CN103945492A - Access system - Google Patents
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- CN103945492A CN103945492A CN201410124390.3A CN201410124390A CN103945492A CN 103945492 A CN103945492 A CN 103945492A CN 201410124390 A CN201410124390 A CN 201410124390A CN 103945492 A CN103945492 A CN 103945492A
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Abstract
The invention discloses an access system. The access system comprises two or more access points and one or more pieces of user equipment (UE) in the covering range of each access point. The different access points and all the pieces of user equipment in the covering ranges of all the access points use the same frequency band and communicate wirelessly. Each access point is used for communicating with other access points through first links according to a radio frame and communicating with the UE in the covering range of the access point through second links; the pieces of UE in the different covering ranges of the access points are used for transmitting or receiving effective data in different time intervals through communication with the access points. Information transmission in the area limited by the environment and conditions is ensured through the access system, user needs are met, meanwhile, active time distribution is carried out on the UE in the different covering ranges of the access points in the aspect of time, data collision and disturbance on an idle port of the UE are avoided, and the access system is beneficial for improving communication link quality and efficiency.
Description
Technical field
The present invention relates to wireless access communication technology, espespecially a kind of by the connecting system with access point forms frequently.
Background technology
In recent years, the develop rapidly of radio communication has become the large pillar communications industry in one in modern communications field and communication mode, and take the backbone core that optical cable is main body and runs neck and neck.The flexibility of mobile communication aspect access and optical cable, in the combination of key circuit and core net capacity, qualitative superiority, are being constructed the blueprint of a wireless communication world.
Look forward to the future, the development of radio communication is to be unable to do without its rule that objectively should follow, and this rule depends primarily on the factor of two aspects: the one, and user's demand, the 2nd, the restriction while realizing in suffered environment and condition.Communication work person's task is exactly the restriction that improves as much as possible environment, manages elimination and simplified condition, to meet the demand of user in quantity, quality and safety.
For example, in generation natural calamity, cause the destroyed region of infrastructure, or the region that cannot lay optical cable in natural conditions restriction, traditional cellular network cannot be realized its due function again.Now, be to guarantee communication on this region, and then cannot meet user's demand.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of connecting system, can guarantee to be subject to the transmission of the information on the region of environment and condition restriction, meet user's demand.
In order to reach the object of the invention, the invention provides a kind of connecting system, at least comprise one or more user equipment (UE)s under two or more access points AP, each access point coverage;
Described diverse access point, and each subscriber equipment under each access point coverage all uses similar frequency bands to carry out radio communication; Between each access point, adopt time division multiplexing mode TDM to communicate; Between subscriber equipment under diverse access point coverage, there is not communication link; Wherein,
Access point, for according to radio frames, by communicating between the first link and other access points, by communicating between the subscriber equipment under the second link and its coverage; Described the first link comprises forward link and backward link, and described the second link comprises up link and down link; Between described the first link and the second link, by frequency division multiplexing mode FDM, divide resource;
Be positioned at the subscriber equipment under diverse access point coverage, for by with the communicating by letter of access point, in not identical time interval, carry out transmission or the reception of valid data.
Described radio frames at least comprises special part and common part; Wherein,
Special part, for carrying two access points TDM pilot tone separately and header fields, uplink access request and the protection interval of broadcast message at communication link two ends;
Common part, at least for carrying FDM pilot tone and business datum.
Described special part is one or more minimum time resource allocation units of described radio frames.
Described TDM pilot tone is for synchronous;
At described uplink access request in the time, the reiving/transmitting state within this time for diverse access point or UE, for the access point of rear networking sends access request to the access point first networking, or UE wants the access point connecting to send access request to it; Or the access point first networking receives the access request of the UE under its backward access point or its coverage;
Described protection interval is not less than transmission time and the system processing time sum of the maximum distance of eating dishes without rice or wine;
Described broadcast message transmits and is applied to the system control information of this radio frames in the duration.
Be positioned at the subscriber equipment under described diverse access point coverage, different from carrying out the transmission of valid data or enlivening the time of reception specifically for dividing with minimum time resource allocation unit; And keep to receive within all the other times or transmission state but do not do effective data transmit-receive, or in idle state.
