CN103945492B - A kind of access system - Google Patents
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Abstract
The invention discloses a kind of access system, including one or more user equipmenies under two or more access points, each access point coverage；Each UE under diverse access point, and each access point coverage using similar frequency bands and is radio communication.Access point is used for according to radio frames, by being communicated between the first link and other access points, by being communicated between the second link and the UE under its coverage；UE under diverse access point coverage, for by the communication with access point, the transmission or reception of valid data to be carried out in the time interval differed.Pass through access system of the present invention, it ensure that transmitting for the information on the region limited by environment and condition, meet the demand of user, simultaneously, by the distribution for carrying out active time to the UE under diverse access point coverage in time, UE is avoided in the conflict and interference eating dishes without rice or wine data occur, communication link quality and efficiency is favorably improved.
Description
Technical field
The present invention relates to wireless access communication technology, espespecially a kind of access system being made up of same frequency access point.
Background technology
In recent years, radio communication develop rapidly become a big pillar communications industry in modern communicationses field and
Communication mode, runs neck and neck with the backbone core based on optical cable.Flexibility and optical cable of the mobile communication in terms of access
The combination of superiority on backhaul and core net capacity, quality, is constructing 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 should objectively follow, and this rule mainly takes
Certainly in both sides factor：One is the demand of user, and two be the limitation on suffered environment and condition when realizing.Communication work person's
Task is exactly to improve environment as much as possible, try elimination and the restriction of simplified condition, to meet user in quantity, quality and safety
On demand.
For example, cause the destroyed region of infrastructure occurring natural calamity, or can not in natural conditions limitation
The region of optical cable is laid, traditional cellular network will be unable to realize its due function again.Now, it is that can not ensure this region
On information transfer, and then can not meet the demand of user.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of access system, it ensure that by environment and condition limit
The transmission of information on the region of system, meets the demand of user.
In order to reach the object of the invention, the invention provides a kind of access system, at least connect including two or more
One or more user equipment (UE)s under access point AP, each access point coverage；
Each user equipment under the diverse access point, and each access point coverage carries out nothing using similar frequency bands
Line communicates；Communicated between each access point using time division multiplexing mode TDM；Use under diverse access point coverage
Communication link is not present between the equipment of family；Wherein,
Access point, for according to radio frames, by being communicated between the first link and other access points, passing through the second chain
Communicated between user equipment under Lu Yuqi coverages；First link includes forward link and backward link, institute
Stating the second link includes up-link and downlink；Pass through frequency division multiplexing mode between first link and the second link
FDM divides resource；
User equipment under diverse access point coverage, for by the communication with access point, what is differed
The transmission or reception of valid data are carried out in time interval.
The radio frames at least include special part and normal part；Wherein,
Special part, for carrying the respective TDM pilot tones of two access points at communication link two ends and the head of broadcast message
Portion's field, uplink access request and protection interval；
Normal part, at least for carrying FDM pilot tones and business datum.
The special part is one or more minimum time resource allocation units of the radio frames.
The TDM pilot tones are used for synchronous；
Within the uplink access request time, for the reiving/transmitting state of diverse access point or UE within the time, after being
The access point of networking sends access request to the access point first networked, or UE please to its access point transmission access for wanting connection
Ask；Or the access point first networked receives its backward access point or the access request of the UE under its coverage；
The protection interval is not less than the transmission time and system processing time sum for maximum distance of eating dishes without rice or wine；
The broadcast message transmission is applied to the system control information in the wireless frame duration.
User equipment under the diverse access point coverage, specifically for minimum time resource allocation unit
Divide the different active times for being used to carry out transmission or the reception of valid data；And keep receiving or sending shape within remaining time
State but valid data transmitting-receiving is not done, or in idle state.
Described access point includes the access point of first access network, and one or more accesses of access network afterwards
Point；
The access point of the rear access network be two or more when, the access point of the line access network and each
The communication between the access point of access network is divided in time division multiplexing tdm mode afterwards, and allocation unit is minimum time resource
Allocation unit.
