WO2008034330A1 - Procédé de combinaison de signaux de liaison montante en mode de division de secteur et système de station de base associé - Google Patents

Procédé de combinaison de signaux de liaison montante en mode de division de secteur et système de station de base associé Download PDF

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Publication number
WO2008034330A1
WO2008034330A1 PCT/CN2007/002561 CN2007002561W WO2008034330A1 WO 2008034330 A1 WO2008034330 A1 WO 2008034330A1 CN 2007002561 W CN2007002561 W CN 2007002561W WO 2008034330 A1 WO2008034330 A1 WO 2008034330A1
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WIPO (PCT)
Prior art keywords
unit
combining
signal
uplink
board
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Application number
PCT/CN2007/002561
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English (en)
French (fr)
Inventor
Jianzhong Yao
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to EP07800780A priority Critical patent/EP1954075A4/en
Priority to JP2008546083A priority patent/JP2009520417A/ja
Publication of WO2008034330A1 publication Critical patent/WO2008034330A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the present invention relates to a base station networking technology in the field of wireless communication, and more particularly to a method and a base station system for uplink signal combining in a sector splitting mode. Background technique
  • the design method of the base station tends to the baseband processing unit.
  • the Radio Radio Unin (Base Band Uni t, or BBU for short) is separated from the radio frequency, which is the radio remote technology.
  • the Radio Radio Unin (RRU) is a typical application based on the radio remote technology.
  • the RRU can solve the problem of equipment location difficulty and cable loss, and improve the transmit power of the antenna port.
  • the radio remote technology enables the radio part of the base station and the wireless signal processing part to be separated, that is, the RRU of the radio remote unit can be installed away from the BBU, which provides an unprecedented flexibility for the operator to construct the network.
  • the power consumption of the transmitter at the last stage of the base station system is reduced by nearly 50%, and the transmission line cost and installation cost are also reduced by 30% to 70%.
  • each RRU When coverage is performed in a specific area (for example, indoor coverage), multiple RRUs are used to cover different areas. As shown in Figure 1, the coverage area of each RRU belongs to the same cell. This coverage is called sector splitting. Among them, the interface between the RRU and the BBU uses a digital signal (IQ signal) to ensure the signal-to-noise ratio.
  • IQ signal digital signal
  • the coverage mode of sector splitting is mainly applied to indoor coverage, while the indoor wireless environment is relatively stable. Therefore, the antenna receiving diversity mode is usually not used, that is, each RRU only needs one single-polarized antenna, so each frequency of each RRU The point only requires a routed antenna and carrier pair that is uniquely determined by the uplink IQ signal (ie, the A*C signal).
  • the baseband processing part can process at least two uplink IQ signals, wherein the signal bandwidth of each cell in each uplink IQ signal is always B m i n .
  • the uplink signals sent by the RRU are not combined, so a large number of RRU. It can be seen from FIG. 1 that when the number of RRUs is large, the uplink signals in the sector split mode need to be combined and then sent to the BBU for processing.
  • the process of combining the uplink signals is a process of adding two digital signals, and there is inevitably a problem of resource consumption and signal-to-noise ratio reduction. Therefore, there is a need for a feasible uplink signal combining method to reduce the signal loss of the combined path. Summary of the invention
  • One of the objectives of the present invention is to provide a method for combining uplink signals in a sector splitting manner according to the above-mentioned deficiencies of the prior art, which can combine the uplink signals of the RRUs in a sector splitting manner and then send them to the uplink signals of the RRUs.
  • the BBU performs processing and can effectively reduce resource loss and signal loss.
  • the second object of the present invention is to provide a corresponding base station system for performing the combined processing of the uplink signals generated by the radio remote unit RRU, and can effectively reduce resource loss and signal loss.
  • an embodiment of the present invention provides a method for combining uplink signals in a sector splitting manner, including: combining the uplink signals sent by the remote radio unit, and adjusting according to the bandwidth limitation of the upper node. After the bandwidth of the combined signal, the processed uplink signal is sent to the baseband processing unit, and the baseband processing unit processes the uplink signal.
  • the adjusting the bandwidth of the combined signal according to the bandwidth limitation of the upper node may include: determining whether the bandwidth of the combined signal meets the bandwidth required by the preset signal to noise ratio of the upper node; If it is met, the bandwidth is not adjusted. If it is not, the bandwidth of the combined signal is adjusted to the bandwidth required by the signal-to-noise ratio of the preset superior node by the digital gain correction method.
  • the combining the uplink signals sent by the radio remote unit may include: the radio remote unit combines the received uplink signal sent by the lower node with the uplink signal sent by the user equipment.
  • the combining the uplink signals sent by the radio remote unit may also include: a radio frequency signal exchange unit disposed between the radio remote unit and the baseband processing unit, and the radio frequency received by each port of the radio frequency signal exchange unit The uplink signals sent by the far unit are combined. Pulling the radio to the far single
  • the uplink signal sent by the element may further include: a radio frequency signal exchange unit disposed between the radio remote unit and the baseband processing unit, and an uplink signal sent by the radio remote unit received by each port of the radio frequency signal exchange unit Make a joint road.
  • the combining of the uplink signals sent by the radio remote unit may further include: the board provided with the baseband processing unit combining the uplink signals sent by the radio remote unit received by each port of the board.
  • the combining the uplink signals sent by the radio remote unit may further include: combining the uplink signals sent by the radio remote unit between the boards provided with the baseband processing unit.
  • an embodiment of the present invention further provides a base station system, including a board provided with a baseband processing unit, and a radio remote unit connected to the board, and further configured to send the radio remote unit
  • the uplink signal is combined with the combining unit; the combining unit is further provided with a bandwidth adjusting unit for adjusting the bandwidth of the combined signal according to the bandwidth limitation of the upper node.
  • the combining unit for combining the uplink signals sent by the radio remote unit may further be provided with a bandwidth adjusting unit for adjusting the bandwidth of the combined signals according to the bandwidth limitation of the upper node.
  • the combining unit for combining the uplink signals sent by the radio remote unit may be disposed in the radio remote unit.
