CN1383335A - System and method for transmitting data in reverse chain channel - Google Patents
System and method for transmitting data in reverse chain channel Download PDFInfo
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- CN1383335A CN1383335A CN 02118077 CN02118077A CN1383335A CN 1383335 A CN1383335 A CN 1383335A CN 02118077 CN02118077 CN 02118077 CN 02118077 A CN02118077 A CN 02118077A CN 1383335 A CN1383335 A CN 1383335A
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Abstract
A system and method for transmitting data on a reverse link channel are disclosed. For effective use of wireless channels and allowing high-speed data transfers on the reverse link in a mobile communications system, the modulation mode and/or the coding rate can be adaptively adjusted according to changes in the wireless channel conditions. To estimate the channel conditions, the mobile station transmits an access signal via an access channel to the base station. The base station determines a first data transmission rate based upon the signal power level value of the access signal and an actual signal power level detected from the access channel, and also determines a second data transmission rate based upon a signal load detected at the base station. The base station selects the appropriate data transmission rate, and applies an adjusted modulation mode and/or channel coding. A plurality of mobile stations can be handled by assigning priority levels to the mobile stations. By limiting the reverse link data transmission time period, many mobile stations can be handled for transmitting large amounts of data.
Description
Invention field
The present invention relates generally to mobile communication, particularly estimate the situation of reverse chain channel, with at the reverse chain channel transmitting data.
Background technology
Data communication relates to the information that sends and receive voice, packet and other type by wireless, honeycomb and/or mobile technology.Hereinafter, abbreviate these technology as " mobile communication " for easy.
Mobile communication relates to access network (AN) and access terminal signal transmission and data service processing between (AT), and various processing procedure.Just as understood by those skilled in the art, access network (AN) comprises a plurality of assemblies, and one of them is the base station.Access terminal (AT) various ways can be arranged, comprise travelling carriage (for example mobile phone), portable terminal (for example kneetop computer) and combination function, perhaps have the miscellaneous equipment (personal digital assistant for example: PDA) of other terminal capabilities with travelling carriage and portable terminal.Hereinafter, for easy, will access terminal (AT) abbreviates " travelling carriage " as.
In typical mobile communication system, base station network serve a plurality of travelling carriages (for example, honeycomb/mobile phone, kneetop computer, PDA(Personal Digital Assistant), or the like), make travelling carriage can with other component communication in the communication system.Known have various types of mobile communication system and a standard, comprise cellular system, code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), personal communication service (PCS), and be called next generation mobile communication system and (comprise the third generation (3G), such as IMT-2000 (international mobile telecommunication 2000), and the 4th generation (4G) mobile communication system) various enhancing and improvement to it.
CDMA accepts extensively the most, and is continuing development and developing.Particularly, the evolution of CDMA technology (such as so-called " cdma2000 " technology or other cdma system of future generation) will provide integrated voice and HRPD (high rate packet data), video and video conference performance simultaneously.For example, the system that comes from the CDMA evolution comprises only data (1xEV-DO) technology of high data rate (HDR) technology, cdma2000 1xEV-DV (1xEVolution-data and voice) and 1xEVolution-, or the like.
The disclosure concentrates on the data transmission technology between base station and the travelling carriage.Therefore, omitted the detailed description of additional assembly, parts and processing procedure (not specifically noting) here, and do not caused feature of the present invention to thicken.Those skilled in the art will appreciate that relevantly with travelling carriage with base station well known in the art, but also is not part of the present invention in various other assemblies and the technology of this detailed description.For example, omitted the detail of protocol architecture, physical layer channel, protocol negotiation and the processing or the like of air interface with hierarchy.
In communication system, " channel " group makes the signal can be under specified frequency is distributed, at access network (for example base station) with access terminal and transmit between (for example travelling carriage).Channel comprises " forward channel " and " backward channel ".The signal transmission (transfer of data or transmission) from the base station to the travelling carriage via down link (being forward channel) is commonly called " forward link ", and is commonly called " reverse link " via transmitting from the travelling carriage to the signal of base station of up link (being backward channel).
