CN101369942A - Method for guaranteeing communication time slot expansion of short distance wireless sensing network - Google Patents
Method for guaranteeing communication time slot expansion of short distance wireless sensing network Download PDFInfo
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- CN101369942A CN101369942A CNA200810042990XA CN200810042990A CN101369942A CN 101369942 A CN101369942 A CN 101369942A CN A200810042990X A CNA200810042990X A CN A200810042990XA CN 200810042990 A CN200810042990 A CN 200810042990A CN 101369942 A CN101369942 A CN 101369942A
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Abstract
The invention relates to a guarantee communication time slot extension method for a short distance wireless sensor network comprising the following steps: (1) transmitting a guarantee communication time slot application control frame through a communication device in a zigbee network, realizing a guarantee communication time slot distribution application of a peer to peer communication in the network; (2) realizing the guarantee communication time slot distribution application of a multicast communication in the network through the transmission of the guarantee communication time slot application control frame by the communication device in the zigbee network; (3) realizing the time domain and the frequency domain resource distribution of the guarantee communication time slot by inducting a wireless channel seletion function in a guarantee communication time slot descriptor; (4) realizing a conflict-free reliable communication in a personal area network through the unified management of the distribution and rescission of the guarantee communication time slot of the communication mode by a personal area network coordinator. The method of the invention supports the reliable wireless access of the peer to peer communication and a concurrent data communication in the network and the multicast communication in the network, and better supports the industrial and service wireless application.
Description
Technical field
The invention belongs to communication technique field, particularly relate to a kind of method of guarantee communication time slot expansion of short distance wireless sensing network.
Background technology
Purple-bee technology (Zigbee) is a kind of short-distance wireless communication technology with uniform technical standards, and this technology can be applied in the wireless sense network.Its physical layer and medium Access Layer agreement are the IEEE802.15.4 consensus standard, network layer is formulated by purple-bee technology alliance, the Application and Development of application layer is according to user's oneself application need, its application is developed and utilized, so this technology can provide motor-driven, networking mode flexibly for the user.
The medium Access Layer protocol specification of the IEEE 802.15.4 standard that the medium Access Layer of purple-bee technology is adopted.The medium Access Layer is handled the access of all physical layer wireless channels, and its major function is:
Network coordinator produces networked beacons;
With beacon synchronization;
Support the foundation and the disconnection of territory net (PAN) link;
For the fail safe of equipment provides support;
The channel access way adopts conflict to avoid the carrier monitoring multiple access to insert (CSMA/CA) mechanism;
Handle and safeguard the communication time slot mechanism that ensures;
Between the medium Access Layer entity of two equities, provide a reliable communication link.Wherein, ensure that communication time slot mechanism is one of characteristic in the medium Access Layer technology in the existing 802.15.4 standard, the transfer of data that requires for the higher quality of service between equipment and the telegon (QoS) provides reliable support.But existing guarantee communication time slot mechanism exists following deficiency:
Only a territory net telegon can distribute the guarantee communication time slot, and ensures that communication time slot only can be used for the communication of an associated equipment of territory net telegon;
Single superframe maximum can only distribute 7 to ensure communication time slot;
Ensure the not peer-to-peer communications between the support equipment of communication time slot, do not support cast communication;
These deficiencies of guarantee communication time slot have limited the peer-to-peer communications between the network equipment, the application of especially a plurality of concurrent transfer of data, and data all need to transmit from telegon, increased communication overhead, reduce the communication bandwidth service efficiency, reduced throughput, increased propagation delay time.
Summary of the invention
Technical problem to be solved by this invention provides a kind of reliable radio switch-in method of supporting to net interior peer-to-peer communications and concurrent data communication, and can support cast communication in the net, the method for the guarantee communication time slot of a kind of short distance wireless sensing network of supporting industry and service trade wireless application expansion preferably.
