CN102572385B - The transmission method of vision signal, wireless video server and video monitoring system - Google Patents
The transmission method of vision signal, wireless video server and video monitoring system Download PDFInfo
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- CN102572385B CN102572385B CN201110022262.4A CN201110022262A CN102572385B CN 102572385 B CN102572385 B CN 102572385B CN 201110022262 A CN201110022262 A CN 201110022262A CN 102572385 B CN102572385 B CN 102572385B
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Abstract
The invention discloses a kind of transmission method of vision signal, wireless video server and video monitoring system.Wherein, the method comprises and the error rate of the transmission of video received and error rate threshold value being compared; If the error rate of transmission of video higher than error rate threshold value, then switches to 3G network, realize transmission of video by 3G network; If the error rate of transmission of video is lower than the number of times of error rate threshold value higher than pre-determined number in the given time, then switches back LMDS system, realize transmission of video by LMDS system.The present invention realizes taking over seamlessly of LMDS microwave transmission network and 3G network by the video signal quality of in real time monitoring LMDS microwave transmission, ensure that the transmission quality of vision signal, improves stability and the reliability of video signal transmission to a great extent.
Description
Technical field
The present invention relates to monitoring technique field, especially, relate to a kind of transmission method of vision signal, wireless video server and video monitoring system.
Background technology
At present, Local Multipoint Distribution System (Local Multipoint Distribution Services, LMDS) Microwave transmission technology adopted obtains a wide range of applications, it is operated in frequency range near 28GHz, utilizes the broadband character of LMDS can realize the information such as transmitted in both directions speech, data and image in nearer distance.Except broadband character, LMDS also has the intrinsic advantage of wireless system, and such as, construction cost is low, project initiation is fast, the construction period is short and maintenance cost is low etc.
But inventor notices, when sleety weather occurs, use existing LMDS Microwave transmission technology can not ensure, with higher mass transport vision signal, to reduce stability and the reliability of video monitoring.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of transmission method of vision signal, wireless video server and video monitoring system, can improve the quality of video monitoring.
According to an aspect of the present invention, propose a kind of transmission method of vision signal, comprise and the error rate of the transmission of video received and error rate threshold value are compared; If the error rate of transmission of video higher than error rate threshold value, then switches to 3G network, realize transmission of video by 3G network; If the error rate of transmission of video is lower than the number of times of error rate threshold value higher than pre-determined number in the given time, then switches back LMDS system, realize transmission of video by LMDS system.
According to an embodiment of the inventive method, error rate threshold value is 1 × 10
-9.
According to another embodiment of the inventive method, the method also comprises the PN code of test and monitoring point place Base Transmitter; The sector at place, control point is determined according to the PN code detected; Carry out carrier wave dilatation to sector, place, control point, carrier wave dilatation gone out is set to white list special carrier; User corresponding to control point is set to white list user, and controls white list number of users that each white list special carrier carries, to guarantee the uplink transmission rate of the vision signal gathered from each control point.
According to the another embodiment of the inventive method, the frequency of the carrier wave that institute's dilatation goes out is that existing network has frequency or nonstandard frequency.
According to an embodiment again of the inventive method, when the step realizing transmission of video by 3G network is included in network side active inquiry vision signal, to white list user issuing page message on all frequencies under sector, place, control point; White list user after receiving the paging message, from the arbitrary frequency access 3G network in all frequencies sector, place, when white list user accesses 3G network from the special frequency of non-white list, preferentially white list user is assigned on the special frequency of white list, if there is no the special frequency of white list or the special frequency of white list not access under sector, place, then white list user is assigned on the common frequency under sector, place.
According to an embodiment again of the inventive method, the step realizing transmission of video by 3G network also comprises the grade according to white list user, preferentially carries out Abis scheduling to white list user.
