CN102340838A - Medium access control method for prolonging network lifetime in wireless body area network - Google Patents
Medium access control method for prolonging network lifetime in wireless body area network Download PDFInfo
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Abstract
The invention discloses a medium access control method for prolonging network lifetime in a wireless body area network, which mainly solves the problem that network topology lacks the self-adaptive adjustment capability based on the current residual energy of a node in the existing research on the medium access control of the wireless body area network. The method is implemented by the steps as follows: under a normal communication state, a node immediately requests a relay towards a network coordinating point when detecting the current residual energy is lower than an energy threshold value; the network coordinating point selects the relay for the relay request node in the whole network through a relay selection superframe structure; the network topology is changed from a star structure into a tree structure; and a medium access control layer adjusts a next-hop superframe structure in accordance with the topology. Compared with the existing method for prolonging network lifetime in a wireless body area network, the invention can realize the self-adaptive adjustment of the network topology without increasing additional relay nodes, thereby prolonging the network lifetime of the whole wireless body area network.
Description
Technical field
The invention belongs to communication technical field; Relate to media access control method; Specifically a kind of media access control method that is used for wireless body area network, this method prolongs network lifetime to greatest extent under the prerequisite of access channel successfully that guarantees to divide into groups.
Background technology
Wireless body area network (WBAN, Wireless Body Area Network) be a kind of be the center with the human body, by be distributed on the person, on the clothing even each node of body interior and the cordless communication network that personal terminal is formed.In the wireless near field communication field; Though there is Wireless Personal Network WPAN technology; But this notion of body area network has further expanded to the short distance wireless communication technology the communication between the various kinds of sensors that is deployed on the human body and in the human body, so its transmission range is shorter.WBAN is of wide application; From remote medical monitoring; Calculate alternately to human body, all there is application potential aspects such as education and amusement, particularly owing to WBAN can work around the human body or in body surface even the body; It can be not influencing under people's normal life situation the domestic medicine monitoring hommization more that becomes, and is also more convenient.
The energy content of battery of sensor node is limited in the wireless body area network, therefore how efficiently to utilize the operating time of energy with the prolongation sensor node, and then makes the life span of whole network improve, and becomes the primary goal in the wireless body area network design.Many in recent years scholars have done a lot of work at the energy efficient of wireless body area network aspect utilizing, and have prolonged the life span of network to a certain extent.
G.Fang and E.Dutkiewicz; BodyMAC:Energy efficient TDMA-based MAC protocol for wireless body area networks; In Proc.of 20099th International Symposium on Communications and Information Technologies (ISCIT 2009); Incheon, South Korea, pp.1455-1459 proposes a kind of media access control MAC protocol based on time division multiple access TDMA.Concrete grammar is: it is periodic TDMA superframe with channel distribution, and each TDMA superframe is divided into descending sub frame and sub-frame of uplink two parts again.Descending sub frame is used for the service interaction of focal point to terminal node, and sub-frame of uplink is used for terminal node and sends data to the focal point.In order to let node be in the utilance of resting state and raising channel as much as possible, sub-frame of uplink further is divided into competition phase CAP and non-competing phase CFP again.Wherein, CAP only is used to transmit little MAC and divides into groups, and CFP then works according to traditional TDM A form.This method simply and has effectively been saved the energy of sensor node, but considers human body transmission environment and network characteristic that WBAN is special, and still there is the deficiency of following two aspects in this method:
1, this method has been ignored the professional diversity of WBAN, and for example, multiple business such as electroencephalogram (EEG) EEG, electrocardiogram ECG and body temperature, blood pressure is also deposited.Different business has different service arrival rate and data rate requirement in practical application.The difference of professional arrival rate and data rate will inevitably cause different nodes that the depletion rate of energy is produced huge difference; If these different application are not added differentiation; All in the CFP of TDMA superframe, distribute identical tdma slot; Will inevitably cause the high node energy premature depletion of professional arrival rate and data rate, and the time slot most of the time of the few node of traffic carrying capacity be in idle condition, finally cause the reduction of inhomogeneous and whole network survivability phase of the energy expenditure rate of node in the network.Therefore should consider based on the energy consumption of each node in the design of protocol of wireless body area network.Particularly media access control MAC protocol design, for prolonging each node life span as much as possible, the energy consumption of tackling different nodes is given difference and is treated.