Usually, forward link can comprise pilot channel (pilot), synchronizing signal channel (sync), paging channel (paging) and Traffic Channel (traffic).Here, the pilot signal on the pilot channel always has the transmission length of fixing (constant).
In mobile communication, because user's physical location and various mobility, the situation that is used for the wireless channel of transfer of data (forward link and reverse link) often changes.In mobile communication environment, effective utilization of several realization wireless channels is arranged, allow the method for high speed data transfer simultaneously.For the adaptive communications environmental change in the channel, it is known changing the method for chnnel coding and the method for change modulating mode.
By using chnnel coding, information data is repeatedly encoded reducing error rate, thereby because (redundancy) data that repeat have increased data quantity transmitted on wireless channel.Owing to customer location and ambulant variation, should consider the quality of mobile communication environment.When mobile communication environment is relatively good, uses high code-rate to encode and send a large amount of actual information data, to improve transmitted data rates with little redundancy.In addition,, use low encoding rate coding (mistake proofing), to allow to use lower transmitted data rates, so that transmission can antinoise with big redundancy when mobile communication environment worse time.
For the variation of modulating mode, when mobile communication environment is relatively good, use the transmission method that allows high speed data transfer, such as QAM (quadrature amplitude modulation) or MPSK (multiple phase shift keying), wherein send a plurality of data bits that are used for a transmitted symbol.When mobile communication environment worse time, use the method for low speed transmissions, such as BPSK (binary phase shift keying), although it has high interference noise level.
About chnnel coding and/or modulating mode, need estimate the channel circumstance that will when revising modulating mode and/or chnnel coding, use from receiving terminal (for example, travelling carriage in the forward link or the base station in the reverse link) feedack.
For reverse link, in the access procedure of travelling carriage, use the open Loop Power control method.Usually, when signal is when travelling carriage is transferred to the base station (on reverse link), the open Loop Power control method refers to the transmitting power of control travelling carriage.That is to say, make relatively lowly apart from the transmitting power of the travelling carriage of base station nearer relatively (perhaps with the base station sufficient signal link being arranged), relatively the transmitting power of the travelling carriage of (perhaps not having sufficient signal link with the base station) far away is relative higher apart from the base station and make.Like this, the base station can keep relative stability from the signal that travelling carriage receives.
Open Loop Power control relates to formula: Tx=constant-Rx, and wherein, Tx is the transmission power intensity of travelling carriage, Rx is the power (being pilot signal strength) that receives from the base station.Here, relatively large Rx value representation channel conditions good (for example, when travelling carriage during) near the base station, and also the Tx value is correspondingly less.On the contrary, less relatively Rx value representation channel conditions bad (for example, when travelling carriage during) away from the base station, and also the Tx value is correspondingly bigger.
Summary of the invention
Main points of the present invention are that the present inventor has recognized defective of the prior art.Particularly, for forward link, can use pilot signal to estimate and detect channel circumstance with fixing signal strength signal intensity.By contrast, the pilot signal that on reverse link, does not have fixed signal intensity, thus the channel circumstance of traditional forward link can't be estimated and detection technique is applied to reverse link and determines correction modulating mode and/or the required channel circumstance of chnnel coding.
Particularly, be to detect and/or estimate channel circumstance and/or situation from the feedback information of receiving terminal (being travelling carriage), with according to channel circumstance and/or situation revises modulating mode adaptively or chnnel coding is necessary.On the forward link, because the intensity of pilot signal fixes, so can use travelling carriage to receive and detected pilot signal strength (C/I) detects and/or estimates channel circumstance and/or situation.Travelling carriage is to its its detection that received of base station feedback and/or the information of estimated pilot signal intensity.After this, use such feedback information that sends in base station is realized the signal communication (for example, transfer of data) on the forward link.
But, pilot signal or the similar signal on reverse link, do not transmitted with constant intensity.Therefore, can't use pilot signal to determine and/or estimate channel circumstance and/or situation, also can't carry out the adaptability of suitable modulating mode or chnnel coding and select.
For above-mentioned the problems of the prior art, the inventor adopts improved open Loop Power control to estimate and determine the channel circumstance of the reverse link in access procedure, between travelling carriage and base station, to set up improved data link (being reverse link) easily, realize the mobile communication that strengthens.
