WO2004098086A1 - 同期処理装置及び同期処理方法 - Google Patents
同期処理装置及び同期処理方法 Download PDFInfo
- Publication number
- WO2004098086A1 WO2004098086A1 PCT/JP2004/005792 JP2004005792W WO2004098086A1 WO 2004098086 A1 WO2004098086 A1 WO 2004098086A1 JP 2004005792 W JP2004005792 W JP 2004005792W WO 2004098086 A1 WO2004098086 A1 WO 2004098086A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- delay profile
- period
- communication
- timing
- communication partner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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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
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
-
- 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
- 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
- H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
- H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
Definitions
- the present invention relates to a synchronization processing device and a synchronization processing method, and more particularly to a synchronization processing device and a synchronization processing method for creating a delay profile and detecting a reception timing.
- a delay profile is created from correlation values of scattered codes, and the timing of the reception path is specified by detecting the peak of the created delay profile.
- simultaneous reception of multiple channels is essential for the base station apparatus.
- An inter-sector H O (handover) is performed between adjacent sectors in the same base station apparatus.
- HO between cells is performed between adjacent base station apparatuses.
- the mobile station communicates with the base station apparatus by switching between the normal mode and the compressed mode according to an instruction from the higher station apparatus as needed.
- this compressed mode by temporarily lowering the spreading rate of information data to the frame, the frame is transmitted with a certain transmission off period within the frame, and the mobile station uses this vacant time to transmit the frame. And receives signals of other frequencies from the base station equipment of the cell to which the own station belongs and the adjacent cell. Therefore, if the mobile station enters the compressed mode while communicating with a certain base station apparatus in the normal mode, the base station apparatus which has been communicating until now will be transmitted from the mobile station which has entered the compressed mode. Received signal can be received for a predetermined period by the compressed mode parameter. There is no status (mobile device transmission is off).
- the delay profile generation timing for each channel in other words, the reception baseband signal to be processed for each channel has a fixed timing with respect to the base station apparatus reference frame or reference slot.
- FIG. 1 is a diagram showing a conventional delay profile generation timing of each channel at a fixed timing.
- the base station reference frame in FIG. 1 shows a reference frame of the base station apparatus, and one frame is 1 Oms.
- the delay profile generation timing in Fig. 1 indicates the delay profile generation timing.
- the CM pattern of ch # 0 in Fig. 1 indicates the timing at which the mobile station communicating on channel # 0 turns off the transmission by the compressed mode. “0” is the transmission ON state. In FIG. 1, it is assumed that the vehicle moves rightward over time.
- Delay profiles are created for all channels in order from channel # 0 for each frame.
- the transmission off timing is obtained by a calculation using a compressed mode parameter, and occurs at a predetermined cycle.
- the timing of creating a delay profile in channel # 0 is determined by the mobile station performing communication using channel # 0.
- the transmission timing may overlap with the transmission off timing.
- a delay profile of the mobile station having the overlapped timing cannot be generated, so that there is a problem that the reception timing cannot be detected. Disclosure of the invention
- An object of the present invention is to reliably detect the reception timing of each communication partner by preventing a state where a delay profile of a specific communication partner cannot be created. And a synchronous processing method and a synchronous processing method.
- the purpose of this is to calculate the transmission off period from the compressed mode parameter to make the mobile device set the transmission off period in the compressed mode, and the period for creating the delay profile for each mobile device and the transmission off period do not overlap As described above, this can be achieved by setting a timing for creating a delay profile for each mobile terminal.
- Figure 1 shows the timing of creating the transmission off-period timing and delay profile.
- FIG. 2 is a block diagram showing the configuration of the receiving apparatus according to Embodiment 1 of the present invention.
- FIG. 3 is a flowchart showing the operation of the receiving apparatus according to Embodiment 1 of the present invention. Diagram showing the timing of creating the timing and delay profiles for
- Figure 5 shows the timing for creating the transmission off-period timing and delay profile.
