CN1728668A - Based on the location tracking method in the wireless network of telegon - Google Patents
Based on the location tracking method in the wireless network of telegon Download PDFInfo
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- CN1728668A CN1728668A CNA2005100853630A CN200510085363A CN1728668A CN 1728668 A CN1728668 A CN 1728668A CN A2005100853630 A CNA2005100853630 A CN A2005100853630A CN 200510085363 A CN200510085363 A CN 200510085363A CN 1728668 A CN1728668 A CN 1728668A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/029—Location-based management or tracking services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/60—Context-dependent security
- H04W12/69—Identity-dependent
- H04W12/71—Hardware identity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
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Abstract
Provide a kind of based on the location tracking method in the wireless network of telegon.Comprising based on this location tracking method in the wireless network of telegon: will comprise that by the device that is connected with wireless network its oneself identifier and first frame of temporal information send to wireless network to disclose its positional information; With second frame that receives the positional information that comprises the described device that sends from wireless network by described device, as replying to described first frame.
Description
Technical field
Method of the present invention relates to is following the tracks of based on the position in the wireless network of telegon.
Background technology
The trend of the networking recently device that needs swap data except that computer that is to interconnect.In the past, cable network is a standard.But the shortcoming as wire structures and limited ambulant wired networking necessitates wireless communication technology.Wireless lan (wlan) and Wireless Personal Network (WPAN) standard is is researched and developed.WPAN has the 10m scope, and WLAN has 50m to the 100m scope.Because WPAN consumes energy still less and supports the Ad-hoc network, so it is being more suitable for the electronic family utensil aspect mobility and the scope.
Call duration time and the competitive mode of using telegon to manage wireless network based on the wireless network of telegon.It uses the many agreements that determined by IEEE 802.15 working groups that set up the WPAN standard by foundation.IEEE 802.15 working groups are divided into four task groups.TG 1 is engaged in the standard based on the WPAN of bluetooth (Bluetooth) 1.x.The coexistence of TG 2 research wireless networks.TG 3 research provides the ultra broadband (UWB) of 20Mbps or higher high transmission rates under low-power consumption.TG 4 research low speed WPAN (LR-WPAN), a kind of technology that low transfer rate (maximum 250kpbs) is provided under low-power consumption.
LR WPAN relates to the low-cost communication network of the low data transmission rate of needs.The IEEE 802.15.4 standard that is called as " ZigBee " is the Radio Transmission Technology that is used for the network of low cost, low-power device as wireless integrated remote control, domestic appliance controller, building management controller and toy.ZigBee is organized in July, 2000 and sets up, and it has finished the work about the standard of physical layer and MAC since then.
This standard given transmission is 250kbps (16 channels in the 2.4GHz frequency band) or 40kbps/20kbps (10 channels in the 915MHz frequency band or 1 channel in the 868MHz frequency band), and scope is that 1m is to 100m.
Still in the work of carrying out about the upper strata, this upper layer packets includes network layer.50 companies that comprise Philips, Motorola, Honeywell, Mitsubishi, Invensys and Samsung are promoters of ZigBee alliance, and they replenish existing standard by ad-hoc wireless networking and procotol that interpolation is used for dispersal device.
ZigBee prepares inventory and the actual work of carrying out the application of HIST of definition clearly.The requirement of IEEE 802.15.4 comprises low-power consumption, low cost and simple foundation structure.These require for network sensor and control device is necessary.
The standard of location-based network of the low speed of ultra broadband (UWB) is used in IEEE 802.15.4a definition, and UWB is the new networking technology that realizes making accurate positional recognition (location awareness) service that immanent environment can realize.
IEEE 802.15.4a is the subgroup of 802.15.4, and its use medium access control (MAC) identical with 802.15.4, but comes alternate physical layer (PHY) with UWB.But it does not have definition position to follow the tracks of agreement.So location-based service must be added to the position tracking technique that embodies IEEE 802.15.4a in the wireless network based on telegon.The secret protection service also should be added in the mode that allows the user control position to follow the tracks of.
Summary of the invention
It is a kind of based on the position tracking function in the wireless network of telegon that an aspect of of the present present invention is to provide.
Another aspect of the present invention is by using position tracking function based on the wireless network of telegon based on the position of coming tracking means as the wireless communication technology of UWB.
Aspect of the present invention be not limited to above-mentioned aspect and do not mention because following description will be for those of ordinary skill in the art more significantly other aspects that become.
The invention provides a kind of based on the location tracking method in the wireless network of telegon.According to comprising of one exemplary embodiment of the present invention: will comprise that by the device that is connected with wireless network first frame of identifier and temporal information sends to wireless network to disclose the position of this device based on the location tracking method in the wireless network of telegon; Comprise the acknowledgement frame of the positional information of the described device that sends from wireless network with reception.
According to comprising based on the location tracking method in the wireless network of telegon of exemplary embodiment of the present invention: first frame that will comprise the identifier of first device and second device sends to wireless network, knows second position of installing so that be connected to first device of wireless network; Receive the acknowledgement frame that comprises from second positional information of installing of wireless network transmission with installing by first.
According to comprising of exemplary embodiment of the present invention: first frame that receives the identifier of the identifier of first device of following the tracks of from the position that comprises request second device of wireless network and second device by second device based on the location tracking method in the wireless network of telegon; Send to wireless network with identifier, second identifier that installs and second frame of temporal information that will comprise first device by second device, as replying to first frame.
According to comprising of exemplary embodiment of the present invention: first frame that receives the identifier of the identifier of first device of following the tracks of from the position that comprises request second device of wireless network and second device by second device based on the location tracking method in the wireless network of telegon; Determine whether to allow the position to follow the tracks of; If follow the tracks of with the permission position, then second device will comprise that the identifier of first device, the identifier of second device and second frame of temporal information send to wireless network, as replying first frame.
According to comprising of exemplary embodiment of the present invention: receive the identifier that comprises this device that sends by device and first frame of temporal information based on the location tracking method in the wireless network of telegon; Use described temporal information to obtain to be used to calculate the position calculation information of the position of described device; Send to network coordinator with second frame of identifier that will comprise described device and described position calculation information.
According to comprising of exemplary embodiment of the present invention: the identifier and the identifier of second device and first frame of temporal information that receive first device of the position that comprises request second device that sends by second device following the tracks of based on the location tracking method in the wireless network of telegon; Use described temporal information to obtain to be used to calculate the position calculation information of second position of installing; Send to network coordinator with the identifier that will comprise first device, the identifier of second device and second frame of position calculation information.