In order on the reverse link of mobile communication system, to effectively utilize wireless channel and to realize high speed data transfer, can regulate modulating mode and/or chnnel coding adaptively according to the variation of wireless channel environment.In order to estimate channel conditions, travelling carriage sends to the base station by access channel and inserts message.First message transmission rate is determined according to the signal power level value that inserts message (signal) with from the detected real messages power level of access channel in the base station, and determines second message transmission rate according to locate detected signal load in the base station.Base station selected suitable message transmission rate, and modulating mode and/or chnnel coding after the application adjusting.
By distributing priority, can handle a plurality of travelling carriages to travelling carriage.By the restriction reverse link data transmission cycle, can handle a plurality of travelling carriages, and each travelling carriage can send lot of data.
Description of drawings
Fig. 1 has shown the call handling process according to reverse link data of the present invention (signal) transmission method;
Fig. 2 has shown when two or more users attempt to insert according to communication system of the present invention, the call handling process of reverse link data transmission method;
Fig. 3 has shown according to the present invention when wanting transferring large number of data, the call handling process of reverse link data transmission method;
Fig. 4 has shown according to the present invention when wanting transferring large number of data, utilizes newly-established channel to upgrade the call handling process of the reverse link data transmission method of message transmission rate;
Fig. 5 has shown the structure according to base station in the mobile communication system of the present invention.
The preferred embodiment explanation
The inventor recognizes and adaptive modulation and coding method (AMC) can't be applied to reverse link that because reverse link does not have the pilot signal of fixed signal intensity, and the channel conditions of reverse link can not be estimated in the base station.
But the present invention determines the signal transmission power of travelling carriage by using a kind of improved open Loop Power control method, and keeps determined transmitting power in the processing afterwards, thereby solves these problems.That is to say, by using a kind of technology of determining and/or estimating channel circumstance and/or situation, for the efficient data on reverse link transmission has realized the adaptively selected of suitable modulating mode or encoding rate, thus in access attempt with specific intensity transmission signals.This is to realize by improving traditional open Loop Power control method in such a way.
In access attempt, the intensity that keeps transmitting power is so that channel circumstance and/or the situation on the reverse link can be detected and/or estimate in the base station.Here be noted that, access attempt can be between travelling carriage and base station, do not set up Traffic Channel in (for example, travelling carriage is not in working order) carry out, also can be that (for example, travelling carriage is in running order) carries out when having set up Traffic Channel between travelling carriage and base station.If travelling carriage in running order (for example, Traffic Channel is set up) then can send the data about the transmission power intensity of travelling carriage on the The function of backward power control channel of newly-established channel.
Fig. 1 has shown the process of the call treatment of the adaptive modulation and coding method on the relevant reverse link;
At step S11, base station 20 is to travelling carriage 10 pilot signal transmitteds, and the intensity of this pilot signal is used to determine the Initial Trans intensity of travelling carriage 10.At step S12, travelling carriage 10 sends the access message of the Initial Trans strength information that includes travelling carriage 10 to base station 20.Here, Initial Trans intensity can be determined by two kinds of methods.
Transmission power intensity on the reverse link can be expressed as: Tx=constant-Initial R x, this is the improvement about the formula of traditional open Loop Power control method.Here, Tx is the transmission power intensity of travelling carriage, and Initial R x is the initial power (being the intensity of the pilot signal of base station transmission) that receives from the base station.
Because the Rx value of the lasting variation that variation caused of mobile communication environment, what traditional open Loop Power control method drew is the Tx value that changes.But, in the present invention, estimate channel circumstance by the Rx value being set (promptly fixing) for initial value, thereby transmission power level Tx fixes.
As selection, also can utilize said method to obtain transmission power intensity Tx, but add an offset (α), to obtain further improved transmission power of mobile station intensity.Afterwards, utilize the access message that sends to notify the transmission power intensity information to base station 20.Therefore, according to the present invention, the transmission power intensity on the reverse link also can be expressed as: Tx=constant-Initial R x+ α, Tx are the transmission power intensity of travelling carriage 10, and Initial R x is 20 initial powers that receive from the base station, and α is an offset.
