CN104917679B - A kind of delay-tolerant network personalization routing plan selection system towards handheld mobile device - Google Patents

A kind of delay-tolerant network personalization routing plan selection system towards handheld mobile device Download PDF

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CN104917679B
CN104917679B CN201510312645.3A CN201510312645A CN104917679B CN 104917679 B CN104917679 B CN 104917679B CN 201510312645 A CN201510312645 A CN 201510312645A CN 104917679 B CN104917679 B CN 104917679B
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dtn
routing
equipment
flag
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CN104917679A (en
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吕宏武
郭宁宁
朱金美
王慧强
冯光升
郭方方
林俊宇
戴秀豪
杨爽
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Harbin Engineering University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/302—Route determination based on requested QoS
    • H04L45/308—Route determination based on user's profile, e.g. premium users
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/12—Shortest path evaluation
    • H04L45/125—Shortest path evaluation based on throughput or bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

The invention belongs to mobile network route field, and in particular to be it is a kind of towards handheld mobile device delay-tolerant network personalization routing plan selection system.The present invention includes: that the opening module of handheld mobile device receives the instruction that user opens routing function；Equipment room information exchange module is used for the information exchange of handheld mobile device and handheld mobile device；User demand collection module receives the Flag from opening module；Device resource sensing module receives the Flag from opening module；DTN method for routing obtains module and receives the Flag from opening module；DTN method for routing filtering module receives the set of the equipment room information-storing device in equipment room information exchange module and obtains the set etc. of module ROM from DTN method for routing.Handheld mobile device is communicated using optional DTN method for routing in the present invention, and application can reduce the resource overhead of handheld device, improves the delivery rate of message.

Description

Delay tolerant network personalized routing scheme selection system facing to handheld mobile equipment
Technical Field
The invention belongs to the field of mobile network routing, and particularly relates to a delay tolerant network personalized routing scheme selection system for handheld mobile equipment.
Background
In recent years, the handheld mobile equipment has the characteristics of being small and exquisite, light, convenient and fast to communicate and capable of surfing the internet anytime and anywhere, and can accompany a user all the time, so that the mobile internet is developed in a blowout mode. However, at present, the network infrastructure of partial areas is not perfect, and the method has the characteristics of intermittent connection, high delay, low delivery rate and the like. In this environment, the handheld mobile device cannot complete information transmission through the conventional network, and a "store-carry-forward" routing mode of a Delay Tolerant Network (DTN) is required to solve the communication problem in this environment. Due to the popularity of handheld mobile devices and the increase in computing and storage capabilities, hardware conditions for implementing DTN networks have been met. However, each user using a handheld mobile device has significant personalized requirements, for example, when the user has low requirements for delay, security, etc., the user prefers to adopt a simple routing scheme; when the user has a higher performance requirement, the user prefers a combination of multiple routing schemes. Therefore, in such a DTN network, the use of a certain fixed DTN routing mode has a great limitation, and cannot sufficiently meet the personalized requirements of users, and a system capable of adaptively selecting different routing schemes according to different user requirements is urgently needed.
At present, a handheld mobile device mainly adopts a determined DTN routing mode for communication, and a DTN routing scheme which can meet the personalized requirements of users is not realized. The paper "Delay Tolerant Network on android phones: Implementation Issues and Performance measures" (http:// ojs. academic lipher. com/index. php/jsw/angle/view/jsw 091027132720) realizes a DTN routing method on android phones that takes into account bandwidth and battery consumption, but does not take into account the personalized requirements of the user. An IBR-DTN routing scheme is designed in a paper "Bundle Protocol Implementation for Android Devices" (http:// dl.ac.org/location.cfm.
To sum up, although the handheld mobile device may transmit data in a fixed DTN routing mode, the fixed DTN routing mode cannot sufficiently meet personalized requirements of different users.
Disclosure of Invention
The invention aims to provide a system for personalized selection of a delay tolerant network routing scheme for a handheld mobile device for a user.
The purpose of the invention is realized as follows:
(1) a DTN starting module OM of the handheld mobile equipment N receives an instruction of starting a DTN routing function from a user and sets an equipment identifier ID for the equipment NNThe OM searches whether any handheld mobile equipment M exists in the communication range of the equipment N; if the search result is multiple devices, OM obtains the device identifier ID of the device M closest to the OMM(ii) a If only one device M is searched, OM directly obtains the device identifier ID of the device MM(ii) a OM sets Flag of state of DTN routing function to True; OM will IDMSending the information to the inter-equipment information interaction module BIM of the equipment N, and marking the state of the DTN routing functionThe bit Flag is sent to the DTN routing method acquisition module ROM, the equipment resource perception module TM and the user demand collection module GM; if the equipment is not searched, the mobile equipment N is held by the hand to perform the next round of search;
(2) the equipment-to-equipment information interaction module BIM is used for information interaction between the handheld mobile equipment N and the handheld mobile equipment M, and comprises an equipment-to-equipment information receiving interface, an equipment-to-equipment information storage and an equipment-to-equipment information sending interface:
the inter-equipment information receiving interface receives the ID from the DTN opening module OMMAnd receives the device identifier as IDMThe handheld mobile device M transmits its supported DTN routing method set c (M), wherein(ii) a ID (identity)MSending the information to an inter-device information sending interface, and sending C (M) to a DTN routing method Filtering Module (FM);
