Radio Base Station Cell Off-the-Air Reconnection Control
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Solution Overview
Problem
The existing methods for reconnecting user equipment (UE) in a cell where radio transmission is stopped result in delayed communication services due to the need to re-establish connections from scratch, and they increase system loads by exchanging large amounts of information between radio base stations.
Innovation Solution
A radio base station with a determination unit for stopping cell transmission, a communication unit for communicating with peripheral cells, and a communication control unit that transmits authentication codes and bearer information to establish connections efficiently, allowing for rapid reconnection without starting from scratch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all UE context information (authentication code, bearer information) is transmitted from the radio base station managing the stopped cell to peripheral radio base stations, then reconnection can be enabled for UE in the stopped cell, but system loads increase due to large amount of information exchange between base stations
Solution Approach 1:
The patent extracts only the authentication code from the complete UE context and transmits it to peripheral base stations, while retaining bearer information at the original base station or management apparatus. This selective extraction enables reconnection authentication without transferring the entire UE context, thereby reducing information exchange volume while maintaining reconnection capability.
Solution Approach 2:
The patent introduces a management apparatus as an intermediary that stores bearer information. When reconnection is needed, the peripheral base station authenticates the UE using the authentication code it received, then retrieves bearer information from the management apparatus rather than receiving it directly from the original base station. This intermediary approach reduces direct information exchange between base stations.
2Reliability
If connection re-establishment starts from the beginning when authentication code is not retained, then security is maintained, but connection establishment time increases and communication service is delayed
Solution Approach 1:
The patent performs preliminary action by transmitting the authentication code to peripheral base stations before the UE actually needs to reconnect. This advance preparation allows peripheral base stations to have authentication credentials ready, so when reconnection is needed, they can immediately authenticate the UE without waiting for information exchange, thereby reducing connection establishment time while maintaining security through pre-distributed authentication codes.
Data Source
AI summary
A radio base station (10) of the present invention comprises: a determination unit (101) that determines whether to perform an off-the-air of a cell (11) managed by the local radio base station (10); a communication unit (102) that communicates with the other radio base stations (10) managing peripheral cells and with a communication provider apparatus (20) managing the bearer information of a user terminal (2); and a communication control unit (103). When it is determined that the off-the-air of the cell of the local radio base station (10) is to be performed, the communication control unit (103) transmits, to the other radio base stations (10) managing the peripheral cells, the authentication code of the user terminal (2) existing in the cell of the local radio base station (10). When a reconnection request is received from the user terminal (2), the communication control unit (103) determines, on the basis of authentication codes received from the other radio base stations (10), whether to authenticate the reconnection request. If the reconnection request is to be authenticated, the communication control unit (103) acquires, from the management apparatus (20), the bearer information of the user terminal having transmitted the reconnection request, and establishes, on the basis of the acquired bearer information, a connection with the user terminal having transmitted the reconnection request.