- FIG. 6 is a block diagram illustrating a configuration of a receiving apparatus according to Embodiment 2 of the present invention.
- FIG. 7 is a block diagram illustrating a configuration of a receiving baseband signal switching unit according to Embodiment 2 of the present invention.
- FIG. 8 is a schematic diagram showing a mobile station communicating with the base station device in the sector S1
- FIG. 9 is a diagram showing the timing of the transmission off period and the timing for creating a delay profile
- FIG. 10 is a diagram showing channel assignment in each sector of one frame.
- FIG. 11 is a diagram illustrating the timing of the transmission off period and the timing for creating the delay profile.
- FIG. 2 is a diagram illustrating a configuration of the receiving apparatus 100 including the synchronization processing apparatus 110 according to the first embodiment.
- the synchronization processing device 110 includes a transmission off period detection unit 103, a delay profile generation control unit 104, a delay profile generation unit 105, and a path search unit 106.
- Radio section 102 as receiving means performs processing such as down-conversion of the reception signal received by antenna 101 from a radio frequency to a baseband frequency, and outputs the result to delay port file generation section 105. .
- the transmission off period detecting unit 103 which is a communication suspension period detecting means, obtains the transmission off period from the compressed mode parameter input from the base band control unit (not shown) and outputs the transmission off period to the delay profile generation control unit 104.
- the compressed mode is a mode in which the mobile station stops communication at the timing specified by the compressed mode parameter from the host station apparatus.
- the compressed mode parameter is a transmission period during which this communication is stopped. It determines the length of the off period, the interval of the transmission off period, and the like.
- the delay profile generation control unit 104 which is a timing control unit, creates a delay profile from the channel use state information input from the baseband control unit and the transmission off period information input from the transmission off period detection unit 103. It is determined for each channel whether or not the period overlaps the transmission off period in the compressed mode. Then, when the delay profile generation control unit 104 determines that the period during which the delay port file is created overlaps with the transmission off period in the compressed mode, the delay profile generation controller and the compressed profile The delay profile generation unit 105 is instructed to change the order of the channels for generating the delay profile so that the transmission off period in the mode does not overlap.
- the channel use state information is information on each channel as to whether or not it is currently being used.
- the mobile station communicates with a base station apparatus such as an adjacent cell in order to search for a base station apparatus of a handover destination.
- the communication with the base station device is temporarily stopped.
- the delay profile generation unit 105 creates a delay profile for each channel in the order of the channels specified by the delay profile generation control unit 104. Then, the delay profile generation unit 105 outputs information of the created delay profile to the path search unit 106.
- the path search unit 106 detects, as reception path timing, a time at which the power value reaches a peak from the delay profile information input from the delay profile generation unit 105, and detects the reception path timing for each detected channel.
- the information is output to a demodulation unit (not shown), and the demodulation unit demodulates the received signal based on the reception path timing.
- the transmission off period detecting section 103 detects the transmission off period in the compressed mode from the compressed mode parameter (step ST201).
- the delay profile generation control unit 104 determines whether or not each channel is in use from the channel use state information (step ST202).
- the delay profile generation control unit 104 determines whether or not the transmission off period and the period for creating the delay profile for the channel being used overlap (step ST203).
- the delay profile generation unit 105 sends the channel for which the delay profile is created according to the instruction of the delay profile generation control unit 104.
- the transmission off period and the period for creating the delay profile are not overlapped by changing the order of the channels on a channel basis (step ST204).
- step ST203 if the transmission off period and the period for creating the delay profile do not overlap in all channels, the rearrangement is performed. Absent.
- FIGS. 4 and 5 illustrate a case where receiving apparatus 100 is applied to a base station apparatus.
- the base station reference frame in FIG. 4 indicates a reference frame of the base station apparatus, and the delay profile generation timing in FIG. 4 indicates that the delay profile of each channel is created in a time-division manner.