  • the base station system may further include a radio frequency signal exchange unit, and is connected to the single board and the radio remote unit, and the combining unit for combining the uplink signals sent by the radio remote unit is disposed in the In the RF signal exchange unit.
  • the combining unit for combining the uplink signals sent by the radio remote unit may also be disposed in the board, and is connected to each port of the board and the baseband processing unit.
  • the combining unit may include a primary combining unit for combining an uplink signal received by each port of the board into two signals.
  • the combining unit may further include a secondary combining unit, which is connected to the primary combining unit and the baseband processing unit, and the secondary combining unit is configured to transmit the uplink after the combined processing of the other boards.
  • the signal is combined with the uplink signal received by other ports of the board after one combined processing into two signals.
  • the uplink signal sent by the radio remote unit is combined in the radio remote unit or the radio frequency signal exchange unit or the board with the baseband processing unit, so that the actual hardware resources can be obtained according to the actual hardware resources.
  • the combination of the uplink signals sent by the radio remote unit in the sector split mode is flexibly implemented. And, by combining the uplink signals sent by the radio remote unit The bandwidth of the combined signal is adjusted according to the bandwidth limit of the upper node, so that resource loss and signal loss can be effectively reduced.
  • the embodiments of the present invention can achieve the beneficial technical effects of combining the uplink signals of the RRUs in the sector split mode and then sending them to the BBU for processing.
  • FIG. 1 is a schematic diagram of a coverage manner of a sector split in the prior art
  • FIG. 2 is a schematic diagram of a preferred embodiment 1 of a base station system according to the present invention.
  • FIG. 3 is a schematic diagram of a second preferred embodiment of a base station system according to the present invention.
  • FIG. 4 is a schematic diagram of a third preferred embodiment of a base station system according to the present invention.
  • FIG. 5 is a schematic diagram of a preferred embodiment 4 of a base station system according to the present invention.
  • FIG. 6 is a schematic diagram of a preferred embodiment 5 of a base station system according to the present invention. detailed description
  • the concept of the embodiment of the present invention is to flexibly select different combining methods according to actual hardware resources in the coverage mode of the sector splitting, and provide corresponding combining units to realize remote radio frequency in the sector split mode.
  • the combined processing of the uplink signals sent by the unit enables the BBU to support a large number of RRUs, and the bandwidth consumption and signal loss at the time of combining can be effectively reduced by bandwidth adjustment.
  • the embodiment of the present invention provides a method for combining uplink signals in a sector splitting manner, including: combining the uplink signals sent by the remote radio unit, and adjusting according to the bandwidth limitation of the upper node. After the bandwidth of the combined signal, the processed uplink signal is sent to the baseband processing unit, and the baseband processing unit processes the uplink signal.
  • the uplink signal sent by the radio remote unit is combined and sent to the baseband processing unit for processing, and the radio frequency is
  • the uplink signal sent by the remote unit is combined, it is determined whether the bandwidth of the combined signal meets the bandwidth required by the preset signal-to-noise ratio of the superior node, and if not, the bandwidth is not adjusted.
  • the entire bandwidth, if not met, is adjusted by the digital gain correction method to the bandwidth required for the combined signal to meet the bandwidth required by the predetermined superior node signal-to-noise ratio.
  • the preferred embodiment 1 provides a method for adjusting the bandwidth while combining the uplink signals, thereby effectively reducing resource loss and signal loss.
  • the radio remote unit receives a signal using a single-polarized antenna, and receives the received lower level in the radio remote unit.
  • the uplink signal sent by the node is combined with the uplink signal sent by the user equipment, and the bandwidth of the combined signal is adjusted according to the bandwidth limitation of the upper node, and then the processed uplink signal is sent to the baseband processing unit for processing.
  • combining the received uplink signal sent by the lower node with the uplink signal sent by the user equipment may specifically include: the radio remote unit determines whether the uplink signal sent by the lower node is the radio remote The uplink signal of the cell configured by the unit is combined with the uplink signal sent by the user equipment, otherwise the uplink signal is directly transparently transmitted.
  • the radio frequency signal switching unit is disposed between the radio remote unit and the baseband processing unit, and the ports of the radio frequency signal switching unit are The received uplink signal sent by the remote radio unit is combined, and the bandwidth of the combined signal is adjusted according to the bandwidth limitation of the upper node, and then the processed uplink signal is sent to the baseband processing unit for processing.
  • the board provided by the baseband processing unit is configured to send the uplink of the radio remote unit received by each port of the board.
  • the signal is combined, and the bandwidth of the combined signal is adjusted according to the bandwidth limit of the upper node, and then the processed uplink signal is sent to the baseband processing unit for processing.
  • the board provided with the baseband processing unit combines the uplink signals sent by the radio receiving units to the two signals according to a preset combining method.
  • the preset combining method may be: the board provided with the baseband processing unit uses an uplink signal received by a pre-selected port of the board as a first path signal, The uplink signal received by another pre-selected port of the board is used as the second path signal, and the board is The uplink signal received by other ports is combined with the first channel signal.
  • the pre-set merging method may also be: combining the uplink signals received by the plurality of pre-selected ports of the board into the first path signal, and receiving the other ports of the board.
  • the uplink signal is combined into a second signal.
  • the number of the pre-selected ports that receive the uplink signal is smaller than the total number of ports of the board.
  • the preferred embodiment 5 of the method for combining the uplink signals in the sector splitting mode provided by the present invention is configured to combine the uplink signals sent by the radio remote unit with the boards of the baseband processing unit, and according to After the bandwidth limit of the upper node adjusts the bandwidth of the combined signal, the processed uplink signal is sent to the baseband processing unit for processing.
  • the board provided with the baseband processing unit receives two uplink signals transmitted by another single board through a combined circuit, and is referred to herein as a third uplink signal and a fourth uplink signal. And combining the two uplink signals with the two uplink signals obtained by the single board after the combined processing, that is, the third road signal and the board are processed by one combined processing.
