CN101345573A - Time slot numbering management method for carrier channel in MF-TDMA system - Google Patents
Time slot numbering management method for carrier channel in MF-TDMA system Download PDFInfo
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Abstract
The invention discloses a time slot number management method in carrier channel for MF-TDMA system comprising steps of ordering for time slot in a superframe represented by binary system adopting routine time sequence method, grouping time slot to two group (group 0 and group 1)according to last bit (0,1) , further separating group0 and group1 according to time sequence number last but one; grouping one by one according to 0 and 1 from back to front, gradually generating resource tree and dividing time slot group. The invention solves allocation problem for uniform time distribution for MF-TDMA time slot management from time slot number method, represents several time slots uniformly distributed in super frame cycle using reverse order number time slot group resource, solves contradiction of time incontinuity of periodic time slot and continuity of number, simplifies time uniform distribution allocation management complexity of time slot.
Description
Technical field
The invention belongs to the aerospace information technical field.Be specifically related to the design of the time slot management method in the carrier channel in a kind of RRM of the MF-TDMA communication satellite that is applied to the aerospace information field, particularly a kind of being fit to the time slot time of the carrying out time-division timing crack method for managing resource that evenly distributes.
Background technology
Space-based mobile communication system is a kind of based on satellite network, utilizes polytype satellite on the different tracks to realize between the mobile subscriber as the access node of network or a kind of wireless communication system of the intercommunication of mobile subscriber and fixed-line subscriber.This communication system has that information autonomous on the star is obtained, stored, processing and distribution capability, can be interconnected with the information system of land, sea, air base, the polynary, three-dimensional of realization information shared, and becomes the important component part of next generation mobile communication (4G) and national information highway.
The allocation of radio resources of wideband multimedia satellite communication system is one of key technology of system with management.The essence of explorer will solve the multiple services Radio Resource sharing problem of multi-user exactly.Multifrequency time-division access technology (MF-TDMA) is the combination of time division technique and frequency division technique, it is one of wideband multimedia satellite communication system key technology, be widely used in ATM-based, in the up link design of satellite communication system such as DVB-based and IP-based, be the focus of present satellite mobile communication technical research.It allows multi-link shared radio up-line resource.As shown in fig. 1, up link is made of a plurality of carrier channels (0～50), and each carrier channel is subdivided into several slots again in a superframe (as counter0 or counter1).This design can guarantee the flexibility that multi-user, multi-service insert, and improves the satellite system utilization ratio of wireless resources.In the service access stage, need in the channel architecture of complexity, distribute time interval resource at the QoS request of each connection, effective management of time interval resource is faced with great challenge, and the efficient distributing slot resources algorithm of user oriented QoS always is the difficult point of MF-TDMA technology.
If the carrier wave/time interval resource among the MF-TDMA is taken the matrix that table is regarded a two dimension as, wherein row are represented the carrier wave of different frequency, the time slot that line display was divided by the time, as shown in Figure 1.At present, for the MF-TDMA in the wideband multimedia satellite communication system, the constraints in the distributing slot resources problem mainly contains following 4: the request that (1) explorer response terminal is initiated is that a resource that connects distribution will be limited in the carrier wave.(2) explorer is the distributed time slot resource of same terminal, in time can not be overlapping.(3) generation for avoiding conflict, same time interval resource can not be distributed to two connections simultaneously.(4) be the time slot capacity that the time slot sum of a terminal distribution can not surpass a carrier wave.Because the existence of above-mentioned restriction is so all connection resources of same terminal often all are assigned in the carrier wave.So the time slot allocation process can be decomposed into two steps: carrier wave is selected and the interior time slot allocation problem of carrier wave.The first step is to determine to be terminal use's Resources allocation in which carrier channel, and second step was how to determine in this channel that the available time slot resource allocation is to terminal.
Can being described as of MF-TDMA distributing slot resources problem: under certain constraints,, how seek the problem of optimum time slot position in the idle time slot from above-mentioned time slot matrix at the demand of certain business to number of time slot.In the MF-TDMA system, explorer is that unit comes managing radio resources according to time slot, and will Radio Resource efficiently be managed, and at first will unify numbering to time slot in system.Efficiently, clear and definite unified time-gap number, be the prerequisite that improves explorer (RRM) and ground based terminal interactive efficiency on the star.