Described access point comprises the access point of first access network, and one or more access points of rear access network;
When the access point of described rear access network is two or more, communicating by letter between the access point of described line access network and the access point of access network after each divided in time division multiplexing tdm mode, and allocation unit is minimum time resource allocation unit.
The access point of described first access network keeps receiving frame to synchronize with the access point of described rear access network;
The access point of described first access network keeps receiving frame to synchronize with each UE under its coverage;
The access point of described rear access network keeps receiving frame to synchronize with each UE under its coverage.
In UE under described each access point coverage, the mode of combining with FDM by TDM mode or FDM mode or TDM between each UE is carried out resource division.
Compared with prior art, the present invention at least comprises one or more user equipment (UE)s under two or more access points AP, each access point coverage; Described diverse access point, and each subscriber equipment under each access point coverage all uses similar frequency bands to carry out radio communication; Between each access point, adopt time-multiplexed mode to communicate; Between subscriber equipment under diverse access point coverage, there is not communication link; Wherein, access point, for according to radio frames, by communicating between the first link and other access points, by communicating between the subscriber equipment under the second link and its coverage; Described the first link comprises forward link and backward link, and described the second link comprises up link and down link; Between described the first link and the second link, by frequency division multiplexing mode, divide resource; Be positioned at the subscriber equipment under diverse access point coverage, for by with the communicating by letter of access point, in not identical time interval, carry out transmission or the reception of valid data.By connecting system of the present invention, guaranteed to be subject to the transmission of the information on the region of environment and condition restriction, meet user's demand, simultaneously, by in time the UE under diverse access point coverage being enlivened the distribution of time, avoid these UE in conflict and the interference of eating dishes without rice or wine to occur data, contributed to improve communication link quality and efficiency.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in specification, claims and accompanying drawing.
Accompanying drawing explanation
Accompanying drawing is used to provide the further understanding to technical solution of the present invention, and forms a part for specification, is used from explanation technical scheme of the present invention with the application's embodiment mono-, does not form the restriction to technical solution of the present invention.
Fig. 1 is the composition structural representation of connecting system of the present invention;
Fig. 2 is the composition schematic diagram of the first embodiment of wireless frame structure of the present invention;
Fig. 3 is the composition schematic diagram of the second embodiment of wireless frame structure of the present invention;
Fig. 4 is that radio frame transmission that three layers of wireless frame structure are example and the schematic diagram of resource distribution embodiment are take in the present invention;
Fig. 5 is that the present invention is with access point and the reiving/transmitting state schematic diagram of UE in same time slot frequently;
Fig. 6 (a) is the schematic diagram of the first embodiment of the resource multiplex mode between the different UEs under the same access point coverage of the present invention;
Fig. 6 (b) is the schematic diagram of the second embodiment of the resource multiplex mode between the different UEs under the same access point coverage of the present invention;
Fig. 6 (c) is the schematic diagram of the 3rd embodiment of the resource multiplex mode between the different UEs under the same access point coverage of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, hereinafter in connection with accompanying drawing, embodiments of the invention are elaborated.It should be noted that, in the situation that not conflicting, the embodiment in the application and the feature in embodiment be combination in any mutually.
In the step shown in the flow chart of accompanying drawing, can in the computer system such as one group of computer executable instructions, carry out.And, although there is shown logical order in flow process, in some cases, can carry out shown or described step with the order being different from herein.
Inventor finds, is being subject on the region of environment and condition restriction, if with carrying out direct wireless communication between access point frequently, just can guarantee the communication on this region, thereby again build cordless communication network.
