the 3rd Generation Mobile Phone Network (3G Mobile System). LTE / EPC includes LTE network (an LTE-compliant radio access network called Evolved Telecommunications Terrestrial Radio Access Network (eUTRAN)) and EPC network as a core network (also called System Architecture Evolution (SAE)). The EPC network is connected to an Internet Protocol (IP) network (packet network) through an IP Multimedia Subsystem (IMS) network. An IP network is, for example, an Internet Service Provider (ISP) network (Internet) or an Intranet. [0003] A mobile station (mobile termin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/6405
CPCH04N21/25841H04N21/6131H04N21/6405H04W88/16H04L12/189H04W36/16H04W36/12H04W36/0007
Inventor 前原诚志加古镇治
Owner FUJITSU LTD