CN102394716B - Cdma communication system - Google Patents
Cdma communication system Download PDFInfo
- Publication number
- CN102394716B CN102394716B CN201110241994.2A CN201110241994A CN102394716B CN 102394716 B CN102394716 B CN 102394716B CN 201110241994 A CN201110241994 A CN 201110241994A CN 102394716 B CN102394716 B CN 102394716B
- Authority
- CN
- China
- Prior art keywords
- code
- base station
- data
- spread
- multiplexing
- 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.)
- Expired - Lifetime
Links
Abstract
The invention discloses a kind of cdma communication system.In the cdma communication system of the present invention, the judging part (101) of communicator notifies the information for entering line code multiplexing to user data separating component (103) and proliferation part (105 1~105 n) when can ensure that multiple spread codes.User data separating component (103) is separated to user data and sends proliferation part (105 1~105 n) to.Proliferation part (105 1~105 n) is diffused using mutually different spread code to user data.Code multiplexing components (106) are multiplexed and sent to the user data spread by proliferation part (105 1~105 n).
Description
The application be for Application No. " 02828362.7 ", the applying date be on 2 28th, 2002, it is entitled " use
Divisional application (Application No. " 201010194176.7 ", entitled " wireless base station, the hair of communicator in CDMA "
Send control method and wireless base station apparatus ") divisional application again.
Technical field
The present invention relates to make use of the communicator used in CDMA GSM, more particularly to utilizing
Base station apparatus used in CDMA GSM.
Background technology
In recent years, as the next generation mobile communication system for realizing wireless multimedia communication, CDMA (Code are being studied
Division Multiple Access：CDMA) technology, especially with DS-CDMA (Direct Spread-
CDMA) the wireless communication system of the digital cellular shape of technology.
It is each channel or each user distribution symbol, each channel or each user point usually in cdma communication system
It is not identified reciprocally by the symbol.Therefore, in cdma communication system, multiple communications are realized simultaneously using same frequency.
But, if carrying out multiple communications simultaneously, the signal of each channel is interfered, therefore, and result is can be while lead to
The number of channel (channel capacity) of letter is limited.Herein, transmit power of the interference dependent on each signal between signal.Therefore, exist
When the communication quality of transmission line is good, reduce the interference between signal by reducing transmit power, and increase channel capacity.This
Outside, the technology is commonly referred to as transmit power control (TPC：Transmitting Power Control), also there is suppression to move
The effect of the consumption power of machine.
In addition, in recent years, studying following technology：Prepare Different Modulations in advance, adapted to according to communication environment
The modulation system that ground selection should actually be used between base station and moving machine.Hereinafter, the adaptation modulation system is illustrated.
In the adaptation modulation of cdma communication system, generally according to the communication matter of the transmission line between base station and moving machine
Measure (for example, signal is to noise power ratio, bit error rate etc.), adaptively change modulation system.As modulation system, for example, preparing
The 64QAM shown in 16QAM, Fig. 1 C shown in QPSK, Figure 1B as shown in Figure 1A.Herein, it is fixed on phase plane for QPSK
4 signaling points of justice, the data of 2 are sent in every 1 symbol.In addition, for 16QAM, 16 are defined on phase plane
Individual signaling point, the data of transmission 4 in every 1 symbol.In addition, for 64QAM, 64 signals are defined on phase plane
Point, the data of transmission 6 in every 1 symbol.Moreover, for example, when communication environment is bad, data are sent using QPSK,
When communication environment is good, data are sent using 16QAM or 64QAM.It is thereby achieved that effective data transfer.
Fig. 2 is the block diagram that can carry out adapting to the existing dispensing device of modulation.Herein, the dispensing device is to user data
Multiplexed and sent with control data.In addition, the dispensing device is that base station dress in mobile communication system is set
Put.
Data traffic monitoring parts 1 monitors the data rate for the user data that should be sent.Addressable part (CHCOD) 2 according to
Pre-determined coded system is encoded to transmitted user data.Variable bit rate control unit 3 once keeps number of users
According to regard to monitoring result of the one side with reference to data traffic monitoring parts 1, while exporting the user data with defined speed.Adapt to
Modulating part 4 is according to line quality information determining modulation mode.In addition, line quality information is represented between base station and moving machine
The state of circuit, for example, using signal to noise power ratio.
Proliferation part 10 modulates user data according to the modulation system determined by adaptation modulating part 4, and spreads the modulation
Data.Specifically, mapping means 11 configure user data in correspondence according to the modulation system determined by adaptation modulating part 4
Signaling point.Spread code generator 12 is generated to the user data (or receiving the moving machine of the user data) that should be sent point
The spread code matched somebody with somebody.Moreover, the spread code generated by spread code generator 12 is multiplied by mapping means 11 by diffuser 13
Output.
Proliferation part 20 spreads control data.In addition, the composition of proliferation part 20 is substantially identical with proliferation part 10.But
It is that the spread code pre-determined for control data is generated in proliferation part 20, is spread and controlled according to the spread code
Data.In addition, control data substantially will not be modulated adaptively.
Code multiplexing components 21 are multiplexed simultaneously to the output of proliferation part 10 and the output of proliferation part 20
Send.In addition, receive from the dispensing device send signal reception device (being moving machine herein) using with dispensing device
The middle spread code identical code playback user data used.
Below, the example for adapting to modulation action in above-mentioned dispensing device is simplyd illustrate.In addition, here, it is assumed that just
Modulated with QPSK and sending current-user data.Further, it is assumed that line quality is good.
In such a case it is possible to be selectively carrying out 3 following actions.
(1) modulation system is not changed, and reduces transmit power.
