WO2011150764A1 - 信号传输方法、装置和基站 - Google Patents

信号传输方法、装置和基站 Download PDF

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Publication number
WO2011150764A1
WO2011150764A1 PCT/CN2011/074746 CN2011074746W WO2011150764A1 WO 2011150764 A1 WO2011150764 A1 WO 2011150764A1 CN 2011074746 W CN2011074746 W CN 2011074746W WO 2011150764 A1 WO2011150764 A1 WO 2011150764A1
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WIPO (PCT)
Prior art keywords
sectors
sector
virtual
antennas
group
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Application number
PCT/CN2011/074746
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English (en)
French (fr)
Inventor
蔡睿
李江
张劲林
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP11789143.2A priority Critical patent/EP2587687B1/en
Publication of WO2011150764A1 publication Critical patent/WO2011150764A1/zh
Priority to US13/745,183 priority patent/US8855718B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24Cell structures
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0491Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/046Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams

Definitions

  • a wireless communication system generally includes a base station and a user equipment (User Equipment, hereinafter referred to as UE), and communicates between the base station and the UE through electromagnetic waves transmitted and received by the wireless transceiver.
  • the signal sent by the base station to the UE is called a downlink (referred to as: DL) signal, and the signal sent by the UE to the base station is called an uplink (abbreviation: UL) signal.
  • DL downlink
  • UL uplink
  • Each wireless transceiver has a certain coverage, and a base station can communicate with multiple UEs within its coverage.
  • the coverage of a base station is usually referred to as a cell.
  • the total amount of traffic that a cell can support is called the cell capacity.
  • Multiple base stations are linked together by a certain rule to form a wireless communication network with a large coverage. The sum of the cell capacities of each cell included in the wireless communication network is the system capacity of the wireless communication network.
  • An existing networking scheme for increasing system capacity is to combine a multi-sector and multi-antenna approach.
  • the multi-sector method divides one cell into multiple physical sectors, increases the frequency reuse rate by using multiple sectors, thereby improving system capacity;
  • the multi-antenna method utilizes MIMO (Multiple Input Multiple Output) Technology communicates to increase system capacity.
  • MIMO Multiple Input Multiple Output
  • the more the number of sectors corresponding to the base station the fewer the number of antennas per sector, and thus the higher the frequency reuse rate caused by the number of sectors.
  • the inventors of the present invention have found that in a frequency division duplex (FDD) system, when the total number of antennas is the same, for downlink communication, the system capacity gain brought by frequency multiplexing is larger than MIMO.
  • the system capacity gain brought by the gain; and for the uplink communication, the system capacity gain brought by the frequency reuse is smaller than the system capacity gain brought by the MIMO gain. That is to say, in the case where the total number of antennas is the same, the system capacity gain is large when the downlink uses more sectors, and the system capacity gain is larger when the uplink uses fewer sectors.
  • Embodiments of the present invention provide a signal transmission method, apparatus, and base station to solve the existing contradiction between uplink and downlink processing, and improve system capacity of a wireless communication network.
  • a signal transmission method including:
  • the N sectors are created by M sectors for receiving uplink signals, where N>M.
  • a signal transmission apparatus comprising:
  • a creating module configured to create M sectors for receiving an uplink signal into N sectors, where N>M;
  • a sending module configured to send a downlink signal by using the N sectors.
  • a base station including any of the signal transmission devices provided by the embodiments of the present invention.
  • a signal transmission method, apparatus, and base station where a base station is used for receiving
  • the M sectors of the row signal are created into N sectors (N is greater than M), and the downlink signals are transmitted through N sectors, so that the multi-sector technology is used in the downlink, and the multi-antenna technology is used in the uplink. Therefore, the contradiction between the uplink and the downlink when the system capacity is increased can be solved, and the system capacity of the wireless communication network is improved.
  • FIG. 1 is a flowchart of a signal transmission method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a signal transmission method according to another embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a signal transmission apparatus according to another embodiment of the present invention.
  • FIG. 1 is a flowchart of a signal transmission method according to an embodiment of the present invention. As shown in FIG. 1, the method includes:
  • Step 101 Create M sectors for receiving uplink signals into N sectors; where N is greater than M.
  • the M sectors for receiving the uplink signal in this embodiment may be a virtual sector, or may be a physical sector, or may be a combination of a virtual sector and a physical sector; All of them are virtual sectors, and may also be a combination of a virtual sector and a physical sector.
  • the eNB has a plurality of directional antennas, and the directional antennas divide the cells corresponding to the base station into one or more physical sectors, that is, into M physical sectors.
  • This embodiment does not limit the number of sectors in which the cells are divided.
  • the cell can be divided into one or three physical sectors.
  • Each physical sector There are n antennas, where n ⁇ 2, the directions of n antennas in each physical sector are the same, and the directions of antennas in different physical sectors are different.
  • the physical sector is a sector into which a cell is divided into a hardware using a conventional sectorized directional antenna.
  • the base station may create each of the physical sectors into a plurality of virtual sectors, thereby forming a total of N sectors, and the N sectors are virtual fans.
  • the base station may also create each of the physical sectors of any one or more of the physical sectors into a plurality of virtual sectors, thereby forming a total of N sectors, then the N sectors may include the created A virtual sector and a physical sector that is not created as a virtual sector.
  • the process of creating one physical sector into multiple virtual sectors may include: forming a plurality of beams by using a common pilot weighting the physical sector, each beam pointing to a smaller fan a region, thereby forming a plurality of virtual sectors; the directions of the plurality of virtual sectors are different.
  • the physical sector corresponding to the at least one virtual sector may be created into the same method as described above. Multiple virtual sectors.
  • the base station may use the M sectors to receive the uplink signal, which may be: the base station performs centralized scheduling on the users included in each of the M sectors, and then receives the physical antennas through the M sectors.
  • uplink signal may be: the base station performs centralized scheduling on the users included in each of the M sectors, and then receives the physical antennas through the M sectors.
  • Step 102 Send a downlink signal by using N sectors.
  • the base station transmits the downlink signal through the N sectors created in step 101.
  • This embodiment can be applied to an FDD system.
  • an FDD system when the total number of antennas is constant, the capacity gain of multiple sectors in the downlink is greater than the capacity gain of multiple antennas, and the capacity gain of multiple antennas in the uplink is greater than Multi-sector capacity gain.
  • the cell corresponding to the base station is divided into fewer sectors in the uplink, that is, the multi-antenna technology is used in the uplink to increase the uplink system capacity, and the original sector is divided in the downlink. For more sectors, that is, multi-sector technology is used on the downlink to increase the downlink system capacity.
  • multi-antenna technology is to obtain multiple antennas through joint reception and transmission between multiple antennas.
  • the diversity gain, array gain, and spatial multiplexing brought by the processing can effectively improve the average signal-to-noise ratio level of the received signal, resist the fading of the wireless channel, and achieve the purpose of improving the capacity and coverage of the wireless system;
  • the multi-sector technology is to treat a cell.
