CN104411013A - GTS (Guaranteed Time Slot) allocation management method and equipment - Google Patents
GTS (Guaranteed Time Slot) allocation management method and equipment Download PDFInfo
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- CN104411013A CN104411013A CN201410648645.6A CN201410648645A CN104411013A CN 104411013 A CN104411013 A CN 104411013A CN 201410648645 A CN201410648645 A CN 201410648645A CN 104411013 A CN104411013 A CN 104411013A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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Abstract
The invention discloses a GTS (Guaranteed Time Slot) allocation management method and equipment. The method comprises the following steps: receiving a GTS request from a request node, and judging whether remaining time slots which can be applied to GTS allocation in a current super frame meet a GTS request requirement or not; and if the remaining time slots do not meet the GTS request requirement, comparing the transmission frame frequency of terminal equipment sending the GTS request with the transmission frame frequency of terminal equipment which applies GTS already, releasing GTS resources used by current terminal equipment with minimum transmission frame frequency, and allocating GTS resources to terminal equipment newly sending the GTS request. The GTS allocation management method has the beneficial effects that resource space does not need to be applied, and the allocation method is simple. The GTS resources can be allocated and managed more efficiently and reasonably by using coordinator equipment while existing problems are solved, and the throughput rate of a WPAN (Wireless Personal Area Network) is increased. Meanwhile, the GTS resource utilization ratio is increased greatly.
Description
Technical field
The invention belongs to wireless communication technique field, relate to wireless personal domain network (WPAN) technology in particular to the allocation management method of a kind of GTS (ensuring mechanism time slot) and equipment.
Background technology
WPAN has two kinds of mode of operations, one is beacon enable mode (beacon-enabled mode), another kind is non-beacon enable mode (non beacon-enabled), under non-beacon enable mode, all nodes in network access/conflict avoidance (CSMA/CA) algorithm competitive channel by the Carrier Sense Multiple of non-slot.The advantage of non-beacon enable mode is its self-organization, but the time can not be provided to ensure and quality of service guarantee.
Under beacon enable mode, network can periodically send superframe and carry out organizing communication, the real-time of communication and service quality can ensure by adopting superframe mode, distribute non-competing time slot in superframes carry out communications and be met, compared with non-beacon enable mode, beacon enable mode ensure that real-time transmission quality and service quality better.
In relevant standard, define superframe structure, as shown in Figure 1, the transmission interval of two contact beacon frames adopts beacon frame interval (BI) to represent.Superframe is made up of beacon, maintaining period, and wherein, active period comprises beacon frame information period, contention access period (CAP) and non-competing access-hours (CFP); And in the inactive phase, node does not send data, enter resting state and save energy.
The active period of superframe, also referred to as super-frame durations (SD), is divided into 16 isometric time slots, as in Fig. 1,0 to 15 represents.The length of each time slot, and the parameter such as the timeslot number comprised in CAP, pre-set, and beacon frame information period when being started by superframe is broadcast to all nodes in network by network.
In a superframe, can only distribute at most 7 GTS, each GTS is made up of several time slots.At present, the management of superframe is comprised and distributes GTS, cancel distributed GTS, again the position of GTS distributed is adjusted etc.
In order to request dispatching GTS, node can send GTS application to network side, and this GTS carries GTS characteristic information as information such as the length of the GTS of application and directions in applying for.Be referred to as, network side distribution GTS follows first come first served basis and distributes.For the GTS distributed, can cancel it, readjust the management of GTS position lamp, as shown in Figure 2,3, 4, the wherein all not shown inactive phase in figure.As shown in Figure 2, suppose that three GTS distributed are respectively GTS1, GTS2 and GTS3, wherein GTS1 takies time slot 13,14,15, GTS2 and takies time slot 9,10,11,12, GTS3 and take time slot 7,8, if GTS2 is cancelled, in superframes by appearance one piece not by the time slot used, as shown in Fig. 3 dash area, visible, superframe becomes scrappy, can cause the wasting of resources like this.For addressing this problem, needing the position readjusting GTS, GTS3 being moved right with near GTS1, ensureing the continuity of GTS.
Because GTS resource is very valuable, how effectively to distribute and to manage the research that GTS resource becomes important, current GTS distribution technique solution is in order to improve GTS resource utilization, do not stint and take waste network side telegon resource space, by time loss at algorithm complex, and cause the high power consumption of equipment, the utilance of GTS resource is improved by the systematic function reducing coordinator unit; And subscriber terminal equipment only just can apply for GTS Resourse Distribute when needs transferring large number of data, to ensure effective transmission of data.So existing scheme in actual applications and unrealizedly effectively, liberally distribute GTS resource.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the object of the invention is to propose one based on time-sensitive transmission, optimize the GTS allocation management method of bandwidth availability ratio simultaneously.This allocation management method is selected in the scheduling of the frequency repeating the transmission frame meeting each node, and by improving GTS utilization rate to redistributing of GTS, thus reach raising bandwidth availability ratio, ensure the object of the low power capabilities of telegon simultaneously.
