WO2004093361A1 - Procede permettant d'accelerer la transmission dans un systeme de communications sans fil amrc multi-fentes - Google Patents
Procede permettant d'accelerer la transmission dans un systeme de communications sans fil amrc multi-fentesInfo
- Publication number
- WO2004093361A1 WO2004093361A1 PCT/CN2004/000359 CN2004000359W WO2004093361A1 WO 2004093361 A1 WO2004093361 A1 WO 2004093361A1 CN 2004000359 W CN2004000359 W CN 2004000359W WO 2004093361 A1 WO2004093361 A1 WO 2004093361A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- slot
- service data
- length
- chips
- communication system
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7105—Joint detection techniques, e.g. linear detectors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2618—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using hybrid code-time division multiple access [CDMA-TDMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
- H04B7/264—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] for data rate control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70703—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation using multiple or variable rates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to wireless mobile communication technology, and more particularly, to a method for improving the transmission rate in a multi-slot code division multiple access (QMA) wireless communication system.
- QMA code division multiple access
- CDMA TDD a method of mobile communication system performance.
- Each subframe with a length of 5ras is composed of 7 main time slots, including: TS0 (10), TS1 (11), TS2 (12), TS3 (13), TS4 (14), TS5 (15), TS6 (16) and 3 special time slots: downlink pilot time slot DwPTS (17), guard time slot G (18), and uplink pilot time slot UpPTS (19).
- the width of each main time slot is 675 s, for a total of 864 chips.
- Each main time slot is further divided into four areas: a service data area Data (20, 22), a middle code area Midamble (21), and an inter-time slot protection area g (23).
- the mid-code area Mid ble () is 144 chips long
- the time slot protection area g is 16 chips long
- the two service data areas before and after each are 352 chips long.
- the spreading factor is 16
- two regions of each service data symbols 22 may be transmitted in quadrature phase shift keying (QPS) modulation rate equivalent to 17.6kbps 0
- QPS quadrature phase shift keying
- Using multi-slot transmission 56. 2 kbps can be transmitted using two time slots, 844.8 kbps can be transmitted using 3 time slots, and so on.
- the current third-generation mobile communication system uses the CDMA method.
- CLA standard of time division duplex
- a multi-slot structure is used; in order to provide high-speed data services, Techniques such as variable spreading coefficients, multiple code channels or multiple time slots.
- TDD technology UTRA TDD and TD-SC Li A
- Due to the complexity of the joint detection technology algorithm currently designed user terminals can only perform multi-user detection on signals of one time slot, so they support receiving signals of one time slot at most, or relatively inexpensive user terminals usually support the highest 128 (or 144) kbps data services.
- the processing capacity of the chip has been increased exponentially, and greater power consumption and more expensive costs are inevitably required to obtain greater processing power. Therefore, to solve the problem of multi-slot operation, the promotion and application of products is another urgent problem that needs to be solved;
- the transmission power required when using a low spreading factor or using multiple code channels to transmit one service data is compared with the transmission power required when a single code channel uses a higher spreading factor. The latter relationship is multiplied. If the maximum transmission power of the user terminal is fixed, the communication distance will be reduced, and the cell coverage area will be reduced. If the user terminal has sufficient transmission power, the power consumption will increase, which shortens the battery life of the user terminal.
- the purpose of the present invention is to provide a method for increasing the transmission rate in a multi-slot CDMA wireless communication system. While improving the user data transmission capability, the number of code channels occupied by the user terminal during transmission is reduced, or the maximum transmission power is reduced. In order to expand cell coverage and reduce power consumption, it can also reduce the requirements for terminal demodulation complexity and reduce user terminal costs.
- a method for increasing a transmission rate in a multi-slot CDMA wireless communication system which is characterized by including the following steps:
- the combined time slot includes at least one service data area and a protection area. Modulation method adopted by the slot;
- service data may be transmitted by using the front and rear service data areas with similar lengths; An intermediate code area is set in the front and rear service data intervals to improve the transmission performance of the system.
- service data may be transmitted by using two or more service data areas with similar lengths; and one or more intermediate codes used to improve system transmission performance are distinguished and set in the service data interval.
- the length of the intermediate code region increases as the number of adjacent time slots participating in the merging increases.
- two adjacent time slots may be combined into a double time slot, and service data areas with lengths of 720 chips and 736 chips, respectively, are used to transmit service data, and are used to When the frequency coefficient is 16, an integer number of symbols can be provided, and a middle code area with a length of 256 chips and an inter-slot protection area with a length of 16 chips are used.