- the CM pattern of ch # 0 in FIG. 4 indicates that a transmission off period occurs at the beginning of each frame for channel # 0. In FIG. 4, it is assumed that the vehicle moves to the right as time passes.
- a mobile station as a communication partner is communicating with the base station apparatus on channel # 0.
- the delay profile generation control unit 104 sets the channel # 1, the channel # 2, the channel # 0, and the channel # 4 so that the delay profile creation period of the channel # 0 does not overlap the transmission off period of the channel # 0.
- the delay profile generation unit 105 is controlled so that delay profiles are created in the order of # 3, channel # 4, channel # 5, channel # 6, and channel # 7. As a result, as shown in FIG. 4, the delay profile creation period of channel # 0 and the transmission off period of channel # 0 do not overlap.
- the transmission off period of channel # 0 repeatedly occurs once every frame (10 ms) at a constant cycle.
- a mobile station that performs communication using channel # 0 can have the transmission off period and the delay profile creation period overlap in each frame. There is no.
- the timing of the transmission off period differs for each channel, but by changing the order of the channels for which the delay profile is created so that the transmission off period and the delay profile creation period do not overlap for each channel, it is ensured for each channel.
- a delay profile can be created.
- the base station reference frame in FIG. 5 indicates a reference frame of the base station apparatus, and the delay profile generation timing in FIG. 5 indicates that the delay profile of each channel is created in a time-division manner.
- the CM pattern of ch # 0 in FIG. 5 indicates that the transmission off period of channel # 0 occurs at the beginning of each frame for each frame. In FIG. 5, the vehicle moves to the right as time passes.
- FIG. 5 shows a case in which the order of channels for creating a delay profile is different for each frame.
- the delay profile generation control unit 104 sets the channel # 0, channel # 1, channel # 2, channel # 3, channel # 4, channel # 5, channel # 6, and channel # 7 in this order. Create a delay profile and create a delay profile in the following frame in the order of channel # 6, channel # 7, channel # 0, channel # 1, channel # 2, channel # 3, channel # 4, channel # 5. Then, in the next frame, a delay profile is created in the order of channel # 4, channel # 5, channel # 6, channel # 7, channel # 0, channel # 1, channel # 2, channel # 3.
- the transmission off period and the delay profile creation period for a specific channel overlap even if there is a frame in which the transmission off period and the delay profile creation period for a specific channel overlap, the transmission off period and the delay profile creation period for other frames Is heavy Therefore, for example, if a delay profile is created by averaging a plurality of frames for a specific channel, a delay profile can be created reliably for each channel.
- delay profile generation control section 104 controls the channel for which the delay profile is to be created so that the transmission-off period in the compressed mode does not overlap with the period in which the delay profile is created. Since the order is changed, it is possible to prevent a situation in which it is not possible to create a delay profile for a specific mobile device, and it is possible to reliably detect the reception timing of all mobile devices.
- FIG. 6 is a diagram illustrating a configuration of a receiving device 500 including the synchronization processing device 510 according to the second embodiment.
- the receiving apparatus 500 is different from the receiving apparatus 100 according to Embodiment 1 of the present invention shown in FIG. 2 in that a receiving baseband signal switching unit 504 is added and antennas 501-l to 501_n are provided instead of the antenna 101.
- it has wireless units 502-1 to 502-n instead of the wireless unit 102.
- the same components as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted.
- the synchronization processing device 510 includes a reception baseband signal switching unit 504, a transmission off period detection unit 103, a delay profile generation control unit 104, a delay profile generation unit 105, and a path search unit 106.
- Radio sections 502-1 to 502-n perform processing such as down-comparison of the received signals received by antennas 501-l to 501_n from the radio frequency to the baseband frequency, and to reception baseband signal switching section 504. Output.
- the reception baseband signal switching unit 504 switches the reception baseband signals of all the sectors input from the radio units 502-1 to 502-11 by switching, so that the delay profile generation control unit 104 performs processing per sector. Then, it controls which sector of the received baseband signal is output to delay profile generating section 105. The details of the reception baseband signal switching unit 504 will be described later.
