WO2000060889A1 - Dispositif de station amcr de base et procede de communication associe - Google Patents
Dispositif de station amcr de base et procede de communication associe Download PDFInfo
- Publication number
- WO2000060889A1 WO2000060889A1 PCT/JP2000/001909 JP0001909W WO0060889A1 WO 2000060889 A1 WO2000060889 A1 WO 2000060889A1 JP 0001909 W JP0001909 W JP 0001909W WO 0060889 A1 WO0060889 A1 WO 0060889A1
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- WO
- WIPO (PCT)
- Prior art keywords
- downlink signal
- base station
- spreading
- spreading factor
- path strength
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims description 92
- 238000000034 method Methods 0.000 title claims description 14
- 239000000284 extract Substances 0.000 claims abstract description 15
- 108010003272 Hyaluronate lyase Proteins 0.000 claims description 59
- 238000012937 correction Methods 0.000 claims description 23
- 238000005259 measurement Methods 0.000 claims description 15
- 238000007689 inspection Methods 0.000 claims description 9
- 125000004122 cyclic group Chemical group 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 15
- 238000000605 extraction Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7113—Determination of path profile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
-
- 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]
-
- 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
-
- 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
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
-
- 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
- H04B2201/70705—Rate detection
Definitions
- the present invention relates to a CDMA base station apparatus and a CDMA communication method in a communication system using a CDMA system.
- CDMA Code Division Multiple Access
- PN pseudo-noise
- a land mobile communication system using the CDMA system is disclosed in, for example, US Pat. No. 4,901,307.
- One of the CDMA systems is a direct spreading system in which a transmission signal is multiplied by a code such as a pseudo-noise sequence (hereinafter referred to as a “spreading code”).
- base station apparatus a conventional CDMA base station apparatus (hereinafter, simply referred to as “base station apparatus”) to a communication terminal apparatus.
- FIG. 1 is a block diagram showing a configuration of a conventional base station device and a communication terminal device. First, the flow of a downlink signal in a conventional CDMA communication device will be described with reference to FIG.
- the downstream signal transmitted from a certain base station device 1 to the communication terminal device 2 is spread by the spreading unit 11. Multiplied by a unique spreading code.
- the downlink signal transmitted from base station apparatus 1 to communication terminal apparatus 3 is multiplied by spreading section 12 by a unique spreading code.
- the respective downstream signals subjected to the spread processing are combined in the combining unit 13 and transmitted wirelessly from the transmitting antenna 14.
- the combined signal received by the receiving antenna 21 of the communication terminal device 2 is multiplied by a despreading unit 22 by the same spreading code as that multiplied by the spreading unit 11 to obtain a downlink signal to the communication terminal device 2. Is extracted.
- the combined signal received by the receiving antenna 31 of the communication terminal 3 is multiplied by the same spreading code as that multiplied by the spreading unit 12 by the despreading unit 32 and the communication terminal
- the downlink signal for 3 is extracted.
- the uplink signal from communication terminal device 2 is multiplied by a unique spreading code in spreading section 23, and is wirelessly transmitted from transmitting antenna 24.
- an uplink signal from communication terminal apparatus 3 is multiplied by a unique spreading code in spreading section 33, and wirelessly transmitted from transmitting antenna 34.
- the signal received by the receiving antenna 41 of the base station apparatus 1 is multiplied by the same spreading code as that multiplied by the spreading section 23 in the despreading section 42, and the uplink signal in the communication terminal apparatus 2 is converted.
- the extracted signal is multiplied by a despreading unit 43 by the same spreading code as that multiplied by the spreading unit 33, and an uplink signal in the communication terminal device 3 is extracted.
- FIG. 1 shows a case where the base station apparatus 1 performs radio communication simultaneously with the two communication terminal apparatuses 2 and 3, the base station apparatus generally performs radio communication at the same time according to the system capacity.
- a spreading unit and a despreading unit are prepared by the number of communication terminal devices capable of performing communication.
- the spreading factor is fixedly set so that sufficient reception quality can be obtained even when the propagation environment is poor and the reception path strength is weak. Then, as shown in FIG. 2, one of the prepared spreading codes is assigned to each user, such as spreading code I for user 1 and spreading code J for user 2. .
