MAC Entity Packet Filtering for ProSe D2D Communication
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Solution Overview
Problem
Current D2D communication systems face challenges in efficiently transmitting data between multiple user equipment (UEs) using shared resources, particularly in proximity-based services where packet filtering methods are lacking, leading to potential misdelivery of data packets.
Innovation Solution
A method is introduced where a Medium Access Control (MAC) entity in user equipment (UE) configures identifiers and checks the 16 Most Significant Bit (MSB) of a Medium Access Control Protocol Data Unit (MAC PDU) indicator, ensuring that only targeted packets are delivered to the Radio Link Control (RLC) entity by matching the indicator with the UE's identifiers, thereby filtering out unintended packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D communication systems transmit data between multiple UEs using shared resources without packet filtering, then communication efficiency is improved, but packet misdelivery occurs
Solution Approach 1:
The MAC entity pre-configures a list of identifiers (IMSI, TMSI, or RNTI) before receiving MAC PDUs. This preliminary configuration enables the entity to quickly filter incoming packets by comparing their indicators against the pre-stored identifier list, ensuring accurate packet routing while maintaining communication efficiency in D2D systems
2Reliability
If MAC entity checks all identifiers for every incoming MAC PDU, then packet delivery accuracy is improved, but processing complexity increases
Solution Approach 1:
The MAC entity performs a partial check by comparing only the necessary portions of packet indicators against the configured identifier list. This selective filtering approach achieves sufficient packet delivery accuracy without requiring exhaustive comparison of all identifier bits, thereby reducing processing complexity while maintaining reliability
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for performing a Packet filtering for ProSe in a D2D communication system, the method comprising: configuring a plurality of identifiers of the UE; receiving, by a Medium Access Control (MAC) entity, a Medium Access Control Protocol Data Unit (MAC PDU) including an indicator; checking, by the MAC entity, whether the indicator is equal to 16 Most Significant Bit (MSB) of any of identifiers of the UE; and delivering the MAC PDU, to a Radio Link Control (RLC) entity, after successfully decoding the MAC PDU, if the indicator is equal to 16 MSB of any of identifiers of the UE.