CN105812046B - A kind of realization system and method for satellite mobile communication system heartbeat message - Google Patents

A kind of realization system and method for satellite mobile communication system heartbeat message Download PDF

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CN105812046B
CN105812046B CN201610134961.0A CN201610134961A CN105812046B CN 105812046 B CN105812046 B CN 105812046B CN 201610134961 A CN201610134961 A CN 201610134961A CN 105812046 B CN105812046 B CN 105812046B
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heartbeat message
user machine
user
control center
heartbeat
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CN105812046A (en
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苏映雪
李井源
黄龙
黄新明
周蓉
刘小汇
伍微
刘瀛翔
雍玲
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Hunan Zhongdian Xinghe Electronics Co ltd
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National University of Defense Technology
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/18578Satellite systems for providing broadband data service to individual earth stations
    • H04B7/18597Arrangements for system physical machines management, i.e. for construction, operations control, administration, maintenance
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management

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Abstract

一种卫星移动通信系统心跳消息的实现系统及方法,系统包括地面控制中心和用户机,地面控制中心为用户机配置入站心跳消息对应的控制参数,并根据接收到的心跳消息计算用户地理位置,发射功率调整量,以及更新用户机状态,然后将配置的心跳消息控制参数和/或根据心跳消息计算的用户位置和/或发射功率调整量结果发送给用户机;用户机接收地面控制中心配置的心跳消息控制参数,并根据心跳消息发送单元指示,发送心跳消息。通过用户机发送入站心跳消息,地面控制中心可快速、实时地获得用户位置,发射功率和状态信息;并且在保证一定的功率控制准确度的同时降低心跳信令的开销;同时,由于心跳消息位长很短,有利于增强用户机电池寿命和续航能力。

A system and method for realizing heartbeat messages of a satellite mobile communication system. The system includes a ground control center and a user machine. The ground control center configures the control parameters corresponding to the incoming heartbeat message for the user machine, and calculates the user's geographic location according to the received heartbeat message. , transmit power adjustment, and update the state of the user machine, and then send the configured heartbeat message control parameters and/or user position and/or transmit power adjustment results calculated according to the heartbeat message to the user machine; the user machine receives the configuration of the ground control center heartbeat message control parameters, and send the heartbeat message according to the instruction of the heartbeat message sending unit. By sending the inbound heartbeat message from the user machine, the ground control center can obtain the user's location, transmission power and status information quickly and in real time; and reduce the overhead of heartbeat signaling while ensuring a certain power control accuracy; at the same time, due to the heartbeat message The bit length is very short, which is beneficial to enhance the battery life and battery life of the user machine.

Description

一种卫星移动通信系统心跳消息的实现系统及方法System and method for realizing heartbeat message of satellite mobile communication system

技术领域technical field

本发明涉及卫星移动通信技术领域,更具体而言,涉及卫星移动通信的心跳消息的实现方法。The invention relates to the technical field of satellite mobile communication, and more specifically, to a method for realizing heartbeat messages of satellite mobile communication.

背景技术Background technique

卫星移动通信系统主要由空间段、地面控制中心和用户段组成,空间段由包含若干颗卫星的卫星星座组成,这些卫星(出站转发器、入站转发器)转发由地面中心站发出的出站信号和用户机发出的入站信号。地面控制中心完成用户信号收发测量和信息收发处理,并对整个系统的运行进行管理控制。用户段是指带有卫星信号收发功能的用户机终端,接收来自地面控制中心的数据业务以及控制消息,并根据自身业务需求以及出站的控制信令发送入站消息,实现定位、定时、短报文通信等功能。The satellite mobile communication system is mainly composed of the space segment, the ground control center and the user segment. The space segment is composed of a satellite constellation containing several satellites. These satellites (outbound transponder, inbound transponder) forward Outbound signals and inbound signals from user machines. The ground control center completes user signal transmission and reception measurement and information transmission and reception processing, and manages and controls the operation of the entire system. The user segment refers to the user terminal with the function of sending and receiving satellite signals, which receives data services and control messages from the ground control center, and sends inbound messages according to its own business needs and outbound control signaling to realize positioning, timing, short-term Message communication and other functions.

在卫星通信领域中,用户机的发射功率很重要,功率控制的准确度将影响到以下两方面需求:1.达到服务质量(Quality of Service)所需的足够的每比特发送能量;2.最小化对系统其他用户的干扰以及最大化用户设备电池寿命/续航的要求。为实现这一目的,用户设备发射功率控制必须自适应无线传播信道特征,包括路径损耗,阴影衰落,快速衰落,以及其他用户设备的干扰。In the field of satellite communication, the transmission power of the user machine is very important, and the accuracy of power control will affect the following two requirements: 1. Sufficient per-bit transmission energy required to achieve Quality of Service; 2. Minimum Minimizing interference with other users of the system and maximizing user equipment battery life/range. To achieve this, UE transmit power control must be adaptive to wireless propagation channel characteristics, including path loss, shadow fading, fast fading, and interference from other UEs.

目前通信系统常采用闭环功率控制方法对用户设备发射功率进行控制。上行闭环功率控制方法:闭环功率控制需要网络侧和用户共同完成。闭环功率控制过程存在一个反馈控制环路,网络层设备接收到来自用户设备的平均载噪比(C/N)means,ul,并与要求的载噪比(C/N)threshold,ul进行比较,给出用户设备需要提高或降低发射功率的命令。具体地,若(C/N)means,ul<(C/N)threshold,ul,网络侧向用户设备发送将发射功率增大一个步长值的功率控制命令,用户设备接收到该命令后,将自身的发射功率增大一个步长值;反之,网络侧设备向用户设备发送将发射功率值减少一个步长值的功率控制命令,用户设备接收到该命令后,将自身的发射功率减少一个步长值。网络侧和用户按照这个规律循环往复。At present, a communication system often adopts a closed-loop power control method to control the transmission power of the user equipment. Uplink closed-loop power control method: closed-loop power control needs to be completed jointly by the network side and the user. There is a feedback control loop in the closed-loop power control process. The network layer equipment receives the average carrier-to-noise ratio (C/N) means,ul from the user equipment, and compares it with the required carrier-to-noise ratio (C/N) threshold,ul , giving a command that the user equipment needs to increase or decrease the transmit power. Specifically, if (C/N) means,ul <(C/N) threshold,ul , the network side sends to the user equipment a power control command that increases the transmission power by a step value, and after receiving the command, the user equipment, Increase its own transmit power by a step value; otherwise, the network side device sends a power control command to the user equipment to reduce the transmit power value by a step value, and the user equipment reduces its own transmit power by one step after receiving the command. step value. The network side and the user go back and forth according to this rule.

闭环功率控制能较好地自适应信道变化,但需要用户设备较频繁地发送消息,网络侧设备接收并测量用户设备发送的信号质量后,再将功率调整命令反馈给用户设备,这样才能实时地跟踪上信道的变化,但这一定程度上增加了用户设备的信令开销。Closed-loop power control can better adapt to channel changes, but requires the user equipment to send messages more frequently, and the network side equipment receives and measures the signal quality sent by the user equipment, and then feeds back the power adjustment command to the user equipment, so that real-time Changes in the upper channel are tracked, but this increases the signaling overhead of the user equipment to a certain extent.

