CN1492706A - Parallel data processing method of radio data communication system - Google Patents
Parallel data processing method of radio data communication system Download PDFInfo
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- CN1492706A CN1492706A CNA021459630A CN02145963A CN1492706A CN 1492706 A CN1492706 A CN 1492706A CN A021459630 A CNA021459630 A CN A021459630A CN 02145963 A CN02145963 A CN 02145963A CN 1492706 A CN1492706 A CN 1492706A
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Abstract
A parallel data process method for a radio data communication system is that uses share one down service transfer time step, the base station takes transfer of the leading sequence as the beginning of every down service transfer time step, the user mobile station receives the down data belonging to it and returns back the checked result response to the base station. The method also includes: a) predesigning data process numbers needed to finished by every user mobile station supporting parallel data process as the threshold value of the leading sequence numbers; b) assigning one leading sequence to each user mobile station, each one corresponds to a data process procedure, and numbers of the leading sequence is smaller to equals to the threshold of the said user leading sequence numbers.
Description
Technical field
The present invention relates to the data processing technique in the wireless communication system, refer to a kind of parallel data processing method that is used for wireless data communication system especially.
Background technology
Radio communication can satisfy the demand of people to keeping connecting each other whenever and wherever possible, and radio communication had obtained swift and violent development in recent years.At present, the number of users of mobile phone is approaching also very soon will be above the number of users of landline telephone.Yet different with wire communication, the usable spectrum resource of radio communication is limited, and the frequency of wireless transmission is high more, and along with the increase of propagation distance, the decline of signal is big more, and simultaneously, wireless signal is subjected to weather, and is also obvious more as the influence of factors such as rainwater.The frequency range that radio communication is used is high more, and its service radius is more little, and cost of serving is high more, therefore, improves spectrum efficiency, that is: making in the unit interval on the unit frequency range information bit number increase of reliable transmission is important research project very in the radio communication.
In radio communication, square being inversely proportional to of the received power of direct wave and its receiving range, if indirect wave, then the loss meeting of received power is bigger.Since this relaxation phenomenon of signal power, in a sub-district of radio communication, the user of different location, the signal to noise ratio difference of its received signal, thus the spectrum efficiency that can realize is also different.In general, under the situation of using comparable bandwidths, near more with the base station distance of radio communication, then the traffic rate that can realize is high more, and its availability of frequency spectrum is also high more.The wireless speech business need no matter this user is in what place in the sub-district, all is necessary for the user and keeps certain traffic rate.Yet Packet data service but allows within a certain period of time, can be temporarily not for this user provide data, services, and this subscriber channel condition has when improvement by the time, distributes wireless communication resources for this user again.Therefore, speech business relatively, there is the possibility that significantly improves wireless frequency spectrum efficient in the clear data wireless communication system.
At present, an instantiation of pure packet data wireless communication system is a CDMA2000 1xEV/DO system, this CDMA2000 1xEV/DO system has obviously improved the efficient of downlink grouped data transmission by adopting time division way for different user in the sub-district provides the method for data service.This system has fully phased out the method for power control, and has used link adaptation techniques instead aspect downlink transfer, realizes the self adaptation adjustment according to the channel condition of different user, is that the user provides satisfied data service with different data rates.
The base station is according to data rate control (DRC) signaling bit and quality of services for users requirement that different user reported, which user's service arranges current downlink business resource by scheduling is, the length of shared downlink business resource and the modulation coding mode of use are all determined by the DRC of reporting of user.
The base station is by being scheduling to each user's allocation of downlink service resources, some chip lengths of this downlink business resource beginning are used to transmit targeting sequencing Preamble, therefore the corresponding unique targeting sequencing of each user, utilizes targeting sequencing can distinguish the business datum of different user.When the user detects the targeting sequencing of being launched on one section downlink business resource and self is complementary, assert that then the data follow thereafter issue this user, and the beginning downlink data receiving; Otherwise, do not receive this section downlink data, continue to intercept the downlink business resource of back, can realize multi-user's sharing thus to the downlink business resource.
The shared downlink business number of resources of user may be 16 time slots, 8 time slots, 4 time slots, 2 time slots or 1 time slot.When the user once was assigned to downlink business resource more than 1 time slot, the agreement regulation among the CDMA2000 1xEV/DO must separate with 3 other users' time slot between continuous two time slots of distributing to same user.As shown in Figure 1, the base station is allocated four transmission time slots in advance and is given a user, that is: time slot n, time slot n+4, time slot n+8 and the time slot n+12 that fills with oblique line in the fl transmission channel distributed to same user, respectively as first transmission time slot, second transmission time slot, the 3rd transmission time slot and the 4th transmission time slot of this user's downlink business resource, be separated with 3 time slots of distributing to other user between between each transmission time slot of this user.As can be seen from the figure, before sending each user's downlink service data, the user can send a DRC request to the base station, that is: the time slot of filling with grid in the DRC channel, so that base station scheduling and the downlink business resource of distributing this current user, and, the user can be in the base station next time before self gives line data, return check results ACK or the NAK that this receives data to the base station, that is: the time slot of filling with backslash in the ack channel, wherein, ACK represents to receive correct, and NAK represents to receive mistake.
The benefit of above-mentioned way is: the user just receives check results to base station feedback after not necessarily needing to receive the data of all time slots, but after receiving the previous section time slot, just carry out verification, if it is correct, just can send ACK to the base station in advance confirms, after feedback was received in the base station, the time slot that the back can be distributed to this user was used to transmit the new information of this user or distributes to other user.More particularly, as shown in Figure 1, this user is after the data that receive transmission time slot 3, just returned the ACK affirmation, distributed to this user's the 4th transmission time slot so originally, i.e. time slot n+12 to the base station, just can be used to transmit the new information of this user or distribute to other user, therefore, as can be seen from the figure, time slot n+12 is again as the transmission time slot 1 of new data transmission process.The aforesaid operations mode is called mixed automatic re-send request may mode (H-ARQ, HybridAutomatic Repeat Request), and this mode can effectively reduce the transmission time of data reality, improves the transmission rate of data relatively.
Selected mode is when once only distributing the downlink resource of a slot length in user DRC asks, and whether CDMA2000 1xEV/DO adopts high-rise radio link protocol (RLP, Radio Link Protocol) to adjudicate to need to retransmit.
From the implementation procedure of such scheme as can be known, reserve sufficient data processing time in order to give user's travelling carriage, so that effectively utilize each time data retransmission, improve system transmissions efficient, CDMA2000 1xEV/DO agreement regulation, when distributing the multi-slot downlink resource, necessary 3 other users' time slot at interval between continuous two time slots of a user.So, even other user of current needs acceptance service seldom, even do not have, and the active user also can only use the downlink business resource of system 1/4, is unfavorable for improving the user's data transmission rate.
In addition, CDMA2000 1xEV/DO is whether to need to carry out data re-transmission by high-rise RLP control when distributing the downlink resource of a time slot, and this makes the time delay of control bigger; Because the buffer memory of travelling carriage is limited in one's ability, when handling data retransmission, physical layer is difficult to utilize the previous transmission information of this segment data again, so also is unfavorable for the raising of system transmissions efficient again.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of parallel data processing method of wireless data communication system, can utilize continuous downlink business resource to finish same user's different pieces of information processing procedure, to improve the message transmission rate of unique user, and guarantee that physical layer has the sufficient retransmission process time, avoid retransmitting the system effectiveness of bringing simultaneously and reduce by upper-layer protocol control.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of parallel data processing method of wireless data communication system, share a downlink traffic transmission period by above user's travelling carriage, the base station begins the transmission of each downlink traffic transmission period with targeting sequencing, user's travelling carriage receives one's own downlink data according to targeting sequencing, and return the check results that receives this downlink data to the base station and reply, key is that this method also comprises:
A. preestablish the required data handling procedure number of finishing of user's travelling carriage that each supports that parallel data is handled, as targeting sequencing number threshold value;
Distribute at least one targeting sequencing b. for each user's travelling carriage, each targeting sequencing is to a data processing procedure that should user's travelling carriage, and this user's targeting sequencing number is smaller or equal to this user's targeting sequencing number threshold value.
In the said method, adjacent two downlink business periods can be distributed to the different user travelling carriage according to factors such as user's data dispositions, or the different pieces of information processing procedure of same user's travelling carriage, or the same data handling procedure of same user's travelling carriage.
Wherein, described targeting sequencing number threshold value is not less than travelling carriage and finishes the time of a data processing and two downlink business merchants' in the time interval between the period smallest positive integral.
Described base station is returned the check results that receives this downlink data and is replied and be meant between the data handling procedure that check results replys and replied that fixed timing relationship is arranged; Or user's travelling carriage is replied check results with the data handling procedure of institute's reply data and number is issued the base station.
By such scheme as can be seen, key of the present invention is: for each user distributes at least one targeting sequencing, each targeting sequencing is to a data processing procedure that should the user, and the targeting sequencing number that can distribute of same user is determined when finishing time of a data processing and two adjacent downlink business by current mobile station in the intersegmental time interval.
Therefore, the parallel data processing method of wireless data communication system provided by the present invention, because system distributes a plurality of targeting sequencings for each user who supports parallel data to handle, make and support the travelling carriage of parallel data processing procedure can start a plurality of data handling procedures simultaneously, that is to say, can handle same user's different pieces of information in the continuous downlink business period, and need not continuous two downlink business of same user between the period must with downlink business period of other user separately, the adjacent downlink business period can be distributed to same user or different user, thereby system transmissions efficient and disposal ability have been improved, reduced the waste of downlink business resource, given full play to the message transmission rate of wireless data users, also strengthened simultaneously the re-transmission control ability of physical layer, and resource allocation is more flexible.In addition, whether data of the present invention retransmit by the physical layer decision, and do not relate to high-rise RLP, and the system effectiveness that so can avoid upper-layer protocol control to be brought reduces.
Description of drawings
Fig. 1 is that each channel time slot of CDMA2000 1xEV/DO system is distributed schematic diagram in the prior art;
Fig. 2 is an embodiment schematic diagram of parallel data processing mode of the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
Because in the wireless data communication system, its downlink traffic transmission period is to be shared by a plurality of users, the base station begins the transmission of each downlink traffic transmission period with targeting sequencing, therefore, the present invention distributes a plurality of targeting sequencings for the user who supports the parallel data processing procedure, the corresponding data processing procedure of each targeting sequencing that is: is distinguished this user's different pieces of information processing procedure with targeting sequencing.Therefore, in the present invention, the targeting sequencing that distributes for the user can not only identify different users, and when same user obtained a plurality of targeting sequencing, this targeting sequencing also identified this user's different pieces of information processing procedure.For the user who does not support the parallel data processing procedure, the same with prior art of the present invention distributes a targeting sequencing to give this user.
This is the method that a user distributes a plurality of targeting sequencings number, make in the process of user's segment data when handling a downlink business, the base station does not need to stop to send to this user's downlink data, as long as the user has enough disposal abilities, in the middle of the process of the data of handling a downlink business period, still can receive and handle the new downlink data that sends to this user, only the new data of parallel processing belongs to different data handling procedures with the data of this downlink business period.In other words be exactly: based on thought of the present invention, adjacent downlink business resource can be solved and same user's problem can not be distributed to, the processing of packet during if travelling carriage can not be finished the current data processing procedure a downlink business period, it not only can continue the packet in this data handling procedure is handled in next downlink business period, also can start simultaneously reception and processing to packet in another data handling procedure, making full use of the downlink business resource, and give full play to the disposal ability and the transmission rate of travelling carriage.
Among the present invention, a complete data handling procedure comprises following step:
1) base station sends a downlink data packet to active user's travelling carriage;
2) travelling carriage elder generation receiving preamble sequences, and analyze whether to one's name one of several targeting sequencings of this targeting sequencing, and then confirm whether the data of this descending period are the data of distributing to oneself, if, after then travelling carriage receives this packet, recover the information of this packet; And receive verification, obtain check results;
3) travelling carriage is sent out check results with the ACK/NAK signaling to the base station and is replied, and determines whether correctly to receive this packet;
4) base station determines to issue next time this user's data bag content according to the user ACK/NAK response of receiving.
Above-mentioned steps is the process that data are handled, and a plurality of data handling procedures of same user are all fours, is the targeting sequencing difference of each data handling procedure correspondence, the data content difference of processing.
But the targeting sequencing number that same user will be distributed in the base station is limited, and the threshold value of setting this targeting sequencing number is N
Max, N then
MaxValue and travelling carriage time and two time intervals of downlink business between the period of finishing a data processing relevant.Here, the time that travelling carriage is finished a data processing is meant: travelling carriage begins from handling the data of current downlink business the period, the data processing of current downlink business period is finished, discharges the required time of data of handling required calculating and storage resources, can begin to handle next downlink business period to travelling carriage, just the required time in the data handling procedure step 2, setting this section period is T
ProSimultaneously, the time interval between the zero hour of the zero hour of a setting downlink business period of base station and next downlink business period is TTI.Then:
That is to say N in the formula (1)
MaxFor being not less than T
ProSmallest positive integral divided by TTI merchant.
By the data handling procedure of front as can be seen, each data handling procedure is wanted a corresponding ACK or NAK signaling, and therefore, the check results that travelling carriage sends to the base station is replied must be corresponding with this processing procedure.In practical operation, concrete corresponding method has two kinds: first kind is to make check results reply and the base station sends between the data of this period fixing sequential relationship is arranged; Second kind to be travelling carriage with check results reply with the processing procedure of institute's reply data number sends to the base station, this processing procedure number a plurality of data handling procedures in can the same travelling carriage of unique difference.
Radio data system with a time division duplex is an example, further specifies the realization of technical solution of the present invention.As shown in Figure 2, each TTI comprises two parts among the figure: a part can be used as the downlink business period for descending; Another part is up, can be used as travelling carriage and uploads the period that ACK/NAK replys to the base station.
Set the travelling carriage of user a and can support the parallel data processing procedure, and this travelling carriage is finished the time T of a data processing
ProGreater than one times of TTI, but less than twice TTI.So, according to formula (1), N
MaxShould be 2, therefore is that this user a distributes two targeting sequencings, makes this user can realize simultaneously two data processes being carried out parallel processing, so just can make this user make full use of all downlink business resources.
As can be seen from the figure, system has been a user a continuous dispensing a plurality of downlink business periods, that is: downlink business period n～downlink business period n+5 or the like.Wherein, downlink business period n, n+2 belong to data handling procedure 1, downlink business period n+1, n+3 belong to data handling procedure 2, the ACK/NAK to each downlink business period that travelling carriage sends to the base station replys and fixedly appears at corresponding downlink business in the 2nd the up period after the period, certainly, this ACK/NAK replys any up period after also can fixedly appearing at the corresponding downlink business period, as long as sequential is fixing.Like this, the base station is according to the data of replying determine period n+2 needs biography of travelling carriage to downlink business period data that n passes; According to the data of replying determine period n+3 of travelling carriage, so analogize descending period n+1.
So, concerning each packet of each data handling procedure, the processing time all is enough, and for user a, can take continuous a plurality of downlink business periods again, therefore can make system support this user's data speed to greatest extent.In addition,, therefore alleviated the burden of upper-layer protocol control, and can make full use of retransmission information, improved the Data Receiving accuracy because under the mode that parallel data is handled, retransmitting control can finish in physical layer.
Claims (5)
1, a kind of parallel data processing method of wireless data communication system, share a downlink traffic transmission period by above user's travelling carriage, the base station begins the transmission of each downlink traffic transmission period with targeting sequencing, user's travelling carriage receives one's own downlink data according to targeting sequencing, and return the check results that receives this downlink data to the base station and reply, it is characterized in that this method also comprises:
A. preestablish the required data handling procedure number of finishing of user's travelling carriage that each supports that parallel data is handled, as targeting sequencing number threshold value;
Distribute at least one targeting sequencing b. for each user's travelling carriage, each targeting sequencing is to a data processing procedure that should user's travelling carriage, and this user's targeting sequencing number is smaller or equal to this user's targeting sequencing number threshold value.
2, method according to claim 1, it is characterized in that: adjacent two downlink business periods are distributed to the different user travelling carriage, or distribute to the different pieces of information processing procedure of same user's travelling carriage, or distribute to the same data handling procedure of same user's travelling carriage.
3, method according to claim 1 is characterized in that: described targeting sequencing number threshold value is not less than travelling carriage and finishes the time of a data processing and two downlink business merchants' in the time interval between the period smallest positive integral.
4, method according to claim 1 is characterized in that: between the data handling procedure that described check results is replied and replied fixed timing relationship is arranged.
5, method according to claim 1 is characterized in that: described base station is returned the check results that receives this downlink data and is replied that to be user's travelling carriage with check results reply with the data handling procedure of institute's reply data number issues the base station.
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| CNB021459630A CN100426902C (en) | 2002-10-25 | 2002-10-25 | Parallel data processing method of radio data communication system |
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| CNB021459630A CN100426902C (en) | 2002-10-25 | 2002-10-25 | Parallel data processing method of radio data communication system |
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| CN100426902C CN100426902C (en) | 2008-10-15 |
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| CA2261548A1 (en) * | 1998-03-06 | 1999-09-06 | Lucent Technologies Inc. | Time division multiple access communication system |
| US20020071407A1 (en) * | 2000-07-08 | 2002-06-13 | Samsung Electronics Co., Ltd. | HARQ method in a CDMA mobile communication system |
| CN1205823C (en) * | 2002-04-28 | 2005-06-08 | 武汉汉网高技术有限公司 | Group data transmission method and equipment based on CDMA bandspread technology |
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Granted publication date: 20081015 Termination date: 20191025 |