Multi-Carrier Paging Carrier Assignment for Wireless Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In multi-carrier systems, the current method of duplicating paging messages across all carriers is inefficient, leading to significant radio resource consumption and potential loss of paging information during handovers or roams, as advanced mobile stations (AMS) may not support all carriers, necessitating costly carrier re-assignment processes.
Innovation Solution
Assigning at least two paging carriers in the same frequency band or super band into a paging group, allowing AMS to locally determine the paging carrier index using a mapping function and mobile identification, thereby reducing the probability of carrier re-assignment and optimizing radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If paging messages are duplicated across all carriers in a paging group, then all AMS can receive paging messages through any carrier, but radio resource consumption increases significantly and paging capacity gain from multi-carrier is not achieved
Solution Approach 1:
The patent segments the paging group into multiple sub-groups, where each sub-group is assigned to a specific carrier. This allows paging messages to be transmitted on only one carrier per sub-group rather than duplicating across all carriers, reducing radio resource consumption while maintaining reliable delivery within each segment.
Solution Approach 2:
The patent applies local quality by assigning different paging sub-groups to different carriers based on local conditions such as carrier frequency bands and base station capabilities. Each carrier handles specific paging sub-groups, optimizing resource usage locally rather than uniformly across the entire system.
2Loss of energy
If an AMS is assigned to receive paging messages on just one carrier, then radio resource overhead is reduced, but the AMS may lose paging information during handover to another cell if it cannot determine the new paging carrier
Solution Approach 1:
The patent performs preliminary action by pre-configuring multiple paging carriers for each AMS based on its mobile identification and the current base station's carrier assignments. When handover occurs, the AMS can quickly determine the new paging carrier using the pre-established mapping relationship, avoiding loss of paging information without requiring full network entry procedures.
Solution Approach 2:
The patent implements feedback mechanisms where base stations exchange information about carrier assignments and paging group configurations. This allows the system to dynamically adjust paging carrier assignments during handover, ensuring the AMS receives paging messages on the correct carrier in the target cell.
3Adaptability or versatility
If an AMS handovers from one base station to another with different carrier assignments, then the AMS may be assigned to a carrier it does not support, but requesting carrier re-assignment consumes system resources and time
Solution Approach 1:
The patent performs preliminary action by pre-configuring multiple paging carriers for each AMS based on its mobile identification and the current base station's carrier assignments. When handover occurs, the AMS can quickly determine the new paging carrier using the pre-established mapping relationship, avoiding loss of paging information without requiring full network entry procedures.
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A carrier assignment method, a multi-carrier base station and a wireless communication device using the same are proposed. The carrier assignment method is adapted for assigning carriers in a paging group for an ABS with multi-carriers, and includes the following step. At least two paging carriers is assigned in a paging group, where all assigned carriers belonging to a paging group are in the same frequency band. Also, small but close frequency bands are grouped into a super band, where different carriers in different super bands are assigned into different paging groups. The wireless communication device determines the paging carrier index for itself by a mapping function of a mobile identification and the number of carriers. The paging message for the wireless communication device is sent only on the paging carrier corresponding to the determined paging carrier index.