CN102594693A

CN102594693A - Flow control method of space network

Info

Publication number: CN102594693A
Application number: CN2012100551556A
Authority: CN
Inventors: 黄东
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-03-05
Filing date: 2012-03-05
Publication date: 2012-07-18
Anticipated expiration: 2032-03-05
Also published as: CN102594693B

Abstract

The invention provides a flow control method of a space network, which realizes efficient and reliable transmission of business resources in the space network by establishing corresponding flow control functional modules and algorithms for the space network.

Description

A kind of flow control methods of spatial network

Technical field

The present invention relates to wireless communication technology field, particularly relate to wireless network and Optimum Theory.

Background technology

Along with space mission constantly advances to deep space, traditional space flight measurement and control pattern can not satisfy the needs of message transmission, and the situation that point-to-point in the past transmission means is solely deposited will not exist.Interconnecting between the user's space unit, between the repeater satellite, between user's space unit and the repeater satellite becomes the inexorable trend and the requirement of space information system development; Research and construction comprise that the spatial information transmission system of ground tracking and command network, space-based TT & C network, space network and deep space tracking and command network is imperative, and the structure of spatial network is as shown in Figure 1.

Interspace interconnected (IPN) can be divided into by function: backbone network, Access Network, constellation or formation flight network, low coverage wireless network.

Backbone network is the high-speed wideband network of a responsible message transmission and distribution, mainly is made up of data relay satellite system, ground observing and controlling net, ground data net and deep space net etc.Data, telemetry intelligence (TELINT) and application data etc. are injected in the instruction of negative your the transmission user's space unit of backbone network.Guaranteeing under the prerequisite of fail safe that this network also can provide the interface with the terrestrial interconnection net.

Access Network refers to be used for space cell and the trunk network that each constitutes of establishing with information exchange that just connected.

Constellation or Small Satellite Formation Flying network refer to the to cooperate space cell of flight for example is used for the network that the inter-satellite link of swap data constitutes in constellation or the satellites formation.

In some space missions, need carry out co-ordination to dissimilar space cells, as the manned space station dock with the intersection of airship, release between Mars orbiter, orbital vehicle and the lander and docking.If rely on ground to measure and control fully, will bring great expense in the face of many space cells.The backbone network node only and between one of this task of execution or the minority principal space unit is set up link, accomplishes information exchange.And the network of between principal space unit and other space cells, setting up is referred to as the low coverage wireless network.The characteristics of this network are that operating distance is short, power hungry is low, cost is low, tear down and build conveniently, and route between interspace and data forwarding flow process are shown in Fig. 2 and 3.

Therefore be necessary to design a kind of flow control mechanism efficiently, the stable transfer of implementation space Network.

Summary of the invention

Technical problem to be solved by this invention is: the professional stable transfer problem that solves spatial network.

The present invention solves the problems of the technologies described above the flow control methods that a kind of spatial network is provided, and it is characterized in that:

A, set up the flow-control module of spatial network;

B, using system initialization module obtain the initialization condition and the service condition of spatial network system, then initialization information are sent to network capacity optimized distribution module, and acquisition spatial network capacity is stablized the condition of optimum allocation;

C, use the balanced new Business Stream of dynamic subscriber's balance point module, and the professional Control Parameter through the Business Stream adjustment network capacity optimum allocation that calculates;

D, the condition that the flow control of spatial network finishes is set.

In the said steps A, the flow-control module of spatial network by transmission time re-computation module, system initialization module, network capacity optimized distribution module, dynamic subscriber's balance point module, the check balance point whether restrains module and the punishment strategy module is formed.

Among the said step B, order

; Wherein

is penalty factor;

;

makes the point of spatial network capacity optimum allocation do

; is the capacity of direct connected link

;

is the Business Stream of link

;

is weight coefficient, and total flow process is as shown in Figure 4.

Among the said step B, the spatial network capacity is stablized the optimum allocation condition provides the optimized point set for the network capacity optimal module.Work as condition

is when satisfying; The spatial network capacity realizes stablizing optimum allocation; Wherein

is Lagrange multiplier; is spatial network capacity utilance function;

is physical link

capacity;

is the increasing function of

;

is the route set of spatial network;

is the physical link set of spatial network; And use genetic algorithm to obtain optimal solution, as shown in Figure 5.

Among the said step C; When step B accomplishes; Obtain current dynamic subscriber's equilibrium state information, divide timing, use the initialization information of current dynamic subscriber's equilibrium state information as next network capacity optimal module running status when next user is carried out network capacity.

;

is the Business Stream vector;

is the data signal vector in the network, and

is and the corresponding data signal vector of Business Stream.

Among the said step D; The condition

that flow control finishes is set; Wherein

is the time interval of professional deviated from network;

is that transmitting terminal and receiving terminal are right; is Route Distinguisher;

is transmitting terminal and the route set of receiving terminal to being used in

;

is the collection of services on the route in the time interval

;

be in the time interval the professional transmission time on the route

;

be in the time interval

transmitting terminal and receiving terminal to in all Business Streams, be in the time interval

transmitting terminal and receiving terminal to

in shortest path by transmission time.

Beneficial effect of the present invention is: a kind of flow control methods of spatial network is provided, through setting up corresponding flow control function module of spatial network and algorithm, has realized the high efficient and reliable transmission of service resources in spatial network.

Description of drawings

Fig. 1 is the structural representation of spatial network;

ground base station wherein;

is communication truck;

is mobile node, and is circumterrestrial satellite.

is the satellite around Mars;

Fig. 2 is the route sketch map between interspace;

Fig. 3 is that the business between interspace is transmitted sketch map;

Fig. 4 is total workflow sketch map;

Fig. 5 obtains the optimal solution schematic flow sheet for using genetic algorithm.

Claims

1. the flow control methods of a spatial network solves the professional stable transfer problem of spatial network, comprises the steps:

A, set up the flow-control module of spatial network;

B, system initialization module are obtained the initialization condition and the service condition of spatial network system, then initialization information are sent to network capacity optimized distribution module, and acquisition spatial network capacity is stablized the condition of optimum allocation;

D, the condition that the flow control of spatial network finishes is set.

2. according to the method for claim 1, it is characterized in that for said steps A: the flow-control module of spatial network by transmission time re-computation module, system initialization module, network capacity optimized distribution module, dynamic subscriber's balance point module, the check balance point whether restrains module and the punishment strategy module is formed.

3. according to the method for claim 1, it is characterized in that: order for said step B

; Wherein

is penalty factor;

;

makes the point of spatial network capacity optimum allocation do

;

is the capacity of direct connected link

;

is the Business Stream of link , and

is weight coefficient.

4. according to the method for claim 1, it is characterized in that for said step B: the spatial network capacity is stablized the optimum allocation condition provides the optimized point set for the network capacity optimal module, works as condition

is Lagrange multiplier;

is spatial network capacity utilance function;

is physical link

capacity;

is the increasing function of ;

is the route set of spatial network; is the physical link set of spatial network, and uses genetic algorithm to obtain optimal solution.

5. according to the method for claim 1; It is characterized in that for said step C: when step B accomplishes; Obtain current dynamic subscriber's equilibrium state information; When being carried out network capacity, next user divides timing; Use the initialization information of current dynamic subscriber's equilibrium state information as next network capacity optimal module running status;