the inter-equipment information sending interface receives the routing scheme SP from the DTN routing scheme selection module SM in the handheld mobile equipment N and sends the routing scheme SP to the equipment with the mark IDMIn the handheld mobile device M;
(3) the user demand collection module GM receives the Flag from the DTN starting module OM, if the Flag is True, the user demand is collected, the user demand is analyzed into a demand binary group, namely a demand name and a demand content, and then the binary group is sent to the DTN routing scheme selection module SM;
(4) the device resource sensing module TM receives the Flag from the DTN start module OM, and if the Flag is True, acquires the resource condition of the handheld mobile device N, and resolves the resource condition into a resource binary group, i.e., an idle value of the CPU processor and an idle value of the memory, and sends the binary group to the DTN routing scheme selection module SM;
(5) a DTN routing method obtaining module ROM receives the Flag from the DTN starting module OM, and if the Flag is True, obtains a set c (n) of DTN routing methods supported by the device, where the set c (n) of DTN routing methods is obtained(ii) a And send it to DTN routing method filtering module FM;
(6) the DTN routing method filtering module FM receives a set c (m) from the inter-device information memory in the inter-device information interaction module BIM and a set c (n) from the DTN routing method acquisition module ROM. Screening out a common DTN routing method set C (M & N) by solving an intersection, and sending the C (M & N) to a DTN routing scheme selection module SM;
(7) a DTN routing scheme selection module SM receives a routing method set C (M & N) from a DTN routing method filtering module FM, a resource binary group from an equipment resource perception module TM and a demand binary group from a user demand analysis module AM, screens out an optimal routing scheme SP which may be formed by combining one or more routing methods, and sends the routing scheme SP to an inter-equipment information sending interface in an execution module EM and an inter-equipment information interaction module BIM; the DTN routing scheme selection module mainly comprises a matching module and a screening module;
the matching module is used for calculating the matching condition of the requirement of the user and the performance of the DTN routing method, and the matching condition of the equipment resource idle condition and the resource consumption of the DTN routing method. Set C (M) for DTN routing methods&DTN routing method RS (j) in N), where j (0)<j≤|C(M&N)|)，|C(M&N) | represents the set C (M)&N) number of elements. Set C (M) for DTN routing methods&DTN routing method RS (j) in N), where j (0)<j≤|C(M&N)|)，|C(M&N) | represents the set C (M)&N) number of elements. Calculating the matching probability P between the bandwidth in RS (j) and the bandwidth required by the user according to the formula (1)D(j) (ii) a Wherein,
uD represents the required bandwidth value of the user, and rD represents the bandwidth value that can be provided by the DTN routing method;
calculating the matching probability P of the processor consumption value of RS (j) and the idle value of the processor of the equipmentT(j)；
Wherein fT represents a device processor idle value, rT represents a processor consumption value of rs (j);
calculating the probability P of the match between the memory consumption value of RS (j) and the memory free value of the deviceM(j)；
Wherein fM represents a memory free value of the device, rM represents a memory consumption value of RS (j);
if PD(j)∈[α,1]Storing the RS (j) into a requirement matching list (D); if PT(j)∈[β,1]Then storing RS (j) into a processor matching list T; if PM(j)∈[γ,1]Storing the RS (j) into a memory matching list M, otherwise, continuously searching other routing methods, wherein α, β and gamma are selected threshold values, and sending the list D, the processor matching list T and the list M to a screening module;
the screening module receives a requirement matching D list, a processor matching T list and a memory matching M list from the matching module, searches and checks list information, if a DTN routing method RS (j) exists in each list, the RS (j) routing method is the best routing scheme SP, the DTN routing method with the maximum matching probability value is selected from the list D, the list T and the list M respectively, the DTN routing methods selected from the lists are combined into the best routing scheme SP, and the best routing scheme SP is sent to the execution module EM and the inter-device information interaction module BIM;
(8) the execution module EM receives the routing scheme SP from the DTN routing scheme selection module SM and executes:
the implementation flow steps of the delay tolerant network personalized routing scheme selection system facing the handheld mobile equipment are as follows:
(1.1) a user starts a DTN routing function of the handheld mobile equipment N, and the starting instruction is received by a DTN starting module (OM) of the handheld mobile equipment N;
(1.2) after a DTN starting module (OM) of the handheld mobile equipment N receives a starting instruction, firstly, setting an equipment identifier ID for the equipment NN. Secondly, checking whether any handheld mobile equipment M exists in the communication range of the handheld mobile equipment N, if the search result is that a plurality of pieces of equipment exist, executing (1.3), if only one piece of equipment M is searched, executing (1.4), and if the equipment is not searched, executing the next round of search by the handheld mobile equipment N;
(1.3) OM obtains device identifier ID of nearest device MMEntering (1.5);
(1.4) OM directly acquires device identifier ID of device MMEntering (1.5);
(1.5) OM sets Flag of state of DTN routing function to True, and secondly, OM sets ID of device M to TrueMSending the Flag value True to a device-to-device information interaction module (BIM), and sending the Flag value True to a DTN routing method acquisition module ROM, a device resource perception module TM and a user demand collection module GM;
(1.6) when the inter-device information receiving interface in the inter-device information interaction module BIM receives the ID from the DTN starting module OMMThen, the receiving device identifier is IDMThe device M transmits its supported DTN routing method set C (M) and sends the IDMAnd sending the information to an inter-device information sending interface, and sending C (M) to a DTN routing method filtering module FM.
(1.7) when the DTN routing method acquisition module ROM receives the Flag from the DTN startup module OM, if the Flag is True, acquiring a DTN routing method set c (n) supported by the device, and sending the DTN routing method set c (n) to a matching module in the DTN routing method Filtering Module (FM);
(1.8) screening out a common DTN routing method set C (M & N) by an intersection by a DTN routing method filtering module FM, and sending the C (M & N) to a DTN routing scheme selecting module SM.
