CN113965934A - Forward communication method and radio remote unit - Google Patents
Forward communication method and radio remote unit Download PDFInfo
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Abstract
The invention provides a forward communication method and a radio remote unit, belonging to the technical field of wireless communication, wherein the method comprises the following steps: receiving first information sent by a previous-stage radio remote unit or a baseband processing unit, wherein the first information comprises downlink data; and copying the first information and sending the copied first information to a radio remote unit at the next stage. The invention can realize the cascade deployment of the distributed base station multi-channel RRU, save the deployment quantity of optical fibers and reduce the network construction cost.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a forward communication method and a remote radio unit.
Background
Referring to fig. 1, in the current cascading scheme of the distributed base station, the forwarding interface adopts a step-by-step superposition scheme, and each step adopts a rate compression scheme. The Radio Remote Unit (RRU) of the stage connected to the Baseband processing Unit (BBU) has the largest interface rate, which is the superposition of the forward transmission rates of the RRU units of each stage. However, if the single-stage rate is too high, the cascade connection cannot be supported, and each RRU can only be deployed in a fiber direct drive manner, which results in a multiplied increase in the number of optical fibers for engineering deployment.
Disclosure of Invention
In view of this, the present invention provides a forward communication method and a radio remote unit, which are used to solve the problem that if the single-stage rate of the existing distributed base station is too high, the existing distributed base station can only be deployed in an optical fiber direct drive manner, and cannot be deployed in a cascade manner, so that the number of optical fibers deployed in engineering is multiplied.
To solve the above technical problem, in a first aspect, the present invention provides a forward communication method applied to a radio remote unit, including:
receiving first information sent by a previous-stage radio remote unit or a baseband processing unit, wherein the first information comprises downlink data;
and copying the first information and sending the copied first information to a radio remote unit at the next stage.
Optionally, the first information further includes downlink pre-correction information of each cascaded radio remote unit;
after receiving the first information sent by the upper-stage radio remote unit or the baseband processing unit, the method further includes:
and performing downlink pre-correction according to the downlink pre-correction information of the radio remote unit.
Optionally, the forwarding communication method further includes:
receiving an uplink signal sent by a terminal and second information sent by a next-stage radio remote unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage radio remote unit and the uplink signal received by the first radio remote unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
combining the uplink signal received from the terminal with the first signal to obtain a second signal;
and sending the second signal to a previous radio remote unit or a baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
determining a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and according to the maximum ratio combining weight of the radio remote unit, performing maximum ratio combining on the signal received by the radio remote unit and the first signal.
Optionally, after receiving the uplink signal sent by the terminal, the method further includes:
performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
and combining the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
In a second aspect, the present invention further provides a forwarding communication method, applied to a radio remote unit, including:
receiving an uplink signal sent by a terminal and second information sent by a next-stage radio remote unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage radio remote unit and the uplink signal received by the first radio remote unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
combining the uplink signal received from the terminal with the first signal to obtain a second signal;
and sending the second signal to a previous radio remote unit or a baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
determining a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and according to the maximum ratio combining weight of the radio remote unit, performing maximum ratio combining on the signal received by the radio remote unit and the first signal.
Optionally, after receiving the uplink signal sent by the terminal, the method further includes:
performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
and combining the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
In a third aspect, the present invention further provides a remote radio unit, including:
the first receiving module is used for receiving first information sent by a previous-stage radio remote unit or a baseband processing unit, wherein the first information comprises downlink data;
and the copying module is used for copying the first information and sending the copied first information to a next-stage radio remote unit.
Optionally, the first information further includes downlink pre-correction information of each cascaded radio remote unit;
the remote radio unit further comprises:
and the pre-correction module is used for performing downlink pre-correction according to the downlink pre-correction information of the radio remote unit.
Optionally, the remote radio unit further includes:
the second receiving module is used for receiving an uplink signal sent by the terminal and second information sent by the next-stage remote radio unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage remote radio unit and the uplink signal received by the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
a combining module, configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
and the sending module is used for sending the second signal to the upper-stage radio remote unit or the baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the merging module comprises:
a weight determining unit, configured to determine a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and a combining unit, configured to perform maximum ratio combining on the signal received by the radio remote unit and the first signal according to the maximum ratio combining weight of the radio remote unit.