2, the wireless device among the WBAN is applied to around the human body; And the path loss around the human body is than big many of the loss under the free space propagation condition; Especially when the link of communicating pair is non line of sight NLOS; Such as, transmitting terminal is positioned at the back of human body and receiving terminal is placed on people's shirtfront, even very big these the internodal direct communications of transmitting power are also not necessarily feasible.Therefore, in order between node, to set up reliable link, should consider also in the design of protocol of wireless body area network that multi-hop connects.
So A.Ehyaie; M.Hashemi and P.Khadivi; Using relay network to increase lifetime in wireless body area sensor networks, In Proc.of the 10th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks & Workshops (WoWMoM); Kos; Greece, June 2009, and pp.1-6 proposes before the WBAN netinit, to introduce extra via node and gives destination node to help terminal node to transmit packet.The number of via node is by the path loss factor of human body and the distance decision between source node and the destination node.Through the packet forward effect of via node, obvious this method life span of having improved the energy expenditure rate of sensor node effectively and then having prolonged network.But this method is not considered because of the network cost problem that extra via node brings is installed, is all had till the neighbor node in the sighting distance LOS scope but the number of suppose relay node can increase nodes all in network always.Therefore this method and be not suitable for actual node number limited wireless body area network and use.What this method mainly solved in addition is the routing issue of WBAN, does not relate to the problem how the MAC layer is realized.
The International standardization aspect, in order to quicken the progress of WBAN, in November, 2007, IEEE 802.15 working groups have formally set up the 6th task groups TG6, are devoted to the physical layer of WBAN and the standardization effort of media access control layer.This standard still is in the formulation stage at present.Prolong network lifetime and be one of most important performance index that IEEE 802.15.6 standard need realize.In the existing international standard of having announced; IEEE 802.15.4 is because agreement is simple and be widely used in the existing short range communication systems; And be near a world standard as low-power consumption low rate wireless near field communication of WBAN designing requirement, therefore can be used as the technological a kind of alternative of wireless body area network realizations.IEEE 802.15.4MAC layer can be supported Star network and two kinds of topological structures of peer-to-peer network; But; Most content all is the working specification about Star network in the IEEE802.15.4 standard; Content about in the course of work standard of peer-to-peer network is limited; For example: about the multi-hop superframe structure that uses under the peer-to-peer network; The Media Access Control management entity MLME that only mentions common focal point in the IEEE 802.15.4 standard will guarantee that the superframe outgoing superframe that sends each common focal point will accomplish in the non-active period of superframe incoming superframe that it is received, how the outgoingsuperframe that standard does not relate to each common focal point when having a plurality of common focal point in the same sublayer of peer-to-peer network simultaneously avoids the problem of colliding.In addition, owing to exceed critical field, the MAC problem of co-ordination how when not relating to network in the standard and between two kinds of different topology structures, switching.
Summary of the invention
The objective of the invention is to overcome the deficiency in the above-mentioned wireless body area network research contents; Propose to prolong in a kind of wireless body area network the media access control method of network lifetime; This method is through providing IEEE 802.15.4MAC details in different topology structure handoff procedure; Being implemented in does not increase the self adaptation adjustment of the situation of extra via node lower network topological structure ground, thereby maximizes the capacity usage ratio of each node, and then the life span that prolongs whole network.