- the spreading factor is fixedly set in advance, one spreading code is independently assigned to a user having a good propagation environment. Therefore, when the number of users simultaneously communicating increases, the number of spreading codes to be used increases in proportion to this, and there is a problem that interference between users increases and reception quality deteriorates. Disclosure of the invention
- An object of the present invention is to provide a CDMA base station apparatus and a CDMA communication method that can increase channel capacity while suppressing interference between users and maintaining sufficient reception quality.
- This object is achieved by variably controlling the spreading factor and the time slot of the spreading code by which the downlink transmission signal is multiplied, based on the downlink reception path strength and the like.
- FIG. 1 is a block diagram showing the configuration of a conventional base station apparatus and communication terminal apparatus
- FIG. 2 is a diagram showing a conventional spreading code assignment method
- FIG. 3 is a block diagram showing configurations of a base station apparatus and a communication terminal apparatus according to Embodiment 1 of the present invention.
- FIG. 4 is a diagram showing a spreading code allocating method according to Embodiment 1 of the present invention.
- FIG. 5 is a diagram showing a configuration of a base station apparatus and a communication terminal apparatus according to Embodiment 2 of the present invention. Block diagram,
- FIG. 6 is a block diagram showing configurations of a base station apparatus and a communication terminal apparatus according to Embodiment 3 of the present invention.
- FIG. 7 is a block diagram showing a configuration of a base station apparatus and a communication terminal apparatus according to Embodiment 4 of the present invention.
- the communication terminal apparatus measures the reception path strength and reports it to the base station apparatus, and the base station apparatus determines the spreading factor and the like of the downlink signal based on the reported reception path strength It is a form.
- FIG. 3 is a block diagram showing a configuration of a base station apparatus and a communication terminal apparatus according to Embodiment 1.
- base station apparatus 101, communication terminal apparatus 201, and communication terminal apparatus 202 are assumed, and base station apparatus 101 performs communication.
- a case where wireless communication is performed simultaneously with the terminal device 201 and the communication terminal device 202 will be described.
- spreading section 111 multiplies a signal transmitted to communication terminal apparatus 201 (hereinafter, referred to as “downlink signal A”) by a unique spreading code A.
- Spreading section 112 multiplies a transmission signal to communication terminal apparatus 202 (hereinafter, referred to as “down signal B”) by a unique spreading code B.
- spreading codes A and B may have the same spreading code if the time slots to be multiplied are different from each other.
- the combining section 121 combines the signals output from the spreading section 111, the spreading section 112, the spreading code determining section 191 and the slot determining section 181, and transmits the signals from the transmitting antenna 131. Transmit wirelessly.
- the despreading unit 151 multiplies the signal received by the receiving antenna 141 by the spreading code C, and converts the signal transmitted from the communication terminal device 201 (hereinafter referred to as “uplink signal C”). Take out.
- the despreading section 152 multiplies the signal received by the reception antenna 141 by the spreading code D, and extracts the signal transmitted from the communication terminal apparatus 202 (hereinafter, referred to as “up signal D”). .
- the path strength extractor 161 extracts the path strength information included in the uplink signal C output from the despreading section 151.
- the path strength extractor 162 extracts the path strength information included in the uplink signal D output from the despreader 152.
- the spreading factor determining unit 17 1 determines the spreading factor of the spreading code to be multiplied with the downlink signal A based on the path strength information output from the path strength extracting unit 161, and outputs from the path strength extracting unit 16 2
- the spreading factor of the spreading code to be multiplied with the downlink signal B is determined based on the obtained path strength information.
- the slot determining unit 18 1 determines the time slots of the downlink signal A and the downlink signal B based on the spreading factor information output from the spreading factor determining unit 171, and the spreading unit 11 1 and the spreading unit, respectively. Output to 1 1 2 and synthesis section 1 2 1.
- the spreading code determining section 1991 generates the spreading code A and the spreading code B based on the spreading factor information output from the spreading factor determining section 171 and the time slot information output from the slot determining section 181. It is determined and output to spreading section 111, spreading section 112 and combining section 121 respectively.
- despreading section 2 12 extracts downlink signal A by multiplying the signal received by receiving antenna 2 1 1 by spreading code A.
- the path strength measuring section 2 13 measures the path strength of the downlink signal A output from the despreading section 2 12.
