CN104780615B - A kind of disturbance coordination method - Google Patents
A kind of disturbance coordination method Download PDFInfo
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- CN104780615B CN104780615B CN201410015368.5A CN201410015368A CN104780615B CN 104780615 B CN104780615 B CN 104780615B CN 201410015368 A CN201410015368 A CN 201410015368A CN 104780615 B CN104780615 B CN 104780615B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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Abstract
This application discloses a kind of disturbance coordination methods, in the case that the Centroid of body area network detects that a body area network interferes it, obtain the interference coordination ability of the Centroid of the body area network interfered, pass through the necessary interference coordination configuration information of interaction between latter two right Centroid, realize that activationary time and beacon frame are orthogonal, to avoid interfering with each other between other side.Interference coordination when can not be fully staggered using the activation superframe of the invention that can effectively solve the problems, such as adjacent body area network.
Description
Technical field
The present invention relates to wireless body area network technologies, more particularly to a kind of disturbance coordination method of wireless body area network.
Background technology
With the aggravation of Urbanization in China and aging of population, disease of old people and chronic disease are more and more common, in addition to giving
Patient and society bring outside heavy financial burden, have also seriously affected the quality of the life and happy family life of patient.Wireless body area
Net（Wireless Body Area Network, WBAN）Appearance, the house health monitoring for disease of old people and chronic disease provides
A kind of simple, low cost short haul connection means.Based on WBAN technologies, by corresponding in body surface or internal arrangement
Awareness apparatus automatic collection human body electrocardio, brain electricity, myoelectricity, body temperature, blood pressure, blood glucose, the vital sign parameters such as blood oxygen, support real
When, conveniently, round-the-clock human body vital sign monitoring.WBAN technologies, which have become, to be promoted medical diagnosis efficiency, improves medical treatment clothes
Business quality carries out novel remote medical treatment, house health supervision important technical.
In face of the important function and huge market demand of wireless body area network technology, there is an urgent need to open for wireless body area network technology
Standardization effort is opened up, realizes human body physical sign health and fitness information standardized management, pushes the large-scale application of body area network technology.As
" human body " Sensor Network, WBAN have become one strategic cooperation scientific research direction of international health care circle and communication industry.
IEEE802.15 set up TG6 groups in 2007, carried out the Standardization Research of WBAN, and issued in the world in 2012 3
First WBAN standards --- IEEE802.15.6 becomes unique wireless body area network international standard issued at present.
IEEE802.15.6 standards define the physics of wireless body area network transmission（PHY）Layer and Media access contorl（MAC）Layer protocol, base
Originally the requirement of wireless body area network is met.At home, China Communications Standards Association（CCSA）Also pass through in November, 2012
Research project verification " the wireless body area network communication technology requirement for being suitable for medical treatment & health application ", target are to formulate to be suitable for China's medical treatment
Health application frequency range, the wireless body area network standard of application demand.From the point of view of research both domestic and external, WBAN also has prodigious grind at present
Study carefully space and value, the research of functionization and the industrialization of the following WBAN standards also has masses of work to do.
One typical wireless body area network network topology structure is as shown in Figure 1.Each wireless body area network has star-like net
Network topological structure, wherein having and only there are one Centroid, being responsible for the access of multiple terminal nodes, coordinate radio resource
Distribution carries out interference coordination with adjacent body area network；The number of terminal node can be 0 to 256；Centroid and terminal node
Between with 1 jump（1-Hop）Link directly carries out data transmission.
Centroid sends beacon in superframe（Beacon）Frame, the superframe are known as activating superframe.Comprising super in Beacon
The time span of frame, time slot（Slot）Time span, the time span of contention access, the time span of non-competing access, eventually
End node carries out time synchronization using Beacon frames.When two domain of individuals nets distances are very close, and be operated in same channel when
It waits, the transmission between two domain of individuals nets, which can exist, to be interfered with each other.In order to solve the interference problem between adjacent body area network,
IEEE802.15.6 standards define activation superframe interleaving mechanism, i.e., be on the activationary time of adjacent body area network it is interleaved, such as
Shown in Fig. 2.