The access point of the first access network and the access point of the rear access network keep transmitting-receiving frame synchronization；
The access point of the first access network keeps transmitting-receiving frame synchronization with each UE under its coverage；
The access point of the rear access network keeps transmitting-receiving frame synchronization with each UE under its coverage.
In UE under each access point coverage, between each UE by TDM modes or FDM modes or
TDM carries out resource division with the united modes of FDM.
Compared with prior art, the present invention at least includes two or more access points AP, each access point coverage
Under one or more user equipment (UE)s；Each user under the diverse access point, and each access point coverage sets
It is standby to carry out radio communication using similar frequency bands；Communicated between each access point using time-multiplexed mode；Positioned at not
With between the user equipment under access point coverage be not present communication link；Wherein, access point, for according to radio frames, leading to
Cross and communicated between the first link and other access points, by entering between the user equipment under the second link and its coverage
Row communication；First link includes forward link and backward link, and second link includes up-link and downlink；
Pass through frequency division multiplexing model split resource between first link and the second link；Under diverse access point coverage
User equipment, for by the communication with access point, the transmission or reception of valid data to be carried out in the time interval differed.
Pass through access system of the present invention, it is ensured that transmitting for the information on region limited by environment and condition, meet the demand of user,
Meanwhile, pass through the distribution for carrying out active time to the UE under diverse access point coverage in time, it is to avoid these UE exist
Eat dishes without rice or wine the conflict and interference for data occur, be favorably improved communication link quality and efficiency.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by specification, rights
Specifically noted structure is realized and obtained in claim and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used for providing further understanding technical solution of the present invention, and constitutes a part for specification, with this
The embodiment of application is used to explain technical scheme together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the composition structural representation of access 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 the schematic diagram of radio frame transmission and resource distribution embodiment of the present invention by taking three layers of wireless frame structure as an example；
Fig. 5 is access point and UE reiving/transmitting state schematic diagram in same time slot of the present invention with frequency；
Fig. 6 (a) is the first real of the resource multiplex mode between the different UE under same access point coverage of the invention
Apply the schematic diagram of example；
Fig. 6 (b) is the second real of the resource multiplex mode between the different UE under same access point coverage of the invention
Apply the schematic diagram of example；
Fig. 6 (c) is the 3rd real of the resource multiplex mode between the different UE under same access point coverage of the invention
Apply the schematic diagram of example.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
Can be in the computer system of such as one group computer executable instructions the step of the flow of accompanying drawing is illustrated
Perform.And, although logical order is shown in flow charts, but in some cases, can be with suitable different from herein
Sequence performs shown or described step.
Inventor has found, on the region limited by environment and condition, if straight with that can be carried out between the access point of frequency
Radio communication is connect, it is possible to ensure the information transfer on this region, so as to build cordless communication network again.
Therefore, the present invention provides a kind of access system, on the premise of stable between ensureing access point, reliable, Continued communication,
It ensure that user equipment being capable of quick access network whenever and wherever possible.Accessed as shown in figure 1, at least including two or more
Point（AP）, one or more user equipmenies under each access point coverage（UE）, in the access system of the present invention, no
With access point, and each user equipment under each access point coverage uses similar frequency bands, and all uses radio
Communicated；Communicated between each access point using time-multiplexed mode；Under diverse access point coverage
Communication link is not present between user equipment；Wherein,
Access point, for according to wireless frame structure, by being communicated between the first link and other access points, passes through
Communicated between two links and the user equipment under its coverage；Wherein, the first link includes forward link（FL）With it is rear
To link（BL）, the second link include up-link（UL）And downlink（DL）；Pass through between first link and the second link
Frequency division multiplexing mode（FDM）Divide resource；
User equipment under diverse access point coverage, for by the communication with access point, what is differed
The transmission or reception of valid data are carried out in time interval.That is, the user under diverse access point coverage sets
It is standby that different active times are divided with minimum time resource allocation unit（Carry out the time of transmission or the reception of valid data）；
And reception or transmission state are kept within remaining time but valid data transmitting-receiving is not done, or in idle state.
