Msg3 Message RedCap Indication for 5G Access Control
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Solution Overview
Problem
There is a challenge in identifying and managing reduced capability (RedCap) wireless devices in 5G networks, as existing methods lack agreed-upon means to determine if a device should be allowed access to a cell and to understand its capabilities before scheduling data, which is crucial for optimizing resource utilization and ensuring service scalability.
Innovation Solution
The method involves transmitting a Msg3 message that includes an indication of whether the wireless device is a reduced capability device, allowing the network node to decide on access and resource allocation based on this indication, using various information elements such as spare bits, new information elements, MAC Control Elements, or Logical Channel IDs to differentiate RedCap devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RedCap devices are allowed to access the network without early identification, then network access is simplified, but the network cannot optimize resource allocation or enforce access restrictions based on device capabilities
Solution Approach 1:
The patent applies preliminary action by including a RedCap indication in the Msg3 message during the random access procedure. This allows the network to identify RedCap devices early in the access process, before resource allocation decisions are made. The indication is transmitted in advance, enabling the network to prepare appropriate resource allocation strategies and access restrictions beforehand, thus resolving the contradiction between access simplicity and resource allocation efficiency.
2Productivity
If the network implements early identification of RedCap devices, then resource allocation can be optimized, but the signaling overhead and message complexity increase
Solution Approach 1:
The patent merges the RedCap indication with the existing Msg3 message structure of the random access procedure. Instead of creating a separate signaling message or modifying multiple existing messages, the indication is integrated into the Msg3 message that is already part of the standard random access流程. This combining approach enables early RedCap device identification while minimizing additional signaling overhead and maintaining relatively simple message structures.
3Device complexity
If RedCap devices use standard NR procedures without identification, then device complexity is reduced, but the network cannot enforce access restrictions or apply specific scheduling for RedCap use cases
Solution Approach 1:
The patent implements self-service by having the RedCap device automatically include the RedCap indication in its Msg3 message without requiring complex configuration or manual setup. The device autonomously identifies itself as a RedCap device through this indication, enabling the network to subsequently enforce access restrictions and apply specific scheduling policies. This approach maintains low device complexity while providing the network with the flexibility needed for differentiated access control.
Data Source
AI summary
Methods and apparatus are disclosed. In an example, a method performed by a wireless device for performing random access is disclosed. The method comprises transmitting a Msg3 message to a network node, wherein the Msg3 message includes an indication of whether the wireless device is a reduced capability wireless device.