  • the system is divided into several sectors, so that the cell only receives interference of some cells in the same-frequency cell, which can reduce co-channel interference and improve the frequency reuse rate.
  • the signal transmission method of the embodiment of the present invention uses a plurality of sectors to transmit downlink signals, and uses fewer sectors to receive uplink signals, that is, focuses on multi-sector technology in downlink, and uses multiple antennas in uplink.
  • the technology can solve the contradiction between the uplink and the downlink when the existing system capacity is improved, and improve the coverage and system capacity of the wireless communication network.
  • FIG. 2 is a flowchart of a signal transmission method according to another embodiment of the present invention. As shown in FIG. 2, the method includes:
  • Step 201 S1 of the M sectors used for receiving the uplink signal are respectively included! !
  • Each physical sector in the physical sector of the antenna is created as a virtual sector; the uplink area to be used for reception is created as one virtual sector.
  • i is the sequence number of S1 sectors, ie [l, Sl], Pl 1 > 2, Hl 1 >2; each set of virtual sectors contains Rj virtual sectors, and Rj virtual in each virtual sector
  • the sector corresponds to the same physical sector
  • j is the sequence number of the S2 group sector, je [l, S2], P2J>RJ, ⁇ 3 ⁇ 4 >2; SI > 0, S2 > 0, M
  • the M sectors for receiving uplink signals in the embodiments of the present invention may be physical sectors, virtual sectors, or both physical sectors and virtual sectors.
  • the number of virtual sectors created by each physical sector may be the same or different.
  • the number of virtual sectors created by a sector may be the same or different.
  • both the physical sector and the virtual sector can be created into multiple virtual sectors, at this time S1 ⁇ 0, S2 ⁇ 0.
  • the physical sector in which a plurality of virtual sectors are created includes at least two antennas.
  • the antennas in the physical sectors of the antennas are subjected to common pilot weighting to form beams directed in different directions to form a virtual sector; or the MIMO technology may be used to include the ⁇ 3 ⁇ 4 antennas in the jth group.
  • the two antennas in the physical sector corresponding to the virtual sector are weighted by common pilots to form ⁇ beams pointing in different directions to form ⁇ virtual sectors.
  • the following describes two cases of creating a physical sector into a plurality of virtual sectors and a set of virtual sectors into a plurality of virtual sectors, respectively.
  • the process of ⁇ virtual sectors may be: dividing the antennas in the i-th physical sector into at least one group, each group comprising at least two antennas; ⁇ Set weights to weight each antenna of each group to form? ⁇ beams; each set of weights contains the same number of weights as the number of antennas in each group, and the weighting values are different from each other; the number of sets of weights weighted for each group of antennas is equal to the number of beams formed, that is Equal to the number of virtual sectors formed.
  • the specific creation process can be:
  • a conventional sectorized directional antenna is used in hardware, and a cell corresponding to a base station is divided into three physical sectors, each physical sector has multiple antennas, and a cell pattern of each antenna may be 65 degrees or more;
  • Three physical sectors can be created as six virtual sectors by using MIMO technology: Multiple antennas in each of three physical sectors are divided into k groups, and each group forms two beams (ie, One beam and the second beam, the number of formed beams is the number of virtual sectors formed, each beam points to a smaller sector, the first beam in each group points in the same direction, the second in each group The beams also point in the same direction (ie, the k first beams point in the same direction, forming one virtual sector, and the k second beams point in the same direction to form another virtual sector), which is obtained by 1 physical sector.
  • Two virtual sectors, that is, six virtual sectors are obtained from three physical sectors.
  • the process may be specifically: For a Long Term Evolution (LTE) system, two sets of different weights may be used to weight the common pilot of each physical sector, and the two sets of different weights correspond to two Different cell (cell) IDs, using common pilots, so that the weighted common pilots are staggered in the frequency domain, reducing interference, thereby forming two beams, pointing to two different directions, representing two virtual sectors.
  • the different virtual sectors correspond to different weights.
  • each physical sector includes 6 antennas, and the 6 antennas are divided into 3 Group, there are two antennas in each group, and then each group is formed into two beams, that is, a common beam of two antennas in each group is weighted by one set of weights a and a2 to form one beam, and another set is used.
  • the weights al, and a2 weight the common pilots of the two antennas in each group to form another beam, that is, using two different sets of weights wl ( al, a2 ) and wl, (al,, a2 ,) for each group Two antennas common pilot frequency weighting, to form two beams, thereby realizing two virtual sectors obtained by one physical sector.
  • the base station is called an evolved Node B (abbreviated as: eNodeB).
  • eNodeB evolved Node B
  • the process of creating one virtual sector corresponding to the virtual sector of the jth group into the virtual sectors may be: dividing the antennas in the physical sector into at least one group, each group including At least two antennas; each antenna in each group is weighted by using a set of weights to form a beam; wherein each set of weights includes the same number of weights as the number of antennas in each group, Values are different from each other.
  • the number of sets of weights weighted for each set of antennas is equal to the number of beams formed, that is, equal to the number of virtual sectors formed.
  • Step 202 Send a downlink signal by using N sectors.
  • each of the S1 sectors in the M sectors is created as a virtual sector
  • each of the S2 group sectors in the M sectors is created as a virtual sector.
  • the N sectors include sectors that are not created as virtual sectors and virtual sectors that are created.
  • the base station transmits a downlink signal through the obtained N sectors.
  • each sector (including the sector before the virtual sector is not created and each sector after the creation) may have identification information, for example, may be a cell ID.
  • the base station sends the cell lD of the N sectors to the UE.
  • the UE After receiving the cell ID sent by the base station, the UE selects a cell with good signal quality according to the received signal quality. Accessing the network, and returning the selected cell ID to the base station, the base station can know the cell in which the UE is located according to the cell ID, and can know how to send data to the UE.
  • the base station sends a downlink data signal to multiple UEs in the coverage of the base station by using six virtual sectors, and the downlink capacity is equivalent to the downlink capacity of the physical six sectors, that is, the six virtual sectors and hardware in this embodiment.
  • the performance of the six physical sectors is comparable.
  • the hardware of the embodiment is three physical sectors, which avoids the high antenna installation cost of the six physical sectors and reduces the cost.
  • Step 203 Perform scheduling on the user equipment corresponding to each sector in the M sectors to receive the uplink signal through the M sectors.
  • the base station separately schedules the user equipment corresponding to each physical sector in the S1 physical sectors, and also schedules the user equipment corresponding to each virtual sector in the S2 group virtual sectors, and the base station is not created.
  • the other sectors of the virtual sector are received using the original normal mode, that is, the base station schedules the user equipment corresponding to each sector that is not created as a virtual sector. Thereby, the uplink signal is received through the original M sectors.