Each access point is typically fixed station or movement station with multiple UE communications, can be base station, relay station, node or its
His term.Each access point provides communication overlay for specific geographic scope, and coverage is properly termed as cell（Cell）, can also
It is sector or other terms, only for the effective coverage range of this together frequency access point.UE spreads all over whole access system, Ke Yishi
Mobile can also be fixed, and it can be referred to as mobile station, user terminal, terminal, mobile device or other terms.
At a time, access point can be with 0, one or more UE communications.UE belonging to UL or DL and its by accessing
Point is communicated, and is in communication with each other between access point by FL or BL.Wherein, up-link refers to access from belonging to UE to its
Point communication link, downlink refer to from access point to its coverage under UE communication link；Forward link refers to elder generation
Communication link between the access point that the access point of networking networks after, the access point that backward link networks after referring to is to first networking
Access point communication link, the backward access point for the access point that the access point networked afterwards referred to as first networks, the access networked afterwards
Point passes through the access point access network first networked.In the example shown in Fig. 1, it is assumed that AP1 first networks than AP2.Networking refers to connect
Enter the core net of a certain wireless communication system（Can also be backbone network, or other terms）.
Specifically, as shown in figure 1, access point is divided into first networking AP1 and rear networking AP2.Communication chain between AP1 and AP2
Road is divided into both direction again, and the link from AP1 to AP2 is FL, and the link from AP2 to AP1 is BL.
UE is properly termed as such as cell with the coverage of diverse access point（Cell）To divide different set, such as Fig. 1 institutes
Show, the UE set that the UE set under AP1 coverages is included under UE1 and UE2, AP2 coverages includes UE3 and UE4.Fig. 1 is only
It is illustratively to depict tetra- UE of UE1/UE2, UE3/UE4, the UE collection in the Cell1 under AP coverages is represented with UE1/UE2
Close, the UE set in the Cell2 under AP2 coverages is represented with UE3/UE4.The access point of UE in same Cell to the set
Between link be referred to as UL, the link of the UE in Cell under the access point to its coverage is referred to as DL.AP1 and AP2 keeps receiving
Frame synchronization is sent out, AP1 keeps transmitting-receiving frame synchronization with the UE set under its coverage.AP2 is protected with the UE set under its coverage
Hold transmitting-receiving frame synchronization.
Assuming that the system bandwidth of wireless communication system is B, then, in the access system that the present invention is provided, FL/BL, with
It can carry out resource division between UL/DL by FDM, such as FL/BL occupied bandwidths B1, UL/DL occupied bandwidth B2, and B1+B2=
B.Time division multiplexing mode can be passed through between FL/DL, with BL/UL（TDM）Resource division is carried out, allocation unit provides for minimum time
Source allocation unit.In UE set under each access point coverage, TDM modes, or FDM side can be passed through between each UE
Formula, or TDM carry out resource division with the united modes of FDM.
When AP2 number is more than 1, the communication between AP1 and each AP2 can be divided in a tdm fashion, and distribution is single
Position is minimum time resource allocation unit.
Wireless frame structure and transmission method in the present invention can be used in conjunction with various radiotechnics, including CDMA,
IFDMA、LFDMA、OFDMA、SC_FDMA（It is referred to as DFT-s-OFDMA）, DSSS, FHSS etc., referred to herein as radio
Technology is not exhaustive, also including radiotechnics that other are not referred to.It is clear in order to state, below exemplified by for OFDMA
The wireless frame structure and transmission method of the present invention is described.
Radio frames in the present invention at least include special part and normal part；Wherein,
Special part, for carrying the respective TDM pilot tones of two access points at communication link two ends and the head of broadcast message
Portion's field, uplink access request and protection interval；
Normal part, for carrying FDM pilot tones and business datum.