Then at step S13, base station 20 utilize the Initial Trans strength information that sends by travelling carriage 10 and from the access channel actual detected to signal received power intensity determine the 1st possible data rate (DR that first can use at reverse link
A).
At step S14,,, determine second possible data rate (DR of reverse link such as load controller in the base station 20 or input controller (in Fig. 1, not showing) by detectors of load
B).Because a large amount of travelling carriages and base station communication, the suitable data rate of reverse link also may depend on the load at 20 places, base station, so draw the second data rate (DR
B).
At step S15, base station 20 is these two data speed (DR relatively then
AAnd DR
B), and with a less final data speed that is set at reverse link in these two.At step S16, base station 20 is notified the final data speed by paging signal to travelling carriage 10.Here, paging signal can comprise the selected data-rate information that had before obtained.
At last, at step S17, receive final data speed from base station 20 after, travelling carriage 10 sends data according to final data speed to base station 20.Here be noted that from travelling carriage 10 when base station 20 sends data, can use suitable modulation and coding method.
The inventor recognizes, can do further to improve and improve to said method.
For example, Fig. 2 shown as two and more user's (for example travelling carriage) and attempted access mobile communication system simultaneously, perhaps the call handling process when travelling carriage is also attempting to carry out subsequently access again to base station transmission data the time when.According to the present invention, the base station preferably only is that a user (travelling carriage) carries out above-mentioned call processing method, and sets its message transmission rate, and other user (travelling carriage) is set at wait.That is to say, user's (travelling carriage) is carried out prioritization, thereby set up their message transmission rates separately sequentially.
Particularly, after specific user's's (travelling carriage) packet data transmission was finished, beep-page message was sent to other travelling carriage in the base station, asked other travelling carriage to attempt being linked into again the base station.User's (travelling carriage) of the whole or given number of access base station carries out the processing of prioritization to attempting simultaneously can to repeat this as required.When travelling carriage received beep-page message, that carries out during with previous access attempt was the same, and travelling carriage is carried out improved open Loop Power control.In addition, travelling carriage sends page-response message, the Initial Trans intensity when showing access attempt in response to the beep-page message that receives to the base station.The base station receives this page-response message, determines suitable reverse link data transmission speed then as mentioned above, and the data rate that will use is notified to travelling carriage.Accordingly, the data rate notified according to the base station of travelling carriage sends grouped data.
At step S21, base station 20 sends the pilot signal that is received by two travelling carriages 10A, 10B.At step S22, each travelling carriage 10A, 10B side by side send to base station 20 by access channel and insert message, to attempt access.
At step S23 and S24, base station 20 sends paging signal (message) to travelling carriage 10A, 10B.Base station 20 is set a travelling carriage 10A and is received data, and data-rate information is included in the paging signal that sends to it.By waiting signal being included in the paging signal that sends to travelling carriage 10B, another travelling carriage 10B is set at standby mode by base station 20.
At step S25, travelling carriage 10A begins transfer of data, utilizes data-rate information to send data-signal to base station 20.Then, at step S26, base station 20 is detected travelling carriage 10A and when is finished its transfer of data, and sends paging signal to another travelling carriage 10B, asks another travelling carriage 10B to send the access attempt signal.
At step S27, travelling carriage 10B sends the access request signal that includes the Initial Trans strength information in response to this request to base station 20.At step S28, the desired data transmission rate is determined in base station 20, and sends this information by paging channel to travelling carriage 10B then.
At last, at step S29, travelling carriage 10B sends to base station 20 to data according to the message transmission rate that receives in advance at step S27.Here be noted that from travelling carriage 10 when base station 20 sends data, can use suitable modulation and coding method.
Therefore, determine that above-mentioned each travelling carriage should in mobile communication system, even two or more travelling carriage attempts to insert a base station, also can handle a plurality of travelling carriages efficiently in the method for the priority of base station transmits data.
As other improvement, the present invention also considers and has adapted to the situation that will send mass data.
If travelling carriage will send lot of data, then data send required totally chronic.This has caused several problems and defective.For example, when a travelling carriage when the base station sends data, other user (travelling carriage) can't be linked into this base station and send data.In addition, long-time send required for a long time in, mobile communication environment and/or situation change possibly, thus communication link may disconnect.