  • the base station adjusts the user equipment corresponding to each physical sector in the S1 physical sectors. Specifically, the base station may: according to the identifier (cell ID) of each virtual sector, obtain all user equipment information included in all virtual sectors created by the same physical sector, and then all of the same physical sector. The user equipment performs scheduling and receives the uplink signals sent by the user equipments using antennas of the original physical sector.
  • cell ID the identifier
  • the user equipment performs scheduling and receives the uplink signals sent by the user equipments using antennas of the original physical sector.
  • the scheduling of the user equipment corresponding to each virtual sector in the virtual sector of the S2 group may be: the base station obtains the S2 group fan according to the identifier of each virtual sector in the S2 group sector before the virtual sector is created. All user equipment information included in each virtual sector in the zone, and then respectively schedule all user equipments included in each virtual sector, and receive the user equipments by using the virtual sectors in the original S2 group sectors. Upstream signal.
  • a certain group of sectors in the S2 group sector includes virtual sector 1 (cell ID is ID1) and virtual sector 2 (cell ID is ID1), and the virtual sector 1 and virtual sector 2 correspond to the same physical Sector A;
  • the base station when transmitting the downlink signal, the base station creates the physical sector A as a virtual sector ⁇ , a virtual sector 2, a virtual sector 3, and a virtual sector 4', and utilizes the virtual sector ⁇ , virtual Sector 2', virtual sector 3' and virtual sector 4' transmit downlink signals; while receiving uplink signals, the base station schedules all users in virtual sector 1 and all users in virtual sector 2 Scheduling is performed to enable the use of virtual sector 1 and virtual sector 2 to receive uplink signals.
  • the base station concentrates every two virtual sectors corresponding to the same physical sector in the uplink.
  • the scheduling constitutes a large sector, and the number of receiving antennas of each large sector is ⁇ 0, thereby making the uplink capacity equivalent to the uplink capacity of three physical sectors and NO antennas per physical sector, that is, the uplink in this embodiment
  • centralized scheduling and centralized reception are used to obtain performance equivalent to NO antennas per sector of three physical sectors on the hardware.
  • the embodiment does not limit the timing relationship between step 202 and step 203.
  • the two steps correspond to downlink and uplink respectively.
  • this embodiment combines the advantages of the traditional three-sector and six-sector in performance, so that downlink performance and six sectors Close, uplink performance and three sectors are close, which can solve the contradiction between the downlink and uplink of the existing scheme, improve the coverage of the network and the system capacity; and this embodiment can flexibly operate in three sectors without changing hardware devices and architectures. Conversion between and six sectors reduces costs.
  • the embodiment of the present invention implements conversion from less sectors to multiple sectors in software, it is thus possible to easily degrade from multiple sectors to fewer sectors. For example, if you go down in the future
  • the MIMO technology has been further developed, so that when the total number of antennas is unchanged, the performance of the downlink 3 sectors exceeds 6 sectors, then the number of sectors in the downlink can be reduced, that is, the soft 6 sectors are reduced.
  • the number of virtual sectors that are formed can also directly degrade the soft 6 sectors into 3 sectors. When the soft 6 sector is directly degraded into 3 sectors, that is, the virtual sector is not used to transmit the downlink signal, but the original physical sector is used to directly transmit the downlink signal.
  • the method provided in this embodiment may further include:
  • the number of N sectors used to transmit the downlink signal is reduced to achieve degradation from multiple sectors to fewer sectors.
  • the number of the virtual sectors created in step 201 can be reduced, or the number of the virtual sectors created in step 201 can be reduced to reduce the number of sectors.
  • the number of virtual sectors created by the i-th physical sector in step 201 may be reduced, or the virtual sector created by the i-th physical sector in step 201 may be directly degraded to the original i-th physical. a sector; wherein, when the number of virtual sectors created by the i-th physical sector is reduced to 0, the virtual sector created by the i-th physical sector is directly degenerated into the original i-th physical sector. .
  • the downlink signal After reducing the number of N sectors for transmitting the downlink signal, the downlink signal is transmitted with the reduced sector.
  • the base station creates a downlink signal by using more than one sector by creating M sectors for receiving the uplink signal into N sectors (N is greater than M).
  • N is greater than M.
  • a small number of sectors to receive the uplink signal that is, the multi-sector technology can be used in the downlink, and the multi-antenna technology is used in the uplink, so that the uplink and downlink system capacity can be improved, thereby improving network coverage and capacity;
  • This embodiment can be flexibly in multiple sectors Switching between and fewer sectors makes the base station sectorization more flexible.
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.
  • FIG. 3 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes: a creation module 31 and a transmission module 33.
  • the creating module 31 is configured to create M sectors for receiving uplink signals into N sectors, where N>M.
  • the transmitting module 33 is configured to send a downlink signal through N sectors.
  • the transmitting module transmits the downlink signal by using more than one sector, and uses less sectors to receive the uplink signal, that is, the multi-sector technology is used in the downlink, and the multi-sector technology is used in the uplink.
  • the multi-antenna technology can solve the contradiction between the uplink and the downlink when the existing system capacity is improved, and improve the coverage and system capacity of the wireless communication network.
  • FIG. 4 is a schematic diagram of a signal transmission apparatus according to another embodiment of the present invention. On the basis of the embodiment shown in FIG. 3, as shown in FIG.
  • the creation module 31 includes a first creation module 311 and a second creation module 313.
  • the apparatus can also include a degradation module 35 and a scheduling module 37.
  • the first creating module 311 is configured to create, as a virtual sector, each physical sector in the S1 physical sectors that respectively include antennas in the M sectors, where i is the serial number of the S1 sectors, ie [l,Sl], FU > 2, ⁇ 1 1 > 2 resort
  • the second creation module 313 is configured to create each virtual sector in the virtual sector of the S2 group of the M sectors including the ⁇ 3 ⁇ 4 antennas respectively.
  • S1 > 0, S2 > 0, M > Sl+ ⁇ 0, (M-Sl- ) + , ⁇ +XP2 N.
  • the first creation module 311 is specifically used for the i-th inclusion! !
  • the antennas in the physical sectors of the antennas are weighted by common pilots to form ⁇ beams pointing in different directions to form virtual sectors.
  • the second creating module 313 is specifically configured to perform common pilot weighting on the ⁇ 3 ⁇ 4 antennas in the physical sector corresponding to the virtual sector of the jth group including the ⁇ antennas to form different directions.
  • the first creation module 311 includes a first grouping sub-module 3111 and a first weighting sub-module 3113.
  • the first grouping sub-module 3111 is used to be included! ! ⁇ In the physical sector of the antenna! ! ⁇
  • the antennas are divided into at least one group, each group containing at least two antennas.
  • the first weighting sub-module 3113 is configured to weight each antenna of each group in at least one group by using a weighting value to form a beam, and each set of weights includes the same number of weights as the number of antennas in each group.
  • the second creation module 313 includes a second grouping sub-module 3131 and a second weighting sub-module 3133.
  • the second grouping sub-module 3131 is configured to divide the 13 ⁇ 4 antennas in the physical sector corresponding to the virtual sectors including the antennas into at least one group, and each group includes at least two antennas.