Special part is one or more minimum time resource allocation units of the radio frames.With reference to implementation
Example is 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 one four layers of radio frames knot
Structure, it supports a variety of radiotechnics.As shown in Fig. 2 transmission time is divided into L radio frames, L >=1, each radio frames tool
There are certain duration, such as 10ms.Here, the duration of each radio frames can make fixation, it is isometric, can also
It is Length discrepancy, the flexibility and changeability according to actual volume and distance adjustment of eating dishes without rice or wine.As shown in Fig. 2 each radio frames are drawn
It is divided into N number of subframe, N>1, each subframe has certain duration, such as 1ms.Here, the duration of each subframe can be with
It is Length discrepancy, flexibility and changeability that be fixed isometric or being adjusted in real time according to actual amount of data or distance of eating dishes without rice or wine.
It should be noted that being according to actual volume and eating dishes without rice or wine apart from the Length discrepancy of adjustment in the duration of radio frames
, flexibility and changeability when, implement and generally comprise：Each UE reports its next frame business datum amount to its affiliated access point,
The result reported by the access point according to its data amount and UE, coordinates UE uplink communications duration in next radio frames and leads to descending
The communication time between duration and current access point and other access points is believed, so as to have adjusted the logical of FL and BL link in real time
Believe duration so that the duration of radio frames realizes flexible change according to actual conditions.
Example as shown in Figure 2, using subframe as time smallest allocation unit, adjusts each access in real time in units of it
The transmitting-receiving ratio or time resource allocation proportion of point and UE.It should be noted that can also be by other unit or other unit
Certain combination is used as minimum time resource allocation unit.
Example as shown in Figure 2, can regard the subframe that numbering is 1 in each radio frames as special subframe, remaining subframe
Referred to as common subframe.Wherein,
Special subframe, for carrying the respective TDM pilot tones of two access points at communication link two ends and the head of broadcast message
Portion's field, uplink access request and protection interval：TDM pilot tones positioned at header fields can be used for synchronously, including radio frames inspection
Survey, offset estimation, timing estimation etc..Within the uplink access request time, for the receipts of diverse access point or UE within the time
Hair-like state, the access point networked after being sends access request to the access point first networked, or UE wants connection to it
Access point sends access request；Or the access point first networked receives its backward access point or the access of the UE under its coverage
Request.Protection interval is not less than the transmission time and system processing time sum for maximum distance of eating dishes without rice or wine, and protection interval can be set
For fixed duration, can also in real time it be adjusted according to distance change of eating dishes without rice or wine.Broadcast message positioned at header fields can transmit application
System control information in the wireless frame duration, including up-downgoing proportioning, user resources proportioning etc. parameter.
It should be noted that special subframe can also be in the other positions of radio frames, number can also be multiple, also may be used
To add the other information in a certain particular system.
Common subframe, for carrying FDM pilot tones and business datum.FDM pilot tones and TDM pilot tones can be used for channel estimation
Deng.
Example as shown in Figure 2, a common subframe is divided into M time slot, M>1, when each time slot has certain continue
Between, such as 0.5ms.Each time slot is made up of K symbol, K>1, such as 6 OFDM symbols, symbol is the time minimum in frame structure
Unit, the number of symbol is relevant with the length of time slot with symbol time.The duration of time slot can be it is fixed or
It is being adjusted in real time according to the business demand of real system, unfixed.
Radio frames, subframe, time slot in Fig. 2, symbol can also be referred to as some other terms.
From the point of view of citing, in a specific embodiment, it is assumed that a certain radio frames continue 10ms.In this radio frames,
Comprising N=10 subframe, each subframe continues 1ms.Each subframe is divided into M=2 time slot, each time-slot duration 0.5ms.
It is divided into 6 OFDM symbols in each time slot, each OFDM symbol has 2560 chips, duration 83.3us.N, M and K also may be used
To be 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 one three layers of radio frames knot
Structure, it supports a variety of radiotechnics.As shown in figure 3, transmission time is divided into L radio frames, L >=1, each radio frames tool
There are certain duration, such as 5ms.Here, the duration of each radio frames can be it is fixed, isometric or
According to the Length discrepancy, flexibility and changeability of actual transceiving data amount adjustment.As shown in figure 3, when each radio frames are divided into N number of
Gap, N>1, 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, adjustment transmitting-receiving in real time in units of it
Time scale or user time resource allocation ratio.It should be noted that can also by other unit or other unit certain
Combination is used as minimum time resource allocation unit.