Optionally, the remote radio unit further includes:
the signal processing module is used for performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
and the combining module is configured to combine the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
In a fourth aspect, the present invention further provides a remote radio unit, including:
the second receiving module is used for receiving an uplink signal sent by the terminal and second information sent by the next-stage remote radio unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage remote radio unit and the uplink signal received by the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
a combining module, configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
and the sending module is used for sending the second signal to the upper-stage radio remote unit or the baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the merging module comprises:
a weight determining unit, configured to determine a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and a combining unit, configured to perform maximum ratio combining on the signal received by the radio remote unit and the first signal according to the maximum ratio combining weight of the radio remote unit.
Optionally, the remote radio unit further includes:
the signal processing module is used for performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
and the combining module is configured to combine the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
In a fifth aspect, the present invention further provides a remote radio unit, including: a transceiver and a processor;
the transceiver is configured to receive first information sent by a previous-stage radio remote unit or a baseband processing unit, where the first information includes downlink data;
the processor is configured to copy the first information;
the transceiver is further configured to send the copied first information to a next-stage radio remote unit.
Optionally, the first information further includes downlink pre-correction information of each cascaded radio remote unit;
the processor is further configured to perform downlink pre-correction according to the downlink pre-correction information of the remote radio unit.
Optionally, the transceiver is further configured to receive an uplink signal sent by the terminal and second information sent by the next-stage remote radio unit, where the second information includes a first signal obtained by combining uplink signals received by the next-stage remote radio unit and the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
the processor is further configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
the transceiver is further configured to send the second signal to the upper-stage remote radio unit or the baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the processor is further configured to determine a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
the processor is further configured to perform maximum ratio combining on the signal received by the radio remote unit and the first signal according to the maximum ratio combining weight of the radio remote unit.
Optionally, the processor is further configured to perform fast fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal, so as to obtain a frequency signal corresponding to the uplink signal;
the processor is further configured to combine the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
In a sixth aspect, the present invention further provides a remote radio unit, including: a transceiver and a processor;
the transceiver is used for receiving an uplink signal sent by the terminal and second information sent by the next-stage remote radio unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage remote radio unit and the uplink signal received by the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
the processor is configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
the transceiver is further configured to send the second signal to the upper-stage remote radio unit or the baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the processor is further configured to determine a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
the processor is further configured to perform maximum ratio combining on the signal received by the radio remote unit and the first signal according to the maximum ratio combining weight of the radio remote unit.
Optionally, the processor is further configured to perform fast fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal, so as to obtain a frequency signal corresponding to the uplink signal;
the processor is further configured to combine the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
In a seventh aspect, the present invention further provides a remote radio unit, including a memory, a processor, and a program stored in the memory and executable on the processor; the processor implements the steps of any of the aforementioned fronthaul communication methods when executing the program.
In an eighth aspect, the present invention further provides a remote radio unit, including a memory, a processor, and a program stored in the memory and executable on the processor; the processor implements the steps of any of the aforementioned fronthaul communication methods when executing the program.
In a ninth aspect, the present invention further provides a readable storage medium, on which a program is stored, which when executed by a processor implements the steps in any of the forwarding communication methods described above.
The technical scheme of the invention has the following beneficial effects:
the embodiment of the invention can realize the cascade deployment of the distributed base station multi-channel RRU, save the deployment quantity of optical fibers and reduce the network construction cost.