- the multiplexing section 2 14 multiplexes the uplink signal C with the path strength information output from the path strength measuring section 2 13.
- Spreading means 2 15 multiplies the output signal of multiplexing section 2 14 by spreading code C, and wirelessly transmits from transmitting antenna 2 16.
- despreading section 222 extracts the downlink signal B by multiplying the signal received by receiving antenna 222 by the spreading code B.
- the path strength measurement unit 2.23 measures the path strength of the downlink signal B output from the despreading unit 222.
- the multiplexing unit 224 multiplexes the uplink signal D with the path strength information output from the path strength measuring unit 223.
- Spreading means 225 multiplies the output signal of multiplexing section 224 by spreading code D, and transmits the radio signal from transmitting antenna 226.
- the downlink signal A to the communication terminal device 201 is multiplied by the spreading code A output from the spreading code determining unit 191 by the spreading unit 111 in the time slot determined by the slot determining unit 181. Is done.
- downlink signal B to communication terminal apparatus 202 spreads spreading code B output from spreading code determining section 191 in the time slot determined by slot determining section 181. Multiplied in sections 1 1 and 2.
- Spreading downlink signal A and downlink signal B are combined in combining section 121 together with the signals output from spreading code determination section 1911 and slot determination section 181, and transmission antenna 13 Transmitted wirelessly from 1.
- the combined signal received by the receiving antenna 211 of the communication terminal apparatus 201 is multiplied by the spreading code A in the despreading section 212 to extract the downlink signal A. Also, the reception path strength of the extracted downlink signal A is measured by the path strength measuring means 2 13. Similarly, the combined signal received by the receiving antenna 2 21 of the communication terminal apparatus 202 is multiplied by the spreading code B in the despreading section 222 to extract the downlink signal B. Further, the reception path strength of the downlink signal B is measured by the path strength measuring means 222.
- an uplink signal flow in the CDMA communication apparatus according to Embodiment 1 will be described with reference to FIG.
- the uplink signal C from the communication terminal device 201 is multiplexed with path strength information in the multiplexing unit 214, multiplied by the spreading code C in the spreading unit 215, and wirelessly transmitted from the transmitting antenna 216. Is done.
- uplink signal D from communication terminal apparatus 202 is multiplexed with path strength information in multiplexing section 224, multiplied by spreading code D in spreading section 225, and transmitted antenna 224. Transmitted wirelessly from 6.
- the signal received by the receiving antenna 14 1 of the base station apparatus 101 is multiplied by the spreading code C in the despreading section 15 1, and the uplink signal C including the path strength information in the communication terminal apparatus 201 is multiplied.
- path strength information in communication terminal apparatus 201 is separated from uplink signal C in path strength extraction section 161
- communication terminal apparatus 20 is separated from uplink signal D in path strength extraction section 162.
- the path strength information in 2 is separated.
- Each of the separated path strength information is input to the spreading factor determining unit 171, and the spreading factor determining unit 171 determines the spreading factor of each downlink signal.
- information on the spreading factor of each downlink signal is input to slot determining section 181, and time slot of each downlink signal is determined by slot determining section 181. Also, the information of the spreading factor of each downlink signal and the time slot information are input to the spreading code determining unit 191, and the spreading code determining unit 1991 determines the spreading code of each downlink signal.
- FIG. 3 shows a case where the base station apparatus 101 performs wireless communication with two communication terminal apparatuses 201 and 202 simultaneously, in the present invention, wireless communication is performed simultaneously with the base station apparatus. It is not limited to the number of communication terminal devices to perform.
- the base station 101 has a spreading unit, a despreading unit, and a path strength extracting unit for the number of communication terminals capable of simultaneously performing wireless communication according to the system capacity. Is done.
- a method of determining the spreading factor and time slot of the downlink signal in the CDMA communication apparatus according to Embodiment 1 will be described with reference to the diagram showing the spreading code allocation method in FIG. And will be described in detail.
- the spreading factor determination unit of the base station apparatus determining based on the path strength extracted by the path strength extraction unit, the reception path strength for user 1 is weak, and in order to obtain sufficient reception quality, It is necessary to spread at spreading factor N, and the reception path strength for user 2 and user 3 is strong. Even if spreading at spreading factor NZ2, sufficient reception quality can be obtained.
