E-PDCCH Resource Configuration with Dynamic E-CCE Allocation
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Solution Overview
Problem
The capacity of the PDCCH in LTE systems is limited, restricting the number of user equipments that can be scheduled, and the introduction of E-PDCCH leads to inefficiencies and high transmission complexity due to fixed E-CCEs that cannot adapt to changing system and user configurations.
Innovation Solution
Introduce an E-CCE of a second type with a dynamically changing number of REs to accommodate varying system and user configurations, alongside an E-CCE of a first type with a fixed number of REs, allowing for flexible resource allocation and improved transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If E-PDCCH is introduced to increase PDCCH capacity, then the number of simultaneously scheduled user equipments is increased, but transmission complexity becomes too high and transmission efficiency becomes low due to fixed E-CCE structure
Solution Approach 1:
The patent introduces a second type of E-CCE with dynamically changeable number of REs, allowing the E-CCE structure to adapt to varying system configurations and user requirements. This dynamic approach replaces the fixed E-CCE structure, enabling flexible resource allocation that reduces transmission complexity while maintaining the ability to schedule multiple user equipments simultaneously.
Solution Approach 2:
The patent changes the parameter of E-CCE by defining two types: first type with fixed number of REs and second type with dynamically changeable number of REs. This parameter change allows the system to optimize resource allocation based on actual transmission needs, reducing unnecessary complexity while preserving capacity expansion benefits.
2Quantity of substance
If E-PDCCH is introduced to increase PDCCH capacity, then the number of simultaneously scheduled user equipments is increased, but transmission efficiency becomes low due to fixed E-CCE structure
Solution Approach 1:
The dynamic E-CCE structure allows the system to efficiently allocate resources based on actual transmission requirements. By enabling the number of REs in second type E-CCEs to change according to system configuration and user needs, the patent improves transmission efficiency while maintaining expanded user scheduling capacity.
3Reliability
If fixed E-CCE structure is used in E-PDCCH, then system configuration requirements are met, but transmission flexibility is reduced and complexity increases
Solution Approach 1:
The patent maintains reliability by keeping the first type E-CCE with fixed structure for systems requiring strict configuration compliance, while introducing the second type with dynamic RE allocation for scenarios needing flexibility. This dual-type approach allows the system to meet configuration requirements while adapting to varying transmission conditions.
Solution Approach 2:
The patent segments E-CCE into two distinct types with different characteristics. The first type maintains fixed structure for reliability, while the second type provides dynamic adaptation. This segmentation allows the system to leverage both fixed and flexible approaches simultaneously, resolving the contradiction between compliance and adaptability.
4Ease of manufacture
If fixed E-CCE structure is used in E-PDCCH, then implementation is simplified, but resource allocation flexibility is reduced
Solution Approach 1:
The patent divides E-CCE implementation into two segments: first type with fixed structure for simple implementation scenarios, and second type with dynamic RE allocation for flexible resource allocation scenarios. This segmentation allows implementers to choose the appropriate type based on specific system requirements, maintaining simplicity where needed while providing flexibility where required.
Data Source
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AI summary
Embodiments of the present invention provide methods for transmitting and receiving a control channel, a base station, and a user equipment, which relate to the communication field, and can solve a transmission problem of available changing transmission resources caused by introduction of an E-PDCCH. A method for configuring a control channel resource includes: determining, by a base station according to a system configuration and/or user configuration, resource elements REs included in an extended control channel element E-CCE, and transmitting an extended physical downlink control channel E-PDCCH to a user equipment, where the E-PDCCH is carried by the E-CCE; and receiving, by the user equipment, the E-PDCCH, and obtaining the REs included in the E-CCE, and receiving, over the REs included in the E-CCE, the E-PDCCH transmitted by the base station. The embodiments of the present invention are used for configuring and detecting a control channel resource.