  • the first signal is combined, and the fourth signal is combined with the second signal obtained by the single board after a combined processing; wherein the primary combining processing is an uplink signal sent by the remote radio unit
  • the combined road is a two-way signal.
  • the combining methods of the above preferred embodiments 2 to 5 can also be combined in two or two, or at the same time, the three combining methods can be used to support a larger number of RRUs to adapt to different environmental requirements.
  • the combining method of the above-mentioned preferred embodiments 2 to 5 can further determine whether the bandwidth of the combined signal conforms to the preset superior node when the bandwidth of the combined signal is adjusted according to the bandwidth limitation of the upper node. The bandwidth required under the SNR condition, if it is met, the bandwidth is not adjusted. If it is not met, the bandwidth of the combined signal is adjusted to the SNR condition of the preset superior node by the digital gain correction method. The required bandwidth. Thereby effectively reducing resource loss and signal loss Lost.
  • the present invention further provides a corresponding base station system, including a single board provided with a baseband processing unit and a radio remote unit connected to the single board, and includes A combining unit that combines the uplink signals sent by the radio remote unit.
  • the bandwidth adjustment unit for transmitting the bandwidth of the integrated signal to the radio remote unit.
  • a base station system includes a radio remote unit 1, a radio remote unit 1 and a single board 4 provided with a baseband processing unit 3, and the radio remote unit 2 serves as a lower node of the radio remote unit 1 and a radio remote unit 1
  • the RF remote unit 1 is provided with a combining unit 5 for combining the uplink signals transmitted by the remote radio unit.
  • the combining unit 5 for combining the uplink signals sent by the radio remote unit 2 combines the uplink signal with the radio remote unit 1
  • the uplink signals sent by the user equipment are combined and then sent to the baseband processing unit 3 via the board 4.
  • the combining unit 5 for combining the uplink signals sent by the radio remote unit 2 may also first determine whether the uplink signal is The uplink signal of the cell configured by the radio remote unit 1 is combined with the uplink signal sent by the user equipment received by the radio remote unit 1 and then sent to the baseband processing unit 3 via the board 4. Otherwise, the uplink signal is directly transmitted.
  • the combining unit 5 for combining the uplink signals sent by the remote radio unit may be further provided for the upper node (the single board 4 provided with the baseband processing unit 3 in this embodiment).
  • the bandwidth limit unit for adjusting the bandwidth of the combined signal the unit determines whether the bandwidth of the combined signal meets the bandwidth required by the preset signal-to-noise ratio of the upper node, and if not, does not adjust the bandwidth, if not The matching is performed by the digital gain correction method, and the bandwidth of the combined signal is adjusted to the bandwidth required under the condition of the predetermined superior node signal-to-noise ratio.
  • the base station system includes a radio remote unit 31, a radio remote unit 32, a radio frequency signal exchange unit 33, and a single board 35 provided with a baseband processing unit 34.
  • the radio frequency signal exchange unit 33 is provided with an uplink for transmitting the radio remote unit.
  • the signal combines the combining unit 36.
  • the combining unit 36 combines the uplink signals and transmits the signals to the baseband processing unit 34 via the board 35.
  • the combining unit 36 may be provided with a bandwidth adjusting unit for adjusting the bandwidth of the combined signal according to the bandwidth limitation of the upper node (the single board 4 provided with the baseband processing unit 3 in this embodiment).
  • a base station system includes a radio remote unit 410, a radio remote unit 411, a radio remote unit 412, and a radio remote unit 413.
  • the radio frequency signal exchange unit 420, the radio frequency signal exchange unit 421, and the single board 44 provided with the baseband processing unit 43.
  • the radio frequency signal exchange unit 420 is provided with a combining unit for combining the uplink signals sent by the radio remote unit. 45.
  • the RF signal exchange unit 421 is provided with a combining unit 46, and the unit 44 is provided with a combining unit 47.
  • the combining unit 45 combines the uplink signals and transmits the signals to the board 44.
  • the combining unit 46 combines the uplink signals and transmits the signals to the board 44.
  • the board 44 receives the uplink signal transmitted by the RF signal switching unit 420 and the RF signal switching unit 421, the combining unit 47 combines the uplink signals and transmits the signals to the baseband processing unit 43.
  • the combining unit 47 of the board 44 can use a preset combining method.
  • the uplink signals received by the ports of the board 44 are combined into two signals.
  • the preset combining method may be: an uplink signal received by a preselected port of the board 44 as an A channel signal, and an uplink signal received by another preselected port of the board 44.
  • the B channel signal the uplink signal received by the other ports of the board is combined with the A channel signal or the B channel signal.
  • FIG. 5 is a schematic diagram of a preferred embodiment 4 of a base station system according to the present invention.
  • the figure shows between a single board 52 provided with a baseband processing unit 51 and a single board 54 provided with a baseband processing unit 53. The way the uplink signal is combined.
  • the board 52 is provided with a port 520, a port 521, and a port 522.
  • the board 54 is provided with a port 540, a port 541, and a port 542.
  • the board 52 is also connected to the port 543 of the board 54 through the port 523.
  • the single plate 52 is provided with a primary joining unit 550 and a secondary combining unit 560, and the single plate 54 is provided with a primary joining unit 551 and a secondary combining unit 561.
  • the primary combining unit 550 is configured to combine the uplink signals received by the port 520, the port 521, and the port 522 of the single board 52, and the primary combining unit 551 is configured to receive the port 540, the port 541, and the port 542 of the board 54.
  • the incoming uplink signals are combined.
  • the secondary combining unit 560 is configured to combine the signal output by the primary combining unit 550 of the single board 52 and the signal output by the primary combining unit 551 of the single board 54 received by the port 523 into two signals, for example, once.
  • the A-channel signal outputted by the combining unit 550 is combined with the A-channel signal outputted by the primary combining unit 551 received by the port 523, and the B-channel signal outputted by the primary combining unit 550 and the primary combining unit 551 received by the port 523 are output.
  • the B-way signals are combined and then transmitted to the baseband processing unit 51 for processing.