(1.9) the user demand collection module GM receives the Flag from the DTN startup module OM, and if the Flag is True, collects the user demand, resolves the user demand into a demand binary group, namely a demand name and a demand content, and sends the binary group to the DTN routing scheme selection module SM;
(1.10) the device resource sensing module TM receives the Flag from the DTN startup module OM, and if the Flag is True, obtains the condition of the device resource, resolves the resource condition into a resource binary group, namely an idle value of a CPU processor and an idle value of a memory, and sends the binary group to the DTN routing scheme selection module SM;
(1.11) when the matching module in the DTN routing scheme Selection Module (SM) receives the demand binary group and the set C (M) of the routing methods&N) and after resource doublet, calculating PD(j)、PT(j)、PM(j) If P isD(j)∈[α,1]Storing the RS (j) into a requirement matching list D; if PT(j)∈[β,1]Then storing RS (j) into a processor matching list T; if PM(j)∈[γ,1]Storing the RS (j) into a memory matching list M, otherwise, continuously searching other routing methods, wherein α, β and gamma are selected threshold values, and sending the list D, the processor matching list T and the list M to a screening module;
(1.12) after the screening module receives the lists sent by the matching module, searching and checking list information, and if a DTN routing method RS (j) exists in each list, taking the DTN routing method RS (j) as an optimal routing scheme SP; otherwise, selecting the DTN routing method with the maximum matching probability value from the demand matching D list, the processor matching T list and the memory matching M respectively, combining the DTN routing methods selected from the lists and synthesizing an optimal routing scheme SP; sending the optimal routing scheme SP to an execution module EM and an inter-device information sending interface in an inter-device information interaction module BIM;
(1.13) sending the received SP to the equipment by the inter-equipment information sending interface in the BIM to be marked as IDMIn the handheld mobile device M;
(1.14) the execution module EM executes the received routing scheme SP.
The invention has the beneficial effects that:
the delay tolerant network personalized routing scheme selection system facing the handheld mobile equipment is arranged on the handheld mobile equipment, can collect the requirements of users through the handheld mobile equipment, dynamically sense the resource idle condition of the handheld mobile equipment, and provide a DTN routing scheme meeting the personalized requirements of the users by utilizing a DTN routing method supported by the handheld mobile equipment. The invention can fully meet different individual requirements of users, reduce the expenditure of handheld equipment resources and maximize the delivery rate of messages.
The invention can collect the requirements of the user, sense the available resource condition of the handheld mobile equipment and select the DTN routing scheme which can meet the personalized requirements of the user. The handheld mobile equipment adopts the optional DTN routing method for communication, so that the resource overhead of the handheld equipment can be reduced and the delivery rate of the message can be improved.
Drawings
FIG. 1 is a personalized delay tolerant network routing scheme selection system for a handheld mobile device;
fig. 2 is a flow diagram of a personalized delay tolerant network routing scheme for a handheld mobile device.
Detailed Description
The invention is described in more detail below with reference to specific examples:
the invention is characterized in that the requirements of the user are known through the handheld mobile equipment, the resource idle condition of the handheld mobile equipment is sensed, and then the DTN routing scheme is dynamically selected, thereby meeting the individual requirements of the user.
The invention discloses a delay tolerant network personalized Routing scheme selection system facing a handheld mobile device, which is firstly deployed on the handheld mobile device, wherein a DTN Routing method supported by the device belongs to one or more of a DTN Routing method set (C) { Direct Contact Routing, infectious disease Routing, Location-Based Routing, utility Routing (PROPHET) And Spray waiting Routing (Spray And wait Routing) }. The user starts to operate the personalized delay tolerant network routing scheme selection system by starting the DTN function of the handheld mobile equipment, mainly relating to the existing handheld mobile equipment N of the user and any handheld mobile equipment M communicated with the handheld mobile equipment N, and specifically realizing the following steps:
(1) a DTN Opening Module (OM) of the handheld mobile equipment N receives an instruction of opening a DTN routing function by a user and sets an equipment identifier ID for the equipment NN. Further, OM searches whether any handheld mobile device M exists within the communication range of the device N. If the search result is multiple devices, OM obtains the device identifier ID of the device M closest to the OMM(ii) a If only one device M is searched, OM directly obtains the device identifier ID of the device MM. The OM sets a Flag (Flag) of the state of the DTN routing function to True. OM will IDMAnd sending the state Flag bit (Flag ═ True) of the DTN routing function to an inter-device information interaction module (BIM) of the device N, a DTN routing method acquisition module (ROM), a device resource perception module (TM) and a user demand collection module (GM). And if the equipment is not searched, the handheld mobile equipment N carries out the next round of search.
(2) The inter-device information interaction module (BIM) is mainly used for information interaction between the handheld mobile device N and the handheld mobile device M. The device comprises an inter-device information receiving interface, an inter-device information storage and an inter-device information sending interface.
① the inter-device information receiving interface receives ID from DTN start module (OM)MAnd receives the device identifier as IDMThe handheld mobile device M transmits its supported DTN routing method set c (M), wherein(ii) a ID (identity)MAnd sending the information to an inter-device information sending interface, and sending C (M) to a DTN routing method Filtering Module (FM).
② the inter-device information transmission interface receives the routing Scheme (SP) from the DTN routing scheme Selection Module (SM) in the hand-held mobile device N and sends it to the device with the IDMIn the handheld mobile device M.
(3) The user demand collection module (GM) receives the Flag from the DTN starting module (OM), if the Flag is True, the user demand is collected, the user demand is analyzed into a demand binary group (demand name and demand content), and then the binary group is sent to the DTN routing scheme Selection Module (SM).