The technical solution adopted for the present invention to solve the technical problems is: a kind of method of guarantee communication time slot expansion of short distance wireless sensing network is provided, comprises the following steps:
(1) ensures communication time slot application control frame by the transmission of ZigBee network communication equipment, realize the guarantee communication time slot distribution application of peer-to-peer communications in the net;
(2) send the guarantee communication time slot that ensures cast communication in the communication time slot application control frame realization net by the ZigBee network communication equipment and distribute application;
(3) in ensureing the communication time slot descriptor, introduce the wireless channel selection function, realize ensureing the time domain and the frequency domain resource distribution of communication time slot;
(4) distribution and the releasing of the guarantee communication time slot of the above-mentioned communication pattern of individual territory net telegon unified management realize not having the conflict reliable communication in the territory net.
Described communication equipment can be a territory net coordinator unit and ZigBee network communication equipment as the transceiver that ensures communication time slot, can also be the ZigBee network communication equipment;
Described territory net telegon distributing when ensureing communication time slot, and the transmitting and receiving device of guarantee communication that is distributed in same time slot is all inequality, and the frequency channels difference is greater than the allocated channel difference threshold, and this constant is that network sets in advance.
The distribution of described guarantee communication time slot comprises the following steps:
(a) equipment receives that child node ensures that communication time slot distributes application, and calculating can distribute time interval resource;
(b) ensure the communication time slot distributive condition, then processing end if do not satisfy; Ensure the communication time slot distributive condition if satisfy, then enter step (c);
(c) scheduling at superframe inserts period distribution time slot, allocated channel, the distribution of broadcasting GTS in beacon frame;
(d) processing finishes.
The releasing of described guarantee communication time slot comprises the following steps:
(a) equipment receives that child node ensures communication time slot releasing request for allocation;
(b) regain the time slot channel resource;
(c) ensure the communication time slot redistribution process;
(d) notice ensures that the access slot releasing distributes in beacon frame.
The guarantee communication time slot that the present invention proposes has following expansion:
Individual territory net telegon and other telegons all can be managed the operational support communication time slot, and management issue is identical with existing IEEE802.15.4 standard code;
The transceiver that ensures communication time slot can be a territory net telegon and general device, can also be general device and general device;
The attribute parameter that ensures communication time slot increases communication channel (channel offset) item except original initial time slot/length/direction, wouldn't support to ensure the channel hopping function of communication time slot;
Individual territory net telegon or telegon need be considered the available frequencies channel when distributing the guarantee communication time slot, the guarantee communicating requirement transmitting and receiving device that is distributed in same time slot is all inequality, require the frequency channels difference greater than allocated channel difference threshold (aMinOffsetThreshold) simultaneously, this constant is that network sets in advance.
Except that above-mentioned expansion, ensure that other functions of communication time slot are identical with the guarantee communication time slot definition of existing IEEE 802.15.4 (2006).The purpose that guarantee communication time slot transceiver is expanded to general device and general device is to support the clean culture and the multicast functionality of the guarantee communication time slot between the peer device.To ensureing that the expansion that communication time slot uses adds the multichannel selection function, can realize the increase of network throughput and the minimizing of communication delay.
Beneficial effect
The reliable wireless access of peer-to-peer communications and concurrent data communication in the present invention can support to net, and can support cast communication in the net, the method for the guarantee communication time slot of a kind of short distance wireless sensing network of supporting industry and service trade wireless application expansion preferably.
Description of drawings
Fig. 1 is the allocation process flow chart of GTS of the present invention.
Fig. 2 removes the allocation process flow chart for GTS of the present invention.
Fig. 3 is a GTS allocation algorithm flow chart of the present invention.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As shown in Figure 1, the application that ensures communication time slot distributes
(1) the guarantee communication time slot between a general device and the territory net telegon distributes: general device is as transmit leg, send the guarantee communication time slot request control frame of P2C pattern (general device is to the net telegon application of individual territory), individual territory net telegon distributes when ensureing the communication time slot time slot, consider the deviant of its communication channel, other processes are identical with IEEE 802.15.4 (2006) standard definition.
