CN102301822A - Hybrid Duplexing Operation Method In Wireless Communication System, And Apparatus Thereof - Google Patents

Hybrid Duplexing Operation Method In Wireless Communication System, And Apparatus Thereof Download PDF

Info

Publication number
CN102301822A
CN102301822A CN2009801555762A CN200980155576A CN102301822A CN 102301822 A CN102301822 A CN 102301822A CN 2009801555762 A CN2009801555762 A CN 2009801555762A CN 200980155576 A CN200980155576 A CN 200980155576A CN 102301822 A CN102301822 A CN 102301822A
Authority
CN
China
Prior art keywords
tdd
mode
fdd
dual
traffic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2009801555762A
Other languages
Chinese (zh)
Other versions
CN102301822B (en
Inventor
金洛明
申秀贞
柳惠仁
姜海璘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industry Collaboration Foundation of Ewha University
Original Assignee
Industry Collaboration Foundation of Ewha University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Industry Collaboration Foundation of Ewha University filed Critical Industry Collaboration Foundation of Ewha University
Publication of CN102301822A publication Critical patent/CN102301822A/en
Application granted granted Critical
Publication of CN102301822B publication Critical patent/CN102301822B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/30—Special cell shapes, e.g. doughnuts or ring cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/04—Reselecting a cell layer in multi-layered cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data

Abstract

Disclosed are a hybrid duplexing operation method in a wireless communication system, and an apparatus thereof. The method according to the present invention comprises: a step of enabling communication in a time division duplexing (TDD) mode or frequency division duplexing (FDD) mode between a base station and a user terminal in the same cell divided into TDD and FDD zones that respectively correspond to the TDD and FDD modes, and obtaining both the location information of the user terminal and the traffic information between the user terminal and the base station; and a step of determining the duplexing mode for the user terminal according to the traffic characteristics when the user terminal passes the TDD boundary between the TDD and FDD zones. The invention is able to determine the duplexing mode in consideration of not only the location information of the user terminal but also the traffic characteristics. In addition, the invention can use the FDD and TDD resources allocated to the cell.