(4) The device resource perception module (TM) receives the Flag from the DTN starting module (OM), if the Flag is equal to True, the resource situation of the handheld mobile device N is obtained, the resource situation is analyzed into resource duplets (CPU processor idle value and memory idle value), and then the duplets are sent to the DTN routing scheme Selection Module (SM).
(5) A DTN routing method acquisition module (ROM) receives the Flag from the DTN start module (OM), and if the Flag is True, the DTN routing method acquisition module acquires a DTN routing method set C (N) supported by the device, wherein the DTN routing method set C (N) is acquired by the device(ii) a And sends it to a DTN routing method Filtering Module (FM).
(6) The DTN routing method Filtering Module (FM) receives a set c (m) of inter-device information memories from the inter-device information interaction module (BIM) and a set c (n) from the DTN routing method acquisition module (ROM). And screening out a common DTN routing method set C (M & N) by solving an intersection, and sending the C (M & N) to a DTN routing scheme Selection Module (SM).
(7) A DTN routing scheme Selection Module (SM) receives a routing method set C (M & N) from a DTN routing method Filtering Module (FM), a resource binary group from a device resource perception module (TM) and a demand binary group from a user demand Analysis Module (AM), screens out an optimal routing scheme (the routing Scheme (SP) may be formed by combining one or more routing methods), and sends the routing Scheme (SP) to an Execution Module (EM) and an inter-device information sending interface in an inter-device information interaction module (BIM); the DTN routing scheme selection module mainly comprises a matching module and a screening module.
① matching module is used to calculate the matching of user's demand with the performance of DTN routing method, and the matching of device resource idle with the resource consumption of DTN routing method for DTN routing method set C (M)&DTN routing method RS (j) in N), where j (0)<j≤|C(M&N)|)，|C(M&N) | represents the set C (M)&N) number of elements. Set C (M) for DTN routing methods&DTN routing method RS (j) in N), where j (0)<j≤|C(M&N)|)，|C(M&N) | represents the set C (M)&N) number of elements. Calculating the matching probability P between the bandwidth in RS (j) and the bandwidth required by the user according to the formula (1)D(j) In that respect Wherein,
uD represents the required bandwidth value of the user, and rD represents the bandwidth value that can be provided by the DTN routing method;
calculating the matching probability P of the processor consumption value of RS (j) and the idle value of the processor of the equipment according to the formula (2)T(j)；
Where fT represents the device processor idle value and rT represents the processor consumption value of rs (j).
Calculating the matching probability P of the memory consumption value of RS (j) and the memory idle value of the equipment according to the formula (3)M(j)；
Where fM represents the memory free value of the device and rM represents the memory consumption value of RS (j).
If PD(j)∈[α,1]Storing the RS (j) into a requirement matching list (D); if PT(j)∈[β,1]Then rs (j) is stored into the processor matching list (T); if PM(j)∈[γ,1]RS (j) is stored in the memory matching list (M), otherwise, other routing methods are continuously searched, wherein α, β and gamma are selected threshold values, and the list (D), the processor matching list (T) and the list (M) are sent to the screening module.
② the screening module accepts the demand matching (D) list, processor matching (T) list, memory matching (M) list from the matching module, searches and checks the list information, if the DTN routing method RS (j) exists in each list, RS (j) routing method is the best routing Scheme (SP), otherwise, the DTN routing method with the maximum matching probability value is selected from the list (D), the list (T) and the list (M), the DTN routing method selected from each list is synthesized into the best routing Scheme (SP), and the best routing Scheme (SP) is sent to the Execution Module (EM) and the device-to-device information interaction module (BIM).
(8) The Execution Module (EM) receives the routing Scheme (SP) from the DTN routing scheme Selection Module (SM) and executes it.
The invention relates to a delay tolerant network personalized routing scheme selection system facing to a handheld mobile device, which comprises the following steps:
(1) the user turns on the DTN routing function of the handheld mobile device N. The turn-on command is received by a DTN turn-On Module (OM) of the handheld mobile device N.
(2) When a DTN Opening Module (OM) of a handheld mobile device N receives an opening instruction, firstly, a device identifier ID is set for the device NN. And secondly, checking whether any handheld mobile device M exists in the communication range of the handheld mobile device N, if the searching result is a plurality of devices, executing (3), and if only one device M is searched, executing (4). If the equipment is not searched, the handheld mobile equipment N carries out the next round of search
(3) OM obtains device identifier ID of nearest device MMAnd (5) is entered.
(4) OM directly acquires device identifier ID of device MMAnd (5) is entered.
(5) OM sets Flag of DTN routing function state to True, and second OM sets ID of device MMAnd sending the information to a device-to-device information interaction module (BIM). And sending (Flag ═ True) to a DTN routing method acquisition module (ROM), a device resource awareness module (TM) and a user demand collection module (GM).
(6) When an inter-device information receiving interface in an inter-device information interaction module (BIM) receives an ID from a DTN Opening Module (OM)MThen, the receiving device identifier is IDMThe device M transmits its supported DTN routing method set C (M) and sends the IDMAnd sending the information to an inter-device information sending interface, and sending C (M) to a DTN routing method Filtering Module (FM).
(7) When the DTN routing method acquisition module (ROM) receives the Flag from the DTN startup module (OM), if the Flag is True, the DTN routing method set c (n) supported by the device is acquired and sent to the matching module in the DTN routing method Filtering Module (FM).
(8) And the DTN routing method Filtering Module (FM) screens out a common DTN routing method set C (M & N) by solving intersection, and sends the C (M & N) to the DTN routing scheme Selecting Module (SM).
