CN102752716B - Link selecting method and device - Google Patents
Link selecting method and device Download PDFInfo
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- CN102752716B CN102752716B CN201210243772.9A CN201210243772A CN102752716B CN 102752716 B CN102752716 B CN 102752716B CN 201210243772 A CN201210243772 A CN 201210243772A CN 102752716 B CN102752716 B CN 102752716B
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Abstract
The invention discloses a link selecting method and a device, wherein a link condition that a terminal has is analyzed according to the terminal characteristics and geographic locations of the terminal; the service type is analyzed; and the quantity of the service data is analyzed; a satellite navigation link is used preferentially for the geographic location; if the condition is not met, a ground communication link is selected preferentially; if the ground communication link condition is not met, a satellite communication link is selected; the ground communication link is selected preferentially for the non-location information; if the ground communication link condition is not met and the data quantity is small, the satellite navigation link is used; if the conditions are all not met, the satellite communication link is used. With the adoption of the link selecting method and the device, different links can be selected according to different requirement conditions and system scales; the system resource is utilized effectively; the system capacity is improved; and the user service quality (QoS) can be met.
Description
Technical field
The present invention relates to a kind of link selecting method based on multiple network fusion and device.
Background technology
Nowadays, heterogeneous networks merges mutually, and wireless network and fixed network merge, ground network and satellite network fusion etc., have become a kind of future developing trend, have received increasing concern.Along with the continuous maturation in multi-network fusion technology and market, the solution that many nets merge covers the every field such as personal communication, Enterprise Special Network, army's battlefield communication guarantee, emergency communication.Below for logistics, introduce the importance that many nets merge link selection.
The existing logistics transportation information platform based on Satellite Navigation Technique mainly provides the services such as locating and monitoring, warning, specification driving, function singleness, does not support the total factor (people, car, goods, traffic, weather etc.) of production run process, overall process (in advance, in thing, afterwards, emergent etc.), the informationization of comprehensive (Logistics Oriented process each side), intelligent management; Do not support the Information value-added service such as " goods looked for by car ", " car looked for by goods ", maintenance, food and drink, lodging, fuel oil sale; Can not provide logistics business relevant party in the urgent need to transactional services.And these functions are traditional transport enterprise technical supports to modern resources-flow enterprises transformation necessity.Satellite communication is by the constraint of geographical environment and distance, and it is point-to-multipoint, point covers advantage to ground, face and mobility flexibly, makes satellite communication have obvious advantage in the field of communications, but based on the logistics transportation of communication technology of satellite, cost is higher.Therefore, according to the difference of region, demand, select terrestrial communication link, satellite navigation link or satellite communication link to realize logistics transportation, have greater advantage.Along with the development of logistic industry, traditional logistics, to modern logistics evolution, to the fusion of heterogeneous networks, is had higher requirement.
The link establishing method generally adopted both at home and abroad at present mainly contains three classes: a kind of is the method setting up link based on terrestrial communication networks; A kind of is the method setting up link based on GPS; A kind of is the method setting up link based on ground communication and GPS.When ground communication and GPS link exist simultaneously, system lacks unified planning to two links and coordination.In existing link establishing method, adopt single link to realize communication or navigation, when adopting terrestrial communication link to realize communicating and navigating with satellite navigation link, system resource does not have unified planning, and can not make full use of system resource, power system capacity is limited.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of link selecting method and device are provided, the method and device can for different conditions of demand and system scales, select different links, effectively utilize system resource, improve power system capacity, and meet QoS of customer (QoS).
The object of the invention is to be achieved by following technical solution:
A kind of link selecting method, comprises the steps:
(1) link condition that each terminal of geolocation analysis residing for terminal feature and terminal possesses;
(2) analyze type of service, type of service comprises positional information and non-position information,
(3) link selection is carried out according to the link condition determined and type of service, concrete grammar is as follows: for positional information, preferential use satellite navigation link, if do not possessed satellite navigation link, then prioritizing selection terrestrial communication link, if do not possessed terrestrial communication link, then select satellite communication link; For non-position information, preferentially use terrestrial communication link, if do not possessed terrestrial communication link, then judge data volume size and whether possess satellite navigation link, if data volume is less and possess satellite navigation link, then use satellite navigation link; Otherwise use satellite communication link.