(2) while character rate is reduced to 1/2, modulation system is changed to 16QAM from QPSK.In the situation
Under, the digit of every 1 symbol is changed into 2 times, therefore data rate does not change.On the other hand, character rate is changed into 1/2, therefore, knot
Fruit is can to suppress the increase of transmit power to a certain extent.
(3) do not change character rate and modulation system is changed to 16QAM from QPSK.In this case, the position of every 1 symbol
Number becomes 2 times, therefore data rate becomes 2 times.But, transmit power becomes big.
In addition, in mobile communication system, it is general to require increase channel capacity and suppress the transmit power of communicator (especially
It will suppress the consumption power of moving machine), use the data rate high speed of user data.Moreover, these requirements pass through suitably
Selection above-mentioned (1)~(3) are implemented.
But, in the prior art, it is impossible to while meeting these requirements.I.e., if it is desired to by the bit error rate of data transfer
Remain certain value, then be necessary to make between signaling point of the configuration in the phase plane shown in Figure 1A~Fig. 1 C away from
From becoming steady state value.On the other hand, as well known, transmit power and the origin from phase plane coordinate are to corresponding
Signaling point distance it is square proportional.Therefore, if signaling point used in increase, inevitably enlarges transmit power.Example
Such as, if it is assumed that distance is identical between signaling point, then transmit power of the 16QAM transmit power relative to QPSK about increases 6dB,
Transmit power of the 64QAM transmit power relative to QPSK about increases 12dB.
So, in existing adaptation modulation technique, if it is desired to seek the high speed of data rate, then can cause transmission
Power or the increase for consuming power.Or, if wanting to keep certain quality under defined transmit power, tend not to
Seek the high speed of data rate.
The content of the invention
The purpose of the present invention be exactly in cdma communication system easily and evenly realize data rate high speed and
The suppression of transmit power.
The dispensing device of the present invention has：For in cdma communication system, modulating and spreading multiple modulation of user data
Disperser；Manage the managing device of spread code；Determined according to the behaviour in service of the spread code managed by above-mentioned managing device
Determine the determination device that code multiplexes number；And dress is spread by the modulation of number corresponding with above-mentioned code multiplexing number
Put the multiplex machine multiplexed to the user data modulated and spread.In addition, the dispensing device is, for example, honeybee
The base station apparatus of nest communication system.
If according to above-mentioned composition, when the spread code that can be distributed has residue, multiple expand can be distributed to 1 user
Code is dissipated, therefore user data can be effectively sent using code multiplexing.That is, the communication resource is efficiently utilized (herein,
It is spread code).
In addition, in above-mentioned dispensing device, also setting up the beam-forming arrangement that control sends the directionality of signal, above-mentioned pipe
Reason device manages spread code for each directionality beam generated by above-mentioned beam-forming arrangement, above-mentioned determination device according to
The behaviour in service of the spread code managed for each directionality beam determines code multiplexing number.If according to the structure
Into then adding can be while the number of the moving machine communicated in communication zone.
The dispensing device of the other forms of the present invention has：For in cdma communication system, managing the management of spread code
Device；Determined to multiplex or carry out into line code according to the behaviour in service of the spread code managed by above-mentioned managing device
Adapt to the determination device of modulation；And according to the decision of above-mentioned determination device, handle and export the modulation diffusion dress of user data
Put.
If according to above-mentioned composition, when the spread code that can be distributed has residue, using code multiplexing effectively
User data is sent, when spread code is without residue, with optimal modulation system in the communication that make use of 1 spread code
Send user data.
Brief description of the drawings
Figure 1A, Figure 1B, Fig. 1 C are the figures of the configuration for the signaling point for representing QPSK, 16QAM, 64QAM respectively.
Fig. 2 is the block diagram that can carry out adapting to the existing dispensing device of modulation.
Fig. 3 is the figure for the GSM for representing related embodiment of the invention.
Fig. 4 is the block diagram for the function of representing base station.
Fig. 5 is the figure for the form for schematically representing the data from the base station transmission shown in Fig. 4.
Fig. 6 and Fig. 7 are the figures for illustrating the code multiplexing in embodiment.
Fig. 8 is the flow chart for the action for representing the base station shown in Fig. 4.
Fig. 9 A are the embodiments that spread code manages part.
Fig. 9 B are the examples of the composition of spread code.
Figure 10 is to judge whether to code multichannel according to data rate, the behaviour in service of spread code and line quality
The flow chart of the processing of multiplexing.
Figure 11 is the figure for illustrating to communicate between base station and moving machine.
Figure 12 is the block diagram for the moving machine for receiving the signal sent from the base station shown in Fig. 4.
Figure 13 is the pie graph of the base station of embodiments of the invention 2.
Figure 14 is the flow chart of the action for the base station for representing embodiment 2.
Figure 15 is the pie graph of the base station of embodiments of the invention 3.
Figure 16 is the flow chart of the action for the base station for representing embodiment 3.
Figure 17 is the pie graph of the base station of embodiments of the invention 4.
Figure 18 is the figure for representing to adapt to the directionality beam of array.
Figure 19 is the embodiment that the spread code for managing spread code for each beam manages part.
Figure 20 is the pie graph of the base station of embodiments of the invention 5.
Figure 21 is the pie graph of the base station of embodiments of the invention 6.
Embodiment
Below, while 1 side illustrates embodiments of the invention referring to the drawings.
Fig. 3 is the figure for the GSM for representing related embodiment of the invention.In figure 3, base station 30 possess with
Moving machine (MS in communication zone：Mobile Station) function of receiving wireless signal is sent between 40.On the other hand, respectively
Moving machine 40 possesses the function of being sent between base station 30 and receive wireless signal.Moreover, moving machine 40 is filled with other terminals
Put when being communicated, via the transmitting and receiving data of base station 30.
