Group-Based Network Access Using an Anchor WTRU
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Solution Overview
Problem
In a collaborative group of wireless transmit/receive units (WTRUs), individual handling of network access procedures leads to collisions and additional delays due to contention resolution, affecting the group's overall access efficiency.
Innovation Solution
A wireless transmit/receive unit (WTRU) acts as an anchor to manage group-based network access by transmitting a message to a network device, receiving resource allocation, and distributing these resources to group members based on priorities and constraints, enabling contention-free access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each WTRU handles the random access procedure individually, then each WTRU can access the network independently, but the group experiences collisions and additional delays due to contention resolution
Solution Approach 1:
The patent combines the random access procedures of multiple WTRUs into a single group-based procedure. The anchor WTRU transmits a first message on behalf of the entire group, and the network device responds with a single random access response containing resources for all group members. This merging eliminates multiple individual access attempts and their associated collisions and delays.
Solution Approach 2:
The anchor WTRU acts as an intermediary for the group. It receives group member information from individual WTRUs, formulates a unified random access request, and distributes the network's resource allocation to all group members. This intermediary role consolidates multiple access procedures into one coordinated effort.
2Productivity
If each WTRU handles the random access procedure individually, then the network can process each access separately, but contention resolution causes additional delays
Solution Approach 1:
The patent merges multiple individual random access procedures into a single group-based procedure. The anchor WTRU transmits one first message representing the entire group, and the network device responds with one random access response that allocates resources for all group members simultaneously. This eliminates the need for multiple separate contention resolution processes.
3Loss of time
If group-based random access procedure is implemented, then collisions and delays are reduced, but resource allocation complexity increases
Solution Approach 1:
The anchor WTRU autonomously performs resource allocation within the group without requiring additional network instructions. After receiving the random access response with allocated resources, the anchor WTRU independently determines how to distribute these resources among group members based on their identities and transmission priorities, eliminating the need for complex network-managed allocation protocols.
Solution Approach 2:
The patent segments the resource allocation task between the network device (which provides overall resource allocation) and the anchor WTRU (which performs internal distribution). The network allocates resources for the group, while the anchor segments and distributes these resources to individual group members based on predefined criteria, simplifying the overall system architecture.
Data Source
AI summary
Described herein are systems, methods, and instrumentalities associated with group-based network access such as an initial access to a network by a group of WTRUs. A description of a group-based initial access procedure is provided and messages/signals that may be transmitted or received by a WTRU during the group-based initial access procedure are also described, as well as ways for allocating resources in the group for sending the described messages/signals. The group-based initial access procedure may be performed based on detection of triggering events or conditions, and measurements may be performed to enable the group-based initial access procedure.