  • the secondary combining unit 561 is configured to combine the signal output by the primary combining unit 551 of the single board 54 and the signal output by the primary combining unit 550 of the single board 52 received by the port 543 into two signals, and then It is transmitted to the baseband processing unit 53 for processing.
  • FIG. 6 is a schematic diagram of a preferred embodiment 5 of a base station system according to the present invention.
  • a base station system includes a radio remote unit 610, a radio remote unit 611, and a radio remote unit 610 and a radio remote unit 611.
  • the remote unit 618, the single-board 630 provided with the baseband processing unit 640, and the radio remote unit 618 and the radio frequency signal exchange unit 621 are connected to the radio frequency signal exchange unit 622, the radio remote unit 616, and the radio
  • the board 631 of the baseband processing unit 641 has a port 650 of the board 630 and a port 651 of the board 631 connected by a cable.
  • the radio frequency signal exchange unit 620 is provided with a combining unit (not shown) for combining the uplink signals sent by the radio remote unit 610 and the radio remote unit 611; Road unit (not shown) for RF signal
  • the uplink signal sent by the number exchanging unit 620, the radio remote unit 612, and the radio remote unit 613 is combined;
  • the radio remote unit 615 is provided with a combining unit (not shown) for the radio remote unit
  • the uplink signal sent by the 614 is combined with the uplink signal sent by the user equipment;
  • the RF signal exchange unit 615 is provided with a combining unit (not shown) for combining the uplink signals sent by the radio remote unit 615.
  • the single board 630 is provided with a primary combining unit 660 for combining the uplink signals transmitted by the radio frequency signal exchange unit 622, the radio remote unit 616, and the radio remote unit 617;
  • the unit 661 is configured to combine the uplink signals transmitted by the radio remote unit 618 and the radio frequency signal exchange unit 621.
  • the single board 630 is further provided with a secondary combining unit 670 for outputting signals to the primary combining unit 660.
  • the signal of the board 631 received by the port 650 is combined, for example, the signal of the A channel transmitted by the board 631 is combined with the signal of the A channel obtained by the single board 630, and the board B is transmitted by the board 631.
  • the B-channel signal obtained by the single-plate 630 is combined with the B-channel signal; similarly, the single-plate 631 is also provided with a secondary combining unit 671 for outputting the signal outputted by the primary combining unit 661 and receiving the port 651.
  • the signals of the single board 630 are combined.