Above-mentioned communication system is cdma communication system.Herein, in cdma communication system, typically to each channel or each
User's distribution symbol (spread code), each channel or each user are reciprocally identified by the spread code respectively.But, in reality
In the system for applying example, often adaptively multiple spread codes are distributed to 1 user according to communication environment.In addition, also according to communication
Environment adaptively selects the modulation system of the signal transmitted between base station 30 and moving machine 40.
Base station 30 possesses spread code management part 31, manages the diffusion generation of the defined amount used in communication zone
Code.That is, spread code management part 31 manages the spread code of the distribution of moving machine 40 to communication in communication zone.Therefore,
Spread code management part 31 grasps the spread code of unused state in the spread code of pre-prepd defined amount
Number.
In addition, base station 30, which possesses quality, speculates part 32, the circuit between detection or supposition base station 30 and each moving machine 40
Quality.That is, quality speculates that part 32 receives the signal come from the transmission of each moving machine 40, for each mobile machine testing or supposition
Signal is to noise power ratio (SIR), the bit error rate, receiving power etc..In addition, detection or speculate signal to noise power ratio (SIR),
The method of the bit error rate, receiving power etc. is widely-known technique.
On the other hand, each moving machine 40 possesses quality in order to speculate the quality of the circuit between base station 30, respectively and pushed away
Survey part 41.Quality speculates that part 41 is received from base station 30 and transmits the signal of coming, and detection or supposition signal are to noise power ratio
(SIR), the bit error rate, receiving power etc..In addition, speculating that the line quality information that part 41 is detected or speculated is notified to by quality
Base station 30.
Then, the dispensing device of embodiment is illustrated.In addition, following, illustrate in the system as shown in fig. 3 from base station 30 to right
The moving machine 40 answered sends the situation of data.I.e., it is assumed that the dispensing device of embodiment is the base station 30 shown in Fig. 3.But, this hair
It is bright to be not limited to this, it can be also applicable in the case where sending data from moving machine 40 to base station 30.
Fig. 4 is the block diagram for the function of representing base station 30.In addition, in Fig. 4, merely illustrating work(directly related to the present invention
Energy.
Base station 30 possesses transmission part (MOD) 100 and receiving part (DEM) 200.Herein, send part 100 and possess modulation
These data are multiplexed and sent by the control data and user data sent with diffusion to corresponding moving machine 40
Function.In addition, receiving part 200 possesses the function that simultaneously replay data is demodulated to the signal received from moving machine 40.
Data traffic monitoring parts 1 monitors the data rate for the user data that should be sent to corresponding moving machine.Coding unit
Part (CHCOD) 2 is encoded according to pre-determined coded system to transmitted user data.Judging part 101 is according to number
According to rate information, number of users information and line quality information, judge whether that line code multiplexing should be entered.In addition, passing through number
Data-rate information is detected according to traffic monitor part 1.In addition, number of users information is the use for representing to be communicated in communication network
The information of the number at family, or represent to any moving machine 40 distribution untapped spread code number information,
And paid from the spread code management part 31 shown in Fig. 3.In addition, speculating part 41 by the quality of corresponding moving machine 40
Detection speculates line quality information, and is received via receiving part 200.
Variable bit rate control unit 102 once keeps user data, just according to the instruction from judging part 101, to advise
Fixed speed exports the user data.User data separating component 103, will be from variable according to the instruction from judging part 101
The user data that rate control section 102 is exported distributes to one or more proliferation parts 105-1~105-n.Adapt to modulating part
104 according to the instruction from judging part 101, data-rate information and line quality information, determining modulation mode.In addition,
On data-rate information and line quality information as described above.
Proliferation part 105-1~105-n possesses mapping means 11, spread code generator 12 and diffuser 13 respectively,
The user data given is modulated and spread.That is, mapping means 11 are according to the modulation determined by adaptation modulating part 104
Mode configures user data in corresponding signaling point.The generation of spread code generator 12 is assigned to corresponding channel or user
Spread code.Then, diffuser 13 is by the output of the spread code generated by spread code generator 12 and mapping means 11
It is multiplied.In addition, proliferation part 105-1~105-n uses mutually different spread code diffusion user data.
Proliferation part 20 is as reference picture 2 illustrates, using pre-determined spread code paired domination number according to being expanded
Dissipate.Then, code multiplexing components 106 are carried out to proliferation part 105-1~105-n output and the output of proliferation part 20
Multiplex and send.In addition, moving machine 40 uses the spread code identical code with being used in base station 30, playback user
Data and control data.
Receiving part 200 possesses demodulating part 201 and extracts part 202 out.Herein, demodulating part 201 is demodulated from moving machine
40 signals sent and replay data.Extracted out in addition, extracting part 202 out from the data reset by demodulating part 201 in movement
The line quality information obtained in machine 40.Then, the line quality information is sent to judging part 101 and adapts to modulating part
104。
Fig. 5 is the figure for the form for schematically representing the data from the transmission of base station 30 shown in Fig. 4.Herein, user is shown
Data are separated into the state that 3 data are arranged by user data separating component 103.
Control data includes the control for the pilot signal of channel supposition etc. and for various controls such as transmit power controls
Position processed.Moreover, the control data is modulated and spread by proliferation part 20.Herein, modulation system is QPSK.In addition, expanding
In separate component 20, in order to spread control data, " the spread code 0 " regularly determined in advance is used.
On the other hand, user data (the 3 data row exported from user data separating component 103) passes through proliferation part
Any 3 proliferation parts in 105-1~105-n are modulated and spread respectively.At this moment, to be specified by adaptation modulating part 104
Modulation system (QPSK, 8PSK, 16QAM, 64QAM etc.) modulate each user data.In addition, using the diffusion generation dynamically distributed
Code (is herein, that spread code 1~3) spreads each user data.