In practical applications, due to resource-constrained, it is super that complete activation may be cannot achieve between two adjacent body area networks
Frame interlocks.IEEE802.15.6 protocol definitions beacon offset mechanism thus in time sends two adjacent body area networks
Beacon frame it is interleaved, to evade the interference between adjacent body area network beacon.The delivery time of Beacon frames can be located at every
A beacon period（Beacon Period, BP）Starting, can also be located at relative starting position certain offset moment.When
When Beacon is deviated, offset is the integral multiple of BP/4, the offset of beacon sending time（Beacon Transmission
Time Offset,BTTO）Value be：BTTO=PNm(n) × BP/4, wherein PNm(n) it is beacon offset sequence, such as 1 institute of table
Show.
Table 1
As shown in figure 3, Beacon is indicated with B, with PN5(n)=0,2,3,1 illustrate beacon sending time and beacon for ...
The relationship of offset sequence.In one cycle, the corresponding Beacon delivery times of the beacon offset sequence are respectively：0,BP/2,
BP/4 and 3BP/4, the delivery time of Beacon all repeats this pattern in every 4 BP.Adjacent body area network selects a difference
Beacon offset sequence, it can be ensured that will not be interfered with each other between the beacon of two domain of individuals nets.
IEEE802.15.6 agreements only give the elementary tactics of above-mentioned beacon offset, but do not provide two adjacent bodies
How to be coordinated between the Centroid of domain net, how to select suitable beacon offset sequence, to avoid between beacon
Interference.It is not yet based on above-mentioned beacon offset strategy at present and proposes corresponding disturbance coordination method.
Invention content
In view of this, the main purpose of the present invention is to provide a kind of disturbance coordination method, adjacent body can be effectively solved
Interference coordination problem when the activation superframe of domain net can not be fully staggered.
In order to achieve the above object, technical solution proposed by the present invention is：
A kind of disturbance coordination method, including：
A, when the Centroid Q1 of body area network X1 detects the interference from other body area networks X2, and the determining body area network
When the Centroid Q2 of X2 supports interference coordination function, the Centroid Q1 sends interference coordination to the Centroid Q2 and asks
Seek message；The interference coordination request message carries the superframe length information of the interference coordination parameters configuration information, request asked
With the slot length information of request；The interference coordination parameters configuration information includes：The beacon offset sequence of request, request occupy
Time resource instruction information；
B, after the Centroid 2 receives the interference coordination request message, the priority of the Centroid 1 is determined
It is whether higher than the priority of this node, if so, c is thened follow the steps, it is no to then follow the steps d；
C, the described information that the Centroid 2 will carry in the interference coordination request message, is determined to provide for institute
The interference coordination parameters configuration information for stating Centroid 1 is configured the interference coordination parameters by interference coordination response message
Information and relevant node time synchronizing information are sent to the Centroid 1；Execute step f；
D, the Centroid 2 judges whether to receive asking for the Centroid 1 according to the interference coordination request message
It asks, if so, thening follow the steps c, otherwise, executes step e；
E, the Centroid 2 refuses the interference coordination request of the Centroid 1, and according to the letter used with this node
Marking the different and corresponding occupied time resource of offset sequence, also nonoverlapping principle, determination are supplied to the Centroid 1
The interference coordination parameters are configured advisory information by interference coordination parameters proposed arrangement information by interference coordination response message
It is sent to the Centroid 1 with relevant node time synchronizing information；
F, the interference coordination parameters of this node are arranged according to the interference coordination response message in the Centroid 1, and lead to
Terminal node in Hownet network.
In conclusion disturbance coordination method proposed by the present invention, in the case where needing interference coordination, two neighboring body domain
The interference coordination ability of other side is obtained between the Centroid of net, passes through the necessary interference of interaction between latter two right Centroid
Coordinate configuration information, realizes that activationary time and beacon frame are orthogonal, to avoid interfering with each other between other side.This method can be with
Effectively solve the problems, such as the interference coordination when activation superframe of adjacent body area network can not be fully staggered.
Description of the drawings
Fig. 1 is star-like wireless body area network topological structure schematic diagram；
Fig. 2 is that activation superframe interlocks schematic diagram；
Fig. 3 is PN5(n)=0,2,3,1 ... beacon offset sequence diagram；
Fig. 4 is the flow diagram of the embodiment of the present invention one；
Fig. 5 is the form schematic diagram of interference coordination request message；
Fig. 6 is the form schematic diagram of interference coordination response message.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
Core of the invention thought is：In the case where needing interference coordination, the Centroid of two neighboring body area network it
Between obtain the interference coordination ability of other side, by the necessary interference coordination configuration information of interaction between latter two right Centroid,
Realize that activationary time and beacon frame are orthogonal, to avoid interfering with each other between other side.