For this reason, the invention provides a kind of connecting system, guarantee stable between access point, reliable, continue under the prerequisite of communication, guaranteed subscriber equipment can be whenever and wherever possible access network fast.As shown in Figure 1, at least comprise one or more subscriber equipmenies (UE) under two or more access points (AP), each access point coverage, in connecting system of the present invention, different access points, and each subscriber equipment under each access point coverage all uses similar frequency bands, and all adopt radio to communicate; Between each access point, adopt time-multiplexed mode to communicate; Between subscriber equipment under diverse access point coverage, there is not communication link; Wherein,
Access point, for according to wireless frame structure, by communicating between the first link and other access points, by communicating between the subscriber equipment under the second link and its coverage; Wherein, the first link comprises forward link (FL) and backward link (BL), and the second link comprises up link (UL) and down link (DL); Between the first link and the second link, by frequency division multiplexing mode (FDM), divide resource;
Be positioned at the subscriber equipment under diverse access point coverage, for by with the communicating by letter of access point, in not identical time interval, carry out transmission or the reception of valid data.That is to say, the subscriber equipment being positioned under diverse access point coverage is divided different enlivening the time (carrying out the time of transmission or the reception of valid data) with minimum time resource allocation unit; And keep to receive within all the other times or transmission state but do not do effective data transmit-receive, or in idle state.
Fixed station or mobile radio station that each access point is normally communicated by letter with a plurality of UE can be base station, relay station, node or other terms.Each access point provides communication overlay for specific geographic scope, and coverage can be called community (Cell), can be also sector or other terms, only for this effective coverage range of access point frequently together.UE spreads all over whole connecting system, can be mobile also can fixing, and it can be called as travelling carriage, user terminal, terminal, mobile device or other terms.
At a time, access point can be communicated by letter with 0, one or more UE.UE by UL or DL and under it access point communicate, between access point, by FL or BL, intercom mutually.Wherein, up link refers to the communication link from UE to access point under it, the communication link of the UE of down link referring to from access point to its coverage; Forward link refers to that the access point first networking is to the communication link between the access point of rear networking, backward link refers to that the access point of rear networking is to the communication link of the access point first networking, the access point of rear networking is called the backward access point of the access point first networking, and the access point of rear networking is by the access point access network first networking.In the example shown in Fig. 1, suppose that AP1 first networks than AP2.Networking is the core net that refers to an access a certain wireless communication system (can be also backbone network, or other terms).
Particularly, as shown in Figure 1, access point is divided into first network AP1 and rear networking AP2.Communication link between AP1 and AP2 is divided into again both direction, and the link from AP1 to AP2 is FL, and the link from AP2 to AP1 is BL.
UE can be called as community (Cell) and divide different set with the coverage of diverse access point, and as shown in Figure 1, the UE set under AP1 coverage comprises UE1 and UE2, and the UE set under AP2 coverage comprises UE3 and UE4.Fig. 1 has illustratively drawn UE1/UE2, tetra-UE of UE3/UE4, with UE1/UE2, represents the UE set in the Cell1 under AP coverage, with UE3/UE4, represents the UE set in the Cell2 under AP2 coverage.UE in same Cell is called UL to the link between the access point of this set, and this access point is called DL to the link of the UE in the Cell under its coverage.AP1 keeps receiving frame to synchronize with AP2, and AP1 keeps receiving frame to synchronize with the UE set under its coverage.AP2 keeps receiving frame to synchronize with the UE set under its coverage.
The system bandwidth of assumed wireless communication system is B, so, in connecting system provided by the invention, FL/BL, and can carry out resource division by FDM between UL/DL, and such as FL/BL occupied bandwidth B1, UL/DL occupied bandwidth B2, and B1+B2=B.FL/DL, and can carry out resource division by time division multiplexing mode (TDM) between BL/UL, allocation unit is minimum time resource allocation unit.In UE set under each access point coverage, between each UE, can pass through TDM mode, or FDM mode, or the mode that TDM combines with FDM is carried out resource division.
When the number of AP2 is greater than 1, communicating by letter and can divide in TDM mode between AP1 and each AP2, allocation unit is minimum time resource allocation unit.
Wireless frame structure in the present invention and transmission method can be used jointly with various radiotechnicss, comprise that CDMA, IFDMA, LFDMA, OFDMA, SC_FDMA(also can be called DFT-s-OFDMA), DSSS, FHSS etc., here the radiotechnics of mentioning is also non exhaustive, also comprises the radiotechnics that other are not mentioned.Clear in order to explain, below take and describe wireless frame structure of the present invention and transmission method for OFDMA as example.
Radio frames in the present invention at least comprises special part and common part; Wherein,
Special part, for carrying two access points TDM pilot tone separately and header fields, uplink access request and the protection interval of broadcast message at communication link two ends;
Common part, for carrying FDM pilot tone and business datum.