Description

Mixing dual-mode determining method and device in the wireless communication system
Technical field
The present invention relates to a kind of wireless communication system, relate in particular to a kind of use time division duplex and Frequency Division Duplexing (FDD) simultaneously mix dual-mode determining method and device.
Background technology
The target of new generation of wireless communication system is the various multimedia services that have characteristics on the traffic such as support voice service, broadcasting and real-time video meeting simultaneously.Therefore, in order to provide these tools miscellaneous service effectively, require to consider the asymmetry and continuity duplex (duplexing) mode of up and downlink transmission based on service feature.
The employed duplex mode of wireless communication system can be divided into time division duplex (Time Division Duplexing:TDD) mode and Frequency Division Duplexing (FDD) (Frequency Division Duplexing:FDD) mode.The TDD mode is divided into identical frequency band alternately to be switched (Switching) after the period and posts a letter and collect mail the period, and realizing two-way communication, the FDD mode is with the band segmentation of the being distributed frequency band that becomes to post a letter and collect mail, to realize two-way communication.
In the communication system based on the TDD mode, the base station can be given and to have mobility and fixed user terminal can be used in part or all of time slot allocation in the time slot, and the variable allocation by such time slot, the realization asymmetric communication.But, when the radius of society that the base station covered becomes big,, thereby reduce efficiency of transmission because of round trip delay (Round Trip Delay) causes increasing guard time (guard time) between the transceiver time slot based on the communication system of TDD mode.Therefore, be not suitable for using TDD as communication environment macrocell (macro cell), that have big radius of society.And, inequality based on the asymmetric ratio of communication system each sub-district under a plurality of (Multi) cell environment of TDD mode, therefore be between the user terminal at abutting subdistrict edge the serious frequency interference will take place.
In addition, be used to the frequency band of posting a letter and collecting mail, therefore can not produce and be used to the time delay (Time delay) of posting a letter or collecting mail owing to cut apart based on the communication system of FDD mode.Therefore, can therefore relatively not be fit to cell environment because of time delay produces round trip delay with big radius of society as macrocell.But its post a letter frequency band and collection of letters frequency band are fixed based on the communication system of FDD mode, therefore are not suitable for using and are taking the duplex mode of variable asymmetric transmission.
Therefore, consider the various communication environments and the traffic characteristics of a new generation, mixing duplex (Hybrid Duplexing) mode of two kinds of duplex modes is used in research with, to obtain all advantages of TDD mode and FDD mode.
Fig. 1 is based on an existing example that mixes the wireless communication system of duplex mode.As shown in the figure, sub-district (Cell) is divided into inner region (inner zone) and outskirt (outer zone) according to the line of demarcation, use TDD at sub-district inner region (TDD zone), to manage the asymmetric communication amount of down link and up link effectively, use FDD at sub-district outskirt (FDD zone) simultaneously, to handle the interference between the sub-district effectively.Therefore, the dual-mode of user terminal moves according to zone of living in each sub-district, is benchmark with fixing line of demarcation, moves in the TDD mode when being in the sub-district inner region, then moves in the FDD mode when being in the sub-district outskirt.
Summary of the invention
Technical problem
Described based on the existing wireless communication system that mixes duplex mode in, be standard division of cells zone with fixing line of demarcation, and use TDD and FDD mode simultaneously, thereby possess advantage separately.But, distinguish the dual-mode of user terminal based on fixing line of demarcation, the user terminal that moves in the line of demarcation only switches dual-mode according to own positional information, so has variety of issue.
For example, when the user terminal that moves in the TDD mode moved to the FDD zone by the line of demarcation, that will ignore this user terminal was directly switch to the FDD mode as the characteristics of traffic asymmetry.But, shown in following mathematical expression, the TDD mode of each user terminal and the traffic holding method of FDD mode are different, when the downlink traffic size is moved in the FDD mode with uplink traffic difference in size user terminal bigger, that have the asymmetric communication amount, will further reduce resource availability.
w k , FDD = 2 × max { w k up , w k down }
w k , TDD = w k up + w k down
At this,
w K, FDDWith w K, TDDBe respectively the traffic size that the traffic of k user terminal in FDD mode and TDD mode is occupied,
Figure BPA00001408147100023
With
Figure BPA00001408147100024
Be respectively k user's the up link and the actual traffic size of down link.That is, the TDD mode has nothing to do in the traffic difference in size of up, down link and asymmetric Resources allocation, but the FDD mode is selected the bigger side of traffic Resources allocation symmetrically in the downlink or uplink link.Therefore, during the bigger terminal of FDD mode operational communications amount asymmetry, can cause the poor efficiency of resource.
And the user terminal that enters the TDD zone from the FDD zone has the traffic attribute of symmetry, then its resource availability will not be subjected to dual-mode influence and very approaching, the dual-mode that therefore switches this user terminal only can increase the complexity of system.
Fig. 2 is the reference diagram of explanation based on another problem of the wireless communication system of existing mixing duplex mode.As shown in Figure 2, existing system is the line of demarcation, line of demarcation in TDD zone and FDD zone fixedly, therefore can't use the whole resource of distributing to TDD mode and FDD mode neatly.That is, if the zone of the TDD in the sub-district is inhomogeneous with the user distribution in FDD zone,, therefore can't use the resource of distributing to whole sub-district effectively because can't correspondingly manage TDD resource and FDD resource according to user distribution.Therefore, the user concentrates on a certain zone in two zones and when causing the traffic concentration phenomenon, the traffic will concentrate on FDD (or TDD) resource as shown in figure and cause a side inadequate resource and the inefficient situation of opposite side resource affluence.
Therefore, technical task to be solved by this invention provides a kind of mixing dual-mode determining method and device, in wireless communication system, synthetically consider to determine dual-mode behind the positional information of user terminal and the traffic characteristic, use FDD resource and the TDD resource of distributing to the sub-district effectively.
Technical scheme
In order to solve described technical task, mixing dual-mode determining method in the wireless communication system of the present invention dual-mode between base station and the user terminal in same sub-district uses time division duplex (TDD) pattern or Frequency Division Duplexing (FDD) (FDD) pattern mutual communication, described sub-district is divided into FDD zone regional corresponding to the TDD of tdd mode and corresponding to fdd mode, comprise the following steps: step (a), obtain the positional information of user terminal and the traffic information between described user terminal and the base station; And step (b), described user terminal determines the dual-mode of described user terminal according to described traffic characteristic when moving with the TDD line of demarcation of described FDD area limit line as described TDD zone.
At this, described step (b) can determine the dual-mode of described user terminal according to the asymmetry of the described traffic.
And, at described step (b), when the user terminal that communicates with tdd mode moves to described FDD zone from described TDD zone, keep tdd mode or switch to fdd mode according to the asymmetry of the described traffic.At this moment, described step (b) comprises the following steps: step (b1), utilizes the up link of described user terminal and downlink traffic size and calculates the parameter of the asymmetry degree of the described traffic of expression; And step (b2), described parameter of calculating and preset critical are compared, keep tdd mode or switch to fdd mode according to its result.