  • 3133 is configured to use weights to weight each antenna of each group in at least one group to form
  • each set of weights contains the same number of weights as the number of antennas in each group.
  • the degradation module 35 is for reducing the number of N sectors used to transmit the downlink signal.
  • the degradation module 35 includes a first reduction module 351 and/or a second reduction module 353.
  • the first reduction module 351 is for reducing the number of virtual sectors created.
  • the second reduction module 353 is used to reduce the number of ⁇ virtual sectors created.
  • the scheduling module 37 is configured to separately schedule the user equipment corresponding to each sector in the sector to receive the uplink signal by using the sector.
  • the transmitting module transmits the message by using more than one sector.
  • the line signal, and the scheduling module uses less sectors to receive the uplink signal, that is, the multi-sector technology is used in the downlink, and the multi-antenna technology is used in the uplink, so that the existing uplink and
  • the contradiction between the downlinks improves the coverage and system capacity of the wireless communication network; and this embodiment can flexibly switch between multiple sectors and fewer sectors, making the base station sectorization more flexible.
  • the embodiment of the present invention further provides a base station, which may include the signal transmission apparatus in the embodiment shown in FIG. 3 or FIG. 4 above.
  • the base station transmits the downlink signal by using more than one sector, and uses less sectors to receive the uplink signal, that is, the multi-sector technology is used in the downlink, and the multi-antenna technology is used in the uplink.
  • the existing contradiction between uplink and downlink when the system capacity is increased can be solved, and the coverage and system capacity of the wireless communication network can be improved; and the embodiment can flexibly switch between multiple sectors and fewer sectors, so that the base station sector More flexible.

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Description

信号传输方法、 装置和基站 本申请要求于 2010 年 07 月 19 日提交中国专利局、 申请号为 201010233062.9、 发明名称为"信号传输方法、 装置和基站"的中国专利申请 的优先权, 其全部内容通过引用结合在本申请中。 技术领域 本发明涉及无线通讯技术领域, 具体涉及一种信号传输方法、 装置和 基站。
背景技术 无线通信系统通常包含基站和用户设备( User Equipment,以下简称为: UE ),基站和 UE之间通过无线收发信机发射和接收的电磁波进行通信。基 站发送给 UE的信号称为下行(downlink, 简称为: DL )信号, UE发送给 基站的信号称为上行(uplink, 简称为: UL )信号。 每个无线收发信机都 有一定的覆盖范围, 一个基站可以和其覆盖范围内的多个 UE进行通信。 通常把一个基站的覆盖范围称为一个小区。 一个小区所能支持的总的业务 量称为小区容量。 多个基站以一定的规则联系在一起可以构成一个较大覆 盖范围的无线通信网络。 无线通信网络中包括的每个小区的小区容量之和 即为无线通信网络的系统容量。
现有的一种提高系统容量的组网方案是将多扇区和多天线的方法相结 合。 其中, 多扇区方法是将一个小区分为多个物理扇区, 利用多扇区提高 频率复用率,从而提高系统容量; 多天线方法是利用 MIMO ( Multiple Input Multiple Output, 多输入多输出)技术进行通信, 以提高系统容量。 在保证 一个基站总天线数不变的情况下, 该基站对应的扇区数越多, 每个扇区的 天线数就越少, 从而由扇区数带来的频率复用率就越高, 而由天线数带来 的 MIMO增益就越小; 该基站对应的扇区数越少, 每个扇区的天线数就越 多, 从而由扇区数带来的频率复用率就越低, 而由天线数带来的 MIMO增 益就越大。