Special part is one or more minimum time resource allocation units of described radio frames.Below in conjunction with embodiment, be described in detail.
Fig. 2 is the composition schematic diagram of the first embodiment of wireless frame structure of the present invention, and Fig. 2 is the wireless frame structure of four layers, and it supports multiple radiotechnics.As shown in Figure 2, the transmission time is divided into L radio frames, L >=1, and each radio frames has certain duration, such as 10ms.Here, the lasting duration of each radio frames can make that fix, isometric, can be also according to not isometric, the flexibility and changeability of actual volume and the distance adjustment of eating dishes without rice or wine.As shown in Figure 2, each radio frames is divided into N subframe, N>1, and each subframe has certain duration, such as 1ms.Here, the lasting duration of each subframe can be fixing isometric, can be also according to actual amount of data or eat dishes without rice or wine distance not isometric, the flexibility and changeability of adjustment in real time.
It should be noted that, lasting duration in radio frames is according to actual volume and the not isometric of distance adjustment of eating dishes without rice or wine, flexibility and changeability time, specific implementation roughly comprises: each UE reports its next frame business datum amount to access point under it, the result being reported according to its data amount and UE by this access point, coordinate UE uplink communication duration and downlink communication duration in next radio frames, and the communication time between current access point and other access points, thereby adjusted in real time the communication time of the link of FL and BL, make the lasting duration of radio frames realize flexible variation according to actual conditions.
Example as shown in Figure 2, using subframe as minimal time allocation unit, Yi Qiwei unit adjusts transmitting-receiving ratio or the time resource allocation proportion of each access point and UE in real time.It should be noted that, also can be using certain combination of other unit or other unit as minimum time resource allocation unit.
Example as shown in Figure 2, can will be numbered 1 subframe as special subframe in each radio frames, all the other subframes are called common subframe.Wherein,
Special subframe; for carrying two access points TDM pilot tone separately and header fields, uplink access request and the protection interval of broadcast message at communication link two ends: the TDM pilot tone that is positioned at header fields can be used for synchronously, comprises radio frames detection, frequency deviation estimation, timing estimation etc.At uplink access request, in the time, the reiving/transmitting state within this time for diverse access point or UE, can be that the access point of rear networking sends access request to the access point first networking, or UE wants the access point connecting to send access request to it; Or the access point first networking receives the access request of the UE under its backward access point or its coverage.Protection interval is not less than transmission time and the system processing time sum of the maximum distance of eating dishes without rice or wine, and protection interval can be set as fixedly duration, also can adjust in real time according to the change of distance of eating dishes without rice or wine.The broadcast message that is positioned at header fields can transmit the system control information that is applied to this radio frames duration, comprises the parameters such as up-downgoing proportioning, user resources proportioning.
It should be noted that, other positions that special subframe also can be in radio frames, number can be also a plurality of, also can add other information in a certain particular system.
Common subframe, for carrying FDM pilot tone and business datum.FDM pilot tone and TDM pilot tone can be for channel estimating etc.
Example as shown in Figure 2, a common subframe is divided into M time slot, M>1, each time slot has certain duration, such as 0.5ms.Each time slot consists of K symbol, K>1, and as 6 OFDM symbols, symbol is chronomere minimum in frame structure, the number of symbol is relevant with the length of symbol time and time slot.The lasting duration of time slot can be fixed, and can be also that according to the business demand of real system, adjust in real time, unfixed.
Radio frames in Fig. 2, subframe, time slot, symbol also can be called as some other term.
Give an example, in a specific embodiment, suppose that a certain radio frames continues 10ms.In this radio frames, comprise N=10 subframe, each subframe continues 1ms.Each subframe is divided into M=2 time slot, each time slot duration 0.5ms.In each time slot, be divided into 6 OFDM symbols, each OFDM symbol has 2560 chips, duration 83.3us.N, M and K can be also other values.