- the downlink signal of user 1 is transmitted in all time slots of spreading code I, and the downlink signal of user 2 is transmitted in time slot 1 in the first half of spreading code J.
- the downlink signal of user 3 is transmitted in time slot 2 in the latter half of spreading code J.
- the spreading factor is made small enough to obtain sufficient reception quality, and the spreading code and time slot are determined.
- the spreading code and time slot are determined.
- a communication terminal apparatus measures reception quality from a bit error rate and a result of a CRC (Cyclic Redundancy Check) and reports to a base station apparatus, and the base station apparatus reports the reception quality.
- CRC Cyclic Redundancy Check
- FIG. 5 is a block diagram showing a configuration of a base station apparatus and a communication terminal apparatus according to Embodiment 2.
- the base station shown in FIG. 5 is different from the base station shown in FIG.
- the path strength extraction units 16 1 and 16 2 are deleted, and reception quality extraction units 3 1 1 and 3 1 2 are added instead.
- the communication terminal device shown in FIG. 5 is different from the communication terminal device of FIG. 3 in that the path strength measurement units 2 13 and 2 23 are deleted, and instead, the error correction units 4 1 1 and 4 2 1
- CRC inspection sections 4 12 and 4 2 2 and reception quality measurement sections 4 13 and 4 2 3 are added.
- despreading section 15 1 multiplies the signal received by receiving antenna 14 4 by spreading code C to extract uplink signal C, and outputs the signal to reception quality extracting section 3 1 1 .
- the despreading unit 152 extracts the uplink signal D by multiplying the signal received by the receiving antenna 141 by the spreading code D, and outputs the uplink signal D to the reception quality extracting unit 3122.
- Reception quality extraction section 311 extracts reception quality information carried on uplink signal C output from despreading section 151.
- Reception quality extraction section 312 extracts reception quality information carried on uplink signal D output from despreading section 152.
- the spreading factor determining unit 17 1 determines the spreading factor of the spreading code to be multiplied with the downlink signal A based on the receiving quality information output from the receiving quality extracting unit 3 11, and outputs the spreading code from the receiving quality extracting unit 3 1 2
- the spreading factor of the spreading code to be multiplied by the downlink signal B is determined based on the received reception quality information.
- despreading section 2 12 takes out downlink signal A by multiplying signal received by receiving antenna 2 1 1 by spreading code A, and outputs it to error correction section 4 1 1 .
- the error correction section 4 11 1 corrects the error of the downlink signal A output from the despreading section 2 12.
- Inspection unit 4 12 performs CRC on downlink signal A after error correction.
- Reception quality measurement unit 4 13 measures the reception quality from the error correction result and CRC result.
- Unit 214 multiplexes the reception quality information output from reception quality measurement unit 413 with uplink signal C.
- despreading section 222 receives reception antenna 222.
- the received signal is multiplied by the spreading code B to extract the downstream signal B, and output to the error correction unit 421.
- the error correction section 4 2 1 corrects the error of the downlink signal A output from the despreading section 2 2.
- Length (inspection unit 4 22 performs CRC on downlink signal B after error correction.
- Reception quality measurement unit 4 2 3 measures reception quality from error correction result and CRC result.
- Multiplexing unit 2 14 multiplexes the reception quality information output from the reception quality measurement section 4 23 with the uplink signal C.
- the spreading factor is made small enough to obtain sufficient reception quality, and the spreading code and time slot are determined. Thus, it is possible to increase the system capacity while maintaining sufficient reception quality.
- Embodiment 3 focuses on the fact that the delay profile in the communication terminal apparatus and the delay profile in the base station apparatus are substantially the same, and measures the reception path strength of the uplink signal in the base station apparatus and measures the measured reception path strength. In this mode, the spreading factor and the like of the downlink signal are determined based on the path strength.
- FIG. 6 is a block diagram showing a configuration of a base station apparatus and a communication terminal apparatus according to Embodiment 3.
- the same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.
- the path strength extraction units 16 1 and 16 2 are deleted from the base station apparatus shown in FIG. 3, and path strength measurement units 5 1 1 and 5 1 2 are added instead. Is done.
- the path strength measuring units 2 13 and 2 23 are deleted from the communication terminal device of FIG.