  • a bandwidth adjustment unit may be disposed in the radio remote unit and/or the combination unit disposed in the radio frequency signal exchange unit, and configured to be used according to the upper level.
  • the bandwidth limit of the node adjusts the bandwidth of the combined signal, thereby effectively reducing resource loss and signal loss.

Description

技术领域
本发明涉及无线通信领域中的基站组网技术， 特别涉及扇区分裂方式下 的上行信号合路的方法及基站系统。 背景技术
随着第三代移动通信技术的发展， 基站的设计方法趋向于基带处理单元
(Base Band Uni t , 简称 BBU )与射频分离， 即为射频拉远技术。 射频拉远单 元（Remote Radio Uni t , 简称 RRU) 为基于射频拉远技术的典型应用， RRU 可以很好地解决机房选址困难以及馈缆损耗等问题， 提高天线口的发射功率。 射频拉远技术使基站的射频部分和无线信号处理部分可以分离开， 也就是射 频拉远单元 RRU可以安装在远离 BBU的地方， 这为运营商进行网络的建设提 供了前所未有的灵活性， 这也将位于基站系统最后环节的发射器功耗降低了 近 50%, 传输线路成本和安装成本也降低了 30%至 70%。
在特定地域进行覆盖（如室内覆盖）时， 常釆用多个 RRU进行不同区域的 覆盖， 如图 1所示， 各 RRU的覆盖区域属于同一个小区， 这种覆盖方式称为 扇区分裂。 其中， RRU与 BBU之间的接口釆用数字信号 （IQ信号） 以保证信 噪比。
扇区分裂的覆盖方式主要应用于室内覆盖， 而室内无线环境相对稳定， 因 此通常不釆用天线接收分集方式， 即每个 RRU只需要一根单极化天线， 因此每 个 RRU的每个频点只需要一路由天线和载波对所唯一确定的上行 IQ信号 （即 A*C信号）。 对于 WCDMA系统， 一般情况下都是两天线分集接收的， 即基带处理 部分至少可处理两路上行 IQ信号， 其中每路上行 IQ信号中每个小区的信号带 宽总是 Bmin。
现有技术的不足之处在于：
1、 现有技术中未对 RRU发送的上行信号进行合路， 因此不能支持大量的 RRU。 由图 1可见， 当 RRU的数量很大时， 需要将扇区分裂方式下的上行信号 进行合路以后， 再发送给 BBU进行处理。
2、 进行上行信号合路的过程是一个两路数字信号加和的过程， 不可避免 地存在资源消耗和信噪比降低的问题。 因此需要有可行的上行信号合路的方 法来减少合路的信号损失。 发明内容
本发明的目的之一是针对上述现有技术的不足，提供一种扇区分裂方式下 的上行信号合路的方法， 能够在扇区分裂方式下对 RRU 的上行信号进行合路 后再发给 BBU进行处理， 并且能够有效地减少资源损耗和信号损失。
本发明的目的之二是针对上述现有技术的不足，提供相应的基站系统， 实 现对射频拉远单元 RRU产生的上行信号进行合路处理， 并且能够有效地减少 资源损耗和信号损失。
为实现上述目的，本发明实施例提供了一种扇区分裂方式下的上行信号合 路的方法， 包括： 对射频拉远单元发送的上行信号进行合路处理， 并根据上 级节点的带宽限制调整合路后的信号的带宽后， 将处理后的上行信号发送到 基带处理单元， 所述基带处理单元对所述上行信号进行处理。
上述技术方案中， 所述根据上级节点的带宽限制调整合路后的信号的带 宽可包括： 判断合路后的信号的带宽是否符合预设的上级节点的信噪比条件 下所需的带宽， 如果符合则不调整带宽， 如果不符合则通过数字增益校正方 法， 将合路后的信号的带宽调整至符合所述预设的上级节点的信噪比条件下 所需的带宽。
优选地，所述对射频拉远单元发送的上行信号进行合路可包括： 射频拉远 单元将所接收到的下级节点发送的上行信号与用户设备发送的上行信号进行 合路。 所述对射频拉远单元发送的上行信号进行合路也可包括： 设在射频拉 远单元与基带处理单元之间的射频信号交换单元， 对该射频信号交换单元的 各端口接收到的射频拉远单元发送的上行信号进行合路。 所述对射频拉远单 元发送的上行信号进行合路还可包括： 设在射频拉远单元与基带处理单元之 间的射频信号交换单元， 对该射频信号交换单元的各端口接收到的射频拉远 单元发送的上行信号进行合路。 所述对射频拉远单元发送的上行信号进行合 路还可包括： 设有所述基带处理单元的单板对该单板的各端口接收到的射频 拉远单元发送的上行信号进行合路。 所述对射频拉远单元发送的上行信号进 行合路还可包括： 设有所述基带处理单元的单板之间对射频拉远单元发送的 上行信号进行合路。
为实现发明目的，本发明实施例还提供了一种基站系统， 包括设有基带处 理单元的单板以及与所述单板无线连接的射频拉远单元， 还包括用于对射频 拉远单元发送的上行信号进行合路的合路单元； 所述合路单元中还设有用于 根据上级节点的带宽限制调整合路后的信号的带宽的带宽调整单元。
上述技术方案中，所述用于对射频拉远单元发送的上行信号进行合路的合 路单元还可设有用于根据上级节点的带宽限制调整合路后的信号的带宽的带 宽调整单元。 所述用于对射频拉远单元发送的上行信号进行合路的合路单元 可设于所述射频拉远单元中。 所述基站系统还可包括射频信号交换单元， 与 所述单板和所述射频拉远单元连接， 所述用于对射频拉远单元发送的上行信 号进行合路的合路单元设于所述射频信号交换单元中。 所述用于对射频拉远 单元发送的上行信号进行合路的合路单元还可设于所述单板中， 与所述单板 的各端口以及所述基带处理单元连接。 所述合路单元可括用于将所述单板的 各端口接收到的上行信号合路为两路信号的一次合路单元。 所述合路单元还 可包括二次合路单元， 与所述一次合路单元和基带处理单元连接， 所述二次 合路单元用于将其它单板传送的经过一次合路处理后的上行信号与经过一次 合路处理后的本单板其它端口接收到的上行信号合路为两路信号。
在上述技术方案中，通过在射频拉远单元中或射频信号交换单元中或设有 基带处理单元的单板中， 对射频拉远单元发送的上行信号进行合路， 从而能 够根据实际硬件资源情况， 灵活地实现扇区分裂方式下对射频拉远单元发送 的上行信号的合路。 并且， 通过在对射频拉远单元发送的上行信号进行合路 时根据上级节点的带宽限制调整合路后的信号的带宽， 从而能够有效地减少 资源损耗和信号损失。