另外现役北斗一期RDSS卫星通信系统的入站信号由3部分组成:同步头,勤务段和数据段。其中同步头上调制已知的导频序列,用于中心站对入站信号进行捕获和跟踪;勤务段上调制本次入站消息的控制信令,用于辅助后续数据段的电文解调;数据段承载本次入站信息的具体服务内容,数据段位长可变。由此可见,无论消息类型,每次入站消息都需要携带完整的勤务段。这对于某些需要频繁发送的入站消息而言,其勤务段携带的冗余信息过多,造成用户设备电池寿命/续航能力下降,入站容量下降。In addition, the inbound signal of the active Beidou Phase I RDSS satellite communication system consists of three parts: synchronization header, service segment and data segment. Among them, the known pilot sequence is modulated on the synchronization head, which is used by the central station to capture and track the inbound signal; the control signaling of this inbound message is modulated on the service section, which is used to assist the demodulation of the subsequent data section; The data segment carries the specific service content of this inbound information, and the length of the data segment is variable. It can be seen that, regardless of the message type, each inbound message needs to carry a complete service segment. For some inbound messages that need to be sent frequently, the service segment carries too much redundant information, resulting in a decrease in the battery life/endurance of the user equipment and inbound capacity.

发明内容Contents of the invention

对于卫星通信系统,为了提高入站消息的通信效率以及入站容量,降低非数据业务的信令开销是有必要的。本发明为卫星通信系统提供一种卫星移动通信系统心跳消息的实现系统及方法,地面控制中心根据接收到的心跳消息能实时且快速地实现用户机的闭环功率控制,粗定位和状态监测。For satellite communication systems, in order to improve the communication efficiency and inbound capacity of inbound messages, it is necessary to reduce the signaling overhead of non-data services. The invention provides a system and method for realizing the heartbeat message of the satellite mobile communication system for the satellite communication system. The ground control center can realize the closed-loop power control, rough positioning and state monitoring of the user machine in real time and quickly according to the received heartbeat message.

本发明的技术方案是:Technical scheme of the present invention is:

一种卫星移动通信系统心跳消息的实现系统,其特征在于,包括地面控制中心和用户机,地面控制中心用于为用户机配置入站心跳消息对应的控制参数,并根据接收到的心跳消息计算用户地理位置,发射功率调整量,以及更新用户机状态,然后将配置的心跳消息控制参数和/或根据心跳消息计算的用户位置和/或发射功率调整量结果发送给所述用户机;用户机用于接收地面控制中心配置的心跳消息控制参数,并根据所述心跳消息发送单元指示,发送心跳消息。A system for realizing a heartbeat message of a satellite mobile communication system is characterized in that it includes a ground control center and a user machine, and the ground control center is used to configure the control parameters corresponding to the incoming heartbeat message for the user machine, and calculate according to the received heartbeat message The user's geographic location, the amount of transmission power adjustment, and updating the state of the user machine, and then send the configured heartbeat message control parameters and/or the user position and/or transmission power adjustment results calculated according to the heartbeat message to the user machine; the user machine It is used for receiving the heartbeat message control parameters configured by the ground control center, and sending the heartbeat message according to the instructions of the heartbeat message sending unit.

其中,所述地面控制中心包括入站心跳消息接收单元、心跳消息控制信令配置单元、心跳消息处理单元和控制参数发送单元;入站心跳消息接收单元用于接收用户机发送的心跳信号;心跳消息控制信令配置单元用于为用户机配置心跳信号对应的控制参数;心跳消息处理单元用于通过对心跳消息进行处理,获得用户机位置,发射功率调整量以及卫星链路状态信息;控制参数发送单元用于将心跳消息控制信令配置单元和心跳消息处理单元的结果通知给用户机;Wherein, the ground control center includes an inbound heartbeat message receiving unit, a heartbeat message control signaling configuration unit, a heartbeat message processing unit and a control parameter sending unit; the inbound heartbeat message receiving unit is used to receive the heartbeat signal sent by the user machine; The message control signaling configuration unit is used to configure the control parameters corresponding to the heartbeat signal for the user machine; the heartbeat message processing unit is used to process the heartbeat message to obtain the position of the user machine, the amount of transmission power adjustment and the status information of the satellite link; the control parameters The sending unit is used to notify the user machine of the results of the heartbeat message control signaling configuration unit and the heartbeat message processing unit;

所述用户机包括出站信号测量单元,出站心跳消息控制信令接收单元,心跳消息定时器单元和入站消息发送单元;出站信号测量单元用于测量接收到的下行信号功率电平和/或信号质量;出站心跳消息控制信令接收单元用于解析地面中心站下发的入站心跳消息的控制信令;心跳消息定时器单元用于设定心跳消息发送周期和发送时刻;入站消息发送单元用于发送心跳消息,同时将发送时刻反馈给心跳消息定时器单元。The user machine includes an outbound signal measurement unit, an outbound heartbeat message control signaling receiving unit, a heartbeat message timer unit and an inbound message sending unit; the outbound signal measurement unit is used to measure the received downlink signal power level and/or or signal quality; the outbound heartbeat message control signaling receiving unit is used to analyze the control signaling of the inbound heartbeat message issued by the ground center station; the heartbeat message timer unit is used to set the heartbeat message sending cycle and sending time; the inbound The message sending unit is used to send the heartbeat message, and at the same time feed back the sending time to the heartbeat message timer unit.

基于上述卫星移动通信系统心跳消息的实现系统,本发明还提供一种卫星移动通信系统心跳消息的实现方法,具体为:用户机周期性地和/或由事件触发地发送心跳消息,所述心跳消息包含同步头和勤务段,且勤务段的有效信息包含用户地址和/或锁定出站波束号;地面控制中心接收到用户机发送的心跳消息后,对心跳消息进行有源定位,从而获得用户机的地理位置;或者地面控制中心通过计算心跳信号质量,得到用户机发射功率的调整量,并决定是否将功率调整量反馈给相应用户机,从而实现用户机发射功率的闭环功率控制;或者地面控制中心通过心跳消息快速获得当前用户机的卫星链路状态。Based on the system for realizing the heartbeat message of the satellite mobile communication system, the present invention also provides a method for realizing the heartbeat message of the satellite mobile communication system, specifically: the user machine sends the heartbeat message periodically and/or triggered by an event, and the heartbeat message The message contains the synchronization header and the duty segment, and the effective information of the duty segment includes the user address and/or locked outbound beam number; after receiving the heartbeat message sent by the user machine, the ground control center performs active positioning on the heartbeat message to obtain the user's or the ground control center obtains the adjustment amount of the transmission power of the user machine by calculating the quality of the heartbeat signal, and decides whether to feed back the power adjustment amount to the corresponding user machine, so as to realize the closed-loop power control of the user machine transmission power; or the ground The control center quickly obtains the satellite link status of the current user computer through the heartbeat message.

