AILC Bit Configuration for Dual-Connected 5G Terminals
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink connection packets and selecting new cells in a wireless communication system, particularly in 5G networks, which affect data transmission and reception efficiency.
Innovation Solution
A method and apparatus for configuring an assistance information bit for local cache (AILC) in a wireless communication system, allowing a terminal to dual-connect to a master base station and a secondary base station, and transmitting PDCP data packets with the AILC bit to determine whether data should be stored in a local cache, enhancing data processing and cell reselection procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal dual-connects to master base station and secondary base station with local cache, then data transmission efficiency is improved, but device complexity and configuration complexity increase
Solution Approach 1:
The patent segments the data transmission path by introducing a local cache at the base station side, separating cached data (which can be quickly retrieved locally) from non-cached data (which requires backhaul transmission). This segmentation allows the system to handle different data types through different paths, improving overall transmission efficiency while maintaining manageable complexity through clear separation of functions.
Solution Approach 2:
The patent implements preliminary action by pre-configuring the AILC bit in PDCP packets before transmission. The network side pre-determines which packets should be cached and marks them accordingly, so that the receiving end can immediately identify and process cached packets without requiring complex real-time analysis, thus improving efficiency while keeping configuration manageable.
2Productivity
If AILC bit is configured in PDCP packet to indicate local cache data, then data processing efficiency is improved, but loss of information increases due to additional signaling
Solution Approach 1:
The patent applies local quality by making the AILC bit configuration specific to individual PDCP packets or packet flows rather than applying a uniform caching policy to all traffic. This allows the system to add signaling overhead only where necessary (for packets that benefit from caching) while leaving other packets unchanged, thus improving processing efficiency for cached packets without unnecessarily increasing overall signaling overhead.
Solution Approach 2:
The patent changes the parameter state of existing PDCP packets by adding or modifying the AILC bit field. Rather than introducing entirely new packet structures or protocols, the solution modifies existing packet parameters to include caching information, thereby improving data processing efficiency while minimizing the increase in signaling overhead by reusing existing packet formats.
3Loss of time
If local cache is used for uplink connection packets, then latency is reduced, but reliability decreases due to cache consistency issues
Solution Approach 1:
The patent implements feedback mechanisms where the network side monitors cache hit/miss ratios and packet transmission outcomes, and uses this information to dynamically adjust caching policies. By providing feedback on cache performance and consistency status, the system can optimize the balance between latency reduction (by caching) and reliability maintenance (by adjusting cache validity and refresh policies based on observed performance).
Solution Approach 2:
The patent introduces dynamic caching policies where the caching behavior is not static but adapts based on network conditions, packet types, and performance metrics. The system can dynamically adjust which packets are cached, for how long, and under what conditions, allowing it to optimize for both low latency and high reliability by making real-time decisions based on current system state rather than following fixed caching rules.
Data Source
AI summary
The present disclosure relates to a method and apparatus for transmitting and receiving data in a wireless communication system. A method, performed by a terminal dual-connected to a master base station and a secondary base station in a wireless communication system, of configuring an assistance information bit for local cache (AILC) bit includes receiving, from the master base station, a radio resource control (RRC) reconfiguration message including AILC bit configuration information (ailc-BitConfig), configuring an AILC bit of a packet data convergence protocol (PDCP) data packet data unit (PDU) based on at least one of a terminating base station of a data radio bearer (DRB) through which the PDCP data PDU is transmitted, whether the PDCP data PDU includes a service data unit (SDU) to be transmitted to a local cache, whether the DRB is configured with evolved universal terrestrial radio access (E-UTRA) PDCP or New Radio (NR) PDCP, or a PDCP sequence number (SN) of the PDCP data PDU, and transmitting, to the terminating base station, the PDCP data PDU in which the AILC bit is configured.