本发明的发明人发现: 在频分复用 ( Frequency Division Duplex, 以下 简称为: FDD ) 系统中, 在总天线数相同的情况下, 对于下行通信, 频率 复用带来的系统容量增益大于 MIMO增益带来的系统容量增益; 而对于上 行通信, 频率复用带来的系统容量增益小于 MIMO增益带来的系统容量增 益。 也就是说, 在总天线数相同的情况下, 下行采用较多扇区时系统容量 增益大, 而上行则采用较少扇区时系统容量增益大。 由此可以看出, 现有 技术中为了提高系统容量, 对上行和下行的处理存在矛盾。
发明内容 本发明实施例提供一种信号传输方法、 装置和基站, 以解决现有的对 上行和下行处理之间的矛盾, 提高无线通信网络的系统容量。
一方面, 提供了一种信号传输方法, 包括:
通过 N个扇区发送下行信号;
其中, 所述 N个扇区由用于接收上行信号的 M个扇区创建成, 所述 N〉M。
另一方面, 提供了一种信号传输装置, 包括:
创建模块, 用于将用于接收上行信号的 M个扇区创建成 N个扇区, 其 中 N〉M;
发送模块, 用于通过所述 N个扇区发送下行信号。
另一方面, 提供了一种基站, 包括本发明实施例提供的任一信号传输 装置。
本发明实施例的信号传输方法、 装置和基站, 基站通过将用于接收上 行信号的 M个扇区创建成 N个扇区 ( N大于 M ) , 并通过 N个扇区发送下 行信号, 使得在下行时侧重利用多扇区技术, 而在上行时侧重利用多天线 技术, 从而可以解决现有的提高系统容量时上行和下行之间的矛盾, 提高 无线通信网络的系统容量。
附图说明 图 1为本发明一实施例提供的信号传输方法的流程图;
图 2为本发明另一实施例提供的信号传输方法的流程图;
图 3为本发明一实施例提供的信号传输装置的示意图;
图 4为本发明另一实施例提供的信号传输装置的示意图。
具体实施方式 为使本发明的目的、 技术方案、 及优点更加清楚明白, 下面结合附图 并举实施例, 对本发明提供的技术方案进一步详细描述。
图 1为本发明一实施例提供的信号传输方法的流程图, 如图 1所示, 该方法包括:
步骤 101、 将用于接收上行信号的 M个扇区创建成 N个扇区; 其中 N 大于 M。
本实施例中的用于接收上行信号的 M个扇区可以是虚拟扇区, 也可以 是物理扇区, 也可以为虚拟扇区和物理扇区的组合; 创建成的 N个扇区, 可以均为虚拟扇区, 也可以为虚拟扇区和物理扇区的组合; 下面以用于接 收上行信号的 M个扇区均为物理扇区为例进行说明。
基站中有多个定向天线, 由这些定向天线将基站所对应的小区分为一 个或多个物理扇区, 即分成 M个物理扇区, 本实施例并不限定将小区划分 的扇区数, 例如可以将该小区分为 1个或者 3个物理扇区。 每个物理扇区 中包含 n个天线, 其中 n≥2, 每个物理扇区中的 n个天线的方向相同, 不同 物理扇区中的天线的方向不同。 其中, 物理扇区为在硬件上采用传统扇区 化定向天线将小区划分成的扇区。
当基站覆盖的小区被划分为 M个物理扇区时, 基站可以将其中每一个 物理扇区创建成多个虚拟扇区, 由此总共形成 N个扇区, 这 N个扇区均为 虚拟扇区; 基站也可以将其中任意一个或多个物理扇区中的每一个物理扇 区创建成多个虚拟扇区, 由此总共形成 N个扇区, 那么这 N个扇区可以包 括创建成的虚拟扇区和未创建成虚拟扇区的物理扇区。
其中, 将一个物理扇区创建成多个虚拟扇区的过程可以包括: 通过对 该物理扇区的公共导频加权, 将该物理扇区形成多个波束, 每个波束指向 一个更小的扇区, 从而形成多个虚拟扇区; 这多个虚拟扇区的方向不同。
当用于接收上行信号的 M个扇区存在对应同一个物理扇区的至少一组 虚拟扇区时, 可以采用与上述相同的方法将这至少一组虚拟扇区对应的物 理扇区创建成更多个虚拟扇区。
对于上行链路, 基站可以利用 M个扇区接收上行信号, 具体可以为: 基站对这 M个扇区中每个扇区所包括的用户进行集中调度, 然后通过 M个 扇区的物理天线接收上行信号。
步骤 102、 通过 N个扇区发送下行信号。
基站通过步骤 101中创建好的 N个扇区发送下行信号。
本实施例可以应用于 FDD系统, 而在 FDD系统中, 在天线总数一定 的情况下, 下行链路中多扇区的容量增益大于多天线的容量增益, 上行链 路中多天线的容量增益大于多扇区的容量增益。 本实施例在上行链路中将 基站对应的小区划分为较少的扇区, 即在上行链路使用多天线技术, 以增 加上行的系统容量, 在下行链路中将原有的扇区划分为较多的扇区, 即在 下行链路使用多扇区技术, 以增加下行的系统容量。
其中, 多天线技术是通过多个天线之间的联合接收和发射获得多天线 处理带来的分集增益、 阵列增益, 空间复用, 能够有效的提高接收信号的 平均信噪比水平, 抵抗无线信道衰落, 达到提高无线系统容量和覆盖的目 的; 多扇区技术是将一个小区分成几个扇区, 使得该小区只接收同频小区 中一部分小区的干扰, 可以减少同频干扰, 提高频率复用率。
本发明实施例的信号传输方法, 通过使用较多个扇区发送下行信号, 并使用较少个扇区来接收上行信号, 即在下行时侧重利用多扇区技术, 在 上行时侧重利用多天线技术, 从而可以解决现有的提高系统容量时上行和 下行之间的矛盾, 提高无线通信网络的覆盖和系统容量。
图 2为本发明另一实施例提供的信号传输方法的流程图, 如图 2所示, 该方法包括:
步骤 201、 将用于接收上行信号的 M个扇区中的 S1个分别包含!!^个 天线的物理扇区中的每个物理扇区创建成 ^个虚拟扇区;将用于接收上行 区创建成 Ρ 个虚拟扇区。
其中 i为 S1个扇区的序号, ie [l,Sl],Pl1 > 2, Hl1 > 2; 每组虚拟扇区包 含 Rj个虚拟扇区, 并且每组虚拟扇区中的 Rj个虚拟扇区对应同一个物理扇 区, j为 S2组扇区的序号, j e [l,S2], P2J>RJ , Η¾ > 2; SI > 0, S2 > 0, M
> Sl+ £i?.〉0, (Μ-Sl- · ) +£ΡΙ,· +∑P2j =N。
=1 !=1
本发明各实施例中的用于接收上行信号的 M个扇区可以是物理扇区, 也可以是虚拟扇区, 还可以是既包括物理扇区也包括虚拟扇区。
当 M个扇区都是物理扇区时, 可以将这 M个物理扇区中的 S 1个物理 扇区中的每个扇区创建成多个虚拟扇区, 此时 S2= 0; 其中, 每一个物理扇 区创建的虚拟扇区的数量可以相同, 也可以不同。
当 M个扇区都是虚拟扇区时, 可以将这 M个虚拟扇区中的 S2组虚拟扇 区中的每组虚拟扇区创建成更多个虚拟扇区, 此时 S1= 0; 其中, 每组虚拟 扇区创建的虚拟扇区的数量可以相同, 也可以不同。
当 M个扇区既包括物理扇区也包括虚拟扇区时, 可以将其中的物理扇 区和虚拟扇区都创建成多个虚拟扇区, 此时 S1≠0, S2≠0。
其中创建成多个虚拟扇区的物理扇区中至少包括两个天线。
可以通过 MIMO技术, 对第 i个所述包含!!^个天线的物理扇区中的 个天线进行公共导频加权, 形成指向不同方向的 ^个波束, 以形成 个虚拟扇区; 也可以通过 MIMO技术, 对第 j组所述包含 Η¾个天线的虚 拟扇区对应的物理扇区中的 Η 个天线进行公共导频加权,形成指向不同方 向的 Ρ 个波束, 以形成 Ρ 个虚拟扇区。
