CN109874138B - Channel measuring method - Google Patents
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- CN109874138B CN109874138B CN201910125561.7A CN201910125561A CN109874138B CN 109874138 B CN109874138 B CN 109874138B CN 201910125561 A CN201910125561 A CN 201910125561A CN 109874138 B CN109874138 B CN 109874138B
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Abstract
The invention discloses a channel measurement method, which is used for channel measurement between a base station and a terminal in a 230M frequency band wireless communication system and comprises the following steps: a base station receives a wireless connection request signaling message reported by a terminal, wherein the wireless connection request signaling message comprises the frequency band supporting capability of the terminal, the minimum frequency domain measurement granularity represented by the number of sub-bands and the minimum channel measurement period; the base station sends a wireless connection establishment signaling message to the terminal, wherein the wireless connection establishment signaling message comprises: the base station distributes channel measurement frequency band information, channel measurement frequency domain granularity represented by the number of sub-bands and a channel measurement period for the terminal; a terminal receives a wireless connection establishment information message sent by a base station and carries out periodic scanning measurement of a channel; and the base station receives the measurement report periodically reported by the terminal and updates the channel quality indication in the measurement report to the base station. The channel measurement method can reduce the difficulty in realizing software and hardware of the terminal and improve the resource utilization rate of the system.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a channel measurement method.
Background
The power system obtains a discontinuous frequency resource usage right amounting to about 7M in a 230M frequency band, and is divided into two sections: 223-229-233 MHz, the bandwidth of a single frequency point is 25KHz, 278 frequency points are summed, the duplex mode is TDD, the maximum transmitting power of the terminal is 30dBm, and the maximum transmitting power of the base station is 44 dBm.
A230M wireless private network communication system formulated by national grid specifications is deeply customized on the basis of a 4G transmission technology, in order to meet the use regulation of 230M frequency band frequency resources, resource mapping, a frame structure, a transmission block and the like of a physical layer are redesigned, a 25KHz working frequency point is regulated to correspond to a sub-band, the width of the sub-carrier is 2KHz (defined by national network LTE-G technical standard) or 3.75KHz (defined by national network IoT-G technical standard), correspondingly, 11 or 6 sub-carriers exist in one sub-band, the uplink and downlink multiple access mode is completely consistent with that of the 4G system, and a mature mechanism above a media control layer in the realization of a 4G protocol stack is largely multiplexed.
The power private network communication system also adopts a scheduling mode to allocate transmission resources, the terminal needs to effectively measure a downlink channel under the control of the base station and report a measurement result to the base station, and after the base station receives the measurement result, the base station flexibly allocates the transmission resources among a plurality of users through scheduling to obtain the gain of multi-user diversity, so that the overall data throughput of the system is improved. Therefore, a reasonable and efficient channel measurement mode is designed, which is very important for reducing the difficulty in implementing software and hardware of the terminal and improving the resource utilization rate of the system.
In the process of implementing the present invention, the inventor finds that the existing 230M wireless private network technical standard specifies the subcarriers and OFDM symbols occupied by the cell reference signal on each subband, that is: the mapping rule of the time domain and frequency domain resources also specifies the signaling flow for starting and stopping channel measurement between the terminal and the base station, but does not specify the mode and granularity of the terminal channel measurement. At present, the frequency domain width of subcarriers and subbands defined by a wireless power private network is narrow, and the total number of the subbands is 278, so that the software and hardware processing capacity required by the terminal for one-time complete channel measurement is high, and the overall cost is high.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a channel measurement method which is applied to a channel measurement process of a 230M wireless private network communication system and can reduce the difficulty in realizing software and hardware of a terminal and improve the resource utilization rate of the system.
In order to achieve the above object, the present invention provides a channel measurement method for channel measurement between a base station and a terminal in a 230M band wireless communication system, the channel measurement method comprising: the base station receives a wireless connection request signaling message reported by the terminal, wherein the wireless connection request signaling message comprises the frequency band supporting capability of the terminal, the minimum frequency domain measurement granularity represented by the number of sub-bands and the minimum channel measurement period; the base station sends a wireless connection establishment signaling message to the terminal, wherein the wireless connection establishment signaling message comprises: the base station distributes channel measurement frequency band information, channel measurement frequency domain granularity represented by the number of sub-bands and a channel measurement period to the terminal; the base station receives a measurement report periodically reported by the terminal, and updates a channel quality indicator in the measurement report to the base station, wherein the measurement report is generated after the terminal receives the wireless connection establishment signaling message and periodically scans and measures the received signal strength of a cell reference signal on a channel measurement frequency band allocated by the base station by using a channel measurement frequency domain granularity in the wireless connection establishment signaling message as a frequency domain unit, and the measurement report comprises channel quality indicator information of each channel measurement frequency domain granularity in the channel measurement frequency band; and the base station receives the measurement report periodically reported by the terminal and updates the measurement report to the base station according to the channel quality indication information in the measurement report.