(9) The user demand collection module (GM) receives the Flag from the DTN starting module (OM), if the Flag is True, the user demand is collected, the user demand is analyzed into a demand binary group (demand name and demand content), and the binary group is sent to the DTN routing scheme Selection Module (SM).
(10) The device resource perception module (TM) receives the Flag from the DTN starting module (OM), if the Flag is equal to True, the situation of the device resource is obtained, the resource situation is analyzed into a resource binary group (a CPU processor idle value and a memory idle value), and the binary group is sent to the DTN routing scheme Selection Module (SM).
(11) When a matching module in a DTN routing scheme Selection Module (SM) receives a set C (M) of a demand binary group and a routing method&N) and resource binary, and then calculating P by using formula (1), formula (2) and formula (3)D(j)、PT(j)、PM(j) In that respect If PD(j)∈[α,1]Storing the RS (j) into a requirement matching list (D); if PT(j)∈[β,1]Then rs (j) is stored into the processor matching list (T); if PM(j)∈[γ,1]RS (j) is stored in the memory matching list (M), otherwise, other routing methods are continuously searched, wherein α, β and gamma are selected threshold values, and the list (D), the processor matching list (T) and the list (M) are sent to the screening module.
(12) And after receiving the lists sent by the matching module, the screening module searches and checks list information, and if the DTN routing method RS (j) exists in each list, the DTN routing method RS (j) is set as the optimal routing Scheme (SP). Otherwise, selecting the DTN routing method with the maximum matching probability value from the demand matching (D) list, the processor matching (T) list and the memory matching (M), and combining the DTN routing methods selected from the lists to synthesize the optimal routing Scheme (SP). And sends the optimal routing Scheme (SP) to the inter-device information sending interfaces in the Execution Module (EM) and the inter-device information interaction module (BIM).
(13) The inter-device information sending interface in the inter-device information interaction module (BIM) sends the received routing proposal (SP) to the device with the ID markMIn the handheld mobile device M.
(14) The Execution Module (EM) executes the received routing Scheme (SP).
The invention discloses a delay tolerant network personalized Routing scheme selection system facing a handheld mobile device, which is firstly deployed on the handheld mobile device, wherein a DTN Routing method supported by the device belongs to one or more of a DTN Routing method set (C) { Direct Contact Routing, infectious disease Routing, Location-Based Routing, utility Routing (PROPHET) And Spray waiting Routing (Spray And wait Routing) }. The user starts to operate the personalized delay tolerant network routing scheme selection system by starting the DTN function of the handheld mobile equipment, mainly relating to the existing handheld mobile equipment N of the user and any handheld mobile equipment M communicated with the handheld mobile equipment N, and specifically realizing the following steps:
(1) a DTN Opening Module (OM) of the handheld mobile equipment N receives an instruction of opening a DTN routing function by a user and sets an equipment identifier ID for the equipment NN. Further, OM searches whether any handheld mobile device M exists within the communication range of the device N. If the search result is multiple devices, OM will obtain the device identifier ID of the nearest device MM(ii) a If only one device M is searched, OM will directly obtain the device identifier ID of the device MM. The OM sets a Flag (Flag) of the state of the DTN routing function to True. OM will IDMAnd sending the state Flag bit (Flag ═ True) of the DTN routing function to an inter-device information interaction module (BIM) of the device N, a DTN routing method acquisition module (ROM), a device resource perception module (TM) and a user demand collection module (GM). And if the equipment is not searched, the handheld mobile equipment N carries out the next round of search.
(2) The inter-device information interaction module (BIM) is mainly used for information interaction between the handheld mobile device N and the handheld mobile device M. The device comprises an inter-device information receiving interface, an inter-device information storage and an inter-device information sending interface.
① the inter-device information receiving interface receives ID from DTN start module (OM)MAnd receives the device identifier as IDMThe handheld mobile device M conveys a set c (M) of its supported DTN routing methods, wherein(ii) a ID (identity)MAnd sending the information to an inter-device information sending interface, and sending C (M) to a DTN routing method Filtering Module (FM).
② the inter-device information transmission interface receives the routing Scheme (SP) from the DTN routing scheme Selection Module (SM) in the hand-held mobile device N and sends it to the device with the IDMIn the handheld mobile device M.
(3) The user demand collection module (GM) receives the Flag from the DTN starting module (OM), if the Flag is True, the user demand is collected, the user demand is analyzed into a demand binary group (demand name and demand content), and then the binary group is sent to the DTN routing scheme Selection Module (SM).
(4) The device resource perception module (TM) receives the Flag from the DTN starting module (OM), if the Flag is equal to True, the resource situation of the handheld mobile device N is obtained, the resource situation is analyzed into resource duplets (CPU processor idle value and memory idle value), and then the duplets are sent to the DTN routing scheme Selection Module (SM).
(5) A DTN routing method obtaining module (ROM) receives the Flag from the DTN Opening Module (OM), and if the Flag is True, the DTN routing method obtaining module obtains a DTN routing method set C (N) supported by the device, wherein the DTN routing method set C (N) is obtained by the device(ii) a And sends it to a DTN routing method Filtering Module (FM).
(6) The DTN routing method Filtering Module (FM) receives a set c (m) of inter-device information memories from the inter-device information interaction module (BIM) and a set c (n) from the DTN routing method acquisition module (ROM). And screening out a common DTN routing method set C (M & N) by solving an intersection, and sending the C (M & N) to a DTN routing scheme Selection Module (SM).
(7) A DTN routing scheme Selection Module (SM) receives a routing method set C (M & N) from a DTN routing method Filtering Module (FM), a resource binary group from a device resource perception module (TM) and a demand binary group from a user demand Analysis Module (AM), screens out an optimal routing scheme (the routing Scheme (SP) may be formed by combining one or more routing methods), and sends the routing Scheme (SP) to an Execution Module (EM) and an inter-device information sending interface in an inter-device information interaction module (BIM); the DTN routing scheme selection module mainly comprises a matching module and a screening module.
