Method and device for transmitting data between GTP-U (GPRS Tunneling Protocol for the User plane) entities in radio connection

A GTP-U, wireless connection technology, applied in the field of wireless communication, can solve the problem of large overhead of wireless resources

Inactive Publication Date: 2011-03-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the application scenario of the relay node, the protocol stack will be applied on the wireless bearer, and the load of the packet header will cause excessive overhead for precious wireless resources.

Method used

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  • Method and device for transmitting data between GTP-U (GPRS Tunneling Protocol for the User plane) entities in radio connection
  • Method and device for transmitting data between GTP-U (GPRS Tunneling Protocol for the User plane) entities in radio connection
  • Method and device for transmitting data between GTP-U (GPRS Tunneling Protocol for the User plane) entities in radio connection

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Embodiment 1

[0086] For important interface protocol stacks in the network architecture corresponding to this embodiment, please refer to the attached Figure 11 and 12 , Figure 11 Indicates the control plane protocol stack, Figure 12 Indicates the user plane protocol stack. In this embodiment, a new Un user plane identifier is used on the Un interface. The Un user plane protocol stack is used to carry UE user data on the Un interface (the interface between the Relay and the DeNB), and the following requirements need to be met:

[0087] The DeNB receives the user data on the S1 interface (the interface between the S-GW and the DeNB), and includes the user data contained in the GTP-U in the Un user plane data and sends it to the Relay (the sending method is based on the protocol stack level, which belongs to the prior art ), after the Relay receives the downlink Un user plane data, it can identify the corresponding relationship with the bearer of the Uu interface (the interface between...

Embodiment 2

[0127] During the bearer establishment process, the GTP-U protocol entities DeNB and Relay allocate a radio interface tunnel identifier respectively, and map their respective local tunnel identifiers, UDP ports and IP addresses with the radio interface tunnel identifier allocated by the opposite end;

[0128] After the bearer is established, when the GTP-U protocol entity DeNB receives the downlink data whose destination address is the terminal, it replaces the GTP-U tunnel ID, UDP port number, and IP address in the downlink data packet header with the wireless interface tunnel ID assigned by Relay , sending the processed downlink data to the Relay, after the Relay receives the downlink data, restores the downlink data packet header with the local tunnel identifier, UDP port and IP address corresponding to the wireless interface tunnel identifier, and sends the restored downlink data to the UE;

[0129] Similarly, when the GTP-U protocol entity Relay receives the uplink data of...

Embodiment 3

[0147] This embodiment replaces the S1 message in Embodiment 2 with a newly added radio interface control plane protocol message (for example, a radio interface tunnel identifier notification message) to allocate uplink and downlink radio interface tunnel identifiers. In this embodiment, the mapping relationship of the protocol header is transmitted through the newly added S1AP signaling, see the attached Figure 16 .

[0148] Step 1601: In the uplink direction, the user triggers the GTP-U protocol entity A to send an initial UE message to the GTP-U protocol entity B, and the message and the information carried therein will trigger the establishment of the GTP-U tunnel for this user;

[0149] Step 1602: The previous status of the user may trigger other non-access stratum steps between the two GTP-U protocol entities at this step, such as authentication;

[0150] Step 1603: Triggered by the bearer establishment process, the GTP-U protocol entities notify the opposite end of th...

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Abstract

The invention discloses a method and a device for transmitting data between GTP-U (GPRS Tunneling Protocol for the User plane) entities in radio connection for saving wireless resources. The method comprises the following steps: a first GTP-U entity and a second GTP-U entity establish radio bearer connection at a radio interference, and the first GTP-U entity and the second GTP-U entity save mapping relationship between GTP-U connection and radio bearer connection in the establishment of the radio bearer connection; and the first GTP-U entity and the second GTP-U entity perform user plane data upstream and downstream transmission according to respectively saved mapping relationship between GTP-U connection and radio bearer connection.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to the realization of a Relay system (wireless relay) in an LTE-A (Long Term Evolution Aavance, Advanced Long Term Evolution) system. Background technique [0002] like figure 1 As shown, the cellular wireless communication system is mainly composed of terminals, access network and core network. A base station or a network composed of a base station and a base station controller is called a radio access network (Radio Access Network, RAN), and is responsible for access layer affairs, such as management of radio resources. There may be physical or logical connections between base stations according to the actual situation, such as figure 1 Base station 1 and base station 2 or base station 3 in . Each base station can be connected to one or more core network nodes (Core Network, CN). The core network is responsible for non-access stratum affairs, such as location updates, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W76/02H04W80/00
CPCH04W80/04H04W76/022H04W76/12
Inventor 奚进朱慧芬黄亚达
Owner ZTE CORP
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