Location-Based Random Access Preamble Pooling for Massive Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing unsourced random access (URA) systems are inadequate for supporting very large numbers of devices due to reliance on device identifiers, leading to resource wastage and inefficiencies in massive communication scenarios.
Innovation Solution
The value of transmission features in random access messages is based on the location indicator of the apparatus, reducing the pool size and complexity by associating geographical location with specific pools, allowing for smaller preambles and longer payloads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If preambles are assigned based on device identifiers in 2-step random access, then device identification is enabled, but resource wastage occurs and scalability to massive devices is limited
Solution Approach 1:
The patent extracts the device identifier dependency from the preamble assignment mechanism. Instead of assigning preambles based on device IDs, the system uses device-independent preambles where the identifier information is removed from the preamble selection process, enabling scalable massive device support without resource wastage
Solution Approach 2:
The patent inverts the traditional approach by not using device identifiers to select preambles, but rather using preambles that are independent of device identifiers. The identification function is inverted to be performed through other means (e.g., payload encoding, network-side identification) rather than through preamble assignment
2Adaptability or versatility
If preambles depend on device identifiers, then device-specific access is achieved, but the pool size must be large to support massive devices
Solution Approach 1:
The patent extracts the device identifier dependency from the preamble mechanism, allowing the use of a smaller, device-independent preamble pool. This reduces the complexity of managing large preamble pools while maintaining the ability to support massive numbers of devices through other identification mechanisms
3Adaptability or versatility
If preambles are based on device identifiers, then identification function is fulfilled, but preamble length must be increased to support more devices
Solution Approach 1:
The patent extracts the identification function from the preamble, allowing preambles to be shorter and device-independent. The identifier information is taken out from the preamble and handled through alternative mechanisms, enabling reduced preamble length while maintaining the ability to distinguish between devices
4Adaptability or versatility
If larger preamble pools are used to support more devices, then device capacity increases, but memory requirements and processing complexity increase
Solution Approach 1:
The patent extracts the device identification dependency from the preamble pool, enabling the use of smaller, more manageable preamble pools. This reduces memory requirements and processing complexity while maintaining the ability to support massive numbers of devices through device-independent preamble assignment
Data Source
AI summary
Receiving first mapping information for a plurality of pools for a transmission feature, each of the plurality of pools defining a set of possible values for the transmission feature, the first mapping information associating a location indicator of the apparatus with a particular pool in the plurality of pools; and transmitting, to a network device, a random access message according to a particular value of the transmission feature, wherein the particular value is selected from a particular set of possible values defined by the particular pool, wherein the particular pool is selected from the plurality of pools based on the first mapping information and the location indicator of the apparatus.