综上所述， 本发明实施例能够达到在扇区分裂方式下对 RRU 的上行信号 进行合路后再发给 BBU进行处理的有益技术效果。 附图说明
图 1为现有技术中扇区分裂的覆盖方式示意图；
图 2为本发明所提供的基站系统的优选实施例一的示意图；
图 3为本发明所提供的基站系统的优选实施例二的示意图；
图 4为本发明所提供的基站系统的优选实施例三的示意图；
图 5为本发明所提供的基站系统的优选实施例四的示意图；
图 6为本发明所提供的基站系统的优选实施例五的示意图。 具体实施方式
下面结合附图和实施例， 对本发明的技术方案做进一步的详细描述。 本发明实施例的构思是在扇区分裂的覆盖方式下根据实际的硬件资源情 况灵活地选择不同的合路方法， 并提供相应的合路单元， 以实现在扇区分裂 方式下对射频拉远单元发送的上行信号的合路处理， 从而使 BBU 能够支持大 量的 RRU , 并且通过带宽调整能够有效地减少合路时的资源消耗和信号损失。
基于上述发明构思，本发明实施例提供了一种扇区分裂方式下的上行信号 合路的方法， 包括： 对射频拉远单元发送的上行信号进行合路处理， 并根据 上级节点的带宽限制调整合路后的信号的带宽后， 将处理后的上行信号发送 到基带处理单元， 所述基带处理单元对所述上行信号进行处理。
本发明提供的扇区分裂方式下的上行信号合路的方法的优选实施例一中， 对射频拉远单元发送的上行信号进行合路后发送到基带处理单元进行处理， 并在所述对射频拉远单元发送的上行信号进行合路时， 判断合路后的信号的 带宽是否符合预设的上级节点的信噪比条件下所需的带宽， 如果符合则不调 整带宽， 如果不符合则通过数字增益校正方法， 将合路后的信号的带宽调整 至符合所述预设的上级节点的信噪比条件下所需的带宽。 本优选实施例一提 供了在对上行信号进行合路的同时对带宽进行调整， 从而有效地减少资源损 耗和信号损失的方法。
本发明提供的扇区分裂方式下的上行信号合路的方法的优选实施例二中， 射频拉远单元使用一根单极化天线接收信号， 并在射频拉远单元中将所接收 到的下级节点发送的上行信号与用户设备发送的上行信号进行合路， 并根据 上级节点的带宽限制调整合路后的信号的带宽后， 将处理后的上行信号发送 到基带处理单元进行处理。 所述在射频拉远单元中， 将接收到的下级节点发 送的上行信号与用户设备发送的上行信号进行合路可具体包括： 射频拉远单 元判断下级节点发送的上行信号是否为该射频拉远单元所配置的小区的上行 信号， 是则将该上行信号与用户设备发送的上行信号进行合路， 否则直接透 传该上行信号。
本发明提供的扇区分裂方式下的上行信号合路的方法的优选实施例三中， 设在射频拉远单元与基带处理单元之间的射频信号交换单元， 对该射频信号 交换单元的各端口接收到的射频拉远单元发送的上行信号进行合路， 并根据 上级节点的带宽限制调整合路后的信号的带宽后， 将处理后的上行信号发送 到基带处理单元进行处理。
本发明提供的扇区分裂方式下的上行信号合路的方法的优选实施例四中， 设有所述基带处理单元的单板对该单板的各端口接收到的射频拉远单元发送 的上行信号进行合路， 并根据上级节点的带宽限制调整合路后的信号的带宽 后， 将处理后的上行信号发送到基带处理单元进行处理。
具体可包括：设有所述基带处理单元的单板按照预先设定的合路方法，将 各端口接收到射频拉远单元发送的上行信号合路为两路信号。
所述预先设定的合路方法可为：所述设有所述基带处理单元的单板将所述 单板的一个预先选定的端口接收到的上行信号作为第一路信号， 将所述单板 的另一个预先选定的端口接收到的上行信号作为第二路信号， 将所述单板的 其它端口接收到的上行信号与第一路信号合路。
所述预先设定的合路方法也可为：将所述单板的数个预先选定的端口接收 到的上行信号合路为第一路信号， 将所述单板的其它端口接收到的上行信号 合路为第二路信号。 当然， 接收所述上行信号的所述预先选定的端口的个数 小于单板总的端口个数。
本发明提供的扇区分裂方式下的上行信号合路的方法的优选实施例五中， 设有所述基带处理单元的单板之间对射频拉远单元发送的上行信号进行合 路， 并根据上级节点的带宽限制调整合路后的信号的带宽后， 将处理后的上 行信号发送到基带处理单元进行处理。
具体可包括：所述设有所述基带处理单元的单板通过电缆接收其它单板传 送的经过一次合路处理后的两路上行信号， 这里称为第三路上行信号和第四 路上行信号； 并将这两路上行信号分别与本单板经过一次合路处理后得到的 两路上行信号进行合路， 即： 将所述第三路信号与本单板经过一次合路处理 后得到的第一路信号合路， 将所述第四路信号与本单板经过一次合路处理后 得到的第二路信号合路； 其中所述一次合路处理为将射频拉远单元发送的上 行信号合路为两路信号。
上述优选实施例二至五中，提供了对上行信号进行合路的不同方法，通过 在射频拉远单元中或射频信号交换单元中或设有基带处理单元的单板中对上 行信号进行合路， 从而提供了不同硬件复杂度的合路方法， 能够适应不同的 环境需求。
进一步地，上述优选实施例二至五的合路方法还可以两两组合，或者同时 釆用这三种合路方法， 从而能够支持更多数量的 RRU, 适应不同的环境需求。
更进一步地，上述优选实施例二至五的合路方法还可以在根据上级节点的 带宽限制调整合路后的信号的带宽时， 判断合路后的信号的带宽是否符合预 设的上级节点的信噪比条件下所需的带宽， 如果符合则不调整带宽， 如果不 符合则通过数字增益校正方法， 将合路后的信号的带宽调整至符合所述预设 的上级节点的信噪比条件下所需的带宽。 从而有效地减少资源损耗和信号损 失。
基于上述扇区分裂下的上行信号合路的方法，本发明还提供了相应的基站 系统， 包括设有基带处理单元的单板以及与所述单板无线连接的射频拉远单 元， 还包括用于对射频拉远单元发送的上行信号进行合路的合路单元。
进一步地， 为减少资源消耗和信号损失，在所述用于对射频拉远单元发送 整合路后的信号的带宽的带宽调整单元。
参见图 2 , 为本发明所提供的基站系统的优选实施例一的示意图。 一种基 站系统， 包括射频拉远单元 1、射频拉远单元 1和设有基带处理单元 3的单板 4 , 射频拉远单元 2作为射频拉远单元 1的下级节点与射频拉远单元 1无线连 接， 在射频拉远单元 1 中设有用于对射频拉远单元发送的上行信号进行合路 的合路单元 5。 当射频拉远单元 1收到射频拉远单元 2发送的上行信号后， 用 于对射频拉远单元 2发送的上行信号进行合路的合路单元 5将该上行信号与 射频拉远单元 1 收到的用户设备发送的上行信号进行合路， 然后经由单板 4 发送给基带处理单元 3。