Then, these data via the control channel, subscriber channel 1~3 recognized by spread code to corresponding movement
Machine 40 is sent.
Then, one side reference picture 6 and Fig. 7, while the code multiplexing action of explanation base station 30.Herein, Fig. 6 is represented
The data flow in the case of line code multiplexing is not entered, Fig. 7 represents the data in the case where entering line code multiplexing
Stream.In addition, in the figure 7, describing the situation for entering line code multiplexing using 3 spread codes.
Do not enter line code multiplexing in the case of, user data as shown in Figure 6 not be separated and same as before
Sent to proliferation part 105-1.Then, the user data is modulated in mapping means 11, and diffusion is used in diffuser 13
Code 1 is spread.Herein, if it is assumed that modulation system is QPSK, then every 2 ground of user data is configured in corresponding signal
Point.That is, every 1 symbol sends 2 data.
On the other hand, in the case where entering line code multiplexing, user data passes through user data as shown in Figure 7
Separating component 103 is separated into 3 data row, and is sent to proliferation part 105-1~105-3.Then, each data row exist respectively
Modulated, spread in corresponding diffuser 13 in corresponding mapping means 11.At this moment, used in proliferation part 105-1
" spread code 1 " uses " spread code 2 ", the use " spread code in proliferation part 105-3 in proliferation part 105-2
3”.Therefore, if it is assumed that modulation system is QPSK, then in each proliferation part 105-1~105-3, every 1 symbol sends 2 respectively
The data of position.That is, if entering line code using 3 spread codes to multiplex, it will send total in 1 symbol time
The data of 6.In other words, if it is assumed that modulation system and diffusivity (segments of every 1 symbol) are identical, and using n spread
Code enters line code multiplexing, then is compared with not entering the situation of line code multiplexing, the number for sending user data
Become n times according to speed.
So, if entering line code multiplexing, the data rate that can be used in transmission user data becomes at a high speed.
Then, illustrate that by entering line code multiplexing transmit power this point can be suppressed.Herein, it is in data rate
Under the same conditions, compare into the situation of line code multiplexing and without situation about carrying out.Moreover, as an example, it is false
The situation of the data of 6 is sent during being scheduled on 1 symbol.
(1) situation about being multiplexed without code
In order to be multiplexed without code and the data of every 1 symbol transmission 6, for example, typically it is contemplated that 64QAM.
64QAM is as shown in Figure 1 C like that using 64 signaling points on phase plane.Here, it is assumed that 64 signaling points are centered on origin
It is configured, it is assumed that the minimum range between signaling point is " 2 ", then each signaling point will be configured to (+1 ,+1) (- 1 ,+1)
(1-, -1) (+1, -1) ... (+7 ,+7) (- 7 ,+7) (- 7, -7) (+7, -7).In addition, sending signal using some signaling point
In the case of, the transmit power is equivalent to from origin to square of the distance of the signaling point.Therefore 64QAM average transmitting power is such as
Calculated like that below.
Mean power={ 4 × (12+12)+8×(12+32)+8×(12+52)+8×(12+72)+8×(32+52)+8×(32+
72)+8×(52+72)+4×(32+32)+4×(52+52)+4×(72+72)/64=42
In this case, mean amplitude of tide becomes 6.48.
(2) situation of line code multiplexing is entered
Here, it is assumed that passing through the data of the middle transmission 6 during 1 symbol of the method shown in Fig. 7.I.e., it is assumed that user data
Every 2 modulated respectively with QPSK in proliferation part 105-1~105-3, their quilts in code multiplexing components 106
Multiplexing.
It is assumed that in QPSK, signaling point is configured centered on origin, and assumes that the minimum range between signal is " 2 ",
Then signaling point is configured to (+1 ,+1) (- 1 ,+1) (- 1, -1) (+1, -1) as shown in fig. ia.In addition, if in diffusion part
The 3 QPSK signals modulated in part 105-1~105-3 are multiplexed, then pass through the I compositions and Q compositions point of 3 QPSK signals
Not carry out add operation obtain the I compositions and Q compositions of the multiplex signal.For example, by proliferation part 105-1~105-3
In the case that the I compositions and Q compositions of 3 QPSK signals of generation are entirely (+1 ,+1), the signaling point of multiplex signal becomes
(- 3, -3).In addition, 3 QPSK signals I compositions and Q compositions be respectively (- 1, -1), (+1, -1), (+1 ,+1) situation
Under, the signaling point of multiplex signal becomes (+1, -1).Moreover, so, for whole combinations will by (+1 ,+
1) configured on 16 signaling points that (- 1 ,+1) (1-, -1) (+1, -1) ... (+3 ,+3) (- 3 ,+3) (- 3, -3) (+3, -3) are constituted
Calculate the multiplex signal of addition value.That is, obtain configuring with the 16QAM identicals signaling point shown in Figure 1B.Therefore, should
The mean power of multiplex signal is calculated as described below.
Mean power={ 4 × (12+12)+8×(12+32)+4×(32+32)/16=10
In this case, mean amplitude of tide becomes 3.16.
If understood according to above-mentioned (1) and (2), it is assumed that data rate is identical, and assume to multiplex transmission using code
Data, then compared with the situation for not utilizing code to multiplex, can significantly suppress transmit power.That is, by using generation
Code multiplexing, can reduce consumption power.In above-mentioned example, if carrying out the transmission of code more than 3, compared with 64QAM,
Even if transmit power is reduced into 6dB, the equal bit error rate as a result can be also obtained.
