MEC Platform GTP-U Downlink Packet TEID Extraction
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Solution Overview
Problem
The Mobile Edge Computing (MEC) platform faces difficulties in correctly performing GTP-U encapsulation when directly replying to uplink packets, resulting in an inability to send corresponding reply packets to the eNodeB in the EPS network architecture.
Innovation Solution
The MEC platform receives a GTP-U uplink packet, obtains the tunneling endpoint identifier (TEID) of the base station device, and sends a GTP-U downlink packet that includes the TEID, enabling correct encapsulation and transmission to the eNodeB.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the MEC platform directly replies to uplink packets without obtaining TEID, then the reply process is simple, but the GTP-U encapsulation cannot be performed correctly and downlink packets cannot be sent to eNodeB
Solution Approach 1:
The MEC platform performs preliminary action by obtaining the TEID of the eNodeB before sending downlink packets. The patent specifies that the MEC platform obtains the TEID through receiving a GTP-U uplink packet from the eNodeB, which contains the TEID in its header. This preliminary acquisition of the TEID enables correct GTP-U encapsulation for subsequent downlink packet transmission, resolving the contradiction between operational simplicity and encapsulation correctness.
2Reliability
If additional devices or servers are deployed to enable correct GTP-U encapsulation, then the encapsulation correctness is improved, but the system complexity and deployment cost increase
Solution Approach 1:
The MEC platform performs self-service by utilizing the TEID information already present in the incoming GTP-U uplink packets from the eNodeB. The patent describes that the MEC platform extracts the TEID from the uplink packet header and reuses it for encapsulating downlink packets, eliminating the need for additional dedicated devices or servers. This self-service approach maintains encapsulation correctness while avoiding increased system complexity.
Solution Approach 2:
The GTP-U uplink packet serves multiple functions: it carries user data from the eNodeB and simultaneously provides the TEID information needed for downlink packet encapsulation. The patent highlights that the same communication interface and packet structure are used for both receiving uplink data and obtaining encapsulation parameters, making the MEC platform multi-functional without requiring additional specialized components.
Data Source
AI summary
Embodiments of the present disclosure provide a GTP-U downlink packet sending method and apparatus. The method includes: receiving, by a MEC platform, a GTP-U uplink packet sent by a base station device; obtaining, by the MEC platform, a TEID of the base station device according to the GTP-U uplink packet; and sending, by the MEC platform, a GTP-U downlink packet to the base station device, where the GTP-U downlink packet includes the TEID of the base station device. By using the technical solutions of the embodiments of the present disclosure, after receiving the GTP-U uplink packet sent by the base station device, the MEC platform can obtain the TEID of the base station device according to the GTP-U uplink packet, and therefore, can correctly perform GTP-U encapsulation, and send the GTP-U downlink packet to the base station device.