Important component part as next generation mobile communication (4G) and national information highway, space-based mobile communication system needs the transmission of multimedia integration business such as support voice, video, data, wherein video, voice, these professional Business Streams that produce have the characteristics of oneself, business is strict to time jitter, that is to say that explorer is to connect the resource of distributing will go up even as far as possible the distribution time.With the speech business is example, and it produces data according to the sampling and the code rate of voice, in order to guarantee speech quality, will guarantee professional real-time and continuity.If distribute time continuous slot resource for the user according to bursty data (BTP-burst time plan) pattern, shown in Fig. 2 a, Tsf represents the time span of a superframe, Tsf-1, Tsf-2, Tsf-3 is three continuous superframes, a connection A sends the bandwidth application, supposes according to bandwidth demand, and every superframe need connect to this and distribute 5 time slots, according to the BTP slot allocation method, if the dash area time slot so among allocation result Fig. 2 a (P1～P15).Among the Tsf-1, the time interval resource of distributing to this connection is P1 to P5, time interval resource concentrates in the short time t1, and the information that the user produces in the remaining time t2 can not in time be transmitted, and need wait until that the P6～P10 among the next superframe Tsf-2 could obtain to transmit the chance of data once more.In the whole time period, the continuity of communication is affected, and is especially serious to video traffic and speech business influence.So, at the demanding business of delay variations such as voice and video the time, need go up equally distributed time interval resource to the data source distribution time.Be that time slot should evenly distribute in the time at a superframe, shown in Fig. 2 b, and the time slot of dash area among the figure (P1～P15) be assigned to connection, they evenly distribute on time shaft, with the equally distributed method of salary distribution of time, can ensure the continuity and the validity of user data transmission.
Traditional time interval resource numbering way to manage adopts time slot and corresponding method for numbering serial of time, promptly is numbered in proper order according to the time order and function of time slot in superframe, and such method for numbering serial is simple, is easy to realize.But adopt the time sequencing numbering, the enforcement of evenly distributing distribution method for slot time brings very big difficulty, and its time slot assigning process is more than BTP pattern complexity.Therefore need seek a kind of new time-gap number method manages time interval resource, the realization difficulty of distribution method thereby the simplification slot time evenly distributes.
Summary of the invention
The present invention proposes the time slot numbering management method in the carrier channel in a kind of MF-TDMA system, mainly comprise the inverted order method for numbering serial and the corresponding organization management structure of time slot, and provided the conversion method of the time interval resource group of inverted order method for numbering serial in time-domain.Carrying out time slot when management, is adopting the unified method for numbering serial of inverted order numbering as time slot, and with the administrative model that adopts the inverted order resource tree of inverted order numbering formation as resource management, the time interval resource group that node is represented in the tree is as the object of time slot allocation and management.
The numbering management method step of inverted order grouping time interval resource tree is as follows:
1, adopts conventional method, give time slot in the superframe numbering that sorts, use binary representation according to the time sequencing correspondence;
2, according to position, the end bit (0,1) of each time slot, time slot is divided into two groups.With the end is 1 the Group1 that is referred to, and the end is 0 the Group0 that is referred to.0 and 1 is the numbering of these two time slot groups.
3, the penultimate of numbering according to time sequencing, further Group0 and these two groups of Group1 are separated once more, penultimate is 0 the Group00 that is classified as among the Group0, penultimate is 1 the Group01 that is classified as among the Group0, penultimate is 0 the Group10 that is classified as among the Group1, and penultimate is 1 the Group11 that returns among the Group1.00,01,10,11 is the numbering of these four time slot groups.
4, according to dividing into groups 0 and 1 by turn from back to front, can progressively generate resource tree, the timeslot number that comprises in the time slot group that each node layer in the resource tree is represented is that the last layer node comprises half of timeslot number.The numbering of a group is by its determining positions in resource tree, can obtain by the numbering along branch from top to down.
5, progressively divide the time slot group, when comprising a time slot in the time slot group, the numbering of this time slot group is exactly the inverted order numbering of this time slot.
6, convert the inverted order numbering to the time sequencing numbering.
