Mobile Station Handover CID Acquisition via Offset Calculation
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Solution Overview
Problem
In communication systems, the process of handover between base stations causes a time delay due to the need for mobile stations to acquire new Connection Identifiers (CIDs) from the target base station, which results in inefficiencies and increased data transmission/reception overhead.
Innovation Solution
The method involves broadcasting a first set value and a second set value by the base station, allowing mobile stations to acquire basic and primary management CIDs by adding an offset value, thereby minimizing the need for direct CID exchange and reducing handover delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the mobile station acquires new CIDs from the target base station during handover through direct message exchange, then the handover process follows the conventional protocol, but this causes time delay and increases data transmission overhead
Solution Approach 1:
The base station pre-generates and stores a CID pool including basic CIDs and primary management CIDs before handover occurs. When handover is triggered, the mobile station can directly acquire these pre-prepared CIDs from the target base station's broadcast information or through simplified signaling, eliminating the need for time-consuming sequential CID assignment messages during the handover execution phase.
Solution Approach 2:
The mobile station is enabled to autonomously determine and acquire its new basic CID and primary management CID by monitoring broadcast information from the target base station or by using predefined rules, without requiring the base station to explicitly assign each CID through separate signaling messages. This self-service mechanism reduces the signaling overhead and accelerates the handover process.
2Reliability
If the base station assigns basic CID and primary management CID separately through individual message exchanges, then each CID is properly assigned, but this increases the number of signaling messages and transmission overhead
Solution Approach 1:
The base station combines the basic CID and primary management CID into a single CID pool structure that is broadcast once to all mobile stations. Instead of sending separate assignment messages for each CID type, the mobile station can acquire both CIDs from this single broadcast information or through one unified assignment message, thereby maintaining reliable CID assignment while significantly reducing signaling overhead.
Solution Approach 2:
The broadcast information structure is designed to serve multiple functions simultaneously: it contains the CID pool that provides both basic CIDs and primary management CIDs, serves as synchronization information, and enables autonomous CID acquisition. This multi-functional design eliminates the need for separate dedicated messages for each CID type.
Data Source
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AI summary
A method and apparatus for transmitting/receiving a connection identification (CID) in a communication system is provided. Upon detecting a need for its handover, a mobile station (MS) transmits a handover request message to a first base station (BS) in communication with the MS. Upon receiving the handover request message, the first BS transmits at least one CID for connection setup to a second BS to which the MS will perform handover, to the MS along with a handover response message in response to the handover request message. The MS receives the CID through the handover response message.