- three adjacent time slots may be combined into a three times time slot, and two service data areas with a length of 1152 chips and a 1168 chip are used to transmit service data, and are used to expand the service data.
- the frequency coefficient is 16
- an integer number of symbols can be provided, and a middle code area with a length of 256 chips and an inter-slot protection area with a length of 16 chips are used.
- the service data 5 is transmitted in two service data areas with lengths of 1456 chips and 1472 chips, respectively.
- the frequency coefficient is 16
- an integer number of symbols can be provided, and an intermediate code area with a length of 512 chips and an inter-slot protection area with a length of 16 chips are used.
- modulation modes including QPSK, 8PSK, 16QAM, and 64QAM can be used in the combined time slot.
- the TS1, TS2, and TS3 time slots of a time division-synchronous code division multiple access mobile communication system standard can be combined into a triple timeslot to transmit uplink service data; the TS4, TS5, and TS6 timeslots are combined into a triple timeslot, Transmission of downlink service data, using 16QAM modulation, not used Channel coding, transmitting bidirectional 2Mbps service data.
- Disclosed in the present invention is a new multi-slot combination technology. By combining two or more time slots into one large time slot, the large multi-time slot can be used (or not used).
- the method for improving the data transmission rate in a multi-slot CDMA wireless communication system can improve the data transmission efficiency of the multi-slot CDMA TDD system by 3% to 10%; it solves the problem of using a single-slot transmission in the TD-SCDMA system at 384kbps Difficulties in service and 2 Mbps service; It is possible to use user terminal equipment to receive high-speed digital signals when only using single-slot reception; simplify the user terminal design, reduce the power consumption of the user terminal, and expand cell coverage.
- Figure 1 is a schematic diagram of the frame structure of a TD-SCDMA wireless mobile communication system
- FIG. 2 is a schematic diagram of a structure of a double timeslot implemented by using the method of the present invention
- FIG. 3 is a schematic diagram of a multi-slot combining structure implemented by using the method of the present invention
- FIG. 4 is a schematic diagram of another multi-slot combination structure implemented by using the method of the present invention
- FIG. 5 is a schematic diagram of a frame structure when a 2 Mbps service is transmitted using 3 times timeslots implemented by the method of the present invention.
- the present invention achieves the purpose of increasing the data transmission rate by adopting a new frame structure and a provided usage method.
- a higher data rate needs to be transmitted (such as transmitting a voice with a rate of 12.2kbps)
- the existing one is not used, such as reducing the expansion Frequency coefficient (reduced from 16 to 8) or a method of transmitting a data service by using two code channels, instead, adjacent time slots are combined into a larger time slot for data transmission.
- a frame structure when two adjacent time slots are combined into one relatively large time slot (called a double time slot).
- the original frame structure (100) includes two adjacent time slots (one code channel each), and each time slot is composed of a data service area (130, 120), a middle code area (110), and a protection time slot area g (140).
- the chip lengths are 352, 352, 144, and 16 chips.
- the new frame structure is also composed of a service data area (210, 230), a middle code area (220), and a guard time slot area g (240).
- the chip lengths are 720, 736, 256, and 16 chips, respectively.
- the width of this new time slot is twice the width of the original time slot.
- a direct sequence spread spectrum multiple access method with a maximum spreading factor of 16 can be used.
- the new frame keeps the same total number of chips as the original two adjacent frames, which is 1728 chips.
- the length of the service data area before and after should be basically the same.
- the recommended intermediate code length for double timeslots is 256 chips. The shorter the length, the higher the transmission efficiency but the worse the performance. The lower the efficiency, the better the performance.
- the length of the guard slot area g is still 16 chips.
- three adjacent time slots 201, 202, and 203 are combined into one larger time slot 300 (referred to as a three timeslot), or four adjacent time slots 204, 205, 206, and 207 are combined. It is a structure with a larger time slot 400 (called 4 times timeslot), and the length of this 3 times timeslot and 4 times timeslot (new timeslot after merging) is 3 times and 4 times the length of the original timeslot. Times, the direct sequence spread spectrum multiple access method with a maximum spreading factor of 16 is still used.
- the new timeslots of 3 times timeslots include the front and rear service data areas 321 and 322 of length 1152, 1168 chips, the middle code area 325 of length 256 chips, and the protection time slot area of 16 chips ( g) 323.
- the new timeslot of 4 times timeslots includes front and rear service data areas 331 and 332 of length 1456 and 1472 chips, a middle code area 333 of length 512 chips and a protection time slot area of 16 chips ( g) 334.