The technical thought that realizes the object of the invention is: based on the multi-hop superframe structure of IEEE 802.15.4; When the node detection under certain normal communication state in the network when its current remaining value is lower than the energy threshold value of network regulation; Network coordination point starts the relay selection strategy through the superframe structure of revising next superframe; In the whole network, to select an appropriate nodes to serve as via node for detecting the node that the residual energy value is lower than threshold value; Realize the self adaptation adjustment of network topology structure ground, save the transmitting power of this node, and prolong the life span of whole network.Implementation step is following:
(1) relay request process:
(1a) under the normal communication state, whole nodes are measured the residual energy value of oneself in real time in the network, if certain node i is found the residual energy value E that its is measured
iBe lower than the energy threshold value E of network regulation
t, and just in time there be the frame mutual with network coordination point in this node, and then this node to network coordination point request relaying, is asked relaying otherwise this node will produce a special relay request frame to network coordination point through the reserved place in the mutual frame control domain;
(1b) network coordination point is replied acknowledgement frame to the node that sends relay request after receiving relay request, is used for confirming to receive;
(2) relay selection process:
(2a) network coordination point is broadcasted when the relay selection superframe begins and is sent beacon frame; This beacon frame comprises relay selection superframe length, relaying searching phase length, trunking decision phase length and competition phase length parameter; All node received beacon frames in the network, and with the reference record that comprises in the beacon frame in local cache;
(2b) the relay request node is sought frame with l level power level broadcasting relaying in the relaying corresponding time slot of searching phase; The transceiver that this moment, other nodes in the network were opened self is intercepted relaying and is sought frame; If certain node device type that listens to relaying searching frame is a full-function device; Then this node is called the l level neighbor node of relay request node; If node is sought the phase at relaying and do not listened to relaying and seek frame or listen to relaying that to seek the node device type of frame be to simplify function device, then this node is closed the transceiver of oneself, in the dormancy of trunking decision phase;
(2c) after the end of relaying searching phase; Relay request node and l level neighbor node get into the trunking decision phase; Network coordination point sends notification frame in first time slot broadcasting of trunking decision phase; This notification frame is used for the network coordination point full-function device node of network is sorted; The l level neighbor node of relay request node receives this notification frame and therefrom extracts own address sequence in network number, and according to the address sequence information of obtaining, each l level neighbor node sends relaying answer frame to network coordination point collisionless ground successively in the corresponding time slot of trunking decision phase;
After (2d) network coordination point is collected all relaying answer frames; Make trunking decision; And at last time slot broadcasting trunking decision frame of trunking decision phase; Relay request node and l level neighbor node receive the trunking decision frame and also write down the relaying result, if certain relay request node is found it with the failure of l level power level request relaying according to the trunking decision frame, and the power level progression l of this l value during less than this node and the direct communication of network coordination point
1, after then this relay request node is l+1 with l assignment again, change step (1) over to, if the value of the power level progression l of relay request node increases to l
1-1 o'clock, network coordination point was not yet for it successfully chooses relaying, and then this relay request node is abandoned relay request and directly communicated by letter with network coordination point;
(2e) trunking decision is after the phase; All nodes and network coordination point get into the residue active period part and non-active period part of relay selection superframe; There is the mutual node of service needed and network coordination point to accomplish the mutual of business at the residue active period part and the network coordination point of relay selection superframe; In non-active period part, all nodes and network coordination point get into resting state;
After (2f) whole relay selection superframe finished, network topology structure became multi-hop in a route single-hop of relay request node, and promptly whole network topology is by the star-like tree structure that is adjusted into;
(3) after network topology structure changes; According to IEEE 802.15.4 standard; Media access control layer uses the multi-hop superframe structure of supporting peer-to-peer network automatically; From relaying angle of rotation of joint degree; This multi-hop superframe structure comprises the superframe outgoingsuperframe that superframe incoming superframe that via node receives and via node send as common focal point, and every kind of superframe structure only is used for focal point and its, and next jumps the service interaction between child node, and the medium access control of so far whole prolongation network lifetime finishes.
The present invention has following advantage:
(1) seeks phase and trunking decision phase owing to increase relaying after network coordination point is received relay request among the present invention in last superframe at the beacon frame of next superframe with between the competition phase; Be implemented in and promptly can be the suitable via node of relay request node selection in the Home Network; Adaptively selected through via node ground; Network topology structure becomes multi-hop by single-hop, makes the life span of whole network be improved, and need not to add trunking;
(2) among the present invention because relaying is sought the use of uniting of frame, notification frame and trunking decision frame, make that the node of request relaying can obtain the relay selection result in next superframe in last superframe, realize of the quick response of network coordination point to the relaying requesting node;
(3) the present invention is owing in the relay selection process, revising the superframe structure under the IEEE 802.15.4 Star network and in the superframe adjustment process, IEEE 802.15.4 multi-hop working specification being replenished; Be implemented in the prolongation of media access control layer network lifetime; Compared to having the media access control method that prolongs network lifetime in the wireless body area network now; The present invention has considered the energy consumption otherness of different nodes in the wireless body area network; Fit the more practical application scene of wireless body area network, therefore practicality of the present invention is stronger.