下面分别对将物理扇区创建成多个虚拟扇区和将一组虚拟扇区创建成 多个虚拟扇区这两种情况进行详细描述。
第一种情况: 上述将第 i个物理扇区创建成?^个虚拟扇区的过程可以 为:将第 i个物理扇区中的 天线分为至少一组,每组包含至少两个天线; 利用?^套权值对每组的各个天线进行加权, 以形成?^个波束; 每套权值 包含的权值的数量与每组中天线的数量相同, 套权值互不相同; 为每组 天线加权的权值的套数, 等于形成的波束的数量, 也就是等于形成的虚拟 扇区的数量。
在一具体实施方式中, N可以为 M的整数倍, S1=M, Pl N/Sl , S2=0。 例如: 小区包括 3 ( M=3 )个物理扇区, 基站把每个物理扇区都创建为 2个 虚拟扇区(即把 3个物理扇区创建为 6 ( N=6 )个虚拟扇区)。 具体的创建 过程可以为:
在硬件上采用传统扇区化定向天线, 把一基站对应的小区分为 3 个物 理扇区, 每个物理扇区有多个天线, 每个天线的单元方向图可以为 65度或 更宽;
利用 MIMO技术可以将 3个物理扇区创建为 6个虚拟扇区: 把 3个物 理扇区中每个物理扇区中的多个天线分成 k组, 每组形成两个波束(即第 一波束和第二波束, 形成波束的数量即为形成虚拟扇区的数量) , 每个波 束指向一个更小的扇区, 每组中的第一波束指向同一个方向, 每组中的第 二波束也指向同一个方向 (即 k个第一波束指向同一个方向, 形成一个虚 拟扇区, k个第二波束指向同一个方向, 形成另一个虚拟扇区) , 从而由 1 个物理扇区得到 2个虚拟扇区, 也就是由 3个物理扇区得到 6个虚拟扇区。 该过程具体可以为: 对于长期演进( Long Term Evolution, 简称为: LTE ) 系统, 可以利用两套不同的权值对每个物理扇区的公共导频加权, 这两套 不同的权值对应两个不同的 cell (小区) ID, 同时采用公共导频, 使加权 后的公共导频在频域上错开, 减少干扰, 从而形成两个波束, 指向两个不 同的方向, 代表两个虚拟扇区, 不同的虚拟扇区对应不同的权值; 上述由 每个物理扇区得到两个虚拟扇区的过程例如可以为: 例如每个物理扇区包 括 6个天线, 将这 6个天线分为 3组, 每组中有两个天线, 然后将每组形 成两个波束,即利用一套权值 al和 a2对每组中的两个天线的公共导频进行 加权形成一个波束, 利用另一套权值 al,和 a2,对每组中的两个天线的公共 导频进行加权, 形成另一个波束, 也就是利用不同的两套权值 wl ( al,a2 ) 和 wl, (al,,a2,)对每组中的两个天线的公共导频进行加权, 以形成两个波 束, 由此实现了由一个物理扇区得到两个虚拟扇区。
其中, 在 LTE系统中, 基站称为演进的节点 B ( Evolution Node B, 简 称为: eNodeB ) 。
第二种情况: 上述将第 j组虚拟扇区对应的一个物理扇区创建成 Ρ 个 虚拟扇区的过程可以为: 将该物理扇区中的 Η 个天线分为至少一组,每组 包含至少两个天线; 利用 Ρ 套权值对每组中的各个天线进行加权, 以形成 ? 个波束; 其中, 每套权值包含的权值的数量与每组中天线的数量相同, Ρ 套权值互不相同。 为每组天线加权的权值的套数, 等于形成的波束的数 量, 也就是等于形成的虚拟扇区的数量。 更具体的创建过程参见上述将第 i 个物理扇区创建为多个虚拟扇区的过程, 在此不再赘述。 步骤 202、 通过 N个扇区发送下行信号。
在步骤 201 中将 M个扇区中的 S1个扇区中的每个扇区创建成了 个虚拟扇区,将 M个扇区中的 S2组扇区中每组扇区创建成了 Ρ 个虚拟扇 区, 由此得到了 N个扇区, 其中, N = (M-Sl- ^i?. ) +∑P2j。 也就
=1
是说, 这 N个扇区包括未创建成虚拟扇区的扇区和创建成的虚拟扇区。 基 站通过得到的 N个扇区发送下行信号。
需要说明的是, 每个扇区 (包括未创建虚拟扇区前的扇区和创建后的 每个扇区 )都可以具有标识信息, 例如可以为 cell ID。
基站通过 N个扇区发送下行信号的过程中, 基站将 N个扇区的 cell lD 发送给 UE, UE接收到基站下发的 cell ID后, 根据接收到的信号质量选择 一信号质量好的 cell接入网络, 并向基站返回选择的 cell ID, 基站根据该 cell ID可知该 UE位于的小区(cell), 并可知如何给该 UE发送数据。
例如,基站通过六虚拟扇区向基站覆盖范围内的多个 UE发送下行数据 信号, 该下行容量与物理上的六扇区的下行容量相当, 即本实施例中的六 虚拟扇区与硬件上的六物理扇区性能相当。 然而与硬件上的六物理扇区相 比, 本实施例硬件上是三物理扇区, 避免了六物理扇区较高的天线安装费 用, 降低了成本。
步骤 203、分别对 M个扇区中各个扇区对应的用户设备进行调度, 以通 过 M个扇区接收上行信号。
基站分别对 S1 个物理扇区中的每个物理扇区对应的用户设备进行调 度, 也分别对 S2组虚拟扇区中的每个虚拟扇区对应的用户设备进行调度, 并且基站对于没有创建成虚拟扇区的其他扇区使用原有的正常模式进行接 收, 即基站对没有创建成虚拟扇区的每个扇区对应的用户设备进行调度。 由此实现了通过原来的 M个扇区接收上行信号。
其中,基站对 S1个物理扇区中的每个物理扇区对应的用户设备进行调 度具体可以为: 基站根据每个虚拟扇区的标识(cell ID ), 可以得到由同一 个物理扇区创建的所有虚拟扇区所包含的所有用户设备信息, 然后对同一 个物理扇区的所有用户设备进行调度, 并使用原物理扇区的天线接收这些 用户设备发送的上行信号。
基站对 S2组虚拟扇区中的每个虚拟扇区对应的用户设备进行调度具体 可以为: 基站根据创建虚拟扇区之前的 S2组扇区中每个虚拟扇区的标识, 得到这 S2组扇区中的每个虚拟扇区所包含的所有用户设备信息, 然后分别 对每个虚拟扇区所包含的所有用户设备进行调度, 并使用原 S2组扇区中的 虚拟扇区接收这些用户设备发送的上行信号。 例如: S2组扇区中的某组扇 区包括虚拟扇区 1 ( Cell ID为 ID1 )和虚拟扇区 2 ( Cell ID为 ID1 ) , 且该 虚拟扇区 1和虚拟扇区 2对应同一个物理扇区 A; 在发送下行信号时, 基 站将该物理扇区 A创建成虚拟扇区 Γ、 虚拟扇区 2,、 虚拟扇区 3,和虚拟扇 区 4', 并利用虚拟扇区 Γ、 虚拟扇区 2'、 虚拟扇区 3'和虚拟扇区 4'发送下 行信号; 而在接收上行信号时, 基站对虚拟扇区 1中的所有用户进行调度, 并对虚拟扇区 2中的所有用户进行调度, 以实现利用虚拟扇区 1和虚拟扇 区 2来接收上行信号。
在上述将 3物理扇区创建成 6虚拟扇区的例子中, 在下行形成 6个虚 拟扇区后, 在上行链路中基站对与同一个物理扇区对应的每两个虚拟扇区 进行集中调度构成一个大扇区, 每个大扇区的接收天线数为 Ν0, 由此使得 上行容量与三物理扇区、每物理扇区 NO个天线的上行容量相当, 即本实施 例中上行链路对与同一个物理扇区对应的两个虚拟扇区, 采用集中调度集 中接收, 获取了与硬件上的三物理扇区每扇区 NO个天线相当的性能。