In order to overcome this defective, the present invention can limit the time that travelling carriage can send data to the base station.In limited time, the base station can stop or limit the current transmission from specific travelling carriage when reaching setting, and can be to this travelling carriage transmission beep-page message, asks this travelling carriage access base station again after a while.Here, as understood by one of ordinary skill in the art, can set the restriction time limit according to mobile communication system desired particular characteristics or other communication condition.In addition, can be set in the different time according to the requirement of communication system inserts again.
Fig. 3 has shown how realize the example that time restriction requires according to the present invention.What it is also noted that here is, except the content of the paging signal that mails to travelling carriage 10A, 10B from base station 20, all steps and process all are equal to step and the process among Fig. 2 of previous elaboration.That is to say, can be in addition send transmission time information, make specific travelling carriage have the regular hour to each travelling carriage 10A, 10B, at this moment between in it can send data to base station 20.
Can send time of data by the restriction travelling carriage, other travelling carriage can be at access base station in rational time, thereby can be effectively and handle a plurality of users (travelling carriage) efficiently.In addition, time restriction allows to consider the variation of communication environment and situation.Considered more accurate and up-to-date mobile communication condition and requirement, the base station can be with message transmission rate more effective and that upgrade and regulate travelling carriage more efficiently continually.Here be noted that from travelling carriage 10 when base station 20 sends data, can use suitable modulation and coding method.
Fig. 4 shown when a travelling carriage will be when the base station sends mass data, data transmission period is reduced to minimum another kind of method.Except existing communication channel, current when in running order when travelling carriage, that is,, can newly set up a The function of backward power control channel and forward link control channel when travelling carriage during to the base station transmits data.
When travelling carriage during to the base station transmits data, set up a new control channel, thereby make travelling carriage can receive new reverse link data transmission speed from the base station, be used for the transfer of data in the next transfer of data time limit.Like this, travelling carriage can receive different message transmission rate information continuously, makes travelling carriage send data on formed reverse link in the minimum time.
That is to say that travelling carriage 10 is 20 reception reverse link data transmission speed and transmission time information from the base station, and begin to transmit data, use up up to the transmission time that is allowed with the message transmission rate that receives.Shown in step S41, when arriving transmission end time, travelling carriage 10 sends the current transmit power strength information by newly-established The function of backward power control channel to base station 20.
At step S42, base station 20 utilizes the service call signal of the channel of current transmission data, determines reverse link data rate DR
C, transmission power information, and out of Memory.Simultaneously, shown in step S43, the load controller in the base station 20 is determined other reverse link data rate DR according to the load on the Traffic Channel
DAfterwards, at step S44, base station 20 is DR relatively
CAnd DR
D, and the smaller value in these two values is set at the final data speed of reverse link.
At step S45, base station 20 sends to travelling carriage 10 by newly-established forward link control channel with final data speed.At step S46, behind the DTD in previous time limit, travelling carriage 10 sends data according to new data rate then.Afterwards, can repeat above-mentioned steps as requested, thereby transfer of data can last till that all expected datas all send to base station 20 from travelling carriage 10 on reverse link.Here be noted that from travelling carriage 10 when base station 20 sends data, can use suitable modulation and coding method.
Fig. 5 has shown the part-structure according to base station of the present invention.A plurality of travelling carriage 10A to 10N can be served in base station 20.Base station 20 of the present invention can comprise transmitter 22, receiver 24, detectors of load 26 and processor 26, and they are cooperated effectively, with execution graph 1 to call handling process shown in Figure 4.
For example, transmitter 22 is with primary power level emission pilot signal.Receiver 24 receives the access signal with signal power level value relevant with this emission pilot signal by access channel then.Detectors of load 26 effectively is connected with receiver 24, determine the signal load at 20 places, base station, processor 28 effectively is connected with transmitter 22, receiver 24 and detector 26, determine first data-rate value according to the signal power level value that inserts signal with from the detected actual signal power level of access channel, determine second data-rate value according to detected signal load, and first and second data-rate value relatively, to select wherein less one.Here, transmitter 22 sends the paging signal that comprises selected data-rate value according to the selection of processor 28, and receiver 24 receives the data according to selected data-rate value transmission.