进一步地， 当射频拉远单元 1收到射频拉远单元 2发送的上行信号后，用 于对射频拉远单元 2发送的上行信号进行合路的合路单元 5也可先判断该上 行信号是否为射频拉远单元 1 所配置的小区的上行信号， 是则将该上行信号 与射频拉远单元 1收到的用户设备发送的上行信号进行合路，然后经由单板 4 发送给基带处理单元 3; 否则直接透传该上行信号。
更进一步地，用于对射频拉远单元发送的上行信号进行合路的合路单元 5 中还可设有用于根据上级节点 （本实施例中为设有基带处理单元 3的单板 4 ) 的带宽限制调整合路后的信号的带宽的单元， 该单元判断合路后的信号的带 宽是否符合预设的上级节点的信噪比条件下所需的带宽， 如果符合则不调整 带宽， 如果不符合则通过数字增益校正方法， 将合路后的信号的带宽调整至 符合所述预设的上级节点的信噪比条件下所需的带宽。
参见图 3所示的本发明所提供的基站系统的优选实施例二的示意图，一种 基站系统， 包括射频拉远单元 31、 射频拉远单元 32、 射频信号交换单元 33 以及设有基带处理单元 34的单板 35 , 射频信号交换单元 33中设有用于对射 频拉远单元发送的上行信号进行合路的合路单元 36。 当射频信号交换单元 33 收到射频拉远单元 31和射频拉远单元 32发送上行信号后， 由合路单元 36对 上行信号进行合路以后经由单板 35传送给基带处理单元 34。 进一步地，合路 单元 36中也可设有带宽调整单元， 用于根据上级节点（本实施例中为设有基 带处理单元 3的单板 4 ) 的带宽限制调整合路后的信号的带宽。
参见图 4所示的本发明所提供的基站系统的优选实施例三的示意图，一种 基站系统， 包括射频拉远单元 410、 射频拉远单元 411、 射频拉远单元 412、 射频拉远单元 413、 射频信号交换单元 420、 射频信号交换单元 421、 以及设 有基带处理单元 43的单板 44 ,射频信号交换单元 420中设有用于对射频拉远 单元发送的上行信号进行合路的合路单元 45 , 射频信号交换单元 421中设有 合路单元 46 , 单板 44中设有合路单元 47。 当射频信号交换单元 420收到射 频拉远单元 410和射频拉远单元 411发送的上行信号后， 由合路单元 45对上 行信号进行合路后传送给单板 44。 当射频信号交换单元 421收到射频拉远单 元 412和射频拉远单元 413发送的上行信号后， 由合路单元 46对上行信号进 行合路后传送给单板 44。当单板 44收到射频信号交换单元 420和射频信号交 换单元 421传送的上行信号后， 由合路单元 47对上行信号进行合路后传送给 基带处理单元 43。
进一步地， 当单板 44有 3个或 3个以上的端口接收射频信号交换单元或 射频拉远单元发送的上行信号时， 单板 44的合路单元 47可以釆用预先设定 的合路方法对单板 44各端口接收到的上行信号合路为两路信号。 例如， 预先 设定的合路方法可为： 将单板 44的一个预先选定的端口接收到的上行信号作 为 A路信号， 将单板 44的另一个预先选定的端口接收到的上行信号作为 B路 信号， 将所述单板的其它端口接收到的上行信号与 A路信号或 B路信号合路。
图 5为本发明所提供的基站系统的优选实施例四的示意图，图中示出了在 设有基带处理单元 51的单板 52和设有基带处理单元 53的单板 54之间进行 上行信号合路的方式。 单板 52设有端口 520、 端口 521以及端口 522 , 单板 54设有端口 540、 端口 541、 以及端口 542 , 单板 52还通过端口 523与单板 54的端口 543连接。 单板 52设有一次合路单元 550和二次合路单元 560 , 单 板 54设有一次合路单元 551和二次合路单元 561。 一次合路单元 550用于对 单板 52的端口 520、 端口 521和端口 522接收到的上行信号进行合路， 一次 合路单元 551用于对单板 54的端口 540、 端口 541和端口 542接收到的上行 信号进行合路。 二次合路单元 560用于将单板 52的一次合路单元 550输出的 信号和端口 523接收到的单板 54的一次合路单元 551输出的信号合路为两路 信号， 例如可将一次合路单元 550输出的 A路信号与端口 523接收的一次合 路单元 551输出的 A路信号合路， 并将一次合路单元 550输出的 B路信号与 端口 523接收的一次合路单元 551输出的 B路信号合路， 然后传送给基带处 理单元 51处理。 同样地， 二次合路单元 561用于将单板 54的一次合路单元 551输出的信号以及端口 543接收到的单板 52的一次合路单元 550输出的信 号合路为两路信号， 然后传送给基带处理单元 53处理。
图 6 为本发明所提供的基站系统的优选实施例五的示意图， 一种基站系 统， 包括射频拉远单元 610、 射频拉远单元 611、 与射频拉远单元 610和射频 拉远单元 611连接的射频信号交换单元 620、 射频拉远单元 612、 射频拉远单 元 613、 与射频信号交换单元 620、 射频拉远单元 612、 射频拉远单元 613连 接的射频信号交换单元 621、 射频拉远单元 614、 与射频拉远单元 614连接的 射频拉远单元 615、 与射频拉远单元 615连接的射频信号交换单元 622、 射频 拉远单元 616、 射频拉远单元 617、 与射频拉远单元 617连接的射频拉远单元 618、 与射频信号交换单元 622、 射频拉远单元 616、 射频拉远单元 617连接 的设有基带处理单元 640的单板 630、与射频拉远单元 618和射频信号交换单 元 621连接的设有基带处理单元 641的单板 631 ,单板 630的端口 650与单板 631的端口 651通过电缆连接。射频信号交换单元 620中设有合路单元（图中 未示出 ), 用于对射频拉远单元 610和射频拉远单元 611发送的上行信号进行 合路； 射频信号交换单元 621中设有合路单元（图中未示出）， 用于对射频信 号交换单元 620、 射频拉远单元 612、 射频拉远单元 613发送的上行信号进行 合路； 射频拉远单元 615中设有合路单元（图中未示出 ), 用于对射频拉远单 元 614发送的上行信号和用户设备发送的上行信号进行合路； 射频信号交换 单元 615中设有合路单元（图中未示出）， 用于对射频拉远单元 615发送的上 行信号进行合路； 单板 630中设有一次合路单元 660 , 用于对射频信号交换单 元 622、 射频拉远单元 616、 射频拉远单元 617传送的上行信号进行合路； 单 板 631中设有一次合路单元 661 ,用于对射频拉远单元 618和射频信号交换单 元 621传送的上行信号进行合路； 单板 630中还设有二次合路单元 670 , 用于 对一次合路单元 660输出的信号以及端口 650接收的单板 631的信号进行合 路，例如将单板 631传送的 A路信号与单板 630经过一次合路处理后得到的 A 路信号合路， 并将单板 631传送的 B路信号与单板 630经过一次合路处理后 得到的 B路信号合路； 同样地， 单板 631中也设有二次合路单元 671 , 用于对 一次合路单元 661输出的信号以及端口 651接收的单板 630的信号进行合路。