- despreading section 15 1 multiplies the signal received by receiving antenna 14 4 by spreading code C, extracts uplink signal C, and outputs the signal to path strength measuring section 5 1 1 .
- the despreading unit 152 extracts the uplink signal D by multiplying the signal received by the receiving antenna 14 4 by the spreading code D, and outputs the path strength measurement unit 5 12 I do.
- Path strength measurement section 511 measures the reception path strength of uplink signal C output from despreading section 151.
- the path strength measuring section 512 measures the reception path strength of the uplink signal D output from the despreading section 152.
- the spreading factor determining unit 17 1 determines the spreading factor of the spreading code by which the downlink signal A is multiplied based on the received path strength information output from the path strength measuring unit 5 1
- the spreading factor of the spreading code to be multiplied with the downlink signal B is determined based on the reception path strength information output from 2.
- the scale of the hardware or software of the communication terminal apparatus can be reduced, The size of the device can be reduced and the power consumption can be reduced.
- Embodiment 4 focuses on the fact that the delay profile in the communication terminal device and the delay profile in the base station device are almost the same, and the base station device determines the reception quality from the bit error rate of the uplink signal and the CRC result. This is a mode in which measurements are made and the spreading factor of the downlink signal is determined based on the measured reception quality.
- FIG. 7 is a block diagram showing a configuration of a base station apparatus and a communication terminal apparatus according to Embodiment 4.
- the base station apparatus shown in FIG. 7 is different from the base station apparatus in FIG. 6 in that the path strength measurement units 5 1 1 and 5 1 2 are deleted, and instead, the error correction units 6 1 1 and 6 1 2 (: Inspection units 6 2 1 and 6 2 2 and reception quality measurement units 6 3 1 and 6 3 2 are added.
- the communication terminal device shown in FIG. 7 is the same as the communication terminal device of FIG. is there.
- despreading section 15 1 multiplies the signal received by receiving antenna 14 1 by spreading code C to extract uplink signal C, and performs error correction section 6 1 Output to 1.
- the despreading unit 152 extracts the uplink signal D by multiplying the signal received by the receiving antenna 141 by the spreading code D, and outputs the uplink signal D to the error correction unit 612.
- the error correction section 6 11 1 corrects the error of the uplink signal C output from the despreading section 15 1.
- the error correction section 6 12 corrects the error of the uplink signal D output from the despreading section 152.
- the length inspection unit 62 1 performs CRC on the uplink signal C after error correction.
- the CRC inspection unit 622 performs CRC on the uplink signal D after error correction.
- the reception quality measuring section 631 measures the reception quality of the uplink signal C from the error correction result and the CRC result.
- the reception quality measuring section 6332 measures the reception quality of the uplink signal D from the error correction result and the CRC result.
- the spreading factor determining section 17 1 determines the spreading factor of the spreading code by which the downlink signal A is multiplied based on the receiving quality information output from the receiving quality measuring section 631, and the receiving quality measuring section 63 2 The spreading factor of the spreading code to be multiplied with the downlink signal B is determined based on the reception quality information output from.
- the scale of the hardware or software of the communication terminal apparatus can be reduced, and the size of the communication terminal apparatus can be reduced. And power consumption can be reduced.