Terminal will receive the time slot allocation result that explorer returns after initiating resource bid, this result represents according to the time interval resource group of inverted order numbering.Terminal need be carried out the time slot group of inverted order numbering and time sequencing corresponding, carries out transfer of data in corresponding time slot.The conversion method of inverted order numbering and time sequencing numbering is as follows:
(1) with the group # S of inverted order numbering and group mask M step-by-step with, the result is corresponding one by one with group mask M, and getting among the group mask M of correspondence among the result is 1 n position (n organizes in the mask 1 number), promptly gets the significance bit among the group number result, is designated as B as a result;
(2) everybody front and back of B are exchanged, obtained C as a result;
(3) C is exactly the back n position of time numbering, and some positions, completion numbering front can be filled arbitrarily, are the time slot of C as long as satisfy n position, time sequencing numbering back, and all belonging to group number is the inverted order numbering group of S.
The present invention has solved the equally distributed assignment problem of time the management of MF-TDMA time slot from time-gap number method aspect, time slot group resource representation equally distributed some time slots in super frame period with the inverted order numbering, solved periodically time slots discontinuous with the successional contradiction of numbering, simplified evenly the distribute complexity of allocation manager of slot time.
Description of drawings
Fig. 1 is the MF-TDMA channel architecture;
Fig. 2 a is a slot time continuous dispensing method schematic diagram;
Fig. 2 b is the slot time distribution method schematic diagram that evenly distributes;
Fig. 3 a is grouped into group0 and group1 for the time slot inverted order;
Fig. 3 b is grouped into group00, group01 and group10, group11 for the time slot inverted order;
Fig. 4 is the 16 time interval resources tree based on the inverted order grouping;
Fig. 5 is the conversion schematic diagram of inverted order numbering and time sequencing numbering;
Fig. 6 is the 256 time interval resources tree based on the inverted order numbering.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.
Time slot numbering management method in the carrier channel in a kind of MF-TDMA of the present invention system has following step:
1, adopts conventional method, give time slot in the superframe numbering that sorts, use binary representation, shown in Fig. 3 a according to the time sequencing correspondence;
2, according to position, the end bit (0,1) of each time-gap number, time slot is divided into two groups.With the end is 1 the Group1 that is referred to, and the end is 0 the Group0 that is referred to, and 0 and 1 is the numbering of these two time slot groups, shown in Fig. 3 a;
3, the penultimate of numbering according to time sequencing, further Group0 and these two time slot groups of Group1 are separated once more, penultimate is 0 the Group00 that is classified as among the Group0, and penultimate is 1 the Group01 that is classified as among the Group0, and penultimate is 0 the Group10 that is classified as among the Group1, penultimate is 1 the Group11 that is classified as among the Group1,00,01,10,11 is the numbering of these four time slot groups, shown in Fig. 3 b;
4, divide into groups according to 0 and 1 by turn from back to front, can progressively generate resource tree, each node layer in the resource tree is represented the timeslot number that comprises in the time slot group, and the timeslot number of each node layer all is that its last layer node comprises half of timeslot number.The numbering of a time slot group is by its determining positions in resource tree, can obtain by the numbering along branch from top to down.As shown in Figure 4,16 time slots can form one 5 layers tree structure according to progressively dividing, and Group00, Group01, Group10, Group11 are the time slot groups of the node representative in the 3rd layer, comprise 4 time slots in each time slot group;
5, progressively divide the time slot group, when comprising a time slot in the time slot group, the numbering of this time slot group is exactly the inverted order numbering of this time slot.
In fact the time-gap number that obtains from resource tree is exactly the binary system inverted order of this slot time serial number.Time slot in the resource tree in the represented time slot group of each node, its inverted order numbering is continuous, but is to be uniformly distributed in the superframe in time.Shown in Fig. 3 b, the inverted order numbering that belongs to four time slots of Group00 together is respectively 0000,0001,0010,0011, and they are evenly distributed on the time shaft.When carrying out the time slot management, adopt the object of the time interval resource group of inverted order numbering as management.
The unified method for expressing of above-mentioned time interval resource group is as follows:
Time slot group: the set that is the time slot of a node representative in the resource tree.A time slot group can be represented (being similar to the IP address) with group # and group mask, is determined the figure place of group # and group mask by the number of time slots of dividing in the superframe.If adopt the n position to represent group # and group mask, then comprise 2 in the superframe
nIndividual time slot.