① matching module calculates matching condition of user's requirement and DTN routing method performance, and matching condition of equipment resource idle condition and DTN routing method resource consumption&DTN routing method RS (j) in N), where j (0)<j≤|C(M&N)|)，|C(M&N) | represents the set C (M)&N) number of elements. Set C (M) for DTN routing methods&DTN routing method RS (j) in N), where j (0)<j≤|C(M&N)|)，|C(M&N) | represents the set C (M)&N) of the DTN routing method set C (M) for the DTN routing method set, ① the matching module calculates the matching of the user's demand with the performance of the DTN routing method, and the matching of the device resource idle with the resource consumption of the DTN routing method&DTN routing method RS (j) in N), where j (0)<j≤|C(M&N)|)，|C(M&N) | represents the set C (M)&N) number of elements. Set C (M) for DTN routing methods&DTN routing method RS (j) in N), where j (0)<j≤|C(M&N)|)，|C(M&N) | represents the set C (M)&N) number of elements. Calculating the matching probability P between the bandwidth in RS (j) and the bandwidth required by the user according to the formula (1)D(j) In that respect Wherein,
uD represents the required bandwidth value of the user, and rD represents the bandwidth value that can be provided by the DTN routing method;
calculating the matching probability P of the processor consumption value of RS (j) and the idle value of the processor of the equipment according to the formula (2)T(j)；
Where fT represents the device processor idle value and rT represents the processor consumption value of rs (j).
Calculating the matching probability P of the memory consumption value of RS (j) and the memory idle value of the equipment according to the formula (3)M(j)；
Where fM represents the memory free value of the device and rM represents the memory consumption value of RS (j).
If PD(j)∈[α,1]Storing the RS (j) into a requirement matching list (D); if PT(j)∈[β,1]Then rs (j) is stored into the processor matching list (T); if PM(j)∈[γ,1]Rs (j) is stored in the memory matching list (M), otherwise, other routing methods are searched, wherein α ═ 0.7, β ═ 0.4, and γ ═ 0.6.
② the screening module receives the demand matching (D) list, the processor matching (T) list and the memory matching (M) list from the matching module, searches and checks the list information, if the DTN routing method RS (j) exists in each list, the RS (j) routing method is the best routing Scheme (SP), otherwise, the DTN routing method with the maximum matching probability value is selected from the list (D), the list (T) and the list (M), the DTN routing method selected from each list is synthesized into the best routing Scheme (SP), and the SP is sent to the Execution Module (EM) and the device-to-device information interaction module (BIM).
(8) The Execution Module (EM) receives the routing Scheme (SP) from the DTN routing scheme Selection Module (SM) and executes it.
Referring to fig. 1 and 2, the present invention performs the selection of a specific routing scheme by the following steps:
step 1, the user starts the DTN routing function of the handheld mobile equipment N. The turn-on command is received by a DTN turn-On Module (OM) of the handheld mobile device N.
Step 2, after the DTN Opening Module (OM) of the handheld mobile equipment N receives the opening instruction, firstly, the DTN opening module sets the equipment identifier ID for the equipment NN. Secondly, whether any handheld mobile device M exists in the communication range of the handheld mobile device N is checked, if the search result is that a plurality of devices exist, the step 3 is executed, and if only one device M is searched, the step 4 is executed. If the equipment is not searched, the handheld mobile equipment N carries out the next round of search
Step 3OM obtaining device identifier ID of nearest device MMProceed to step 5.
Step 4OM directly acquires device identifier ID of device MMProceed to step 5.
Step 5OM sets Flag of DTN routing function state to True, and second OM sets ID of device MMAnd sending the information to a device-to-device information interaction module (BIM). And sending the Flag to a DTN routing method acquisition module (ROM), an equipment resource perception module (TM) and a user demand collection module (GM).
Step 6, when the receiving interface of the information among the equipments in the information interaction module among the equipments (BIM) receives the information from the DTN opening moduleID of (OM)MThen, the receiving device identifier is IDMTransmitting DTN routing method set C (M) supported by the supported equipment M and sending IDMAnd sending the information to an inter-device information sending interface, and sending C (M) to a DTN routing method Filtering Module (FM).
And 7, when the DTN routing method acquisition module (ROM) receives the Flag from the DTN start module (OM), and if the Flag is True, acquiring a DTN routing method set c (n) supported by the device, and sending the DTN routing method set c (n) to a matching module in the DTN routing method Filtering Module (FM).
And 8, screening out a common DTN routing method set C (M & N) by the DTN routing method Filtering Module (FM) through intersection solving, and sending the C (M & N) to the DTN routing scheme Selecting Module (SM).
And 9, the user requirement collection module (GM) receives the Flag from the DTN starting module (OM), and if the Flag is True, collects the user requirement, resolves the user requirement into a requirement binary group (requirement name, requirement content), and sends the binary group to the DTN routing scheme Selection Module (SM).
Step 10, the device resource perception module (TM) receives the Flag from the DTN activation module (OM), and if the Flag is True, obtains the condition of the device resource, analyzes the resource condition into a resource binary group (an idle value of a CPU processor, an idle value of a memory), and sends the binary group to the DTN routing scheme Selection Module (SM).