So, multiplexed by entering line code, realize the high speed of data rate and/or consume the reduction of power.
For example it is assumed that in the existing dispensing device multiplexed without code, the nothing if without using 64QAM is have issued from user
The requirement of the such High Speed Transfer of method transmission.In this case, if it is assumed that be not being met with 64QAM desired Eb/No that
The electric-field intensity of sample, then necessarily carry out data transmission with the data rate lower than the requirement from user, or without data
Transmission.On the other hand, multiplexed because the dispensing device of embodiment enters line code using multiple spread codes, even therefore
With existing dispensing device identical power, because the bit error rate has been enhanced 3dB or so, therefore, it is possible to meet desired Eb/No.
That is, it disclosure satisfy that the requirement of High Speed Transfer.
But, multiplexed by code, can also use multiple spread codes simultaneously in 1 user data certainly.
That is, it is inevitable remaining without using multiple spread codes in communication zone in the case where entering line code multiplexing.Therefore,
The base station of embodiment adaptively or dynamically judges whether to code multichannel according to the remaining number of untapped spread code
Multiplexing.Hereinafter, while with reference to flow chart while explanation is comprising whether the data for the judgement processing for entering line code multiplexing are sent
Processing.
Fig. 8 is the flow chart for the action for representing the base station shown in Fig. 4.In addition, the flow chart, which is merely illustrated, is related to data hair
The processing sent.In addition, main perform following processing by judging part 101 and adaptation modulating part 104.
In step sl, (or come from according to the data rate of the user data detected by data traffic monitoring parts 1
The requirement transfer rate of user), calculate and send parameter.Herein, as parameter is sent, the parameter of pertinent code multiplexing is calculated
With the parameter about modulation system.
The parameter multiplexed as pertinent code, calculates many code numbers and symbol rate.In addition, " many code numbers " is same
When the number of spread code that uses.On the other hand, " symbol rate " is the symbol that each spread code is transmitted in time per unit
Number.Herein, the symbol rate is if it is assumed that segmentation speed is certain, then diffusivity (SF) is uniquely determined.Therefore, make
The parameter multiplexed for pertinent code, can calculate many code numbers and diffusivity.
Determine to be related to the parameter of code multiplexing so that meeting the data rate of user's requirement.Specifically, select full
It is enough the parameter of lower condition.
It is required that data rate≤(digit of each symbol) × (symbol rate) × (many code numbers)
Herein, if it is assumed that QPSK is used in proliferation part 105-1~105-n when entering line code multiplexing, then
It is " digit=2 " of each symbol.In addition, if the maximum for assuming the spread code that can be distributed to each user is " n (n：From
So count) ", then " 1 "~" n " may be selected as " many code numbers ".But, " many code number=1 " mean not enter line code many
Road is multiplexed.Moreover, " character rate " uses some diffusivity with being properly selected out from pre-determined multiple diffusivitys
Corresponding value.
Then, select to meet the combination of " symbol rate " and " many code numbers " of above-mentioned condition as candidate parameter.In addition,
In the case of existing multiple candidate parameters, it is assumed that " many code numbers " bigger parameter relative importance value is higher.
On the other hand, as the parameter about modulation system, multivalue number and symbol rate are calculated.In addition, " multivalue number " is general
Mean to be configured in the number of the signaling point on phase plane, but here, it is meant that " digit of each symbol ".That is, example
It is " 2 " such as to assume QPSK, and 8PSK is " 3 ", and 16QAM is " 4 ", and 64QAM is " 6 ".
The parameter of following condition is met as the parameter selection about modulation system.
It is required that data rate≤(multivalue number) × (symbol rate)
Then, select to meet the combination of " the multivalue number " and " symbol rate " of above-mentioned condition as candidate parameter.Furthermore, it is assumed that
In the case of multiple candidate parameters, " multivalue number " bigger parameter relative importance value is higher.
So, in step sl, the candidate of the transmission parameter of selection pertinent code multiplexing and relevant modulation respectively
The candidate of the transmission parameter of mode.
In step s 2, part 31 is managed by the spread code shown in Fig. 3, retrieves untapped spread code.In addition,
Spread code management part 31 as shown in Figure 9 A, for the spread code of pre-prepd regulation number, manages its each
Use state (use/be not used).In addition, representing diffusion generation with such tree structure (or hierarchy) shown in Fig. 9 B
Code.In this embodiment, 256 spread codes have been prepared.
In step S3~S6, whether investigation can enter line code multiplexing.Specifically, to obtaining in step sl
" many code numbers " and " number for the spread code that can be used " that detects in step s 2 be compared.At this moment, if " energy
The number of the spread code used " is more than or equal to " many code numbers ", then it is assumed that can carry out corresponding code multiplexing, and preceding
Enter step S21.Then, in step S21, corresponding subscriber channel is distributed.In addition, multiple candidates ought have selected in step sl
In the case of, maximum " many code numbers " is selected in the range of " number for the spread code that can be used " is not above.
In the case where judging that line code multiplexing can not be entered (for example, be layered utilizing in the system of orthogonal code,
When having used upper code etc.), determine optimal modulation system in step S11~S16.At this moment, investigation base station 30 and correspondingly
Moving machine 40 between line quality, and determine under such communication environment available modulation system.Then, if
In the case of there are multiple available modulation systems, relative importance value highest modulation system is just selected.In addition, in the present embodiment,
Speculate that part 41 receives the information of expression line quality from the quality of corresponding moving machine 40 in step s 12.
In the case of being judged as under detected communication environment without workable modulation system, it is believed that can not
Distribute for transmitting the subscriber channel of the user data received, and in step S22, the information is notified into user.
In addition, carrying out following processing in step S21 channel distribution.