And, at described step (b), when the user terminal that communicates with fdd mode moves to described TDD zone from described FDD zone, keep fdd mode or switch to tdd mode according to the asymmetry of the described traffic.At this moment, described step (b) comprising: step (b1), and utilize the up link of described user terminal and downlink traffic size and calculate the parameter of the asymmetry degree of the described traffic of expression; And step (b2), described parameter of calculating and preset critical are compared, keep fdd mode or switch to tdd mode according to its result.
And described TDD line of demarcation can be according to the distribution of the TDD traffic in the described sub-district and the FDD traffic and decision adaptively.At this moment, at least a portion of described sub-district is divided into a plurality of sectors of distributing different frequency resource, and each sector can determine described TDD line of demarcation independently.
At this, when described each sector independently determines described TDD line of demarcation, can be according to the distribution of the TDD traffic in this sector and the FDD traffic and determine described TDD line of demarcation adaptively.At this moment, described TDD line of demarcation can determine according to the ratio of the traffic more than needed of the traffic more than needed of the tdd mode in described this sector and fdd mode.At this, the marginal determining method of described TDD can comprise the following steps: to calculate parameter, the ratio of the traffic more than needed of the described tdd mode of this parametric representation and the traffic more than needed of described fdd mode; Compare at the described parameter of calculating and first preset critical, optionally expand described TDD line of demarcation according to its result; And compare at the described parameter of calculating and second preset critical, optionally shrink described TDD line of demarcation according to its result.
And, can determine the maximum that the described TDD line of demarcation of each sector can have according to interference from the peripheral cell of described sub-district.At this moment, the maximum that described TDD line of demarcation can have can be according to the Signal to Interference plus Noise Ratio decision of this sector, and this Signal to Interference plus Noise Ratio is inferred according to the user distribution model and the transferring electric power information that are converged from the peripheral cell base station of described sub-district.
In order to solve described technical task, mixing dual-mode determination device in the wireless communication system of the present invention dual-mode between base station and the user terminal in same sub-district uses time division duplex (TDD) pattern or Frequency Division Duplexing (FDD) (FDD) pattern mutual communication, described sub-district is divided into FDD zone regional corresponding to the TDD of tdd mode and corresponding to fdd mode, and comprise: terminal location and traffic information acquiring unit, obtain the positional information of user terminal and the traffic information between described user terminal and the base station; And dual-mode decision unit, when described user terminal moves in the TDD line of demarcation of and described FDD area limit line regional as described TDD, determine the dual-mode of described user terminal according to described traffic characteristic.
At this, described dual-mode decision unit can determine the dual-mode of described user terminal according to the asymmetry of the described traffic.At this moment, described dual-mode decision unit can be kept tdd mode or switch to fdd mode when the user terminal that communicates with tdd mode moves to described FDD zone from described TDD zone according to the asymmetry of the described traffic.And described dual-mode decision unit can be kept fdd mode or switch to tdd mode when the user terminal that communicates with fdd mode moves to described TDD zone from described FDD zone according to the asymmetry of the described traffic.
And described dual-mode determination device can also comprise TDD line of demarcation information updating unit, according to the distribution of the TDD traffic in the described sub-district and the FDD traffic and determine described TDD line of demarcation adaptively.At this moment, at least a portion of described sub-district is divided into a plurality of sectors of distributing different frequency resource, and described TDD line of demarcation information updating unit can determine the described TDD line of demarcation of each sector independently.
And described dual-mode determination device also comprises TDD boundary district decision unit, determines the maximum that the described TDD line of demarcation of each sector can have according to the interference from the peripheral cell of described sub-district.
Beneficial effect
Described the present invention considers position information of user's terminal and traffic characteristic simultaneously when wireless communication system decision dual-mode, can use FDD resource and the TDD resource of distributing to the sub-district expeditiously.
Description of drawings
Fig. 1 is based on one of the existing wireless communication system that mixes duplex mode for example.
Fig. 2 is the reference diagram of explanation based on another problem of the wireless communication system of existing mixing duplex mode.
Fig. 3 has shown the cell structure and the Frequency Distribution of the mixing dual-mode determining method in the wireless communication system of one embodiment of the invention.
Fig. 4 is the flow chart of the dual-mode determining method of one embodiment of the invention.
Fig. 5 is that one embodiment of the invention is correspondingly determining the marginal method flow diagram of TDD.
Fig. 6 is the figure that the TDD line of demarcation of each sector of one embodiment of the invention is expanded or shunk according to unit distance.
Fig. 7 is the calcspar of the mixing dual-mode determination device in the wireless communication system of one embodiment of the invention.
Fig. 8 abandons (dropping) probability simulation figure as a result based on user moving speed in one embodiment of the invention.
Fig. 9 is based on the drop probability analog result figure of the user's ratio that requires the asymmetric communication amount in one embodiment of the invention.
Embodiment
Below with reference to accompanying drawing the preferred embodiment of the present invention will be described in detail.In below the explanation and accompanying drawing, actual identical inscape will use same pictorial symbolization to avoid repeat specification.In explanation when of the present invention,, will omit its detailed description if think that the relevant known configurations or the related description of function may obscure purport of the present invention.
Fig. 3 has shown the cell structure and the Frequency Distribution of the mixing dual-mode determining method in the wireless communication system of one embodiment of the invention.
The mixing dual-mode determining method of present embodiment is, in same sub-district, use tdd mode or fdd mode to communicate mutually as dual-mode between base station and the user terminal, the sub-district then is divided into FDD zone regional corresponding to the TDD of tdd mode and corresponding to fdd mode.
See also the cell structure shown in Fig. 3 (a), a part of inner region of sub-district, for example the inside, line of demarcation (hereinafter to be referred as " field, TDD sector ") that indicated of this figure dotted line is divided into a plurality of (present embodiment the is 3) sector that is assigned the distinct frequencies resource.As Fig. 3 (a) with (b) shown in, each sector in field, TDD sector has been distributed different frequency resource f1, f2, f3 basically, the FDD zone of field, TDD sector outside then is assigned other frequency resource in addition.
Each sector utilizes as the TDD zone again and is divided with the marginal TDD of FDD dividing region line of demarcation (illustrated solid line).The TDD line of demarcation of each sector will be at the independent decision with the distribution of the traffic of each sector.Dual-mode when each sector then determines that according to the traffic characteristic of this user terminal user terminal moves in the TDD line of demarcation.