Example as shown in Figure 3, can regard the time slot that numbering is 1 in each radio frames as special time slot, remaining time slot
Referred to as normal slot.Wherein,
Special time slot, for carrying the respective TDM pilot tones of two access points at communication link two ends and the head of broadcast message
Portion's field, uplink access request and protection interval：TDM pilot tones positioned at header fields can be used for synchronously, including radio frames inspection
Survey, offset estimation, timing estimation etc..It should be noted that special time slot can also be in the other positions of radio frames, number
It can be multiple, the other information in a certain particular system can also be included.
Normal slot, for carrying FDM pilot tones and business datum.Example as shown in Figure 3, each normal slot is by K
Symbol is constituted, K>1, such as 6 OFDM symbols, symbol is chronomere minimum in frame structure, the number and symbol time of symbol
It is relevant with the length of normal slot.
Radio frames, time slot, symbol in Fig. 3 can also be referred to as some other terms.
From the point of view of citing, in a specific embodiment, it is assumed that a certain radio frames continue 8ms.The radio frames are divided into M=12
Individual time slot, normal slot duration 0.5ms, special time slot duration 2ms.It is divided into 6 OFDM symbols in each normal slot
Number, each OFDM symbol has 2560 chips, duration 83.3us.M and K can also be other values.
When an access point has multiple backward access points, that is, there is a plurality of FL and BL links, these FL and BL it
Between with minimum time resource allocation unit carry out resource division and multiplexing.
In addition to the wireless frame structure shown in Fig. 2 and Fig. 3, the frame structure of the present invention can also be defined as supporting a variety of
Two layers of frame structure of radiotechnics, such as, can define and N number of subframe is included in radio frames, or M are included in radio frames
Time slot etc..On the basis of the frame structure that the present invention is provided, it is that those skilled in the art provide according to the present invention to implement
What technical scheme was readily available, repeat no more here.
The present invention is by taking three layers of wireless frame structure as an example, radio frames of the Fig. 4 for the present invention by taking three layers of wireless frame structure as an example
Transmission and the schematic diagram of resource distribution embodiment, as shown in figure 4, the Hdr1 that a FL/BL is represented in a time slot, Fig. 4 is represented
TDM pilot tones 1 and broadcast message 1, Acc1 represent uplink access request 1；Hdr2 represents TDM pilot tones 2 and broadcast message 2, Acc2 tables
Show uplink access request 2.Assuming that comprising 9 time slots in radio frames in the Fig. 4, numbering is S0 to S9 respectively.
AP1, AP2, UE1/UE2, UE3/UE4 are corresponding with Fig. 1 respectively in Fig. 4, i.e. Fig. 4 is with the access system shown in Fig. 1
Based on.Assuming that AP1 is the access point first networked, the access point that AP2 networks after being therefore, in the example shown in fig. 4, will
AP1 to AP2 communication link is referred to as FL, and AP2 to AP1 communication link is referred to as into BL.FDM side is used between FL/BL and UL/DL
Formula, the communication link carried out with minimum frequency resource allocation unit between the multiplexing of frequency resource, access point accounts for total system bandwidth
A part as being B1, the link between access point and UE accounts for the remainder of total system bandwidth as being B2, and B1+B2=B, its
Middle B is system bandwidth.It should be noted that bandwidth B 1 and bandwidth B 2 are dispatched by upper strata, schedule information can be carried in head control
In word processed, other positions can also be placed on, are not limited here, and implement the public office skill for belonging to those skilled in the art
Art, is repeated no more here.TDM modes are used between FL/DL and BL/UL, time money is carried out with minimum time resource allocation unit
The multiplexing in source, in the example shown in fig. 4, minimum time resource allocation unit is a time slot, i.e., when one time FL/BL is one
Gap.