(1) situation of line code multiplexing is entered
Judging part 101 is notified " many code numbers " to user data separating component 103.At this moment, for example, if " many generations
Yardage=3 ", then user data separating component 103 user data received is separated into 3 data row as shown in Figure 7.
Then, proliferation part 105-1~105-3 is given by 3 data biographies.
In addition, adapt to modulating part 104 notifies " modulation system to proliferation part 105-1~105-n：QPSK”.Therefore, expand
Separate component 105-1~105-n modulates user data with QPSK respectively.
In addition, judging part 101 notifies mutually different expansion to proliferation part 105-1~105-n of processes user data
Dissipate code.Herein, part 31 is for example managed by spread code and distributes these spread codes.Then, it is assigned with spread code
Proliferation part 105-1~105-n spreads user data using the code respectively.
So, user data is modulated with QPSK respectively in multiple proliferation part 105-1~105-n, is reused mutually
After different spread codes is spread, it is multiplexed.
(2) situation about being multiplexed without code
Judging part 101 notifies " many code number=1 " to user data separating component 103.In this case, user data
Separating component 103 sends the user data received to proliferation part 105-1 same as before.
Adapt to modulating part 104 will according to line quality adaptively determined modulation system (QPSK, 8PSK, 16QAM,
64QAM etc.) notify proliferation part 105-1.Then, the modulation system modulation user data that proliferation part 105-1 is notified.
So, in the data of the flow chart shown in Fig. 8 are sent, according to the behaviour in service of spread code (or in communication
The user's number communicated in region) judge whether that line code multiplexing can be entered, and according to line quality determining modulation
Mode.So, due to sending user data with appropriate method corresponding with communication environment, it is achieved that the height of data rate
The reduction of speed and/or consumption power.But, the present invention is not only limited in this, can also according to the behaviour in service of spread code and
The both sides of line quality judge whether to code multiplexing.
Figure 10 is to judge whether to code multichannel according to data rate, the behaviour in service of spread code and line quality
The flow chart of the processing of multiplexing.
In step S31, the data rate of user data is detected.In step s 32, the use shape of spread code is detected
Condition.In step S33, the state of circuit is detected.Then, in step S34, determine whether to multiplex into line code.Specifically
Ground says, for example, first, " many code numbers " as calculating the data rate for meeting user's requirement and " symbol rate (or, spread
Rate) ".Then, untapped spread code is searched for, and investigates whether the spread code of the number calculated can be distributed.In addition,
Considering the state of circuit, with " many code numbers " calculated and in the case that " symbol rate " carries out data transmission, investigate whether
It can ensure that defined quality.The result is that it is remaining it is necessary can distribution spread code, and judge to can ensure that regulation
Quality in the case of, in step s 35, be used for the setting multiplexed into line code.
On the other hand, in the case where being multiplexed without code, the determining modulation mode in step S36, and in step
Corresponding notice is carried out in rapid S37.
In addition, in the above-described embodiment, it is assumed that in the case where entering line code multiplexing, in proliferation part 105-
User data is modulated with QPSK in 1~105-n, but the present invention is not limited thereto.That is, even entering the feelings of line code multiplexing
Condition, with the mode beyond QPSK can also modulate user data in proliferation part 105-1~105-n.
As described above, base station 30 adaptively changes the sending method of data according to communication environment etc..At this moment, the hair of data
The change for sending mode as shown in Figure 11, is notified to corresponding moving machine 40.That is, if base station 30 determines sender
Formula, then notify parameter (many code numbers, spread code, modulation system etc.) correspondingly to moving machine 40.Moving machine 40 judges
Whether the signal that sends can be received with the sending method that is notified from base station 30, and to its result of the response of base station 30.Then, when in shifting
In the case of data being received in motivation 40, the change of base station 30 sending method.On the other hand, the change of moving machine 40 reception mode.
So, the change of the sending method of data is carried out by the communication between base station 30 and moving machine 40.
Figure 12 is the block diagram for the moving machine for receiving the signal sent from the base station shown in Fig. 4.In addition, merely illustrate herein
It is directly related to the major part of data receiver function.
The signal sent from base station 30 is received via antenna, and is sent to counter diffusion part 501-1~501-n, 502.
Herein, counter diffusion part 501-1~501-n docking collections of letters number are diffused and demodulated.On the other hand, 502 pairs of counter diffusion part
The progress counter diffusion of reception signal and demodulation, which are laid equal stress on, puts control data.
Counter diffusion part 501-1~501-n, 502 composition are substantially the same.That is, spread code generator 511 generates pre-
The spread code first determined or the spread code distributed by base station 30.Diffuser 512 will be generated by spread code generator 511
Spread code is with receiving signal multiplication.513 pairs of demodulating part is demodulated by the signal of counter diffusion.In addition, synthesizer 503 is synthesized
Demodulated signal from counter diffusion part 501-1~501-n.Then output of the recombiner 504 to synthesizer 503 be combined simultaneously
Exported as user data.On the other hand, the demodulating data of counter diffusion part 502 is exported as control data.
In above-mentioned moving machine, the demodulation mode of demodulating part 513 is according to the instruction from base station 30.In addition, using k
In the case that individual spread code enters line code multiplexing, 503 pairs of solutions from counter diffusion part 501-1~501-k of synthesizer
Signal is adjusted to be synthesized and reset user data.
Then, other embodiments of the invention (2~embodiment of embodiment 6) are illustrated.
