Group Delegate Network Reentry for M2M IRC Collision Avoidance
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Solution Overview
Problem
Conventional network access methods in mobile communication systems often result in conflicts when multiple Mobile Stations (MSs) attempt to access the network simultaneously, leading to unsuccessful access due to the finite number of Initial Reference Codes (IRCs) and the potential for IRC collisions, especially with the rise of Machine to Machine (M2M) technology.
Innovation Solution
The solution involves grouping MSs and assigning a dedicated Group Identifier (ID) to each group, allowing a group delegate MS to send a Group Initial Reference Code (GDC) based on the group ID, which is then used to access the network, reducing conflicts by allocating unique ranging codes and utilizing orthogonal code dynamic partitioning methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple Mobile Stations (MSs) attempt to access the network simultaneously using conventional methods with finite Initial Reference Codes (IRCs), then the network access procedure can be completed, but conflicts and IRC collisions occur leading to unsuccessful access
Solution Approach 1:
The patent segments the network access process by introducing group-based access where MSs are divided into different groups, each with dedicated Group Initial Reference Codes (GIRCs). This segmentation prevents collisions by ensuring that MSs in different groups use different code sets, thereby resolving the contradiction between maintaining reliable access and avoiding IRC collisions.
Solution Approach 2:
The patent applies preliminary action by pre-assigning Group IDs and GIRCs to MSs before they attempt network access. This pre-configuration ensures that when MSs access the network, they already have unique group identifiers and corresponding codes, eliminating the need for random code selection and preventing collisions at the access point.
2Productivity
If the number of Mobile Stations (MSs) accessing the network increases due to Machine to Machine (M2M) technology, then network capacity is utilized, but the possibility of conflict increases and some MSs cannot access the network successfully
Solution Approach 1:
The patent introduces an additional dimension to the code allocation system by adding group-level segmentation on top of individual MS identification. Instead of only using individual IRCs, the system now operates with two dimensions: group identification (GIRCs) and individual identification within groups. This dimensional expansion allows many more MSs to access the network simultaneously without collisions.
3Productivity
If a dedicated ranging code is allocated to a group delegate Mobile Station (MS) and orthogonal code dynamic partitioning methods are used, then conflicts are reduced and network access efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent merges the functions of code allocation and group management into a unified group delegate mechanism. Instead of each MS independently managing its own code allocation, the group delegate MS handles code management for the entire group, simplifying the overall system complexity while maintaining efficient access through coordinated code usage.
Data Source
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AI summary
Provided is a network re-entrymethod and apparatus in a mobile communication system. The network re-entry method includes sending, by a group delegate Mobile Station (MS) among MSs of a group, a ranging code based on a group Identifier (ID) to a Base Station (BS) and receiving, by the MSs, a Ranging-Response (RNG-RSP) message comprising a ranging status for the group from the BS.