Group #: the group # of a group is by its determining positions in resource tree, can obtain by the numbering along branch from top to down, and place the preceding n position of group #, and remaining position is added 0 and replenished.
The group mask: the number of 1 in the group mask has been represented the number of significant digit in the group #, promptly has several to be to obtain by the numbering of the branch in the resource tree in the group #.The number of time slots that this time slot group comprises, promptly the size of time slot group can be obtained by the complement code of group mask.
6, convert the inverted order numbering to the time sequencing numbering.
Timeslot resource management is numbered and manages time interval resource according to inverted order packet numbering method, in terminal communication, the inverted order packet numbering need be converted to the time sequencing numbering, thereby the corresponding time period is carried out data communication on the corresponding time shaft, the conversion that time slot group inverted order is numbered the time serial number can realize as follows, Figure 5 shows that example, have:
(1) with group # S (11000000) and group mask M (11100000) step-by-step with, result (11000000) is corresponding one by one with group mask M, getting among the result among the corresponding group mask M is 1 n position (n is 1 number in the group mask), n=3 in Fig. 5 example, promptly get the significance bit among the group number result, be designated as B (110) as a result;
(2) everybody front and back of B are exchanged, obtained C (011) as a result;
(3) C is exactly the back n position of time numbering, and some positions, completion numbering front can be filled (xxxxx) arbitrarily, are the time slot of C as long as satisfy n position, time sequencing numbering back, and all belonging to group number is the inverted order numbering group of S.
Embodiment
As shown in Figure 6, in the MF-TDMA system, each superframe of each carrier channel is divided into 256 time slots, and its time slot tissue and method for numbering serial are:
1. adopt conventional method to carry out time sequencing numbering b0000,0000～b1111,1111 for 256 time slots according to time sequencing;
2. according to time sequencing numbering end position bit (0,1), 256 time slots can be divided into two groups.Group0, group # are b0000,0000, and the group mask is b1000,0000; Group1, group # are b1000,0000, and the group mask is b1000,0000;
3. again according to two at the end of time sequencing numbering, continue two fens two time slot groups, be divided into Group00 (group # b0000,0000, group mask b1100,0000), Group01 (group # b0100,0000, group mask b1100,0000), Group10 (group # b1000,0000, group mask b1100,0000), Group11 (group # b1100,0000, group mask b1100,0000);
4. progressively two minutes, can obtain inverted order time interval resource tree, as Fig. 6;
5. when comprising a time slot in the time slot group, as only comprising a time slot in the F among Fig. 6 and two time slot groups of G, so at this moment the inverted order of time slot numbering is the group # of this time slot group.The inverted order of time slot F is numbered 00011111, and the inverted order of time slot G is numbered 00011110.
In the time interval resource tree of inverted order numbering, node A has represented a time slot group, and its time slot group # is b0000,0000, and group mask is b1000,0000, the number of time slots that comprises in this time slot group is for organizing the complement code of mask, i.e. b1000,0000 (128).
Node B has also been represented a time slot group, and its time slot group # is b0100,0000, and the group mask is b1100,0000, the number of time slots that comprises in this time slot group is the complement code of group mask, i.e. b0100,0000 (64).Convert the inverted order numbering to the time sequencing numbering, method is as follows:
1.B group # (b0100,0000) and B group mask (b1100,0000) with, get among its result effective 2, be 01;
With before and after 01 step-by-step to being adjusted to 10;
3. be placed on back two of time sequencing numbering, preceding 6 of the filling time serial number arbitrarily (b000000～b111111), all 2 at time sequencings numbering ends are that 10 time slot all belongs to the B group.
Time slot inverted order in the B group is numbered 0100,000～0111, and 1111, its inverted order numbering is continuous, and in the time sequence numbering, the position, end is that 10 time slots evenly distribute on time shaft.Number continuously equally distributed requirement of time in the design so meet.