- the delay profile generation control unit 104 uses the channel use state information input from the baseband control unit and the transmission off period information input from the transmission off period detection unit 103 to determine the delay profile creation period and compressed period. It is determined for each sector whether or not the transmission off period in the mode overlaps.
- the delay profile creation control unit 104 determines that the delay profile creation period is The delay profile generation unit 105 is instructed to change the order of the sectors in which the delay profile is created so that the transmission off period in the mode does not overlap.
- FIG. 7 is a diagram showing a configuration of the reception baseband signal switching unit 504.
- the reception baseband signal switching section 504 has the same number of switches 6101-: !! as the radio sections 502-l to 502-n. 6 6 1 1-n, and any one of the switches 6 0 1-1 to 6 0 1-n is selected and turned on by the instruction of the delay profile generation control unit 104, and the remaining switches are turned on. 6 0 1—1 to 6 0 l—n are turned off.
- the reception baseband signal switching section 504 is configured to switch the radio section 502— ! every time any one of the switches 601-1-1 to 611-1 is turned on. It outputs the received signal input from ⁇ 502_n to the delay profile generator 105.
- the reception baseband signal switching unit 504 performs such processing for all the switches 61-1-1-1 to 61-1-n.
- FIGS. 8 to 11 show a case where receiving apparatus 500 is applied to a base station apparatus.
- FIG. 8 shows a state in which cell # 702 of base station apparatus 701 is divided into six sectors S1 to S6.
- the mobile station 703 communicates with the base station apparatus 701 in the area of the sector S1, but the base station apparatus 701 is connected to the mobile station 703 for all sectors S1 to S6.
- a plurality of mobile stations communicate with the base station apparatus 701 in the sector S1, but for convenience of description, descriptions of mobile stations other than the mobile station 703 are omitted.
- the base station reference frame in FIG. 9 indicates the reference frame of the base station apparatus, and the delay profile generation timing in FIG. 9 indicates that the delay profile of each sector is created by time division.
- the CM pattern of ch # 0 in FIG. 9 indicates that the transmission off period of channel # 0 used by mobile station 703 occurs at the beginning of each frame for each frame. In FIG. 9, it is assumed that the vehicle moves rightward over time.
- FIG. 10 shows one frame in FIG. 9 in detail, and it is assumed that the vehicle moves to the right as time passes.
- channels # 0 to # 7 are allocated to each sector, delay profiles for channels # 0 to # 7 are created for each sector during the delay profile creation period.
- all sectors are assigned channels in the same manner as in sector 1, and therefore description thereof is omitted.
- the delay profile generation control unit 104 sets the period and channel for the delay profile creation of the channel # 0 in the sector S1 in which the mobile station 703 communicates with the base station device 701.
- # Delay profile so that delay profiles are created in the order of Sector S2, Sector S3, Sector S1, Sector S4, Sector S5, Sector S6 so that transmission off period of # 0 does not overlap
- the generator 105 is controlled. As a result, as shown in FIG. 9, the period for creating the delay profile of channel # 0 in sector 1 does not overlap with the transmission off period for channel # 0.
- the order of the sectors for which the delay profile is created is set for one frame, the same order can be used for all the frames thereafter, so that simple processing is performed and the level is high.
- a delay pro that can detect peaks The file can be created reliably, and the reception timing can be reliably detected.
- the base station reference frame in FIG. 11 indicates the reference frame of the base station apparatus, and the delay profile generation timing in FIG. 11 indicates that the delay profile of each sector is created by time division.
- the CM pattern of ch # 0 in Fig. 11 indicates that the transmission off period of channel # 0 occurs at the beginning of each frame for each frame. In FIG. 11, it is assumed that the vehicle moves rightward over time.
- FIG. 11 shows a case where the order of the sectors for creating the delay profile is changed for each frame.