As mentioned above, according to the present invention, improved traditional open Loop Power control method, thereby transmission power intensity is constant in access procedure.Insert message by sending to travelling carriage, the wireless channel environment or the situation of reverse link can be determined or estimate in the base station.According to determine or the estimated channel situation, can adopt only modulation and coding method adaptively, with the packet data transmission of maximization on the reverse link, thereby in mobile communication system, handle a plurality of users (travelling carriage) efficiently.
More than variation in the data transmission technology between the travelling carriage of serving with regard to base station and base station, concentrate on the transmission on the reverse link in the cdma system of future generation, the present invention is set forth.But, be appreciated that the present invention can be conveniently used in other occasion, other mobile communication system that is included in the channel of other type and develops for process data packets transmission.
This specification has been set forth the different illustrative embodiment of method and apparatus of the present invention.The scope of claim is intended to contain the various improvement and the equivalent structure of the disclosed illustrative embodiment of this specification.Therefore, should carry out the explanation of reasonably broad sense to appending claims, to contain the improvement consistent, equivalent structure and feature with the spirit and scope of the present invention disclosed herein.
Claims (28)
1. system that is used at the reverse chain channel transmitting data comprises:
Transmitter is with constant power level pilot signal;
Receiver has the access message of the signal power level relevant with described emission pilot signal by the access channel reception;
Detectors of load links to each other with described receiver, determines the signal load at place, base station; And
Processor, effectively link to each other with described transmitter, receiver and detectors of load, determine first data-rate value according to the signal power level value of described access signal with from the detected actual signal power level of access channel, determine second data-rate value according to detected signal load, and more described first and second data-rate value, to select wherein less value;
Wherein, described transmitter is according to the described selection of processor, and emission includes the paging signal of selected data-rate value, and described receiver receives the data according to selected data-rate value transmission.
2. system according to claim 1 is characterized in that:
Described receiver receives the access signal respectively from two or more travelling carriages;
Described processor inserts the travelling carriage distribution priority of signal to receiver to sending; And
Described transmitter includes first paging signal of selected data-rate value to the travelling carriage emission with limit priority under the control of processor, and comprise second paging signal of wait command to all remaining travelling carriage emissions.
3. system according to claim 2 is characterized in that, described receiver receives data from the travelling carriage with limit priority.
4. system according to claim 3, it is characterized in that, described transmitter comprises first paging signal of selected data-rate value to the travelling carriage emission with inferior high priority under the control of processor, and comprise second paging signal of wait command to all remaining travelling carriage emissions.
5. system according to claim 4 is characterized in that, described receiver receives data from the travelling carriage according to the priority orders emission data of being distributed.
6. system according to claim 1 is characterized in that, the paging signal that described transmitter sends also comprises the transmission time limit.
7. system according to claim 6 is characterized in that:
Described receiver receives the access signal respectively from two or more travelling carriages;
Described processor inserts the travelling carriage distribution priority of signal to receiver to sending; And
Described transmitter includes first paging signal of selected data-rate value to the travelling carriage emission with limit priority under the control of processor, and comprise second paging signal of wait command to all remaining travelling carriage emissions.
8. system according to claim 7 is characterized in that, described receiver receives data from the travelling carriage with limit priority in the described transmission time limit.
9. system according to claim 8, it is characterized in that, described transmitter comprises first paging signal of selected data-rate value to the travelling carriage emission with inferior high priority under the control of processor, and comprise second paging signal of wait command to all remaining travelling carriage emissions.
10. system according to claim 9 is characterized in that, described receiver receives data from the travelling carriage according to the priority orders emission data of being distributed in the transmission time limit of each travelling carriage.
11. system according to claim 10, it is characterized in that, described processor is that travelling carriage with inferior high priority is determined and selected in described first or second data-rate value one, and the transfer of data of being carried out by the travelling carriage of previous selection is still being carried out simultaneously.
