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
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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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