According to a further aspect in the invention, also proposed a kind of wireless video server, comprise error rate judge module, for the error rate of the transmission of video received and error rate threshold value are compared; Handover module, be connected with error rate judge module, switch to 3G network for the error rate at transmission of video higher than during error rate threshold value, and the error rate of transmission of video in the given time lower than the number of times of error rate threshold value higher than switching back LMDS system during pre-determined number; Wireless module, is connected with handover module, for when switching to 3G network by 3G network transmission video signal.
According to an embodiment of wireless video server of the present invention, error rate threshold value is 1 × 10
-9.
According to another embodiment of wireless video server of the present invention, this server also comprises detection module, is connected with wireless module, for the PN code of test and monitoring point place Base Transmitter, determines the sector at place, control point according to the PN code detected; Module is set, be connected with detection module, for carrying out carrier wave dilatation to sector, place, control point, carrier wave dilatation gone out is set to white list special carrier, user corresponding to control point is set to white list user, and control white list number of users that each white list special carrier carries, to guarantee the uplink transmission rate of the vision signal gathered from each control point.
According to another aspect of the invention, also proposed a kind of video monitoring system, comprise the wireless video server in signal collecting device, LMDS remote equipment, base station, video monitoring platform and previous embodiment, wherein, signal collecting device is connected with wireless video server, wireless video server is intercomed mutually by 3G network and base station, wireless video server is connected with LMDS remote equipment by wired mode, LMDS remote equipment is intercomed mutually by microwave mode and base station, and base station is connected to video monitoring platform.
An embodiment of system according to the invention, this system also comprises client, and client is by internet access video monitoring platform.
The transmission method of vision signal provided by the invention, wireless video server and video monitoring system, taking over seamlessly of LMDS microwave transmission network and 3G network is realized by the video signal quality monitoring LMDS microwave transmission in real time, ensure that the transmission quality of vision signal, improve stability and the reliability of video signal transmission to a great extent.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of an embodiment of the inventive method.
Fig. 2 is the schematic flow sheet of another embodiment of the inventive method.
Fig. 3 is the schematic diagram that the special frequency of white list adopts an example of nonstandard frequency.
Fig. 4 is that the special frequency of white list adopts existing network to have the schematic diagram of an example of frequency.
Fig. 5 is the schematic diagram of an example of white list networking.
Fig. 6 is the structural representation of an embodiment of wireless video server of the present invention.
Fig. 7 is the structural representation of another embodiment of wireless video server of the present invention.
Fig. 8 is the structural representation of an embodiment of video monitoring system of the present invention.
Fig. 9 is the structural representation of another embodiment of video monitoring system of the present invention.
Figure 10 is the structural representation of the another embodiment of video monitoring system of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Exemplary embodiment of the present invention and explanation thereof for explaining the present invention, but do not form inappropriate limitation of the present invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
The complete upgrading of China Telecom CDMA2000-EVDO network, 3G network commercialization will be in full swing.China Telecom's " global eyes " project adds " mobile global eye " project construction on original fixed network platform base." mobile global eye " mainly relies on LMDS microwave transmission network and China Telecom EVDO network as the video monitoring operation platform transmitted, user can utilize various terminal by the form access global eyes platform of online access, checks video monitoring picture with remote mode.
Fig. 1 is the schematic flow sheet of an embodiment of the inventive method.
As shown in Figure 1, this embodiment can comprise the following steps:
S102, receive the error rate of the transmission of video measured by network side, the error rate of the transmission of video received and error rate threshold value are compared, wherein, this error rate threshold value can be 1 × 10
-9;
S104, if the error rate of transmission of video is higher than error rate threshold value, mean that the transmission quality of presently used LMDS system is poor, then automatically switch to 3G network, realize transmission of video by 3G network, such as, can after wireless video server receive the vision signal of collection, periodically to network side uploaded videos signal, in addition, when network side needs real-time query, also wireless video server uploaded videos signal can be required by beep-page message;
S106, if in the given time the error rate of transmission of video lower than the number of times of error rate threshold value higher than pre-determined number, then switch back LMDS system, realize transmission of video by LMDS system.
