A new base station based on original base station channel merging
By combining radio frequency channels and performing amplitude and phase compensation, nTnR base stations are converted into mTmR base stations, which solves the problem of high network construction costs for 5G base stations, doubles the transmission power and data processing capabilities, and reduces the construction cost of 5G base stations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DATANG MOBILE COMM EQUIP CO LTD
- Filing Date
- 2022-03-03
- Publication Date
- 2026-07-24
AI Technical Summary
The high cost of building 5G base stations is mainly due to the need to replace 4G base stations when upgrading to 5G, which leads to excessive costs.
By combining radio frequency channels and using amplitude and phase compensators and combiners, nTnR base stations are converted into mTmR base stations, thereby doubling the single-channel transmit power and data processing capability while ensuring that the channel performance does not deteriorate.
By merging multiple 4G base station channels into one at low cost, the transmission power and data processing capabilities are doubled, reducing the cost of popularizing 5G base stations.
Smart Images
Figure CN116744478B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wireless communication technology, and in particular to a novel base station based on original base station channel merging. Background Technology
[0002] Compared to 4G (4th Generation Mobile Communication Technology) base stations, 5G (5th Generation Mobile Communication Technology) base stations offer significantly increased data capacity and transmission power. Therefore, in most cases, upgrading 4G base stations to 5G requires replacement, resulting in high 5G network construction costs and becoming a bottleneck for 5G deployment. Summary of the Invention
[0003] The purpose of this application is to provide a novel base station based on the merging of original base station channels, so as to realize the transformation of an nTnR base station into an mTmR base station (n and m are positive integers, and n is a multiple of m) through radio frequency channel merging and amplitude phase compensation, thereby doubling the single-channel transmit power and data processing capability of the base station, while ensuring that other channel performances are not degraded.
[0004] The specific technical solution is as follows:
[0005] According to a first aspect of this application, a novel base station based on original base station channel merging is provided, comprising:
[0006] The original base station includes a baseband processing unit (BBU), a radio frequency remote unit (RRU), an amplitude and phase compensator, and m k-to-1 combiners. The RRU of the original base station contains n radio frequency channels, and each k-to-1 combiner connects to k radio frequency channels, where n = m * k, n, m, and k are all positive integers, and k > 1.
[0007] The BBU of the original base station is used to acquire m initial downlink data.
[0008] The amplitude and phase compensator is used to copy each initial downlink data k times to obtain n downlink data corresponding to the n radio frequency channels, and to perform amplitude compensation and phase compensation on each downlink data based on the pre-calibrated amplitude and phase deviation of each radio frequency channel.
[0009] The RRU of the original base station is used to convert the compensated n downlink data into n downlink signals, and send the n downlink signals to the combiner through the n radio frequency channels; wherein, the k downlink signals of the k radio frequency channels connected to each k-to-1 combiner correspond to the same initial downlink data.
[0010] Each of the k-to-1 combiners is used to combine k downlink signals from k connected radio frequency channels into a single downlink combined signal.
[0011] Optionally, each of the k-to-1 combiners is further configured to acquire one uplink received signal, divide the uplink received signal into k uplink signals, and send the k uplink signals to the RRU of the original base station.
[0012] The RRU of the original base station is also used to receive n uplink signals sent by the k-to-1 combiner through n radio frequency channels and convert the n uplink signals into n uplink data.
[0013] The amplitude and phase compensator is also used to perform amplitude compensation and phase compensation on each uplink data based on the pre-calibrated amplitude and phase deviation of each RF channel, and to merge the k compensated uplink data corresponding to the same combiner to obtain m uplink merged data.
[0014] The BBU of the original base station is also used to acquire the uplink merged data of the m-path.
[0015] Optionally, it also includes: a coupling network, wherein the RRU of the original base station further includes a calibration channel, and the output of the coupling network is connected to the calibration channel;
[0016] The coupling network is used to couple the calibration signals transmitted through each radio frequency channel to obtain the coupling signals corresponding to each radio frequency channel, and to connect the coupling signals to the calibration channel.