12. a system that is used at the reverse chain channel transmitting data comprises:
Receiver receives the mobile station signal of launching with certain signal power level by the The function of backward power control channel;
Detectors of load links to each other with described receiver, determines the signal load at place, base station;
Processor, effectively link to each other with detectors of load with described receiver, according to the signal power level of described mobile station signal and from newly-established Channel Detection to the actual signal power level determine first data-rate value, determine second data-rate value according to detected signal load, and more described first and second data-rate value are to select wherein less value; And
Transmitter effectively links to each other with described processor, sends selected data-rate value by forward link control channel to travelling carriage, and described receiver receives the data according to selected data-rate value transmission.
13. the method at the reverse chain channel transmitting data comprises:
Estimate the channel circumstance on the reverse link;
According to described estimation and signal of base station load specified data speed;
Send data-rate information according to determined data rate to travelling carriage;
On reverse link, receive data with described determined data rate transmission.
14. method according to claim 13 is characterized in that, described estimating step is to be undertaken by the transmitting power of fixing described travelling carriage.
15. method according to claim 13 is characterized in that, described estimating step is undertaken by sending transmission power information from travelling carriage to the base station.
16. method according to claim 13 is characterized in that, described estimating step be by when travelling carriage is in running order according to the dump power of travelling carriage, use the peak transfer rate of travelling carriage to carry out.
17. method according to claim 13 is characterized in that, when two or more travelling carriages were attempted simultaneously access base station, described certain step comprises selected specific travelling carriage to carry out transfer of data, and other travelling carriage is set at wait.
18. method according to claim 17 is characterized in that, all travelling carriages are endowed priority, thereby each travelling carriage sends data to the base station successively.
19. method according to claim 17 is characterized in that, selected travelling carriage sends data in the limited time, after the described limited time uses up, and the selected successively transmission data of other travelling carriage.
20. method according to claim 13, it is characterized in that in the current transmission time, travelling carriage is with the current data rate sending data, and before the current transmission time finishes, obtain the new data rate that is suitable in the transmission time subsequently, sending data from the base station.
21. method according to claim 1 is characterized in that, the data of transmitting on reverse link with determined data rate have modulating mode and/or the chnnel coding that is applied thereon adaptively.
22. the method at the reverse chain channel transmitting data comprises:
Transmission power of mobile station is set in control according to initial open loop power;
Notify the transmitting power of described setting to the base station;
Transmitting power with described setting sends data to the base station;
Access channel detection signal received power from the travelling carriage use;
By detecting channel circumstance the access message that receives from travelling carriage;
Signal received power and detected channel circumstance according to travelling carriage are determined first data rate;
Obtain second data rate of reverse link from load controller;
More described first data rate and second data rate;
Relatively the smaller value in first data rate and second data rate is set at final data speed according to described;
Notify described final data speed to travelling carriage; And
The data that reception sends from travelling carriage with described final data speed.
23. method according to claim 22 is characterized in that, if send data to the base station simultaneously more than one travelling carriage, then be that a travelling carriage is carried out described detection step, and postponement is carried out described detection step for other travelling carriage.
24. method according to claim 23 is characterized in that, and is further comprising the steps of:
To after the finishing dealing with of described single mobile station, other travelling carriage of paging; And
Carry out described detection step, carry out the processing of other travelling carriage subsequently, think that it determines the data rate that transmits on reverse link.
25. method according to claim 24 is characterized in that, is not that described other travelling carriage is carried out other open Loop Power control.
26. method according to claim 24 is characterized in that, and is further comprising the steps of: the transfer of data to each travelling carriage is set the time limit.
27. the method at the reverse chain channel transmitting data comprises:
Send the mobile station signal of certain power level by newly-established The function of backward power control channel;
Pass through forward link control channel, rate of received data information, described data-rate information is definite by one in first data-rate value and second data-rate value, wherein said first data-rate value based on the signal power level of travelling carriage message and from newly-established The function of backward power control Channel Detection to the mobile station signal power level, described second data-rate value is based on detected signal load; And
According to sending business datum by determined modulating mode of described data-rate information or encoding rate.
