CN1274098C - Transmission method for high speed grouping busihess data based on TDD - Google Patents
Transmission method for high speed grouping busihess data based on TDD Download PDFInfo
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- CN1274098C CN1274098C CN 02120975 CN02120975A CN1274098C CN 1274098 C CN1274098 C CN 1274098C CN 02120975 CN02120975 CN 02120975 CN 02120975 A CN02120975 A CN 02120975A CN 1274098 C CN1274098 C CN 1274098C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1438—Negotiation of transmission parameters prior to communication
- H04L5/1453—Negotiation of transmission parameters prior to communication of modulation type
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0025—Transmission of mode-switching indication
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Abstract
The present invention discloses a time division duplex based transmission method for the data of high speed packet services. In the method, UE measures a downlink channel in a previous time frame; in the first time slot of a current time frame, the UE reports the signaling of the data requests (DRC) of a modulation mode and an encoding mode, which is determined according to measuring results and used for sending data, to a base station; in the second time slot and the subsequent time slots of the current time frame, one or multiple time slots of uplink services are planned according to the ratio of the uplink services to downlink services so that service data for uplink transmission by the UE is provided, wherein the uplink services and the downlink services are supported by actual requirements; after the time slots of the uplink services, pilot frequency time slots for uplink and downlink synchronization are planned; after the pilot frequency time slots, the base station informs the UE of getting ready for receiving the data of the downlink services; in one subsequent time slot or multiple subsequent time slots of the downlink services, the services of downlink data are offered to users according to the results dispatched by channel measurement, wherein the results are reported by the users. The proposal can enhance the performance of high-speed data transmission, increase the frequency spectrum efficiency of a system and reduce the operating cost.
Description
Technical field
The present invention relates to adopt the transmission method of the Packet data service in the wireless communication system of time division duplex (TDD) standard.
Background technology
At present, the method for the transfer of data of narration is in the 3GPP TS25.221 v4.6.0 chapters and sections 6.1: adopt the descending pilot frequency time slot (DwPTS) of 96 chips to realize the synchronous of descending reception; Use the uplink pilot time slot (UpPTS) that adds 96 chip guard periods (GP) to realize that up reception is synchronous; Provide the transmission service by the identical business time-slot of time span for the data of different user at last.The structure of time slot that said method adopts is with reference to figure 2, this Figure illustrates the subframe structure that a time span among the TD-SCDMA is fixed as 5ms, comprises 6400 chips.Among the figure, except being used to realize that (UpPTS) in addition, 7 remaining business time-slots comprise two ascending time slot TS1, TS2 and 5 descending time slot TS0, TS3, TS4, TS5, TS6 to three synchronous special time slots for DwPTS, GP, and its duration all be that 0.675ms grows.Wherein, first time slot (TS0) always divide be used in descending, second time slot (TS1) always divide be used in up.Except first up-downgoing switching point that is positioned at GP, also there be second unfixed up-downgoing switching point in TD-SCDMA, so that realize the setting of up-downgoing ratio flexibly, supports symmetry and asymmetrical up-downgoing business.In Fig. 2, second up-downgoing switching point has been arranged between the 3rd time slot (TS2) and the 4th time slot (TS3), thereby can support that the up-downgoing ratio is 2: 5 a non-symmetrical service.
In the TD-SCDMA system, support data transmission and the reception that a plurality of users adopt the mode of code division multiple access (CDMA) to walk abreast in each time slot.Each structure of time slot in the frame shown in Figure 2 as shown in Figure 3, contains one the 144 long middle pilot tone of chip with reference to figure 3 in each time slot.Because each time slot all is an absolute construction, and each time slot all is provided with independent pilot tone, the different user signal is realized the multiplexing of channel in the same time slot except utilizing different spreading codes, also can be distributed in different time-gap and carry out time division multiplexing, thereby avoided interference each other as much as possible, improved the quality of telex network.Therefore, the communication mode of existing TD-SCDMA is a kind of communication mode preferably for the speech business of low rate, helps the realization of multi-user by CDMA mode parallel receive speech business data.