Drawings
Fig. 1 is a schematic diagram of data transmission of a current distributed base station cascaded remote radio unit;
fig. 2 is a schematic view of light direct-drive deployment of remote radio units of a distributed base station;
fig. 3 is a flowchart illustrating a method of forwarding communication according to an embodiment of the present invention;
fig. 4 is a schematic diagram of downlink data transmission of a cascaded radio remote unit in a fronthaul communication mode according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating an embodiment of moving up a downlink pre-deskew function to a remote radio unit;
fig. 6 is a schematic diagram of data transmission of a cascaded remote radio unit according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a cascade deployment of a multi-channel remote radio unit in an embodiment of the present application;
fig. 8 is a flowchart illustrating a forwarding communication method according to a second embodiment of the present invention;
fig. 9 is a schematic structural diagram of a remote radio unit according to a third embodiment of the present invention;
fig. 10 is a schematic structural diagram of a remote radio unit according to a fourth embodiment of the present invention;
fig. 11 is a schematic structural diagram of a remote radio unit according to a fifth embodiment of the present invention;
fig. 12 is a schematic structural diagram of a remote radio unit according to a sixth embodiment of the present invention;
fig. 13 is a schematic structural diagram of a remote radio unit according to a seventh embodiment of the present invention;
fig. 14 is a schematic structural diagram of an rf remote unit in an eighth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
For the distributed base station, the cascade number of different products depends on the number of channels. When the frequency spectrum is relatively high, in order to ensure the coverage distance and the coverage performance, 8-channel RRU is used for networking, because the signal bandwidth is very wide, the industry has a requirement of 160M, even 200M. The device forward interface generally adopts the original scheme, and cannot support the cascade capacity due to the fact that the single-stage rate is too high. Causing the number of optical fibers deployed by engineering to multiply. For example, when a network is deployed along a track, in order to reduce the number of cell switching and improve the experience of users, a scheme of combining multiple RRUs in a cell is generally adopted, the number of cell combinations is between 8 and 12 at present, when 8-channel RRUs are adopted for network establishment, each RRU can only be deployed in a fiber direct drive manner as shown in fig. 2, and cannot be deployed in a cascade manner, so that the number of deployed fibers is multiplied. To solve the problem, embodiments of the present invention provide a scheme for reducing a cascade rate reduction rate of a forward interface, so that each RRU of a distributed base station can be deployed in a cascade manner, and the number of optical fibers required to be used is reduced, which is specifically referred to as follows.
Referring to fig. 3, fig. 3 is a flowchart illustrating a forward communication method according to an embodiment of the present invention, where the method is applied to a radio remote unit, and includes the following steps:
step 31: receiving first information sent by a previous-stage radio remote unit or a baseband processing unit, wherein the first information comprises downlink data;
step 32: and copying the first information and sending the copied first information to a radio remote unit at the next stage.
It should be noted that, in the embodiment of the present invention, for two adjacent cascaded RRUs, an upper stage RRU is close to the BBU, and a lower stage RRU is far from the BBU. For the remote radio unit, if the previous stage of cascade is a remote radio unit, the first information sent by the previous stage of remote radio unit is received, and if the previous stage of cascade is a baseband processing unit, the first information sent by the baseband processing unit is received.
In the embodiment of the present invention, a rate reduction scheme of a cascaded fronthaul interface is considered from a downlink perspective, specifically, since a plurality of RRUs have already performed cell merging, downlink information sent by each RRU is the same, and therefore, in the embodiment of the present invention, downlink data is sent as one piece of information, a previous stage of RRU no longer only undertakes a forwarding function, and an undertaking copy function is added, so as shown in fig. 4, each stage of RRU only transmits 1 piece of data, and even an RRU directly connected to a BBU only needs to transmit 1 piece of data instead of multiple pieces of data on a cascaded link, thereby effectively reducing a downlink transmission rate, or effectively reducing a downlink transmission bandwidth.
In an optional specific embodiment, the first information further includes downlink pre-deskew information of each radio remote unit in cascade connection;
after receiving the first information sent by the upper-stage radio remote unit or the baseband processing unit, the method further includes:
and performing downlink pre-correction according to the downlink pre-correction information of the radio remote unit.
For network deployment along a high-speed rail, due to different Doppler frequency offset at each RRU, if a uniform piece of data is adopted, the performance is deteriorated. To solve this problem, please refer to fig. 5, in the embodiment of the present invention, the downlink pre-rectification function is moved up to the RRUs, and each RRU independently performs pre-rectification processing to ensure performance. The downlink pre-deviation information can be cell-level or user-level, the data volume is small, and the RRU is distributed along with the data.
That is to say, in the embodiment of the present invention, one piece of data transmitted by each stage of RRU includes downlink data, and also includes downlink pre-deskew information required by each stage of RRU for pre-deskew processing.
In other optional embodiments, the first information may only include downlink pre-deskew information of the remote radio unit and each remote radio unit cascaded after the remote radio unit.
That is, after each stage of RRU receives first information sent by a previous stage of radio remote unit (if the RRU is an RRU directly connected to the BBU, it is a baseband processing unit), and acquires downlink pre-rectification information of the RRU therefrom, it deletes the downlink pre-rectification information of the RRU from the first information, and sends the first information from which the downlink pre-rectification information of the RRU is deleted to a next stage of RRU.
Optionally, the forwarding communication method further includes:
receiving an uplink signal sent by a terminal and second information sent by a next-stage radio remote unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage radio remote unit and the uplink signal received by the first radio remote unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
in other words, the second information includes a first signal obtained by combining uplink signals received by all the radio remote units cascaded after the current radio remote unit.