其中, 本实施例并不限定步骤 202和步骤 203的时序关系, 这两个步 骤分别对应下行和上行链路。
以利用 MIMO技术将 3个物理扇区创建为 6个虚拟扇区为例, 本实施 例在性能上结合了传统的三扇区和六扇区的优点, 使得下行性能和六扇区 接近, 上行性能和三扇区接近, 可以解决现有方案下行和上行的矛盾, 提 高网络的覆盖和系统容量; 并且本实施例可以不需要改动硬件设备和架构, 就能灵活地在三扇区和六扇区之间转换, 降低了成本。
更进一步地, 由于本发明实施例是在软件上实现从少扇区到多扇区的 转化, 从而也就可以方便地从多扇区退化到少扇区。 例如, 将来如果下行
MIMO技术有更进一步的发展, 以至在总天线数不变的情况下, 下行的 3 扇区的性能超过了 6扇区, 那么可以减少下行的扇区数, 即减少软的 6扇 区 (创建成的虚拟扇区)的数量, 也可以将软的 6扇区直接退化成 3扇区。 将软的 6扇区直接退化成 3扇区时, 就是说不使用虚拟扇区发送下行信号, 而是直接使用原来的物理扇区发送下行信号。
由此, 本实施例提供的方法进一步还可以包括:
减少用于发送下行信号的 N个扇区的数量, 以实现从多扇区退化到少 扇区。 具体的, 可以通过减少步骤 201中创建的 个虚拟扇区的个数, 或 者通过减少步骤 201中创建的 Ρ 个虚拟扇区的个数,以实现减少 Ν个扇区 的数量。例如: 可以减少步骤 201中第 i个物理扇区创建成的虚拟扇区的个 数,也可以将步骤 201中第 i个物理扇区创建成的虚拟扇区直接退化为原来 的第 i个物理扇区; 其中, 将第 i个物理扇区创建的虚拟扇区的个数减为 0 时, 相当于将第 i个物理扇区创建的虚拟扇区直接退化为原来的第 i个物理 扇区。
在减少了用于发送下行信号的 N个扇区的数量之后, 用减少后的扇区 发送下行信号。
本发明实施例的信号传输方法, 基站通过将用于接收上行信号的 M个 扇区创建成 N个扇区 (N大于 M ) , 实现了使用由较多个扇区发送下行信 号, 并使用较少个扇区来接收上行信号, 即可以实现在下行时侧重利用多 扇区技术, 而在上行时侧重利用多天线技术, 使得可以提高上行和下行的 系统容量, 从而提高网络覆盖和容量; 并且本实施例可以灵活的在多扇区 和少扇区之间转换, 使得基站扇区化更为灵活。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机 可读取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 前述的存储介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序代 码的介质。
图 3为本发明一实施例提供的信号传输装置的示意图, 如图 3所示, 该装置包括: 创建模块 31和发送模块 33。
创建模块 31用于将用于接收上行信号的 M个扇区创建成 N个扇区, 其中 N〉M。 发送模块 33用于通过 N个扇区发送下行信号。
本实施例中各个模块的工作流程和工作原理参见上述各方法实施例中 的描述, 在此不再赘述。
本发明实施例的信号传输装置, 发送模块通过使用较多个扇区发送下 行信号, 并且使用较少个扇区来接收上行信号, 即在下行时侧重利用多扇 区技术, 在上行时侧重利用多天线技术, 从而可以解决现有的提高系统容 量时上行和下行之间的矛盾, 提高无线通信网络的覆盖和系统容量。
图 4为本发明另一实施例提供的信号传输装置的示意图, 在图 3所示 的实施例的基础上, 如图 4所示,
创建模块 31包括第一创建模块 311和第二创建模块 313。 该装置还可 以包括退化模块 35和调度模块 37。
第一创建模块 311用于将 M个扇区中的 S 1个分别包含 个天线的物 理扇区中的每个物理扇区创建成 个虚拟扇区, 其中 i为 S1个扇区的序 号, ie [l,Sl], FU > 2, Η11 > 2„ 第二创建模块 313用于将 M个扇区中的 S2 组分别包含 Η¾个天线的虚拟扇区中的每组虚拟扇区创建成 Ρ 个虚拟扇 区; 其中, 每组虚拟扇区包含 个虚拟扇区, 并且每组虚拟扇区中的 个 虚拟扇区对应同一个物理扇区, j为 S2组扇区的序号, j e [l,S2], P2J>RJ , H > 2。 S1 > 0, S2 > 0, M > Sl+ 〉0, (M-Sl- ) + ,· +XP2 =N。
=1 !=1
第一创建模块 311具体用于对第 i个包含!!^个天线的物理扇区中的 个天线进行公共导频加权, 形成指向不同方向的 ^个波束, 以形成 个虚拟扇区。 第二创建模块 313具体用于对第 j组包含 Η 个天线的虚拟扇 区对应的物理扇区中的 Η¾个天线进行公共导频加权,形成指向不同方向的
Ρ¾个波束, 以形成 Ρ 个虚拟扇区。
第一创建模块 311包括第一分组子模块 3111和第一加权子模块 3113。 第一分组子模块 3111用于将包含!!^个天线的物理扇区中的!!^个天 线分为至少一组, 每组包含至少两个天线。 第一加权子模块 3113用于利用 套权值对至少一组中每组的各个天线进行加权, 以形成 ^个波束, 每 套权值包含的权值的数量与每组中天线的数量相同。
第二创建模块 313包括第二分组子模块 3131和第二加权子模块 3133。 第二分组子模块 3131用于将包含 Η 个天线的虚拟扇区对应的物理扇 区中的 1¾个天线分为至少一组,每组包含至少两个天线。第二加权子模块
3133 用于利用 Ρ 套权值对至少一组中每组的各个天线进行加权, 以形成
Ρ¾个波束, 每套权值包含的权值的数量与每组中天线的数量相同。
退化模块 35用于减少用于发送下行信号的 N个扇区的数量。
退化模块 35包括第一减少模块 351和 /或第二减少模块 353。
第一减少模块 351用于减少创建的 个虚拟扇区的个数。第二减少模 块 353用于减少创建的 Ρ 个虚拟扇区的个数。
调度模块 37 用于分别对 Μ个扇区中各个扇区对应的用户设备进行调 度, 以通过 Μ个扇区接收上行信号。
本实施例中各个模块和单元的工作流程和工作原理参见上述各方法实 施例中的描述, 在此不再赘述。
本发明实施例的信号传输装置, 发送模块通过使用较多个扇区发送下 行信号, 并且通过调度模块使用较少个扇区来接收上行信号, 即在下行时 侧重利用多扇区技术, 在上行时侧重利用多天线技术, 从而可以解决现有 的提高系统容量时上行和下行之间的矛盾, 提高无线通信网络的覆盖和系 统容量; 并且本实施例可以灵活的在多扇区和少扇区之间转换, 使得基站 扇区化更为灵活。
本发明实施例还提供了一种基站, 该基站可以包括上述图 3或图 4所 示实施例中的信号传输装置。
本实施例中各个模块和单元的工作流程和工作原理参见上述各方法实 施例中的描述, 在此不再赘述。