本发明中,所述心跳消息包含同步头和勤务段,同步头用于地面中心站对入站心跳信号进行捕获和跟踪,勤务段电文包含用户地址和服务波束,所述用户地址用于指示用户的身份,所述服务波束用于用户机有源定位。In the present invention, the heartbeat message includes a synchronization header and a service section, the synchronization header is used for the ground center station to capture and track the inbound heartbeat signal, the service section message contains a user address and a service beam, and the user address is used to instruct the user The identity of the service beam is used for active positioning of the user machine.

本发明中,用户机由事件触发地发送心跳消息是指当用户机的心跳消息定时器单元超时或服务波束发生切换时,用户机发送心跳消息,使地面控制中心可更新用户机位置,发射功率和卫星链路状态信息;当用户机的心跳消息定时器单元没有超时且服务波束没有发生切换时,用户机不发送心跳消息。In the present invention, the user machine sends a heartbeat message triggered by an event means that when the heartbeat message timer unit of the user machine times out or the service beam is switched, the user machine sends a heartbeat message, so that the ground control center can update the user machine location, transmission power and satellite link status information; when the heartbeat message timer unit of the user machine does not expire and the service beam does not switch, the user machine does not send a heartbeat message.

本发明中,用户机的心跳消息定时器单元重启的方法是:用户机每发送一次入站消息,就重启心跳消息定时器单元,入站消息包括心跳消息和非心跳消息;当心跳消息定时器单元超时时,用户机发送一个心跳消息,并重启心跳消息定时器单元;或者用户机每发送一次心跳消息,就重启心跳消息定时器单元。In the present invention, the restarting method of the heartbeat message timer unit of the user machine is: the user machine just restarts the heartbeat message timer unit every time an inbound message is sent, and the inbound message includes a heartbeat message and a non-heartbeat message; when the heartbeat message timer When the unit times out, the user machine sends a heartbeat message and restarts the heartbeat message timer unit; or every time the user machine sends a heartbeat message, it restarts the heartbeat message timer unit.

本发明中,用户机的心跳消息定时器单元时长的配置方法是:地面控制中心根据实时的在线用户数目以及入站流量来配置心跳消息定时器单元的时长,并定期地通过出站链路将更新的心跳消息定时器单元时长广播给所有用户机;或者地面控制中心定期向所有用户广播当前系统入站流量或入站负荷情况,用户机根据预先设置好的系统入站流量或负荷情况和心跳消息定时器时长的对应关系,确定当前心跳消息定时器的时长。In the present invention, the configuration method of the duration of the heartbeat message timer unit of the user machine is: the ground control center configures the duration of the heartbeat message timer unit according to the number of real-time online users and the inbound flow, and periodically passes the outbound link to The updated heartbeat message timer unit duration is broadcast to all user machines; or the ground control center periodically broadcasts the current system inbound flow or inbound load to all users, and the user machines are based on the preset system inbound flow or load and heartbeat The corresponding relationship between the duration of the message timer determines the duration of the current heartbeat message timer.

本发明中,用户机的出站信号测量单元实时接收和测量各个出站波束的信号平均功率水平〈Pi〉和信号质量,信号质量用载噪比〈CNRi〉或信噪比〈SNRi〉来表示;若用户机接收到的信号质量最好的出站波束与当前服务波束的信号质量相比,高于规定的阈值,即满足下式:In the present invention, the outbound signal measurement unit of the user machine receives and measures the signal average power level <P i > and signal quality of each outbound beam in real time, and the signal quality is defined by the carrier-to-noise ratio <CNR i > or the signal-to-noise ratio <SNR i > to represent; if the outbound beam with the best signal quality received by the user machine is higher than the specified threshold compared with the signal quality of the current service beam, the following formula is satisfied:

〈SNR非服务波束,i〉-〈SNR服务波束〉>Threshold〈SNR non-serving beam, i 〉-〈SNR serving beam 〉>Threshold

那么当前服务波束将切换到新的信号质量最好的出站波束上。Then the current serving beam will be switched to the new outbound beam with the best signal quality.

本发明中,地面控制中心接收到用户机发送的心跳消息后采用RDSS定位方法获得用户机的地理位置,具体步骤为:In the present invention, the ground control center adopts the RDSS positioning method to obtain the geographic location of the user machine after receiving the heartbeat message sent by the user machine, and the specific steps are:

步骤101:地面控制中心接收到用户机经不同卫星i转发入站的多份相同的心跳消息,并测量各入站心跳消息到达的时间TRx,i,从而计算出发射出站信号到收到用户机响应其出站信号所需的空间传播时延ΔTiStep 101: The ground control center receives multiple copies of the same heartbeat message forwarded inbound by the user machine via different satellite i, and measures the arrival time T Rx,i of each inbound heartbeat message, thereby calculating the time between sending the outbound signal and receiving the user The space propagation delay ΔT i required for the machine to respond to its outbound signal:

收-发时间差ΔTi=地面控制中心接收到用户机入站信号时间TRx,i–地面控制中心出站消息发射时间TTx Receive-send time difference ΔT i = the time when the ground control center receives the inbound signal from the user machine T Rx, i - the time when the ground control center transmits the outbound message T Tx

步骤102:地面控制中心按以下公式计算出用户位置:Step 102: The ground control center calculates the user position according to the following formula:

其中(X控制中心,Y控制中心,Z控制中心)为地面控制中心的位置坐标;(Xi,Yi,Zi)为卫星i的位置坐标,X0,Y0,Z0)为用户机出站服务波束所属的卫星位置坐标;(X用户机,Y用户机,Z用户机)为待求的用户机位置坐标。Where (X control center , Y control center , Z control center ) is the position coordinates of the ground control center; (X i , Y i , Z i ) is the position coordinates of satellite i, X 0 , Y 0 , Z 0 ) is the user (X user machine , Y user machine , Z user machine ) are the position coordinates of the user machine to be requested.

本发明中,地面控制中心通过计算心跳信号质量,得到用户机发射功率的调整量,并决定是否将功率调整量反馈给相应用户机,具体方法为:In the present invention, the ground control center obtains the adjustment amount of the transmission power of the user machine by calculating the quality of the heartbeat signal, and decides whether to feed back the power adjustment amount to the corresponding user machine. The specific method is:

步骤201:地面控制中心计算入站心跳消息对应的载噪比CNR真实或者信噪比SNR真实,并与目标载噪比CNR目标或者目标信噪比SNR目标进行比较,两者差异即为用户机发射功率调整量ΔP:Step 201: The ground control center calculates the carrier-to-noise ratio CNR true or signal-to-noise ratio SNR true corresponding to the inbound heartbeat message, and compares it with the target carrier-to-noise ratio CNR target or target signal-to-noise ratio SNR target , and the difference between the two is the user machine Transmit power adjustment ΔP:

ΔP=CNR目标–CNR真实 ΔP = CNR target – CNR true

或者,ΔP=SNR目标–SNR真实 Alternatively, ΔP = SNR Target – SNR True

ΔP为正数,表示用户机需增加发射功率,ΔP为负数则表示用户机需降低发射功率;ΔP is a positive number, which means that the user machine needs to increase the transmission power, and ΔP is a negative number, which means that the user machine needs to reduce the transmission power;

步骤202:地面控制中心根据当前出站信道资源以及ΔP的大小决定是否给相应用户机反馈发射功率调整量;Step 202: The ground control center decides whether to feed back the transmission power adjustment amount to the corresponding user machine according to the current outbound channel resource and the size of ΔP;

若ΔP的绝对值低于阈值M,即|ΔP|≤M,地面控制中心不反馈相应用户机的发射功率调整量;若|ΔP|>M,地面控制中心按规定的量化精度发送调整量。If the absolute value of ΔP is lower than the threshold M, that is, |ΔP|≤M, the ground control center does not feed back the adjustment amount of the transmit power of the corresponding user machine; if |ΔP|>M, the ground control center sends the adjustment amount according to the specified quantization accuracy.

