Tracking Area Identity Allocation for 5G Paging Signaling Reduction
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Solution Overview
Problem
In 5G user equipment (UE) systems, the large number of bits allocated to user identity during paging leads to long transmission signaling lengths, increasing the load on the network.
Innovation Solution
Allocating unique identity information within a tracking area (TA) to the UE, which is then used to reduce the signaling load by identifying the UE during paging and initial RRC connection establishment, by sending this information through specific messages during attach or location update procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 40-bit S-TMSI is allocated to UE for paging identification, then the UE can be reliably identified during paging, but the transmission signaling length becomes long
Solution Approach 1:
The patent segments the UE identity representation by introducing a shortened identity field (e.g., 5-10 bits) that uniquely identifies the UE within a specific tracking area context, separating the global tracking area identifier from the local UE identifier. This segmentation allows the UE to be identified using fewer bits while maintaining reliability through the combination of TA context and shortened UE identity.
Solution Approach 2:
The patent applies local quality by making the UE identity representation context-dependent. The shortened identity is only valid within a specific tracking area context, allowing the system to use fewer bits for UE identification while maintaining uniqueness through the combination of TA context and local UE identifier, rather than using a long universal identifier everywhere.
2Reliability
If large number of bits are allocated to UE identity during paging, then the UE can be uniquely identified, but the network transmission load increases
Solution Approach 1:
The patent segments the identification system into two parts: a tracking area context (shared among multiple UEs) and a shortened UE-specific identifier (5-10 bits). This segmentation reduces the total number of bits needed for UE identification while maintaining uniqueness, thereby reducing network transmission load without sacrificing identification reliability.
Solution Approach 2:
The patent changes the parameter of identity length from a fixed 40-bit S-TMSI to a variable shortened identity (5-10 bits) that is interpreted within a specific tracking area context. This parameter change allows the system to use fewer bits for transmission while maintaining the ability to uniquely identify UEs, thus reducing network transmission load.
3Adaptability or versatility
If S-TMSI with 40 bits is used in paging messages, then all UEs can be uniquely identified in the network, but the signaling overhead becomes excessive
Solution Approach 1:
The patent segments the identification approach by using a combination of tracking area context and shortened UE identity (5-10 bits) instead of a single long S-TMSI. This segmentation maintains the ability to identify all UEs across the network by combining TA context with local UE identifiers, while significantly reducing the signaling overhead in paging messages.
Solution Approach 2:
The patent uses a simplified copy of the UE identity (shortened to 5-10 bits) that is valid within a specific tracking area context, rather than transmitting the full 40-bit S-TMSI. This copying approach maintains identification capability while reducing the quantity of signaling data transmitted across the network.
Data Source
AI summary
A method for allocating a User Equipment (UE) identity, a network device, a UE and a computer storage medium are provided. The method includes: the network device allocates, based on a Tracking Area (TA) where the UE is located, unique identity information within the TA to the UE; and sends, to the UE, the unique identity information within the TA which is allocated to the UE.