And the TDD line of demarcation of each sector is by the noncontinuity line of demarcation k of certain intervals I, jThe R definition.
At this moment, the TDD line of demarcation can be maximum k MaxR and the minimum value k that can have MinValue between the R.At this, R is a radius of society, coefficient k I, jIt is the radius in TDD zone that expression is equivalent to i sector of j sub-district.
Therefore, k I, jCan represent by following mathematical expression.
Mathematical expression 1
0＜k min＜k i，j＜k max＜1
The base station is for to according to the traffic distribution in the sub-district and the TDD line of demarcation of respective change provides the tdd mode service to adjust transferring electric power.Therefore need be for following user terminal provide transferring electric power in addition, this user terminal is in outside, TDD line of demarcation, that is moves with TDD the line of demarcation from the TDD line of demarcation to field, TDD sector.
(k till from the marginal maximum of TDD to the line of demarcation of sub-district MaxR～R) only move in the FDD mode, (0～k till the marginal minimum value from center of housing estate portion to TDD MinR) then only move in the TDD mode.And, (k between marginal maximum of TDD and minimum value MinR～k MaxR) zone basically, is moved in the FDD mode in the FDD zone, then moves in the TDD mode in the TDD zone.But the user terminal that moves in the TDD line of demarcation is then according to the traffic characteristic between this user terminal and the base station, kept original dual-mode or switched to dual-mode corresponding to the zone of being moved by base station selected.Therefore, with the user terminal of fdd mode operation from k MinR is distributed to the line of demarcation, sub-district, and the user terminal that moves with tdd mode then is distributed to k from cell centre MaxR.
In addition, the TDD line of demarcation of each sector is upgraded according to some cycles, for this reason, allows the coefficient of expression TDD zone radius change according to certain α of unit at each fixed cycle T shown in the following row mathematical expression.
Mathematical expression 2
k i，j(t+T)＝k i，j(t)+α，0＜α＜1
Dual-mode determining method according to described cell structure and each user terminal, basically according to customer location decision tdd mode and fdd mode, when user terminal moves in the TDD line of demarcation, promptly from the TDD zone to FDD zone move or from the FDD zone when the TDD zone is mobile, determine duplex mode according to the traffic attribute of this user terminal.And, according to the traffic distribution of whole sub-district and correspondingly determine the TDD line of demarcation.
At first, the specific embodiment at the dual-mode determining method of each user terminal describes.Fig. 4 is the flow chart of the dual-mode determining method of one embodiment of the invention.In the present embodiment, basically, the base station determines dual-mode according to user terminal location, if user terminal moves in the TDD line of demarcation, then according to whether satisfied certain condition based on traffic characteristic determines to keep current dual-mode or switches to other pattern.Prerequisite in the following description is, moves with tdd mode when active user's terminal is positioned at the TDD zone, moves with fdd mode when being positioned at the FDD zone.
The base station obtains the positional information of user terminal and the traffic information (step 400) of up link between user terminal and the base station and down link.In addition, the base station has the marginal relevant information of TDD of each sector, the then periodic continuous updating of this information.Whether the base station monitoring user terminal moves (step 410) in the TDD line of demarcation, if user terminal moves in the TDD line of demarcation, then calculates (step 415) at the parameter of expression traffic asymmetry degree.Described parameter lambda at k user terminal kCan use following mathematical expression to calculate.
Mathematical expression 3
λ k = max { w k up , w k down } min { w k up , w k down }
At this,
Figure BPA00001408147100082
With
Figure BPA00001408147100083
Represent the up link of k user terminal and the actual traffic size of down link respectively.As described shown in the mathematical expression, λ kValue big more, the asymmetry of the traffic is big more.
If the user terminal that moves in the TDD line of demarcation is the user terminal (step 420) that moves to the FDD zone from the TDD zone, checks and whether satisfy following mathematical expression (step 425) simultaneously.
Mathematical expression 4
λ k＜ε， w total , FDD - w FDD ≥ 2 × max { w k up , w k down }
In first formula, ε is the predefine value, is a kind of critical value of the traffic asymmetry that can overcome when using resource in the FDD mode.That is, as long as λ kLess than ε, even use the FDD mode, the inefficiencies of resource use aspect can not form big problem yet.Second formula is represented the traffic that the FDD zone can further the hold needed traffic when moving k terminal with fdd mode.At this,
w Total, FDDThe open ended total traffic capacity size of frequency band in expression FDD zone,
w FDDRepresent the current traffic sum of accepting the user terminals of service with fdd mode.
w FDDCan use following mathematical expression to calculate.
Mathematical expression 5
w FDD = Σ K = 1 N w k , FDD
At this, N represents to accept with fdd mode the quantity of the user terminal of service.
Therefore, if satisfy described mathematical expression 4, then the dual-mode of this user terminal is switched to fdd mode (step 430) from tdd mode.
In addition, if do not satisfy described mathematical expression 4, then the dual-mode of this user terminal is maintained tdd mode (step 440).At this moment, leave the TDD zone and, therefore should distribute transferring electric power in addition owing to user terminal for the frequency of utilization of this user terminal away from the base station.For the user terminal of having kept dual-mode, periodically check whether to satisfy described mathematical expression 4 in step 425 again, if satisfy then dual-mode is switched to fdd mode (step 430).
The user terminal that moves in the TDD line of demarcation then checks whether satisfy following mathematical expression (step 445) simultaneously if move to the user terminal (step 420) in TDD zone from the FDD zone.
Mathematical expression 6
λ k＞ε， w i , total , TDD - w i , TDD ≥ w k , i up + w k , i down
In first formula, if λ kThen asymmetry is bigger greater than ε, and expression needs to use tdd mode for the poor efficiency that reduces resource uses.Second formula is represented the traffic that the TDD zone of i sector can further the hold needed traffic when moving k terminal with tdd mode.At this,
w I, total, TDDRepresent the open ended total traffic capacity size of frequency band that the TDD zone of i sector under this user terminal is distributed,
w I, TDDRepresent the current traffic sum of accepting the user terminals of service i sector with tdd mode.
w I, TDDCan use following mathematical expression to calculate.
Mathematical expression 7
w i , TDD = Σ K = 1 K i w k , i , TDD
At this,
k iBe illustrated in i sector and accept the quantity of the user terminal of service with tdd mode.
Therefore, if satisfy described mathematical expression 6, then the dual-mode of this user terminal is switched to tdd mode (step 450) from fdd mode.
In addition, if can't satisfy described mathematical expression 6, the dual-mode of this user terminal will be kept fdd mode (step 455).For the user terminal of keeping fdd mode, periodically check whether satisfy following mathematical expression (step 460), if satisfy, then dual-mode is switched to tdd mode (step 450) from fdd mode.
Mathematical expression 8
w FDD＞a， w i , total , TDD - w i , TDD ≥ w k , i up + w k , i down
Second formula of described mathematical expression 8 is identical with second formula of described mathematical expression 6, acting as of first formula switches to tdd mode to the user terminal with the fdd mode operation in the TDD zone when the current traffic sum of accepting the user terminals of service with fdd mode surpasses preset critical a.So just can prevent the phenomenon of traffic concentration in the FDD resource.
In the aforementioned embodiment, the switching of dual-mode or keep and to carry out according to following manner.From the pilot signal that the base station receives, comprise dual-mode switching index at user terminal.When the dual-mode of certain user terminal is switched in base station decision, the described index of pilot signal is made into 1 or make 0 into from 1 from 0.So, user terminal learns that according to the change of the described index of the pilot signal of base station transmission the dual-mode of oneself will be switched at next frame, and this user terminal is finished switching at next frame with other dual-mode operation.