In the example shown in fig. 4, first networked relative to AP2 due to defining AP1, therefore, in special time slot, front face
Divide the TDM pilot tones 1 and broadcast message 1 for being used for carrying AP1（Hdr1 i.e. shown in Fig. 4）, and UE3/UE4 multi-upstream access please
Seek 2 i.e. Acc2；Center section is protection interval GP（As shown in the diagonal line hatches lattice in Fig. 4）, for air interface transmission, data processing
Time delay and hair receive conversion time；Aft section is used for the TDM pilot tones 2 and broadcast message 2 for carrying AP2（I.e. shown in Fig. 4
Hdr2）, and UE1/UE2 uplink access request 1 is Acc1.
So, in the previous section of special time slot, AP1, UE3/UE4 are in emission state, and AP2, UE1/UE2, which are in, to be received
State, therefore, a time slot before special time slot, it is desirable to which AP1, UE3/UE4 are at emission state, AP2, UE1/UE2
In reception state.And in the hair receipts conversion time of the aft section of special time slot, at this moment center section Jing Guo radio frames,
AP1, UE3/UE4 are in reception state, and AP2, UE1/UE2 are in emission state, therefore, in the latter one of special time slot
Gap, it is desirable to which AP1, UE3/UE4 are in reception state, AP2, UE1/UE2 are in emission state.It is right in remaining time slot of radio frames
The reiving/transmitting state of each access point and UE do not require, can be according to the data volume of particular system to current these time slots of wireless frame in
Transmitting-receiving ratio configured.
Fig. 5 is access point of the present invention and reiving/transmitting state schematic diagrames of the UE in same time slot, the example with reference to shown in Fig. 4,
AP1 keeps transmitting-receiving frame synchronization with AP2, UE1/UE2, and UE3/UE4 and AP2 keeps transmitting-receiving frame synchronization.That is, a certain access point
With the access point with keeping transmitting-receiving frame synchronization between the UE under the access point of frequency, the access point coverage, the access point with should
UE under the access point coverage of access point keeps reiving/transmitting state synchronous.
In Fig. 1, the link of direct communication is not present between the UE in the UE and Cell2 in Cell1, that is to say, that certain
The UE and UE under another access point coverage under one access point coverage is without direct communication, the control of access point
Limit can not cross over its coverage.With reference to Fig. 5, in Fig. 4, in order to clear, it is assumed that choose the time zone that time slot 2 arrives time slot 8
Between be described, UE1/UE2 sends valid data in the time interval of time slot 2 to time slot 4；The time of time slot 8 is arrived in time slot 5
Emission state is kept in interval, but does not launch any valid data；And UE3/UE4 is in the time interval of time slot 2 to time slot 4
In reception state, but any data are not received, or to the data that receive without processing；When time slot 5 arrives time slot 8
Between it is interval in, receive access point AP2 downstream data flow.
It is also understood that the UE under diverse access point coverage does not carry out valid data in identical time interval
Transmission or reception, the UE under diverse access point coverage divides different active times with time resource allocation unit, and
Reiving/transmitting state is kept in other times but valid data transmitting-receiving is not done, or in idle state（Can also be other arts
Language）.
Pass through access system of the present invention, it is ensured that transmitting for the information on region limited by environment and condition, meet
The demand of user, meanwhile, by the distribution for carrying out active time to the UE under diverse access point coverage in time, it is to avoid
These UE are favorably improved communication link quality and efficiency in the conflict and interference eating dishes without rice or wine data occur.