(2) clean culture between general device and the general device ensures that communication time slot distributes: general device sends the guarantee communication time slot request control frame of P2P pattern (general device is to the general device application), require receiving node to send and reply (ACK) frame, individual territory net telegon determines whether to distribute the guarantee communication time slot according to whether receiving the guarantee communication time slot request control frame and the acknowledgement frame of pairing.
(3) multicast between general device and general device or the individual territory net telegon ensures that communication time slot distributes: general device sends the guarantee communication time slot request control frame of MCT (multicast) pattern, require a territory net telegon to send acknowledgement frame, individual territory net telegon determines whether distribute to ensure communication time slot according to application, and in superframe note.
As shown in Figure 2, ensure the de-allocation of communication time slot
(1) the guarantee communication time slot de-allocation of P2P pattern: general device sends to individual territory net telegon and ensures communication time slot application control frame, the content of characteristic type (Characteristic Type) subdomain is set to the releasing pattern, simultaneously adding purpose equipment short address in destination device address (Destination Device Address).After individual territory net telegon receives and ensures communication time slot application control frame, send acknowledgement frame immediately, simultaneously in the beacon frame of next superframe, the initial time slot subdomain (Start Slot) in the descriptor is changed to 0, can finishes general device and recipient's guarantee communication time slot de-allocation.
(2) the guarantee communication time slot de-allocation under MCT (multicast) pattern: general device sends and ensures communication time slot application control frame, and the pattern of setting is multicast, the multicast address of adding purpose equipment in the destination device address.After individual territory net telegon receives and ensures communication time slot application control frame, send acknowledgement frame at once, and in the beacon frame of next superframe, the initial time slot subdomain (Start Slot) of this descriptor is made as 0, can finish general device and recipient's guarantee communication time slot de-allocation.
Guarantee communication time slot release method under the P2C pattern is identical with IEEE 802.15.4 (2006).The beacon frame that above releasing process all requires the continuous broadcasting of a territory net telegon to comprise releasing guarantee communication time slot information reaches predetermined number of times.
Ensure the time slot and the channel allocation mechanism of communication time slot
Ensure communication time slot parameter table
| Name variable | Span | Explanation |
| Source address | 0x0001~0xfffe | Sender address |
| Destination address | 0x0001~0xfffe | The recipient address |
| Initial time slot | aMinCapSlotNum~ aMaxActi?veSlotNum | The beginning time slot |
| Length | 1~maxGTSSlot | Ensure the number of the shared continuous superframe time slot of communication time slot |
| Direction | Rx?or?Tx | Ensure the directed sign of communication time slot, be reception or transmission |
| Side-play amount | 1~maxChannelOffset | Channel offset |
| Pattern | P2C，P2P，MCT | Ensure the communication time slot pattern |
As shown in Figure 3, channel and time slot allocation mode are:
At the guarantee communication time slot of P2C pattern, the channels offset value is got the channel value that competition access slot (CAP) uses;
At the guarantee communication time slot of P2P pattern, telegon distributes guarantee communication time slot and channel offset according to guarantee communication time slot claim frame that receives and acknowledgement frame, and the guarantee communication channel of P2P pattern will be distinguished mutually with the channel of P2C pattern;
Guarantee communication time slot at the MCT pattern, telegon was determined the distribution of time slot and channel according to former distribution result, ensure that in this case communication time slot requirement multicast address equipment does not all participate in the communication of the guarantee communication time slot of any P2C or P2P pattern, the distribution of channel will be distinguished mutually with the channel allocation of P2C pattern.
Claims (5)
1. the method for the guarantee communication time slot of short distance wireless sensing network expansion comprises the following steps:
(1) ensures communication time slot application control frame by the transmission of ZigBee network communication equipment, realize the guarantee communication time slot distribution application of peer-to-peer communications in the net;
(2) send the guarantee communication time slot that ensures cast communication in the communication time slot application control frame realization net by the ZigBee network communication equipment and distribute application;
(3) in ensureing the communication time slot descriptor, introduce the wireless channel selection function, realize ensureing the time domain and the frequency domain resource distribution of communication time slot;
(4) distribution and the releasing of the guarantee communication time slot of the above-mentioned communication pattern of individual territory net telegon unified management realize not having the conflict reliable communication in the territory net.
