CN104394516B - Maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns - Google Patents

Maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns Download PDF

Info

Publication number
CN104394516B
CN104394516B CN201410698104.4A CN201410698104A CN104394516B CN 104394516 B CN104394516 B CN 104394516B CN 201410698104 A CN201410698104 A CN 201410698104A CN 104394516 B CN104394516 B CN 104394516B
Authority
CN
China
Prior art keywords
node
broadcast
nodes
broadcast tree
neighbours
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201410698104.4A
Other languages
Chinese (zh)
Other versions
CN104394516A (en
Inventor
王海
于卫波
董超
牛大伟
米志超
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201410698104.4A priority Critical patent/CN104394516B/en
Publication of CN104394516A publication Critical patent/CN104394516A/en
Application granted granted Critical
Publication of CN104394516B publication Critical patent/CN104394516B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/104—Peer-to-peer [P2P] networks
    • H04L67/1061—Peer-to-peer [P2P] networks using node-based peer discovery mechanisms
    • 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
    • H04W40/10—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on available power or energy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a kind of maximal cover broadcast tree method for building up based on Android WI FI DIRECT patterns, for running more than 4.0 versions of Android, realize that information multi-hop is shared between multiple intelligent terminals with Wi Fi modules, the Wi Fi Direct patterns that more than 4.0 versions of Android are supported be make use of to establish broadcast tree, 2G/3G/4G mobile base stations and Wi Fi hot spots are not depended on, it can realize that multi-hop is broadcasted between multi-user without root, extend the application range of Wi Fi Direct.The core forwarding node for the broadcast tree established all is to participate in the more person of neighbours' quantity in member, and so as to ensure that broadcast tree broad covered area, broadcast tree depth is low, so that end-to-end broadcast time delay maintains lower value.

Description

Maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns
Technical field
The present invention relates to a kind of Wi-Fi Direct patterns based on Andriod operating systems, suitable for operation The maximal cover broadcast tree method for building up of more than Andriod4.0 operating system mobile phones, belongs to wireless communication technology field.
Background technology
In recent years, smart mobile phone has been obtained for widely available.There are two mainstream operation system on smart mobile phone is main： Android operation system and IOS operating system.Wherein, IOS operating system is developed by Apple Inc., is mainly used for Iphone systems Row mobile phone, and Android operation system is then developed by Google companies, the operating system of operation covers Samsung and most states Produce mobile phone such as Huawei, in emerging and a large amount of intelligent domestic system such as TVs etc..Wi-Fi chips are integrated on these mobile phones mostly Group, can realize wireless data transmission, and various wireless networks are applied as wechat is widely used.But at present exhausted is mostly Number wireless application will rely on infrastructure, the i.e. mobile base station of 2G/3G/4G either WI-FI hot spots, some mobile subscriber's phases Information exchange between mutually will also be forwarded by base station or hot spot, thus be lacked in base station and hot spot (such as remote scenic spot, outlying Area when) and during particular surroundings such as marine, natural calamity, the wireless data transmission function of mobile phone is then completely unusable, from And user experience is seriously affected.
As the interactive tools such as wechat are increasingly popularized, base station or infrastructure are not depended in recent years, between mobile phone directly It is more and more to carry out the demand of data interaction, more and more urgently.In order to meet this demand, WI-FI standards working group is formulating On the basis of 802.11 standards of IEEE, ad hoc patterns and Wi-Fi Direct patterns are added, and has worked out WI-FI P2P technical specification Ad hoc patterns can support ad hoc network between multiple Wi-Fi equipments, but so far, ad hoc patterns It is not responded extensively, the Wi-Fi chipsets of most of mobile phone do not support ad hoc patterns.Meanwhile even mobile phone Wi-Fi Chipset supports ad hoc patterns, and being switched to ad hoc patterns from the normal mode of Wi-Fi and be also required to apply has root authority. This permission only has a small amount of intelligent machine pre-installed software just to possess.General mobile phone is difficult to obtain this permission, so as to cause ad Hoc patterns are simultaneously impracticable.On the other hand, Wi-Fi Direct patterns have obtained many mobile phone manufacturers in recent years and operation is The support of system, Google companies support Wi-Fi Direct patterns after Android 4.0, and are switched to Wi- from normal mode Root authority is not required in Fi Direct patterns.
The exactly compatibility of Wi-Fi Direct patterns and normal mode and the facility feature without root, have promoted Wi- The rapid proliferation of Fi Direct, international research mechanism ABI Research estimations, by Wi-Fi that is present, having delivered Direct equipment had 2,000,000,000, by 2018, it is contemplated that will have 81% to support Wi-Fi Direct connections in all Wi-Fi equipments. For example fast tooth of some cell phone softwares etc. all supports Wi-Fi Direct.
But up to the present, the main application model of Wi-Fi Direct is direct transferred for point-to-point file, Wu Fashi It now broadcasts, i.e., a people in same region transmits the information to owner simultaneously.Which limits answering for Wi-Fi Direct With.The present invention is exactly the realization facility and popularization using Wi-Fi Direct, by using Wi-Fi Direct mechanism, one Between multiple mobile phones that communication is participated in a regional area, it is established that the broadcast tree of an energy cover-most number node (is supported more Jump), these mobile phones need to issue other people broadcast message, by broadcasting tree forwarding, realize the whole network information sharing function. Extend the application field of Wi-Fi Direct.
The content of the invention
Goal of the invention：It, can be with without root using Wi-Fi Direct for problems of the prior art and deficiency The function of directly being communicated under the conditions of no base station, without Wi-Fi Hotspot by standard Wi-Fi Direct interaction mechanisms, is led to Maximal cover broadcast tree method for building up proposed by the present invention is crossed, one is established between the multiple users of Android intelligent machine of communication are participated in It is a supporting multi-hop, to possess the broadcast tree that the smart mobile phone (hereinafter referred to as node) of more neighbours' number is core forwarding node, So as to without base station, under conditions of operating system root authority, realize the broadcast issue between multiple nodes, simultaneously to the greatest extent The coverage of broadcast tree is possibly improved, shortens broadcast tree depth, to reduce end-to-end broadcast time delay.
Technical solution：In Wi-Fi Direct communication protocol designs, communicating pair status is simultaneously unequal.One of quilt Referred to as Group Owner (GO), another is referred to as Group Client (GC).The selection of GO and GC by both party link setup when interact GO intent values determine.The high person of GO intent values becomes GO.To not clear and definite as GO intent by the use of what value in specification Regulation.For other new addition nodes, GO undertakes the function of similar Wi-Fi Hotspot, can support no Wi-Fi Direct The node access of function.GO can also further consult with other nodes simultaneously, become the GC or GO of other nodes.Pass through this Kind mode, Wi-Fi Direct can realize multi-hop transmission.Patent of the present invention is exactly to take full advantage of this function to establish extensively Broadcast tree.Using the Neighbor Reachability of participation node as GO Intent values.
A kind of maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns, when in a region Two or more nodes are needed not by base station interactive information, and each node is with the one or more of neighbours in a broadcast manner When node is in the communication range of Wi-Fi signal, begin attempt to establish broadcast tree.
After the intelligent platform of operation Android operation system starts shooting and completes initialization, i.e., according to WI-FI P2P technologies Specification periodically enters and intercepts (listen) and search (search) state.State is being intercepted, is listening the detection of other nodes please (probe request) message is sought, in search condition, probe requests thereby (probe request) message is initiated in wifi channels, His node can receive the probe request message of oneself transmission.User Defined word in the probe request message sent in each node Duan Li, the neighbor node quantity of the transmission probe requests thereby being had been found that comprising this node (probe request) message.Record is each The value carried in probe message.Each node i probe messages P2P information elements (Information Element, below Abbreviation IE) P2P attributes 221 (vendor specific attribute, 2 bytes of length) inner carry oneself and can listen to Node quantity NiWith self electric quantity value.Node quantity NiFor 1 byte, 255 neighbours are can have up to, self electric quantity value accounts for Second byte, value 0-100, for the percent value of electricity.After intercepting a period of time, node (being set to A) discovery has neighbours The N senti=1 or in no NiWhen=1, the node quantity N that oneself can listen toASelf residual electricity is multiplied by not less than other Node NiWhen being multiplied by its own remaining capacity, A will attempt to be multiplied with GO Negotiation request message and its neighbours' number Wi-Fi Direct connections are established with the neighbours of its own remaining capacity suboptimum.The mode of foundation follows Wi-Fi P2P technical specifications. The GO intent values of both sides' interaction are equal to
Wherein, NiFor the node quantity that neighbours' quantity of node i, i.e. node i oneself can listen to, PiFor node i itself Remaining capacity, NPMAX are (Ni×Pi) maximum, i=1 ... M, M are the number of node, the high person of GO intent values as GO, And the opposing party then becomes GC.GO records oneself responsible node number, builds using oneself as root, other GC are the tree of leaf.Then, GO It continues to attempt to establish new Wi-Fi Direct with other neighbor nodes not in the tree.If it hears on channel is intercepted has When the beacon message or DHCP offer message of other GO hairs, it first attempts to establish new Wi-Fi with these GO Direct connections.Judgement foundation when establishing new Wi-Fi Direct connections is still neighbours' numerical value of N * remaining capacities P.So It is it is possible that be maintained the GO or GC as another GO.It, will be using oneself as on the broadcast tree of root as a side GO of GC Offer the new GO of oneself.New GO is classified as the next-hop node using oneself as the tree of root by that GO of the GC as oneself.This Two broadcast trees of sample are merged into one.New GO will continue to attempt to establish Wi-Fi Direct companies with the node not in broadcast is set It connects, until oneself merges or oneself become the root of all neighbours by other broadcast tree.
Finally, root node broadcasts a piece of news to all intermediate nodes and leaf, and message indicates that the root node is broadcast tree Root.All broadcast messages can give root node forwarding.After, the broadcast message of the whole network can first issue root node, then by Root node sets forwarded hop-by-hop according to broadcast, until reaching all nodes.
Advantageous effect：Compared with prior art, it is provided by the invention based on Android WI-FI DIRECT patterns most Big coverage broadcast tree method for building up, the broadcast tree established using Wi-Fi Direct can not depend on 2G/3G/4G base stations, in neighbour It is shared between near mobile phone, interactive information, mobile phone is made to become media of communication between a kind of group that can depart from base station, due to adopting Wi-Fi Direct patterns, so root authority is not required using the application program of the method, as long as in operation andriod It can be achieved on 4.0 mobile phone, and the broadcast tree built up, core group membership (Group owner) selection have taken into account neighbouring Neighbours' quantity at most and the most double factors of remaining capacity, ensures that constructed broadcast tree, once broadcasting can in mobile phone To be advertised to user as much as possible, constructed broadcast tree depth (hop count forwarded) is as short as possible.So as to effectively reduce Broadcast time delay.
Description of the drawings
Fig. 1 establishes multi-hop catenation principle figure for WI-FI direct；
Fig. 2 is elected as GO for node B, and the schematic diagram of broadcast tree is established using oneself as root；
Fig. 3 is the Wi-Fi Direct connections of B, C node, and C is elected as GO, the schematic diagram that broadcast tree merges.
Fig. 4 is the supplemental messages form of P2P IE in probe request.
Specific embodiment
With reference to specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention Rather than limit the scope of the invention, after the present invention has been read, those skilled in the art are to the various equivalences of the present invention The modification of form falls within the application scope as defined in the appended claims.
Maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns, includes the following steps：
The first step：One node i for wanting to add in broadcast group is periodically entered first, in accordance with WI-FI P2P technical specifications Intercept (listen) and search (search) state.State is being intercepted, is listening the probe requests thereby (probe request) of other nodes Message in search condition, initiates probe requests thereby (probe request) message, other nodes can receive oneself in wifi channels The probe request message of transmission.The vendor specific of P2P IE in the probe request message sent in node i Attribute (221) attribute field.Message format is referring to Fig. 4.I.e. attribute field is 221, and length is 3 bytes.Next 1 byte is type of message.It is herein 2, representative is user-defined electricity and degree of communication notice message.Immediately after 1 A byte for find neighbours' quantity, value 0-255.Followed by 1 byte be charge value in percentage, round numbers 0-100.The message includes the neighbor node quantity of transmission probe requests thereby (probe request) message that this node has been found that NiWith the remaining capacity P of this nodei.After listening periods, if there is group beacon message, then the group is added in.It should The node is classified as the leaf node of this group broadcast tree by group GO.The 5th step is jumped to, if there is no beacon message, entrance is next Step.
Second step：N in the probe request message sent according to the neighbor node j receivedjWith the residue of the node Electricity Pj, and to all N receivedj×PjAnd the N of itselfi×PiSequence, determine oneself whether link setup.If above-mentioned value is maximum Person is NPMAX.When there is node NjInto the 3rd step (only oneself being the neighbours of neighbours, representative is isolated point) or certainly when=1 Oneself is the owner (N of NPMAXi×Pi=NPMAX, Ni×Pi＞ Nj×Pj, for all neighbours j, i ≠ j) when, then into the 3rd Step, otherwise returns to the first step；
3rd step：Using the standard connection mode of Wi-Fi Direct, GO negotiation request are first sent, are tasted Examination is with Nj×PjSecond largest neighbor node j establishes direct connections；Group owner when establishing connection is inclined to (Group Owner Intent, GO intent) value is as follows：
The node of GO Intent high becomes GO.Without loss of generality, if node is B, GO Intent are GB.If node B with Node A link setups, GB>GA；So B is chosen as GO, A is chosen as GC (Group Client).B establishes a broadcast tree, root B, leaf Node is A；Subsequent B sends out beacon message on channel, and it oneself is this group of GO to notice；
4th step：Other nodes hear beacon message of the GO on channel, add in this group, and GO arranges these addition nodes For the leaf node of broadcast tree.In Fig. 2, node D hears the beacon message of node B, adds in this group, forms as shown in the right side of fig 2 Broadcast tree.
5th step：GO trials are established Wi-Fi Direct with the GO that other hairs seek (beacon) on channel and are connected.Notice Interaction GO intent determine new GO.In Fig. 3, node B hair message is established Wi-Fi Direct with node C and is connected.GB<GC, then Node C is chosen as new GO, and B nodes are the GC newly organized.
6th step：The GC nodes newly selected notice the broadcast tree information oneself established to new GO nodes, and new GO nodes will New GC nodes graft the broadcast tree of new GC nodes original broadcast tree into oneself as child node.As shown in figure 3, B nodes will The broadcast tree information announcement of oneself is to C.The broadcast tree that C builds B is grafted as the subtree of oneself using B as the child node of oneself. The new broadcast tree so formed is as shown in Fig. 3 bottom rights.C is root node, and B is transfer node, and A, D, F is leaf node.
7th step：With the presence or absence of the node for not adding in broadcast tree on the GO nodes detection channel newly selected.If so, it redirects To the 5th step, if not provided, GO nodes issue broadcast message by the broadcast tree built up, inform all nodes to the whole network node This node is broadcast root node.The broadcast message of the whole network can give root node forwarding after so.In figure 3, C to the whole network its He is node B, A, D, and it oneself is root node that F, which is noticed,.Later all nodes will send C to by hop-by-hop if there is broadcast message first, then By C by broadcasting tree forwarding.

Claims (2)

1. a kind of maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns, which is characterized in that when Two or more nodes are needed not by base station interactive information, and each node is with neighbours' in a broadcast manner in one region When one or more nodes are in the communication range of Wi-Fi signal, begin attempt to establish broadcast tree, specifically include：
1) node of broadcast group, need to be added in, first sends Wi-Fi probe request, wherein carrying the neighbours' number letter listened to Breath；
2), each node intercepts the probe request of other nodes, in the probe request information for recording other nodes Neighbours' number, when neighbours' number of neighbours is multiplied by node self residual electricity not less than other nodes for neighbours' number of 1 or node When neighbours' number is multiplied by other node self electric quantities, attempt to be multiplied by the big node of its own electricity time with neighbours' number for 1 or neighbours' number Connection is established, it is exactly that terminal is current that group owner when establishing connection, which is inclined to (Group Owner intent, GO intent) value, Neighbours' number is multiplied by this node remaining capacity, and the high node of GO intent values becomes GO (Group Owner), is worth low person as GC (Group Client)；
3), GO establishes broadcast tree, and using oneself as broadcast tree root node, other GC are the leaf node of broadcast tree；
4), GO trials are established Wi-Fi Direct with other GO on channel and are connected；Notice interaction GO Intent values, GO Intent Value calculating method is：
Wherein, NiFor the node quantity that neighbours' quantity of node i, i.e. node i oneself can listen to, PiFor the self residual of node i Electricity, NPMAX are (Ni×Pi) maximum, i=1 ... M, M are the number of node, and the high person of GO intent values is new GO, GO The low person of intent values is new GC；
5) the GC nodes, newly selected notice the broadcast tree information oneself established to new GO nodes, and new GO nodes are by new GC nodes As child node, the broadcast tree of new GC nodes is grafted the broadcast tree into oneself；Form the new broadcast tree using oneself as root；
After the completion of maximal cover broadcast tree is established, root node broadcasts a piece of news to all intermediate nodes and leaf, and message indicates The root node is the root of broadcast tree, and all broadcast messages can give root node forwarding；After, the broadcast message of the whole network can be first Root node is issued, then forwarded hop-by-hop is set according to broadcast by root node, until reaching all nodes；
One node i for wanting to add in broadcast group is first with Wi-Fi channel senses oneself at one's side either with or without having built up Wi-Fi Direct group beacon message and intercept other nodes send probe request message；Statistics sends probe The nodal point number N of request messagei；After listening periods, if there is group beacon message, then the group is added in；It should The node is classified as the leaf node of this group broadcast tree by group GO.
2. the maximal cover broadcast tree foundation side according to claim 1 based on Android WI-FI DIRECT patterns Method, it is characterised in that：The intelligence that the intelligent terminal of broadcast group need to be added in as operation more than Andriod4.0 Edition operating systems is whole End, the standard connection mode defined using the Wi-Fi Direct specifications of standard.
CN201410698104.4A 2014-11-26 2014-11-26 Maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns Expired - Fee Related CN104394516B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410698104.4A CN104394516B (en) 2014-11-26 2014-11-26 Maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410698104.4A CN104394516B (en) 2014-11-26 2014-11-26 Maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns

Publications (2)

Publication Number Publication Date
CN104394516A CN104394516A (en) 2015-03-04
CN104394516B true CN104394516B (en) 2018-05-29

Family

ID=52612342

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410698104.4A Expired - Fee Related CN104394516B (en) 2014-11-26 2014-11-26 Maximal cover broadcast tree method for building up based on Android WI-FI DIRECT patterns

Country Status (1)

Country Link
CN (1) CN104394516B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105979610A (en) * 2016-05-09 2016-09-28 腾讯科技（深圳）有限公司 Terminal control method and device
CN114845289B (en) * 2022-04-12 2023-09-29 中国电信股份有限公司 Multi-hop networking method, device, equipment and storage medium
CN115250434B (en) * 2022-07-25 2024-05-10 中国电信股份有限公司 Near-field multi-hop networking method and device, computer readable medium and electronic equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519071A (en) * 1948-06-17 1950-08-15 Gen Electric Hook-on power-factor indicator
CN102932401A (en) * 2011-08-08 2013-02-13 三星电子株式会社 Method and apparatus for forming wi-fi p2p group using wi-fi direct
CN103577367A (en) * 2012-07-18 2014-02-12 美国博通公司 System and method for managing roles in a peer-to-peer connection

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7814104B2 (en) * 2005-05-04 2010-10-12 Oracle International Corporation Techniques for partition pruning
WO2013035999A1 (en) * 2011-08-26 2013-03-14 엘지전자 주식회사 Method and device for discovering neighbors for wireless fidelity direct (wfd) peer to peer (p2p) communication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519071A (en) * 1948-06-17 1950-08-15 Gen Electric Hook-on power-factor indicator
CN102932401A (en) * 2011-08-08 2013-02-13 三星电子株式会社 Method and apparatus for forming wi-fi p2p group using wi-fi direct
CN103577367A (en) * 2012-07-18 2014-02-12 美国博通公司 System and method for managing roles in a peer-to-peer connection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
device-to-device communications with wifi direct:overview and experimentation;Daniel camps-mur et al.;《IEEE Wireless Communication》;20130630;第97页右栏以及图1 *

Also Published As

Publication number Publication date
CN104394516A (en) 2015-03-04

Similar Documents

Publication Publication Date Title
CN101480103B (en) Method of operating a dual SIM wireless communications device
Trifunovic et al. WiFi-Opp: ad-hoc-less opportunistic networking
CN104540090B (en) A kind of networking interconnecting method and system based on low-power consumption bluetooth
EP2750441B1 (en) Content publishing method and user equipment
CN106470491B (en) Method and device for controlling relay user equipment and user equipment
CN104717603B (en) A kind of Bluetooth Low Energy networking simultaneously supports the method and system of convenient interconnection
US8615258B2 (en) Home base station communication with a mobile radio communication device using a home base station group member identifier
CN104904249B (en) For realizing the method and apparatus of the Direct Model communication between user equipment
CN104883712B (en) Cell switching method and system
WO2016004903A1 (en) Device to device communication method, system and storage medium based on network sharing
US9544840B2 (en) Distributed method for client optimization
CN106060936A (en) Method and system for communicating in a wireless mesh network
JP2005192187A (en) Method for establishing channel between user agent and wireless lan access point in environment where a plurality of wireless lan access points are installed
CN105850221A (en) Multi-hop connection establishment between D2D device of established D2D network and not connected D2D device
CN102265699A (en) Centralized control of peer discovery pilot transmission
JP2016521483A (en) Device discovery information reception method, device discovery information transmission method, and user equipment
CN109479337A (en) A kind of link method for building up and relevant device
RU2008144581A (en) MOBILE peer-to-peer networks
CN106060816B (en) A kind of wireless self-networking method and system
JP2005532735A (en) Method of exchanging system information in upper layer of wireless system and automatic system selection method of WLAN
CN112911671B (en) Method and device for constructing topology networking architecture
CN104936247A (en) Method, base station and system used for reselecting relay system
CN106165495A (en) Strengthen based on the preliminary sweep of the neighbor report being generated from the neighbor information that its associated stations is reported by access point
CN107734590A (en) A kind of phone user&#39;s sub-clustering communication means, system and eNodeB, terminal
Pattnaik et al. Fundamentals of Mobile Computing

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180529

Termination date: 20191126

CF01 Termination of patent right due to non-payment of annual fee