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Data transmission method and system of relay station of long-term evolution system

A technology of long-term evolution system and data transmission method, which is applied in the direction of transmission system, electrical components, wireless network protocol, etc., and can solve problems that have not been raised

Active Publication Date: 2010-11-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no solution about how to relay data on the interface between Relay, DeNB and core network, such as interface specification, protocol stack and data packet sending process, etc.

Method used

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  • Data transmission method and system of relay station of long-term evolution system
  • Data transmission method and system of relay station of long-term evolution system
  • Data transmission method and system of relay station of long-term evolution system

Examples

Experimental program
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Embodiment 1

[0104] In this embodiment, the user plane protocol stacks of Relay, DeNB and S-GW are as follows Figure 9shown. The user plane protocol stack on the relay is the radio bearer protocol layer, IP layer, UDP layer, and GTP-U layer from bottom to top, and the user plane protocol stack on the S-GW is the L2 / L1 layer and IP layer from bottom to top. , UDP layer and GTP-U layer, the protocol stack on the DeNB connected to the Relay (also called the wireless side protocol stack) is the wireless bearer protocol layer, and the protocol stack connected to the S-GW (also called the ground side protocol stack) It is the L2 / L1 layer. The radio bearer protocol layers in this paper include PHY layer, MAC layer, RLC layer and PDCP layer from bottom to top, and one or more layers may be added.

[0105] The transmission bearers used to transmit user plane PDUs on the Relay and S-GW are the underlying protocol, IP layer, UDP layer and GTP-U layer from bottom to top. The underlying protocol us...

Embodiment 2

[0112] Such as Figure 11 and Figure 12 As shown, in this embodiment, the user plane protocol stacks and control plane protocol stacks on the Relay, S-GW, and MME are the same as those in Embodiment 1, and the user plane protocol stacks and control plane protocol stacks connected to the Relay on the DeNB are all in The IP layer is added to the radio bearer, and the user plane protocol stack connecting the DeNB to the S-GW and the control plane protocol stack connecting to the MME both add an IP layer on the L2 / L1 layer.

[0113] The DeNB in ​​Embodiment 1 functions as interface routing in the network, that is, forwards data packets on the radio bearer interface and its corresponding L2 / L1 interface. The DeNB in ​​this embodiment also has the function of interface routing, and also has the function of IP router. The DeNB stores an IP routing table locally, and the IP routing relationship in it may be statically configured on the DeNB, or may be determined through negotiation...

Embodiment 3

[0118] Such as Figure 13 As shown, the user plane protocol stack on the Relay is the protocol stack of each protocol layer of the wireless bearer, and the user plane protocol stack on the S-GW is L2 / L1 layer, IP layer, UDP layer and GTP-U layer from bottom to top. , the user plane protocol stack connected to the Relay on the DeNB is the protocol stack of each protocol layer of the wireless bearer, and the user plane protocol stack connected to the S-GW on the DeNB is L2 / L1 layer, IP layer, UDP layer and GTP-U layer.

[0119] In this embodiment, the user plane PDU is used as data transmitted between the Relay and the S-GW, and is carried on the radio bearer between the Relay and the DeNB and on the transmission bearer between the DeNB and the S-GW. The protocol stack of the wireless bearer is respectively PHY layer, MAC layer, RLC layer and PDCP layer from bottom to top, also represented as PHY / MAC / RLC / PDCP, and the protocol stack of the transmission bearer is L2 / L1 layer fro...

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PUM

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Abstract

The invention relates to a data transmission method and a system of a relay station of a long-term evolution system. On a user plane, a relay station sends and receives a user plane PDU by utilizing a radio bearer, an IP layer, a UDP layer and a GTP-U layer, a first network element sends and receives the PDU by utilizing the protocol stacks of an L2 / L1 layer, the IP layer, the UDP layer and the GTP-U layer, and an evolution base station DeNB participating in relaying forwards the data packets generated by the PDU between the relay station and the first network element; and on a control plane, the relay station sends and receives application layer signaling by utilizing the radio bearer, the IP layer and a SCTP layer, a second network element sends and receives the application layer signaling by utilizing the L2 / L1 layer, the IP layer and the SCTP layer, and the DeNB forwards the data packets generated by the application layer signaling between the relay station and the second network element. The invention can realize transmission of data and signaling among the relay station, the evolution base station participating in relaying and other network elements.

Description

technical field [0001] The invention relates to a cellular wireless communication system, in particular to a data transmission method and system for a relay station of the system. Background technique [0002] The cellular wireless communication system includes a terminal, a wireless access network, and a core network. The network composed of a base station or a base station and a base station controller is called a radio access network (Radio Access Network, RAN), which is responsible for access layer affairs, such as the allocation of wireless resources. manage, figure 1 Shown is a structural diagram of a cellular wireless communication system in the prior art, in which only three base stations are shown, that is, base station 1 and base station 2 or base station 3 . The base stations may be connected physically or logically according to actual conditions. Each base station can be connected to one or more core network nodes (CoreNetwork, CN). The core network is respons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W80/06H04L29/06
CPCH04W84/047H04W72/12
Inventor 黄亚达沈晓芹
Owner ZTE CORP