28. the method at the reverse chain channel transmitting data comprises:
Send the transmission power information of travelling carriage by newly-established The function of backward power control channel;
Receive data transmission rate information by forward link control channel, described data-rate information be by described transmission power information and from professional Channel Detection to signal power level determine; And
According to sending business datum by determined modulating mode of described data-rate information or encoding rate.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR21273/2001 | 2001-04-20 | ||
| KR10-2001-0021273A KR100374361B1 (en) | 2001-04-20 | 2001-04-20 | Method of reverse link transmission |
| KR1020010032353A KR100362556B1 (en) | 2001-06-09 | 2001-06-09 | A heat sink inline attach system of printed circuit board for b,g,a |
| KR32353/2001 | 2001-06-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1383335A true CN1383335A (en) | 2002-12-04 |
| CN100477551C CN100477551C (en) | 2009-04-08 |
Family
ID=26639003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021180776A Expired - Fee Related CN100477551C (en) | 2001-04-20 | 2002-04-22 | System and method for transmitting data in reverse chain channel |
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| CN (1) | CN100477551C (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352189C (en) * | 2003-05-10 | 2007-11-28 | Lg电子株式会社 | Method for transmitting control signal for reverse chain packet transmission |
| WO2007140669A1 (en) * | 2006-05-31 | 2007-12-13 | Huawei Technologies Co., Ltd. | Method and system for providing wireless network connection |
| CN100459790C (en) * | 2003-06-17 | 2009-02-04 | 艾利森电话股份有限公司 | Reverse link rate control method and system in a mobile communication network |
| US7715862B2 (en) | 2004-10-08 | 2010-05-11 | Nokia Corporation | Coding selection method |
| CN101019461B (en) * | 2006-05-31 | 2010-10-20 | 华为技术有限公司 | Method and system for wireless network connection |
| CN101449611B (en) * | 2006-05-19 | 2011-05-04 | 京瓷株式会社 | Communication system, communication device, and communication rate modification method |
| CN101310540B (en) * | 2005-11-16 | 2011-11-23 | 英属开曼群岛威睿电通股份有限公司 | Multi-carrier wireless communication access terminal and data transmission method |
| CN101282141B (en) * | 2007-04-05 | 2012-06-06 | 华为技术有限公司 | Method, apparatus and system for transmitting and receiving data |
| CN103891368A (en) * | 2011-09-14 | 2014-06-25 | 高通股份有限公司 | Methods and apparatus for interference based joint scheduling of peer to peer links with wwan |
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2002
- 2002-04-22 CN CNB021180776A patent/CN100477551C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100352189C (en) * | 2003-05-10 | 2007-11-28 | Lg电子株式会社 | Method for transmitting control signal for reverse chain packet transmission |
| US7496058B2 (en) | 2003-05-10 | 2009-02-24 | Lg Electronics Inc. | Method of transmitting control information for reverse link packet transmission |
| CN100459790C (en) * | 2003-06-17 | 2009-02-04 | 艾利森电话股份有限公司 | Reverse link rate control method and system in a mobile communication network |
| US7715862B2 (en) | 2004-10-08 | 2010-05-11 | Nokia Corporation | Coding selection method |
| CN101310540B (en) * | 2005-11-16 | 2011-11-23 | 英属开曼群岛威睿电通股份有限公司 | Multi-carrier wireless communication access terminal and data transmission method |
| CN101449611B (en) * | 2006-05-19 | 2011-05-04 | 京瓷株式会社 | Communication system, communication device, and communication rate modification method |
| WO2007140669A1 (en) * | 2006-05-31 | 2007-12-13 | Huawei Technologies Co., Ltd. | Method and system for providing wireless network connection |
| CN101019461B (en) * | 2006-05-31 | 2010-10-20 | 华为技术有限公司 | Method and system for wireless network connection |
| CN101282141B (en) * | 2007-04-05 | 2012-06-06 | 华为技术有限公司 | Method, apparatus and system for transmitting and receiving data |
| CN103891368A (en) * | 2011-09-14 | 2014-06-25 | 高通股份有限公司 | Methods and apparatus for interference based joint scheduling of peer to peer links with wwan |
| CN103891368B (en) * | 2011-09-14 | 2019-03-01 | 高通股份有限公司 | The method and apparatus of combined dispatching for peer link and WWAN based on interference |
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