本发明的有益效果是:The beneficial effects of the present invention are:

通过用户机发送入站心跳消息,地面控制中心可以快速、实时地获得用户位置,发射功率和状态信息;并且在保证一定的功率控制准确度的同时,可降低心跳信令的开销;同时,由于心跳消息位长很短,有利于增强用户机电池寿命和续航能力。By sending the inbound heartbeat message from the user machine, the ground control center can quickly and real-time obtain user location, transmission power and status information; and while ensuring a certain power control accuracy, it can reduce the overhead of heartbeat signaling; at the same time, due to The bit length of the heartbeat message is very short, which is beneficial to enhance the battery life and battery life of the user machine.

附图说明Description of drawings

图1是本发明实施例提供的用户机发送的心跳消息的电文结构示意图Fig. 1 is a schematic diagram of the message structure of the heartbeat message sent by the user machine provided by the embodiment of the present invention

图2是本发明实施例提供的用户机心跳信号发送单元的工作流程示意图;2 is a schematic diagram of the workflow of the heartbeat signal sending unit of the user machine provided by the embodiment of the present invention;

图3是本发明实施例提供的地面控制中心接收到用户机心跳消息后采用RDSS定位方法计算用户机地理位置的流程图;Fig. 3 is the flow chart of calculating the geographical position of the user machine by using the RDSS positioning method after the ground control center receives the heartbeat message of the user machine provided by the embodiment of the present invention;

图4是本发明实施例提供的地面控制中心接收到用户机心跳消息后计算用户机功率调整量的流程图;Fig. 4 is a flow chart of calculating the user machine power adjustment amount after the ground control center receives the user machine heartbeat message provided by the embodiment of the present invention;

图5是本发明实施例提供的用户机结构示意图;Fig. 5 is a schematic structural diagram of a user machine provided by an embodiment of the present invention;

图6是本发明实施例提供的地面控制中心结构示意图;Fig. 6 is a schematic structural diagram of a ground control center provided by an embodiment of the present invention;

图7是本发明实施例提供的心跳消息收发系统结构示意图。Fig. 7 is a schematic structural diagram of a heartbeat message sending and receiving system provided by an embodiment of the present invention.

具体实施方式Detailed ways

下面结合附图,对本发明作进一步的说明:Below in conjunction with accompanying drawing, the present invention will be further described:

图1是本发明技术提供的用户机发送的心跳消息的电文结构示意图,所述心跳消息包含2部分,同步头和勤务段。同步头用于地面中心站对入站心跳信号进行捕获和跟踪,勤务段电文包含用户地址(用于指示用户的身份),服务波束(用于用户机有源定位)。Fig. 1 is a schematic diagram of the message structure of the heartbeat message sent by the user machine provided by the technology of the present invention. The heartbeat message includes two parts, a synchronization header and a service segment. The synchronization head is used by the ground central station to capture and track the inbound heartbeat signal, and the service segment message contains the user address (used to indicate the identity of the user), and the service beam (used for active positioning of the user machine).

图2是本发明技术提供的用户机发送心跳消息工作流程示意图,包括以下功能:Fig. 2 is a schematic diagram of the work flow of sending a heartbeat message from a user machine provided by the technology of the present invention, including the following functions:

用户机是否发送心跳消息由用户机心跳消息定时器单元是否超时以及服务波束是否发生切换共同确定。Whether the user machine sends a heartbeat message is jointly determined by whether the heartbeat message timer unit of the user machine times out and whether the service beam is switched.

当用户机心跳消息定时器单元超时或服务波束发生切换时,用户机发送心跳消息,使地面控制中心可更新用户机位置,发射功率和卫星链路状态信息。当用户机心跳消息定时器单元没有超时且服务波束没有发生切换时,用户机不发送心跳消息。When the heartbeat message timer unit of the user machine times out or the service beam is switched, the user machine sends a heartbeat message, so that the ground control center can update the user machine position, transmission power and satellite link status information. When the heartbeat message timer unit of the user machine does not time out and the service beam does not switch, the user machine does not send a heartbeat message.

一方面,用户机心跳消息定时器单元重启的方法是:On the one hand, the method for restarting the heartbeat message timer unit of the user machine is:

用户机每发送一次入站消息,该入站消息包括心跳消息和非心跳消息,就重启心跳消息定时器;当心跳消息定时器超时时,用户机发送一个心跳消息,并重启心跳消息定时器。Every time the user machine sends an inbound message, the inbound message includes a heartbeat message and a non-heartbeat message, and the heartbeat message timer is restarted; when the heartbeat message timer expires, the user machine sends a heartbeat message and restarts the heartbeat message timer.

或者,or,

用户机每发送一次心跳消息,就重启心跳消息定时器。Every time the user computer sends a heartbeat message, the heartbeat message timer is restarted.

进一步,用户机心跳消息定时器时长的配置方法可以是:Further, the configuration method of the user machine heartbeat message timer duration can be:

地面控制中心根据实时的在线用户数目以及入站流量来配置心跳消息定时器的时长,并定期地通过出站链路将更新的心跳消息定时器时长广播给所有用户机。比如,若当前入站流量较大,在线用户数目较多,可配置较长的心跳消息定时器时长,以避免入站阻塞;反之,可配置较短的心跳消息定时器时长。The ground control center configures the duration of the heartbeat message timer according to the number of real-time online users and inbound traffic, and periodically broadcasts the updated duration of the heartbeat message timer to all user machines through the outbound link. For example, if the current inbound traffic is large and the number of online users is large, you can configure a longer heartbeat message timer to avoid inbound congestion; otherwise, you can configure a shorter heartbeat message timer.

或者,or,

地面控制中心定期向所有用户广播当前系统入站流量或入站负荷情况,用户机根据预先设置好的系统入站流量或负荷情况和心跳消息定时器时长的对应关系,确定当前心跳消息定时器的时长。The ground control center regularly broadcasts the current system inbound traffic or inbound load to all users, and the user machine determines the current heartbeat message timer according to the corresponding relationship between the preset system inbound traffic or load and the heartbeat message timer duration. duration.

