Network Initiated Downlink Data Transmission for Static Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As the number of wireless devices increases, the control signaling burden on radio resources and network node processing load also increases, necessitating improvements in wireless communication systems to reduce overhead and processing load, especially for static and nomadic devices that perform frequent small data transmissions.
Innovation Solution
Wireless devices indicate during the attach procedure that they are static or nomadic, allowing context information to be stored after transitioning to idle mode, which is reused for network-initiated downlink data transmissions, simplifying the process and reducing signaling overhead and processing load by avoiding certain signaling messages and security procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network nodes perform full authentication and signaling procedures for each downlink data transmission to idle mode devices, then transmission reliability is ensured, but control signaling overhead and processing load increase significantly
Solution Approach 1:
The network node performs authentication and establishes context information during the initial attach procedure before the device transitions to idle mode. This preliminary action allows subsequent downlink data transmissions to reuse the established context without repeating full authentication procedures, thereby reducing signaling overhead while maintaining reliability
Solution Approach 2:
The network node creates and stores a copy of the device context information (including security credentials and communication parameters) after initial attachment. This copied context is retained and reused for subsequent downlink transmissions to the same device in idle mode, eliminating the need to retransmit full authentication data and reducing control signaling overhead
2Productivity
If context information is stored for static and nomadic devices after attach procedure, then downlink data transmission efficiency improves, but network node memory requirements increase
Solution Approach 1:
The network node implements selective context storage based on device type classification. Context information is stored with higher priority and retention for static and nomadic devices that frequently require downlink transmissions, while mobile devices may have their context cleared after timeout. This localized quality adjustment optimizes memory utilization by allocating storage resources according to actual transmission needs
3Reliability
If full security procedures are executed for each downlink transmission, then security is maintained, but processing load on network nodes increases
Solution Approach 1:
Security context including authentication credentials and encryption parameters is established during the initial attach procedure before the device enters idle mode. This preliminary security setup allows subsequent downlink transmissions to reuse the existing security context without re-executing full authentication and key derivation procedures, thereby maintaining security while reducing processing load
Solution Approach 2:
The network node creates a copy of the security context (including security credentials, encryption keys, and authentication state) after initial attachment and stores it for reuse. When downlink data needs to be transmitted to a device in idle mode, the stored security context copy is retrieved and reused, eliminating the need to reperform computationally intensive security procedures and significantly reducing processing load
Data Source
AI summary
This disclosure relates to techniques for performing network initiated downlink data transmissions with a wireless device in a cellular network. According to some embodiments, a wireless device and a cellular network may perform an attach procedure. As part of the attach procedure, the wireless device may indicate to the cellular network to store context information associated with the wireless device after the attach procedure is completed and the wireless device transitions to idle mode. The wireless device may also store context information. The stored context information may be used in conjunction with a network initiated downlink data transaction between the cellular network and the wireless device.