When selecting satellite communication link, first judging that whether satellite communication link resource is sufficient, when satellite communication link inadequate resource, readjusting satellite communication link resource according to terminal PRI, service priority.
Satellite navigation link is Beidou satellite navigation link.
A kind of link selection device, is characterized in that comprising link condition analysis module, type of service analysis module and control module;
The link condition that the geolocation analysis terminal of link condition analysis module residing for terminal feature and terminal possesses;
Type of service analysis module is used for analyzing type of service, and analyzes business datum amount size;
Control module carries out link selection according to the output of type of service analysis module and link condition analysis module, for positional information, preferential use satellite navigation link, if do not possessed satellite navigation link, then prioritizing selection terrestrial communication link, if do not possessed terrestrial communication link, then select satellite communication link; For non-position information, preferentially use terrestrial communication link, if do not possessed terrestrial communication link, then judge data volume size and whether possess satellite navigation link, if data volume is less and possess satellite navigation link, then use satellite navigation link; Otherwise use satellite communication link.
Also comprise satellite communication link resource analysis module, satellite communication link resource analysis module is used for taking satellite communication link resource situation to each terminal and analyzes, and judges that whether satellite communication link resource is sufficient.
The present invention's beneficial effect is compared with prior art:
(1) multilink balance policy is adopted: systematic unity planning satellite navigation link, satellite communication link and terrestrial communication link resource, give full play to the pluses and minuses of each means of communication, when certain link can not meet system requirements, dispatch other link circuit resource, to make full use of system resource, improve service quality, capacity.
(2) multilevel precedence strategy: link selection priority is because of situations such as type of service, geographical position, current system resource, terminal PRIs, and synthetic setting priority, chooses concrete link.
Accompanying drawing explanation
Fig. 1 is link selection device schematic diagram of the present invention;
Fig. 2 is the flow chart of link selecting method of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described in detail.
Link selecting method of the present invention and device need the resource making full use of terrestrial communication link, satellite navigation link and satellite communication link, so that system supports more multiple terminals, thus realize modern logistics fast.
Be link selection device schematic diagram of the present invention as shown in Figure 1, (a) link condition analysis module is used for the link condition possessed according to terminal feature and particular geographic location analysing terminal.B () type of service analysis module is for analyzing concrete type of service and data volume size etc.C () satellite communication link resource analysis module is used for considering each terminal and takies satellite communication link resource situation, judge that whether satellite communication link resource is sufficient.D () control module is responsible for whole link selection process.
Terrestrial communication link comprises landline network, terrestrial wireless network etc.Satellite navigation link is Beidou satellite navigation system etc., but needs according to different system actual conditions, carries out suitability amendment.
Be link selection flow chart of the present invention as shown in Figure 2, the method for link selection of the present invention comprises the steps: as seen from Figure 2
(1) obtain each terminal links information, namely link condition analysis module is according to terminal feature and particular geographic location, analyzes each terminal and whether supports the information such as terrestrial communication link, satellite navigation link, satellite communication link.
Wherein terminal feature comprises the communication module that terminal configures.Such as, some terminal configuration ground communication module, satellite navigation module and satellite communication module; And some terminal is only configured with ground communication module and satellite navigation module.According to the terminal feature prestored, service platform judges whether each terminal supports terrestrial communication link, satellite navigation link, satellite communication link.Terminal region does not likely have ground communication signal (as the region that mountain area, the ground network such as external do not cover).First service platform obtains the geographical position residing for terminal, and the geographical position then residing for terminal judges whether whether this terminal supports terrestrial communication link.