或者,or,

用户机根据地面控制中心广播的当前心跳消息定时器时长,或者系统入站流量或入站负荷情况,并结合用户机自身状态,确定自身心跳消息定时器时长,最终确定的心跳消息定时器时长不低于地面控制中心推荐的定时器时长。其中,用户机自身状态可以是当前电池余量,设置的电量使用模式,所处地理环境等。比如,当用户机当前剩余电量低于某一阈值时,为了省电,用户机可以选择比地面控制中心推荐的定时器时长更长的时长;或者当用户机设置为省电模式时,用户机也可以选择比地面控制中心推荐的定时器时长更长的时长;或者当用户机检测到出站信道质量状态在较长时间内都比较稳定,这种情况常见于固定用户机,或移动速度缓慢且处于开阔地区的用户机,用户机也可以选择比地面控制中心推荐的定时器时长更长的时长。由于各用户机自身状态可能不一样,因此各用户机的心跳消息定时器时长也可能不一样。The user machine determines the length of its own heartbeat message timer according to the current heartbeat message timer broadcast by the ground control center, or the inbound traffic or inbound load of the system, and combines the state of the user machine itself to determine the length of its own heartbeat message timer. The timer duration is lower than recommended by the ground control center. Wherein, the state of the user machine itself may be the current remaining battery capacity, the set power usage mode, the geographical environment, etc. For example, when the current remaining power of the user machine is lower than a certain threshold, in order to save power, the user machine can choose a longer duration than the timer recommended by the ground control center; or when the user machine is set to power saving mode, the user machine You can also choose a longer duration than the timer recommended by the ground control center; or when the user machine detects that the outbound channel quality status is relatively stable for a long time, this situation is common in fixed user machines, or the moving speed is slow And for the user machine in an open area, the user machine can also choose a longer duration than the timer recommended by the ground control center. Since the state of each user machine may be different, the duration of the heartbeat message timer of each user machine may also be different.

另一方面,用户机出站服务波束的切换方法是:On the other hand, the switching method of the outbound service beam of the user machine is:

用户机的出站信号质量测量单元实时接收和测量各个出站波束的信号平均功率水平〈Pi〉和信号质量,信号质量可以用载噪比〈CNRi〉或信噪比〈SNRi〉来表示。若用户机接收到的信号质量最好的出站波束与当前服务波束的信号质量相比,高于规定的阈值,即满足下式:The outbound signal quality measurement unit of the user machine receives and measures the signal average power level 〈P i 〉 and signal quality of each outbound beam in real time . express. If the outbound beam with the best signal quality received by the user machine is higher than the specified threshold compared with the signal quality of the current service beam, the following formula is met:

〈SNR非服务波束,i〉-〈SNR服务波束〉>Threshold〈SNR non-serving beam, i 〉-〈SNR serving beam 〉>Threshold

那么当前服务波束将切换到新的信号质量最好的出站波束上。Then the current serving beam will be switched to the new outbound beam with the best signal quality.

图3是地面控制中心接收到用户机心跳消息后采用RDSS定位方法计算用户机地理位置的流程图。Fig. 3 is a flow chart of calculating the geographical location of the user computer by using the RDSS positioning method after the ground control center receives the heartbeat message of the user computer.

步骤101:地面控制中心接收到用户机经不同卫星i转发入站的多份相同的心跳消息,并测量各入站心跳消息到达的时间TRx,i,从而计算出发射出站信号到收到用户机响应其出站信号所需的空间传播时延ΔTiStep 101: The ground control center receives multiple copies of the same heartbeat message forwarded inbound by the user machine via different satellite i, and measures the arrival time T Rx,i of each inbound heartbeat message, thereby calculating the time between sending the outbound signal and receiving the user The space propagation delay ΔT i required for the machine to respond to its outbound signal:

收-发时间差ΔTi=地面控制中心接收到用户机入站信号时间TRx,i–地面控制中心出站消息发射时间TTx Receive-send time difference ΔT i = the time when the ground control center receives the inbound signal from the user machine T Rx, i - the time when the ground control center transmits the outbound message T Tx

步骤102:地面控制中心按以下公式计算出用户位置:Step 102: The ground control center calculates the user position according to the following formula:

其中(X控制中心,Y控制中心,Z控制中心)为地面控制中心的位置,为已知值;(Xi,Yi,Zi)为卫星i的位置,且(X0,Y0,Z0)为用户机出站服务波束所属的卫星位置,也为已知值;(X用户机,Y用户机,Z用户机)为待求的用户机位置。Where (X control center , Y control center , Z control center ) is the position of the ground control center, which is a known value; (X i , Y i , Z i ) is the position of satellite i, and (X 0 , Y 0 , Z 0 ) is the satellite position to which the outbound service beam of the user machine belongs, and is also a known value; (X user machine , Y user machine , Z user machine ) is the desired user machine position.

图4是地面控制中心接收到用户机心跳消息后获得和处理用户机功率调整量的流程图。Fig. 4 is a flow chart of obtaining and processing the power adjustment amount of the user machine after the ground control center receives the heartbeat message of the user machine.

步骤201:地面控制中心计算入站心跳消息对应的载噪比CNR真实或者信噪比SNR真实,并与目标载噪比CNR目标或者目标信噪比SNR目标进行比较,两者差异即为用户机发射功率调整量ΔP:Step 201: The ground control center calculates the carrier-to-noise ratio CNR true or signal-to-noise ratio SNR true corresponding to the inbound heartbeat message, and compares it with the target carrier-to-noise ratio CNR target or target signal-to-noise ratio SNR target , and the difference between the two is the user machine Transmit power adjustment ΔP:

ΔP=CNR目标–CNR真实 ΔP = CNR target – CNR true

或者,ΔP=SNR目标–SNR真实 Alternatively, ΔP = SNR Target – SNR True

ΔP为正数,表示用户机需增加发射功率,反之,表示用户机需降低发射功率。ΔP is a positive number, which means that the user machine needs to increase the transmission power, otherwise, it means that the user machine needs to reduce the transmission power.

步骤202:地面控制中心根据当前出站信道资源以及ΔP的大小决定是否给相应用户机反馈发射功率调整量。若出站信道资源比较紧张或ΔP的绝对值低于阈值M,即|ΔP|≤M,地面控制中心可以不反馈相应用户机的发射功率调整量。若出站信道资源充足且|ΔP|>M,地面控制中心按一定量化颗粒度发送调整量,比如,假设M=3dB,量化颗粒度为0.5dB,|ΔP|=3.61,那么功率调整量为3.5dB。Step 202: The ground control center decides whether to feed back the transmission power adjustment amount to the corresponding user machine according to the current outbound channel resource and the size of ΔP. If the outbound channel resource is relatively tight or the absolute value of ΔP is lower than the threshold M, ie |ΔP|≤M, the ground control center may not feed back the transmit power adjustment amount of the corresponding user machine. If the outbound channel resource is sufficient and |ΔP|>M, the ground control center sends the adjustment amount at a certain quantization granularity, for example, assuming M=3dB, the quantization granularity is 0.5dB, |ΔP|=3.61, then the power adjustment amount is 3.5dB.