Claims (2)
1, the time slot numbering management method in the carrier channel in a kind of MF-TDMA system is characterized in that, comprises the steps:
(a) adopt conventional method, give time slot in the superframe numbering that sorts, use binary representation according to the time sequencing correspondence;
(b) according to the end position bit (0,1) of each time slot, time slot being divided into two groups, is 1 the Group1 that is referred to the end, and the end is 0 the Group0 that is referred to, and 0 and 1 is the numbering of these two time slot groups;
(c) penultimate of numbering according to time sequencing, further Group0 and these two groups of Group1 are separated once more, penultimate is 0 the Group00 that is classified as among the Group0, penultimate is 1 the Group01 that is classified as among the Group0, and penultimate is 0 the Group10 that is classified as among the Group1, and penultimate is 1 the Group11 that returns among the Group1,00,01,10,11 is the numbering of these four time slot groups;
(d) according to dividing into groups 0 and 1 by turn from back to front, can progressively generate resource tree, the timeslot number that comprises in the time slot group that each node layer in the resource tree is represented, be that the last layer node comprises half of timeslot number, the numbering of a group is by its determining positions in resource tree, can obtain by the numbering along branch from top to down;
(e) progressively divide the time slot group, when comprising a time slot in the time slot group, the numbering of this time slot group is exactly the inverted order numbering of this time slot;
(f) convert the inverted order numbering to the time sequencing numbering.
2, the time slot numbering management method in the carrier channel in a kind of MF-TDMA according to claim 1 system, it is characterized in that: step (f) converts the inverted order numbering to the time sequencing numbering and carries out according to following steps:
(I) with group # S and group mask M step-by-step with, the result is corresponding one by one with group mask M, and getting among the group mask M of correspondence among the result is 1 n position, n organizes in the mask 1 number, promptly gets the significance bit among the group number result, is designated as B as a result;
(II) everybody front and back of B are exchanged, obtained C as a result;
(III) C is exactly the back n position of time numbering, fills some positions, completion numbering front arbitrarily, is the time slot of C as long as satisfy n position, time sequencing numbering back, and all belonging to group number is the inverted order numbering group of S.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117830A (en) * | 2013-01-28 | 2013-05-22 | 中国人民解放军理工大学 | Non-real-time service timeslot packaging method for multi-frequency time division multiple access system |
| CN104684088A (en) * | 2013-11-29 | 2015-06-03 | 成都国恒空间技术工程有限公司 | Method for uniformly allocating time slots of MF-TDMA (Multi-Frequency Time Division Multiple Access) system based on minimum mean square error rule |
| CN109547148A (en) * | 2019-01-18 | 2019-03-29 | 西安电子科技大学 | Based on the dynamic time slot allocating method of service flow path in TDMA ad hoc network |
| CN114885428A (en) * | 2022-07-12 | 2022-08-09 | 成都星联芯通科技有限公司 | Resource allocation method, communication method, earth master station, ground station and storage medium |
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2008
- 2008-08-22 CN CNA200810118807XA patent/CN101345573A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117830A (en) * | 2013-01-28 | 2013-05-22 | 中国人民解放军理工大学 | Non-real-time service timeslot packaging method for multi-frequency time division multiple access system |
| CN103117830B (en) * | 2013-01-28 | 2015-08-19 | 中国人民解放军理工大学 | Multi-frequency time division multiple access connecting system non-real-time service time slot method for packing |
| CN104684088A (en) * | 2013-11-29 | 2015-06-03 | 成都国恒空间技术工程有限公司 | Method for uniformly allocating time slots of MF-TDMA (Multi-Frequency Time Division Multiple Access) system based on minimum mean square error rule |
| CN104684088B (en) * | 2013-11-29 | 2017-11-24 | 成都国恒空间技术工程有限公司 | The uniform slot allocation method of MF TDMA systems based on minimum mean square error criterion |
| CN109547148A (en) * | 2019-01-18 | 2019-03-29 | 西安电子科技大学 | Based on the dynamic time slot allocating method of service flow path in TDMA ad hoc network |
| CN109547148B (en) * | 2019-01-18 | 2019-11-15 | 西安电子科技大学 | Based on the dynamic time slot allocating method of service flow path in TDMA ad hoc network |
| CN114885428A (en) * | 2022-07-12 | 2022-08-09 | 成都星联芯通科技有限公司 | Resource allocation method, communication method, earth master station, ground station and storage medium |
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