Illustrate, wireless video server by the error rate of real-time reception transmission of video, when the error rate reaches or higher than 1 × 10
-9time, automatically switch to 3G network transmission, when the error rate is less than 1 × 10
-9in time, switches back LMDS system to transmit again, wireless video server adjusts error rate monitoring period automatically according to the number of times of pingpang handoff in the unit interval, such as, in one minute, continuous 5 times (the concrete cycle is adjustable) detect that the error rate of LMDS system is less than 1 × 10
-9namely, transmission quality improves and keeps stable, then switch back LMDS system transfers, after systematic evaluation returns the transmission of LMDS system, special 3G carrier wave now can not distribute to other domestic consumers in its coverage, so that when LMDS system transfers quality is unstable, system successfully can switch back 3G network.This mechanism is used to also solve transition occupation problem to 3G network resource, namely, when by LMDS system transfers vision signal, 3G network only need keep signaling link, now data link can be discharged, not only save the bandwidth of wire transmission, and reduce the processing load of board to a great extent, further increase the robustness of 3G network.
This embodiment realizes taking over seamlessly of LMDS microwave transmission network and 3G network by the video signal quality of in real time monitoring LMDS microwave transmission, ensure that the transmission quality of vision signal, improves stability and the reliability of video signal transmission to a great extent.
Fig. 2 is the schematic flow sheet of another embodiment of the inventive method.
As shown in Figure 2, this embodiment can comprise the following steps:
S202, the PN code of test and monitoring point place Base Transmitter;
Particularly, wireless video server can receive the PN code of Base Transmitter, mates, detect the actual PN code of place, control point Base Transmitter according to matching result after the PN received being carried out decoding with known PN code collection;
S204, determines the sector at place, control point according to the PN code detected;
Particularly, can according to the sector at the place, mapping relations determination control point of the actual PN code that detects and PN code and sector;
S206, carrier wave dilatation is carried out to sector, place, control point, carrier wave dilatation gone out is set to white list special carrier, wherein, (namely the frequency of the carrier wave that institute's dilatation goes out can have frequency for existing network, mark frequency or the visible frequency of domestic consumer) or nonstandard frequency (that is, the sightless frequency of domestic consumer);
S208, is set to white list user by the user corresponding to control point, and controls white list number of users that each white list special carrier carries, to guarantee the uplink transmission rate of the vision signal gathered from each control point;
S210, compares the error rate of the transmission of video received and error rate threshold value, and wherein, this error rate threshold value can be 1 × 10
-9;
S212, if the error rate of transmission of video is higher than error rate threshold value, then switches to 3G network, realizes transmission of video by 3G network;
In an example, when idle condition, if for white list user distributes nonstandard frequency, then can by writing card specially for white list user, amendment sector parameters general messages guide white list user and domestic consumer separately resident, if transformation existing network has frequency as the special frequency of white list, consider system not on the special frequency of white list to domestic consumer's distributing paging, nor the special frequency of white list only resident white list user can be ensured, common frequency only has resident domestic consumer, therefore all users are recommended all to reside on common frequency in this case, ensure that white list user is linked into the special frequency of white list by the mode of preferential assignment during access, access is there is under this scene, the risk that white list user uses is affected when paging channel is congested, if therefore adopt in this way, need to analyze in advance, the access of assessment existing network, the load of paging channel, access when guaranteeing that white list user uses, paging channel can not be congested,
When network side active inquiry vision signal, in order to ensure that white list user's is perfectly safe, to white list user issuing page message on all frequencies under sector, place, control point;
White list user after receiving the paging message, from the arbitrary frequency access 3G network in all frequencies sector, place, when white list user accesses 3G network from the special frequency of non-white list, preferentially white list user is assigned on the special frequency of white list, not by the control of existing hard assignment switch, if there is no the special frequency of white list or the special frequency of white list not access (not one's own white list group or channel saturated) under sector, place, then white list user is assigned on the common frequency under sector, place;
In another example, can also according to the grade of white list user, preferentially (namely Abis is carried out to white list user, interface between BSC and BTS) scheduling, to ensure the optimum experience of white list user, not only to ensure its exclusive carrier frequency of eating dishes without rice or wine, but also the priority on transmission link will be ensured, realize performance guarantee end to end;
In a further example, for vehicle-mounted monitoring, when white list user moves, it not only from common frequency soft handover to the special frequency of white list supporting its place white list user group, can also be switched to common frequency from the special frequency of white list;
S214, if in the given time the error rate of transmission of video lower than the number of times of error rate threshold value higher than pre-determined number, then switch back LMDS system, realize transmission of video by LMDS system.