(2) type of service is judged, judgement is positional information, or out of Memory (as goods information, repair message etc.), analyzes data volume size simultaneously, namely judge it is positional information or out of Memory by type of service analysis module, and the size of data volume is judged.
Positional information is the particular geographic location of terminal; Out of Memory comprises the running status, driver fatigue state etc. of goods information, vehicle.
(3) if positional information, then enter step (4), otherwise enter step (7).
(4) judge whether terminal possesses satellite navigation link, enter step (5) if possessed, otherwise enter step (6).
(5) select satellite navigation link, send positional information by the short message function of Beidou satellite navigation system, enter step (15).
(6) prioritizing selection terrestrial communication link, if do not possess terrestrial communication link, then judges whether satellite communication link satisfies the requirements, if satisfied the requirements and resource abundance, selects satellite communication link, enter step (15); If satellite communication link does not satisfy the requirements, enter step (15); If satisfied the requirements, still resource is inadequate, according to terminal PRI, service priority, adjustresources, selects satellite communication link, enters step (15).
(7) judge whether terminal possesses terrestrial communication link, enter step (8) if possessed, otherwise enter step (9).
(8) select terrestrial communication link, enter step (15).
(9) if data volume less (judged result according to step (2)), and satellite navigation link satisfies the requirements, then enter step (10), otherwise enters step (11).
(10) select satellite navigation link, send positional information by the short message function of Beidou satellite navigation system, enter step (15).
(11) judge whether terminal possesses satellite communication link, if do not possessed, then enter step (15), otherwise enter step (12).
(12) judge that whether satellite communication link resource is sufficient by satellite communication link resource analysis module, if abundance, enter step (13), otherwise enter step (14).
(13) select satellite communication link, enter step (15).
(14) according to terminal PRI, service priority, adjustment satellite communication link resource, selects satellite communication link, enters step (15).
The priority of each terminal sets according to actual conditions.For abnormal information, its service priority is high; For goods information, its service priority is low.According to current online terminal situation, redistribute satellite communication link resource, to meet the higher request of priority.
(15) this link selection is terminated.
After completing above-mentioned steps, system enters new infomation detection, namely again detects and whether has new terminal information transfer request.
For logistics, above-mentioned link selection process is described.Suppose there is M logistics vehicles at Xinjiang region transporting cargo, there is N logistics vehicles at Shanghai transporting cargo, there is L car at Xi'an transporting cargo, wherein each car has intelligent terminal (assuming that each terminal has satellite navigation link module, satellite communication link module and terrestrial communication link module, but consider actual cost, can according to circumstances, reduce individual modules, if any terminal only comprise satellite navigation link module etc.).
(1) each terminal links information is obtained: service platform obtains the information of each terminal (as this vehicle main activities place of certain period from database, each terminal links information is tentatively judged by place, suppose that the vehicle being in Xinjiang region does not possess terrestrial communication link, the vehicle being in Xi'an and Shanghai possesses terrestrial communication link, satellite navigation link and satellite communication link);
(2) judge type of service: according to user's request, service platform judges type of service (needing to understand the information such as the particular location of certain vehicle, local information of freight source or new transportation demand as user);
(3) if vehicle position information, then enter step (4), otherwise enter step (7).
(4) judge whether terminal possesses satellite navigation link (according in step 1, the database information of service platform judges), enters step (5), otherwise enter step (6) if possessed.
(5) select satellite navigation link, enter step (15).
(6) prioritizing selection terrestrial communication link, if do not possess terrestrial communication link, then selects satellite communication link, enters step (15).
(7) judge whether terminal possesses terrestrial communication link (according in step 1, the database information of service platform judges), namely judged by link condition analysis module, enter step (8) if possessed, otherwise enter step (9).
(8) select terrestrial communication link, enter step (15).
(9) if data volume is less (according to the judged result of step (2), data volume is no more than the data volume restriction that satellite navigation link can transmit), and satellite navigation link satisfies the requirements (being judged by link condition analysis module), then enter step (10), otherwise enter step (11).
