Downlink message forwarding method and serving gateway (S-GW)

A message forwarding and service gateway technology, applied in network data management, electrical components, wireless communication, etc., can solve problems such as waste of resources, achieve the effects of avoiding waste of resources, reducing the number of forwarding times, and improving transmission efficiency

Active Publication Date: 2010-12-29
江苏金羿智芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides an improved downlink message forwarding method and a serving gateway to solve the problem that the

Method used

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  • Downlink message forwarding method and serving gateway (S-GW)
  • Downlink message forwarding method and serving gateway (S-GW)
  • Downlink message forwarding method and serving gateway (S-GW)

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0052] Example one

[0053] In this embodiment, the target eNB and the source eNB belong to the same MME and S-GW, that is, this embodiment is the S1 handover within the MME and S-GW.

[0054] Figure 4 When performing S1 handover in this embodiment, the S-GW processes the data and signaling flow of the downlink message, as shown in Figure 4 As shown, in this embodiment, when S1 handover occurs, the signaling flow and image 3 Similarity, the difference is that since the source MME and the destination MME are the same, therefore, Figure 4 in image 3 Message 2 and Message 5 are reduced on the basis of.

[0055] Figure 5 In this embodiment, after the source eNB sends the handover command message to the UE, the flow chart of data forwarding is as follows: Figure 5 As shown, the source eNB forwarding data mainly includes the following steps:

[0056] Step 501: S1 handover occurs. After the source eNB sends out the handover command message, it starts to forward the message (the message...

Example Embodiment

[0062] Example two

[0063] In this embodiment, the S1 handover within the MME and across the SGW is taken as an example for description.

[0064] Image 6 This is a schematic diagram of the flow of data flow and signaling flow during S1 handover in this embodiment, such as Image 6 As shown, the signaling flow in this embodiment is Figure 4 Basically, the data flow is from the source eNB to the source S-GW to the target S-GW, and finally to the target eNB.

[0065] Figure 7 In this embodiment, after the source eNB sends the handover command message to the UE, the flow chart for forwarding the data stream is as follows: Figure 7 As shown, in this embodiment, the source S-GW forwarding data mainly includes the following steps:

[0066] Step 701: S1 handover occurs. After the source eNB sends a handover command message, it starts to forward the message to the source S-GW through the reverse transmission tunnel between it and the source S-GW;

[0067] Step 702: After receiving the first...

Example Embodiment

[0072] Example three

[0073] In this embodiment, cross-MME and cross-SGW S1 handover is taken as an example for description.

[0074] Figure 8 This is a schematic diagram of the flow of data flow and signaling flow during S1 handover in this embodiment, as Figure 8 As shown, the signaling flow in this embodiment is image 3 The data flow is basically the same as Image 6 similar.

[0075] Picture 9 In this embodiment, after the source eNB sends the handover command message to the UE, the flow chart for forwarding the data stream is as follows: Picture 9 As shown, in this embodiment, the source S-GW forwarding data mainly includes the following steps:

[0076] Step 901: S1 handover occurs. After the source eNB sends a handover command message, it starts to forward the received message that needs to be sent to the UE to the source S-GW through the reverse transmission tunnel between it and the source S-GW;

[0077] Step 902: After receiving the first packet of the forwarding message ...

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Abstract

The invention discloses a downlink message forwarding method and a serving gateway (S-GW). The method comprises the following steps: in the switching process of user equipment from a source eNB to a target eNB, a source S-GW receives first packet data forwarded by the source eNB through a first back-propagation passage between the source eNB and the source S-GW, then caches a downlink message received from a PDN and prohibits transmitting the downlink message to the source eNB after the source eNB transmits a switching command message to the user equipment and before the user equipment is synchronized with a target cell; and the source S-GW forwards the cached downlink message to a target side through a target-side second back-propagation passage after receiving a message ending identifier transmitted by the source eNB through the first back-propagation passage. The invention can decrease the number of times of message forwarding and improve the transmission rate of the downlink message.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a downlink message forwarding method and a service gateway. Background technique [0002] In the evolved radio access network (Evolved UTRAN, referred to as E-UTRAN), the evolved base station (E-UTRAN NodeB, referred to as eNB) and the mobility management entity (Mobility Management Entity, referred to as MME) of the core network and the service Interfaces between gateways (Serving Gateway, S-GW for short) are as follows: figure 1 As shown, the interface between the MME or S-GW of the core network and the eNB is the S1 interface, and the interface between the eNBs is the X2 interface. During the handover process of User Equipment (UE), data packets can be forwarded through the X2 or S1 interface, and the X2 interface is preferred. When the X2 interface cannot be used to achieve forwarding, the S1 interface is used to forward data. [0003] At present, the 23.401 pr...

Claims

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Application Information

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IPC IPC(8): H04W8/12H04W36/02H04W36/08H04W88/16
CPCH04W36/02H04W36/12
Inventor 蔡威
Owner 江苏金羿智芯科技有限公司
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