Combining the uplink signal received from the terminal with the first signal to obtain a second signal;
and sending the second signal to a previous radio remote unit or a baseband processing unit. Specifically, if the radio remote unit is cascaded to a previous stage of the radio remote unit, the second signal is sent to the previous stage of the radio remote unit, and if the radio remote unit is cascaded to a previous stage of the baseband processing unit, the second signal is sent to the baseband processing unit.
In the embodiment of the present invention, a rate reduction scheme of a cascaded fronthaul interface is also considered from an uplink perspective, specifically, each stage of RRUs combines an uplink signal received by the RRUs from a terminal with an uplink signal received by each stage of RRUs after the RRUs, and the combined signal can transmit the uplink signal received by the multiple stages of RRUs only with one-stage transmission bandwidth, so that the uplink transmission rate is effectively reduced, or the transmission bandwidth is effectively reduced.
Further optionally, the first signal is a signal combined by using a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
determining a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and according to the maximum ratio combining weight of the radio remote unit, performing maximum ratio combining on the signal received by the radio remote unit and the first signal.
Since the uplink data information received by each RRU is different, as shown in fig. 1, in the current scheme, each stage of RRU needs to upload the uplink data information to the BBU. After uploading to the BBU, in baseband combining, a Maximum Ratio Combining (MRC) scheme is generally adopted, and the fronthaul transmission pressure is large.
Specifically, the baseband combining scheme is as follows: assuming 4-stage concatenation, S1, S2, S3 and S4 are 4 signals received by each RRU in diversity, each signal has amplitude a1 (power-open), a2, A3 and a4, and each signal in MRC combining has weight W1, W2, W3 and W4, and the relationship is:
W1/A1＝W2/A2＝W3/A3＝W4/A4；
the combined signal was W1 × S1+ W2 × S2+ W3 × S3+ W4 × S4.
In the embodiment of the invention, the base band combining function is moved up to the RRU, the uplink data of the RRU is processed step by step, and the MRC function is realized in the RRU in a grading way, so that the transmission rate is reduced, but the MRC function is not influenced. The combined signal only needs to occupy 1 part of the transmission rate of the RRU fronthaul interface, and the maximum ratio combined weight of the next-stage radio remote unit and the amplitude value of the uplink signal received by the next-stage radio remote unit occupy one part of the transmission rate of the RRU fronthaul interface, so that the signal transmission of the cascaded multi-stage RRUs can be realized by 2 times of the rate of the fronthaul interface of the RRU, or the capacity of transmitting multi-stage RRU data is realized by adopting two-stage transmission bandwidths.
Specifically, referring to fig. 6, an uplink signal S1 received by the RRU1 may be directly transmitted to the RRU2, and after the RRU2 receives the uplink signal S1, weights of the uplink signal S1 and an uplink signal S2 received by the RRU2 from the terminal need to be calculated, where the weight relationships are as follows: w1/a1 ═ W2/a 2. Then, the two signals are combined into one signal S2' ═ W1 × S1+ W2 × S2.
Since the RRU of the previous stage also needs to calculate the proportional relationship between the uplink signals S3 and S2 received from the terminal, a2, W2, and S2' must be uploaded to the RRU3 of the previous stage together. After receiving an uplink signal S3 sent by the terminal, the RRU3 calculates a weight W3, where W3/A3 is W2/a2, and combines signals S3 and S2 ' to obtain S3 ', and S3 ' is W1 is S1+ W2 is S2+ W3 is S3.
Since the RRU of the previous stage also needs to calculate the proportional relationship between the uplink signals S4 and S3 received from the terminal, A3, W3 and S3' must be transmitted together to the RRU of the previous stage 4. The RRU4 sequentially processes according to the processing mode of the RRU3, performs signal combination, and transmits the amplitude value and weight value of the signal of the current stage to the previous stage until the signal is transmitted to the BBU.
The BBU combined signal is S' ═ W1 × S1+ W2 × S2+ W3 × S3+ … + Wn × Sn, and has the same combining effect as that of each RRU transmitting all uplink signals received from the terminal to the BBU.