The resource multiplex mode between different UE under a certain access point coverage, can be in the access point coverage
Under UE active time in, from two dimensions of time and frequency, according to minimum time or frequency resource allocation unit, carry out not
With UE resource allocation.Fig. 6 (a) is the resource multiplex mode between the different UE under same access point coverage of the invention
Shown in the schematic diagram of first embodiment, such as Fig. 6 (a), in the active time of a time slot, the communication in UL or DL directions is carried out,
Different UE（Such as UEa, UEb, UEc and UEd）According to the FDM multiplex modes of frequency partition resource.Fig. 6 (b) is same for the present invention
The schematic diagram of the second embodiment of the resource multiplex mode between different UE under access point coverage, shown in such as Fig. 6 (b),
In active time, different UE（Such as UEa, UEb, UEc and UEd）The TDM multiplex modes of resource are divided according to the time.Fig. 6 (c) is
The schematic diagram of the 3rd embodiment of the resource multiplex mode between different UE under the same access point coverage of the present invention, such as schemes
Shown in 6 (c), in active time, different UE（Such as UEa, UEb, UEc, UEd.UEe and UEf）According to two dimensions of time and frequency
Degree divides the multiplex mode of resource.Different resource multiplex modes can have different flexibilities, according to the wireless of particular implementation
Communication system is selected.In figure 6 above (a)~Fig. 6 (c), abscissa represents the time, and ordinate represents frequency.
Although disclosed herein embodiment as above, described content be only readily appreciate the present invention and use
Embodiment, is not limited to the present invention.Technical staff in any art of the present invention, is taken off not departing from the present invention
On the premise of the spirit and scope of dew, any modification and change, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (8)
1. a kind of access system, it is characterised in that at least including two or more access points AP, each access point coverage
Under one or more user equipment (UE)s；
Each user equipment under each described access point, and each access point coverage carries out channel radio using similar frequency bands
Letter；Communicated between each access point using time division multiplexing mode TDM；User under diverse access point coverage sets
Communication link is not present between standby；Wherein,
Access point, for according to radio frames, by being communicated between the first link and other access points, by the second link with
Communicated between user equipment under its coverage；First link includes forward link and backward link, described the
Two links include up-link and downlink；Drawn between first link and the second link by frequency division multiplexing mode FDM
Divide resource；
User equipment under diverse access point coverage, for by the communication with access point, in the time differed
The transmission or reception of valid data are carried out in interval.
2. access system according to claim 1, it is characterised in that the radio frames at least include special part and common
Part；Wherein,
Special part, for carrying the respective TDM pilot tones of two access points of protection interval and communication link two ends, broadcast letter
The header fields and uplink access request of breath；
Normal part, at least for carrying FDM pilot tones and business datum.
3. access system according to claim 2, it is characterised in that the special part for one of the radio frames or
More than one minimum time resource allocation unit.
4. the access system according to any one of claim 2~3, it is characterised in that the TDM pilot tones are used for synchronous；
Within the uplink access request time, for the reiving/transmitting state of diverse access point or UE within the time, networked after being
Access point send access request to the access point that first networks, or UE sends access request to its access point for wanting connection；
Or the access point first networked receives its backward access point or the access request of the UE under its coverage；
The protection interval is not less than the transmission time and system processing time sum for maximum distance of eating dishes without rice or wine；
The broadcast message transmission is applied to the system control information in the wireless frame duration.
5. access system according to claim 3, it is characterised in that the use under the diverse access point coverage
Family equipment, specifically for dividing the different work for being used to carry out transmission or the reception of valid data with minimum time resource allocation unit
The jump time；And reception or transmission state are kept within remaining time but valid data transmitting-receiving is not done, or in idle state.
6. access system according to claim 3, it is characterised in that described access point includes the access of first access network
Point, and one or more access points of access network afterwards；
When the access point of the rear access network is two or more, the access point of the first access network is followed by with each
Enter the communication between the access point of network to be divided in time division multiplexing tdm mode, allocation unit is minimum time resource allocation
Unit.
7. access system according to claim 6, it is characterised in that the access point of the first access network is followed by with described
The access point for entering network keeps transmitting-receiving frame synchronization；
The access point of the first access network keeps transmitting-receiving frame synchronization with each UE under its coverage；
The access point of the rear access network keeps transmitting-receiving frame synchronization with each UE under its coverage.
8. the access system according to by claim 7, it is characterised in that the UE under each access point coverage
In, resource division is carried out with the united modes of FDM by TDM modes or FDM modes or TDM between each UE.
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