Below at according to the traffic distribution of whole sub-district and correspondingly determine the specific embodiment of the marginal method of TDD to describe.In the present embodiment, mixing under the duplex environment a plurality of noncontinuity TDD of inner definition line of demarcation, and correspondingly expansion or contraction TDD line of demarcation according to the traffic distribution of tdd mode and fdd mode in the sub-district.
As previously mentioned, when determining the dual-mode of each user terminal, may allow the tdd mode in the sub-district and the traffic of fdd mode distribute more unevenly according to the traffic attribute of the user terminal that moves.Sometimes, can also take place with tdd mode continually or concentrate on the phenomenon of center of housing estate portion or sub-district gabarit with the user terminal of fdd mode operation.
Fig. 5 is that one embodiment of the invention is correspondingly determining the marginal method flow diagram of TDD.The embodiment that the following describes is at i sector in a plurality of sectors in the sub-district, and the method for present embodiment will be carried out independently in each sector.
According to some cycles, utilize following mathematical expression calculating parameter γ at i the sector in field, TDD sector i, this parametric representation is equivalent to the ratio (step 510) of the traffic more than needed of the traffic more than needed of tdd mode of this sector and fdd mode.
Mathematical expression 9
γ i = ( w i , total , TDD - w i , TDD ) / w i , total , TDD ( w total , FDD - w FDD ) / w total , FDD
At this, w I, total, TDDRepresent the open ended total traffic capacity size of frequency band that the TDD zone of i sector is distributed, w I, TDDRepresent the current traffic sum of accepting the user terminals of service i sector with tdd mode, w Total, FDDThe open ended total traffic capacity size of frequency band in expression FDD zone, w FDDRepresent the current traffic sum of accepting the user terminals of service with fdd mode.Therefore, according to described mathematical expression 9, γ iThe traffic more than needed of big more tdd mode is many more, γ iThe traffic more than needed of more little fdd mode is many more.
Therefore, in the present embodiment, more described γ iWith preset critical, the more current traffic sum w that accepts the user terminals of service with fdd mode FDDWith preset critical, expand the TDD line of demarcation according to its result then.Specifically, check and whether satisfy the condition (step 520) that following mathematical expression proposes,, then expand TDD line of demarcation (step 530) if satisfy.In described mathematical expression 2, the coefficient of representing the TDD zone radius is increased certain a of unit, with expansion TDD line of demarcation.
Mathematical expression 10
γ i≥η E，w FDD＞β E
At this, η EWith β ERepresent in order to expand the TDD line of demarcation respectively and γ iCritical value that compares and w FDDThe critical value that compares.
In described mathematical expression 2, the coefficient of representing the TDD zone radius is increased described certain a of unit, just can expand the TDD line of demarcation.
Meanwhile, more described γ iWith other preset critical, the more current traffic sum w that accepts the user terminals of service i sector with tdd mode I, TDDWith preset critical, shrink the TDD line of demarcation according to its result then.
Specifically, check the condition (step 540) that whether satisfies following mathematical expression,, then shrink TDD line of demarcation (step 550) if satisfy.In described mathematical expression 2, reduce certain a of unit at the coefficient of representing the TDD zone radius, just can shrink the TDD line of demarcation.
Mathematical expression 11
γ i≤η S，w i，TDD＞β S
At this, η SWith β SRepresent in order to shrink the TDD line of demarcation respectively and γ iCritical value that compares and w I, TDDThe critical value that compares.
In addition, when the marginal expansion of TDD and shrink when taking place repeatedly continuously,, preferably, in the TDD zone of new expansion, temporarily limit service with the user terminal that tdd mode moves for beginning if its number of times has surpassed M time as preset times.And, consider and abutting subdistrict between interference, should prevent that the marginal expansion of TDD from exceeding the marginal boundary of the TDD district (field, TDD sector) of prior setting.
Fig. 6 is the figure that the TDD line of demarcation of each sector of one embodiment of the invention is expanded or shunk according to unit distance.As shown in Figure 6, the TDD line of demarcation is at least radius d ' (=k MinR) with maximum radius d (=k MaxR) shrink or expansion according to unit distance between.
Further say, in one embodiment of this invention, under the situation of the user distribution of considering peripheral cell and interference, at each user terminal allocated frequency band, the marginal boundary of the TDD district when decision correspondingly moves the TDD line of demarcation.
Reference BTS in this sub-district is collected frequency band allocation information, user terminal distributed model from the base station of peripheral cell, the desired TDD line of demarcation at each sector of peripheral cell is worth and the transferring electric power of each sector.
In this sub-district, the FDD zone with the user terminal of tdd mode operation for and peripheral cell between interference ratio fragile, therefore be the frequency band of basic priority allocation with the frequency band allocation information of the peripheral cell of described collection etc., can avoid and be distributed in the employed frequency field repetition of user terminals of abutting subdistrict gabarit like this at these user terminals.
And, with collected user terminal distributed model is basis definition weighted value, this weighted value is represented the user terminal intensity of the corresponding sector of peripheral cell, give and calculate the interference between this sub-district and peripheral cell in the ul transmissions behind this weighted value, utilize its result to infer up link Signal to Interference plus Noise Ratio (SINR) again.Then, be that the interference between this sub-district and peripheral cell in the downlink transmission is calculated on the basis with the power information of posting a letter of each collected sector, utilize its result to infer the down link Signal to Interference plus Noise Ratio again.
Based on up link and the down link Signal to Interference plus Noise Ratio that calculates like this, determine the marginal boundary of the TDD district of each sector.Concrete deciding means is that the radius in the big more boundary of Signal to Interference plus Noise Ratio district is more little, the radius in the more little boundary of Signal to Interference plus Noise Ratio district is big more.The radius in boundary district can by illustrated, expression TDD marginal peaked coefficient k MaxDefinition.
Fig. 7 is the calcspar of the mixing dual-mode determination device in the wireless communication system of one embodiment of the invention, and this device is installed in the base station of sub-district.The mixing dual-mode determination device of present embodiment is carried out described mixing dual-mode determining method, therefore, even omitted below, the content that preamble is put down in writing at mixing dual-mode determining method still is used in the mixing dual-mode determination device of present embodiment.As shown in the figure, mix the dual-mode determination device and comprise TDD and FDD resource operating position acquiring unit 710, dual-mode decision unit 720, terminal location and traffic information acquiring unit 730, TDD line of demarcation information updating unit 740, decision unit 750, TDD boundary district, peripheral cell information acquisition unit 760.
Terminal location and traffic information acquiring unit 730 obtain positional information and the up link between each user terminal and the base station and the traffic information of down link of user terminals in the sub-district.