Fig. 3 is the composition schematic diagram of the second embodiment of wireless frame structure of the present invention, and Fig. 3 is the wireless frame structure of three layers, and it supports multiple radiotechnics.As shown in Figure 3, the transmission time is divided into L radio frames, L >=1, and each radio frames has certain duration, such as 5ms.Here, the lasting duration of each radio frames can be that fix, isometric, can be also not isometric, the flexibility and changeability of adjusting according to actual transceiving data amount.As shown in Figure 3, each radio frames is divided into N time slot, N>1, and each time slot has certain duration, such as 0.5ms.
Example as shown in Figure 3, using time slot as minimum time resource allocation unit, Yi Qiwei unit adjusts transmitting-receiving time scale or user time resource allocation proportion in real time.It should be noted that, also can be using certain combination of other unit or other unit as minimum time resource allocation unit.
Example as shown in Figure 3, can will be numbered 1 time slot as special time slot in each radio frames, all the other time slots are called common time slot.Wherein,
Special time slot; for carrying two access points TDM pilot tone separately and header fields, uplink access request and the protection interval of broadcast message at communication link two ends: the TDM pilot tone that is positioned at header fields can be used for synchronously, comprises radio frames detection, frequency deviation estimation, timing estimation etc.It should be noted that, other positions that special time slot also can be in radio frames, number can be also a plurality of, can also comprise other information in a certain particular system.
Common time slot, for carrying FDM pilot tone and business datum.Example as shown in Figure 3, each common time slot consists of K symbol, K>1, as 6 OFDM symbols, symbol is chronomere minimum in frame structure, the number of symbol is relevant with the length of symbol time and common time slot.
Radio frames in Fig. 3, time slot, symbol also can be called as some other term.
Give an example, in a specific embodiment, suppose that a certain radio frames continues 8ms.This radio frames is divided into M=12 time slot, common time slot duration 0.5ms, special time slot duration 2ms.In each common time slot, be divided into 6 OFDM symbols, each OFDM symbol has 2560 chips, duration 83.3us.M and K can be also other values.
When there is a plurality of backward access point in an access point, there is many FL and BL link, between these FL and BL, with minimum time resource allocation unit, carry out the division of resource and multiplexing.
Except the wireless frame structure shown in Fig. 2 and Fig. 3, frame structure of the present invention can also be defined as to the two-layer frame structure of supporting multiple radiotechnics, such as, can define and in radio frames, comprise N subframe, or in radio frames, comprise M time slot etc.On the basis of frame structure provided by the invention, specific implementation is that those skilled in the art easily obtain according to technical scheme provided by the invention, repeats no more here.
It is example that the wireless frame structure of three layers is take in the present invention, Fig. 4 is that radio frame transmission that three layers of wireless frame structure are example and the schematic diagram of resource distribution embodiment are take in the present invention, as shown in Figure 4, one time FL/BL represents a time slot, Hdr1 in Fig. 4 represents TDM pilot tone 1 and broadcast message 1, and Acc1 represents uplink access request 1; Hdr2 represents TDM pilot tone 2 and broadcast message 2, and Acc2 represents uplink access request 2.Suppose to comprise 9 time slots in the radio frames in this Fig. 4, numbering is respectively S0 to S9.
In Fig. 4, AP1, AP2, UE1/UE2, UE3/UE4 are corresponding with Fig. 1 respectively, and Fig. 4 be take the connecting system shown in Fig. 1 as basis.Suppose the access point of AP1 for first networking, the access point that AP2 is rear networking, therefore, in the example shown in Fig. 4, is called FL by AP1 to the communication link of AP2, and AP2 is called to BL to the communication link of AP1.Between FL/BL and UL/DL, adopt FDM mode, with minimum frequency resource allocation unit, carry out the multiplexing of frequency resource, communication link between access point accounts for a part for total system bandwidth as being B1, link between access point and UE accounts for the remainder of total system bandwidth as being B2, and B1+B2=B, wherein B is system bandwidth.It should be noted that, bandwidth B 1 and bandwidth B 2 are dispatched by upper strata, and schedule information can be carried in head control word, also can be placed on other positions, do not limit here, and specific implementation belong to those skilled in the art's public office technology, repeat no more here.Between FL/DL and BL/UL, adopt TDM mode, with minimum time resource allocation unit, carry out the multiplexing of time resource, in the example shown in Fig. 4, minimum time resource allocation unit is a time slot, and a FL/BL is a time slot.