According to comprising of exemplary embodiment of the present invention: a plurality of frames that receive the position calculation information of the identifier that comprises device of automatic network and described device based on the location tracking method in the wireless network of telegon; Use the position of the described device of described position calculation information calculations; Send to described device with the frame that will comprise positional information.
According to comprising of exemplary embodiment of the present invention: the identifier, the identifier of second device and a plurality of frames of position calculation information that receive first device that the position that comprises request second device of automatic network follows the tracks of based on the location tracking method in the wireless network of telegon; Use the position of described position calculation information calculations second device; Send to first device with the frame of the position that will comprise second device.
According to comprising of exemplary embodiment of the present invention: first frame that receives the identifier of the identifier of first device that the position that comprises request second device of automatic network follows the tracks of and second device based on the location tracking method in the wireless network of telegon; Described first frame is sent to second device of described network; Be used to announce the position from the second device reception and follow the tracks of unaccepted second frame; With described second frame is sent to described first the device.
According to comprising of exemplary embodiment of the present invention: receive first frame of the identifier of the identifier that comprises first device that sends by first device and second device, so that the telegon of first wireless network can be followed the tracks of second device based on the location tracking method in the wireless network of telegon; To comprise that by the telegon of described first wireless network second frame of identifier, described first identifier that installs and described second identifier that installs of described first wireless network sends to the telegon of second wireless network; Telegon by described first wireless network receives by the identifier of the identifier that comprises described first wireless network of the telegon transmission of described second wireless network, the identifier of described first device, described second device and the 3rd frame of described second positional information of installing, as replying described second frame; To comprise that with telegon the 4th frame of the positional information of described second device sends to first device by described first wireless network.
According to comprising of exemplary embodiment of the present invention: receive first frame of the identifier of the identifier that comprises first device that sends by first device and second device, so that the telegon of first wireless network can be followed the tracks of described second device based on the location tracking method in the wireless network of telegon; To comprise the identifier of the identifier of described first wireless network, described first device and the telegon that described second identifier that installs sends to described second wireless network by the telegon of described first wireless network; If having received the described second device refusal position of second frame follows the tracks of, then the telegon by described first wireless network receives the identifier of the identifier that comprises described first wireless network, described first device and the 3rd frame of described second identifier that installs, as replying of second frame; To comprise that with telegon the 4th frame of the information that follow the tracks of the described second device refusal position sends to described first device by described first wireless network.
According to comprising of exemplary embodiment of the present invention: first frame that receives the identifier of the identifier of first device of the position of the identifier that comprises first wireless network that the telegon by first wireless network sends, request second device following the tracks of and second device by the telegon of second wireless network based on the location tracking method in the wireless network of telegon; To comprise that by the telegon of described second wireless network identifier of the identifier of described first wireless network, described first device and the identifier of second device send to second device that is connected with second wireless network; Receive the identifier of the identifier of the identifier that comprises first wireless network from described second wireless network, described first device, described second device and a plurality of the 3rd frames of the second position calculation information of installing by the telegon of described second wireless network; Use the position of described second device of described position calculation information calculations of second device by the telegon of described second wireless network; Send to the telegon of described first wireless network with the 4th frame of positional information of described second device of the identifier of the identifier of the identifier that will comprise described first wireless network by the telegon of second wireless network, described first device, described second device and calculating.
According to comprising of exemplary embodiment of the present invention: first frame that receives the identifier of the identifier of first device of the position of the identifier that comprises first wireless network that the telegon by first wireless network sends, request second device following the tracks of and second device based on the location tracking method in the wireless network of telegon; To comprise that by the telegon of second wireless network second frame of identifier, described first identifier that installs and described second identifier that installs of described first wireless network sends to the telegon of the 3rd wireless network; Receive the identifier of the identifier of the identifier that comprises described first wireless network that sends by described the 3rd wireless network, described first device, described second device and the 3rd frame of described second positional information of installing by the telegon of described second wireless network; Send to the telegon of described first wireless network with the 4th frame of positional information of the identifier of the identifier of the identifier that will comprise described first wireless network by the telegon of described second wireless network, described first device, described second device and described second device.
Description of drawings
In conjunction with the drawings its exemplary embodiment is described in detail, above-mentioned and other aspects of the present invention will become apparent, wherein:
Fig. 1 illustrates the structure of tree-shaped (cluster-tree) network of gathering together of 802.15.4 according to an exemplary embodiment of the present invention;
Fig. 2 illustrates tracked according to an exemplary embodiment of the present invention device to the flow chart of telegon request from the processing of position identification (self location awareness);
Fig. 3 illustrates telegon is according to an exemplary embodiment of the present invention discerned flow chart from the processing of (remote location awareness) to tracked device request remote location;
Fig. 4 illustrates according to an exemplary embodiment of the present invention the flow chart of processing that device except that the PAN telegon or the head of gathering together is asked the position tracking of other devices;
Fig. 5 is the flow chart that the processing that is used to follow the tracks of the position that is present in the tracked device beyond gathering together according to an exemplary embodiment of the present invention is shown, and wherein, the PAN telegon is present in during this gathers together;
Fig. 6 is the flow chart that the processing of the position that is used to according to an exemplary embodiment of the present invention to use relay to follow the tracks of tracked device is shown;
Fig. 7 illustrates the conceptual illustration of following the tracks of by the position of TOA method according to an exemplary embodiment of the present invention;
Fig. 8 illustrates the structure of following the tracks of by the position of TDOA method according to an exemplary embodiment of the present invention;
Fig. 9 illustrates being used to according to an exemplary embodiment of the present invention among the 802.15.4 and embodies the frame format of the MAC layer of position tracking function; With
Figure 10,11, the 12nd illustrates the block diagram of the order payload of frame according to an exemplary embodiment of the present invention.
Embodiment
Below will be described in the term that uses in this specification.
Wireless network (Coordinator-based Wireless Network) based on telegon
The network (hereinafter referred to as the wireless network based on telegon) that comprises the radio network device that is used as telegon is that the basis forms single independent wireless network with the telegon.If a plurality of wireless networks based on telegon are present in the same area, then each wireless network based on telegon has the unique identification of distinguishing it.Different based on the network of telegon with the infrastructure network that is used for carrying out radio communication by access point or base station, and it can comprise a plurality of telegons and is included in the ad-hoc network.Telegon can send the temporal information that wireless network needs, and the radio network device that receives this information can send it to other network equipments.In this manual, will describe the wireless network of IEEE 802.15.4, but this only is exemplary embodiment of the present invention and the invention is not restricted to this based on telegon.