In a preferred embodiment, the channel measurement frequency band allocated to the terminal by the base station in the radio connection setup signaling message is a subset of all frequency bands supported by the terminal.
In a preferred embodiment, the channel measurement frequency domain granularity in the radio connection setup signaling message is an integer multiple of the minimum frequency domain measurement granularity reported by the terminal.
In a preferred embodiment, a channel measurement period in the radio connection setup signaling message is an integer multiple of the minimum channel measurement period reported by the terminal.
In a preferred embodiment, the channel measurement method further includes: the base station stores an array for the terminal, the number of data in the array is the total number of sub-bands contained in the frequency band supported by the terminal, and each data in the array takes a sub-band number as an index so as to store the channel quality indication information of each sub-band of the terminal received by the base station in a classified manner.
In a preferred embodiment, when the 230M band wireless communication system has a plurality of terminals, the channel measurement method further includes: and the base station performs frequency selective scheduling for each terminal according to the information of the array in which the channel quality indication information is stored.
In a preferred embodiment, the channel measurement method further includes: and the base station sends a wireless resource reconfiguration signaling message to initiate the negotiation of the channel measurement parameters with the terminal.
Compared with the prior art, the channel measurement method provided by the invention is applied to the channel measurement process of a 230M wireless private network communication system, and the terminal reports the supported channel measurement related parameters by combining the self software and hardware realization capability and the requirement of the bearer service, and comprises the following steps: the method supports the frequency band, the measured minimum frequency domain measurement granularity and the minimum channel measurement period, the base station determines the final channel measurement parameters and sends the final channel measurement parameters to the terminal for execution by combining the conditions of self resource allocation and the like after receiving the parameters, and in the process, the channel measurement between the base station and the terminal is more flexible, so that the resource utilization rate of the system is effectively improved. And the frequency resources in the 230M wireless private network communication system are distinguished into only two layers: the granularity of the channel measurement is only based on the sub-band as a unit, and the channel measurement method can greatly reduce the difficulty of realizing software and hardware.
Drawings
Fig. 1 is a flowchart of a channel measurement method according to an embodiment of the present invention;
fig. 2 is a diagram illustrating a periodic scanning measurement of a channel according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
In the channel measurement process of the 230M wireless private network communication system, the realization difficulty of software and hardware of a terminal is reduced, and the resource utilization rate of the system is improved. The inventor also considers that the existing 230M private wireless network technical standard does not specify the mode and granularity of terminal channel measurement, and the existing terminal needs to scan 278 sub-bands for one-time complete channel measurement, and the required software and hardware processing capacity is relatively high. Factors to be considered in determining the reasonable granularity and manner of channel measurements are: the implementation capability of the software and hardware of the terminal, the specific service requirement borne by the terminal, the cost for implementing channel measurement, the expected achievable transmission gain effect, and the like.
In terms of the working frequency band, the working frequency points that can be used by the 230MHz power wireless private network are distributed in two subsections: 223-226MHz and 229-233MHz, for the power private network terminal, only a small part of terminals with large bandwidth transmission requirements need to operate in two sub-bands, and most of terminals with small bandwidth transmission requirements can operate in one sub-band, and for the latter, the range of channel measurement can be narrowed, and the requirement of the terminal on radio frequency hardware is reduced. Therefore, in order to reduce the difficulty of implementing software and hardware of the terminal, it is necessary to perform interactive negotiation between the terminal support capability and the base station radio resource management with respect to the frequency domain measurement granularity.
The period of channel measurement determines how frequently the terminal performs measurement calculation, determines the total time required for the terminal to complete measurement scanning of all channels once, and has direct influence on the software and hardware processing capability of the terminal, so that the period of channel measurement needs to be negotiated between the terminal and the base station.
Due to the constraints of computing resources and signaling transmission overhead, the measurement result of the terminal on the channel, which can be obtained by the base station, is incomplete, and the measurement result of the terminal on each sub-band cannot be obtained, so on the basis of the limited measurement result, how to convert the measurement result to obtain the channel quality indication of the terminal on each sub-band is the key for the base station to realize frequency selective scheduling.
