LTE eNB Spectrum Reallocation for LSA Reclamation
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Solution Overview
Problem
Current 3GPP LTE standards lack protocols and signaling mechanisms for resource reallocation and bearer modifications in response to dynamic spectrum release, leading to adverse Quality of Service (QoS) impacts on users when Licensed Shared Access (LSA) spectrum is reclaimed by incumbents.
Innovation Solution
The proposed enhancement enables Evolved Node Bs (eNBs) to interface with the Evolved Packet System (EPS) core for optimal resource reallocations and bearer modifications, using a resource reallocation algorithm to redistribute spectrum resources and communicate proposed modifications, thereby minimizing the impact on QoS when LSA spectrum is relinquished.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LSA spectrum is dynamically released to incumbents, then spectrum utilization efficiency is improved, but QoS for existing bearers deteriorates due to resource loss
Solution Approach 1:
The system performs preliminary actions by establishing protocol enhancements and signaling mechanisms before spectrum release occurs. The eNB is prepared with capabilities to detect spectrum release events and initiate resource reallocation procedures, while the core network is pre-configured with protocols to handle bearer modifications, ensuring QoS is maintained proactively rather than reactively
Solution Approach 2:
The invention implements feedback mechanisms where the eNB monitors spectrum availability and continuously reports to the core network. When LSA spectrum is released, the feedback loop triggers automatic resource reallocation algorithms that analyze current bearer requirements and redistribute resources dynamically, allowing the system to adapt and maintain QoS based on real-time conditions
2Reliability
If protocol enhancements are added for resource reallocation, then QoS during spectrum release is improved, but system complexity increases
Solution Approach 1:
The protocol enhancements are designed to be universal and multi-functional, serving multiple purposes within the existing LTE architecture. The same signaling mechanisms handle both normal resource management and spectrum release scenarios, while the resource reallocation algorithms can operate in different modes (gradual vs. immediate release) without requiring separate protocol stacks, thereby limiting complexity growth
Solution Approach 2:
The invention introduces intermediary signaling messages and protocol elements that act as mediators between the eNB and core network. These intermediaries streamline the interaction by providing standardized interfaces for resource reallocation requests and bearer modification proposals, reducing the need for complex point-to-point coordination and simplifying the overall system architecture
3Productivity
If resource reallocation algorithm is implemented, then remaining spectrum resources are optimized, but processing time and computational load increase
Solution Approach 1:
The resource reallocation algorithm implements partial action by focusing computational efforts on the most critical aspects: identifying affected bearers, calculating optimal resource distribution, and executing high-priority reallocations. Rather than performing exhaustive optimization across all parameters, the system achieves sufficient resource optimization through targeted calculations, reducing processing time while maintaining effective spectrum utilization
Solution Approach 2:
The system performs preliminary computations by pre-calculating resource allocation scenarios and maintaining ready-to-execute reallocation plans. When spectrum release is detected, pre-computed resource distribution strategies are immediately applied, avoiding the need for time-consuming real-time calculations and minimizing service disruption
Data Source
AI summary
A proposed 3GPP LTE protocol enhancement disclosed herein, enables an eNB to interface with its network core to achieve optimal resource reallocations and bearer modifications necessary to minimize negative impact on user experience in the events of LSA spectrum reclamation. A method for radio spectrum resource reallocation at an evolved Node B (eNB) comprises acquiring, from an incumbent, Licensed Shared Access (LSA) radio spectrum resource, receiving, from an Operator Administration and Management (OA&M) entity, a directive to relinquish the acquired LSA spectrum resource, performing an analysis of optimal spectrum resource reallocation for determining a proposed reallocation of remaining spectrum resources, communicating, to a network core, the proposed reallocation of remaining spectrum resources, receiving, from the network core, instructions for reallocating the remaining spectrum resources, wherein the instructions are based on the communicated proposal, and reallocating remaining spectrum resources according to the received instructions.