TDD and FDD resource operating position acquiring unit 710 obtain TDD and the FDD resource operating position in the sub-district, for example, accept in the traffic sum, each sector of the user terminals of service to accept the relevant information of traffic sum etc. of the user terminals of service in the sub-district with tdd mode with fdd mode.In addition, TDD and FDD resource operating position acquiring unit 710 also have following message, the relevant information of the open ended total traffic capacity size of frequency band that the TDD zone of the open ended total traffic capacity size of the frequency band in FDD zone, each sector is assigned with etc.
TDD line of demarcation information updating unit 740 has stored the marginal relevant information of the TDD of each sector in the sub-district, correspondingly determines the TDD line of demarcation according to the traffic distribution in the sub-district.TDD line of demarcation information updating unit 740 obtains the information obtained in order to carry out marginal expansion of TDD or contraction and the TDD line of demarcation information updating operation in view of the above the TDD line of demarcation of each sector is regularly kept, expanded or shrink and so on from TDD and FDD resource operating position acquiring unit 710.The TDD line of demarcation can be by the coefficient k that has illustrated I, jDefinition, this coefficient is represented the TDD zone radius of each sector, TDD line of demarcation information can be learnt with reference to this coefficient information in 720 of unit of aftermentioned dual-mode decision.The action of TDD line of demarcation information updating unit 740 determines accordingly that with shown in Figure 5 the related description of the marginal method of TDD is identical, therefore will not describe in detail.
The TDD that the position information of user's terminal that is obtained according to terminal location and traffic information acquiring unit 730 and traffic information, TDD and FDD resource operating position acquiring unit 710 are obtained and the relevant information of FDD resource operating position, from the TDD line of demarcation information of TDD line of demarcation information updating unit 740, dual-mode decision unit 720 can determine to switch or keep its dual-mode at user terminal traffic characteristic according to this user terminal when move in the TDD line of demarcation.The action of dual-mode decision unit 720 is identical with the related description of dual-mode determining method shown in Figure 4, therefore will not describe in detail.
The result that dual-mode decision unit 720 is determined will the switching as dual-mode be transferred to this user terminal with index by transmitting device (not shown) in pilot signal.
Peripheral cell information acquisition unit 760 is collected frequency band allocation information, user terminal distributed model from the base station of peripheral cell, the desired TDD line of demarcation at each sector of peripheral cell is worth and the transferring electric power of each sector.For this reason, in the present embodiment, each base station is given peripheral base station the described information periodic transmission of the sub-district of oneself.
Decision unit 750, TDD boundary district determines the boundary district according to the user distribution and the interference of peripheral cell, and this boundary district is the marginal boundary of the TDD district when moving the TDD line of demarcation accordingly.And, as the value in decision boundary district, the front illustrate, represent the marginal peaked coefficient k of TDD MaxBe transferred to TDD line of demarcation information updating unit 740 after being determined.So, TDD line of demarcation information updating unit 740 can prevent that the marginal expansion of TDD from exceeding decision 750 defined boundary districts, unit, TDD boundary district when the TDD line of demarcation of each sector of decision.The decision process in the boundary district, action TDD line of demarcation that illustrated with the front, when correspondingly moving the TDD line of demarcation of decision unit 750, TDD boundary district is identical, therefore will not describe in detail.
Fig. 8 and Fig. 9 be respectively in the described embodiment of the invention based on user moving speed abandon (dropping) probability and based on the drop probability analog result figure of the user's ratio that requires the asymmetric communication amount.In this simulation, supposed three types scene as shown in the tablely.First scene is best (BEST) type, peripheral cell is with the scope operation TDD zone of minimum, second scenario is common (NORMAL) type, the TDD zone is moved with TDD line of demarcation at random in each sector of peripheral cell, the 3rd scene is the poorest (WORST) type, and peripheral cell is with the scope operation TDD zone of maximum.Best type be equivalent to and peripheral cell between the minimum relatively environment of interference, the poorest type then be equivalent to and peripheral cell between the maximum relatively environment of interference.
Table 1
BEST Peripheral cell is with the scope operation TDD zone of minimum.
NORMAL The TDD district is moved with TDD line of demarcation at random in each sector of peripheral cell
The territory.
WORST Peripheral cell is with the scope operation TDD zone of maximum.
Fig. 8 and Fig. 9 have also shown all types of drop probabilities when existing mixing dual-mode determines.As shown in Figure 8, the average speed of user terminal is high more, and best type and general type are high more with respect to existing improvement degree when mixing dual-mode and determining.As shown in Figure 9, require the many more drop probabilities of user of asymmetric communication amount all to increase more, the improvement degree when also determining with respect to existing mixing dual-mode as can be seen more increases.
Described the present invention distinguishes field, TDD sector in the sub-district of mixing duplex environment with a plurality of sectors, go out to distinguish the TDD line of demarcation in TDD zone and FDD zone at each sector definition, based on the traffic characteristic of user terminal and the traffic distribution in the sub-district, for carrying out effective traffic management and continue to provide service at the mobile user terminal in TDD zone and FDD zone.According to the traffic characteristic of the user terminal that moves in the TDD line of demarcation and presently used traffic conditions and at each user terminal selecting dual-mode, thereby significantly improve the efficiency that resource is used.And, owing to correspondingly determine the TDD line of demarcation according to the traffic distribution in the sub-district, therefore can be corresponding neatly according to TDD with FDD and the traffic characteristic that differently defines, meanwhile, the poor efficiency that can also as far as possible reduce the resource that asymmetry caused of user traffic in each pattern of TDD and FDD uses.And; in order from the interference of peripheral cell, to grant asylum; under the situation of the user distribution of considering peripheral cell and interference; interfere the infringement that is caused at each user terminal allocated frequency band to reduce, the interference increase phenomenon of specifying the marginal maximum extent of TDD to be caused to prevent the TDD area extension.Therefore, the present invention goes for following system, and this system serves as that the efficiency that can increase resource under the duplex environment is constantly being mixed on the basis with the traffic characteristic of user terminal with moving.
In addition, described embodiments of the invention can be made into the program of being carried out by computer, and can carry out on the general digital of described program (Digital) computer and realize using computer-readable to get the type recording medium.Described computer-readable is got the storing media that the type recording medium comprises magnetic storing media (for example, ROM, floppy disk, hard disk etc.), optics interpretation media (for example, CD, DVD etc.) and carrier wave transmission of the Internet (for example, via) and so on.
Preamble describes in detail the present invention with preferred embodiment in conjunction with the accompanying drawings, but it only is that the present invention is done explanation rather than limits the present invention, in technological thought category of the present invention, can detailed description according to the present invention realize various distortion and modification, this is very tangible same industry personage, therefore the real interest field of the present invention should determine according to the technological thought of claim scope and equivalence range thereof, for any simple modification that this embodiment did and the spirit and the scope that change neither disengaging the present invention.