Fig. 4 is the flow diagram of the embodiment of the present invention one, as shown in figure 4, the embodiment includes mainly：
Step 401 detects the interference from other body area networks X2 as the Centroid Q1 of body area network X1, and described in determining
When the Centroid Q2 of body area network X2 supports interference coordination function, the Centroid Q1 sends to the Centroid Q2 and interferes
Coordinate request message.
The interference coordination request message carries the superframe length information of the interference coordination parameters configuration information, request asked
With the slot length information of request；The interference coordination parameters configuration information includes：The beacon offset sequence of request, request occupy
Time resource instruction information.
In this step, Centroid Q1 will first determine the body area network when detecting that a body area network generates interference to it
Whether Centroid has the ability for supporting interference coordination, if it has, then by sending interference coordination request message, to trigger
Carry out the interference coordination between two body area networks.
Preferably, Centroid Q1 described in this step by from the beacon frame of the Centroid Q2 come obtain it is described in
Heart node Q2 supports the ability information of interference coordination function, and then the ability of interference coordination function can be supported to believe according to described
Breath, determines whether the Centroid Q2 supports interference coordination function.
Here, the interference coordination request message will carry the interference coordination parameters configuration information of request, the superframe of request
The slot length information of length information and request, the Centroid for receiving the request judge whether to use with this node dry
It disturbs coordination parameter configuration to clash, and then determines whether to agree to the request.
Preferably, the interference coordination request message can utilize the logical of interaction message frame load between existing Centroid
It is realized with format, specifically, can be by extending message identifier therein（Message id）Field utilizes the field instruction message class
Type is interference coordination request message or interference coordination response message.Such as indicate interference coordination request message with " 2 ", with " 3 " table
Show interference coordination response message, naturally it is also possible to retain number using other of the field, or above-mentioned using new field realization
Type of message indicates function.The message format of the specific interference coordination request message, the form type that Fig. 5 can be used are real
It is existing.
Preferably, the instruction information for the time resource that the request occupies, can specifically be originated by the activation period asked
Location information and the activation Period Length information of request are indicated.Wherein, the activation period initial position of the request is phase
For the deviant of beacon frame in current super frame.In this way, the activation Period Length that the activation period initial position starts
Time resource in range is the time resource that indicated request occupies.
It in special circumstances, will if the activation period initial position of the request exceeds the rear boundary of current super frame
Initial position of the Y1 moment as time resource described in current super frame after since the front boundary of current super frame, wherein
The Y1 is that the activation Period Length of the request subtracts the difference obtained behind the interval between beacon frame and superframe rear boundary.
If the sum of the activation period initial position of the request and the activation Period Length of the request are beyond current super
The rear boundary of frame, then time resource described in current super frame include：Since the activation period initial position of the request, reach
To after the rear boundary of current super frame, then unroll to the front boundary of current super frame, the time resource within the Y2 moment,
The Y2 is the difference of the activation Period Length and R of the request, and the R is since the activation period initial position of the request
To the time span of the rear boundary of current super frame.
After step 402, the Centroid 2 receive the interference coordination request message, the Centroid 1 is judged
Whether priority is higher than the priority of this node, if so, 403 are thened follow the steps, it is no to then follow the steps 404.
In this step, after Centroid 2 receives the interference coordination request message, need by comparing the preferential of the two
Grade height, if the priority of Centroid 1 is high, is needed to receive the request, that is, is held to determine whether to receive the request
Otherwise row step 403 needs to configure in conjunction with the interference coordination parameters of itself to determine whether to receive the request, that is, to execute step
404。
Preferably, in order to improve the reliability of the present invention, when the Centroid 2 receives the interference coordination request message
Afterwards, corresponding confirmation message is sent to the Centroid 1.
The described information that step 403, the Centroid 2 will carry in the interference coordination request message, is determined as carrying
The interference coordination parameters configuration information for supplying the Centroid 1 is joined the interference coordination by interference coordination response message
Number configuration information and relevant node time synchronizing information are sent to the Centroid 1；Execute step 406.
In this step, the request of Centroid 1 will be received, that is, agrees to that Centroid 1 is matched using requested parameter
It sets.