Beacon frame (Beacon Frame)
The existence of beacon frame advertised network, and it also carries out the key player in the maintenance of network.Beacon frame comprises the payload of needs when network equipment is connected with network.Network coordinator periodically sends beacon frame, thereby the device that participates in this wireless network can be discerned this network.
Probe requests thereby (Probe Request)
Network equipment sends probe request to seek network.
Response detected (Probe Response)
The network coordinator that receives from the probe requests thereby of network equipment sends the probe response frame that the information of needs when this device is connected to this network is set.
Device, network equipment
Device is the assembly of the wireless network that can communicate by letter with other devices.For example, in IEEE 802.15.4, except that wireless integrated remote control and electronic family utensil controller, also there are building management controller, toy, mouse and cooker.The device that has communication function, controlled function and sensor function in home network or immanent environment is also comprised.
The location recognition frame
The location recognition frame allows network equipment and other devices all to know its position.Other devices of receiving position identification frame can be known the position of network equipment by the position track algorithm.The location recognition frame can comprise frame transmitting time, search the identifier of device and the identifier of the device of the object followed the tracks of as the position.
Positional information locating frame (position calculation information frame)
The angle of the received signal that the positional information frame comprises the position of using this device that frame transmitting time and frame time of reception calculate, comprise this frame or the intensity of this received signal.The position can be represented as the time difference; Be poor between frame transmitting time and the frame time of reception.
The position result frame
The position result frame comprises the positional information by the specific device acquisition of receiving position information frame (position calculation information frame).This frame can be sent to the device of wanting to know own position.
The location recognition claim frame
Location recognition claim frame purpose is to ask the transmission of location recognition frame, thereby is positioned at the position that this outside device of gathering together can be known specific device.The location recognition claim frame can be by being positioned at this outside telegon or be positioned at this inner telegon of gathering together and send of gathering together of gathering together.In addition, the location recognition claim frame can be sent by the device that is positioned at gather together inside or outside, and this device can be inserted in its identifier in this frame.
Fig. 1 illustrates the structure of the tree network of gathering together of 802.15.4 according to an exemplary embodiment of the present invention.802.15.4 comprise starlike, equity and as the tree topology of gathering together of the distortion of equity topology.
Star topology is shown by the label 20 of Fig. 1, and has a network coordinator 21.Communication between the network equipment is carried out by this telegon, and global function device (FFD) and simplify functional device (RFD) and can participate in star topology.The global function device can be communicated by letter with other network equipments, and can take on network coordinator.Simplifying functional device can be only by network coordinator communication.Owing to simplify functional device and can not communicate by letter with other devices independently, so it can not become network coordinator.
The label 10 of Fig. 1 shows the equity topology with a network coordinator.Device can be communicated by letter with other devices in the network of this type.Above-mentioned simplify functional device and can not participate in peer-to-peer network.
The tree network of gathering together is the distortion of equity topology, and they can integrated several networks (as 10,20 and 30).It is formed by connecting two networks at least.Each network is called as one and gathers together.In Fig. 1, have three and gather together 10,20 and 30, and these network coordinators of gathering together are marked as 11,21 and 31 respectively.The network coordinator of gathering together is called as the head of gathering together.Can among a plurality of network coordinators, determine to coordinate the tree network of gathering together as the telegon 31 of PAN telegon.Best, PAN telegon 31 has than more computing capability of other network equipments and resource.The device of the network by Fig. 1 can be communicated by letter with the network equipment in corresponding the gathering together.
Location recognition mainly can be divided into two kinds of situations.Under first kind of situation, network equipment asks location recognition to know its position from the PAN telegon or the head of gathering together.In another case, the position of the PAN telegon or the head request network equipment of gathering together.The former is called as from position identification request, and the latter is called as remote location identification request.
For convenience of explanation, below, the tracked network equipment in its position is called as tracked device, is called as reference unit from the network equipment of tracked device receiving position trace information.
Fig. 2 illustrates tracked according to an exemplary embodiment of the present invention device from the flow chart of telegon request from the processing of position identification.In Fig. 2, the tracked device 101 request location recognition that participate in gathering together are to know its position, and the PAN telegon or the head of gathering together are as telegon.Gathering together is the part of the network among Fig. 1, if but only exist one to gather together, then it can be whole network.In the multiple topology of IEEE 802.15.4, the tree network of gathering together (the most complicated topology) illustrates in this manual, but starlike or reciprocity topology also can be employed.
Fig. 2 shows the active scan processing.Telegon 31 sends beacon frame (S101) continuously.Yet the tracked device 101 that does not receive beacon frame sends probe request and wants to participate in this network (S103) to announce it.Telegon 31 knows that a device wants to participate in the probe response frame (S104) that this network and transmission comprise the network information.Tracked device 101 obtains the information that network connects to be needed by the probe response frame that receives, and sends association request frame (S107).The connection acknowledgement frame that telegon 31 will be provided with the information of connection request sends to tracked device (S108).Below, tracked device can with this network service.The tracked device that is connected with this network sends from detecting the position (S115) of start frame to search for it.This frame is received by reference unit 301,302 and telegon 31 (the PAN telegon or the head of gathering together).Use is included in the signal strength signal intensity (RSS) and the temporal information of the reception of this frame in this frame, the position that can calculate tracked device.Reference unit 301,302 sends to telegon 31 (S121) with locator data, and telegon 31 uses these data and position track algorithm to come calculating location.If telegon 31 will comprise the detection result frame certainly of positional value and send to tracked device 101 (S105) that then tracked device 101 has been known its position.It then,, then is connected with this network, so can know its position by operation S115 to S150 owing to it if tracked device 101 is moved.To explain the position track algorithm below.
Difference between reference unit and the tracked device depends on whether it is tracked object.Therefore, because tracked device 101 has been known its position, so it now just can become reference unit.Participate under the situation of this network at other devices, tracked device 101 can be taken on reference unit, and receives the positional information of another device.In addition, even when device 101 is taken on reference unit, be moved if install 101, then its new position still can be determined by operating 115 to 150.That is, although this device is a reference unit, it also can be become tracked device once more.Difference between reference unit and the tracked device depends on that it is used for determining the reference of setting position or tracked object.