[0017] The amplitude and phase compensator is also used to obtain the coupling signals corresponding to each radio frequency channel from the calibration channel, and to perform amplitude and phase calibration on each radio frequency channel based on the amplitude and phase of the standard signal, so as to obtain the amplitude deviation and phase deviation corresponding to each radio frequency channel.
[0018] Optionally, the coupling network includes: m directional couplers and m-to-1 combiners;
[0019] The m directional couplers are respectively placed at the output end of the k-to-1 combiner;
[0020] The input terminal of the m-to-1 combiner is connected to the output terminals of the m directional couplers, and the output terminal of the m-to-1 combiner is connected to the calibration channel.
[0021] Optionally, the coupling network includes: n directional couplers and n-to-1 combiners;
[0022] The n directional couplers are respectively placed at the output end of the n radio frequency channels;
[0023] The input terminal of the n-to-1 combiner is connected to the output terminals of the n directional couplers, and the output terminal of the n-to-1 combiner is connected to the calibration channel.
[0024] Optionally, it also includes: an antenna, said antenna being connected to the m k-to-1 combiners.
[0025] The antenna is used to transmit m downlink combined signals.
[0026] Optionally, the antenna is also used to: receive uplink received signals on the m-channel.
[0027] According to a second aspect of this application, a wireless communication system is also provided, comprising: a novel base station, a core network, and a terminal device according to the first aspect.
[0028] According to a third aspect of this application, a communication device is also provided, comprising: a novel base station according to the first aspect.
[0029] Beneficial effects of the embodiments in this application:
[0030] The novel base station based on original base station channel merging provided in this application includes: a baseband processing unit (BBU) of the original base station, a radio remote unit (RRU) of the original base station, an amplitude and phase compensator, and m k-to-1 combiners; wherein, the RRU of the original base station contains n radio channels, and each k-to-1 combiner connects to k radio channels, n = m * k; the BBU of the original base station is used to acquire m initial downlink data; the amplitude and phase compensator is used to copy each initial downlink data k times to obtain n downlink data corresponding to the n radio channels, and to perform amplitude compensation and phase compensation on each downlink data based on the pre-calibrated amplitude and phase deviation of each radio channel; the RRU of the original base station is used to convert the compensated n downlink data into n downlink signals, and send the n downlink signals to the combiners through the n radio channels; wherein, the k downlink signals of the k radio channels connected to each k-to-1 combiner correspond to the same initial downlink data; each k-to-1 combiner is used to merge the k downlink signals of the connected k radio channels into one downlink combined signal.
[0031] By channel combining, an nTnR base station is converted into an mTmR base station, which increases the single-channel transmit power and data processing capability of the base station several times. Furthermore, amplitude and phase compensation are performed on the n downlink data corresponding to the n radio frequency channels, so that the amplitude and phase of the k-compensated downlink data corresponding to each k-to-1 combiner are consistent, allowing for normal combining without damaging the components.
[0032] As can be seen, in this embodiment, multiple channels of a communication base station are merged into one at a very low cost, achieving a doubling of single-channel transmit power and data processing capability, while ensuring that other channel performance is not degraded. Therefore, some nTnR 4G base stations can be recycled for mTmR 5G base stations, greatly reducing the cost of deploying 5G base stations.
[0033] Of course, implementing any product or method of this application does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.
[0035] Figure 1 A schematic diagram of a novel base station based on the merging of original base station channels, provided as an embodiment of this application;
[0036] Figure 2 This is another structural diagram of a novel base station based on the merging of original base station channels, provided as an embodiment of this application. Detailed Implementation
[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art based on this application are within the scope of protection of this application.
[0038] Compared to 4G base stations, 5G base stations offer significantly increased data capacity and transmission power. Therefore, in most cases, upgrading 4G base stations to 5G requires replacement, resulting in high network construction costs and becoming a bottleneck for 5G deployment.