Object of the present invention will be achieved by the following technical programs:
A kind of GTS allocation management method, comprises the steps:
The GTS received from requesting node asks, and whether the remaining time slots judging to can be used in current super frame GTS distribution meets GTS is asked requirement;
If do not meet, then compare the transmission frame frequency of the terminal equipment sending GTS request and the terminal equipment having applied for GTS, if have the transmission frame frequency of the terminal equipment applying for GTS to be less than newly to send the transmission frame frequency of the terminal equipment of GTS request, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request.
Preferably, describedly judge to can be used in current super frame remaining time slots that GTS distributes and whether meet the step that GTS request requires and be, whether the summation of number judging to can be used in current super frame number that GTS distributes and send the GTS that terminal equipment that GTS asks is asked is less than or equal to the maximum of the GTS number that network coordinator can distribute.
Preferably, after whether the described remaining time slots judging to can be used in current super frame GTS distribution meets the step of GTS request requirement, if meet, network coordinator is that requesting node distributes GTS according to existing GTS method of salary distribution first come first served basis.
Preferably, described compare the terminal equipment that sends GTS request with to have applied for GTS terminal equipment transmission frame frequency step before, also comprise and calculate all steps of having applied for the transmission frame frequency of the terminal equipment of GTS.
Preferably, described compare the terminal equipment that sends GTS request with to have applied for GTS terminal equipment transmission frame frequency step after, if when having the transmission frame frequency of the terminal equipment applying for GTS to be all greater than newly to send the transmission frame frequency of the terminal equipment of GTS request, then ignore the described GTS request newly sending the terminal equipment of GTS request.
Preferably, after the GTS resource that the minimum terminal equipment of described release current transmission frame rate uses, the remaining time slots that GTS distributes if now can be used in also does not meet GTS request when requiring, then continue the transmission frame frequency of the more remaining terminal equipment having applied for GTS and the terminal equipment newly sending GTS request, if also have the remaining transmission frame frequency that the transmission frame frequency of the terminal equipment of GTS is less than the terminal equipment newly sending GTS request of having applied for, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request, until meet the application of GTS resource, when having applied for that if remaining the transmission frame frequency of the terminal equipment of GTS is all greater than the transmission frame frequency of the terminal equipment newly sending GTS request, then ignore the described GTS request newly sending the terminal equipment of GTS request.
Preferably, describedly applied for that the transmission frame frequency computation part formula of the terminal equipment of GTS is: V
k=FrmNum
(i, k)/ (t
k-t
i), wherein t
irepresent and become distribution of work GTS to terminal equipment, t at i moment network coordinator
krepresent current time, FrmNum
(i, k)represent the sum of terminal equipment from moment i to k transmission frame, V
krepresent transmission rate.
Present invention further teaches a kind of GTS allocation manager equipment, this equipment comprises:
Judging unit, asks for the GTS received from requesting node, and whether the remaining time slots judging to can be used in current super frame GTS distribution meets GTS is asked requirement;
Comparing unit, for in the judged result of described judging unit be can be used in current super frame GTS distribute remaining time slots can not meet GTS request require, the transmission frame frequency of the terminal equipment relatively sending GTS request and the terminal equipment having applied for GTS, if have the transmission frame frequency of the terminal equipment applying for GTS to be less than newly to send the transmission frame frequency of the terminal equipment of GTS request, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request.
Beneficial effect of the present invention is: GTS allocation management method of the present invention does not need to apply for resource space, and distribution method is simple.While solution existing issue, enable coordinator unit allocation manager GTS resource more effectively and rationally, improve the throughput of WPAN network, largely improve GTS resource utilization simultaneously.
Below just accompanying drawing in conjunction with the embodiments, is described in further detail the specific embodiment of the present invention, is easier to understand, grasp to make technical solution of the present invention.
Accompanying drawing explanation
Fig. 1 is existing superframe structure schematic diagram;
Fig. 2 is that existing GTS manages schematic diagram one;
Fig. 3 is that existing GTS manages schematic diagram two;
Fig. 4 is that existing GTS manages schematic diagram three;
Fig. 5 is the overview flow chart of the inventive method;
Fig. 6 is the flow chart that the present invention distributes the preferred embodiment of GTS;
Fig. 7 is present device example structure schematic diagram.
