IP Buffer Relocation to RAN Interface for Mobile Multimedia
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Solution Overview
Problem
Conventional IP buffer placement in handheld devices leads to significant delays in wireless communication systems, affecting system throughput and user experience due to channel acquisition delays and inefficient memory management.
Innovation Solution
Relocating the IP buffer from the handset to the radio-access network (RAN) interface and employing a phy-aware encoder to pre-package streaming media data into precisely sized bursts for transmission, allowing for variable data rates and flexible delivery times, thereby reducing acquisition time and improving quality-of-service constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If IP buffer is placed in handheld device, then device can store and manage data locally, but acquisition delay increases significantly
Solution Approach 1:
The IP buffer functionality is extracted from the handheld device and relocated to the radio-access network interface. This removes the time-consuming local buffering process from the device, eliminating the 5-7 second acquisition delay while the network buffer continues to provide necessary data management and storage capabilities.
Solution Approach 2:
A network-side IP buffer acts as an intermediary between the streaming media source and the handheld device. This intermediary pre-packages data into precisely sized bursts before transmission, enabling the device to acquire data immediately without local buffering delays while still maintaining reliable data management through the network buffer.
2Device complexity
If fixed burst size transmission is used, then transmission structure is simplified, but data rate flexibility is reduced
Solution Approach 1:
The transmission system dynamically adjusts burst sizes based on channel conditions and data requirements. The phy-aware encoder at the network interface can vary the amount of data packaged in each burst, allowing flexible data rates while maintaining the overall fixed-burst transmission structure for simplicity.
Solution Approach 2:
The system changes the data rate parameter by adjusting the amount of data packaged into fixed-time bursts. The network-side buffer can control the burst size and timing, enabling variable data rates to be transmitted through the fixed burst structure, thus achieving flexibility without increasing transmission structural complexity.
3Loss of time
If IP buffer is relocated to network interface, then acquisition delay is reduced, but device memory requirements change
Solution Approach 1:
The IP buffer is extracted from the device memory, eliminating the need for large local buffering capacity. This reduces device memory requirements while the network interface assumes the buffering function, achieving faster acquisition times without compromising the system's ability to manage data storage.
Data Source
AI summary
Systems and methodologies are described that facilitate relocating an IP buffer from a conventional location in a user device handset to a radio-access network (RAN) interface in order to reduce acquisition delay in the user device. By performing IP buffering at the transmission side of a forward link transmission, acquisition time can be reduced by approximately 5-7 seconds. Additionally, a physical layer aware encoder can be employed, which has knowledge of transmission constraints associated with, for example, a conventional DVB-H transmission protocol, and can parse streaming media into 1-second segments that can be pre-packaged in a current superframe for display at a subsequent time.