[0039] A communication base station includes a BBU (Building Baseband Unit) and an RRU (Remote Radio Unit). Based on the number of radio transceiver channels in the RRU, it can be called an nTnR RRU, where n can be 2, 4, 8, 16, 32, 64, etc., T represents the transmit channel, and R represents the receive channel. For example, a 4T4R RRU contains 4 transmit channels and 4 receive channels.
[0040] If the channels of old 4G base stations can be merged, the transmission power of the merged channels will double, and the data processing capability will also double, thus meeting the requirements of some 5G base stations. In other words, 4G base stations with more channels can be used for 5G base stations with fewer channels. For example, an nTnR 4G base station can be transformed into an mTmR 5G base station (n and m are positive integers, and n is a multiple of m).
[0041] However, simply adding an RF power combiner to the RRU input port can lead to improper combining due to differences in signal amplitude and phase after passing through each transmit channel, and may even damage components. On the other hand, from the receiving direction, the received signal from the antenna is split into multiple paths, significantly reducing the signal-to-noise ratio and consequently greatly decreasing the sensitivity of each channel.
[0042] In order to overcome the above technical problems and realize the recycling of 4G base stations for use in 5G base stations through base station channel merging, this application provides a new type of base station based on the merging of original base station channels.
[0043] In this embodiment of the application, the novel base station based on channel merging is based on the original base station, with at least the addition of an amplitude phase compensator and a combiner.
[0044] Specifically, the new base station may include: the baseband processing unit (BBU) of the original base station, the radio frequency remote unit (RRU) of the original base station, the amplitude and phase compensator, and m k-to-1 combiners.
[0045] The original base station's RRU contains n radio frequency channels, and each k-to-1 combiner connects k radio frequency channels, where n = m * k. These radio frequency channels are used for both transmission and reception, so they can be understood as n transmit channels and n receive channels.
[0046] In this embodiment of the application, the BBU of the original base station is used to acquire m initial downlink data;
[0047] An amplitude and phase compensator is used to copy each initial downlink data k times to obtain n downlink data corresponding to n RF channels, and to perform amplitude compensation and phase compensation on each downlink data based on the pre-calibrated amplitude and phase deviation of each RF channel.
[0048] The RRU of the original base station is used to convert the compensated n downlink data into n downlink signals, and send the n downlink signals to the combiner through n radio frequency channels; wherein, the k downlink signals of the k radio frequency channels connected to each k-to-1 combiner correspond to the same initial downlink data;
[0049] Each k-to-1 combiner is used to combine k downlink signals from k connected RF channels into a single downlink combined signal.
[0050] As an example, see Figure 1 , Figure 1 This is a schematic diagram of a novel base station based on the merging of original base station channels provided in an embodiment of this application. Taking n=8 and m=2 as an example, the original 8T8R base station is transformed into a novel 2T2R base station.
[0051] Figure 1 In the example shown, in the downlink direction, there are only two data streams from the core network: channel A data and channel B data. The original base station's BBU can acquire these two initial downlink data streams from the core network.
[0052] Subsequently, the amplitude and phase compensator copies each initial downlink data k times to obtain n downlink data corresponding to n RF channels, and performs amplitude compensation and phase compensation on each downlink data based on the pre-calibrated amplitude and phase deviation of each RF channel.
[0053] The amplitude and phase compensator is a software module. Figure 1 As not shown, the amplitude and phase compensator can be placed in either the BBU or the RRU. In other words, the process of amplitude and phase compensation for the downlink data corresponding to each radio frequency channel can be performed in either the BBU or the RRU.
[0054] The amplitude and phase deviations of each RF channel are pre-calibrated; the specific calibration method can be found below.
[0055] The amplitude and phase compensator copies each data stream k times, resulting in a total of m*k=n downlink data streams. Each downlink data stream corresponds to one radio frequency channel. Based on the pre-calibrated amplitude and phase deviations of each radio frequency channel, amplitude compensation and phase compensation are performed on each downlink data stream respectively.