Step 11, when the matching module in the DTN routing scheme Selection Module (SM) receives the demand binary group and the routing method set C (M)&N) and resource binary, calculating P using formula (1), formula (2) and formula (3)D(j)、PT(j)、PM(j) In that respect If PD(j)∈[α,1]Storing the RS (j) into a requirement matching list (D); if PT(j)∈[β,1]Then rs (j) is stored into the processor matching list (T); if PM(j)∈[γ,1]Storing rs (j) in the memory matching list (M), otherwise, continuing to search for other routing methods, wherein α ═ 0.7, β ═ 0.4, γ ═ 0.6, matching the list (D) with the processor matching list (M)And (T) sending the list (M) to a screening module.
Step 12, after the screening module receives the list sent by the matching module, searching and checking the list information, if the DTN routing method rs (j) exists in each list, the DTN routing method rs (j) is the optimal routing Scheme (SP). Otherwise, selecting the DTN routing method with the maximum matching probability value from the demand matching (D) list, the processor matching (T) list and the memory matching (M), and combining the DTN routing methods selected from the lists to synthesize a routing Scheme (SP). And sends the SP to an inter-device information sending interface in an Execution Module (EM) and an inter-device information interaction module (BIM).
Step 13, the inter-device information sending interface in the inter-device information interaction module (BIM) sends the received routing Scheme (SP) to the device with the ID markMIn the handheld mobile device M.
Step 14 the Execution Module (EM) executes the received routing Scheme (SP).
The invention has the beneficial effects that:
(1) the invention can collect the requirement of the user, sense the available resource condition of the handheld mobile equipment and select the DTN routing scheme which can be supported by the idle resource of the handheld mobile equipment and can meet the personalized requirement of the user as much as possible. For example, when a user uses an application with relatively low requirements on delay, security, and the like, the user tends to use a simple routing scheme; when the user uses the application with higher performance requirement, the user tends to combine a plurality of routing schemes, thereby better solving the personalized requirement of the user.
(2) The handheld mobile equipment adopts the optional DTN routing method for communication, so that the resource overhead of the handheld equipment can be reduced and the delivery rate of the message can be improved.

Claims (1)

1. A delay tolerant network personalized routing scheme selection system for a handheld mobile device, characterized by:
(1) a delay tolerant network DTN starting module OM of the handheld mobile equipment N receives an instruction of starting a DTN routing function from a user and sets an equipment identifier ID for the equipment NNThe OM searches whether any handheld mobile equipment M exists in the communication range of the equipment N; if the search result is multiple devices, OM obtains the device identifier ID of the device M closest to the OMM(ii) a If only one device M is searched out, the OM directly acquires the device identifier of the device MIDM(ii) a OM sets Flag of state of DTN routing function to True; OM will IDMSending a state Flag bit Flag of the DTN routing function to a BIM (building information management) of the equipment N, and sending the state Flag bit Flag of the DTN routing function to a ROM (read only memory), a TM (device resource sensing) module and a GM (user demand collection) module of the DTN routing method; if the equipment is not searched, the mobile equipment N is held by the hand to perform the next round of search;
(2) the equipment-to-equipment information interaction module BIM is used for information interaction between the handheld mobile equipment N and the handheld mobile equipment M, and comprises an equipment-to-equipment information receiving interface, an equipment-to-equipment information storage and an equipment-to-equipment information sending interface:
the inter-equipment information receiving interface receives the ID from the DTN opening module OMMAnd receives the device identifier as IDMThe handheld mobile device M transmits its supported DTN routing method set c (M), whereinID (identity)MSending the information to an inter-device information sending interface, and sending C (M) to a DTN routing method filtering module;
the inter-equipment information sending interface receives the routing scheme SP from the DTN routing scheme selection module SM in the handheld mobile equipment N and sends the routing scheme SP to the equipment with the mark IDMIn the handheld mobile device M;
(3) the user demand collection module GM receives the Flag from the DTN starting module OM, if the Flag is True, the user demand is collected, the user demand is analyzed into a demand binary group, namely a demand name and a demand content, and then the binary group is sent to the DTN routing scheme selection module SM;
(4) the device resource sensing module TM receives the Flag from the DTN start module OM, and if the Flag is True, acquires the resource condition of the handheld mobile device N, and resolves the resource condition into a resource binary group, i.e., an idle value of the CPU processor and an idle value of the memory, and sends the binary group to the DTN routing scheme selection module SM;
(5) a DTN routing method obtaining module ROM receives the Flag from the DTN starting module OM, and if the Flag is True, obtains a set c (n) of DTN routing methods supported by the device, where the set c (n) of DTN routing methods is obtainedC is DTN routing method set; and send it to DTN routing method filtering module FM;
(6) a DTN routing method filtering module FM receives a set C (M) of an inter-device information memory in an inter-device information interaction module BIM and a set C (N) of a DTN routing method acquisition module ROM; screening out a common DTN routing method set C (M & N) by solving an intersection, and sending the C (M & N) to a DTN routing scheme selection module SM;
(7) a DTN routing scheme selection module SM receives a routing method set C (M & N) from a DTN routing method filtering module FM, a resource binary group from an equipment resource perception module TM and a demand binary group from a user demand analysis module GM, screens out an optimal routing scheme SP, the routing scheme SP is formed by combining one or more routing methods, and sends the routing scheme SP to an inter-equipment information sending interface in an execution module EM and an inter-equipment information interaction module BIM; the DTN routing scheme selection module mainly comprises a matching module and a screening module;