另外,地面控制中心从入站心跳消息中可获知最新的服务波束号,并可用来更新用户机状态中的服务波束号信息,优选作为用户机的出站波束。In addition, the ground control center can obtain the latest service beam number from the inbound heartbeat message, which can be used to update the service beam number information in the user machine status, preferably as the outbound beam of the user machine.

在本发明实施例中,通过用户机发送入站心跳消息,地面控制中心可以快速、实时地获得用户位置,发射功率和状态信息。并且相比于非心跳消息,心跳消息位长很短,有利于增强用户机电池寿命和续航能力。In the embodiment of the present invention, by sending an inbound heartbeat message from the user machine, the ground control center can obtain user location, transmission power and status information quickly and in real time. Moreover, compared with non-heartbeat messages, the bit length of heartbeat messages is very short, which is beneficial to enhance the battery life and battery life of the user machine.

本领域普通技术人员可以理解,上述各实施例中的全部或部分步骤可以通过程序指令相关的硬件来实现,上述的程序可以存储于计算机可读取存储介质中,上述的存储介质可以是ROM/RAM,磁盘,光盘等。Those of ordinary skill in the art can understand that all or part of the steps in the above-mentioned embodiments can be implemented by hardware related to program instructions, and the above-mentioned program can be stored in a computer-readable storage medium, and the above-mentioned storage medium can be a ROM/ RAM, Disk, CD, etc.

图5所示为本发明实施例提供的一种用户机,能够实现本发明上述方法实施例所提供的卫星移动通信系统心跳消息的实现方法。该用户机包括:出站信号质量测量单元,出站心跳消息控制信令接收单元,心跳消息定时器单元,入站信号发送单元。其中:出站信号质量测量单元,用于测量接收到的各个出站波束的信号功率电平和/或信号质量,若用户机接收到的信号质量最好的出站波束与当前服务波束的信号质量相比,高于规定的阈值,则将当前服务波束切换到信号质量最好的出站波束上,同时触发入站信号发送单元,发送心跳消息;出站心跳消息控制信令接收单元,用于解析地面中心站下发的入站心跳消息的控制信令,以配置心跳消息定时器的时长;心跳消息定时器单元,用于设定心跳消息发送周期和发送时刻,当心跳消息定时器超时时,就触发入站信号发送单元,发送心跳消息,并重启心跳消息定时器;入站信号发送单元,当发生波束切换或心跳消息定时器超时时,则触发入站信号发送单元发送心跳消息,同时将发送时刻反馈给心跳消息定时器单元,立即重启心跳消息定时器。FIG. 5 shows a user machine provided by an embodiment of the present invention, capable of implementing the method for realizing heartbeat messages of a satellite mobile communication system provided by the above-mentioned method embodiments of the present invention. The user machine includes: an outbound signal quality measurement unit, an outbound heartbeat message control signaling receiving unit, a heartbeat message timer unit, and an inbound signal sending unit. Among them: the outbound signal quality measurement unit is used to measure the signal power level and/or signal quality of each outbound beam received, if the outbound beam with the best signal quality received by the user machine and the signal quality of the current service beam If it is higher than the specified threshold, the current service beam is switched to the outbound beam with the best signal quality, and the inbound signal sending unit is triggered at the same time to send a heartbeat message; the outbound heartbeat message controls the signaling receiving unit for Analyze the control signaling of the inbound heartbeat message issued by the ground center station to configure the duration of the heartbeat message timer; the heartbeat message timer unit is used to set the heartbeat message sending cycle and sending time, when the heartbeat message timer expires , trigger the inbound signal sending unit to send a heartbeat message, and restart the heartbeat message timer; the inbound signal sending unit, when beam switching occurs or the heartbeat message timer times out, trigger the inbound signal sending unit to send a heartbeat message, and at the same time The sending time is fed back to the heartbeat message timer unit, and the heartbeat message timer is restarted immediately.

图6所示为本发明实施例提供的一种地面控制中心,能够实现本发明上述方法实施例所提供的卫星移动通信系统心跳消息的实现方法。该地面控制中心包括入站心跳消息接收单元、心跳消息控制信令配置单元、心跳消息处理单元和控制参数发送单元。其中,入站心跳消息接收单元,用于接收用户机发送的心跳信号;心跳消息控制信令配置单元,用于为用户机配置心跳信号对应的控制参数;心跳消息处理单元,用于通过对心跳消息进行处理,获得用户机位置,发射功率调整量,卫星链路状态等信息。控制参数发送单元,用于将心跳消息控制信令配置单元和心跳消息处理单元的结果通知给所述用户设备。FIG. 6 shows a ground control center provided by an embodiment of the present invention, capable of realizing the implementation method of the heartbeat message of the satellite mobile communication system provided by the above-mentioned method embodiments of the present invention. The ground control center includes an inbound heartbeat message receiving unit, a heartbeat message control signaling configuration unit, a heartbeat message processing unit and a control parameter sending unit. Among them, the inbound heartbeat message receiving unit is used to receive the heartbeat signal sent by the user machine; the heartbeat message control signaling configuration unit is used to configure the control parameters corresponding to the heartbeat signal for the user machine; The message is processed to obtain information such as the position of the user machine, the amount of transmission power adjustment, and the status of the satellite link. The control parameter sending unit is configured to notify the user equipment of the results of the heartbeat message control signaling configuration unit and the heartbeat message processing unit.

本发明实施例还相应提供一种卫星移动通信系统心跳消息的实现系统,如图7所示,包括地面控制中心和用户机;Embodiments of the present invention also provide a system for realizing a heartbeat message of a satellite mobile communication system, as shown in FIG. 7 , including a ground control center and a user machine;

地面控制中心,用于为用户机配置入站心跳消息对应的控制参数,并根据接收到的心跳消息计算用户地理位置,发射功率调整量,以及更新用户机状态,然后将配置的心跳消息控制参数和/或根据心跳消息计算的用户位置和/或发射功率调整量结果发送给所述用户机;The ground control center is used to configure the control parameters corresponding to the inbound heartbeat message for the user machine, and calculate the user's geographic location, transmit power adjustment, and update the state of the user machine according to the received heartbeat message, and then set the configured heartbeat message control parameters And/or send the user position and/or transmit power adjustment results calculated according to the heartbeat message to the user machine;

用户机,用于接收地面控制中心配置的心跳消息控制参数,并根据所述心跳消息发送单元指示,发送心跳消息。The user machine is configured to receive the heartbeat message control parameters configured by the ground control center, and send the heartbeat message according to the instructions of the heartbeat message sending unit.

