Random Access Configuration via Reference Signal Segmentation
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Solution Overview
Problem
Current mobile communication systems face high system resource overhead when a large number of users attempt to access the network, particularly in Machine to Machine (M2M) scenarios, due to the inefficiencies in pre-allocating Physical Random Access Channels (PRACHs) and random access preambles.
Innovation Solution
A method where a first-class node receives reference signals from a second-class node and sends random access configuration information, optimizing the allocation of time-domain and frequency-domain resources to reduce resource overhead by configuring different subsets of reference signals for different users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-allocation of Physical Random Access Channels (PRACHs) and random access preambles is used to ensure system access, then access reliability is improved, but system resource overhead increases
Solution Approach 1:
The patent segments the random access resource configuration into two parts: part one configuration information (sent in step 302) and part two configuration information (sent in step 304). This segmentation allows the network device to first provide basic random access resources and then supplement additional resources based on actual needs, reducing initial resource overhead while maintaining access reliability.
Solution Approach 2:
The patent implements preliminary action by sending part one of the random access resource configuration information in advance (step 302) before the terminal device actually needs to access the network. This allows terminal devices to be pre-configured with basic random access resources, enabling them to perform initial access procedures without waiting for complete resource allocation, thus improving access reliability while reducing the urgency of resource allocation.
2Reliability
If a huge number of PRACHs and random access preambles are allocated to handle large numbers of users, then access reliability is improved, but system resource overhead increases significantly
Solution Approach 1:
The patent implements dynamic resource allocation where the network device can adaptively adjust random access resources based on actual system conditions. Part two configuration information (step 304) allows dynamic supplementation of random access resources when needed, rather than statically allocating huge numbers of PRACHs and preambles in advance. This dynamic approach maintains access reliability for large numbers of users while significantly reducing system resource overhead.
Solution Approach 2:
The patent changes the parameter of resource configuration from static pre-allocation to dynamic multi-stage allocation. By dividing configuration into two parts and sending them at different times based on system conditions, the patent optimizes the balance between access reliability and resource overhead, allowing the system to handle large numbers of users efficiently without excessive resource consumption.
3Speed
If random access resource configuration is sent in advance to all terminal devices, then access speed is improved, but resource waste occurs when not all devices need access
Solution Approach 1:
The patent segments the configuration information into two parts, sending part one in advance (improving access speed for devices that need it) and part two only when actually needed (reducing resource waste). This segmentation allows the system to provide fast access to devices that require it while avoiding unnecessary resource allocation to devices that do not need access.
Solution Approach 2:
The patent changes the configuration delivery parameter from all-or-nothing to conditional multi-stage delivery. Part one configuration is delivered universally in advance to maintain access speed, while part two configuration is delivered conditionally based on actual access needs, thereby reducing resource waste while preserving access performance for devices that require it.
Data Source
AI summary
Methods for sending or receiving random access configuration information, devices for sending or receiving random access configuration information, a first-class node and a second-class node are provided. In the method for sending random access configuration information, a first-class node receives one or more first-class reference signals sent by a second-class node, the second-class node may include a node which sends one or more first-class reference signals belonging to a same first-class reference signal subset in a determined time-domain resource set, a first-class reference signal set may include one or more first-class reference signal subsets and each first-class reference signal subset may include one or more first-class reference signals (S102). The first-class node sends random access configuration information to the second-class node according to the one or more received first-class reference signals (S104).