P-GW IP Header Removal for Wireless Data Transmission
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving uplink/downlink data, particularly for terminals with limited mobility that intermittently transmit small-sized data, leading to increased signaling overhead and resource wastage.
Innovation Solution
A method where a packet data network gateway (P-GW) removes and encapsulates Internet Protocol (IP) headers for downlink data and re-encapsulates IP headers for uplink data, optimizing data transmission through identified bearers and group bearers, thereby reducing signaling overhead and conserving network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If IP headers are included in downlink and uplink data transmissions, then data integrity and routing information are preserved, but signaling overhead increases and network resources are wasted
Solution Approach 1:
The patent extracts and removes IP headers from data packets at the P-GW node for downlink transmissions to UEs with limited mobility. The IP header information is preserved through bearer context maintenance, allowing selective removal of redundant headers while keeping essential routing information at the network level.
Solution Approach 2:
The bearer context established in the network serves multiple functions: it stores IP address information, identifies UEs with limited mobility, and enables header removal decisions. This multi-functional context structure allows the system to handle both mobile and non-mobile UEs differently without requiring separate processing mechanisms.
2Productivity
If traditional IP header encapsulation is used for all data transmissions, then routing and delivery reliability are ensured, but signaling overhead increases especially for intermittent small data transmissions
Solution Approach 1:
The patent applies different header handling strategies based on UE mobility characteristics. For UEs with limited mobility, IP headers are removed in downlink and selectively re-encapsulated in uplink. For highly mobile UEs, traditional header encapsulation is maintained. This localized quality adjustment optimizes efficiency for specific UE types without compromising overall system reliability.
Solution Approach 2:
Instead of completely removing IP headers from all packets, the patent applies partial action by removing them only from downlink packets to UEs with limited mobility, and selectively re-encapsulating them in uplink packets when necessary. This partial approach reduces overhead sufficiently while maintaining necessary routing capabilities.
3Loss of energy
If IP headers are removed for downlink data, then signaling overhead is reduced, but the P-GW must maintain additional bearer context information
Solution Approach 1:
The P-GW performs preliminary actions by establishing and maintaining bearer contexts during initial attachment or service request procedures. This pre-established context information includes IP addresses and mobility characteristics, enabling the P-GW to make rapid header removal decisions without real-time complexity when processing downlink data packets.
Data Source
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AI summary
A method for transmitting and receiving data in a wireless communication system, and a device therefor are disclosed. Particularly, a method for transmitting downlink data in a packet data network gateway (P-GW) in a wireless communication system can comprise the steps of: receiving, from an application server, downlink data in which an Internet protocol (IP) header including an IP address of a terminal is encapsulated; removing the IP header from the downlink data; and transmitting, to a serving gateway (S-GW), the downlink data from which the IP header is removed through a bearer identified by the IP address of the terminal, so as to transmit, to the terminal, the downlink data from which the IP header is removed.