Embodiment
The thought that realizes of the embodiment of the present invention is: the GTS received from requesting node asks, and whether the remaining time slots judging to can be used in current super frame GTS distribution meets GTS is asked requirement; If do not meet, then compare the transmission frame frequency of the terminal equipment sending GTS request and the terminal equipment having applied for GTS, if have the transmission frame frequency of the terminal equipment applying for GTS to be less than newly to send the transmission frame frequency of the terminal equipment of GTS request, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request.In the embodiment of the present invention, the executor of above-mentioned steps is network coordinator.
For making object of the present invention, technical scheme and advantage clearly understand, to develop simultaneously embodiment referring to accompanying drawing, the present invention is described in detail further.
Fig. 5 is the overview flow chart of the inventive method preferred embodiment, comprises the steps:
Step 201, the GTS that network coordinator receives from requesting node asks, and whether the remaining time slots judging to can be used in current super frame GTS distribution meets GTS is asked requirement; If meet, then perform step 202; Otherwise, perform step 203.
Step 202 is that requesting node distributes GTS according to existing GTS method of salary distribution first come first served basis.
Step 203, the transmission frame frequency of the terminal equipment relatively sending GTS request and the terminal equipment having applied for GTS, discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request.
Fig. 6 is the flow chart of the inventive method preferred embodiment, comprises the steps:
Step 301, the GTS that network coordinator receives from the requesting node of subscriber terminal equipment asks.In general, the frequency of the terminal equipment node statistics transmission frame in PAN network, if overfrequency threshold value, then initiates the request of GTS application.
Step 302, whether the remaining time slots judging to can be used in current super frame GTS distribution meets GTS is asked requirement.Describedly judge to can be used in current super frame remaining time slots that GTS distributes and whether meet the step that GTS request requires and be, whether the summation of number judging to can be used in current super frame number that GTS distributes and send the GTS that terminal equipment that GTS asks is asked is less than or equal to the maximum of the GTS number that network coordinator can distribute.If meet, then perform step 303; Otherwise, perform step 304.
Step 303, network coordinator is that requesting node distributes GTS according to existing GTS method of salary distribution first come first served basis.
Step 304, network coordinator calculates all steps of having applied for the transmission frame frequency of the terminal equipment of GTS.Describedly apply for that the transmission frame frequency computation part formula of the terminal equipment of GTS is: V
k=FrmNum
(i, k)/ (t
k-t
i), wherein t
irepresent and become distribution of work GTS to terminal equipment, t at i moment network coordinator
krepresent current time, FrmNum
(i, k)represent the sum of terminal equipment from moment i to k transmission frame, V
krepresent transmission rate.
Step 305, compares the transmission frame frequency of the terminal equipment sending GTS request and the terminal equipment having applied for GTS, discharges the GTS resource that the minimum terminal equipment of current transmission frame rate uses; Distribute GTS resource, i.e. step 309 then to the terminal equipment newly sending GTS request.
Wherein, some special cases are had.Such as described compare the terminal equipment that sends GTS request with to have applied for GTS terminal equipment transmission frame frequency step after, if when having the transmission frame frequency of the terminal equipment applying for GTS to be all greater than newly to send the transmission frame frequency of the terminal equipment of GTS request, then ignore the described GTS request newly sending the terminal equipment of GTS request, i.e. step 306.
If or after the GTS resource that uses of the minimum terminal equipment of described release current transmission frame rate, the remaining time slots that now can be used in GTS distribution does not also meet when GTS request requires (such as applies for the GTS of 3 time slots, and can only distribute now the GTS of 2 time slots), namely after step 308, then continue the transmission frame frequency of the more remaining terminal equipment having applied for GTS and the terminal equipment newly sending GTS request, if also have the remaining transmission frame frequency that the transmission frame frequency of the terminal equipment of GTS is less than the terminal equipment newly sending GTS request of having applied for, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request, namely step 309 is performed, until meet the application of GTS resource, when having applied for that if remaining the transmission frame frequency of the terminal equipment of GTS is all greater than the transmission frame frequency of the terminal equipment newly sending GTS request, then ignore the described GTS request newly sending the terminal equipment of GTS request, i.e. step 306.