When adopting aforesaid way to carry out the transmission of user data service,, can not cause the waste of frequency spectrum when adopting the TDD mode to support non-symmetrical service, thereby the TDD mode is more suitable for supporting high-speed packet data service because same frequency range is adopted in up-downgoing.Yet, existing based on the TD-SCDMA subframe structure data transfer mode and be unfavorable for the transmission of high speed grouping busihess data, under this subframe structure design, the sequential relationship of high speed data transfer is with reference to figure 4.Among Fig. 4, after channel quality reports,, after the high speed business Data Receiving, kept the processing time of 5ms for base station (Node-B) scheduling has kept 2.7ms.According to this time slot relation, the user carries out in subframe n-1 in that the mass measurement that subframe n reports is actual, and the actual transmissions of high-speed data can only be carried out in subframe n+1, and the time delay between the two has surpassed a subframe, i.e. the time of 5ms.Under other schedulings, the time delay between the two may be longer.Because wireless fading channel changes very fast, the time delay growth means that the difference of the two interchannel also becomes greatly, causes the reduction of the high-speed packet data service efficiency of transmission and the availability of frequency spectrum.
Summary of the invention
The object of the present invention is to provide a kind of transmission method of the high speed grouping busihess data based on time division duplex, use this method to have the efficiency of transmission and the availability of frequency spectrum of higher high speed grouping busihess data.
For achieving the above object, the transmission method of the high speed grouping busihess data based on time division duplex provided by the invention comprises:
A. at the last time frame of current time frame, subscriber equipment (UE) carries out the measurement of down channel;
B. at first time slot of current time frame, subscriber equipment reports modulation, coded system request of data (DRC, the DATARequest Channel) signaling that is adopted according to the definite transmission data of above-mentioned measurement result to the base station;
C. at second time slot and the later time slot of current time frame, the up-downgoing business proportion of Zhi Chiing is arranged one or more uplink service time slots according to actual needs, and UE is provided up transmitting business data;
D. after the uplink service time slot of present frame, arrange independent up-downgoing synchronization slot;
E. behind the up-downgoing synchronization slot of present frame, arrange descending time slot, notify the user to prepare to receive, and after the downlink business time slot in carry out downlink service data and launch.
Described step c also comprises:
Subscriber equipment is receiving the base station when permitting up transmissions business, adopt the coded system request of data signaling (DRC) that reports in the previous time frame up-high speed grouping busihess data is modulated and to be encoded, the base station receives processing according to the coded system request of data signaling (DRC) that the UE that receives in the previous time frame reports to user data simultaneously.
The base station is when receiving the UE uplink business data, and the coded system request of data signaling (DRC) that the base station reports according to a plurality of UE simultaneously carries out that high-speed data is up, the scheduling of downlink.
At the reception processing of process uplink service and first time slot after the uplink and downlink synchronization slot time period, the base station comprises the reception parameter of mixed automatic retransmission request (H-ARQ) information to notification of user equipment, the base station receives indication (fast receptionindicator) fast in this time slot broadcasting simultaneously, notifies the subsequent timeslot of this time slot to be assigned to which subscriber equipment.
The business time-slot that links to each other behind the reception processing of passing through uplink service and first time slot after the uplink and downlink synchronization slot time period, base station are assigned to the UE emission high speed grouping busihess data of this time slot to the scheduling result according to the down high-speed data transmission.
Because the delay between the time that the present invention measures actual channel and the time of transmitting high speed business datum is controlled in the time frame, mainly compare with existing based on the data transmission method of speech business, can optimize reporting of user channel measurement result's efficient, thereby improve the performance and the system spectral efficiency of high speed data transfer, cut operating costs.
Description of drawings
Fig. 1 is the flow chart of the method for the invention;
Fig. 2 is the frame assumption diagram of TD-SCDMA system;
Fig. 3 is the structure of time slot figure that Fig. 2 frame structure comprises;
Fig. 4 is the existing high speed data transfer sequential chart of TD-SCDMA system;
Fig. 5 is the frame assumption diagram that the described method of Fig. 1 adopts;
Fig. 6 is that the described method of Fig. 1 is carried out sequential chart;
Fig. 7 is the frame structure exemplary plot of the described method of Fig. 1 when specifically using.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the flow chart of the method for the invention, and the frame structure that the described method of Fig. 1 adopts is with reference to figure 5.The described method of Fig. 1 is a unit with a time frame, adopts time division way transmission uplink and downlink high-speed packet data service.At first carry out the measurement of down channel at step 1UE, this step specifically can be carried out down channel estimation realization according to down public guide frequency or the descending synchronous code that the base station sends.The measurement of supposing down channel is that UE finishes in previous time frame, then UE carry out step 2, first time slot in current time frame shown in Figure 5, it is the TS0 time slot, report modulation, coded system request of data (DRC, the DATARequest Channel) signaling that is adopted according to the definite transmission data of step 1 measurement result to the base station.Then carry out step 3, the base station is at second time slot and the later time slot of current time frame, promptly at TS1 time slot and later time slot, and the up-downgoing business proportion of Zhi Chiing according to actual needs, arrange one or more uplink service time slots, user uplink transmitting business data are provided.Carry out step 4, after the uplink service time slot of present frame, arrange independent up-downgoing synchronization slot.Carry out step 5 at last, behind the up-downgoing synchronization slot of present frame, arranges descending time slot, notify the user to prepare to receive, and after the downlink business time slot in carry out downlink service data and launch.