the matching module is used for calculating the matching condition of the requirement of the user and the performance of the DTN routing method, and the matching condition of the equipment resource idle condition and the resource consumption of the DTN routing method; set C (M) for DTN routing methods&DTN routing method RS (j) in N), wherein j, 0<j≤|C(M&N)|，|C(M&N) | represents the set C (M)&N) number of elements; set C (M) for DTN routing methods&DTN routing method RS (j) in N), wherein j, 0<j≤|C(M&N)|，|C(M&N) | represents the set C (M)&N) number of elements; such as formulaCalculating the matching probability P between the bandwidth in RS (j) and the bandwidth required by the userD(j) (ii) a Wherein,
uD represents the required bandwidth value of the user, and rD represents the bandwidth value that can be provided by the DTN routing method;
calculating the matching probability P of the processor consumption value of RS (j) and the idle value of the processor of the equipmentT(j)；
Wherein fT represents a device processor idle value, rT represents a processor consumption value of rs (j);
calculating the probability P of the match between the memory consumption value of RS (j) and the memory free value of the deviceM(j)；
Wherein fM represents a memory free value of the device, rM represents a memory consumption value of RS (j);
if PD(j)∈[α,1]Storing the RS (j) into a requirement matching list D; if PT(j)∈[β,1]Then storing RS (j) into a processor matching list T; if PM(j)∈[γ,1]Storing the RS (j) into a memory matching list M, otherwise, continuously searching other routing methods, wherein α, β and gamma are selected threshold values, and sending a routing scheme SP, a processor matching list T and the memory matching list M to a screening module;
the screening module receives a demand matching list D, a processor matching list T and a memory matching list M from the matching module, searches and checks list information, if a DTN routing method RS (j) exists in each list, the RS (j) routing method is the best routing scheme SP, the DTN routing method with the maximum matching probability value is selected from the demand matching list D, the processor matching list T and the memory matching list M respectively, the DTN routing methods selected from the lists are combined into the best routing scheme SP, and the best routing scheme SP is sent to the execution module EM and the inter-device information interaction module BIM;
(8) the execution module EM receives the routing scheme SP from the DTN routing scheme selection module SM and executes:
the implementation flow steps of the delay tolerant network personalized routing scheme selection system facing the handheld mobile equipment are as follows:
(1.1) the user starts the DTN routing function of the handheld mobile equipment N, and the starting instruction is received by a DTN starting module of the handheld mobile equipment N;
(1.2) after the DTN opening module of the handheld mobile equipment N receives the opening instruction, firstly, setting the equipment identifier ID for the equipment NN(ii) a Secondly, checking whether any handheld mobile equipment M exists in the communication range of the handheld mobile equipment N, if the search result is that a plurality of pieces of equipment exist, executing (1.3), if only one piece of equipment M is searched, executing (1.4), and if the equipment is not searched, executing the next round of search by the handheld mobile equipment N;
(1.3) OM obtains device identifier ID of nearest device MMEntering (1.5);
(1.4) OM directly acquires device identifier ID of device MMEntering (1.5);
(1.5) OM sets Flag of state of DTN routing function to True, and secondly, OM sets ID of device M to TrueMSending the Flag True to an inter-device information interaction module, and sending the Flag True to a DTN routing method acquisition module ROM, a device resource perception module TM and a user demand collection module GM;
(1.6) when the inter-device information receiving interface in the inter-device information interaction module BIM receives the ID from the DTN starting module OMMThen, the receiving device identifier is IDMThe device M transmits its supported DTN routing method set C (M) and sends the IDMSending the information to an inter-equipment information sending interface, and sending C (M) to a DTN routing method filtering module FM;
(1.7) when the ROM of the DTN routing method acquisition module receives the Flag from the OM, if the Flag is True, acquiring a set c (n) of the DTN routing methods supported by the device, and sending the set c (n) of the DTN routing methods to a matching module in the filtering module of the DTN routing methods;
(1.8) screening out a common DTN routing method set C (M & N) by an FM (frequency domain model) filtering module through intersection solving, and sending the C (M & N) to an SM (routing scheme selection module) of the DTN;
(1.9) the user demand collection module GM receives the Flag from the DTN startup module OM, and if the Flag is True, collects the user demand, resolves the user demand into a demand binary group, namely a demand name and a demand content, and sends the binary group to the DTN routing scheme selection module SM;
(1.10) the device resource sensing module TM receives the Flag from the DTN startup module OM, and if the Flag is True, obtains the condition of the device resource, resolves the resource condition into a resource binary group, namely an idle value of a CPU processor and an idle value of a memory, and sends the binary group to the DTN routing scheme selection module SM;
(1.11) when the matching module in the DTN routing scheme Selection Module (SM) receives the demand binary group and the set C (M) of the routing methods&N) and after resource doublet, calculating PD(j)、PT(j)、PM(j) If P isD(j)∈[α,1]Storing the RS (j) into a requirement matching list D; if PT(j)∈[β,1]Then storing RS (j) into a processor matching list T; if PM(j)∈[γ,1]Storing the RS (j) into a memory matching list M, otherwise, continuously searching other routing methods, wherein α, β and gamma are selected threshold values, and sending a demand matching list D, a processor matching list T and a memory matching list M to a screening module;
(1.12) after the screening module receives the lists sent by the matching module, searching and checking list information, and if a DTN routing method RS (j) exists in each list, taking the DTN routing method RS (j) as an optimal routing scheme SP; otherwise, selecting the DTN routing method with the maximum matching probability value from the demand matching list D, the processor matching list T and the memory matching list M respectively, combining the DTN routing methods selected from the lists and synthesizing an optimal routing scheme SP; sending the optimal routing scheme SP to an execution module EM and an inter-device information sending interface in an inter-device information interaction module BIM;
(1.13) sending the received SP to the equipment by the inter-equipment information sending interface in the BIM to be marked as IDMHand-held moving ofIn the mobile equipment M;
(1.14) the execution module EM executes the received routing scheme SP.
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