Description of drawings
Fig. 1 is a proper communication superframe structure sketch map of the present invention;
Fig. 2 is a flow chart of the present invention;
Fig. 3 is the frame control domain sketch map that uses during relay request among the present invention;
Fig. 4 is the relay request frame structure sketch map that uses during relay request among the present invention;
Fig. 5 is a relay selection superframe structure sketch map among the present invention;
Fig. 6 is the beacon frame structure sketch map that uses during relay selection among the present invention;
Fig. 7 is that the relaying that uses during relay selection among the present invention is sought the frame structure sketch map;
Fig. 8 is the notification frame structural representation that uses during relay selection among the present invention;
Fig. 9 is that the relaying that uses during relay selection among the present invention is replied the frame structure sketch map;
Figure 10 is the trunking decision frame structure sketch map that uses during relay selection among the present invention;
Figure 11 is a multi-hop superframe structure sketch map among the present invention.
Embodiment
Suppose under the normal communication state that adopt the superframe structure communication based on IEEE 802.15.4 star topology between all nodes and the network coordination point, the structure of this superframe is as shown in Figure 1; And suppose that whole nodes all can be measured the residual energy value of oneself in real time in the network, if certain node i is found the residual energy value E that its is measured
iBe lower than the energy threshold value E of network regulation
t, then this node begins to claim among the present invention that to network coordination point request relaying this node is the relay request node.
With reference to Fig. 2, the present invention includes relay request, relay selection and superframe and adjust three parts, concrete steps are following:
One, relay request
Step 1: relay request node request relaying
If just in time there be the frame mutual with network coordination point in the relay request node; Then this node is asked relaying through mutual frame control domain as shown in Figure 3 to network coordination point; When the 7th reserved place of frame control domain is 1, representing that node has relay request, is 0 non-relay request.Do not have and the mutual frame of network coordination point if the relay request node is current; Then it sends a special relay request frame to network coordination point; As shown in Figure 4, this relay request frame is still asked relaying with the 7th reserved place of its frame control domain to network coordination point, and the media access control layer load is empty.
Step 2: network coordination point is replied acknowledgement frame to the node that sends relay request after receiving relay request, is used for confirming to receive.
Two, relay selection
Step 3, network coordination point sends beacon frame.
The superframe structure that relay selection process of the present invention is used is as shown in Figure 5; It is the improvement to IEEE 802.15.4 star topology superframe structure; Be that network coordination point is according to the relay request situation in the last superframe; Increase relaying at the beacon frame of next superframe with between the competition phase and seek phase and trunking decision phase two parts, being used for network coordination point is the relay request node at the whole network.Begin at the relay selection superframe; Network coordination point structure beacon frame; Its frame structure is as shown in Figure 6; This beacon frame is the improvement on the basis of beacon frame structure in IEEE 802.15.4, promptly in the media access control layer load, has increased wait relay address tabulation territory relay pending address list, is used to notify the relay request node to seek the time slot allocation information of phase at relaying; Afterwards, the network coordination this beacon frame of naming a person for a particular job sends with broadcast mode, and after all nodes received beacon frame, the superframe length, the relaying that read were wherein sought phase length, trunking decision phase length and competition phase length parameter, and are recorded in the local cache.
After network coordination point has sent beacon frame; Network coordination point and all nodes get into relaying as shown in Figure 5 and seek the phase, and each time slot in this period is that network coordination point is distributed to corresponding relay request node according to the number of contained address in the beacon frame wait relay address tabulation territory with order successively.Each relay request node is sought the Minimum Power Level l broadcasting relaying that can provide with its chip in the phase time slot at relaying and is sought frame; Its frame structure is as shown in Figure 7; It is the expansion to IEEE 802.15.4 frame structure that this relaying is sought frame; Its media access control layer load is empty, is used for the relay request node and seeks its l level neighbor node of phase time slot searching at corresponding relaying.Other nodes in the network are opened the transceiver of self and are intercepted relaying searching frame.If certain node device type that listens to relaying searching frame is a full-function device; Then this node is called the l level neighbor node of relay request node; If node is sought the phase at relaying and is not listened to relaying and seek frame or listen to relaying that to seek the node device type of frame be to simplify function device RFD; Then this node is closed the transceiver of oneself, in the dormancy of ensuing trunking decision phase.