- the original frame structure (100) is one code channel in each of two adjacent time slots in FIG. 1; and the frame structure (200, 300, 400) of the present invention is a combination of two Three or four adjacent time slot code channels are combined into one large time slot, and any one code channel is also composed of four areas: service data area (210, 230, 321, 322, 331, 332), middle code Area (220, 325, 333) and time slot protection area g (240, 323, 334). Due to the increase in the data area, in order to ensure system performance, the length of the intermediate code must be increased accordingly. At 2 times timeslots (Figure 2), the proposal for this intermediate code length is 256chip, at 3 times timeslots and 4 times times. During the gap, the recommendations for this intermediate code length are 256 and 512chip, respectively. Of course, this length can be changed to other values according to the system energy requirements.
- each code channel can provide 91 symbols, and 45 and 46 symbols can be arranged in the two service data areas (210, 230), respectively.
- the data rate of 36.4 kbps can be transmitted in the QPSK modulation mode, which is very suitable for the 3GPP typical 12.
- the benefits brought by this time are: the amount of transmitted business data has increased by 3.2%; the required transmission power has been reduced by half; under the same transmission power, the communication distance has increased (the specific increase will depend on the working environment) Changes).
- the method of the present invention can be used to further combine more time slots into a larger time slot still composed of a service data area, a middle code area, and a protection time slot area. Instead of using the original multi-slot method.
- the intermediate code (325) can adopt the length of the intermediate codes (220) of 2 timeslots (200) in FIG. 2, so that the capacity of the service data area (321, 322) is again Can be increased.
- the length of the intermediate code (333) must be longer.
- each code channel When using a 3 timeslot (300) as shown in FIG. 3, with a spreading factor of 16, each code channel can support 145 symbols, and can be divided into two service data areas (321, 322). Don't arrange 72 and 73 symbols.
- each large code channel (3 times the code channel) can provide a data rate of 58 kbps; this 3 timeslot can provide a total data rate of 928 kbps, which is 10% higher than the original technology.
- each code channel can support 183 symbols. 91 and 92 symbols can be arranged in two service data areas (331, 332), respectively.
- each large code channel (4 times the code channel) can provide a data transmission rate of 73.2 kbps; this 4 timeslot can provide a total data transmission rate of 1. 17 Mbps.
- the positions of the intermediate codes in the combined time slot are all located in the middle of the time slot, and there is only one, but it may not be arranged in the implementation, that is, the intermediate code area may not be in the middle of the combined time slot, and There can be multiple.
- FIG. 4 Another multi-slot frame structure.
- three timeslots 201, 202, and 203 are combined into a three timeslot 350, and two intermediate code areas (365) with a length of 128 chips are arranged, and the other four data service areas (361, 362, 363, 364) ) To transmit service data, and there is a guard slot area g (373).
- the 4 timeslot (450) also arranges two intermediate code areas (433) with a length of 256 chips, and the other four data service areas (431, 432, 434, 435) transmit service data.
- the data transmission efficiency is the same as the embodiment shown in FIG. 3, but because two intermediate codes are used, the ability to overcome multipath and fast fading is increased, and the complexity of data processing is also brought.
- the length of the intermediate code area also increases as the number of adjacent time slots participating in the merging increases.
- the method of the present invention can also be used to combine more adjacent time slots to form
- the method of the present invention also provides convenience for using a relatively high-order modulation mode in certain time slots.
- the data transmission rate per code channel will reach 54.6kbps, which is 50% higher than the QPSK modulation method; 16QAM modulation is used Mode, the data transmission rate per code channel will reach 72.8 kbps, which is doubled compared to the use of QPSK modulation; while using 64QAM modulation, the data transmission rate per code channel will reach 145.6 kbps, which is more than using QPSK modulation. Doubled.
- the method of the present invention can further increase the transmission rate.
- a three timeslot (300) shown in FIG. 3 and a modulation method using 16QAM are used, and the middle code of the three timeslot in FIG. 3 is removed.
- the length of this service data area is 2, 576ch i p, and the total data rate that can be transmitted is 2. 061Mbps. In this way, when transmitting 2. 048 Mbps services, it is also capable of transmitting 12 kbps associated signaling.
- three time slots (such as TS 1, TS2, and TS 3) can be combined into a three times timeslot as shown in FIG. 5 for uplink transmission; three time slots (such as TS4, TS5, and TS6) are combined into three times timeslots as shown in FIG. 5 for downlink transmission, which can realize simultaneous transmission of 2Mbps services in both directions, which is a great improvement over the original unidirectional transmission of 2Mbps services.
- the merging process can all be implemented by software technology.
- the length of the combined time slot is an integer multiple of the length of the original time slot; the combined time slot can be used similarly to the original time slot.