- the delay profile generation control unit 104 creates a delay profile in the order of sector 1, sector 2, sector 3, sector 4, sector 5, and sector 6 in the first frame, and creates sector 5 and sector 6 in the next frame.
- a delay profile is created in the order of Sector 1, Sector 2, Sector 3, and Sector 4, and in the next frame, it is delayed in the order of Sector 3, Sector 4, Sector 5, Sector 6, Sector 1, and Sector 2.
- Create a profile In this way, even if there is a frame in which the transmission off period and the delay profile creation period overlap for a channel of a specific sector, the transmission off period and delay profile are created in other frames. Since the period of time does not overlap, for example, for a specific channel, If a delay profile is created on average, a delay profile can be reliably created for each channel.
- delay profile generation control section 104 creates a delay profile so that the transmission off period in the compressed mode and the period for creating the delay profile do not overlap. Since the order of the sectors is changed, it is possible to prevent a situation where the delay profile of the mobile station cannot be created, and it is possible to reliably detect the reception timing of all the mobile stations.
- the case where the number of sectors is set to six has been described, but the number is not limited to this and can be set to any number.
- the receiving apparatus according to the second embodiment can be applied to the receiving apparatus according to the first embodiment.
- the case where channels # 0 to # 7 are allocated has been described.
- the present invention is not limited to this, and the number of channels can be set to any number.
- the transmission off period and the delay profile creation period in the compressed mode are prevented from overlapping, but the present invention is not limited to this. Thus, when transmission is temporarily stopped, the transmission stop period and the delay profile creation period can be prevented from overlapping.
- the present invention relates to a synchronous processing device and a synchronous processing method, and is particularly suitable for use in a synchronous processing device and a synchronous processing method for creating a delay profile and detecting a reception timing.
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- Synchronisation In Digital Transmission Systems (AREA)
Abstract
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20040728912 EP1564902A1 (en) | 2003-04-25 | 2004-04-22 | Synchronization processing device and synchronization processing method |
| US10/539,633 US20060246928A1 (en) | 2004-04-22 | 2004-04-22 | Synchronization processing apparatus and synchronization processing method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003122475A JP2004328512A (ja) | 2003-04-25 | 2003-04-25 | 同期処理装置及び同期処理方法 |
| JP2003-122475 | 2003-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004098086A1 true WO2004098086A1 (ja) | 2004-11-11 |
Family
ID=33410080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/005792 Ceased WO2004098086A1 (ja) | 2003-04-25 | 2004-04-22 | 同期処理装置及び同期処理方法 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1564902A1 (ja) |
| JP (1) | JP2004328512A (ja) |
| CN (1) | CN1723628A (ja) |
| WO (1) | WO2004098086A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9864399B2 (en) * | 2015-12-10 | 2018-01-09 | Apple Inc. | Timebase synchronization |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003298468A (ja) * | 2002-04-05 | 2003-10-17 | Nec Corp | パスサーチ装置及び方法 |
-
2003
- 2003-04-25 JP JP2003122475A patent/JP2004328512A/ja active Pending
-
2004
- 2004-04-22 EP EP20040728912 patent/EP1564902A1/en not_active Withdrawn
- 2004-04-22 CN CNA2004800016860A patent/CN1723628A/zh active Pending
- 2004-04-22 WO PCT/JP2004/005792 patent/WO2004098086A1/ja not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003298468A (ja) * | 2002-04-05 | 2003-10-17 | Nec Corp | パスサーチ装置及び方法 |
Non-Patent Citations (1)
| Title |
|---|
| "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Multiplexing and channel coding (FDD) (Release 5)", 3GPP TS 25.212 V5.4.0, March 2003 (2003-03-01), pages 53 - 56, XP002980849, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Specs/archive/25_series/25.212/25212-540.zip> [retrieved on 20040713] * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004328512A (ja) | 2004-11-18 |
| EP1564902A1 (en) | 2005-08-17 |
| CN1723628A (zh) | 2006-01-18 |
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