In the example shown in Fig. 4, due to definition, AP1 first networks with respect to AP2, and therefore, in special time slot, previous section is the Hdr1 shown in Fig. 4 for carrying TDM pilot tone 1 and the broadcast message 1(of AP1), and the uplink access request 2 of UE3/UE4 is Acc2; Mid portion is that protection interval GP(is as shown in the diagonal line hatches lattice in Fig. 4), for eating dishes without rice or wine transmission, data processing time delay and send out to receive change-over time; Aft section is the Hdr2 shown in Fig. 4 for carrying TDM pilot tone 2 and the broadcast message 2(of AP2), and the uplink access request 1 of UE1/UE2 is Acc1.
Like this, in the previous section of special time slot, AP1, UE3/UE4 are in emission state, AP2, UE1/UE2 be in accepting state, therefore, and at a time slot above of special time slot, require AP1, UE3/UE4 in emission state, AP2, UE1/UE2 are in accepting state.And in the aft section of special time slot, at this moment through the sending out of mid portion of radio frames, receive change-over time, AP1, UE3/UE4 are in accepting state, AP2, UE1/UE2 are in emission state, therefore, a time slot below at special time slot, requires AP1, UE3/UE4 in accepting state, and AP2, UE1/UE2 are in emission state.At all the other time slots of radio frames, the reiving/transmitting state of each access point and UE is not done to requirement, can to the transmitting-receiving ratio of these time slots in current wireless frame, be configured according to the data volume of particular system.
Fig. 5 is access point of the present invention and the reiving/transmitting state schematic diagram of UE in same time slot, and in conjunction with the example shown in Fig. 4, AP1 keeps receiving frame to synchronize with AP2, UE1/UE2, and UE3/UE4 keeps receiving frame to synchronize with AP2.That is to say, a certain access point and this access point be with keeping receiving frame to synchronize between access point frequently, UE under this access point coverage, and the UE maintenance reiving/transmitting state under the access point coverage of this access point and this access point is synchronizeed.
In Fig. 1, between UE in Cell1 and the UE in Cell2, there is not the link of direct communication, that is to say, the UE under the UE under a certain access point coverage and another access point coverage does not carry out direct communication, and the control authority of access point can not be crossed over its coverage.In conjunction with Fig. 5, in Fig. 4, for clear, suppose to choose time slot 2 and be described to the time interval of time slot 8, UE1/UE2 sends valid data at time slot 2 in the time interval of time slot 4; At time slot 5, in the time interval of time slot 8, keep emission state, but do not launch any valid data; And UE3/UE4 time slot 2 in the time interval of time slot 4 in accepting state, but do not receive any data, or the data that receive are not processed; At time slot 5, in the time interval of time slot 8, receive the downstream data flow of access point AP2.
Also can be understood as, UE under diverse access point coverage does not carry out transmission or the reception of valid data in identical time interval, UE under diverse access point coverage divides different enlivening the time with time resource allocation unit, and keep reiving/transmitting state but do not do effective data transmit-receive in other times, or in idle state (can be also other terms).
By connecting system of the present invention, guaranteed to be subject to the transmission of the information on the region of environment and condition restriction, met user's demand, simultaneously, by in time the UE under diverse access point coverage being enlivened the distribution of time, avoid these UE in conflict and the interference of eating dishes without rice or wine to occur data, contributed to improve communication link quality and efficiency.