[0056] Figure 1 In the example shown, the channel A data is copied into 4 copies, namely channel 1-4 data, corresponding to RF channels 1-4 respectively; the channel B data is copied into 4 copies, namely channel 5-8 data, corresponding to RF channels 5-8 respectively.
[0057] Subsequently, the RRU of the original base station converts the compensated n downlink data into n downlink signals, and sends the n downlink signals to the combiner through n radio frequency channels; wherein, the k downlink signals of the k radio frequency channels connected to each k-to-1 combiner correspond to the same initial downlink data. Each k-to-1 combiner is used to combine the k downlink signals of the connected k radio frequency channels into one downlink combined signal.
[0058] Figure 1In the example shown, the 4-to-1 combiner connects to RF interfaces ANT1-ANT4, combining the signals from RF channels 1-4 into one channel, which is then transmitted to the antenna via RF interface ANTA.
[0059] As can be seen, the original base station 8T8R RRU, plus two 4-in-1 combiners, constitutes the new base station 2T2R RRU.
[0060] Since the downlink data of RF channels 1-4 has undergone amplitude and phase compensation, the amplitude and phase of the four downlink signals of RF channels 1-4 are the same, so they can be merged without damaging the components.
[0061] Similarly, the signals from RF channels 5-8 are combined to obtain another downlink combined signal.
[0062] visible, Figure 1 In the example shown, the original 8T8R RRU base station, plus two 4-to-1 combiners, constitutes a new 2T2R RRU base station. That is, the 8 radio frequency signals are combined into 2 transmit signals after passing through the radio frequency channel combining device. Since the 8 transmit channels have been calibrated, the transmit signals of channels 1-4 are completely equal in amplitude and phase, and the transmit signals of channels 5-8 are completely equal in amplitude and phase. After combining, the signal power at the ANT A port and ANT B port becomes 4 times the downlink signal power before combining.
[0063] It is evident that by channel merging, an nTnR base station is converted into an mTmR base station, which increases the single-channel transmit power and data processing capability of the base station several times. Furthermore, for the n downlink data corresponding to the n radio frequency channels, amplitude compensation and phase compensation are performed, so that the amplitude and phase of the k-compensated downlink data corresponding to each k-to-1 combiner are consistent, allowing for normal merging without damaging the components.
[0064] In this embodiment, multiple channels of a communication base station are merged into one at a very low cost, doubling the single-channel transmit power and data processing capability while ensuring that other channel performance is not degraded. Therefore, some nTnR 4G base stations can be recycled for mTmR 5G base stations, greatly reducing the cost of deploying 5G base stations.
[0065] In one embodiment of this application, each k-to-1 combiner is further configured to acquire one uplink received signal, divide the uplink received signal into k uplink signals, and send the k uplink signals to the RRU of the original base station.
[0066] The RRU of the original base station is also used to receive n uplink signals sent by the k-to-1 combiner through n radio frequency channels and convert the n uplink signals into n uplink data;
[0067] The amplitude and phase compensator is also used to compensate the amplitude and phase of each uplink data based on the pre-calibrated amplitude and phase deviation of each RF channel, and to merge the k compensated uplink data corresponding to the same combiner to obtain m uplink merged data.
[0068] The original base station's BBU is also used to acquire uplink merged data from the m-path.
[0069] by Figure 1 Taking the example of the uplink direction, the uplink signal is received through the antenna and then transmitted to the combiner. Each 4-to-1 combiner can acquire one uplink received signal.
[0070] The two uplink signals received by the antenna are split into four paths after passing through two 4-to-1 combiners, resulting in a 6dB decrease in the signal-to-noise ratio (SNR). However, an amplitude and phase compensator performs amplitude and phase compensation on each uplink data path separately, and then combines the four paths into one. After amplitude and phase compensation, the four data paths are of equal amplitude and direction, and the noise is random. Therefore, the SNR is improved by another 6dB after the four paths are superimposed. Overall, the SNR of the uplink signal is not degraded, thus ensuring the quality of the uplink signal.
