Dynamic Uplink Resource Allocation for Ranging Request Messages
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Solution Overview
Problem
In broadband wireless communication systems, the existing ranging procedures are inefficient, leading to prolonged network entry and re-entry times due to inadequate allocation of uplink resources, especially when the size of the Ranging Request (RNG-REQ) message varies, and the system struggles to distinguish between initial network entry and network re-entry scenarios.
Innovation Solution
The method involves a subscriber station requesting additional uplink resources by transmitting a bandwidth request message or dividing the RNG-REQ message into smaller parts, using a bandwidth request header or Piggyback Bandwidth Request Extended Header (PBREH), to ensure sufficient bandwidth for message transmission, and allocating resources using a CDMA_Allocation_IE with specific identifiers to differentiate between network entry and re-entry scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the base station allocates fixed uplink resources for RNG-REQ message transmission, then the resource allocation process is simple, but the allocated bandwidth may be insufficient when the RNG-REQ message size is large
Solution Approach 1:
The patent implements dynamic uplink resource allocation where the base station adjusts the bandwidth allocated for RNG-REQ message transmission based on the actual message size requirements. The system transitions from fixed resource allocation to dynamic allocation, allowing the uplink bandwidth to be adapted according to the specific needs of each ranging request, thereby ensuring sufficient bandwidth while maintaining efficient resource management.
Solution Approach 2:
The patent changes the parameter of uplink bandwidth allocation from a fixed value to a variable that depends on the RNG-REQ message size. The base station monitors the message size and adjusts the allocated bandwidth parameter accordingly, enabling the system to provide adequate resources for large messages while avoiding waste for smaller messages, thus improving network entry speed without excessive complexity.
2Reliability
If the base station allocates large uplink resources to ensure sufficient bandwidth, then the message transmission is reliable, but the resource waste increases when the message size is small
Solution Approach 1:
The patent implements dynamic resource allocation that adjusts uplink bandwidth based on actual message size requirements. Instead of allocating large fixed resources, the system dynamically scales the allocated bandwidth to match the specific needs of each RNG-REQ message, ensuring reliable transmission for large messages while minimizing resource allocation for small messages, thereby reducing overall resource waste.
Solution Approach 2:
The patent changes the bandwidth allocation parameter from a static large value to a dynamic value that varies with message size. The base station modifies the allocated bandwidth parameter according to the actual transmission needs, ensuring sufficient resources for reliable transmission when necessary while avoiding resource waste when the message size is small.
3Adaptability or versatility
If the system uses generic resource allocation for all ranging scenarios, then the allocation process is simple, but the system cannot distinguish between initial network entry and network re-entry scenarios
Solution Approach 1:
The patent applies local quality by implementing different resource allocation strategies for different ranging scenarios. The base station identifies whether a ranging request is for initial network entry or network re-entry and applies scenario-specific allocation rules. This allows the system to differentiate between scenarios and optimize resource allocation for each case without requiring complex identification mechanisms throughout the entire system.
Solution Approach 2:
The patent changes allocation parameters based on the ranging scenario. The base station adjusts uplink bandwidth and resource allocation parameters according to whether the scenario is initial network entry or network re-entry, enabling the system to adapt to different scenarios and provide appropriate resources for each type of ranging operation.
Data Source
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AI summary
A method and an apparatus of requiring uplink resources for transmitting a ranging request message in a communication system are provided. The method includes allocating an uplink bandwidth from a base station, and fragmentizing a Ranging Request (RNG-REQ) message into plural fragmented RNG-REQ messages, when the allocated bandwidth does not accommodate an entire RNG-REQ message, requesting an additional uplink bandwidth by transmitting one fragmented RNG-REQ message, and allocating an requested additional uplink bandwidth from the base station and transmitting a next one fragmented RNG-REQ message.