Optionally, after receiving the uplink signal sent by the terminal, the method further includes:
performing Fast Fourier Transform (FFT) and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
and combining the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
In the embodiment of the present invention, the FFT function is moved up to the RRU, so as to ensure that a frequency signal (or frequency domain data) is obtained at the RRU, and opt7 may be used for segmentation. In addition, in order to ensure the communication performance, the frequency offset estimation function is also moved up to the RRU. That is to say, after receiving the uplink signal from the terminal, the RRU may directly obtain the corresponding frequency signal, so as to directly calculate the power of the uplink signal, and then obtain the amplitude value.
In summary, the embodiment of the present invention provides a rate reduction scheme for a downlink deployment fronthaul interface under a cell merging condition, which can support multi-level concatenation of multiple channel RRUs, that is, by using the fronthaul communication method provided in the embodiment of the present invention, multiple channel RRUs can be deployed according to the concatenation manner in fig. 7.
Referring to fig. 8, fig. 8 is a flowchart illustrating a forward communication method according to a second embodiment of the present invention, where the method is applied to a radio remote unit, and includes the following steps:
step 81: receiving an uplink signal sent by a terminal and second information sent by a next-stage radio remote unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage radio remote unit and the uplink signal received by the first radio remote unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
step 82: combining the uplink signal received from the terminal with the first signal to obtain a second signal;
step 83: and sending the second signal to a previous radio remote unit or a baseband processing unit.
In the embodiment of the present invention, a rate reduction scheme of a cascaded fronthaul interface is considered from an uplink perspective, and specifically, each stage of RRU combines an uplink signal received by the RRU from a terminal with an uplink signal received by each stage of RRU after the RRU, and the combined signal can transmit the uplink signal received by the multiple stages of RRUs only with a transmission bandwidth of one stage, so that an uplink transmission rate is effectively reduced, or the transmission bandwidth is effectively reduced.
The above mentioned forwarding communication method is exemplified below.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
determining a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and according to the maximum ratio combining weight of the radio remote unit, performing maximum ratio combining on the signal received by the radio remote unit and the first signal.
Optionally, after receiving the uplink signal sent by the terminal, the method further includes:
performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
and combining the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
Specific implementation schemes and beneficial effects that can be achieved by the embodiments of the present invention are detailed in the first embodiment, and are not described herein again.
In addition, the embodiment of the present invention also considers a rate reduction scheme of a cascaded fronthaul interface from a downlink perspective, and specifically, since multiple RRUs have already performed cell merging, downlink information sent by each RRU is the same, so the embodiment of the present invention issues downlink data as one piece of information, and a previous stage RRU no longer only undertakes a forwarding function, and increases an undertaking copy function, so as shown in fig. 4, each stage of RRU only transmits 1 piece of data, and even if the RRU directly connected to the BBU only needs to transmit 1 piece of data instead of multiple pieces of data on the cascaded link, thereby effectively reducing a downlink transmission rate, or effectively reducing a downlink transmission bandwidth. The specific implementation scheme is described in detail in the first embodiment, and is not described again here.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a remote radio unit according to a third embodiment of the present invention, where the remote radio unit 90 includes:
a first receiving module 91, configured to receive first information sent by a previous radio remote unit or a baseband processing unit, where the first information includes downlink data;
the copying module 92 is configured to copy the first information, and send the copied first information to a next-stage remote radio unit.
Optionally, the first information further includes downlink pre-correction information of each cascaded radio remote unit;
the remote radio unit 90 further includes:
and the pre-correction module is used for performing downlink pre-correction according to the downlink pre-correction information of the radio remote unit.
Optionally, the remote radio unit 90 further includes:
the second receiving module is used for receiving an uplink signal sent by the terminal and second information sent by the next-stage remote radio unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage remote radio unit and the uplink signal received by the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
a combining module, configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
and the sending module is used for sending the second signal to the upper-stage radio remote unit or the baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the merging module comprises:
a weight determining unit, configured to determine a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and a combining unit, configured to perform maximum ratio combining on the signal received by the radio remote unit and the first signal according to the maximum ratio combining weight of the radio remote unit.
Optionally, the remote radio unit 90 further includes:
the signal processing module is used for performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
and the combining module is configured to combine the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
The embodiment of the present invention is a product embodiment corresponding to the above method embodiment, and therefore, detailed description is omitted here, and please refer to the first embodiment in detail.
Referring to fig. 10, fig. 10 is a schematic structural diagram of a remote radio unit according to a fourth embodiment of the present invention, where the remote radio unit 100 includes:
a second receiving module 101, configured to receive an uplink signal sent by a terminal and second information sent by a next-stage remote radio unit, where the second information includes a first signal obtained by combining uplink signals received by the next-stage remote radio unit and the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
a combining module 102, configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
the sending module 103 is configured to send the second signal to the upper-stage remote radio unit or the baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the merging module 102 includes:
a weight determining unit, configured to determine a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and a combining unit, configured to perform maximum ratio combining on the signal received by the radio remote unit and the first signal according to the maximum ratio combining weight of the radio remote unit.
Optionally, the remote radio unit 100 further includes:
the signal processing module is used for performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
and the combining module is configured to combine the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
The embodiment of the present invention is a product embodiment corresponding to the above method embodiment, and therefore, detailed description is omitted here, and please refer to the second embodiment.
Referring to fig. 11, fig. 11 is a schematic structural diagram of a remote radio unit according to a fifth embodiment of the present invention, where the remote radio unit 110 includes: a transceiver 111 and a processor 112;
the transceiver 111 is configured to receive first information sent by a previous radio remote unit or a baseband processing unit, where the first information includes downlink data;
the processor 112, configured to copy the first information;
the transceiver 111 is further configured to send the copied first information to a remote radio unit of a next stage.
Optionally, the first information further includes downlink pre-correction information of each cascaded radio remote unit;
the processor 112 is further configured to perform downlink pre-rectification according to the downlink pre-rectification information of the remote radio unit.
Optionally, the transceiver 111 is further configured to receive an uplink signal sent by a terminal and second information sent by a next-stage remote radio unit, where the second information includes a first signal obtained by combining uplink signals received by the next-stage remote radio unit and the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
the processor 112 is further configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
the transceiver 111 is further configured to send the second signal to a previous remote radio unit or a baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the processor 112 is further configured to determine a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
the processor 112 is further configured to perform maximum ratio combining on the signal received by the radio remote unit and the first signal according to the maximum ratio combining weight of the radio remote unit.
Optionally, the processor 112 is further configured to perform fast fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal, so as to obtain a frequency signal corresponding to the uplink signal;
the processor 112 is further configured to combine the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
The embodiment of the present invention is a product embodiment corresponding to the above method embodiment, and therefore, detailed description is omitted here, and please refer to the first embodiment in detail.
Referring to fig. 12, fig. 12 is a schematic structural diagram of a remote radio unit according to a sixth embodiment of the present invention, where the remote radio unit 120 includes: a transceiver 121 and a processor 122;
the transceiver 121 is configured to receive an uplink signal sent by a terminal and second information sent by a next-stage remote radio unit, where the second information includes a first signal obtained by combining uplink signals received by the next-stage remote radio unit and the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
the processor 122 is configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
the transceiver 121 is further configured to send the second signal to a previous remote radio unit or a baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the processor 122 is further configured to determine a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
the processor 122 is further configured to perform maximum ratio combining on the signal received by the radio remote unit and the first signal according to the maximum ratio combining weight of the radio remote unit.
Optionally, the processor 122 is further configured to perform fast fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal, so as to obtain a frequency signal corresponding to the uplink signal;
the processor 122 is further configured to combine the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
The embodiment of the present invention is a product embodiment corresponding to the above method embodiment, and therefore, detailed description is omitted here, and please refer to the second embodiment.
Referring to fig. 13, fig. 13 is a schematic structural diagram of a remote radio unit according to a seventh embodiment of the present invention, where the remote radio unit 130 includes a processor 131, a memory 132, and a program stored in the memory 132 and capable of running on the processor 131; the processor 131, when executing the program, implements the following steps:
receiving first information sent by a previous-stage radio remote unit or a baseband processing unit, wherein the first information comprises downlink data;
and copying the first information and sending the copied first information to a radio remote unit at the next stage.
Optionally, the first information further includes downlink pre-correction information of each cascaded radio remote unit; the processor 131 may further implement the following steps when executing the program:
after receiving the first information sent by the upper-stage radio remote unit or the baseband processing unit, the method further includes:
and performing downlink pre-correction according to the downlink pre-correction information of the radio remote unit.
