Hybrid Per Flow Station Uplink Resource Allocation
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Solution Overview
Problem
In wireless communications, existing IEEE 802.16 systems face inefficiencies in uplink resource allocation, as the intended information from the base station regarding traffic needs and distribution among active connections is not available to the advanced mobile station, leading to fragmentation and increased control overhead.
Innovation Solution
Implementing a hybrid per flow/connection and per station uplink resource allocation mechanism, where the base station signals intended flow information to the wireless transmit/receive unit, allowing it to prioritize and manage resources more effectively, using mechanisms like masking CRC codes, explicit inclusion in allocation IE, or associating flows with specific allocation mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If per-station uplink resource allocation is used to minimize resource allocation overhead, then control overhead is reduced, but the base station's intended information about traffic needs and distribution among connections cannot be conveyed to the mobile station
Solution Approach 1:
The patent segments the uplink resource allocation by introducing flow-level granularity within per-station allocation. The base station divides the allocated resources into multiple flow-specific portions, each with associated intended flow information. This segmentation allows the mobile station to understand how to distribute transmissions across different connections while maintaining the overall per-station allocation structure, thus preserving information without proportionally increasing overhead.
Solution Approach 2:
The patent adds a new dimension to the resource allocation by introducing flow identification and intended flow information as an additional layer within the existing per-station allocation framework. Instead of simply allocating resources to stations, the system now allocates resources with flow-specific intent, creating a two-dimensional allocation structure (station × flow) that conveys more information without completely redesigning the allocation mechanism.
2Reliability
If per-connection uplink resource allocation is implemented to provide flow-specific control, then synchronization between base station and mobile station improves, but resource allocation overhead increases
Solution Approach 1:
The patent merges per-connection control benefits with per-station allocation efficiency. By combining flow-level intended information with station-level resource grants, the system achieves synchronization advantages of per-connection allocation while maintaining the overhead efficiency of per-station allocation. The mobile station receives consolidated allocation information that covers multiple connections under a single station grant, reducing the number of separate allocation messages needed.
Solution Approach 2:
The patent creates a universal resource allocation mechanism that can serve multiple connections simultaneously while providing flow-specific control. The per-station allocation with intended flow information acts as a multi-functional grant that can be applied across different service flows, eliminating the need for separate allocation procedures for each connection while still maintaining flow-specific synchronization and control.
3Productivity
If aggregate bandwidth request is sent for self-correction in per-station allocation, then uplink resource utilization improves, but fragmentation probability increases and processing load increases
Solution Approach 1:
The patent implements flow-level feedback mechanisms where the mobile station can report bandwidth needs and reception status for specific flows indicated in the intended flow information. This granular feedback allows the base station to make more precise resource allocation decisions, improving resource utilization without requiring aggressive self-correction through aggregate requests. The feedback loop operates at the flow level, enabling targeted adjustments rather than blanket resource requests.
Solution Approach 2:
The base station performs preliminary allocation decisions by incorporating intended flow information into the resource grants before transmission. This advance planning allows the mobile station to pre-organize uplink transmissions according to the indicated flow distribution, reducing the need for reactive self-correction and aggregate bandwidth requests. The preliminary structuring of resource allocation prevents fragmentation by proactively assigning resources to specific flows.
Data Source
AI summary
In an embodiment, a wireless transmit/receive unit (WTRU) may include: at least one antenna; a transceiver operatively coupled to the at least one antenna; and a processor operatively coupled to the transceiver. The at least one antenna is configured to receive a first signal that includes a control message. The transceiver and the processor are configured to recover the control message from the first signal. The control message includes a resource allocation, a group identification and subframe pattern information. The transceiver and the processor are further configured to produce a second signal that includes data associated with group identification. The processor is further configured to have the transceiver and the at least one antenna transmit the second signal in resources assigned by the resource allocation and in subframes derived from the subframe pattern information. The transceiver and the at least one antenna are further configured to transmit the second signal.