上述本发明所提供的基站系统的优选实施例三至五中，设于射频拉远单元 和 /或设于射频信号交换单元中的合路单元中均可设有带宽调整单元， 用于根 据上级节点的带宽限制调整合路后的信号的带宽， 从而有效地减少资源损耗 和信号损失。
此外，本领域的技术人员可以根据实际硬件资源情况，灵活釆用本发明所 提供的合路单元设置方式及其组合方式， 其仍然在本发明技术方案所要求保 护的范围之内。
最后所应说明的是： 以上实施例仅用以说明本发明的技术方案，而非对本 发明作限制性理解。 尽管参照上述较佳实施例对本发明进行了详细说明， 本 领域的普通技术人员应当理解： 其依然可以对本发明的技术方案进行修改或 者等同替换， 而这种修改或者等同替换并不脱离本发明技术方案的精神和范 围。

Claims

权 利 要 求
1、 一种扇区分裂方式下的上行信号合路的方法， 其特征在于， 包括： 对射频拉远单元发送的上行信号进行合路处理，并根据上级节点的带宽限 制调整合路后的信号的带宽后， 将处理后的上行信号发送到基带处理单元， 所述基带处理单元对所述上行信号进行处理。
2、 根据权利要求 1所述的方法， 其特征在于， 所述根据上级节点的带宽 限制调整合路后的信号的带宽包括： 判断合路后的信号的带宽是否符合预设 的上级节点的信噪比条件下所需的带宽， 如果符合则不调整带宽， 如果不符 合则将合路后的信号的带宽调整至符合所述预设的上级节点的信噪比条件下 所需的带宽。
3、 根据权利要求 1所述的方法， 其特征在于， 所述对射频拉远单元发送 的上行信号进行合路包括： 射频拉远单元将所接收到的下级节点发送的上行 信号与用户设备发送的上行信号进行合路。
4、 根据权利要求 3所述的方法， 其特征在于， 所述对射频拉远单元发送 的上行信号进行合路还包括： 设在射频拉远单元与基带处理单元之间的射频 信号交换单元， 对该射频信号交换单元的各端口接收到的射频拉远单元发送 的上行信号进行合路。
5、 根据权利要求 1所述的方法， 其特征在于， 所述对射频拉远单元发送 的上行信号进行合路包括： 设在射频拉远单元与基带处理单元之间的射频信 号交换单元， 对该射频信号交换单元的各端口接收到的射频拉远单元发送的 上行信号进行合路。
6、根据权利要求 1 - 5任一所述的方法， 其特征在于， 所述对射频拉远单 元发送的上行信号进行合路包括： 设有所述基带处理单元的单板， 对该单板 的各端口接收到的射频拉远单元发送的上行信号进行合路。
7、 根据权利要求 6所述的方法， 其特征在于， 所述对射频拉远单元发送 的上行信号进行合路还包括： 设有所述基带处理单元的单板之间对射频拉远 单元发送的上行信号进行合路。
8、 根据权利要求 3所述的方法， 其特征在于， 在所述射频拉远单元将接 收到的下级节点发送的上行信号与用户设备发送的上行信号进行合路前， 还 执行以下操作： 射频拉远单元判断下级节点发送的上行信号是否为该射频拉 远单元所配置的小区的上行信号， 是则将该上行信号与用户设备发送的上行 信号进行合路， 否则直接透传该上行信号。
9、 根据权利要求 6所述的方法， 其特征在于， 所述设有所述基带处理单 元的单板对该单板的各端口接收到的射频拉远单元发送的上行信号进行合路 包括： 所述设有所述基带处理单元的单板按照预先设定的合路方法， 将各端 口接收到射频拉远单元发送的上行信号合路为两路信号。
10、根据权利要求 9所述的方法， 其特征在于， 所述预先设定的合路方法 为： 所述设有所述基带处理单元的单板将所述单板的一个预先选定的端口接 收到的上行信号作为第一路信号， 将所述单板的另一个预先选定的端口接收 到的上行信号作为第二路信号， 将所述单板的其它端口接收到的上行信号与 第一路信号合路。
11、根据权利要求 9所述的方法， 其特征在于， 所述预先设定的合路方法 为： 将所述单板的数个预先选定的端口接收到的上行信号合路为第一路信号 , 将所述单板的其它端口接收到的上行信号合路为第二路信号。
12、根据权利要求 7所述的方法， 其特征在于， 所述设有所述基带处理单 元的单板之间对射频拉远单元发送的上行信号进行合路包括： 所述设有所述 基带处理单元的单板通过电缆接收其它单板传送的经过一次合路处理后的第 三路上行信号和第四路上行信号， 并将所述第三路信号与本单板经过一次合 路处理后得到的第一路信号合路， 将所述第四路信号与本单板经过一次合路 处理后得到的第二路信号合路； 其中所述一次合路处理为将射频拉远单元发 送的上行信号合路为两路信号。
1 3、一种基站系统， 包括设有基带处理单元的单板以及与所述单板无线连 接的射频拉远单元， 其特征在于， 还包括用于对射频拉远单元发送的上行信 号进行合路的合路单元； 所述用于对射频拉远单元发送的上行信号进行合路 的合路单元中还设有用于根据上级节点的带宽限制调整合路后的信号的带宽 的带宽调整单元。
14、 根据权利要求 1 3所述的基站系统， 其特征在于， 所述合路单元设于 所述射频拉远单元中。
15、 根据权利要求 1 3所述的基站系统， 其特征在于， 所述基站系统还包 括射频信号交换单元， 与所述单板和所述射频拉远单元连接， 所述合路单元 设于所述射频信号交换单元中。
16、 根据权利要求 14所述的基站系统， 其特征在于， 所述基站系统还包 括射频信号交换单元， 与所述单板和所述射频拉远单元连接， 所述合路单元 设于所述射频信号交换单元中。
17、 根据权利要求 1 3 - 16任一所述的基站系统， 其特征在于， 所述合路 单元设于所述单板中， 与所述单板的各端口以及所述基带处理单元连接。
18、 根据权利要求 17所述的基站系统， 其特征在于， 所述合路单元包括 用于将所述单板的各端口接收到的上行信号合路为两路信号的一次合路单 元。
19、 根据权利要求 18所述的基站系统， 其特征在于， 所述合路单元还包 括二次合路单元， 与所述一次合路单元和基带处理单元连接， 所述二次合路 单元用于将其它单板传送的经过一次合路处理后的上行信号与经过一次合路 处理后的本单板其它端口接收到的上行信号合路为两路信号。
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