Figure 13 is the pie graph of the base station of embodiments of the invention 2.In the base station of embodiment 2, in a base station detection or
Speculate the quality of the circuit between moving machine 40.That is, the receiving part (DEM) 200 of the base station possesses detection or speculated with moving
The line quality of the quality of circuit between motivation 40 speculates part 203.Herein, line quality speculates that part 203 is received from right
The signal that the transmission of moving machine 40 answered comes, and detect or speculate signal to noise power ratio (SIR), the bit error rate, receiving power etc..
In addition, detection or supposition signal are widely-known techniques to the method for noise power ratio (SIR), the bit error rate, receiving power etc..
In addition, sending the action of part (MOD) 100 substantially as reference picture 4 is illustrated.Namely it is decided that part 101
Speculate that the line quality that part 203 is detected or deduced determines whether to multiplex into line code according to by line quality, adapt to
Modulating part 104 is according to the line quality determining modulation mode.
Figure 14 is the flow chart of the action for the base station for representing embodiment 2.By the way that the step S12 shown in Fig. 8 is replaced as into step
Rapid S41 and the action for realizing the base station of embodiment 2.That is, in the flow chart shown in Fig. 8, line is received from corresponding moving machine 40
Road quality information, but in example 2, detected by the base station or speculate line quality information.
Figure 15 is the pie graph of the base station of embodiments of the invention 3.In the base station of embodiment 3, it is considered in the moving machine
The value detected in 40 and the both sides of the value detected in the base station and the quality for speculating the circuit between moving machine 40.
That is, the receiving part (DEM) 200 of the base station possesses the above-mentioned both sides for extracting part 202 and line quality supposition part 203 out.
Moreover, a side poor in the average value of these values or these values is sent to judging part 101 as line quality information
With adaptation modulating part 104.
In addition, transmitting the quality of the downgoing line of signal from base station 30 to moving machine 40 and from moving machine 40 to base station 30
The quality for transmitting the uplink of signal is general mutually identical.But, it is mutual in the carrier frequency of uplink and downgoing line
In the case of being very different, generally, the quality of uplink and the quality of downgoing line will be mutually different.If moreover,
According to the base station of embodiment 3, even the then quality of uplink and the mutually different situation of the quality of downgoing line, it is considered to it
Both sides can also select optimal data transmission method for uplink.
Figure 16 is the flow chart of the action for the base station for representing embodiment 3.By inserting step after the step S12 shown in Fig. 8
Rapid S41 and S42 realizes the action of the base station of embodiment 3.That is, in step S42, according to the circuit detected by moving machine 40
Quality and the line quality detected by the base station, obtain average quality and worst quality.Then, in step s 13, according to
Whether the modulation system that the Quality estimation obtained in step S42 is wished to carry out is appropriate.
Figure 17 is the pie graph of the base station of embodiments of the invention 4.The base station of embodiment 4 is in addition to the composition shown in Fig. 4
It is also equipped with beam-forming arrangement 111 and adapts to array antenna 112, user's separation can be carried out in communication zone.That is, the base station
As shown in Figure 18, the beam with directionality can be utilized to send wireless signal.At this moment, if between beam mutually
There is no overlapping, or if overlapping few between beam, then the user in communication network is mutually divided by each beam
From.That is, even same spread code is assigned to the situation of multiple users, if they are located in mutually different beam,
Then base station 30 also can reciprocally recognize these users.But, it is impermissible for distributing to same spread code in 1 beam
Multiple users.
Therefore, the base station of embodiment 4 for each beam manage spread code behaviour in service or user's number, and according to
It determine whether line code multiplexing can be entered.Therefore, spread code management part 31 is as shown in Figure 19 for each
Beam manages the allocation situation of spread code.In addition, the correspondence for managing each moving machine and beam by widely-known technique is closed
System.
Moreover, in the base station of embodiment 4, judging part 101 judges in data transmission is carried out to some moving machine 40
When whether entering line code multiplexing, investigated and penetrated corresponding with the position of the moving machine 40 by spread code management part 31
The number for the spread code that Shu Zhongneng is used.Then, it can ensure that the diffusion generation of the number into necessary to line code multiplexing
During code, judging part 101 will notify to user data separating component 103 for entering the parameter of line code multiplexing, adapt to adjust
Part 104 and proliferation part 105-1~105-n processed.Hereby it is achieved that many code transmission.
Figure 20 is the pie graph of the base station of embodiments of the invention 5.The base station of embodiment 5 is embodiment 4 and embodiment 2
Combination.That is, the base station of embodiment 5 possesses function (the line quality estimating unit of the quality of the circuit between detection and moving machine 40
Part 203), separate by adapting to array the function (beam-forming arrangement 111, adapt to array antenna 112) of user.
Figure 21 is the pie graph of the base station of embodiments of the invention 6.The base station of embodiment 6 is embodiment 4 and embodiment 3
Combination.That is, the function that the base station of embodiment 6 possesses the quality of the circuit between detection and moving machine 40 (extracts part 202, line out
Road quality speculates part 203), the function that separates by adapting to array user (beam-forming arrangement 111, adapt to array antenna
112)。
In addition, spread code is the limited communication resource, it is necessary to utilize effectively and liberally.It therefore, it can logical
In the case of believing that the number for the user that communication is required in region is more, constrained code multiplexing.For example, in the diffusion generation that can be used
Code is without in remaining situation, in the case where new user requires that communication starts, the number that base station can multiplex code
It is changed to send using the data of 1 spread code according to sending.In this case, the spread code that can be used can be distributed to
Above-mentioned new user.
In addition, in the above-described embodiment, illustrate that the data from base station to moving machine are sent, but the present invention is not limited to
This.That is, the present invention can be also applicable in the data from moving machine to base station are sent.But, in this case, it is necessary to will be relevant
The information of the behaviour in service of spread code is notified to moving machine from base station.