As shown in Figure 7, present invention further teaches a kind of GTS allocation manager equipment, this equipment comprises:
Judging unit, asks for the GTS received from requesting node, and whether the remaining time slots judging to can be used in current super frame GTS distribution meets GTS is asked requirement;
Comparing unit, for in the judged result of described judging unit be can be used in current super frame GTS distribute remaining time slots can not meet GTS request require, the transmission frame frequency of the terminal equipment relatively sending GTS request and the terminal equipment having applied for GTS, if have the transmission frame frequency of the terminal equipment applying for GTS to be less than newly to send the transmission frame frequency of the terminal equipment of GTS request, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request.
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this; can not limit the scope of the invention with this; those skilled in the art are under the enlightenment of the technology of the present invention marrow; also may make other to change; all employing equivalents or equivalent transformation and all technical schemes formed, all drop within protection scope of the present invention.
Claims (8)
1. a GTS allocation management method, is characterized in that: comprise the steps,
The GTS received from requesting node asks, and whether the remaining time slots judging to can be used in current super frame GTS distribution meets GTS is asked requirement;
If do not meet, then compare the transmission frame frequency of the terminal equipment sending GTS request and the terminal equipment having applied for GTS, if have the transmission frame frequency of the terminal equipment applying for GTS to be less than newly to send the transmission frame frequency of the terminal equipment of GTS request, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request.
2. a kind of GTS allocation management method according to claim 1, it is characterized in that: describedly judge to can be used in current super frame remaining time slots that GTS distributes and whether meet the step that GTS request requires and be, whether the summation of number judging to can be used in current super frame number that GTS distributes and send the GTS that terminal equipment that GTS asks is asked is less than or equal to the maximum of the GTS number that network coordinator can distribute.
3. a kind of GTS allocation management method according to claim 1, it is characterized in that: after whether the described remaining time slots judging to can be used in current super frame GTS distribution meets the step of GTS request requirement, if meet, network coordinator is that requesting node distributes GTS according to existing GTS method of salary distribution first come first served basis.
4. a kind of GTS allocation management method according to claim 1, it is characterized in that: described compare the terminal equipment that sends GTS request with to have applied for GTS terminal equipment transmission frame frequency step before, also comprise and calculate all steps of having applied for the transmission frame frequency of the terminal equipment of GTS.
5. a kind of GTS allocation management method according to claim 1, it is characterized in that: described compare the terminal equipment that sends GTS request with to have applied for GTS terminal equipment transmission frame frequency step after, if when having the transmission frame frequency of the terminal equipment applying for GTS to be all greater than newly to send the transmission frame frequency of the terminal equipment of GTS request, then ignore the described GTS request newly sending the terminal equipment of GTS request.
6. a kind of GTS allocation management method according to claim 1, it is characterized in that: after the GTS resource that the minimum terminal equipment of described release current transmission frame rate uses, the remaining time slots that GTS distributes if now can be used in also does not meet GTS request when requiring, then continue the transmission frame frequency of the more remaining terminal equipment having applied for GTS and the terminal equipment newly sending GTS request, if also have the remaining transmission frame frequency that the transmission frame frequency of the terminal equipment of GTS is less than the terminal equipment newly sending GTS request of having applied for, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request, until meet the application of GTS resource, when having applied for that if remaining the transmission frame frequency of the terminal equipment of GTS is all greater than the transmission frame frequency of the terminal equipment newly sending GTS request, then ignore the described GTS request newly sending the terminal equipment of GTS request.
7. a kind of GTS allocation management method according to claim 1, is characterized in that: applied for that the transmission frame frequency computation part formula of the terminal equipment of GTS is: V
k=FrmNum
(i, k)/ (t
k-t
i), wherein t
irepresent and become distribution of work GTS to terminal equipment, t at i moment network coordinator
krepresent current time, FrmNum
(i, k)represent the sum of terminal equipment from moment i to k transmission frame, V
krepresent transmission rate.
8. a GTS allocation manager equipment, is characterized in that: this equipment comprises,
Judging unit, asks for the GTS received from requesting node, and whether the remaining time slots judging to can be used in current super frame GTS distribution meets GTS is asked requirement;
Comparing unit, for in the judged result of described judging unit be can be used in current super frame GTS distribute remaining time slots can not meet GTS request require, the transmission frame frequency of the terminal equipment relatively sending GTS request and the terminal equipment having applied for GTS, if have the transmission frame frequency of the terminal equipment applying for GTS to be less than newly to send the transmission frame frequency of the terminal equipment of GTS request, then discharge the GTS resource that the minimum terminal equipment of current transmission frame rate uses, distribute GTS resource then to the terminal equipment newly sending GTS request.
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| CN201410648645.6A CN104411013A (en) | 2014-11-14 | 2014-11-14 | GTS (Guaranteed Time Slot) allocation management method and equipment |
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Application publication date: 20150311 |