Narrow Bandwidth Device Regions for MTC Coexistence
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Solution Overview
Problem
Current wireless communication systems, optimized for human-oriented communications, often fail to efficiently support machine-type communication (MTC) devices due to their low data rate and low power consumption requirements, as these systems are designed to accommodate wide signal bandwidths, making it difficult for narrow bandwidth MTC devices to operate effectively in legacy networks.
Innovation Solution
The introduction of narrow bandwidth device regions (NBDRs) within wide bandwidth networks allows for the coexistence of narrow bandwidth MTC devices with wide bandwidth devices, using localized transmission of control channels and dynamic resource allocation, enabling efficient operation of MTC devices by dividing the spectrum into multiple NBDRs, which are transparent to wide bandwidth devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wireless network is optimized for wide bandwidth devices to achieve high data rates, then the system capacity for human-oriented communications is improved, but narrow bandwidth MTC devices cannot operate effectively
Solution Approach 1:
The patent segments the wide bandwidth spectrum into multiple narrow bandwidth device regions (NBDRs), each capable of supporting narrow bandwidth MTC devices independently. This segmentation allows the network to simultaneously serve both wide bandwidth devices requiring high data rates and narrow bandwidth MTC devices with low data rate requirements, resolving the contradiction between optimizing for high productivity and maintaining adaptability.
Solution Approach 2:
The patent applies local quality by creating specific regions (NBDRs) within the wide bandwidth spectrum that are optimized for narrow bandwidth device operations. These localized regions have different characteristics from the main wide bandwidth spectrum, allowing narrow bandwidth devices to operate effectively without compromising the overall system performance for wide bandwidth devices.
2Adaptability or versatility
If control channels are transmitted across the full bandwidth to maintain system compatibility, then legacy device support is preserved, but narrow bandwidth devices experience interference and cannot receive control information effectively
Solution Approach 1:
The control channel transmission is segmented into full-bandwidth control channels for legacy devices and localized control channels within NBDRs for narrow bandwidth devices. This segmentation allows both device types to receive appropriate control information without interference, maintaining reliability for narrow bandwidth devices while preserving legacy compatibility.
Solution Approach 2:
Control channels are transmitted with local quality optimization by confining narrow bandwidth device control information to specific frequency regions (NBDRs) rather than distributing it across the full bandwidth. This localized transmission ensures that narrow bandwidth devices can reliably receive control information without being affected by full-bandwidth transmissions intended for legacy devices.
3Productivity
If the network allocates resources dynamically across the entire spectrum to maximize system capacity, then overall network efficiency is improved, but narrow bandwidth devices cannot access sufficient resources
Solution Approach 1:
The patent segments the spectrum into dedicated NBDRs that are reserved for narrow bandwidth MTC devices, ensuring they have guaranteed resource access. Within these segmented regions, dynamic resource allocation is applied to maintain network efficiency. This dual approach ensures both adequate resource quantity for narrow bandwidth devices and overall network productivity.
Solution Approach 2:
The patent introduces a new dimension of resource allocation by creating vertical layers of spectrum usage: the main wide bandwidth spectrum for high-speed devices and overlaying NBDRs for narrow bandwidth devices. This dimensional change allows simultaneous resource allocation to different device types without conflict, maximizing both network efficiency and resource availability for MTC devices.
Data Source
AI summary
Technology for communicating with a narrow bandwidth wireless device in a broadband network is disclosed. One method can include the wireless device retrieving at least one of secondary narrow bandwidth device region (NBDR) configuration information or primary NBDR configuration information from a primary NBDR located in a physical downlink shared channel (PDSCH) region of a subframe. The primary NBDR and the secondary NBDRs can be subsets of frequency resources within a wide bandwidth subframe. The wireless device can receive data in at least one of the primary NBDR and the secondary NBDR based on the configuration information. The primary NBDR can be located in the central part of a signal bandwidth spectrum including direct current (DC) subcarrier. The secondary NBDR can use frequency resources within the subframe not used by the primary NBDR.