In addition, in the above-described embodiment, multiple proliferation part 105-1~105- are provided with to enter line code multiplexing
N, but the present invention is not limited thereto.That is, by repeating the spread code of change regulation number by 1 proliferation part, repeat simultaneously
Processing is diffused to user data, to realize that the diffusion with multiple proliferation part 105-1~105-n acts equal action.
Claims (2)
1. a kind of cdma communication system, with wireless base station and movement station, wherein,
The wireless base station includes receiving part and sends part,
The receiving part includes demodulating part, extracts part out and line quality supposition part, and the receiving part is taken out by described
Go out part and receive the line quality information detected by the movement station, speculate component retrieval by described by the line quality
Wireless base station setting-out line road quality information, calculates a side poor in these line quality informations as line quality,
The transmission part
Data rate as requested, calculates the parameter and the parameter about modulation system of pertinent code multiplexing, described relevant
The parameter of code multiplexing includes many code numbers and symbol rate, and the parameter about modulation system includes multivalue number and symbol
Rate,
Selection is multiple to be met
It is required that digit × symbol rate × many codes number of data rate≤each symbol
Many code numbers and symbol rate the candidate parameter that is multiplexed as pertinent code of combination,
And select multiple satisfactions
It is required that data rate≤multivalue number × symbol rate
Multivalue number and symbol rate combination as the candidate parameter about modulation system,
Data rate, the behaviour in service of spread code and the line quality as requested, judge whether to code multichannel
Multiplexing, many code numbers for requiring data rate are met being judged as to distribute according to untapped spread code
Spread code and it is judged as when entering line number with the combination for meeting many code numbers and symbol rate for requiring data rate
In the case of the line quality is able to ensure that when sending, it is judged as multiplexing into line code,
When being judged as being multiplexed, in the candidate parameter multiplexed from pertinent code, no more than the expansion that can be used
In the range of the number for dissipating code, selection is carried out with maximum many code numbers of many code numbers and the combination of symbol rate
Code is multiplexed,
When being judged as multiplexing without code, according to the line quality, join from the candidate about modulation system
The maximum modulation system of the multivalue number is selected to be modulated in number, and
Data are sent to the movement station.
2. cdma communication system according to claim 1, wherein,
The transmission notice of the part based on the quality of reception from the movement station, increases the code number of multiplexing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110241994.2A CN102394716B (en) | 2002-02-28 | 2002-02-28 | Cdma communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110241994.2A CN102394716B (en) | 2002-02-28 | 2002-02-28 | Cdma communication system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN028283627A Division CN1623290B (en) | 2002-02-28 | 2002-02-28 | Communication device used in CDMA |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102394716A CN102394716A (en) | 2012-03-28 |
| CN102394716B true CN102394716B (en) | 2017-07-21 |
Family
ID=45861927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110241994.2A Expired - Lifetime CN102394716B (en) | 2002-02-28 | 2002-02-28 | Cdma communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102394716B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1071223A2 (en) * | 1999-07-19 | 2001-01-24 | YRP Mobile Telecommunications Key Technology Research Laboratories Co., Ltd. | CDMA base station apparatus, and CDMA mobile communication system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08163085A (en) * | 1994-12-02 | 1996-06-21 | Toshiba Corp | Information communication equipment |
| JPH11298369A (en) * | 1998-04-10 | 1999-10-29 | Kokusai Electric Co Ltd | Multi-code adaptive modulation method and transmitter-receiver |
-
2002
- 2002-02-28 CN CN201110241994.2A patent/CN102394716B/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1071223A2 (en) * | 1999-07-19 | 2001-01-24 | YRP Mobile Telecommunications Key Technology Research Laboratories Co., Ltd. | CDMA base station apparatus, and CDMA mobile communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102394716A (en) | 2012-03-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5819086B2 (en) | Apparatus and method for controlling transmission of communication system | |
| CN1623290B (en) | Communication device used in CDMA | |
| KR100493091B1 (en) | Apparatus and method for distributing power in an hsdpa system | |
| EP1447938A2 (en) | Scheduling apparatus and method in a CDMA mobile communication system | |
| WO2004062311A1 (en) | Base station device and communication terminal device | |
| US20050105483A1 (en) | Base station apparatus and communication terminal apparatus | |
| US20040235501A1 (en) | Radio device and base station device | |
| US7336637B2 (en) | CDMA communication device for improving the usability of frequencies and suppressing the occurrence of call loss | |
| CN102802264B (en) | Fractional frequency reuse type resource allocating method and device | |
| KR20060073641A (en) | Code tree fragmentation in call admission control | |
| JP3144780B2 (en) | Spread spectrum modulation multiplex transmission equipment | |
| CN102394716B (en) | Cdma communication system | |
| KR100794978B1 (en) | Equalizing signal-to-interference ratios of different physical channels supporting a coded composite transport channel | |
| US20050117548A1 (en) | Nonblocking ovsf codes for 3g wireless and beyond systems | |
| CN101860409B (en) | Wireless base station, transmission control method and wireless transmitting device | |
| JP2004032210A (en) | Base station unit and method for controlling line connection | |
| CN107979874B (en) | Data scheduling method, device and base station for satellite communication system | |
| JP2008017521A (en) | Radio base station used in cdma communication, and transmission control method | |
| KR20090077821A (en) | Methods and apparatus for determining, communicating and using information which can be used for interference control purposes | |
| KR100407337B1 (en) | Method and apparatus for allocating the power gains of reverse power control channels in mobile communication system | |
| CN106856423A (en) | The acquisition methods and device of a kind of terminal carrier polymerization frequency number and up MCS grades | |
| MXPA98008390A (en) | Dynamic and intelligent dispersion for multiple access by division of amp band code |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20170721 |