Optionally, when the processor 131 executes the program, the following steps may be further implemented:
receiving an uplink signal sent by a terminal and second information sent by a next-stage radio remote unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage radio remote unit and the uplink signal received by the first radio remote unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
combining the uplink signal received from the terminal with the first signal to obtain a second signal;
and sending the second signal to a previous radio remote unit or a baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit; the processor 131 may further implement the following steps when executing the program:
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
determining a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and according to the maximum ratio combining weight of the radio remote unit, performing maximum ratio combining on the signal received by the radio remote unit and the first signal.
Optionally, when the processor 131 executes the program, the following steps may be further implemented:
after receiving the uplink signal sent by the terminal, the method further includes:
performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
and combining the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
The specific working process of the embodiment of the present invention is the same as that of the first embodiment of the method, and therefore, detailed description is not repeated here, and please refer to the description of the method steps in the first embodiment.
Referring to fig. 14, fig. 14 is a schematic structural diagram of an rf remote unit according to an eighth embodiment of the present invention, where the rf remote unit 140 includes a processor 141, a memory 142, and a program stored in the memory 142 and capable of running on the processor 141; the processor 141, when executing the program, implements the following steps:
receiving an uplink signal sent by a terminal and second information sent by a next-stage radio remote unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage radio remote unit and the uplink signal received by the first radio remote unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
combining the uplink signal received from the terminal with the first signal to obtain a second signal;
and sending the second signal to a previous radio remote unit or a baseband processing unit.
Optionally, the first signal is a signal obtained by combining with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit; the processor 131 may further implement the following steps when executing the program:
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
determining a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and according to the maximum ratio combining weight of the radio remote unit, performing maximum ratio combining on the signal received by the radio remote unit and the first signal.
Optionally, when the processor 131 executes the program, the following steps may be further implemented:
after receiving the uplink signal sent by the terminal, the method further includes:
performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
and combining the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
The specific working process of the embodiment of the present invention is the same as that of the second embodiment of the method, and therefore, the detailed description thereof is omitted, and refer to the description of the method steps in the second embodiment.
An embodiment ninth of the present invention provides a readable storage medium, where a program is stored, and the program, when executed by a processor, implements the steps in the forwarding communication method according to any one of the first embodiment and the second embodiment. Please refer to the above description of the method steps in the corresponding embodiments.
The Base Station in the embodiment of the present invention may be a Base Transceiver Station (BTS) in Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), an evolved Node B (eNB, eNodeB) in LTE, a relay Station, an Access point, a Base Station in a future 5G network, and the like, which are not limited herein.
The terminal in the embodiments of the present invention may be a wireless terminal or a wired terminal, and the wireless terminal may be a device providing voice and/or other service data connectivity to a user, a handheld device having a wireless connection function, or other processing devices connected to a wireless modem. A wireless terminal, which may be a mobile terminal such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal, e.g., a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device, may communicate with one or more core networks via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. For example, devices such as Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs) are used. A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a Terminal (User Device or User Equipment), which are not limited herein.
The readable storage medium includes a computer readable storage medium. Computer-readable storage media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A forward communication method is applied to a radio remote unit, and is characterized by comprising the following steps:
receiving first information sent by a previous-stage radio remote unit or a baseband processing unit, wherein the first information comprises downlink data;
and copying the first information and sending the copied first information to a radio remote unit at the next stage.
2. The method according to claim 1, wherein the first information further includes downlink pre-deskew information of each cascaded remote radio unit;
after receiving the first information sent by the upper-stage radio remote unit or the baseband processing unit, the method further includes:
and performing downlink pre-correction according to the downlink pre-correction information of the radio remote unit.
3. The method of claim 1, further comprising:
receiving an uplink signal sent by a terminal and second information sent by a next-stage radio remote unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage radio remote unit and the uplink signal received by the first radio remote unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
combining the uplink signal received from the terminal with the first signal to obtain a second signal;
and sending the second signal to a previous radio remote unit or a baseband processing unit.
4. The method of claim 3, wherein the first signal is a signal combined with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
determining a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and according to the maximum ratio combining weight of the radio remote unit, performing maximum ratio combining on the signal received by the radio remote unit and the first signal.
5. The method according to claim 3 or 4, wherein after receiving the uplink signal transmitted by the terminal, the method further comprises:
performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
and combining the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
6. A forward communication method is applied to a radio remote unit, and is characterized by comprising the following steps:
receiving an uplink signal sent by a terminal and second information sent by a next-stage radio remote unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage radio remote unit and the uplink signal received by the first radio remote unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
combining the uplink signal received from the terminal with the first signal to obtain a second signal;
and sending the second signal to a previous radio remote unit or a baseband processing unit.