- Time slot structure, where the length of the intermediate code changes with the combined time slot length Change, and the length of the protection area can be unchanged; in this combined time slot, a higher modulation mode can still be used to improve the data transmission rate.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04727497.2A EP1619814B1 (en) | 2003-04-15 | 2004-04-15 | Method for improving the transmission speed in multi-slot cdma wireless communication system |
US11/252,047 US7586883B2 (en) | 2003-04-15 | 2005-10-17 | Method for improving the transmission speed in multi-slot CDMA wireless communication system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN03109756.1 | 2003-04-15 | ||
CNB031097561A CN100486144C (zh) | 2003-04-15 | 2003-04-15 | 多时隙cdma无线通信系统中提高传输速率的方法 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/252,047 Continuation US7586883B2 (en) | 2003-04-15 | 2005-10-17 | Method for improving the transmission speed in multi-slot CDMA wireless communication system |
Publications (1)
Publication Number | Publication Date |
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WO2004093361A1 true WO2004093361A1 (fr) | 2004-10-28 |
Family
ID=33163869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2004/000359 WO2004093361A1 (fr) | 2003-04-15 | 2004-04-15 | Procede permettant d'accelerer la transmission dans un systeme de communications sans fil amrc multi-fentes |
Country Status (4)
Country | Link |
---|---|
US (1) | US7586883B2 (zh) |
EP (1) | EP1619814B1 (zh) |
CN (1) | CN100486144C (zh) |
WO (1) | WO2004093361A1 (zh) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1832378B (zh) * | 2005-03-11 | 2011-05-11 | 大唐移动通信设备有限公司 | 宽带tdd系统使用高效高性能帧结构进行无线传输的方法 |
US7916710B2 (en) * | 2006-11-02 | 2011-03-29 | Nokia Corporation | Method, device, system and software product for alternative time division duplex frame structure optimization |
CN101584137A (zh) * | 2007-01-16 | 2009-11-18 | 艾利森电话股份有限公司 | 蜂窝无线tdd系统中增强性能的方法和设备 |
DE602007010670D1 (de) * | 2007-02-23 | 2010-12-30 | Ericsson Telefon Ab L M | Verfahren für erweiterte leistungsfähigkeit in einem zellulären drahtlosen zeitmultiplex (tdd) system |
CN101316115B (zh) * | 2007-05-31 | 2015-02-18 | 电信科学技术研究院 | 导频序列信号的检测方法、设备及系统 |
EP2216915B1 (en) * | 2007-11-02 | 2013-09-04 | China Academy of Telecommunications Technology | Time division duplexing data transmission |
CN101541080B (zh) * | 2008-03-20 | 2012-01-11 | 中兴通讯股份有限公司 | 一种时分双工系统中寻呼信号发送方法 |
CN101998233B (zh) * | 2009-08-18 | 2014-11-05 | 中兴通讯股份有限公司 | 支持部署Femto基站的通信系统中终端位置更新的方法 |
EP2604055B1 (en) | 2010-08-13 | 2018-07-25 | Telefonaktiebolaget LM Ericsson (publ) | Automatic guard period adjustment in time division duplexed wireless communication |
CN102202352A (zh) * | 2011-03-31 | 2011-09-28 | 上海华为技术有限公司 | 数据传输方法和设备 |
CN103249149B (zh) * | 2012-02-03 | 2016-08-24 | 华为技术有限公司 | 分组数据业务下行数据块的发送、接收方法及装置 |
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 |
CN105744635B (zh) * | 2014-12-12 | 2019-01-18 | 北京永安信通科技股份有限公司 | 基于后向阀门的数据包传输调度方法和装置 |
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- 2003-04-15 CN CNB031097561A patent/CN100486144C/zh not_active Expired - Fee Related
-
2004
- 2004-04-15 EP EP04727497.2A patent/EP1619814B1/en not_active Expired - Lifetime
- 2004-04-15 WO PCT/CN2004/000359 patent/WO2004093361A1/zh active Application Filing
-
2005
- 2005-10-17 US US11/252,047 patent/US7586883B2/en active Active
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Title |
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See also references of EP1619814A4 |
Also Published As
Publication number | Publication date |
---|---|
US7586883B2 (en) | 2009-09-08 |
CN1538652A (zh) | 2004-10-20 |
EP1619814A1 (en) | 2006-01-25 |
EP1619814B1 (en) | 2014-08-27 |
CN100486144C (zh) | 2009-05-06 |
EP1619814A4 (en) | 2011-10-26 |
US20060087997A1 (en) | 2006-04-27 |
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