Specifically, the node time synchronizing information includes：Superframe length, slot length send current interference coordination sound
The time-gap number and slot offset amount at moment where answering message；The described of node time synchronizing information described in this step 403 surpasses
Frame length and the slot length are respectively the superframe length carried in the interference coordination request message and the time slot
Length.
Further, in order to reduce the possibility that two domain of individuals nets interfere with each other, Centroid 2 can be to this in this step
The interference coordination parameters that node uses are adaptively adjusted.It is specific that following methods realization may be used：
Judge the Centroid 1 ask beacon offset sequence and the time resource whether the letter used with this node
Mark offset sequence and corresponding time resource overlap, if it is, not according to the beacon offset sequence used with Centroid 1
Also nonoverlapping principle, the interference coordination parameters for redefining this Centroid configure same and corresponding occupied time resource.
Preferably, interference coordination response message described in this step may further include and be used to indicate current request and be connect
The status information received.
Step 404, the Centroid 2 judge whether to receive the centromere according to the interference coordination request message
Otherwise the request of point 1, executes step 405 if so, thening follow the steps 403.
Judge whether to receive the request of the Centroid 1 preferably, following methods may be used in this step：
If the beacon offset sequence that the Centroid 1 is asked is identical with the beacon offset sequence that this node uses, or
The time resource that the time resource and this node that the request of Centroid 1 occupies described in person occupy overlaps, it is determined that do not receive, it is no
Then, it determines and receives.
Above-mentioned judgment method, substantially judges whether the interference coordination parameters configuration of two Centroids clashes, such as
Fruit has conflict, then will produce interference, needs the request for refusing Centroid 1 in this case, that is, step 405 is executed, to realize two
Interference coordination between body area network；If do not conflicted, although the priority of Centroid 1 is low, save overhead and rise
See, can still receive the request of Centroid 1, that is, executes step 403.
Step 405, the Centroid 2 refuse the interference coordination request of the Centroid 1, and are adopted according to this node
Also nonoverlapping principle, determination are supplied to the centromere to the different and corresponding occupied time resource of beacon offset sequence
The interference coordination parameters are configured and are suggested by interference coordination response message by the interference coordination parameters proposed arrangement information of point 1
Information and relevant node time synchronizing information are sent to the Centroid 1.
In this step, different according to the beacon offset sequence used from this node and corresponding occupied time resource is not yet
The principle of overlapping determines the interference coordination parameters proposed arrangement information for being supplied to the Centroid 1, can be to avoid two body area networks
Interfere with each other, to realize the interference coordination of adjacent body area network.
Preferably, message lattice shown in fig. 6 may be used in the interference coordination response message in this step and step 403
Formula realization, in practical applications, however it is not limited to this format.
Specifically, the node time synchronizing information includes：Superframe length, slot length send current interference coordination sound
The time-gap number and slot offset amount at moment where answering message；The superframe of node time synchronizing information described in this step is long
Degree and the slot length are respectively the superframe length used in the Centroid 2 and slot length.
Preferably, interference coordination response message described in this step may further include and be used to indicate current request and be refused
Exhausted status information.
The interference coordination ginseng of this node is arranged according to the interference coordination response message in step 406, the Centroid 1
Number, and notify the terminal node in network.
Preferably, in order to improve the reliability of the present invention, when the Centroid 1 receives the interference coordination response message
Afterwards, corresponding confirmation message is sent to the Centroid 2.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in the present invention's
Within protection domain.
Claims (10)
1. a kind of disturbance coordination method, which is characterized in that including：
A, when the Centroid Q1 of body area network X1 detects the interference from other body area networks X2, and determine the body area network X2's
When Centroid Q2 supports interference coordination function, the Centroid Q1 sends interference coordination request to the Centroid Q2 and disappears
Breath；The interference coordination request message carries the superframe length information of the interference coordination parameters configuration information, request asked and asks
The slot length information asked；The interference coordination parameters configuration information includes：The beacon offset sequence of request, request occupy when
Between resource instruction information；
B, after the Centroid Q2 receives the interference coordination request message, judge that the priority of the Centroid Q1 is
It is no higher than the priority of this node, if so, c is thened follow the steps, it is no to then follow the steps d；
C, the described information that the Centroid Q2 will be carried in the interference coordination request message is determined to provide for in described
The interference coordination parameters configuration information of heart node Q1, and by interference coordination response message, the interference coordination parameters are configured
Information and relevant node time synchronizing information are sent to the Centroid Q1；Execute step f；
D, the Centroid Q2 is configured according to the interference coordination request message and the interference coordination parameters of itself, is judged in two
Whether the interference coordination parameters configuration of heart node clashes, if so, thening follow the steps e, otherwise, executes step c；
E, the Centroid Q2 refuses the interference coordination request of the Centroid Q1, and according to the beacon used with this node
Also nonoverlapping principle, determination are supplied to doing for the Centroid Q1 to the different and corresponding occupied time resource of offset sequence
Disturb coordination parameter proposed arrangement information, by interference coordination response message, by the interference coordination parameters proposed arrangement information and
Relevant node time synchronizing information is sent to the Centroid Q1；
F, the interference coordination parameters of this node are arranged according to the interference coordination response message in the Centroid Q1, and notify
Terminal node in network.
