Downlink Multiplexing for Simultaneous Persistent and Dynamic Resource Allocation
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Solution Overview
Problem
Current mobile communication systems, such as E-UTRA, are limited in that user devices can only use either dynamically or persistently allocated resources within a Transmission Time Interval (TTI), preventing simultaneous use of both for downlink data reception.
Innovation Solution
A method allowing user devices to utilize both dynamically and persistently allocated resources within the same TTI by generating control data with a predefined bit pattern to differentiate between resource reallocation and new allocations, enabling flexible resource management without altering the existing DL L1/L2 control channel structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If user devices are limited to using either dynamically or persistently allocated resources within a TTI, then resource allocation management is simplified, but resource efficiency and downlink capacity are reduced
Solution Approach 1:
The patent implements dynamic resource allocation by allowing user devices to utilize both persistently allocated resources and dynamically allocated resources within the same TTI. The network can dynamically assign additional resources beyond the persistent allocation through control signaling, enabling flexible resource management that adapts to varying traffic demands while maintaining simplified persistent allocation structures for real-time services
Solution Approach 2:
The patent changes the parameter of resource allocation flexibility by introducing a mechanism where the number of resources allocated to a user device can vary within a TTI. The network controls this through control data that indicates whether to use persistently allocated resources, dynamically allocated resources, or both, thereby optimizing resource efficiency without significantly increasing management complexity
2Reliability
If only persistently allocated resources are used for real-time services, then service quality is maintained, but downlink capacity and resource utilization are limited
Solution Approach 1:
The patent segments resource allocation into two distinct parts: persistently allocated resources dedicated to real-time services with guaranteed quality, and dynamically allocated resources that can be assigned to additional users or services. This segmentation allows the system to maintain service quality for real-time traffic while increasing overall downlink capacity through flexible dynamic resource distribution
Solution Approach 2:
The patent makes resources universal by allowing the same resource pool to serve multiple purposes: persistently allocated resources can be used for real-time services, while the same network infrastructure can dynamically allocate additional resources for non-real-time services or to supplement persistent allocations, thereby maximizing downlink capacity utilization
3Productivity
If dynamic resource allocation is implemented for all services, then resource efficiency increases, but control signaling complexity and energy consumption increase
Solution Approach 1:
The patent employs periodic persistent resource allocation for real-time services, where resources are allocated in regular intervals without requiring continuous control signaling. This periodic structure reduces control signaling complexity and device energy consumption compared to purely dynamic allocation, while still achieving high resource efficiency through the supplementary dynamic resource allocation mechanism
4Productivity
If both dynamically and persistently allocated resources are used simultaneously, then resource efficiency and downlink capacity increase, but device complexity and control processing increase
Solution Approach 1:
The patent applies preliminary action by pre-allocating persistent resources to user devices before data transmission begins. This preliminary allocation establishes a baseline resource set that devices can use without complex control processing, while dynamic resource allocation is only activated when needed, thereby limiting the increase in device complexity and control processing overhead
Data Source
AI summary
A mobile station which communicates with a base station includes a transceiver configured to receive a downlink control channel, and a controller configured to determine whether C-RNTI is included in the downlink control channel. The controller is further configured to determine that resource allocation in the downlink control channel overrides persistent downlink resource allocation for a Transmission Time Interval (TTI) if the C-RNTI is included in the downlink control channel. The transceiver is further configured to receive a Hybrid Automatic Repeat Request (HARQ) transmission by using persistent downlink resources.