7. The method of claim 6, wherein the first signal is a signal combined with a maximum ratio; the second information further includes a maximum ratio combining weight of the next-stage remote radio unit and an amplitude value of an uplink signal received by the next-stage remote radio unit;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
determining a maximum ratio combining weight of the radio remote unit according to the maximum ratio combining weight of the next radio remote unit, an amplitude value of an uplink signal received by the next radio remote unit, and an amplitude value of the uplink signal received by the radio remote unit from a terminal;
and according to the maximum ratio combining weight of the radio remote unit, performing maximum ratio combining on the signal received by the radio remote unit and the first signal.
8. The method according to claim 6 or 7, wherein after receiving the uplink signal transmitted by the terminal, the method further comprises:
performing fast Fourier transform and/or frequency offset estimation processing on the uplink signal received from the terminal to obtain a frequency signal corresponding to the uplink signal;
the combining the uplink signal received from the terminal with the first signal to obtain a second signal includes:
and combining the frequency signal corresponding to the uplink signal with the first signal to obtain the second signal.
9. A remote radio unit, comprising:
the first receiving module is used for receiving first information sent by a previous-stage radio remote unit or a baseband processing unit, wherein the first information comprises downlink data;
and the copying module is used for copying the first information and sending the copied first information to a next-stage radio remote unit.
10. A remote radio unit, comprising:
the second receiving module is used for receiving an uplink signal sent by the terminal and second information sent by the next-stage remote radio unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage remote radio unit and the uplink signal received by the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
a combining module, configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
and the sending module is used for sending the second signal to the upper-stage radio remote unit or the baseband processing unit.
11. A remote radio unit, comprising: a transceiver and a processor;
the transceiver is configured to receive first information sent by a previous-stage radio remote unit or a baseband processing unit, where the first information includes downlink data;
the processor is configured to copy the first information;
the transceiver is further configured to send the copied first information to a next-stage radio remote unit.
12. A remote radio unit, comprising: a transceiver and a processor;
the transceiver is used for receiving an uplink signal sent by the terminal and second information sent by the next-stage remote radio unit, wherein the second information comprises a first signal obtained by combining the uplink signal received by the next-stage remote radio unit and the uplink signal received by the first remote radio unit; the first remote radio unit is all cascaded remote radio units behind the next remote radio unit;
the processor is configured to combine the uplink signal received from the terminal with the first signal to obtain a second signal;
the transceiver is further configured to send the second signal to the upper-stage remote radio unit or the baseband processing unit.
13. A remote radio unit comprising a memory, a processor, and a program stored on the memory and executable on the processor; characterized in that the processor, when executing the program, implements the steps in the fronthaul communication method according to any one of claims 1 to 8.
14. A readable storage medium, on which a program is stored, which, when being executed by a processor, carries out the steps of the method for fronthaul communication according to any one of claims 1 to 8.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684580A (en) * | 2012-08-31 | 2014-03-26 | 中兴通讯股份有限公司 | Radio remote unit and link fault reporting method thereof as well as wireless communication system |
| CN105490743A (en) * | 2014-09-16 | 2016-04-13 | 中国移动通信集团公司 | Link signal processing method, baseband processing device, and RRUs (radio remote units) |
| WO2016197996A1 (en) * | 2015-10-13 | 2016-12-15 | 中兴通讯股份有限公司 | Radio remote unit and operating method therefor |
| CN110247693A (en) * | 2018-03-07 | 2019-09-17 | 中兴通讯股份有限公司 | A kind of signal processing method, multilevel distributed antenna system and storage medium |
-
2020
- 2020-07-20 CN CN202010697417.3A patent/CN113965934A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103684580A (en) * | 2012-08-31 | 2014-03-26 | 中兴通讯股份有限公司 | Radio remote unit and link fault reporting method thereof as well as wireless communication system |
| CN105490743A (en) * | 2014-09-16 | 2016-04-13 | 中国移动通信集团公司 | Link signal processing method, baseband processing device, and RRUs (radio remote units) |
| WO2016197996A1 (en) * | 2015-10-13 | 2016-12-15 | 中兴通讯股份有限公司 | Radio remote unit and operating method therefor |
| CN110247693A (en) * | 2018-03-07 | 2019-09-17 | 中兴通讯股份有限公司 | A kind of signal processing method, multilevel distributed antenna system and storage medium |
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