After the relaying searching phase finished, network coordination point, relay request node and l level neighbor node got into the trunking decision phase as shown in Figure 5, and other nodes are in this section dormancy in the time.Network coordination point sends a notification frame in first time slot broadcasting of trunking decision phase; Its frame structure is as shown in Figure 8; This notification frame is the expansion to IEEE 802.15.4 frame structure; Its media access control layer load is the address list of all full-function device FFD in the network, and promptly FFDaddress list is used to notify l level neighbor node to send the time slot allocation information that relaying is replied frame in the trunking decision phase.All l level neighbor nodes receive this notification frame and therefrom extract own address sequence information in network; According to the address sequence information of obtaining; Each l level neighbor node sends relaying to network coordination point collisionless ground successively and replys frame in the corresponding time slot of trunking decision phase; Its frame structure is as shown in Figure 9; It is the expansion to IEEE 802.15.4 frame structure that this relaying is replied frame, and its media access control layer load comprises the current remaining value of l level neighbor node and the relay request node address information that it listens to, i.e. E
iWith Heard address list, be used for the l level neighbor node dump energy information that network coordination point obtains each relay request node, and make trunking decision.
Network coordination point passes through broadcasting trunking decision frame at last time slot of trunking decision phase; Its frame structure is shown in figure 10; This trunking decision frame is the expansion to IEEE 802.15.4 frame structure; Its media access control layer comprises the node address tabulation and its corresponding relay node address list information that relaying is chosen in success; Be successful relay request node address list and Corresponding relay node address list, be used to notify the result of relay request node and l level neighbor node network coordination point relay selection.Relay request node and l level neighbor node receive this trunking decision frame; If the relay request address of node is included in the relay request success node address tabulation of trunking decision frame; Then its request relaying success, otherwise mean that the relay request node fails with l level power level request relaying.The later course of work of node of relay request failure is divided into following two kinds of situation: the first, if the power level progression l when relay request failure node broadcast power level progression l that relaying seeks frame above it and the direct communication of network coordination point in step 4
1, after then this node is l+1 with l assignment again, change step 1 over to; The second, if the value of the power level progression l of relay request failure node increases to l
1-1 o'clock, network coordination point was not yet for it successfully chooses relaying, and then this relay request node is abandoned relay request and directly communicated by letter with network coordination point.
Step 7, all nodes and network coordination point are accomplished relay selection superframe rest parts.
Mutual for guaranteeing that the relay selection process does not influence in the network regular traffic of each node and network coordination point; The trunking decision after date; Though network coordination point is chosen relaying for the relay request node; But at this moment network schemer does not adjust immediately, and promptly each node is still directly communicated by letter with network coordination point, has the mutual node of service needed and network coordination point to accomplish the mutual of business at the residue active period part and the network coordination point of relay selection superframe; In non-active period part, all nodes and network coordination point get into resting state.
Step 8, the network topology structure adjustment.
After whole relay selection superframe finishes; In order to save the dump energy of relay request success node; The hub-and-spoke configuration of network topology structure during by proper communication is adjusted into tree structure; To be network topology structure prop up the route single-hop at relay request success node becomes multi-hop, and relay request success node only need use l level power level to communicate by letter with its corresponding via node and get final product no longer direct communication between the successful node of network coordination point and relay request in the later process.
Three, superframe adjustment process
The term explanation
The WBAN wireless body area network
The WPAN Wireless Personal Network
The TDMA time division multiple access
The access control of MAC medium
CAP competes the phase
The non-competing phase of CFP
The EEG electroencephalogram (EEG)
The ECG electrocardiogram
The NLOS non line of sight
The LOS sighting distance
IEEE IEEE-USA
TG6 the 6th task groups
MLME Media Access Control management entity
The superframe that outgoing superframe sends common focal point
The superframe that the common focal point of incoming superframe receives
The load of MAC Payload media access control layer
The FFD full-function device
RFD simplifies function device.