Claims (20)

1. dual-mode determining method, the mixing dual-mode determining method that is used for wireless communication system, it is characterized in that, dual-mode in same sub-district between base station and the user terminal uses time division duplex (TDD) pattern or Frequency Division Duplexing (FDD) (FDD) pattern mutual communication, described sub-district is divided into corresponding to the TDD of tdd mode zone with corresponding to the FDD zone of fdd mode, comprises the following steps:
Step (a) is obtained the positional information of user terminal and the traffic information between described user terminal and the base station; And
Step (b), described user terminal determine the dual-mode of described user terminal according to described traffic characteristic when moving as the TDD line of demarcation of described TDD zone and described FDD area limit line.
2. dual-mode determining method according to claim 1 is characterized in that:
At described step (b), determine the dual-mode of described user terminal according to the asymmetry of the described traffic.
3. dual-mode determining method according to claim 2 is characterized in that:
At described step (b), when the user terminal that communicates with tdd mode moves to described FDD zone from described TDD zone, keep tdd mode or switch to fdd mode according to the asymmetry of the described traffic.
4. dual-mode determining method according to claim 3 is characterized in that,
Described step (b) comprising:
Step (b1) is utilized the up link of described user terminal and downlink traffic size and is calculated the parameter of the asymmetry degree of the described traffic of expression; And
Step (b2), more described parameter of calculating and preset critical are kept tdd mode or are switched to fdd mode according to its result.
5. dual-mode determining method according to claim 2 is characterized in that:
At described step (b), when the user terminal that communicates with fdd mode moves to described TDD zone from described FDD zone, keep fdd mode or switch to tdd mode according to the asymmetry of the described traffic.
6. dual-mode determining method according to claim 5 is characterized in that,
Described step (b) comprises the following steps:
Step (b1) is utilized the up link of described user terminal and downlink traffic size and is calculated the parameter of the asymmetry degree of the described traffic of expression; And
Step (b2), more described parameter of calculating and preset critical are kept fdd mode or are switched to tdd mode according to its result.
7. dual-mode determining method according to claim 1 is characterized in that:
According to the distribution of the TDD traffic in the described sub-district and the FDD traffic and determine described TDD line of demarcation adaptively.
8. dual-mode determining method according to claim 7 is characterized in that:
At least a portion of described sub-district is divided into a plurality of sectors of distributing different frequency resource, and each sector determines described TDD line of demarcation independently.
9. dual-mode determining method according to claim 8 is characterized in that:
When described each sector independently determines described TDD line of demarcation, according to the distribution of the TDD traffic in this sector and the FDD traffic and determine described TDD line of demarcation adaptively.
10. dual-mode determining method according to claim 9 is characterized in that:
Described TDD line of demarcation determines according to the ratio of the traffic more than needed of the tdd mode in described this sector and the fdd mode traffic more than needed.
11. dual-mode determining method according to claim 10 is characterized in that,
The marginal determining method of described TDD comprises the following steps:
Calculate parameter, the ratio of the traffic more than needed of the described tdd mode of this parametric representation and the traffic more than needed of described fdd mode;
The described parameter of calculating and first preset critical are compared, optionally expand described TDD line of demarcation according to its result; And
The described parameter of calculating and second preset critical are compared, optionally shrink described TDD line of demarcation according to its result.
12. dual-mode determining method according to claim 8 is characterized in that:
Can determine the maximum that the described TDD line of demarcation of each sector can have according to interference from the peripheral cell of described sub-district.
13. dual-mode determining method according to claim 12 is characterized in that:
The maximum that described TDD line of demarcation can have is according to the Signal to Interference plus Noise Ratio decision of this sector, and this Signal to Interference plus Noise Ratio is inferred according to the user distribution model and the transferring electric power information that are converged from the peripheral cell base station of described sub-district.
14. dual-mode determination device, the mixing dual-mode determination device that is used for wireless communication system, it is characterized in that, dual-mode in same sub-district between base station and the user terminal uses time division duplex (TDD) pattern or Frequency Division Duplexing (FDD) (FDD) pattern mutual communication, described sub-district is divided into corresponding in the TDD of tdd mode zone with corresponding to the FDD zone of fdd mode, and comprises:
Terminal location and traffic information acquiring unit obtain the positional information of user terminal and the traffic information between described user terminal and the base station; And
Dual-mode decision unit when described user terminal moves in the TDD line of demarcation of and described FDD area limit line regional as described TDD, determines the dual-mode of described user terminal according to described traffic characteristic.
15. dual-mode determination device according to claim 14 is characterized in that:
Described dual-mode decision unit determines the dual-mode of described user terminal according to the asymmetry of the described traffic.
16. dual-mode determination device according to claim 15 is characterized in that:
When the user terminal that communicates with tdd mode moved to described FDD zone from described TDD zone, described dual-mode decision unit was kept tdd mode or is switched to fdd mode according to the asymmetry of the described traffic.
17. dual-mode determination device according to claim 15 is characterized in that:
When the user terminal that communicates with fdd mode moved to described TDD zone from described FDD zone, described dual-mode decision unit was kept fdd mode or is switched to tdd mode according to the asymmetry of the described traffic.
18. dual-mode determination device according to claim 14 is characterized in that:
Also comprise TDD line of demarcation information updating unit, according to the distribution of the TDD traffic in the described sub-district and the FDD traffic and determine described TDD line of demarcation adaptively.
19. dual-mode determination device according to claim 18 is characterized in that:
At least a portion of described sub-district is divided into a plurality of sectors of distributing different frequency resource,
Described TDD line of demarcation information updating unit can determine the described TDD line of demarcation of each sector independently.
20. dual-mode determination device according to claim 19 is characterized in that:
Also comprise TDD boundary district decision unit, determine the maximum that the described TDD line of demarcation of each sector can have according to interference from the peripheral cell of described sub-district.
CN200980155576.2A 2009-01-29 2009-01-30 Mixing dual-mode determining method in wireless communication system and device Active CN102301822B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020090007036A KR101032074B1 (en) 2009-01-29 2009-01-29 Method and apparatus for operating hybrid duplexing in wireless communication system
KR10-2009-0007036 2009-01-29
PCT/KR2009/000469 WO2010087536A1 (en) 2009-01-29 2009-01-30 Hybrid duplexing operation method in wireless communication system, and apparatus thereof