Fig. 3 is the flow chart of processing that the telegon 11 request remote locations identification of another exemplary embodiment according to the present invention is shown.Fig. 3 display network telegon is searched for tracked device and is sent the example of the drive sweep processing of this information.New network equipment is marked as tracked device 102 to distinguish with other network equipments.Telegon 11 sends beacon frame continuously to keep and to manage this network (S201).The tracked device of knowing the existence of this network by beacon frame sends association request frame (S207).If telegon 11 sends the connection acknowledgement frame (S208) of accepting this connection request, then tracked device 102 can with this network service.
In order to know the position of tracked device, the telegon 11 that tracked device is connected with this network sends detection of call claim frame (S211).The detection of call claim frame is different with the start frame of detection certainly of Fig. 2.In order to ensure confidentiality, determine at operation S212 whether tracked device 102 allows the position to follow the tracks of.When tracked device 102 allowed the position to follow the tracks of, it sent to telegon and peripheral unit with its positional information.
When tracked device 102 did not allow the position to follow the tracks of, tracked device 102 sent to telegon and peripheral unit (S216) with the detection of call frame that rejects response.
Positional information is very important for network management.Therefore, although each device does not need to know the positional information of the device of forming network or gathering together, telegon 11 need be known this positional information.Therefore, although this its position of device refusal announcement, the PAN telegon or the head of gathering together also can obtain the positional information of this device according to network configuration.
When positional information be sent to PAN telegon 31 and gather together 11 both the time (situation 1), the detection of call frame that rejects response is sent out (S216).When positional information only is forced to send to PAN telegon 31 (situation 2), tracked device can not send detection of call reject response frame and detection of call acknowledgement frame.
Situation 2 times, there is the method that is used for unconditionally sending the detection of call acknowledgement frame; That is, need not to inquire the user whether he allows the position to follow the tracks of.For the convenience of explaining, will explain below to be used to send the detection of call acknowledgement frame, and need not the method that the user permits.
When the telegon that sends the detection of call claim frame is when gathering together, because only the PAN telegon can force to obtain the position of other devices, so the head of gathering together can not obtain the positional information of other devices.This is only to have had the regular hour because gather together.Therefore, under the situation of tracked device 102 its positions of refusal announcement, the detection of call reject frame is sent to gathers together 11 and reference unit 401,402 (S216), and processing stops.When positional information was forced to send to the PAN telegon and gathers together, tracked device 102 can not be refused this detection of call request.The position of this device is announced to telegon, no matter whether the user allows.Thereby for the user is convenient, processing can be operated S215 to S221.
The operation S212 of Fig. 3 is optional.If network can force to know the position between the device, then handle and carry out, no matter tracked device allows or refuses the position and follow the tracks of.If tracked device 102 is forced to allow the position to follow the tracks of, then handles being carried out the operation that tracked device sends the detection of call acknowledgement frame, and need not to send the message that asks for permission.At this moment, executable operations S201 to S221 only.Follow the tracks of even the user refuses the position, positional information also can be sent to telegon, but its permission or refusal according to the user changes.
On the other hand, for convenience, the user can be provided with replying of tracked device 102 in advance.For example, when the device of following the tracks of when the request position was telegon, the detection of call acknowledgement frame can be set to unconditional transmission.Replying possible set-up mode is, tracked device 102 allows its position of device tracking in the gathering together under each device or the only tracked device 102.This reply be set up after, the detection of call acknowledgement frame only is sent to device or the telegon that is allowed to, and detection of call rejects response and be sent to every other device, need not user's input.The location tracking method of Fig. 3 comprises secret protection.Therefore, operation S212 to S216 can be omitted according to the structure of this network.
Fig. 2 and 3 shows and to be used to the processing that participates in network and be used to obtain the position of tracked device 102.Be used for initiatively connecting network and request from the execution of the processing of Fig. 2 of the device of position identification be not must.Can the drive sweep of tracked device by Fig. 3 with send from detecting start frame after network is connected.On the contrary, even after the Active Networks scanning of Fig. 2, in order to know the position of tracked device 102, telegon also can send the detection of call claim frame.In addition, reference unit can be relay, and this relay receives the frame of the position that is used to set up tracked device, and the positional information that will be included in this frame sends to the head of gathering together.
Fig. 4 illustrates according to an exemplary embodiment of the present invention the flow chart of processing that device except that the PAN telegon or the head of gathering together is asked the position of the 3rd device tracking.Except that Fig. 2 and 3, may need other operation.May invade privacy of user owing to follow the tracks of the position of other devices, can be sent out so request is followed the tracks of in the position.But follow the tracks of the position of reference unit 401 request units 102.At this moment, device 401 can be included in (S251) in this frame with its identifier with to the request of the identifier of tracked device.Telegon (head of gathering together) 11 receives the detection of call claim frame and sends it to tracked device 102 (S252).Tracked device 102 has known that reference unit 401 wants to follow the tracks of its position.As " follow the tracks of device 401 request positions.You allow the position to follow the tracks of? " message can be shown to the user of tracked device 102.If the user sees this message and allow the position to follow the tracks of, comprise that then the frame (detection of call acknowledgement frame) of the temporal information of the position that is used to follow the tracks of it is sent out (S255).Reference unit 401,402 receives these detection of call acknowledgement frames, and the compute location data also send to telegon (head of gathering together) 11 (S257) with these data.Telegon 11 sends to reference unit 401 (S260) with the positional information of tracked device 102 subsequently.
Yet when when operation S253 user does not allow the position to follow the tracks of, device 102 sends to telegon 11 and reference unit 401,402 (S256) with the detection of call frame that rejects response.
In Fig. 4, the information that allows or refuse detection of call to reply about the user of tracked device 102 can be provided with in advance, and it can be to each device or to the specific device setting.Be provided with by this, the user can keep his/her privacy, follow the tracks of inquiry and need not response position.
Fig. 5 is the flow chart that the processing of the position of following the tracks of the tracked device outside being present in the PAN telegon resident gathering together is shown according to an exemplary embodiment of the present invention.The embodiment of Fig. 5 comprises the situation of the position of the tracked device 102 of PAN telegon 31 requests, and the situation of the position of the tracked device 102 of another device request.
If the position is followed the tracks of and is allowed to, comprise that then the detection of call acknowledgement frame of positional information is sent to reference unit 301,302 and gathers together 11 (S315).The locator data that reference unit will obtain from the information the detection of call acknowledgement frame that is included in reception sends to 11 (S321) that gather together.Consequently, gather together and 11 known that the position of tracked device 102 and its send to PAN telegon 31 (S331) with the testing result frame.
In addition, in this case, even whether he allows the position to follow the tracks of with reference to the described user who does not inquire tracked device of Fig. 3 as previous, this processing also can be carried out.Even existence rejects response from the user's, the detection of call acknowledgement frame also can be sent to PAN telegon 31.
If if the 3rd device is attempted following the tracks of the position of tracked device 102 or position that PAN telegon 31 is not forced other devices is followed the tracks of by PAN telegon 31, the user of then tracked device 102 can prevent that its position is tracked.Here, tracked device 102 sends to the detection of call frame that rejects response reference unit 301,302 and gathers together 11 (S316).11 detection of call with reception of gathering together reject response, and frame sends to PAN telegon 31 (S317) and PAN telegon 31 has known that tracked device can not be tracked.In addition, the detection of call frame that rejects response can be sent to the device that other ask the position of tracked device 102.
Fig. 6 is the flow chart that the processing that the setting position of the use relay of another exemplary embodiment according to the present invention follows the tracks of is shown.The PAN telegon can directly send to the head of gathering together with the detection of call request, and perhaps the PAN telegon can send it to this head of gathering together indirectly by another head of gathering together.Therefore, receive concurrent censorship and survey the effect that the head of gathering together of call request frame plays relay.
In Fig. 6, PAN telegon 31 sends to 51 (S411) that gather together with the detection of call claim frame.Gather together and 51 this detection of call claim frame sent to the 3rd gather together 11 (S412) and gather together and 11 follow the tracks of the position that is present in its device in gathering together.Here, shown in the example of Fig. 2 to 5, allow or refuse the position and follow the tracks of according to tracked device, diverse ways is performed.
When the tracked device of operation S414 allows its position tracked, gather together 11 in position that operation S420 calculates tracked device, follow the tracks of this position and the testing result frame is sent to 51 (S431) that gather together, it also sends to testing result PAN telegon 31_ (S432).
When following the tracks of in the tracked device of operation S414 refusal position, gathering together 11 produces the detection of call frame that rejects response at operation S422, and sends this detection of call frame (S434) that rejects response.Receive the reject response relay 51 of frame of this detection of call this detection of call frame that rejects response is sent to PAN telegon 31 (S436).
There are a plurality of position track algorithms that are used.
Fig. 7 illustrates the conceptual illustration of following the tracks of according to the position of passing through the time of advent (TOA) method of the embodiment of the invention.The TOA method is measured the signal that sends between tracked device 101 and other network equipments 11,301,302 time of delivery calculates distance.Can come the picked up signal time of delivery by the difference between the transmitting time (for example, detecting beginning and detection of call certainly replys) of frame.By calculating this difference and knowing the speed of the signal that comprises this frame, it is obtained as three sphere at their center to have a network equipment 11,301,302.Need three devices to carry out the calculating of the method.If at least three reference units send this value, then can to select to be judged be the most accurate three data values to telegon 11.In one embodiment, the accuracy of these data values can be judged by the signal strength signal intensity that receives.For example, table 1 as follows is listed four devices 11,301,302,307 and is installed the RSS and the locator data of the signal that sends by these.Because the device 307 of table 1 has the signal strength signal intensity of the most weak reception, so its be left in the basket (locator data of installing since then may be inaccurate).
Table 1-RSS value and locator data
| Device | RSS | Locator data |
| (m) | ||
| 11 | 70 | 15 |
| 301 | 80 | 10 |
| 302 | 90 | 8 |
| 307 | 30 | 10 |
Yet the signal strength signal intensity of reception is exemplary, and reference unit can be determined according to other characteristics of distorted signals or this signal.
Fig. 8 illustrates according to an exemplary embodiment of the present invention and follows the tracks of by the position that arrives time difference (TDOA) method.The difference that the TDOA method was measured between time of advent of two signals is determined the position, and it comprises forward link method of being made up of a plurality of signal sources and receiver and the contrary link method of being made up of a signal source and a plurality of receiver.The basic principle of TDOA is a signal arrival time difference and be directly proportional to the difference the distance of receiver from two signal sources.These are apart from being calculated, and selected with the receiver on the equidistant hyperbola that promptly to be positioned at two signal sources be the center of two signal sources.At this moment, each base station must be synchronous, and the time synchronized of base station uses satellite clock to realize.Obtain two hyperbolas from three signal sources, and the joining of two curves is positions of receiver.
Fig. 8 shows the application of TDOA at IEEE 802.15.4.Here, the hyperbola that obtains from network equipment 11,301 is the position of tracked device 101 with obtaining hyp intersection point from network equipment 11,302.In order to obtain the intersection point between the hyperbola, the TOA data send to telegon 11 by grid of reference device 301,302.If telegon 11 receives several signals, then they can be according to RSS choice device and compute location data.
Except the method for describing in Fig. 7 and 8, arriving angle (AOA) method and radio frequency (RF) fingerprint method can be used.The AOA method is measured the incidence angle of the frame signal that sends from tracked device, and in this side up search.In the present embodiment, can among the value of measuring by several network equipments, select the strongest signal.
The signal that the RF fingerprint method give to receive takes snapshot, and analyzes this snapshot and extracts unique feature of this signal, and this signal and existing data base are relatively come location receivers, to obtain the characteristic value by the frame of tracked device transmission.
The position track algorithm of Xie Shiing only is exemplary in this manual.
Fig. 9 illustrates the frame format of the MAC layer that is used to embody position tracking function according to an exemplary embodiment of the present invention.Fig. 9 illustrates an embodiment who uses the TOA algorithm, and can change according to location tracking method.
The frame control of IEEE 802.15.4 command frame 700 is 16 bits, and comprises type, address field and the controlled flag of frame.Sequence number is the unique identifier of frame.Address field comprises recipient's the PAN identifier/address field and the PAN identifier/address field of transmit leg.The command frame identifier illustrate which order just is being performed and can employing table 720 in the value that shows.0x0b to 0xff is retained and can be in definition in the future.Therefore, the position trace command can use these reserved identifier to define.
The value that needs the order payload to come fill order and order payload to show in can employing table 710.
The start frame of detection certainly 711 that sends when tracked device is wanted to know its position has command frame identifier 0x21, and corresponding to the order payload of forming by tracked device identification and frame transmitting time.Other reference units (comprising telegon) that receive this frame can use frame transmission and time of reception to calculate distance.This distance or data are sent to telegon, thereby have disclosed the position of tracked device.
Result calculated sends by the detection result frame certainly 712 of the order payload that has command frame identifier 0x22 and be made up of positional information and tracked device identification.
Next, will the reject response structure of frame 717 of detection of call claim frame 713, detection of call acknowledgement frame 714 that use and the detection of call that sends be described when telegon wants to know the position of particular network device under the situation of refusal position tracking.When search is present in tracked device in the network of transmitter and when search is not present in reference unit in the network of transmitter, transmission detection of call claim frame 713.The order payload comprises the identifier of just searched network equipment.The tracked device that receives this frame sends detection of call acknowledgement frame 714 to disclose its position.The order payload that is included in this is as detecting identifier and the transmitting time that start frame 711 can be tracked device certainly.On the other hand, when followed the tracks of tracked device refusal position, the detection of call frame 717 that rejects response was sent out.The order payload that is included in this can be the identifier of tracked device.
Comprise the master data that is used for the position tracking from detecting start frame 711 and detection of call acknowledgement frame 714.When using TOA method or TDOA method, master data can be a transmitting time, and when using the RF fingerprint method, master data can be a signal strength signal intensity.By making up this information, the position of tracked device can be calculated.Locator data frame 715 provides the data that will calculate to send to the function of telegon.The data of calculating can be the time differences between frame sends and receives, and perhaps it can be from time difference information calculated distance information.In addition, the data of calculating can be the incidence angle of binding signal and the information of range information.In addition, the order payload can be by being included in from detecting locator data, the RSS of the information calculations in start frame 711 and the detection of call acknowledgement frame 714 and the position of having calculated the reference unit of these data.RSS is used to extract the most reliable data when several network equipments send the data of calculating.Therefore, the content of payload can change according to the position track algorithm.In addition, because the data of calculating are relevant with the position of reference unit, so need the positional information of reference unit.If the telegon of network is stored all positions that are present in the device in its network, then the position of reference unit need not be sent out and can change according to the concrete condition of telegon.
Use testing result frame 716 when when the PAN telegon that the head of gathering together that connects when network equipment is followed the tracks of in the position of request particular network device is present among this PAN different with this network equipment PAN positional information being sent to the PAN telegon.Gather together head with command frame and comprise that the identifier of PAN identifier, tracked device and the payload of positional information send to the PAN telegon.
Above-mentioned order is to be used for embodying the exemplary embodiment of use at location recognition, testing result, location recognition request and the positional information frame of the claim of this explanation.From detecting start frame 711 and detection of call acknowledgement frame 714 are examples of location recognition frame, testing result frame the 712, the 716th, the example of testing result frame.Detection of call claim frame 713 is examples of location recognition claim frame, and locator data frame 715 is examples of positional information frame.
The device identification of order, for example the device identification by 713 definition of detection of call claim frame can comprise many identifier information by several different methods.That is, device identification can comprise the identifier of tracked device, the identifier of the device that follows the tracks of the request position.In addition, when another device in gathering together of search, outside the removal apparatus identifier, the identifier that target is gathered together should be comprised.
Figure 10,11, the 12nd illustrates the block diagram of the order payload of frame according to an exemplary embodiment of the present invention.
Figure 10 shows that identifier information in the payload of detection of call claim frame is according to condition changing.Under the situation of Fig. 3, because the tracked device of head search of gathering together, so frame 7131 only comprises the identifier of tracked device.Under the situation of Fig. 4, because reference unit is searched for tracked device, so frame 7132 comprises the identifier of the device that follow the tracks of the request position and the identifier of tracked device.Under the situation of Fig. 5 and 6, because just tracked device is present in during another gathers together, so the identifier of the device that frame 7133 is constructed to comprise that the request position is followed the tracks of, gather together identifier and the identifier of the device of the object followed the tracks of as the position.In order to distinguish each frame, detecting sign can be included in the command frame.
Figure 11 shows that identifier information in the payload of detection of call acknowledgement frame is according to condition changing.Similar to FIG. 10, under the situation of Fig. 3, frame 7141 comprises the identifier and the transmitting time of tracked device.Under the situation of Fig. 4, because reference unit is searched for tracked device, so frame 7142 comprises the identifier of the device that follow the tracks of the request position, the identifier and the transmitting time of tracked device.Under the situation of Fig. 5 and 6, because just tracked device is present in during another gathers together, so frame 7143 comprises the identifier and the transmitting time of the identifier of the device that follow the tracks of the request position, the identifier of gathering together, just tracked device.In order to distinguish each frame, checkmark can be included in the command frame.
Figure 12 shows that detection of call rejects response identifier information in the payload of frame according to condition changing.0x27 is the reject response identifier of frame of detection of call.The structural similarity of the detection of call acknowledgement frame of this structure and Figure 11, but because the position tracking is rejected, so not comprising, it does not relate to the information that follow the tracks of the position, as transmission time information.The detection of call frame that rejects response is to be used to announce the frame that follow the tracks of tracked device refusal position.Under the situation of Fig. 3, the identifier 7151 of still refusing the device of position tracking as the object of position tracking is comprised.Under the situation as Fig. 4, when followed the tracks of tracked device refusal position, frame 7152 was sent out, and this frame comprises the identifier of the device that follow the tracks of the request position and the identifier of the device of the object followed the tracks of as the position.When followed the tracks of device request position in another is gathered together, frame 7153 was sent out, and it comprises that request unit resides in wherein the identifier of gathering together of gathering together, device identification and the identifier of the device of the object followed the tracks of as the position.
According to the present invention, the position of device can be tracked in the wireless network based on telegon.
Specifically, provide can executing location be followed the tracks of under the IEEE 802.15.4a environment agreement.
Although the present invention who shows particularly and describe with reference to its exemplary embodiment, but it should be appreciated by those skilled in the art, do not breaking away under the situation that is defined by the following claims the spirit and scope of the present invention, can carry out various changes on form and the details it.It only is describing significance that these exemplary embodiments should be considered to, and is not to limit purpose.Therefore, scope of the present invention be can't help detailed description of the present invention and is limited, and is defined by the following claims, and all differences in this scope will be interpreted as comprising in the present invention.
Claims (51)
1, a kind of based on the location tracking method in the wireless network of telegon, comprising:
To comprise that by the device that is connected with wireless network first frame of identifier and temporal information sends to wireless network to disclose the positional information of this device; With
Reception comprises from the acknowledgement frame of the positional information of the described device of described wireless network transmission.
2, the method for claim 1, wherein described wireless network uses IEEE 802.15.4 agreement.
3, the method for claim 1, wherein described temporal information transmitting time that is first frame.
4, the method for claim 1, wherein described identifier Media Access Control address that is described device.
5, the method for claim 1, wherein, described device is a kind of like this device, its request is used to check the detection of the existence of wireless network, receive the response detected of wireless network of the existence of self-checking wireless network, request is connected to described wireless network and receives and replys from the connection of this wireless network.
6, the method for claim 1, wherein described device is a kind of like this device, and it receives the beacon of wireless network of the existence of self-checking wireless network, and request is connected to described wireless network and receives and replys from the connection of this wireless network.
7, a kind of based on the location tracking method in the wireless network of telegon, comprising:
First frame that will comprise the identifier of first device and second device sends to wireless network, so that be connected to the position that first device of wireless network is known second device; With
Receive the acknowledgement frame that comprises from second positional information of installing of described wireless network transmission by first device.
8, method as claimed in claim 7, wherein, described wireless network uses IEEE 802.15.4 agreement.
9, method as claimed in claim 7, wherein, the identifier of described first and second devices is respectively the Media Access Control address of first and second devices.
10, method as claimed in claim 7, wherein, described first device is a kind of like this device, its request is used to check the detection of the existence of wireless network, receive the response detected of wireless network of the existence of self-checking wireless network, request is connected to described wireless network and receives and replys from the connection of described wireless network.
11, method as claimed in claim 7, wherein, first device is a kind of like this device, and it receives the beacon of wireless network of the existence of self-checking wireless network, and request is connected to described wireless network and receives and replys from the connection of described wireless network.
12, a kind of based on the location tracking method in the wireless network of telegon, comprising:
Install first frame that receives from the identifier of first identifier that installs of asking comprising of wireless network second position of installing to be followed the tracks of and second device by second; With
To comprise that by second device identifier of first device, the identifier of second device and second frame of second temporal information of installing send to wireless network, as replying to first frame.
13, method as claimed in claim 12, wherein, described wireless network uses IEEE 802.15.4 agreement.
14, method as claimed in claim 12, wherein, the identifier of first and second devices is respectively the Media Access Control address of first and second devices.
15, method as claimed in claim 12, wherein, described temporal information is the transmitting time of second frame.
16, a kind of based on the location tracking method in the wireless network of telegon, comprising:
Install first frame that receives from the identifier of first identifier that installs of asking comprising of wireless network second position of installing to be followed the tracks of and second device by second;
Determine whether to allow the position to follow the tracks of; With
If allow the position to follow the tracks of, then will comprise that from second device identifier of first device, the identifier of second device and second frame of temporal information send to wireless network, as replying to first frame.
17, method as claimed in claim 16, wherein, determine that operation comprises: assessment is by the value of user's input of second device that is allowed to or refuses follow the tracks of the position.
18, method as claimed in claim 16, wherein, definite operation comprises: relatively come to determine by the value and first identifier that installs that will before be provided with in second device.
19, method as claimed in claim 16, wherein, when finding that in determining operation the position tracking is rejected, second frame comprises the identifier of first device and the identifier of second device.
20, method as claimed in claim 16, wherein, described wireless network uses IEEE 802.15.4 agreement.
21, method as claimed in claim 16, wherein, the identifier of first and second devices is respectively the Media Access Control address of first and second devices.
22, a kind of based on the location tracking method in the wireless network of telegon, comprising:
Reception is by the identifier that comprises this device of device transmission and first frame of temporal information;
Use described temporal information to obtain to be used to calculate the position calculation information of the position of described device; With
To comprise that the identifier of described device and second frame of described position calculation information send to network coordinator.
23, method as claimed in claim 22, wherein, described wireless network uses IEEE 802.15.4 agreement.
24, method as claimed in claim 22, wherein, described temporal information is the transmitting time of described first frame.
25, method as claimed in claim 24, wherein, poor between time of reception that described position calculation information is first frame and the transmitting time.
26, method as claimed in claim 22, wherein, the identifier of described device is the Media Access Control address of described device.
27, a kind of based on the location tracking method in the wireless network of telegon, comprising:
Identifier and the identifier of second device and first frame of the second setup time information of first device that follow the tracks of the position that comprises request second device that reception is sent by second device;
Use described temporal information to obtain to be used to calculate the position calculation information of second position of installing; With
To comprise that the identifier of first device, the identifier of second device and second frame of position calculation information send to network coordinator.
28, method as claimed in claim 27, wherein, described wireless network uses IEEE 802.15.4 agreement.
29, method as claimed in claim 27, wherein, described temporal information is the transmitting time of first frame.
30, method as claimed in claim 29, poor between the time of reception that wherein said position calculation information is first frame and the transmitting time of first frame.
31, a kind of based on the location tracking method in the wireless network of telegon, comprising:
Receive a plurality of frames of the position calculation information of the identifier that comprises device of automatic network and described device;
Use the position of the described device of described position calculation information calculations; With
The frame that will comprise positional information sends to described device.
32, method as claimed in claim 31, wherein, described wireless network uses IEEE 802.15.4 agreement.
33, method as claimed in claim 31, wherein, the identifier of described device is the Media Access Control address of described device.
34, a kind of based on the location tracking method in the wireless network of telegon, comprising:
The identifier of first device that follow the tracks of the position that receives ask second device comprising of automatic network, the identifier of second device and a plurality of frames of the second position calculation information of installing;
Use the position of described position calculation information calculations second device; With
The frame that will comprise the position of second device sends to first device.
35, method as claimed in claim 34, wherein, described wireless network uses IEEE 802.15.4 agreement.
36, method as claimed in claim 34, wherein, the identifier of described first and second devices is respectively the Media Access Control address of first and second devices.
37, a kind of based on the address tracking in the wireless network of telegon, comprising:
First frame of the identifier of first device that follow the tracks of the position that receives ask second device comprising of automatic network and the identifier of second device;
Described first frame is sent to second device of described network;
Be used to announce the position from the second device reception and follow the tracks of unaccepted second frame; With
Described second frame is sent to described first device.
38, method as claimed in claim 37, wherein, described wireless network uses IEEE 802.15.4 agreement.
39, method as claimed in claim 37, wherein, the identifier of described first and second devices is respectively the Media Access Control address of first and second devices.
40, a kind of based on the location tracking method in the wireless network of telegon, comprising:
First frame that comprises first identifier that installs and second identifier that installs that reception is sent by first device is so that the telegon of first wireless network can be followed the tracks of second device;
To comprise that by the telegon of described first wireless network second frame of identifier, described first identifier that installs and described second identifier that installs of described first wireless network sends to the telegon of second wireless network;
Telegon by described first wireless network receives by the identifier of the identifier that comprises described first wireless network of the telegon transmission of described second wireless network, the identifier of described first device, described second device and the 3rd frame of described second positional information of installing, as replying described second frame; With
Telegon by described first wireless network will comprise that the 4th frame of the positional information of described second device sends to first device.
41, method as claimed in claim 40, wherein, described first and second wireless networks use IEEE 802.15.4 agreement.
42, method as claimed in claim 40, wherein, the identifier of described first and second devices is respectively the Media Access Control address of first and second devices.
43, a kind of based on the location tracking method in the wireless network of telegon, comprising:
First frame that comprises first identifier that installs and second identifier that installs that reception is sent by first device is so that the telegon of first wireless network can be followed the tracks of described second device;
To comprise the identifier of the identifier of described first wireless network, described first device and the telegon that described second identifier that installs sends to described second wireless network by the telegon of described first wireless network;
If having received the described second device refusal position of second frame follows the tracks of, then the telegon by described first wireless network receives the identifier of the identifier that comprises described first wireless network, described first device and the 3rd frame of described second identifier that installs, as replying of second frame; With
Telegon by described first wireless network will comprise that the 4th frame of the information of following the tracks of about the described second device refusal position sends to described first device.
44, method as claimed in claim 43, wherein, described first and second wireless networks use IEEE 802.15.4 agreement.
45, method as claimed in claim 43, wherein, the identifier of described first and second devices is respectively the Media Access Control address of first and second devices.
46, a kind of based on the location tracking method in the wireless network of telegon, comprising:
Receive first frame of the identifier of the identifier of first device of the position of the identifier that comprises first wireless network that the telegon by first wireless network sends, request second device following the tracks of and second device by the telegon of second wireless network;
To comprise that by the telegon of described second wireless network identifier of the identifier of described first wireless network, described first device and the identifier of second device send to second device that is connected with second wireless network;
Receive the identifier of the identifier of the identifier that comprises first wireless network from described second wireless network, described first device, described second device and a plurality of second frames of the second position calculation information of installing by the telegon of described second wireless network;
Use the position of described second device of described position calculation information calculations of second device by the telegon of described second wireless network; With
To comprise that by the telegon of second wireless network the 4th frame of positional information of described second device of the identifier of the identifier of the identifier of described first wireless network, described first device, described second device and calculating sends to the telegon of described first wireless network.
47, method as claimed in claim 46, wherein, described first and second wireless networks use IEEE 802.15.4 agreement.
48, method as claimed in claim 46, wherein, the identifier of described first and second devices is respectively the Media Access Control address of first and second devices.
49, a kind of based on the location tracking method under the wireless network of telegon, comprising:
Reception is by the identifier that comprises first wireless network of the telegon transmission of first wireless network, first identifier that installs of asking the second position tracking of installing and first frame of second identifier that installs;
To comprise that by the telegon of second wireless network second frame of identifier, described first identifier that installs and described second identifier that installs of described first wireless network sends to the telegon of the 3rd wireless network;
Receive the identifier of the identifier of the identifier that comprises described first wireless network that sends by described the 3rd wireless network, described first device, described second device and the 3rd frame of described second positional information of installing by the telegon of described second wireless network; With
To comprise that by the telegon of described second wireless network the 4th frame of identifier, described second identifier that installs and described second positional information of installing of the identifier of described first wireless network, described first device sends to the telegon of described first wireless network.
50, method as claimed in claim 49, wherein, described first, second uses IEEE 802.15.4 agreement with the 3rd wireless network.
51, method as claimed in claim 49, wherein, the identifier of described first and second devices is respectively the Media Access Control address of first and second devices.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567823A (en) * | 2008-04-23 | 2009-10-28 | 三星电子株式会社 | Communication system using ZigBee and method for controlling same |
| CN102668649A (en) * | 2009-12-10 | 2012-09-12 | 诺基亚公司 | Network discovery in wireless communication systems |
| US8774021B2 (en) | 2009-12-10 | 2014-07-08 | Nokia Corporation | Data-related task support in wireless communication systems |
| US8804589B2 (en) | 2011-10-14 | 2014-08-12 | Nokia Corporation | Adaptive awake window |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100860029B1 (en) | 2005-05-23 | 2008-09-25 | 엘지전자 주식회사 | Positioning performance method and positioning system |
| KR100756554B1 (en) * | 2006-07-25 | 2007-09-07 | 중앙대학교 산학협력단 | Home-network service system using portable device and thereof method |
| KR100800605B1 (en) * | 2006-10-26 | 2008-02-04 | 한양대학교 산학협력단 | Rf id reader having ad-hoc networking interface and method for transmitting data thereof |
| KR100896320B1 (en) * | 2006-12-04 | 2009-05-07 | 한국전자통신연구원 | Device and method for purchasing location |
| KR20090034711A (en) | 2007-10-04 | 2009-04-08 | 한국전자통신연구원 | Method for measuring node location using medium access control layer of wireless personal area network |
| KR101070615B1 (en) * | 2010-11-22 | 2011-10-07 | 주식회사 정보보호기술 | System and method to detecting wi- fi user's 3d location |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000023236A (en) | 1998-06-29 | 2000-01-21 | Nec Corp | Terminal position tracking system, terminal position tracking method and recording medium |
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2004
- 2004-10-27 KR KR1020040086226A patent/KR100679021B1/en not_active IP Right Cessation
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101567823A (en) * | 2008-04-23 | 2009-10-28 | 三星电子株式会社 | Communication system using ZigBee and method for controlling same |
| CN101567823B (en) * | 2008-04-23 | 2014-01-22 | 三星电子株式会社 | Communication system using ZigBee and method for controlling same |
| CN102668649A (en) * | 2009-12-10 | 2012-09-12 | 诺基亚公司 | Network discovery in wireless communication systems |
| US8774021B2 (en) | 2009-12-10 | 2014-07-08 | Nokia Corporation | Data-related task support in wireless communication systems |
| US8842605B2 (en) | 2009-12-10 | 2014-09-23 | Nokia Corporation | Network discovery in wireless communication systems |
| CN102668649B (en) * | 2009-12-10 | 2015-04-22 | 诺基亚公司 | Network discovery in wireless communication systems |
| US9307551B2 (en) | 2009-12-10 | 2016-04-05 | Nokia Technologies Oy | Data-related task support in wireless communication systems |
| US8804589B2 (en) | 2011-10-14 | 2014-08-12 | Nokia Corporation | Adaptive awake window |
Also Published As
| Publication number | Publication date |
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| KR100679021B1 (en) | 2007-02-06 |
| KR20060009795A (en) | 2006-02-01 |
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