NAS Header Compression for Radio Resource Efficiency
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Solution Overview
Problem
The increasing number of user equipment (UEs) and the limited resources available to base stations (BS) in wireless communication systems pose challenges in efficiently transmitting and receiving uplink/downlink data and control information, particularly with the introduction of new radio communication technologies and the need for efficient data transmission in high-density communication environments.
Innovation Solution
The method involves compressing headers in user data transmitted from user equipment (UE) to a network node in a non-access stratum (NAS) message, with the network node performing header decompression and providing the result back to the UE, using protocols like robust header compression (RoHC), and includes mechanisms for handling errors in the decompression process to maintain efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If header compression is applied to user data in NAS messages, then the amount of data transmitted over limited radio resources is reduced, but the complexity of the protocol processing increases
Solution Approach 1:
The patent extracts only the essential header information that needs to be transmitted, separating it from the full IP header. By identifying and transmitting only the critical header fields (such as source and destination addresses, port numbers, and protocol identifiers) while omitting redundant information, the solution reduces the amount of data transmitted over radio resources while maintaining protocol processing feasibility.
Solution Approach 2:
The patent applies different levels of compression to different parts of the header based on their importance and variability. Critical fields that change frequently are transmitted in full, while static or predictable fields are compressed or omitted. This localized approach to header compression optimizes the balance between reducing radio resource usage and maintaining processing simplicity.
2Quantity of substance
If the number of user equipment (UEs) served by a base station increases, then the communication system supports more devices, but the limited radio resources become insufficient
Solution Approach 1:
The patent combines multiple small data transmissions into a single NAS message by compressing the headers of multiple IP packets. This merging approach allows the base station to serve more UEs efficiently by reducing the overhead associated with individual packet transmissions, thereby making better use of limited radio resources.
Solution Approach 2:
The patent changes the parameter of header size by applying compression algorithms. By transforming full-sized IP headers into compressed representations, the system can transmit more data with the same radio resources, effectively increasing the capacity to serve a larger number of UEs without proportionally increasing resource consumption.
3Adaptability or versatility
If small amounts of data are transmitted frequently, then the communication system supports diverse applications, but the overhead becomes significant relative to the payload
Solution Approach 1:
The patent performs header compression in advance, before the actual data transmission. By pre-compressing the headers and storing the compressed representations, the system can quickly transmit small amounts of data without incurring the full overhead of uncompressed headers each time. This preliminary compression action significantly improves throughput efficiency for frequent small data transmissions.
Data Source
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AI summary
User data having a compressed header is transmitted as a non-access stratum (NAS) message from a user equipment to a network node. The network node decompresses the compressed header and provides a result of the header decompression to the user equipment.