本发明实施例, 基站通过使用较多个扇区发送下行信号, 并且使用较 少个扇区来接收上行信号, 即在下行时侧重利用多扇区技术, 在上行时侧 重利用多天线技术, 从而可以解决现有的提高系统容量时上行和下行之间 的矛盾, 提高无线通信网络的覆盖和系统容量; 并且本实施例可以灵活的 在多扇区和少扇区之间转换, 使得基站扇区化更为灵活。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修 改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不 使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种信号传输方法, 其特征在于, 包括:
通过 N个扇区发送下行信号;
其中, 所述 N个扇区由用于接收上行信号的 M个扇区创建成, 所述 N〉M。
2、 根据权利要求 1所述的信号传输方法, 其特征在于, 通过以下方式 将用于接收上行信号的 M个扇区创建成 N个扇区:
将所述 M个扇区中的 S1个分别包含 个天线的物理扇区中的每个物 理扇区创建成 个虚拟扇区, 其中 i为 S1个扇区的序号, ie[l,Sl], FU >2, Hl1>2; 拟扇区创建成 Ρ 个虚拟扇区, 其中, 每组虚拟扇区包含 Rj个虚拟扇区, 并且每组虚拟扇区中的 个虚拟扇区对应同一个物理扇区, j为 S2组扇区 的序号, je[l,S2], P2J>RJ, Η¾>2;
其中, SI S2 M>SI+ JRJ>0,
Figure imgf000016_0001
3、 根据权利要求 2所述的信号传输方法, 其特征在于, 所述 N为 M 的整数倍, S1=M, Pl N/Sl, S2
4、 根据权利要求 2所述的信号传输方法, 其特征在于, 通过以下方式 将第 i个所述包含!!^个天线的物理扇区创建成 个虚拟扇区:
对第 i个所述包含!!^个天线的物理扇区中的 个天线进行公共导频 加权, 形成指向不同方向的 ^个波束, 以形成 个虚拟扇区。
5、 根据权利要求 2所述的信号传输方法, 其特征在于, 通过以下方式 将第 j组所述包含 Η 个天线的虚拟扇区创建成 Ρ 个虚拟扇区:
对第 j组所述包含 Η 个天线的虚拟扇区对应的物理扇区中的 Η 个天 线进行公共导频加权, 形成指向不同方向的 个波束, 以形成 Ρ 个虚拟 扇区。
6、 根据权利要求 4所述的信号传输方法, 其特征在于, 通过以下方式 对第 i个所述包含!!^个天线的物理扇区中的 个天线进行公共导频加权: 将所述包含!!^个天线的物理扇区中的!!^个天线分为至少一组,每组 包含至少两个天线;
利用 套权值对所述至少一组中每组的各个天线进行加权, 以形成 个所述波束, 每套权值包含的权值的数量与每组中天线的数量相同。
7、 根据权利要求 5所述的信号传输方法, 其特征在于, 通过以下方式 对第 j组所述包含 Η 个天线的虚拟扇区对应的物理扇区中的 Η 个天线进 行公共导频加权: 至少一组, 每组包含至少两个天线;
利用 Ρ 套权值对所述至少一组中每组的各个天线进行加权, 以形成 Ρ 个所述波束, 每套权值包含的权值的数量与每组中天线的数量相同。
8、 根据权利要求 1-7任一所述的信号传输方法, 其特征在于, 通过以 下方式通过所述 Μ个扇区接收上行信号:
分别对所述 Μ个扇区中各个扇区对应的用户设备进行调度, 以通过所 述 Μ个扇区接收上行信号。
9、根据权利要求 2-7任一所述的信号传输方法, 其特征在于, 还包括: 减少用于发送下行信号的所述 Ν个扇区的数量。
10、 根据权利要求 9所述的信号传输方法, 其特征在于, 通过以下方 式减少所述 Ν个扇区的数量:
减少创建的所述 PL个虚拟扇区的个数, 和 /或减少创建的 个虚拟扇 区的个数, 以减少所述 N个扇区的数量。
11、 一种信号传输装置, 其特征在于, 包括: 创建模块, 用于将用于接收上行信号的 M个扇区创建成 N个扇区, 其 中 N〉M;
发送模块, 用于通过所述 N个扇区发送下行信号。
12、 根据权利要求 11所述的信号传输装置, 其特征在于, 所述创建模 块包括:
第一创建模块,用于将所述 M个扇区中的 S1个分别包含!!^个天线的 物理扇区中的每个物理扇区创建成 个虚拟扇区, 其中 i为 S1个扇区的 序号,
Figure imgf000018_0001
Hl1>2;
第二创建模块,用于将所述 M个扇区中的 S2组分别包含 Η 个天线的 虚拟扇区中的每组虚拟扇区创建成 Ρ 个虚拟扇区; 其中, 每组虚拟扇区包 含 Rj个虚拟扇区, 并且每组虚拟扇区中的 Rj个虚拟扇区对应同一个物理扇 区, j为 S2组扇区的序号, je[l,S2], P2J>RJ, Η¾>2;
其中, SI >0, S2>0,M> Sl+¾ ?. 〉0,(M-Sl-X?)+ l, +∑P2 =N。
13、 根据权利要求 12所述的信号传输装置, 其特征在于,
所述第一创建模块具体用于对第 i个所述包含!!^个天线的物理扇区中 的 个天线进行公共导频加权, 形成指向不同方向的 ^个波束, 以形成 个虚拟扇区。
14、 根据权利要求 12所述的信号传输装置, 其特征在于,
所述第二创建模块具体用于对第 j组所述包含 Η 个天线的虚拟扇区对 应的物理扇区中的 Η 个天线进行公共导频加权, 形成指向不同方向的 Ρ 个波束, 以形成 Ρ 个虚拟扇区。
15、 根据权利要求 13所述的信号传输装置, 其特征在于, 所述第一创 建模块包括:
第一分组子模块,用于将所述包含!!^个天线的物理扇区中的!!^个天 线分为至少一组, 每组包含至少两个天线; 第一加权子模块,用于利用 套权值对所述至少一组中每组的各个天 线进行加权, 以形成 个所述波束, 每套权值包含的权值的数量与每组中 天线的数量相同。
16、 根据权利要求 14所述的信号传输装置, 其特征在于, 所述第二创 建模块包括:
第二分组子模块,用于将所述包含 Η 个天线的虚拟扇区对应的物理扇 区中的 11 个天线分为至少一组, 每组包含至少两个天线;
第二加权子模块,用于利用 Ρ 套权值对所述至少一组中每组的各个天 线进行加权, 以形成 Ρ 个所述波束, 每套权值包含的权值的数量与每组中 天线的数量相同。
17、根据权利要求 11-16任一所述的信号传输装置, 其特征在于, 还包 括: 调度, 以通过所述 Μ个扇区接收上行信号。
18、根据权利要求 11-16任一所述的信号传输装置, 其特征在于, 还包 括:
退化模块, 用于减少用于发送下行信号的所述 Ν个扇区的数量。
19、 根据权利要求 18所述的信号传输装置, 其特征在于, 所述退化模 块包括:
第一减少模块, 用于减少创建的所述 个虚拟扇区的个数; 和 /或 第二减少模块, 用于减少创建的 Ρ 个虚拟扇区的个数。
20、 一种基站, 包括权利要求 11-19任一项所述的信号传输装置。
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US20130130703A1 (en) 2013-05-23
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US8855718B2 (en) 2014-10-07

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