2. according to the method described in claim 1, it is characterized in that, the instruction information for the time resource that the request occupies is by asking
The activation Period Length information of the activation period start position information and request asked is indicated, wherein the activation of the request
Period initial position is the deviant relative to beacon frame in current super frame, if the activation period initial position of the request is super
Go out the rear boundary of current super frame, then using the Y1 moment after since the front boundary of current super frame as described in current super frame
The initial position of time resource, wherein the Y1 is that the activation Period Length of the request subtracts beacon frame and superframe rear portion side
The difference obtained behind interval between boundary；If segment length when activation period initial position and the activation of the request of the request
The sum of degree exceeds the rear boundary of current super frame, then time resource described in current super frame includes：From when the activation of the request
Section initial position starts, and after the rear boundary for reaching current super frame, then unrolls to the front boundary of current super frame, until the Y2 moment
Time resource in range, the Y2 are the difference of the activation Period Length and R of the request, and the R is swashing from the request
Period living initial position starts the time span to the rear boundary of current super frame.
3. according to the method described in claim 1, it is characterized in that, judging whether to receive the Centroid Q1's in step d
Request includes：
If the beacon offset sequence of the Centroid Q1 requests is identical with the beacon offset sequence that this node uses, Huo Zhesuo
It states the time resource that Centroid Q1 requests occupy and the time resource that this node occupies overlaps, it is determined that do not receive, otherwise,
It determines and receives.
4. according to the method described in claim 1, it is characterized in that, the node time synchronizing information includes：Superframe length, when
Gap length, the time-gap number and slot offset amount for sending the current interference coordination response message place moment；Described in the step c
The superframe length of node time synchronizing information and the slot length are respectively to be carried in the interference coordination request message
The superframe length and the slot length；The superframe length of node time synchronizing information described in the step e and
The slot length is respectively the superframe length used in the Centroid Q2 and slot length.
5. according to the method described in claim 1, it is characterized in that, the method further includes：
After the Centroid Q2 receives the interference coordination request message, corresponding confirmation is sent to the Centroid Q1
Message.
6. according to the method described in claim 1, it is characterized in that, the method further includes：
After the Centroid Q1 receives the interference coordination response message, corresponding confirmation is sent to the Centroid Q2
Message.
7. according to the method described in claim 1, it is characterized in that, interference coordination response message described in step c further wraps
It includes and is used to indicate the received status information of current request.
8. according to the method described in claim 1, it is characterized in that, interference coordination response message described in step e further wraps
It includes and is used to indicate the status information that current request is rejected.
9. according to the method described in claim 1, it is characterized in that, the step c further comprises：
The Centroid Q2 judge Centroid Q1 request beacon offset sequence and the time resource whether with this
The beacon offset sequence and corresponding time resource that node uses overlap, if it is, according to using with Centroid Q1
Beacon offset sequence is different and corresponding occupied time resource also nonoverlapping principle, redefines the interference of this Centroid
Coordination parameter configures.
10. according to the method described in claim 1, it is characterized in that, the method further includes：
Centroid Q1 described in step a is supported by obtaining the Centroid Q2 from the beacon frame of the Centroid Q2
The ability information of interference coordination function determines the Centroid Q2 according to the ability information for supporting interference coordination function
Whether interference coordination function is supported.
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Non-Patent Citations (1)
| Title |
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| Interference Detection and Mitigation in IEEE 802.15.4 Networks;Rahul C. Shah等;《2008 International Conference on Information Processing in Sensor Networks》;20080424;摘要及标题1-3 * |
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