Discrete Sub-Band Aggregation for High-Rate Narrowband Communication
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Solution Overview
Problem
Existing discrete narrowband communications systems are limited by narrow spectrum resources, supporting only low-rate services and unable to accommodate high-rate data transmission requirements of applications like power distribution automation and video surveillance.
Innovation Solution
A communication method that aggregates discrete sub-bands in a discrete narrowband communications system by using network devices to send indication information to terminals, allowing them to determine and utilize available sub-bands for data transmission, thereby supporting high-rate data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If single-carrier transmission is used in discrete narrowband communications system, then device complexity is reduced and ease of operation is improved, but data transmission rate is limited and productivity deteriorates
Solution Approach 1:
The available spectrum is divided into multiple discrete sub-bands, each with its own frequency channel number. The network device sends indication information to terminal devices to specify which sub-bands are available for transmission, allowing data to be segmented and transmitted across multiple frequency resources simultaneously, thereby increasing overall data transmission rate while maintaining manageable system complexity through structured resource allocation
Solution Approach 2:
The system transitions from single-carrier transmission to multi-carrier transmission by utilizing multiple discrete sub-bands in the frequency dimension. This dimensional expansion allows simultaneous transmission on multiple frequency channels, dramatically increasing productivity without proportionally increasing device complexity through standardized multi-carrier processing techniques
2Productivity
If narrowband spectrum resources are used, then device complexity is reduced and ease of operation is improved, but spectrum resource utilization is limited and productivity deteriorates
Solution Approach 1:
Multiple discrete sub-bands are aggregated and combined to form a larger effective transmission bandwidth. The network device manages and coordinates these separate sub-bands, merging their capacity to support high-rate data transmission services while maintaining the simplicity of narrowband individual sub-band characteristics, thus resolving the contradiction between resource quantity and productivity
Solution Approach 2:
The discrete narrowband sub-bands are designed to be universally applicable for different services and applications. By providing indication information that can be dynamically configured, the same narrowband infrastructure can support both low-rate and high-rate services, making the system versatile and able to adapt to different productivity requirements without changing the fundamental narrowband architecture
Data Source
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AI summary
A communication method and a communications apparatus are applied to discrete narrowband communication information, to aggregate discrete sub-bands and support high-rate data transmission. In the method, a network device sends first indication information to a terminal, where the first indication information includes a frequency channel number of a start sub-band in all discrete sub-bands of a serving cell of the terminal, a bitmap representing whether each sub-band in a frequency band belongs to the serving cell, and a frequency spacing between sub-bands in the frequency band. The terminal receives the first indication information sent by the network device, and determines frequency channel numbers of all the discrete sub-bands of the cell. The network device sends second indication information to the terminal, where the second indication information is used to indicate a sub-band available to the terminal in all the discrete sub-bands of the cell. The terminal receives the second indication information sent by the network device, determines the sub-band available to the terminal in all the discrete sub-bands of the cell, and further transmits data in the available sub-band. In this way, discrete sub-bands are aggregated to support high-rate data transmission.