[0071] therefore, Figure 1 In the example shown, the BBU of the original base station eventually obtains the combined uplink data from the two channels, which the BBU can then send to the core network.
[0072] As can be seen, in this embodiment, multiple channels of a communication base station are merged into one at a very low cost, achieving a doubling of single-channel transmit power and data processing capability, while ensuring that other channel performance is not degraded. Therefore, some nTnR 4G base stations can be recycled for mTmR 5G base stations, greatly reducing the cost of deploying 5G base stations.
[0073] In one embodiment of this application, it may further include: a coupling network, wherein the RRU of the original base station also includes a calibration channel.
[0074] In one embodiment of this application, the coupling network includes: m directional couplers and m-to-1 combiners; the m directional couplers are respectively placed at the output terminals of the m-to-1 combiners; the input terminals of the m-to-1 combiners are connected to the output terminals of the m directional couplers, and the output terminals of the m-to-1 combiners are connected to a calibration channel.
[0075] As an example, see Figure 2 , Figure 2 This is a schematic diagram of another structure of a novel base station based on the merging of original base station channels, provided in an embodiment of this application. Figure 2In the example shown, n=8, m=2, k=4, then the two couplers are placed at the output of the k-to-1 combiner, and the input of the 2-to-1 combiner is connected to the output of the m directional couplers. The output of the m-to-1 combiner is connected to the calibration channel.
[0076] In this embodiment of the disclosure, the coupling network and calibration channel are used to calibrate the amplitude and phase of each radio frequency channel.
[0077] Specifically, during the calibration process, the calibration signal is sequentially connected to each radio frequency channel. The directional coupler couples the calibration signal transmitted through each radio frequency channel to obtain the corresponding coupled signal for each radio frequency channel, and then connects the coupled signal to the calibration channel.
[0078] Therefore, the amplitude and phase compensator can obtain the coupling signals corresponding to each RF channel from the calibration channel. These coupling signals have differences in amplitude and phase. In order to perform amplitude and phase calibration, a standard signal can be determined, such as selecting the coupling signal corresponding to a certain RF channel as the standard signal, or selecting the average signal of the coupling signals corresponding to each RF channel as the standard signal.
[0079] Using a standard signal as a reference, amplitude and phase calibration can be performed on each radio frequency channel to obtain the amplitude and phase deviations of each radio frequency channel, which can then be used as the basis for subsequent amplitude and phase compensation of each radio frequency channel.
[0080] In one embodiment of this application, the coupling network may also include: n directional couplers and an n-to-1 combiner; the n directional couplers are respectively placed at the output ends of the n radio frequency channels; the input end of the n-to-1 combiner is connected to the output ends of the n directional couplers, and the output end of the n-to-1 combiner is connected to the calibration channel.
[0081] Specifically, the coupling network can also be placed directly at the output of n RF channels without being connected to the k-to-1 combiner. In this case, n directional couplers and an n-to-1 combiner are required.
[0082] In one embodiment of this application, the novel base station based on the merging of original base station channels further includes an antenna connected to m k-to-1 combiners.
[0083] In the downlink direction, the antenna is used to transmit m downlink combined signals; in the uplink direction, the antenna is used to receive m uplink received signals.
[0084] This application also provides a wireless communication system, including: a novel base station, a core network, and terminal equipment.
[0085] The novel base station provided in this application embodiment can be applied to wireless communication systems, such as 5G communication systems. Specifically, the original nTnR 4G base station is transformed into an mTmT 5G base station and applied to a 5G communication system, that is, it connects to terminal devices within the coverage area and accesses the core network. Through the connection between the base station and the core network, and the connection between the base station and the terminal devices, communication between the terminal devices is realized.
[0086] This application also provides a communication device, including: a novel base station.