Claims (10)
1. prolong the media access control method of network lifetime in the wireless body area network, comprising:
(1) relay request process:
(1a) under the normal communication state, whole nodes are measured the residual energy value of oneself in real time in the network, if certain node i is found the residual energy value E that its is measured
iBe lower than the energy threshold value E of network regulation
t, and just in time there be the frame mutual with network coordination point in this node, and then this node to network coordination point request relaying, is asked relaying otherwise this node will produce a special relay request frame to network coordination point through the reserved place in the mutual frame control domain;
(1b) network coordination point is replied acknowledgement frame to the node that sends relay request after receiving relay request, is used for confirming to receive;
(2) relay selection process:
(2a) network coordination point is broadcasted when the relay selection superframe begins and is sent beacon frame; This beacon frame comprises relay selection superframe length, relaying searching phase length, trunking decision phase length and competition phase length parameter; All node received beacon frames in the network, and with the reference record that comprises in the beacon frame in local cache;
(2b) the relay request node is sought frame with l level power level broadcasting relaying in the relaying corresponding time slot of searching phase; The transceiver that this moment, other nodes in the network were opened self is intercepted relaying and is sought frame; If certain node device type that listens to relaying searching frame is a full-function device; Then this node is called the l level neighbor node of relay request node; If node is sought the phase at relaying and do not listened to relaying and seek frame or listen to relaying that to seek the node device type of frame be to simplify function device, then this node is closed the transceiver of oneself, in the dormancy of trunking decision phase;
(2c) after the end of relaying searching phase; Relay request node and l level neighbor node get into the trunking decision phase; Network coordination point sends notification frame in first time slot broadcasting of trunking decision phase; This notification frame is used for the network coordination point full-function device node of network is sorted; The l level neighbor node of relay request node receives this notification frame and therefrom extracts own address sequence in network number, and according to the address sequence information of obtaining, each l level neighbor node sends relaying answer frame to network coordination point collisionless ground successively in the corresponding time slot of trunking decision phase;
After (2d) network coordination point is collected all relaying answer frames; Make trunking decision; And at last time slot broadcasting trunking decision frame of trunking decision phase; Relay request node and l level neighbor node receive the trunking decision frame and also write down the relaying result, if certain relay request node is found it with the failure of l level power level request relaying according to the trunking decision frame, and the power level progression l of this l value during less than this node and the direct communication of network coordination point
1, after then this relay request node is l+1 with l assignment again, change step (1) over to, if the value of the power level progression l of relay request node increases to l
1-1 o'clock, network coordination point was not yet for it successfully chooses relaying, and then this relay request node is abandoned relay request and directly communicated by letter with network coordination point;
(2e) trunking decision is after the phase; All nodes and network coordination point get into the residue active period part and non-active period part of relay selection superframe; There is the mutual node of service needed and network coordination point to accomplish the mutual of business at the residue active period part and the network coordination point of relay selection superframe; In non-active period part, all nodes and network coordination point get into resting state;
After (2f) whole relay selection superframe finished, network topology structure became multi-hop in a route single-hop of relay request node, and promptly whole network topology is by the star-like tree structure that is adjusted into;
(3) after network topology structure changes; According to IEEE 802.15.4 standard; Media access control layer uses the multi-hop superframe structure of supporting peer-to-peer network automatically; From relaying angle of rotation of joint degree; This multi-hop superframe structure comprises the superframe outgoing superframe that superframe incoming superframe that via node receives and via node send as common focal point, and every kind of superframe structure only is used for focal point and its, and next jumps the service interaction between child node, and the medium access control of so far whole prolongation network lifetime finishes.
2. wireless body area network media access control method according to claim 1; The described relay request frame of step (1a) wherein; Be the improvement to IEEE 802.15.4 frame structure, promptly ask relaying with the 7th reserved place of frame control domain to network coordination point, the media access control layer load is empty.
3. wireless body area network media access control method according to claim 1; The described relay selection superframe of step (2a) wherein; It is improvement to IEEE 802.15.4 star topology superframe structure; Be that network coordination point is according to the relay request situation in the front proper communication superframe; Increase relaying at the beacon frame of next superframe with between the competition phase and seek phase and trunking decision phase two parts, be used for network coordination point and select suitable via node at the whole network for the relay request node, this relay selection superframe structure provides IEEE 802.15.4 media access control layer to switch to the details in the multi-hop process by single-hop.
4. wireless body area network media access control method according to claim 1; The described beacon frame of step (2a) wherein; It is improvement to IEEE 802.15.4 beacon frame; Promptly add and wait for the relay address tabulation, be used to notify the relay request node to seek the time slot allocation information of phase at relaying at the media access control layer loading section.
5. wireless body area network media access control method according to claim 1; Wherein the described relaying of step (2b) is sought the phase, is that network coordination point is distributed to the period that the relay request node is used to broadcast relaying searching frame according to resource available in the current network and the relay request situation of node in the proper communication superframe.
6. wireless body area network media access control method according to claim 1; Wherein the described relaying of step (2b) is sought frame; It is expansion to IEEE 802.15.4 frame structure; Its media access control layer load is empty, is used for the relay request node and seeks its l level neighbor node of phase time slot searching at corresponding relaying.