需要特别说明的是,附图和相关描述只是为了说明本发明的原理,并非用于限定本发明的保护范围。例如,本发明实施例中的消息名称和实体可以根据网络的不同而有所变化,一些消息也可以省略。因此,凡这在本发明的精神和原则之内所作的任何修改,等同替换,改进等均包含在本发明的保护范围内。虽然通过参照本发明的实施例,已经对本发明进行了图示和描述,但本领域的普通技术人员应该明白,可以在形式上和细节上对其作各种改变,而不偏离本发明的精神和范围。It should be noted that the drawings and related descriptions are only for illustrating the principles of the present invention, and are not intended to limit the protection scope of the present invention. For example, message names and entities in the embodiments of the present invention may vary according to different networks, and some messages may also be omitted. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention. Although the present invention has been illustrated and described with reference to the embodiments of the present invention, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit of the present invention. and range.

Claims (8)

1.一种卫星移动通信系统心跳消息的实现系统,其特征在于,包括地面控制中心和用户机,地面控制中心用于为用户机配置入站心跳消息对应的控制参数,并根据接收到的心跳消息计算用户地理位置,发射功率调整量以及更新用户机状态,然后将配置的心跳消息控制参数和/或根据心跳消息计算的用户位置和/或发射功率调整量结果发送给所述用户机;用户机用于接收地面控制中心配置的心跳消息控制参数,并根据所述心跳消息控制参数,发送心跳消息;所述地面控制中心包括入站心跳消息接收单元、心跳消息控制信令配置单元、心跳消息处理单元和控制参数发送单元;入站心跳消息接收单元用于接收用户机发送的心跳信号;心跳消息控制信令配置单元用于为用户机配置心跳信号对应的控制参数;心跳消息处理单元用于通过对心跳消息进行处理,获得用户机位置,发射功率调整量以及卫星链路状态信息;控制参数发送单元用于将心跳消息控制信令配置单元和心跳消息处理单元的结果通知给用户机;1. A system for realizing a heartbeat message of a mobile satellite communication system, characterized in that it includes a ground control center and a user machine, and the ground control center is used to configure the control parameters corresponding to the incoming heartbeat message for the user machine, and according to the received heartbeat The message calculates the user's geographic location, the transmission power adjustment amount, and updates the state of the user machine, and then sends the configured heartbeat message control parameters and/or the user position and/or transmission power adjustment results calculated according to the heartbeat message to the user machine; the user The machine is used to receive the heartbeat message control parameters configured by the ground control center, and send a heartbeat message according to the heartbeat message control parameters; the ground control center includes an inbound heartbeat message receiving unit, a heartbeat message control signaling configuration unit, a heartbeat message The processing unit and the control parameter sending unit; the inbound heartbeat message receiving unit is used to receive the heartbeat signal sent by the user machine; the heartbeat message control signaling configuration unit is used to configure the control parameters corresponding to the heartbeat signal for the user machine; the heartbeat message processing unit is used for By processing the heartbeat message, the location of the user machine, the amount of transmission power adjustment and the status information of the satellite link are obtained; the control parameter sending unit is used to notify the user machine of the results of the heartbeat message control signaling configuration unit and the heartbeat message processing unit; 所述用户机包括出站信号质量测量单元,出站心跳消息控制信令接收单元,心跳消息定时器单元和入站信号发送单元;出站信号质量测量单元用于测量接收到的下行信号功率电平和/或信号质量;出站心跳消息控制信令接收单元用于解析地面中心站下发的入站心跳消息的控制信令;心跳消息定时器单元用于设定心跳消息发送周期和发送时刻;入站信号发送单元用于发送心跳消息,同时将发送时刻反馈给心跳消息定时器单元。The user machine includes an outbound signal quality measurement unit, an outbound heartbeat message control signaling receiving unit, a heartbeat message timer unit and an inbound signal sending unit; the outbound signal quality measurement unit is used to measure the received downlink signal power level Peace and/or signal quality; the outbound heartbeat message control signaling receiving unit is used to analyze the control signaling of the inbound heartbeat message issued by the ground central station; the heartbeat message timer unit is used to set the heartbeat message sending cycle and sending time; The inbound signal sending unit is used to send a heartbeat message, and at the same time feed back the sending time to the heartbeat message timer unit. 2.一种卫星移动通信系统心跳消息的实现方法,其特征在于:用户机周期性地和/或由事件触发地发送心跳消息,所述心跳消息包含同步头和勤务段,且勤务段的有效信息包含用户地址和/或锁定出站波束号;2. A method for realizing the heartbeat message of a mobile satellite communication system, characterized in that: the user machine periodically and/or is triggered by an event to send a heartbeat message, the heartbeat message includes a synchronization header and a duty segment, and the effective duty segment Messages containing user addresses and/or locked outbound beam numbers; 地面控制中心接收到用户机发送的心跳消息后,对心跳消息进行有源定位,从而获得用户机的地理位置,方法如下:After receiving the heartbeat message sent by the user machine, the ground control center performs active positioning on the heartbeat message to obtain the geographic location of the user machine. The method is as follows: 步骤101:地面控制中心接收到用户机经不同卫星i转发入站的多份相同的心跳消息,并测量各入站心跳消息到达的时间TRx,i,从而计算出发射出站信号到收到用户机响应其出站信号所需的空间传播时延ΔTiStep 101: The ground control center receives multiple copies of the same heartbeat message forwarded inbound by the user machine via different satellite i, and measures the arrival time T Rx,i of each inbound heartbeat message, thereby calculating the time between sending the outbound signal and receiving the user The space propagation delay ΔT i required for the machine to respond to its outbound signal: 收-发时间差ΔTi=地面控制中心接收到用户机入站信号时间TRx,i–地面控制中心出站消息发射时间TTx Receive-send time difference ΔT i = the time when the ground control center receives the inbound signal from the user machine T Rx, i - the time when the ground control center transmits the outbound message T Tx 步骤102:地面控制中心按以下公式计算出用户位置:Step 102: The ground control center calculates the user position according to the following formula: 其中(X控制中心,Y控制中心,Z控制中心)为地面控制中心的位置坐标;(Xi,Yi,Zi)为卫星i的位置坐标,X0,Y0,Z0)为用户机出站服务波束所属的卫星位置坐标;(X用户机,Y用户机,Z用户机)为待求的用户机位置坐标;Where (X control center , Y control center , Z control center ) is the position coordinates of the ground control center; (X i , Y i , Z i ) is the position coordinates of satellite i, X 0 , Y 0 , Z 0 ) is the user The satellite position coordinates to which the machine's outbound service beam belongs; (X user machine , Y user machine , Z user machine ) are the position coordinates of the user machine to be requested; 或者地面控制中心通过计算心跳信号质量,得到用户机发射功率的调整量,并决定是否将功率调整量反馈给相应用户机,从而实现用户机发射功率的闭环功率控制;Or the ground control center obtains the adjustment amount of the transmit power of the user machine by calculating the quality of the heartbeat signal, and decides whether to feed back the power adjustment amount to the corresponding user machine, so as to realize the closed-loop power control of the transmit power of the user machine; 或者地面控制中心通过心跳消息快速获得当前用户机的卫星链路状态。