Terminal Handover RID Allocation Wireless Communication
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Solution Overview
Problem
Existing wireless communication systems face issues with circuitous data paths and increased transmission delay and bandwidth waste during terminal handovers, primarily due to the fixed anchor point mechanism in the Evolved Packet System (EPS) of the 3GPP, which is exacerbated by the separation of access identifiers and locators in the Transmission Control Protocol/Internet Protocol (TCP/IP) architecture.
Innovation Solution
A method and system for terminal handover in a wireless communication system that allocates a new Routing Identifier (RID) to the terminal when it moves between gateways, updating the Access Identifier (AID)-RID mapping in the Identity Location Register (ILR), and initiating a registration update to maintain seamless communication without a fixed anchor point, thereby reducing data circuitousness and improving mobility performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed anchor point mechanism is used in the EPS system, then terminal mobility management is simplified, but data paths become circuitous and transmission delay increases
Solution Approach 1:
The patent applies the dynamics principle by transitioning from a static fixed anchor point mechanism to a dynamic RID allocation system. The Routing Identifier (RID) is dynamically allocated and updated based on the terminal's current location and network conditions, allowing the system to adapt to mobility requirements without being constrained by a fixed anchor point architecture. This dynamic approach enables more direct data paths while maintaining mobility management functionality.
2Device complexity
If a fixed anchor point mechanism is used, then network architecture is simplified, but bandwidth is wasted due to circuitous data paths
Solution Approach 1:
The patent applies parameter changes by modifying the network identification parameters from fixed anchor point-based addressing to RID-based addressing. The RID parameter is changed to reflect the terminal's current routing location, enabling data packets to be directed through more efficient paths. This parameter transformation allows the system to reduce bandwidth consumption by eliminating circuitous routes while maintaining manageable network architecture through standardized protocol extensions.
3Loss of time
If RID update mechanism is implemented during handover, then data circuitousness is reduced, but information transmission between gateways increases
Solution Approach 1:
The patent applies the extraction principle by separating the RID update function from the complete handover signaling process. Instead of transmitting all handover-related information between gateways, the system extracts and transmits only the essential RID update information. This selective information transmission reduces the data circuitousness effect while minimizing the information overhead between gateways, as only the critical routing identifier changes are propagated rather than complete session contexts.
4Reliability
If traditional handover procedure is used, then protocol compatibility is maintained, but mobility performance deteriorates
Solution Approach 1:
The patent applies universality by designing the RID update mechanism to operate within the existing EPS framework while adding enhanced mobility support. The solution maintains compatibility with standard 3GPP protocols through backward-compatible protocol extensions, allowing legacy and enhanced functionality to coexist. This multi-functional approach enables improved mobility performance through RID-based routing while preserving protocol compatibility through standardized interface designs and message formats that integrate with existing MME, S-GW, and P-GW components.
Data Source
AI summary
A method and system for terminal switching in a wireless communication system are disclosed. A terminal accesses a packet data network through a packet data network gateway, when the terminal switches between gateways, the target gateway to which the terminal switches allocates a new Routing Identifier (RID) to the terminal, and stores a mapping relationship between the Access Identifier (AID) and the new RID of the terminal. The target gateway or the target mobility management entity (MME) of the terminal initiates a registration update request including the new RID of the terminal to the home Identity Location Register (ILR) of the terminal. After receiving the request, the home ILR of the terminal updates the stored AID-RID mapping information of the terminal according to the new RID of the terminal, and initiates a notification for updating the RID of the terminal to the opposite gateway and/or the opposite MME.