7. wireless body area network media access control method according to claim 1; The described notification frame of step (2c) wherein; It is expansion to IEEE 802.15.4 frame structure; Its media access control layer load is the address list of full-function device, is used to notify l level neighbor node to send the time slot allocation information that relaying is replied frame in the trunking decision phase.
8. wireless body area network media access control method according to claim 1; Wherein the described relaying of step (2c) is replied frame; It is expansion to IEEE 802.15.4 frame structure; Its media access control layer load comprises the current remaining value and the relay request node address information that it listens to of l level neighbor node, is used for the l level neighbor node dump energy information that network coordination point obtains each relay request node, and makes trunking decision.
9. wireless body area network media access control method according to claim 1; The described trunking decision frame of step (2d) wherein; It is expansion to IEEE 802.15.4 frame structure; Its media access control layer comprises the node address tabulation and its corresponding relay node address list information that relaying is chosen in success, is used to notify the result of relay request node and l level neighbor node network coordination point relay selection, if the relay request address of node is included in the relay request success node address tabulation of trunking decision frame; Then its request relaying success, otherwise relay request failure.
10. wireless body area network media access control method according to claim 1; The described multi-hop superframe structure of step (3) wherein; Be replenishing to multi-hop superframe working specification under the IEEE 802.15.4 peer-to-peer network; After the focal point superframe active period of via node finished, the beacon frame of each via node sent according to self address sequence number that they obtain in the trunking decision frame successively, and the superframe active period that sends of all via nodes finishes before will sending next beacon frame in its focal point.
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|---|---|---|---|
| CN2011101995757A CN102340838B (en) | 2011-07-18 | 2011-07-18 | Medium access control method for prolonging network lifetime in wireless body area network |
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| CN102625426A (en) * | 2012-03-06 | 2012-08-01 | 中南大学 | Double optimized topology control method of energy consumption equalization and delay in heterogeneous wireless networks |
| CN103404202A (en) * | 2012-08-08 | 2013-11-20 | 华为终端有限公司 | Method, station, access point, relay device and system for determining relay device |
| WO2013189449A2 (en) * | 2013-06-17 | 2013-12-27 | 中兴通讯股份有限公司 | Open-loop joint power control method and device for wireless body area network |
| CN103856401A (en) * | 2012-11-29 | 2014-06-11 | 中兴通讯股份有限公司 | Data transmission method and data transmission device |
| CN103945425A (en) * | 2013-01-23 | 2014-07-23 | 中国科学院声学研究所 | Topology optimization method and nodes in wireless sensor network |
| CN104185164A (en) * | 2014-09-10 | 2014-12-03 | 西安电子科技大学宁波信息技术研究院 | Routing method in vehicular ad hoc network based on content integrality and geographic crossroads |
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| WO2013189449A3 (en) * | 2013-06-17 | 2014-05-08 | 中兴通讯股份有限公司 | Open-loop joint power control method and device for wireless body area network |
| WO2013189449A2 (en) * | 2013-06-17 | 2013-12-27 | 中兴通讯股份有限公司 | Open-loop joint power control method and device for wireless body area network |
| WO2015161602A1 (en) * | 2014-04-25 | 2015-10-29 | 中兴通讯股份有限公司 | Acquisition method for data in wireless body area network and central device |
| US10575301B2 (en) | 2014-04-25 | 2020-02-25 | Zte Corporation | Acquisition method for data in wireless body area network and central device |
| CN104185164A (en) * | 2014-09-10 | 2014-12-03 | 西安电子科技大学宁波信息技术研究院 | Routing method in vehicular ad hoc network based on content integrality and geographic crossroads |
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| CN104184829B (en) * | 2014-09-10 | 2017-09-22 | 西安电子科技大学宁波信息技术研究院 | Method for routing based on content integrity and positional information in vehicle self-organizing network |
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| CN108471624A (en) * | 2018-07-02 | 2018-08-31 | 中国科学院深圳先进技术研究院 | The communication pattern switching method and device of wireless body area network |
| CN108471624B (en) * | 2018-07-02 | 2021-06-18 | 中国科学院深圳先进技术研究院 | Communication mode switching method and device of wireless body area network |
| CN111132261A (en) * | 2019-12-03 | 2020-05-08 | 华南理工大学 | Power control, relay selection and time slot allocation method based on gait cycle |
| CN111132261B (en) * | 2019-12-03 | 2022-09-20 | 华南理工大学 | Power control, relay selection and time slot allocation method based on gait cycle |
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