Based on the above thought, the present invention provides a channel measurement method, which can reduce the difficulty of implementing software and hardware of a terminal and improve the resource utilization rate of a system in the channel measurement process of a 230M wireless private network communication system.
Fig. 1 is a channel measurement method according to an embodiment of the present invention, which is used for channel measurement between a base station and a terminal in a 230M-band wireless communication system, and the channel measurement method mainly includes three stages: the method comprises a measurement parameter interaction stage, a terminal measurement execution stage and a base station acquisition terminal channel quality indication. These three stages correspond to the following steps S1 to S2, respectively.
In step S1, the terminal transmits a wireless connection request signaling message to the base station. The radio connection request signaling message includes a frequency band support capability of the terminal, a minimum frequency domain measurement granularity expressed in the number of subbands, and a minimum channel measurement period. Specifically, the set values of the three parameters cannot exceed the reporting capability of the terminal, that is, the channel measurement frequency band allocated by the base station to the terminal is a subset of all frequency bands supported by the terminal. The granularity of the channel measurement frequency domain is integral multiple of the granularity of the minimum frequency domain measurement reported by the terminal. The channel measurement period is an integral multiple of the minimum channel measurement period reported by the terminal.
In step S2, the base station sends a wireless connection setup signaling message to the terminal according to the received wireless connection request signaling message reported by the terminal. The radio connection setup signaling message includes: the base station allocates channel measurement frequency band information, channel measurement frequency domain granularity represented by the number of sub-bands and a channel measurement period to the terminal.
In step S3, the terminal receives the radio connection setup information message sent by the base station and performs channel periodic scanning measurement: the terminal receives a wireless connection establishment information message sent by the base station, and on a channel measurement frequency band allocated by the base station, the terminal takes the channel measurement frequency domain granularity in the wireless connection establishment signaling message as a frequency domain unit, performs periodic scanning measurement on the received signal strength of a cell reference signal, generates a measurement report and performs periodic reporting, wherein the measurement report comprises channel quality indications of each channel measurement frequency domain granularity in the channel measurement frequency band.
Fig. 2 is a diagram illustrating a periodic scanning measurement of a channel according to an embodiment. In fig. 2, N is the number of subbands corresponding to the frequency domain measurement granularity, the total number of subbands in the operating band is N × M, the terminal completes measurement of channel quality in units of N subbands (a single subband is 25KHz) in the T-th cycle, and performs channel measurement in units of another adjacent N subbands in the T + 1-th cycle. After M periods, the terminal completes one-time channel measurement on the whole working frequency band, and the measured frequency domain granularity is N sub-bands.
In step S4, the base station receives the measurement report periodically reported by the terminal, and updates the measurement report to the base station according to the channel quality indicator in the measurement report. In an embodiment, the base station stores an array for the terminal, the number of data in the array is the total number of subbands included in a frequency band supported by the terminal, and each data in the array takes a subband number as an index so as to store the channel quality indication of each subband of the terminal received by the base station in a classified manner. After receiving the measurement report which is reported periodically and takes a plurality of sub-bands as measurement granularity, the base station updates the channel quality indication value of the terminal on the corresponding sub-band to the corresponding array unit.
In one embodiment, when the 230M band wireless communication system has a plurality of terminals, the channel measurement method further includes: and the base station performs frequency selective scheduling for each terminal according to the information of the array in which the channel quality indication information is stored.
In one embodiment, the channel measurement method further includes: according to the change situation of the service load and the requirement of the wireless resource management, the base station can initiate the renegotiation of the channel measurement parameters between the base station and the terminal by sending the wireless resource reconfiguration signaling message.
In the above embodiment, the two signaling messages of the wireless connection request and the wireless connection establishment refer to part 2 of the 230MHz discrete multi-carrier power wireless communication system: section 11.6.5.4 of LTE-G230 MHz technical Specification. The radio resource reconfiguration signaling refers to part 2 of a 230MHz discrete multi-carrier power wireless communication system: section 11.6.5.4 of LTE-G230 MHz technical Specification.