Illustrating, in order to ensure the uploading rate of vision signal, white list user and white list special carrier can be defined, guide domestic consumer and white list user separately resident, and accessing, paging and transfer of data time preferentially ensure the experience of white list user.For monitoring, user corresponding to control point can be set to white list user, carry out carrier wave dilatation to sector, place, control point, carrier wave dilatation gone out is set to white list special carrier, and the special frequency of this white list can be that to have frequency also can be nonstandard frequency to existing network.
Fig. 3 is the schematic diagram that the special frequency of white list adopts an example of nonstandard frequency.
As shown in Figure 3, No. 37 frequency is mark frequency, is configured in multiple sector, such as, with the sector corresponding to PN3, PN90, PN120, PN180; No. 119 frequency is the special frequency of white list, is configured in the sector corresponding with PN90 and PN120, specializes in white list user and uses.
Fig. 4 is that the special frequency of white list adopts existing network to have the schematic diagram of an example of frequency.
As shown in Figure 4, No. 119 frequency is the special frequency of white list, it is that existing network has frequency, is configured in the sector corresponding with PN3, PN90, PN120, PN180, and No. 119 frequency configured in wherein corresponding with PN90 and PN120 sector is specialized in white list user and used.
Fig. 5 is the schematic diagram of an example of white list networking.
As shown in Figure 5, this embodiment also supports definition white list user group, according to purposes, class of subscriber, white list user can be divided into multiple groups, for each group defines different reserved areas.No. 78 frequency (existing network has frequency) configured in the sector corresponding with PN120, PN180 can be used for the user in white list group 1; No. 119 frequency (nonstandard frequency) configured in the sector corresponding with PN90, PN120 can be used for the user in white list group 2.
This embodiment is by dilatation carrier wave, and control point, construction site 3G card user is set to white list user, dilatation carrier wave throughput 1.2Mbps is that control point 3G card user is special, the facile transport of 3-4 control point image can be supported, now, in special carrier coverage, other domestic consumers are owing to belonging to non-white list user, cannot use special carrier resource, thus ensure that image transmitting quality and the transmission rate of control point.
Fig. 6 is the structural representation of an embodiment of wireless video server of the present invention.
As shown in Figure 6, the wireless video server 10 of this embodiment can comprise:
Error rate judge module 11, for the error rate of the transmission of video received and error rate threshold value being compared, wherein, this error rate threshold value can be 1 × 10
-9;
Handover module 12, be connected with error rate judge module 11, switch to 3G network for the error rate at transmission of video higher than during error rate threshold value, and the error rate of transmission of video in the given time lower than the number of times of error rate threshold value higher than switching back LMDS system during pre-determined number;
Wireless module 13, be connected with handover module 12, for when switching to 3G network by 3G network transmission video signal, such as, 1 3G card of surfing Internet can be installed in wireless video server, be connected to video monitoring platform by 3G network, realize the transmission of vision signal, 1 3G card of surfing Internet can provide up maximum 1.8Mbps, the speed of descending maximum 3.1Mbps.