(10) select satellite navigation link, enter step (15).
(11) judge whether terminal possesses satellite communication link (being judged by link condition analysis module), if do not possessed, then enter step (15), otherwise enter step (12).
(12) satellite communication link resource whether sufficient (being judged by satellite communication link resource analysis module) is judged, if sufficient (satellite communication link has enough resources to use), enters step (13), otherwise enters step (14).
(13) select satellite communication link, enter step (15).
(14) according to terminal PRI, service priority, adjustresources (as satellite communication link resource adjusted, priority allocation is to the terminal of high priority), selects satellite communication link, enters step (15).
(15) this link selection is terminated.
In a word, the present invention can support multiple intelligent terminal (millions of) fast and service platform set up link, by each link circuit resource of unified planning, effectively utilize system resource, meet the quick position to terminal and the requirement communicated, improve logistic efficiency, and ensure the service quality of whole system to greatest extent.
Unified planning satellite navigation link of the present invention, satellite communication link and terrestrial communication link resource, especially when the continuous dilatation of modern logistics systems, the method can solve the problem of the timely access network of great amount of terminals.
Claims (2)
1. a link selecting method, is characterized in that, comprises the steps:
(1) link condition that each terminal of geolocation analysis residing for terminal feature and terminal possesses;
(2) analyze type of service, type of service comprises positional information and non-position information; Described positional information is the particular geographic location of terminal; Described non-position information is goods information, the running status of vehicle or driver fatigue state;
(3) carry out link selection according to the link condition determined and type of service, concrete grammar is as follows:
For positional information, preferential use satellite navigation link, described satellite navigation link is Beidou satellite navigation link, sends positional information by the short message function of Beidou satellite navigation link; If do not possessed satellite navigation link, then prioritizing selection terrestrial communication link sends positional information, if do not possessed terrestrial communication link, then selects satellite communication link to send positional information;
For non-position information, preferential use terrestrial communication link sends, if do not possessed terrestrial communication link, then judge data volume size and whether possess satellite navigation link, if data volume is less and possess satellite navigation link, then use satellite navigation link, send non-position information by the short message function of Beidou satellite navigation link; Otherwise select satellite communication link to send non-position information;
When selecting satellite communication link, first judging that whether satellite communication link resource is sufficient, when satellite communication link inadequate resource, readjusting satellite communication link resource according to terminal PRI, service priority.
2. a link selection device, is characterized in that comprising link condition analysis module, type of service analysis module, satellite communication link resource analysis module and control module;
The link condition that the geolocation analysis terminal of link condition analysis module residing for terminal feature and terminal possesses;
Type of service analysis module is used for analyzing type of service, and analyzes business datum amount size; Type of service comprises positional information and non-position information; Described positional information is the particular geographic location of terminal; Described non-position information is goods information, the running status of vehicle or driver fatigue state;
Satellite communication link resource analysis module is used for taking satellite communication link resource situation to each terminal and analyzes, and judges that whether satellite communication link resource is sufficient;
Control module carries out link selection according to the output of type of service analysis module, link condition analysis module and satellite communication link resource analysis module;
For positional information, preferential use satellite navigation link, described satellite navigation link is Beidou satellite navigation link, sends positional information by the short message function of Beidou satellite navigation link; If do not possessed satellite navigation link, then prioritizing selection terrestrial communication link sends positional information, if do not possessed terrestrial communication link, then selects satellite communication link to send positional information;
For non-position information, preferential use terrestrial communication link sends, if do not possessed terrestrial communication link, then judge data volume size and whether possess satellite navigation link, if data volume is less and possess satellite navigation link, then use satellite navigation link, send non-position information by the short message function of Beidou satellite navigation link; Otherwise select satellite communication link to send non-position information;
When selecting satellite communication link, first judging that whether satellite communication link resource is sufficient, when satellite communication link inadequate resource, readjusting satellite communication link resource according to terminal PRI, service priority.
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