Because same frequency range is adopted in up-downgoing, therefore TS1 with and subsequent the uplink service time slot in, therefore in step 3, when UE permits up when sending professional signaling receiving the base station, adopt the DRC signaling that reports in the previous time frame upstream packet business datum is modulated and to encode, the base station then reports signaling that user data is received processing according to the DRC of the UE that receives in the previous time frame.
When the base station received the user uplink business datum, the DRC that the base station reports according to a plurality of UE simultaneously dispatched, and comprises the emission of down high-speed data is dispatched and the emission of up-high speed data is dispatched.In the reception processing of process uplink service and after the uplink and downlink synchronization slot time period, at descending time slot TS n, the base station comprises the reception parameter of mixed automatic retransmission request (H-ARQ) information to notification of user equipment, the base station receives indication (fast reception indicator) fast in this time slot broadcasting simultaneously, notifies the subsequent timeslot of this time slot to be assigned to which subscriber equipment.The business time-slot that behind the reception processing of passing through uplink service and first time slot after the uplink and downlink synchronization slot time period, links to each other, promptly at the business time-slot TS n+1 that links to each other thereafter, the base station is assigned to the UE emission high speed grouping busihess data of this time slot to the scheduling result according to the down high-speed data transmission, because the later downlink business time slot of TS n+1 has the sufficient time to handle the reception parameter that receives in time slot TS n, thereby can not notify by quick reception indication.Last UE after handling the down high speed business datum, after the TS0 time slot of time frame report the affirmation signaling that whether correctly receives data.
The execution sequential relationship of such scheme is with reference to figure 6.
Fig. 7 is the frame structure exemplary plot of the described method of Fig. 1 when specifically using.In this was used, time frame had adopted the configuration of the 5ms subframe of TD-SCDMA system, and number of chips is 6400 chips.Continue the transmitting downstream synchronous code in the downlink synchronization slot of base station before the TS2 time slot, be used for UE and realize down-going synchronous.The broadcasting of sub-district is launched in the TS2 time slot, and UE can easily receive broadcast message in the time slot behind downlink synchronization slot, thereby obtain some information of relevant cell configuration after realizing down-going synchronous.
Asymmetric for the up-downgoing of supporting Packet data service, the time span of uplink service time slot TS1 can be carried out flexible configuration according to actual conditions.This configuration information is broadcasted in time slot TS2, so UE can find TS0 time slots section according to broadcast message.
When the up-downgoing high-speed packet data service is provided, UE at first carries out channel estimating according to the down public guide frequency among Fig. 7, and modulation, the coded system that should adopt when obtaining transmitting grouped data thus, then above-mentioned modulation, coded system are reported the base station with the signaling of agreement at the TS0 of back to back 5ms frame time slot.Modulation, coded system that the base station reports according to a plurality of UE are dispatched; finish traffic control (being no more than the total time length of the protection period between TS1 time slot, uplink synchronous time slot, downlink synchronization slot and two synchronization slots running time of described traffic control) before the TS2 time slot; at the TS2 time slot, corresponding UE is given with the result notification of scheduled for executing in the base station then.In period, the UE that is assigned to the TS3 time slot finishes the demodulation of call parameter, decoding work at first down public guide frequency shown in Figure 7; Perhaps the base station utilizes descending quick reception indication (fast reception indicator) this UE of fast notification to carry out the reception of TS3 time slot high-speed data at the TS2 time slot.The UE that is assigned to the TS4 time slot then finishes the reception work of call parameter in the time period at TS3, and after obtaining parameter, begin to receive the down high speed grouped data at the TS4 time slot.
The base station also needs to carry out the scheduling of upstream packet business receiving UE after modulation that the TS0 time slot reports, demodulation mode.This scheduling result is also at TS2 time slot notice UE.Because base station and UE have known modulation, coded system that the HRPD (high rate packet data) emission is adopted, therefore the signaling that needs UE to receive fast has only the allocation result (being assigned to the descending and up emission which UE carries out high-speed data) of TS3 and TS1 time slot, and remaining parameter then has the sufficient time to handle.