In this embodiment, wireless video signal can be transmitted by two-way, give tacit consent to first-selected LMDS point-to-multipoint transmission system, when affecting when declining by rain and cause transmission quality to decline, wireless video server automatically switches to 3G transmission network, the superior bandwidth sum downstream transmission rate guarantee of this network reliability and stability of wireless network.
Fig. 7 is the structural representation of another embodiment of wireless video server of the present invention.
As shown in Figure 7, compared with the embodiment in Fig. 6, the wireless video server 20 of this embodiment can also comprise:
Detection module 21, is connected with wireless module 13, for the PN code of test and monitoring point place Base Transmitter, determines the sector at place, control point according to the PN code detected;
Module 22 is set, be connected with detection module 21, for carrying out carrier wave dilatation to sector, place, control point, carrier wave dilatation gone out is set to white list special carrier, user corresponding to control point is set to white list user, and control white list number of users that each white list special carrier carries, to guarantee the uplink transmission rate of the vision signal gathered from each control point.
This embodiment introduces white list mechanism, realizes the special of 3G carrier wave, to guarantee that the uplink transmission rate of each control point can reach system requirements.
Fig. 8 is the structural representation of an embodiment of video monitoring system of the present invention.
As shown in Figure 8, the video monitoring system 30 of this embodiment can comprise signal collecting device 31, LMDS remote equipment 32, base station 33, wireless video server 10 in video monitoring platform 34 and previous embodiment, wherein, signal collecting device 31 is connected with wireless video server 10, wireless video server 10 is intercomed by 3G network and base station 33 phase, wireless video server 10 is connected with LMDS remote equipment 32 by wired mode, LMDS remote equipment 32 is intercomed with base station 33 phase by LMDS network with microwave mode, base station 33 is connected to video monitoring platform 34.
Wireless video server in this embodiment connects LMDS remote equipment, by microwave system uploaded videos signal, speed can support 1.2kbps-155Mbps, the situation of the transmission performance decline caused due to rainfall, dense fog, snowfall etc. can be run into when bad weather, the error rate of wireless video server real-time reception link transmission, when the error rate reaches 1 × 10
-9time, automatically switch to 3G network transmission, to ensure stability and the reliability of video signal transmission.
Fig. 9 is the structural representation of another embodiment of video monitoring system of the present invention.
As shown in Figure 9, compared with the embodiment in Fig. 8, the video monitoring system 40 of this embodiment can also comprise client 41, and this client 41 is by internet access video monitoring platform 34, and wherein, this client can be fixed terminal or mobile terminal.
This embodiment is the mode that monitor staff provides multiple accessing video monitor supervision platform.
Figure 10 is the structural representation of the another embodiment of video monitoring system of the present invention.
As shown in Figure 10, the head end video collecting part of this supervisory control system can comprise video collector (camera gun, ball machine), wireless video server (being built-in with video encoder and router etc.), the network carried is LMDS point-to-multipoint transmission system and 3G network, monitor supervision platform is mobile global eye monitoring platform, client is mobile intelligent terminal, the network terminal etc., administrative staff can by all control point of the display monitoring at general headquarters' video monitoring center, in addition, also can be monitored in real time administered head end video image by the mobile terminal of any accessing Internet.
Although be described in detail specific embodiments more of the present invention by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (11)
1. a transmission method for vision signal, is characterized in that, comprising:
The error rate of the transmission of video of the Local Multipoint Distribution System LMDS system received and error rate threshold value compare by wireless video server; Wherein, described LMDS system adopts Microwave transmission technology;
If the error rate of described transmission of video higher than described error rate threshold value, then switches to 3G network, realizes transmission of video by 3G network;
If the error rate of the transmission of video of LMDS system is lower than the number of times of described error rate threshold value higher than pre-determined number in the given time, then switches back LMDS system, realize transmission of video by described LMDS system.
2. method according to claim 1, is characterized in that, described error rate threshold value is 1 × 10
-9.