2. the method for the guarantee communication time slot of a kind of short distance wireless sensing network according to claim 1 expansion, it is characterized in that: described network communication equipment can be a territory net coordinator unit and ZigBee network communication equipment as the transceiver that ensures communication time slot, can also all be ZigBee network communication equipments.
3. the method for the guarantee communication time slot of a kind of short distance wireless sensing network according to claim 1 expansion, it is characterized in that: described territory net telegon is when distributing the guarantee communication time slot, the transmitting and receiving device of guarantee communication that is distributed in same time slot is all inequality, the frequency channels difference is greater than the allocated channel difference threshold, and this constant is that network sets in advance.
4. the method for the guarantee communication time slot of a kind of short distance wireless sensing network according to claim 1 expansion, it is characterized in that: the distribution of described guarantee communication time slot comprises the following steps:
(a) equipment receives that child node ensures that communication time slot distributes application, and calculating can distribute time interval resource;
(b) ensure the communication time slot distributive condition, then processing end if do not satisfy; Ensure the communication time slot distributive condition if satisfy, then enter step (c);
(c) scheduling at superframe inserts period distribution time slot, allocated channel, the distribution of broadcasting GTS in beacon frame;
(d) processing finishes.
5. the method for the guarantee communication time slot of a kind of short distance wireless sensing network according to claim 1 expansion, it is characterized in that: the releasing of described guarantee communication time slot comprises the following steps:
(a) equipment receives that child node ensures communication time slot releasing request for allocation;
(b) regain the time slot channel resource;
(c) ensure the communication time slot redistribution process;
(d) notice is removed the communication support time slot allocation in beacon frame.
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| CN102547871A (en) * | 2012-02-07 | 2012-07-04 | 华为技术有限公司 | Method and device for consulting resource in D2D (Device To Device) communication |
| CN103476058A (en) * | 2013-09-25 | 2013-12-25 | 广州中国科学院软件应用技术研究所 | Data communication method and device in ZIGBEE network |
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| CN104427619A (en) * | 2013-09-10 | 2015-03-18 | 富士通株式会社 | Time slot allocation method and device |
| CN105357768A (en) * | 2014-08-19 | 2016-02-24 | 邵贵阳 | Method for realizing wireless multi-channel MAC protocol |
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| WO2011038692A1 (en) * | 2009-09-30 | 2011-04-07 | 华为技术有限公司 | Network node configuration information processing method, network node, and communication system |
| CN103621045A (en) * | 2011-05-12 | 2014-03-05 | 诺基亚西门子通信公司 | Content distribution |
| CN103621045B (en) * | 2011-05-12 | 2018-05-15 | 诺基亚通信公司 | Content distribution |
| US9977838B2 (en) | 2011-05-12 | 2018-05-22 | Nokia Solutions And Networks Oy | Content distribution |
| CN102547871A (en) * | 2012-02-07 | 2012-07-04 | 华为技术有限公司 | Method and device for consulting resource in D2D (Device To Device) communication |
| CN102547871B (en) * | 2012-02-07 | 2015-07-29 | 华为技术有限公司 | Resource negotiation method and apparatus in a kind of D2D communication |
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| CN103476058A (en) * | 2013-09-25 | 2013-12-25 | 广州中国科学院软件应用技术研究所 | Data communication method and device in ZIGBEE network |
| CN105357768A (en) * | 2014-08-19 | 2016-02-24 | 邵贵阳 | Method for realizing wireless multi-channel MAC protocol |
| CN105357768B (en) * | 2014-08-19 | 2018-10-26 | 邵贵阳 | A kind of implementation method of Wireless Multi-Channel MAC protocol |
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