Subscriber Station Uplink Bandwidth Management
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Solution Overview
Problem
The existing broadband wireless access (BWA) systems face inefficiencies in utilizing uplink bandwidth, which affects the quality of service (QoS) due to suboptimal allocation and utilization of bandwidth resources, particularly when no voice input is detected.
Innovation Solution
Implementing a method where subscriber stations allocate uplink bandwidth using the UGS algorithm and, when no packets need to be sent, utilize this bandwidth by encapsulating packets from rtPS, nrtPS, or BE algorithms within UGS packets and sending them through the allocated uplink bandwidth, optimizing bandwidth usage by detecting voice input and prioritizing packet transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station allocates uplink bandwidth to each subscriber station according to the UGS algorithm, then the voice transmission quality is guaranteed, but the bandwidth utilization efficiency deteriorates when no voice input is detected
Solution Approach 1:
The UGS algorithm, originally designed exclusively for voice transmission, is extended to handle multiple packet types (voice packets and data packets from rtPS, nrtPS, or BE algorithms). This multi-functional approach allows the same bandwidth allocation mechanism to serve both voice communication and data transmission, thereby improving bandwidth utilization during mute states while maintaining voice quality guarantees.
Solution Approach 2:
The system dynamically changes the packet transmission parameters by detecting voice input states. When voice input is detected, the system transmits voice packets according to the UGS algorithm. When no voice input is detected (mute state), the system changes the packet type to data packets from other algorithms (rtPS, nrtPS, or BE), thereby adapting the bandwidth usage to actual transmission needs and improving overall utilization efficiency.
2Productivity
If the subscriber station sends packets according to rtPS, nrtPS, or BE algorithms when in mute state, then the bandwidth utilization efficiency is improved, but the packet management complexity increases
Solution Approach 1:
The subscriber station pre-detects the voice input state and determines the appropriate packet transmission algorithm before actual packet transmission. By preliminarily identifying whether the device is in voice input mode or mute state, the system can proactively select the appropriate algorithm (UGS for voice, or rtPS/nrtPS/BE for data), thereby simplifying the real-time packet management decision-making process while improving bandwidth utilization.
Solution Approach 2:
The voice detector acts as an intermediary that bridges the gap between different packet transmission algorithms. It monitors the voice input state and triggers the selection of appropriate algorithms, serving as a mediator that coordinates between the UGS algorithm (for voice) and other algorithms (for data), thereby managing the complexity of multi-algorithm packet handling in a systematic way.
3Reliability
If the uplink bandwidth is allocated based on fixed algorithms, then the QoS for specific services is guaranteed, but the adaptability to different transmission scenarios deteriorates
Solution Approach 1:
The system transitions from static, fixed algorithm allocation to dynamic algorithm selection based on real-time voice input detection. The packet transmission algorithm is no longer fixed but dynamically adjusted according to the current transmission scenario (voice input or mute state). This dynamic approach maintains QoS guarantees for voice services while adapting to different transmission scenarios by selecting appropriate algorithms for data transmission during mute states.
Solution Approach 2:
The system ensures continuous useful action by maintaining packet transmission during both voice input and mute states. Instead of idle bandwidth during mute periods, the system continuously transmits data packets using alternative algorithms, thereby eliminating bandwidth waste and ensuring that the allocated uplink bandwidth is continuously utilized for productive purposes while maintaining voice QoS when needed.
Data Source
AI summary
A broadband wireless access system including: a base station that allocates an uplink bandwidth to each connected subscriber station according to at least one algorithm; and at least one subscriber station that when there is no voice information to be sent through the uplink bandwidth allocated from the base station according to an unsolicited grant service (UGS) algorithm, detects another packet based on another algorithm, encapsulates the detected packet, and sends the encapsulated packet in a payload field of a UGS packet to the base station through the uplink bandwidth. Thus, the broadband wireless access system maximizes utilization of the bandwidth allocated according to the UGS algorithm.