3. method according to claim 1, is characterized in that, described method also comprises:
The PN code of test and monitoring point place Base Transmitter;
The sector at place, described control point is determined according to the PN code detected;
Carry out carrier wave dilatation to sector, place, described control point, carrier wave dilatation gone out is set to white list special carrier;
User corresponding to control point is set to white list user, and controls white list number of users that each white list special carrier carries, to guarantee the uplink transmission rate of the vision signal gathered from each control point.
4. method according to claim 3, is characterized in that, the frequency of the carrier wave that institute's dilatation goes out is that existing network has frequency or nonstandard frequency.
5. method according to claim 3, is characterized in that, the described step realizing transmission of video by 3G network comprises:
Described in network side active inquiry during vision signal, to described white list user issuing page message on all frequencies under sector, place, described control point;
Described white list user after receiving the paging message, from the arbitrary frequency access 3G network in all frequencies sector, place, when described white list user accesses 3G network from the special frequency of non-white list, preferentially described white list user is assigned on the special frequency of described white list, if there is no the special frequency of white list or the special frequency of described white list not access under sector, place, then described white list user is assigned on the common frequency under sector, place.
6. method according to claim 3, is characterized in that, the described step realizing transmission of video by 3G network also comprises:
According to the grade of described white list user, preferentially Abis scheduling is carried out to described white list user.
7. a wireless video server, is characterized in that, comprising:
Error rate judge module, compares for the error rate of the transmission of video by the Local Multipoint Distribution System LMDS received system and error rate threshold value; Wherein, described LMDS system adopts Microwave transmission technology;
Handover module, be connected with described error rate judge module, switch to 3G network for the error rate at described transmission of video higher than during described error rate threshold value, and the error rate of the transmission of video of LMDS system in the given time lower than the number of times of described error rate threshold value higher than switching back LMDS system during pre-determined number;
Wireless module, is connected with described handover module, for when switching to 3G network by described 3G network transmission video signal.
8. server according to claim 7, is characterized in that, described error rate threshold value is 1 × 10
-9.
9. server according to claim 7, is characterized in that, described server also comprises:
Detection module, is connected with described wireless module, for the PN code of test and monitoring point place Base Transmitter, determines the sector at place, described control point according to the PN code detected;
Module is set, be connected with described detection module, for carrying out carrier wave dilatation to sector, place, described control point, carrier wave dilatation gone out is set to white list special carrier, user corresponding to control point is set to white list user, and control white list number of users that each white list special carrier carries, to guarantee the uplink transmission rate of the vision signal gathered from each control point.
10. a video monitoring system, is characterized in that, comprises signal collecting device, LMDS remote equipment, base station, video monitoring platform and the wireless video server according to any one of claim 7 to 9, wherein,
Described signal collecting device is connected with described wireless video server, described wireless video server is intercomed mutually by 3G network and described base station, described wireless video server is connected with described LMDS remote equipment by wired mode, described LMDS remote equipment is intercomed mutually by microwave mode and described base station, and described base station is connected to described video monitoring platform.
11. systems according to claim 10, is characterized in that, described system also comprises client, and described client is by video monitoring platform described in internet access.
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| CN1997232A (en) * | 2006-11-30 | 2007-07-11 | 中兴通讯股份有限公司 | A method for switching determination of the mobile multi-media broadcast terminal |
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| CN101287113A (en) * | 2008-03-05 | 2008-10-15 | 中科院嘉兴中心微系统所分中心 | Implementing method of image automatic judging and choosing in multimedia sensor network |
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| CN1788513A (en) * | 2003-06-13 | 2006-06-14 | 诺基亚公司 | Method, system, network entity, and end-user terminal for controlling a handover of a cellular terminal |
| CN1997232A (en) * | 2006-11-30 | 2007-07-11 | 中兴通讯股份有限公司 | A method for switching determination of the mobile multi-media broadcast terminal |
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