Publications (2)

Publication Number Publication Date
CN102301822A true CN102301822A (en) 2011-12-28
CN102301822B CN102301822B (en) 2015-08-05

Family

ID=42395774

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200980155576.2A Active CN102301822B (en) 2009-01-29 2009-01-30 Mixing dual-mode determining method in wireless communication system and device

Country Status (3)

Country Link
KR (1) KR101032074B1 (en)
CN (1) CN102301822B (en)
WO (1) WO2010087536A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103648190A (en) * 2013-12-25 2014-03-19 大唐移动通信设备有限公司 Method and device for determining wireless protocol utilized in access of terminal
WO2017173621A1 (en) * 2016-04-07 2017-10-12 Qualcomm Incorporated Mitigation of ue-ue interference in flexible duplex mode
US9813923B2 (en) 2013-08-27 2017-11-07 Huawei Technologies Co., Ltd. Duplex mode adaptive method and apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102053826B1 (en) * 2018-02-28 2019-12-09 단국대학교 산학협력단 Apparatus and method for managing cellular system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020173277A1 (en) * 2001-05-16 2002-11-21 Ntt Docomo, Inc. Mobile communication systems
CN1538640A (en) * 2003-01-29 2004-10-20 ���ǵ�����ʽ���� Wireless communication system and method for offering hybrid duplexing technology
CN101043313A (en) * 2003-07-31 2007-09-26 三星电子株式会社 Method for base station using orthogonal frequency division multiplexing to send and recept data

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100969749B1 (en) * 2004-10-11 2010-07-13 삼성전자주식회사 Resources allocation method in improved hybrid duplexing technology-based cellular communication system
KR20060064926A (en) * 2004-12-09 2006-06-14 삼성전자주식회사 Method for switching mode and band in a multi-mode and multi-band system
KR100747083B1 (en) * 2006-04-27 2007-08-08 고려대학교 산학협력단 Unified radio resource management method and base station for hybrid division duplex system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020173277A1 (en) * 2001-05-16 2002-11-21 Ntt Docomo, Inc. Mobile communication systems
CN1538640A (en) * 2003-01-29 2004-10-20 ���ǵ�����ʽ���� Wireless communication system and method for offering hybrid duplexing technology
CN101043313A (en) * 2003-07-31 2007-09-26 三星电子株式会社 Method for base station using orthogonal frequency division multiplexing to send and recept data

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9813923B2 (en) 2013-08-27 2017-11-07 Huawei Technologies Co., Ltd. Duplex mode adaptive method and apparatus
CN103648190A (en) * 2013-12-25 2014-03-19 大唐移动通信设备有限公司 Method and device for determining wireless protocol utilized in access of terminal
WO2017173621A1 (en) * 2016-04-07 2017-10-12 Qualcomm Incorporated Mitigation of ue-ue interference in flexible duplex mode

Also Published As

Publication number Publication date
KR101032074B1 (en) 2011-05-02
KR20100087952A (en) 2010-08-06
CN102301822B (en) 2015-08-05
WO2010087536A1 (en) 2010-08-05

Similar Documents

Publication Publication Date Title
Xiao et al. Spectrum resource sharing in heterogeneous vehicular networks: A noncooperative game-theoretic approach with correlated equilibrium
CN102026287B (en) Method for cooperative transmission within heterogeneous stations
CN101669384B (en) Method and apparatus of measurement mechanism and efficient paging and broadcasting scheme implementation in MBMS dedicated cell of LTE systems
CN100584098C (en) Exchange method for radio networking configuration information and radio network access device
CN101128011B (en) A method for automatic cell interference optimization
KR101581045B1 (en) FEMTO BASE STATION AND Dynamic Bandwidth Coordination METHOD
CN101370238B (en) MCCH transmitting/receiving method and device based on LTE
RU2008141085A (en) NETWORK DEVICE AND RADIO ACCESS METHOD
CN103748946A (en) Apparatus and method for scheduling a mobile terminal
CN102457918A (en) Method and device for determining target cell
CN101982991B (en) Heterogeneous service QoS based LTE network inter-cell interference ordination method
CN102118759A (en) Downlink transmission frequency division method for cooperating multipoint transmission system on the basis of service quality
CN103702430A (en) Method for multi-stage soft time-frequency multiplexing and resource allocation, equipment and a system
CN103703800B (en) Cell interoperation treating method and apparatus
CN102165803A (en) Wireless communication system, wireless communication device, and wireless resource management method
CN102668670A (en) Wireless communication system
CN103002462B (en) Two benches cooperation multicasting method and system
CN102231871A (en) Methods, systems and equipment for transmitting information and judging whether to receive multimedia broadcast multicast service (MBMS) or not
CN101925185A (en) Interference suppression method of relay cellular network, base station and network system
CN102301822A (en) Hybrid Duplexing Operation Method In Wireless Communication System, And Apparatus Thereof
CN102474897A (en) Base station and neighbor base station information transmission method
CN104333909A (en) Base station and load-based dynamic time-domain resource allocation method in heterogeneous network
CN109152048B (en) Space division multiplexing method, base station and computer readable storage medium
CN101888595B (en) Method for selecting and soft combining multi-cell signals in multicast broadcast single frequency network
Midya et al. QoS aware distributed dynamic channel allocation for V2V communication in TVWS spectrum

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant