CN101355798B - Transmission method for TD-SCDMA/HSDPA multi-code channel - Google Patents
Transmission method for TD-SCDMA/HSDPA multi-code channel Download PDFInfo
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- CN101355798B CN101355798B CN2008100697034A CN200810069703A CN101355798B CN 101355798 B CN101355798 B CN 101355798B CN 2008100697034 A CN2008100697034 A CN 2008100697034A CN 200810069703 A CN200810069703 A CN 200810069703A CN 101355798 B CN101355798 B CN 101355798B
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Abstract
The invention relates to a TD-SCDMA/HSDPA multi-code transmission method. The method comprises: the data frame format during code transmission is changed in the same time slot; when the data transmitted in multiple code channels is framed, only a Midamble code of a certain length is reserved in one code channel of a plurality of channels assigned to users, while the positions of the Midamble code in other code channels can be fill with other data symbols to be transmitted. Under condition of the same resource consumption, the method allows more data to be transmitted, thereby making full use of the prior system resources and improving the performance and capacity of the system.
Description
Technical field
The present invention relates to the communications field, particularly a kind of time slot format that carries out many code channel transmission in same time slot improves many yards transfer approachs of TD-SCDMA/HSDPA that many code channels transmit the efficiency of transmission of data by a relatively large margin.
Background technology
Along with popularizing of mobile phone, the data traffic requirement of communication user constantly increases.TD-SCDMA/HSDPA can support non-symmetrical service well, and is very effective to solving the ever-increasing data traffic requirement of mobile communication subscriber.HSDPA (high speed downlink packet access) technology is a kind of technology that provides the high-speed down data business at the multi-user, can satisfy the packet service that has burst characteristic in the down link, as flow data service, interactive application etc.Because the relative speech business of data service can be tolerated time delay, can tolerate that speed changes in short-term, so HSDPA normally adopts corresponding speed according to channel situation.For this reason, HSDPA has introduced a kind of new transmission channel high speed descending sharing channel (HS-DSCH) one by one, and the user shares descending sign indicating number resource and power resource, carries out time division multiplexing.Node B (Node B) is before emission, emission high-speed downstream control channel (HS-SCCH) notifies portable terminal (UE) some necessary parameter earlier, as UE-ID (being used to indicate the affiliated UE of current control information), TFRI (the assignment information that mainly comprises sign indicating number and time slot, the size of modulation scheme information and transmission block, be respectively applied for used code word and the residing time slot position of the indication current HS-PDSCH of UE, the modulation scheme of the next Transmission Time Interval data of sign HS-PDSCH is sizes of QPSK or 16QAM and transmission block thereof), HARQ (the procedural information that comprises HARQ, redundancy version information and new data indication information) etc. parameter.HS-SCCH is used to carry the physical layer that is used on the HS-DSCH decoding and controls signaling.Portable terminal is by reading the information on the HS-SCCH, can find HS-DSCH resource into this mobile terminal configuration according to physical layer information such as the code channel of the information appointment on the HS-SCCH, time slot, modulation systems.Portable terminal monitoring HS-SCCH checks whether send to own dot information, if having, then portable terminal begins to receive HS-DSCH, and carries out demodulation by the data that the information butt joint that the HS-DSCH that obtains upward disposes is received.
According to the physical layer specification in the 3GPP agreement, for certain UE (portable terminal), HS-PDSCH (high-speed physical downlink shared channel (HS-PDSCH)) adopts spreading factor (Spread Factor, SF) channel code of 16 and 1 (SF=16,1).And, allow the multiplexing and timeslot multiplex of sign indicating number at a HS-DSCH TTI (Transmission Time Interval), but on all time slots, spreading factor can only adopt 16 or 1, HS-PDSCH must adopt identical channelization code set, and this channelization code set must be a continuous dispensing.
According to the NBAP in the 3GPP agreement (Node B Application Part) standard, for certain sub-district, the configuration of HS-DSCH is finished by " Physical Shared Channel is reshuffled (PhysicalShared ChannelReconfiguration) " message.At control radio network controller (control radio networkcontroller, CRNC) send in " Physical Shared Channel reconfiguration request (PhysicalShared Channel Reconfiguration Request) " message of Node B (Node B), comprise information unit " HS-PDSCHTDD Information ", indicate Node B and can dispose the HS-DSCH physical channel on a plurality of code channels of a plurality of time slots, the channel code of each code channel adopts SF=16 or SF=1.Referring to Fig. 1, when adopting SF=16, Node B can distribute one or more channel code (transmission of many code channels) for certain UE (portable terminal) according to channel conditions and user's needs, reaching the transfer of data peak rate of realizing this UE, and conventional time slot (TS0-TS6) structure on each code channel is just the same.
Therefore, in the TD-SCDMA/HSDPA system, when many code channels transmit, network allocation is given a plurality of basic resource unit (Base Resource Unit of certain UE (portable terminal), BRU), be that code channel all is based upon on same frequency, the same time slot, these code channels have identical channel condition, all are the Midamble sign indicating number that same UE transmits 144 chip length that are used for channel estimating in this organizes each code channel in many code channels.Because UE only needs the Midamble sign indicating number on one of them code channel to finish channel estimating, estimated result can be used for fully to distributing to the processing of other code channel of this user in same frequency, the same time slot, therefore when distributing a plurality of continuous code channels to carry out many code channels when transmitting in the same time slot, each code channel in many code channels adopts duplicate time slot format, do not make full use of system resource, cause waste.
Application number is " improving the method for transmission rate in the multi-slot cdma wireless communication system " patent of invention of 03109756.1, though the method that adopts multi-slot to merge, the raising data transmission capabilities is arranged, reduce the code channel number or the maximum transmission power of terminal emission, enlarging the sub-district covers, reduce advantages such as power consumption, because the data framing form when not changing the transmission of many code channels, when having in same time slot a plurality of continuous code channels of distribution carry out many code channels transmission, each code channel in many code channels adopts duplicate time slot format, do not make full use of system resource, wasting shortcoming.Application number is " collocation method of the channel code of high-speed physical downlink shared channel (HS-PDSCH) " patent of invention of 200510130030.5, though solve the channel code configuration continuity of the HS-PDSCH of UE, reduced the complexity of the channel code of system configuration HS-PDSCH, but owing to be the code channel allocation strategy of many code channels transmission (in the same time slot or stride time slot), data framing form when equally whether changing the transmission of many code channels, when in same time slot, distributing a plurality of continuous code channels to carry out many code channels transmission, each code channel in many code channels adopts duplicate time slot format, do not make full use of system resource, wasting shortcoming.
Summary of the invention
The purpose of this invention is to provide the method that the many code channels of a kind of TD-SCDMA/HSDPA transmit.Adopt the inventive method, data framing form when in same time slot, having changed the code channel transmission, when the data framing that many code channels transmit, the Midamble sign indicating number that only keeps certain-length in the code channel in distributing to a plurality of code channels of user, Midamble code position in other code channels can be used for data symbol to be transmitted and is filled under the identical resource consumption condition, transmit more data, can make full use of the existing systems resource, improve systematic function and capacity.
The method of many yards transmission of TD-SCDMA/HSDPA of the present invention has following steps:
(1) set up the time slot format that many code channels transmit: when continuous many code channels transmit in a time slot, have only a code channel to comprise the midamble sign indicating number, other code channel does not comprise the midamble sign indicating number;
(2) network side configuration high-speed Physical Downlink Shared Channel on a plurality of descending time slots of each sub-district is being given the continuous channel code of distribution on the high-speed physical shared channel on each time slot;
(3) after the high-speed down ward grouped access resource that receives mobile terminal UE distributes the application request, the disposal ability and the business demand of portable terminal under the base station is judged, new many code channels transmission time slot form has been adopted by TFCI notice portable terminal in the base station; Otherwise original many code channels transmission time slot form has been adopted by TFCI notice portable terminal in the base station.Calculate and be this portable terminal distribution high-speed down ward grouped access resource according to current assignable resource information.
When in same time slot, carrying out continuous many code channels transmission, have only one of them code channel to comprise midamble sign indicating number (144 chips) among distributing to a plurality of code channels of same user, do not comprise the midamble sign indicating number in other code channels.
When carrying out the transmission of many code channels in the different time-gap, if during continuous code channel number 〉=2 in the time slot, a time slot of distributing in the described time slot among the user must comprise the midamble sign indicating number, and other time slot does not comprise the midamble sign indicating number; All have only a code channel in the time slot, then each code channel all must comprise the midamble sign indicating number.
When (on the same time slot) carries out the data framing of many code channels transmission in the TD-SCDMA/HSDPA system, the code channel of the Midamble sign indicating number that only to keep a length in a plurality of code channels of user be 144 chips, distribute in other code channels of this user and no longer transmit the Midamble sign indicating number, corresponding position can be used for transmitting data symbol, each code channel that does not transmit the Midamble sign indicating number can transmit 9 data symbols (code channel that transmits the Midamble sign indicating number can only transmit 44 data symbols) more, these code channels that do not transmit the Midamble sign indicating number all are used to data symbol to be transmitted and fill, the feasible data symbol that does not transmit the slot transmission of Midamble sign indicating number becomes 53 by 44, like this under identical resource consumption condition, more data be can transmit, resource utilization and systematic function improved.
In the TD-SCDMA/HSDPA system, network side is according to the ability and the free system resources situation of particular UE, determine whether to adopt time slot format of the present invention, if adopt, network side will be deleted the midamble sign indicating number in all code channels beyond first code channel, and fill its relevant position with data symbol waiting for transmission, thereby in the code channel of having deleted the midamble sign indicating number 9 symbols of many transmission.Distribute whole time slot for certain user, as the 4th time slot TS4 in certain wireless sub-frame, in the time of spreading factor SF=16, adopt the inventive method, only in being numbered 1 code channel, transmit the Midamble sign indicating number, and in being numbered these 15 code channels of 2～16 transmit 135 data symbols more, be equivalent to three code channels to this user's overabsorption; In other words, use method of the present invention, 16 code channels in the same time slot just can realize adopting the laser propagation effect of 19 code channels of traditional many code channels transfer scheme.
Adopt the inventive method, system loading to former communication system almost can be ignored, only need when suitable new time slot format condition satisfies, revise the data framing mode of network side simply, when terminal receives, the code channel of only distributing to from same time slot in a plurality of code channels of certain user that comprises the Midiable sign indicating number is estimated channel, all code channels that the result who estimates is used for this time slot is distributed to this user carry out input respectively, do not need to change the hardware and the configuration thereof of network side and end side, therefore have and realize easily the advantage that cost is low.
Description of drawings
Fig. 1 is conventional time slot format schematic diagram;
Fig. 2 is a time slot format schematic diagram of the present invention;
Fig. 3 is the flow chart of the embodiment of the invention.
Embodiment
Referring to Fig. 2 and Fig. 3.
Step 1
Network side is the configuration high-speed Physical Downlink Shared Channel on a plurality of descending time slots of each sub-district.Its collocation method is: the carrier information of the HS-PDSCH that control channel HS-SCCH/HS-SICH is indicated disposes by high-level signaling; The HS-PDSCH resource allocation process be divided into two the step carry out, the first step: RNC (radio network controller) is by NBAP (Node B application protocol) message application carrier resource, NodeB distributing carrier wave resource, HS-SCCH related and HS-SICH channel resource with each carrier wave, and the relevant resource of each carrier wave HARQ (mixed automatic repeat requests), and pass through the NBAP message feedback and give RNC, RNC sends to UE with the carrier resource allocation result by RRC (Radio Resource control) message.Second step: MAC-hs distributes the HS-PDSCH resource on each carrier wave in real time, and a pair of HS-SCCH and HS-SICH by the carrier wave association distribute.Giving the continuous channel code (distribution method is 200510130030.5 patents of invention referring to application number) of distribution on the high-speed physical shared channel on each time slot.
Step 2
After receiving the high-speed down ward grouped access resource distribution application request of mobile terminal UE, disposal ability of portable terminal under the base station is judged (corresponding message transmission rate is 64K, 128K or 384K etc.) and business demand are calculated and are this portable terminal distribution high-speed down ward grouped access resource according to current assignable resource information.Concrete calculation procedure is: the disposal ability and the business demand of affiliated portable terminal judged in the base station, and calculates the Resource Unit that can be assigned to affiliated portable terminal according to current assignable resource information; Judge further whether the allocatable resource units that calculates can be distributed in same time slot.In the time of spreading factor SF=16, data rate needs 8 code channels for 64Kbit/s the time, and data rate needs 16 code channels for 128Kbit/s the time, and data rate needs 48 code channels for 384Kbit/s the time; 1) (contains 8) more than 8 code channel can be used if having in certain time slot, then can in this time slot, distribute 8 code channels to realize the speed of 64Kbit/s for this user, otherwise can in the time slot that (contains two) more than two, distribute code channel for this user, no matter occur in above-mentioned two kinds of situations any, as long as satisfy in certain time slot for this user has distributed the continuous code channel that (contains two) more than two, just can adopt the time slot format of step 1; 2) if also have 16 code channels to use in certain time slot, then can in this time slot, distribute 16 code channels to realize the speed of 128Kbit/s for this user, otherwise can in the time slot that (contains two) more than two, distribute code channel for this user, no matter occur in above-mentioned two kinds of situations any, as long as satisfy in certain time slot for this user has distributed the continuous code channel that (contains two) more than two, just can adopt the time slot format of step 1; 3) if having 48 code channels to use in certain 3 time slot, then can in these 3 time slots, distribute 48 code channels to realize the speed of 384Kbit/s for this user, otherwise can in the time slot that (contains four) more than four, distribute code channel for this user, no matter occur in above-mentioned two kinds of situations any, as long as satisfy in certain time slot for this user has distributed the continuous code channel that (contains two) more than two, just can adopt the time slot format of step 1.It should be noted that the channel code that is assigned in each time slot must be continuous.
Step 3
When in certain time slot, having distributed the code channel that (to contain two) more than two continuous for the user, when carrying out the transmission of many code channels in the same time slot, must comprise length in first code channel is the midamble sign indicating number of 144chips, and the data symbol in this code channel will be 44; To not have the midamble sign indicating number and distribute in follow-up other continuous code channels of this user, the data symbol number in these code channels will be 53, set up the time slot format of many code channel transmission of the present invention, referring to Fig. 2; Many code channels transmission time slot form shown in Figure 3 has been adopted by TFCI notice portable terminal in the base station simultaneously; Otherwise original many code channels transmission time slot form has been adopted by TFCI notice portable terminal in the base station.
When adopting time slot format of the present invention, when carrying out the transmission of many code channels in the different time-gap, if continuous code channel number 〉=2 in certain time slot, first time slot of then distributing to this user in this time slot must comprise the midamble sign indicating number, second and after time slot do not comprise the midamble sign indicating number; If all have only a code channel in each time slot, then each code channel all must comprise the midamble sign indicating number.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the invention; when can doing a little change and improvement, so the present invention's protection range is as the criterion when looking the claim person of defining.
Claims (3)
1. the method that transmits of the many code channels of a TD-SCDMA/HSDPA is characterized in that following steps are arranged:
(1) set up the time slot format of many code channels transmission: when distributing a plurality of continuous code channels to transmit for certain user in a time slot, have only one of them code channel to comprise the midamble sign indicating number, other code channel does not comprise the midamble sign indicating number;
(2) network side configuration high-speed Physical Downlink Shared Channel on a plurality of descending time slots of each sub-district is being given the continuous channel code of distribution on the high-speed physical shared channel on each time slot;
(3) after the high-speed down ward grouped access resource that receives mobile terminal UE distributes the application request, the disposal ability and the business demand of portable terminal under the base station is judged, calculate and for this portable terminal distributes high-speed down ward grouped access resource, the base station is by the described many code channels transmission time slot of TFCI notice portable terminal employing step 1 form according to current assignable resource information; Otherwise original many code channels transmission time slot form has been adopted by TFCI notice portable terminal in the base station.
2. the method that the many code channels of TD-SCDMA/HSDPA according to claim 1 transmit, it is characterized in that: when in same time slot, carrying out continuous many code channels transmission, have only one of them code channel to comprise the midamble sign indicating number among distributing to a plurality of code channels of same user, do not comprise the midamble sign indicating number in other code channels.
3. the method that the many code channels of TD-SCDMA/HSDPA according to claim 1 transmit, it is characterized in that: when carrying out continuous many code channels transmission in the different time-gap, if when distributing to user's code channel number 〉=2 in the different time-gap, a code channel distributing to this user in the described different time-gap must comprise the midamble sign indicating number, and other code channel does not comprise the midamble sign indicating number; All have only one if distribute to user's code channel in the different time-gap, then this code channel must comprise the midamble sign indicating number.
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| WO2013165607A1 (en) * | 2012-04-30 | 2013-11-07 | Board Of Trustees Of Michigan State University | Novel bacillus amyloliquefaciens strain bac03 and methods of using same |
| CN114884572B (en) * | 2021-02-05 | 2024-02-13 | 中国科学技术大学 | Wireless frame structure based on indoor visible light networking system |
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| CN1738472A (en) * | 2005-07-18 | 2006-02-22 | 重庆邮电学院 | Dynamic channel distributing method in TD-SCDMA system |
| CN101047422A (en) * | 2007-04-30 | 2007-10-03 | 重庆重邮信科（集团）股份有限公司 | Method for implementing synchronous under code stage of time-division-synchronous CDMA system |
| CN101155378A (en) * | 2006-09-30 | 2008-04-02 | 中兴通讯股份有限公司 | Method for testing vector amplitude value of error under high speed ascending grouped access channel configuration |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1738472A (en) * | 2005-07-18 | 2006-02-22 | 重庆邮电学院 | Dynamic channel distributing method in TD-SCDMA system |
| CN101155378A (en) * | 2006-09-30 | 2008-04-02 | 中兴通讯股份有限公司 | Method for testing vector amplitude value of error under high speed ascending grouped access channel configuration |
| CN101047422A (en) * | 2007-04-30 | 2007-10-03 | 重庆重邮信科（集团）股份有限公司 | Method for implementing synchronous under code stage of time-division-synchronous CDMA system |
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