Or the ground control center quickly obtains the satellite link status of the current user machine through the heartbeat message. 3.根据权利要求2所述的卫星移动通信系统心跳消息的实现方法,其特征在于:所述心跳消息包含同步头和勤务段,同步头用于地面中心站对入站心跳信号进行捕获和跟踪,勤务段电文包含用户地址和服务波束,所述用户地址用于指示用户的身份,所述服务波束用于用户机有源定位。3. the realization method of satellite mobile communication system heartbeat message according to claim 2, it is characterized in that: described heartbeat message comprises synchronous header and service section, and synchronous header is used for ground central station to capture and track inbound heartbeat signal , the service segment message includes a user address and a service beam, the user address is used to indicate the identity of the user, and the service beam is used for active positioning of the user machine. 4.根据权利要求3所述的卫星移动通信系统心跳消息的实现方法,其特征在于:用户机由事件触发地发送心跳消息是指当用户机的心跳消息定时器单元超时或服务波束发生切换时,用户机发送心跳消息,使地面控制中心可更新用户机位置,发射功率和卫星链路状态信息;当用户机的心跳消息定时器单元没有超时且服务波束没有发生切换时,用户机不发送心跳消息。4. The method for realizing the heartbeat message of the satellite mobile communication system according to claim 3 is characterized in that: the user machine sends the heartbeat message triggered by an event and refers to when the heartbeat message timer unit of the user machine is overtime or the service beam is switched , the user machine sends a heartbeat message, so that the ground control center can update the user machine location, transmission power and satellite link status information; when the heartbeat message timer unit of the user machine does not time out and the service beam does not switch, the user machine does not send a heartbeat information. 5.根据权利要求4所述的卫星移动通信系统心跳消息的实现方法,其特征在于:用户机的心跳消息定时器单元重启的方法是:用户机每发送一次入站消息,就重启心跳消息定时器单元,入站消息包括心跳消息和非心跳消息;当心跳消息定时器单元超时时,用户机发送一个心跳消息,并重启心跳消息定时器;或者用户机每发送一次心跳消息,就重启心跳消息定时器单元。5. the method for realizing the heartbeat message of the satellite mobile communication system according to claim 4 is characterized in that: the method that the heartbeat message timer unit of the user machine restarts is: the user machine sends an inbound message every time, just restarts the heartbeat message timing The inbound messages include heartbeat messages and non-heartbeat messages; when the heartbeat message timer unit times out, the user machine sends a heartbeat message and restarts the heartbeat message timer; or the user machine restarts the heartbeat message every time it sends a heartbeat message timer unit. 6.根据权利要求4所述的卫星移动通信系统心跳消息的实现方法,其特征在于:用户机的心跳消息定时器单元时长的配置方法是:地面控制中心根据实时的在线用户数目以及入站流量来配置心跳消息定时器单元的时长,并定期地通过出站链路将更新的心跳消息定时器单元时长广播给所有用户机;或者地面控制中心定期向所有用户广播当前系统入站流量或入站负荷情况,用户机根据预先设置好的系统入站流量或负荷情况和心跳消息定时器时长的对应关系,确定当前心跳消息定时器的时长。6. the method for realizing the heartbeat message of the satellite mobile communication system according to claim 4 is characterized in that: the configuration method of the heartbeat message timer unit duration of the user machine is: the ground control center according to the number of real-time online users and the inbound flow To configure the duration of the heartbeat message timer unit, and periodically broadcast the updated heartbeat message timer unit duration to all user machines through the outbound link; or the ground control center periodically broadcasts the current system inbound traffic or inbound flow to all users Load condition, the user machine determines the duration of the current heartbeat message timer according to the preset corresponding relationship between the system inbound flow or load condition and the duration of the heartbeat message timer. 7.根据权利要求4所述的卫星移动通信系统心跳消息的实现方法,其特征在于:用户机的出站信号质量测量单元实时接收和测量各个出站波束的信号平均功率水平<Pi>和信号质量,信号质量用载噪比<CNRi>或信噪比<SNRi>来表示;若用户机接收到的信号质量最好的出站波束与当前服务波束的信号质量相比,高于规定的阈值Threshold,即满足下式:7. the method for realizing the heartbeat message of the satellite mobile communication system according to claim 4 is characterized in that: the outbound signal quality measurement unit of the user machine receives and measures the signal average power level <P i > and the signal average power level of each outbound beam in real time Signal quality, signal quality is represented by carrier-to-noise ratio <CNR i > or signal-to-noise ratio <SNR i >; if the outbound beam with the best signal quality received by the user machine is higher than the signal quality of the current service beam The specified threshold Threshold satisfies the following formula: <SNR非服务波束,i>-<SNR服务波束>>Threshold<SNR non-serving beam,i >-<SNR serving beam >>Threshold 那么当前服务波束将切换到新的信号质量最好的出站波束上。Then the current serving beam will be switched to the new outbound beam with the best signal quality. 8.根据权利要求2所述的卫星移动通信系统心跳消息的实现方法,其特征在于:地面控制中心通过计算心跳信号质量,得到用户机发射功率的调整量,并决定是否将功率调整量反馈给相应用户机,具体方法为:8. the method for realizing the heartbeat message of the satellite mobile communication system according to claim 2, is characterized in that: the ground control center obtains the adjustment amount of user machine transmission power by calculating the heartbeat signal quality, and decides whether to feed back the power adjustment amount to The corresponding user machine, the specific method is: 步骤201:地面控制中心计算入站心跳消息对应的载噪比CNR真实或者信噪比SNR真实,并与目标载噪比CNR目标或者目标信噪比SNR目标进行比较,两者差异即为用户机发射功率调整量ΔP:Step 201: The ground control center calculates the carrier-to-noise ratio CNR true or signal-to-noise ratio SNR true corresponding to the inbound heartbeat message, and compares it with the target carrier-to-noise ratio CNR target or target signal-to-noise ratio SNR target , and the difference between the two is the user machine Transmit power adjustment ΔP: ΔP=CNR目标–CNR真实 ΔP = CNR target – CNR true 或者,ΔP=SNR目标–SNR真实 Alternatively, ΔP = SNR Target – SNR True ΔP为正数,表示用户机需增加发射功率,ΔP为负数则表示用户机需降低发射功率;ΔP is a positive number, which means that the user machine needs to increase the transmission power, and ΔP is a negative number, which means that the user machine needs to reduce the transmission power; 步骤202:地面控制中心根据当前出站信道资源以及ΔP的大小决定是否给相应用户机反馈发射功率调整量;Step 202: The ground control center decides whether to feed back the transmission power adjustment amount to the corresponding user machine according to the current outbound channel resource and the size of ΔP; 若ΔP的绝对值低于阈值M,即|ΔP|≤M,地面控制中心不反馈相应用户机的发射功率调整量;若|ΔP|>M,地面控制中心按设定的量化精度发送调整量。If the absolute value of ΔP is lower than the threshold M, that is, |ΔP|≤M, the ground control center will not feed back the adjustment amount of the transmission power of the corresponding user machine; if |ΔP|>M, the ground control center will send the adjustment amount according to the set quantization accuracy .
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