- the spreading factor and the time slot of the spreading code by which the downlink transmission signal is multiplied are variable based on the downlink reception path strength and the like.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mobile Radio Communication Systems (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020007013510A KR20010043940A (ko) | 1999-04-01 | 2000-03-28 | Cdma 기지국 장치 및 cdma 통신 방법 |
EP20000911422 EP1087629A1 (en) | 1999-04-01 | 2000-03-28 | Cdma base station device and cdma communication method |
AU33302/00A AU3330200A (en) | 1999-04-01 | 2000-03-28 | Cdma base station device and cdma communication method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/95029 | 1999-04-01 | ||
JP9502999A JP2000295198A (ja) | 1999-04-01 | 1999-04-01 | Cdma基地局装置及びcdma通信方法 |
Publications (1)
Publication Number | Publication Date |
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WO2000060889A1 true WO2000060889A1 (fr) | 2000-10-12 |
Family
ID=14126678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/001909 WO2000060889A1 (fr) | 1999-04-01 | 2000-03-28 | Dispositif de station amcr de base et procede de communication associe |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1087629A1 (ja) |
JP (1) | JP2000295198A (ja) |
KR (1) | KR20010043940A (ja) |
CN (1) | CN1297660A (ja) |
AU (1) | AU3330200A (ja) |
WO (1) | WO2000060889A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101729232B (zh) * | 2001-08-30 | 2013-07-03 | 株式会社Ntt都科摩 | 无线传送系统和无线传送方法 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6567393B2 (en) * | 2001-02-27 | 2003-05-20 | Nokia Networks Oy | Dynamic reselection of CDMA spreading codes |
US7301984B2 (en) | 2001-05-08 | 2007-11-27 | Sony Corporation | Wireless communication system using an impulse signal train, a wireless transmission apparatus, a wireless reception apparatus, a wireless transmission method, and a wireless reception method |
US6778812B1 (en) | 2002-05-24 | 2004-08-17 | Interdigital Technology Communication | System and method for call admission control |
US7457230B2 (en) | 2003-01-31 | 2008-11-25 | Ntt Docomo, Inc. | Sending radio station, receiving radio station, radio communication system, and radio communication method |
US7397839B2 (en) | 2004-01-27 | 2008-07-08 | Ntt Docomo, Inc. | OFDM communication system and method |
JP4086833B2 (ja) * | 2004-10-27 | 2008-05-14 | 日本電波工業株式会社 | 高周波無線機の制御方法及び高周波無線機システム |
JP4588547B2 (ja) * | 2005-06-14 | 2010-12-01 | 日本電信電話株式会社 | 多重通信システム及び多重通信方法 |
JP5068691B2 (ja) * | 2008-04-28 | 2012-11-07 | 株式会社エヌ・ティ・ティ・ドコモ | 基地局、移動局及び共通情報通信方法 |
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JPH06276176A (ja) * | 1993-03-18 | 1994-09-30 | Fujitsu Ltd | Cdma通信方式 |
JPH09312881A (ja) * | 1996-05-22 | 1997-12-02 | N T T Ido Tsushinmo Kk | Cdma移動通信システムにおける無線回線の構成方法 |
EP0876008A1 (en) * | 1997-05-02 | 1998-11-04 | Siemens Aktiengesellschaft | Adaptive data rate TDMA/CDMA communications system |
JPH11234242A (ja) * | 1998-02-10 | 1999-08-27 | Matsushita Electric Ind Co Ltd | 時分割複信cdma移動体通信システム及び方法 |
-
1999
- 1999-04-01 JP JP9502999A patent/JP2000295198A/ja active Pending
-
2000
- 2000-03-28 CN CN00800389A patent/CN1297660A/zh active Pending
- 2000-03-28 EP EP20000911422 patent/EP1087629A1/en not_active Withdrawn
- 2000-03-28 AU AU33302/00A patent/AU3330200A/en not_active Abandoned
- 2000-03-28 KR KR1020007013510A patent/KR20010043940A/ko not_active Application Discontinuation
- 2000-03-28 WO PCT/JP2000/001909 patent/WO2000060889A1/ja not_active Application Discontinuation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH06276176A (ja) * | 1993-03-18 | 1994-09-30 | Fujitsu Ltd | Cdma通信方式 |
JPH09312881A (ja) * | 1996-05-22 | 1997-12-02 | N T T Ido Tsushinmo Kk | Cdma移動通信システムにおける無線回線の構成方法 |
EP0876008A1 (en) * | 1997-05-02 | 1998-11-04 | Siemens Aktiengesellschaft | Adaptive data rate TDMA/CDMA communications system |
JPH11234242A (ja) * | 1998-02-10 | 1999-08-27 | Matsushita Electric Ind Co Ltd | 時分割複信cdma移動体通信システム及び方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101729232B (zh) * | 2001-08-30 | 2013-07-03 | 株式会社Ntt都科摩 | 无线传送系统和无线传送方法 |
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Publication number | Publication date |
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EP1087629A1 (en) | 2001-03-28 |
CN1297660A (zh) | 2001-05-30 |
KR20010043940A (ko) | 2001-05-25 |
JP2000295198A (ja) | 2000-10-20 |
AU3330200A (en) | 2000-10-23 |
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