Grouped Terminal STID Allocation for Wireless Network Overload
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Solution Overview
Problem
The existing wireless communication systems face challenges in efficiently managing a large number of M2M terminals due to limitations in the allocation of station identifiers (STID) and cell-radio network temporary identifiers (C-RNTI), leading to network overload and difficulties in supporting massive devices.
Innovation Solution
A method for allocating the same STID or C-RNTI to grouped terminals, allowing for efficient reception and transmission of downlink control channels and bandwidth request channels by providing time domain, frequency domain, and search space information, enabling blind decoding and differentiated resource allocation within the group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the same STID or C-RNTI is allocated to grouped terminals, then the network overload is reduced and resource utilization is improved, but the difficulty of detecting and measuring specific terminals increases
Solution Approach 1:
The patent segments the search space for downlink control channels into multiple regions, where each region is associated with specific terminal groups sharing the same STID or C-RNTI. This segmentation allows the base station to direct control information to specific terminal groups while terminals can identify their designated search space region, resolving the contradiction between resource sharing and terminal identification.
Solution Approach 2:
The patent applies local quality by assigning different search space characteristics (such as different starting positions, sizes, or monitoring configurations) to different terminal groups within the same cell. Each terminal group receives control channels with quality tailored to its specific needs and identification requirements, enabling efficient group management while maintaining individual terminal detectability.
2Difficulty of detecting and measuring
If individual STIDs are allocated to each terminal, then terminal identification is simplified, but the network becomes overloaded with signaling and cannot support massive M2M devices
Solution Approach 1:
The patent merges multiple terminals into groups that share the same STID or C-RNTI, reducing the total number of unique identifiers needed in the network. By combining terminal resources and control channel structures, the system achieves massive device support while maintaining identification capability through group-based search space allocation rather than individual terminal addressing.
Solution Approach 2:
The patent makes the STID or C-RNTI universal by allowing it to serve multiple terminals simultaneously through group-based allocation. The same identifier can function for multiple M2M devices within a terminal group, enabling the network to support massive devices with limited identifier space while maintaining efficient resource utilization.
3Difficulty of detecting and measuring
If control channels are allocated to each terminal individually, then channel detection is easier, but the device complexity and signaling overhead increase significantly
Solution Approach 1:
The patent introduces a new dimension for control channel allocation by organizing search spaces in a multi-dimensional structure that incorporates both terminal group identifiers and channel characteristics. This dimensional organization allows terminals to detect control channels efficiently within their assigned search space while the system manages complexity through structured, hierarchical allocation rather than individual terminal configurations.
Data Source
AI summary
The present invention relates to a method in which a group of terminals receives a downlink control channel, and to a method in which the terminals make requests for bandwidth in a wireless communication system in which the same station identifier (STID) or cell-radio network temporary identifier (C-RNTI) is allocated to the group of terminals. The method, in which a group of terminals to which the same STID or C-RNTI is allocated receive a downlink control channel, comprises the following steps: receiving, from a base station, information on the STID or C-RNTI allocated to the terminals; receiving information on a time domain in which the downlink control channel for the terminals is transmitted, information on a frequency domain, or information on a search space from the base station; and decoding the downlink control channel on the basis of the information on a time domain, the information on a frequency domain, or the information on a search space, and on the basis of the STID or C-RNTI.