Resource multiplex mode between different UEs under a certain access point coverage, UE that can be under this access point coverage enlivened in the time, from time and two dimensions of frequency, according to minimum time or frequency resource allocation unit, carry out the resource of different UEs and distribute.Fig. 6 (a) is the schematic diagram of the first embodiment of the resource multiplex mode between the different UEs under the same access point coverage of the present invention, as shown in Fig. 6 (a), enlivening in the time of a time slot, carry out the communication of UL or DL direction, different UE(is as UEa, UEb, UEc and UEd) according to the FDM multiplex mode of frequency partition resource.Fig. 6 (b) is the schematic diagram of the second embodiment of the resource multiplex mode between the different UEs under the same access point coverage of the present invention, as shown in Fig. 6 (b), within the time of enlivening, different UEs (as UEa, UEb, UEc and UEd) is divided the TDM multiplex mode of resource according to the time.Fig. 6 (c) is the schematic diagram of the 3rd embodiment of the resource multiplex mode between the different UEs under the same access point coverage of the present invention, and as shown in Fig. 6 (c), within the time of enlivening, different UEs is (as UEa, UEb, UEc, UEd.UEe and UEf) according to time and two dimensions of frequency, divide the multiplex mode of resource.Different resource multiplex modes can have different flexibilities, according to the wireless communication system of particular implementation, select.In above Fig. 6 (a)～Fig. 6 (c), abscissa represents the time, and ordinate represents frequency.
Although the disclosed execution mode of the present invention as above, the execution mode that described content only adopts for ease of understanding the present invention, not in order to limit the present invention.Those of skill in the art under any the present invention; do not departing under the prerequisite of the disclosed spirit and scope of the present invention; can in the form of implementing and details, carry out any modification and variation; but scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims was defined.
Claims (8)
1. a connecting system, is characterized in that, at least comprises one or more user equipment (UE)s under two or more access points AP, each access point coverage;
Described diverse access point, and each subscriber equipment under each access point coverage all uses similar frequency bands to carry out radio communication; Between each access point, adopt time division multiplexing mode TDM to communicate; Between subscriber equipment under diverse access point coverage, there is not communication link; Wherein,
Access point, for according to radio frames, by communicating between the first link and other access points, by communicating between the subscriber equipment under the second link and its coverage; Described the first link comprises forward link and backward link, and described the second link comprises up link and down link; Between described the first link and the second link, by frequency division multiplexing mode FDM, divide resource;
Be positioned at the subscriber equipment under diverse access point coverage, for by with the communicating by letter of access point, in not identical time interval, carry out transmission or the reception of valid data.
2. connecting system according to claim 1, is characterized in that, described radio frames at least comprises special part and common part; Wherein,
Special part, for carrying two access points TDM pilot tone separately and header fields, uplink access request and the protection interval of broadcast message at communication link two ends;
Common part, at least for carrying FDM pilot tone and business datum.
3. connecting system according to claim 2, is characterized in that, one or more minimum time resource allocation units that described special part is described radio frames.
4. according to the connecting system described in claim 2～3 any one, it is characterized in that, described TDM pilot tone is for synchronous;
At described uplink access request in the time, the reiving/transmitting state within this time for diverse access point or UE, for the access point of rear networking sends access request to the access point first networking, or UE wants the access point connecting to send access request to it; Or the access point first networking receives the access request of the UE under its backward access point or its coverage;
Described protection interval is not less than transmission time and the system processing time sum of the maximum distance of eating dishes without rice or wine;
Described broadcast message transmits and is applied to the system control information of this radio frames in the duration.
5. connecting system according to claim 3, is characterized in that, is positioned at the subscriber equipment under described diverse access point coverage, different from carrying out the transmission of valid data or enlivening the time of reception specifically for dividing with minimum time resource allocation unit; And keep to receive within all the other times or transmission state but do not do effective data transmit-receive, or in idle state.
6. connecting system according to claim 3, is characterized in that, described access point comprises the access point of first access network, and one or more access points of rear access network;
When the access point of described rear access network is two or more, communicating by letter between the access point of described line access network and the access point of access network after each divided in time division multiplexing tdm mode, and allocation unit is minimum time resource allocation unit.
7. connecting system according to claim 6, is characterized in that, the access point of described first access network keeps receiving frame to synchronize with the access point of described rear access network;
The access point of described first access network keeps receiving frame to synchronize with each UE under its coverage;
The access point of described rear access network keeps receiving frame to synchronize with each UE under its coverage.
8. according to by connecting system claimed in claim 7, it is characterized in that, in the UE under described each access point coverage, the mode of combining with FDM by TDM mode or FDM mode or TDM between each UE is carried out resource division.
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| CN201410124390.3A CN103945492B (en) | 2014-03-28 | 2014-03-28 | A kind of access system |
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