[0087] Specifically, new base stations based on the merging of original base station channels can be integrated into various communication devices, such as emergency communication vehicles and drones, to form ground-based mobile base stations or airborne base stations, which can then be applied to special scenarios.
[0088] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).
[0089] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0090] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application are included within the scope of protection of this application.
Claims
1. A novel base station based on original base station channel merging, characterized in that, include: The original base station includes a baseband processing unit (BBU), a radio frequency remote unit (RRU), an amplitude and phase compensator, and m k-to-1 combiners. The RRU of the original base station contains n radio frequency channels, and each k-to-1 combiner connects to k radio frequency channels, where n = m * k, n, m, and k are all positive integers, and k > 1. The BBU of the original base station is used to acquire m initial downlink data. The amplitude and phase compensator is used to copy each initial downlink data k times to obtain n downlink data corresponding to the n radio frequency channels, and to perform amplitude compensation and phase compensation on each downlink data based on the pre-calibrated amplitude and phase deviation of each radio frequency channel. The RRU of the original base station is used to convert the compensated n downlink data into n downlink signals, and send the n downlink signals to the combiner through the n radio frequency channels; wherein, the k downlink signals of the k radio frequency channels connected to each k-to-1 combiner correspond to the same initial downlink data. Each of the k-to-1 combiners is used to combine k downlink signals from k connected radio frequency channels into a single downlink combined signal.
2. The base station according to claim 1, characterized in that, Each of the k-to-1 combiners is also used to acquire one uplink received signal, divide the uplink received signal into k uplink signals, and send the k uplink signals to the RRU of the original base station; The RRU of the original base station is also used to receive n uplink signals sent by the k-to-1 combiner through n radio frequency channels and convert the n uplink signals into n uplink data. The amplitude and phase compensator is also used to perform amplitude compensation and phase compensation on each uplink data based on the pre-calibrated amplitude and phase deviation of each RF channel, and to merge the k compensated uplink data corresponding to the same combiner to obtain m uplink merged data. The BBU of the original base station is also used to acquire the uplink merged data of the m-path.
3. The base station according to claim 1, characterized in that, Also includes: The coupling network, wherein the RRU of the original base station also includes a calibration channel, and the output of the coupling network is connected to the calibration channel; The coupling network is used to couple the calibration signals transmitted through each radio frequency channel to obtain the coupling signals corresponding to each radio frequency channel, and to connect the coupling signals to the calibration channel. The amplitude and phase compensator is also used to obtain the coupling signals corresponding to each radio frequency channel from the calibration channel, and to perform amplitude and phase calibration on each radio frequency channel based on the amplitude and phase of the standard signal, so as to obtain the amplitude deviation and phase deviation corresponding to each radio frequency channel.
4. The base station according to claim 3, characterized in that, The coupling network includes: m directional couplers and m combiners; The m directional couplers are respectively placed at the output end of the k-to-1 combiner; The input terminal of the m-to-1 combiner is connected to the output terminals of the m directional couplers, and the output terminal of the m-to-1 combiner is connected to the calibration channel.
5. The base station according to claim 3, characterized in that, The coupling network includes: n directional couplers and n-to-1 combiners; The n directional couplers are respectively placed at the output end of the n radio frequency channels; The input terminal of the n-to-1 combiner is connected to the output terminals of the n directional couplers, and the output terminal of the n-to-1 combiner is connected to the calibration channel.
6. The base station according to claim 1, characterized in that, The original base station was a 4G base station, and the new base station was a 5G base station.
7. The base station according to claim 2, characterized in that, Also includes: Antenna, the antenna being connected to the m k-to-1 combiners, The antenna is used to transmit m downlink combined signals.
8. The base station according to claim 7, characterized in that, The antenna is also used to receive uplink signals from the m-channel.
9. A wireless communication system, characterized in that, include: The novel base station, core network, and terminal equipment as described in any one of claims 1-8.
10. A communication device, characterized in that, include: The novel base station as described in any one of claims 1-8.