Obtain the TS1 time slot allocation result of base station notice at TS2 after, the UE that is assigned to this time slot is in the TS1 of back to back 5ms frame time slot, the up emission HRPD (high rate packet data) of modulation, coded system that employing reports at the TS0 of previous 5ms frame time slot, base station are then carried out corresponding reception operation.
Whether UE and base station send confirmation at TS0 and TS2 respectively after handling corresponding high-speed packet reception data, need to retransmit with informing base station and UE.
Claims (5)
1, a kind of transmission method of the high speed grouping busihess data based on time division duplex comprises:
A. at the last time frame of current time frame, user equipment (UE) carries out the measurement of down channel;
B. at first time slot of current time frame, subscriber equipment reports modulation, the coded system request of data signaling DRC that is adopted according to the definite transmission data of above-mentioned measurement result to the base station;
C. at second time slot and the later time slot of current time frame, the up-downgoing business proportion of Zhi Chiing is arranged one or more uplink service time slots according to actual needs, provides subscriber equipment up transmitting business data;
D. after the uplink service time slot of present frame, arrange independent up-downgoing synchronization slot;
E. behind the up-downgoing synchronization slot of present frame, arrange descending time slot, notify the user to prepare to receive, and after the downlink business time slot in carry out downlink service data and launch.
2, the transmission method of high speed grouping busihess data according to claim 1, it is characterized in that described step c also comprises: subscriber equipment is receiving the base station when permitting up transmissions business, adopt the coded system request of data signaling DRC that reports in the previous time frame that the up-high speed grouping busihess data is modulated and encode, the base station receives processing according to the coded system request of data signaling DRC that the UE that receives in the previous time frame reports to user data simultaneously.
3, the transmission method of high speed grouping busihess data according to claim 2, it is characterized in that described step c also comprises: the base station is when receiving the subscriber equipment uplink business data, and the base station carries out according to the coded system request of data signaling DRC of a plurality of user equipment to report simultaneously that high-speed data is up, the scheduling of downlink.
4, the transmission method of high speed grouping busihess data according to claim 3, it is characterized in that described step c also comprises: at the reception processing of process uplink service and first time slot after the uplink and downlink synchronization slot time period, the base station comprises the reception parameter of mixed automatic retransmission request H-ARQ information to notification of user equipment, the base station receives indication fast in this time slot broadcasting simultaneously, notifies the subsequent timeslot of this time slot to be assigned to which subscriber equipment.
5, the transmission method of high speed grouping busihess data according to claim 4, it is characterized in that described step c also comprises: the business time-slot that links to each other behind the reception processing of passing through uplink service and first time slot after the uplink and downlink synchronization slot time period, base station are assigned to the subscriber equipment emission high speed grouping busihess data of this time slot to the scheduling result according to the down high-speed data transmission.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02120975 CN1274098C (en) | 2002-06-06 | 2002-06-06 | Transmission method for high speed grouping busihess data based on TDD |
| AU2003273892A AU2003273892A1 (en) | 2002-06-06 | 2003-01-27 | A data trasmission method for high-speed packet traffic based on the tdd |
| PCT/CN2003/000084 WO2003105395A1 (en) | 2002-06-06 | 2003-01-27 | A data trasmission method for high-speed packet traffic based on the tdd |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02120975 CN1274098C (en) | 2002-06-06 | 2002-06-06 | Transmission method for high speed grouping busihess data based on TDD |
Publications (2)
| Publication Number | Publication Date |
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| CN1466286A CN1466286A (en) | 2004-01-07 |