In summary, the channel measurement method of this embodiment is applied to the channel measurement process of the 230M wireless private network communication system, and the terminal reports the supported channel measurement related parameters in combination with its own software and hardware implementation capability and the requirement of the bearer service, including: the method supports the frequency band, the measured minimum frequency domain measurement granularity and the minimum channel measurement period, the base station determines the final channel measurement parameters and sends the final channel measurement parameters to the terminal for execution by combining the conditions of self resource allocation and the like after receiving the parameters, and in the process, the channel measurement between the base station and the terminal is more flexible, so that the resource utilization rate of the system is effectively improved. And the frequency resources in the 230M wireless private network communication system are distinguished into only two layers: the granularity of the channel measurement is only based on the sub-band as a unit, and the channel measurement method can greatly reduce the difficulty of realizing software and hardware.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (6)
1. A channel measurement method for channel measurement between a base station and a terminal in a 230M-band wireless communication system, the channel measurement method comprising:
the base station receives a wireless connection request signaling message reported by the terminal, wherein the wireless connection request signaling message comprises the frequency band supporting capability of the terminal, the minimum frequency domain measurement granularity represented by the number of sub-bands and the minimum channel measurement period;
the base station sends a wireless connection establishment signaling message to the terminal, wherein the wireless connection establishment signaling message comprises: the base station distributes channel measurement frequency band information, channel measurement frequency domain granularity represented by the number of sub-bands and a channel measurement period to the terminal;
the base station receives a measurement report periodically reported by the terminal and updates channel quality indication information in the measurement report into the base station, wherein the measurement report is generated after the terminal receives the wireless connection establishment signaling message and periodically scans and measures the received signal strength of a cell reference signal on a channel measurement frequency band allocated by the base station by taking the channel measurement frequency domain granularity in the wireless connection establishment signaling message as a frequency domain unit, and the measurement report comprises the channel quality indication information of each channel measurement frequency domain granularity in the channel measurement frequency band;
the base station stores an array for the terminal, the number of data in the array is the total number of sub-bands contained in a frequency band supported by the terminal, and each data in the array takes a sub-band number as an index so as to store channel quality indication information of each sub-band of the terminal received by the base station in a classified manner; and after receiving the measurement report which is reported periodically and takes a plurality of sub-bands as measurement granularity, the base station updates the channel quality indication value of the terminal on the corresponding sub-band to the corresponding array.
2. The channel measuring method of claim 1, wherein the channel measuring frequency band allocated to the terminal by the base station in the radio connection setup signaling message is a subset of all frequency bands supported by the terminal.
3. The channel measuring method of claim 1, wherein the channel measurement frequency domain granularity in the radio connection setup signaling message is an integer multiple of the minimum frequency domain measurement granularity reported by the terminal.
4. The channel measuring method of claim 1, wherein the channel measuring period in the radio connection setup signaling message is an integer multiple of the minimum channel measuring period reported by the terminal.
5. The channel measuring method of claim 1, wherein when the 230M band wireless communication system has a plurality of the terminals, the channel measuring method further comprises:
and the base station performs frequency selective scheduling for each terminal according to the information of the array in which the channel quality indication information is stored.
6. The channel measuring method of claim 1, wherein the channel measuring method further comprises:
and the base station sends a wireless resource reconfiguration signaling message to initiate the negotiation of the channel measurement parameters with the terminal.
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| CN115190470B (en) * | 2021-04-01 | 2024-08-06 | 中国电信股份有限公司 | Communication method, system and base station |
| CN114449570B (en) * | 2022-01-26 | 2023-12-05 | 深圳Tcl新技术有限公司 | Communication domain measuring method, storage medium and wireless communication device |
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| CN101888646A (en) * | 2009-05-12 | 2010-11-17 | 中国移动通信集团公司 | Method and system for acquiring feedback information of channel quality and base station |
| CN105306134A (en) * | 2010-09-08 | 2016-02-03 | 英特尔公司 | Enhanced base station and method for communicating through an enhanced distributed antenna system (eDAS) |
| CN108271211A (en) * | 2016-12-30 | 2018-07-10 | 中国移动通信集团宁夏有限公司 | A kind of data transmission method of D2D communications |
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| WO2015062887A2 (en) * | 2013-10-31 | 2015-05-07 | Sony Corporation | Telecommunications apparatus and methods |
| CN104796939A (en) * | 2014-01-17 | 2015-07-22 | 普天信息技术有限公司 | Base station spectrum sensing method, device, terminal spectrum sensing method and device |
| US10348397B2 (en) * | 2014-10-06 | 2019-07-09 | Lg Electronics Inc. | Method and apparatus for measuring channel in wireless communication system |
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| CN101888646A (en) * | 2009-05-12 | 2010-11-17 | 中国移动通信集团公司 | Method and system for acquiring feedback information of channel quality and base station |
| CN105306134A (en) * | 2010-09-08 | 2016-02-03 | 英特尔公司 | Enhanced base station and method for communicating through an enhanced distributed antenna system (eDAS) |
| CN108271211A (en) * | 2016-12-30 | 2018-07-10 | 中国移动通信集团宁夏有限公司 | A kind of data transmission method of D2D communications |
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