| CN1274098C true CN1274098C (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02120975 Expired - Fee Related CN1274098C (en) | 2002-06-06 | 2002-06-06 | Transmission method for high speed grouping busihess data based on TDD |
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| Country | Link |
|---|---|
| CN (1) | CN1274098C (en) |
| AU (1) | AU2003273892A1 (en) |
| WO (1) | WO2003105395A1 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741423A (en) * | 2004-08-23 | 2006-03-01 | 大唐移动通信设备有限公司 | Method for eliminating interference of downgoing pilot channel |
| WO2006022424A1 (en) * | 2004-08-27 | 2006-03-02 | Matsushita Electric Industrial Co., Ltd. | Transmission schedule constructing apparatus |
| CN1855767B (en) * | 2005-04-18 | 2010-10-06 | 大唐移动通信设备有限公司 | Method for establishing cells with large radius in CDMA communication system synchronized by time division synchronizing codes |
| CN1889759B (en) * | 2005-06-27 | 2010-05-05 | 上海原动力通信科技有限公司 | Method for supporting multi-frequency point data receiving in high-speed down group |
| CN100555930C (en) * | 2005-07-04 | 2009-10-28 | 上海原动力通信科技有限公司 | The channel establishing method of multi-carrier HSDPA and multi-carrier downlink group data transmission method |
| CN1909533B (en) * | 2005-08-05 | 2010-10-06 | 中兴通讯股份有限公司 | Frame creating method based on crossing frequency division multiplexing in time-division duplex mode |
| CN1941669B (en) * | 2005-09-29 | 2012-07-25 | 上海原动力通信科技有限公司 | Method for inserting down public guide frequency |
| CN101026429B (en) * | 2006-02-17 | 2010-11-10 | 华为技术有限公司 | Method for distributing high speed downlink sharing channels for multi carrier user device |
| CN101479973B (en) * | 2006-07-06 | 2012-06-27 | 北京清深技术开发中心有限公司 | A time division multiplexing method and system |
| WO2008019534A1 (en) * | 2006-08-11 | 2008-02-21 | Utstarcom Telecom Co., Ltd. | Method for node b obtaining the channel quality information in tdd hsdpa system |
| CN101137135B (en) | 2006-09-01 | 2011-06-29 | 电信科学技术研究院 | Base station and method for transmitting control scheduling information |
| CN101212243B (en) * | 2006-12-30 | 2011-08-24 | 中兴通讯股份有限公司 | Method and system for uplink power control in time division duplex feedback enhanced system |
| CN101034964B (en) * | 2007-04-16 | 2011-04-06 | 华为技术有限公司 | Downlink data transmission method, system and base station |
| CN101374011B (en) * | 2007-08-20 | 2012-11-28 | 中兴通讯股份有限公司 | Method for implementing critical frequency coexist between two different communication systems and physical layer frame structure |
| CN101374012B (en) * | 2007-08-20 | 2013-02-27 | 中兴通讯股份有限公司 | Wireless transmission method for TDD OFDM system and physical layer frame structure |
| US8081984B2 (en) | 2008-04-30 | 2011-12-20 | Telefonaktiebolaget L M Ericsson (Publ) | UL/DL scheduling for full bandwidth utilization |
| CN101610578B (en) * | 2008-06-20 | 2011-06-01 | 展讯通信（上海）有限公司 | Method and system for avoiding receiving and sending interference |
| CN102014514B (en) * | 2009-11-10 | 2014-01-15 | 电信科学技术研究院 | Method and equipment for obtaining duplex system information of user equipment |
| CN104486013B (en) | 2014-12-19 | 2017-01-04 | 宇龙计算机通信科技(深圳)有限公司 | Channel detection method, Channel Detection system, terminal and base station |
| CN105636233B (en) * | 2015-12-11 | 2018-11-02 | 山东闻远通信技术有限公司 | The LBT methods of uplink downlink are considered in a kind of LAA systems simultaneously |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6973067B1 (en) * | 1998-11-24 | 2005-12-06 | Telefonaktiebolaget L M Ericsson (Publ) | Multi-media protocol for slot-based communication systems |
| US7020071B2 (en) * | 1998-11-25 | 2006-03-28 | Lucent Technologies Inc. | Methods and apparatus for wireless communication using orthogonal frequency division multiplexing |
| AU5920000A (en) * | 1999-07-09 | 2001-02-13 | Malibu Networks, Inc. | Method for transmission control protocol (tcp) rate control with link-layer acknowledgements in a wireless point to multi-point (ptmp) transmission system |
| DE10008653A1 (en) * | 2000-02-24 | 2001-09-06 | Siemens Ag | Improvements in a radio communication system |
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2002
- 2002-06-06 CN CN 02120975 patent/CN1274098C/en not_active Expired - Fee Related
-
2003
- 2003-01-27 AU AU2003273892A patent/AU2003273892A1/en not_active Abandoned
- 2003-01-27 WO PCT/CN2003/000084 patent/WO2003105395A1/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003105395A1 (en) | 2003-12-18 |
| AU2003273892A1 (en) | 2003-12-22 |
| CN1466286A (en) | 2004-01-07 |
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