Patent Description:
With development of communication technologies, indoor areas have become mobile service area with high incidence. Currently, indoor signal coverage is mainly implemented by using an indoor distribution system, and signals of a base station are evenly distributed to each indoor corner by using various indoor antennas.

Currently, the indoor distribution system mainly includes a new digital indoor system (digital indoor system, DIS) and a conventional analog indoor distribution system (distributed antenna system, DAS). However, as shown in <FIG>, the DIS system is an architecture divided into three levels: a baseband processing unit (base band unit, BBU), a remote radio unit hub (remote radio unit hub, RHUB), and pico remote radio units (pico remote radio unit, pRRU). One BBU may be connected to one or more RHUBs (<FIG> only shows a scenario in which the BBU is connected to one RHUB), and one RHUB may be connected to a plurality of pRRUs. An operating principle of the DIS is: The BBU sends downlink signals to the RHUB. The RHUB is connected to the pRRU through one network cable. The RHUB delivers the downlink signals to the pRRUs. The pRRUs process the downlink signals into radio frequency signals, and make the radio frequency signals access an indoor area through a transmission device such as a radio frequency feeder, a combiner/divider, or an antenna An indoor terminal sends feedback signals to the pRRUs, and the pRRUs send the feedback signals to the RHUB. The RHUB converges the feedback signals, and then sends the feedback signals to the BBU.

However, in this system, the downlink signals of the terminal device that are transmitted by the plurality of pRRUs are the same Because the pRRUs are installed at different positions, a latency occurs when the same downlink signals arrive at the terminal device through the different pRRUs. A larger latency indicates a smaller coherence bandwidth of the signals. When a signal bandwidth occupied by the terminal device is greater than the coherence bandwidth, frequency selective fading occurs. Consequently, signal distortion occurs in a frequency band occupied by the signals, downlink channel transmission quality is affected, and downlink transmission performance is reduced.

Further, <CIT>refers to a method for a base station to send data, a BBU, and an RHUB, for use in implementing space division multiplexing in a same cell to improve the performance of an entire network. The method comprises: a BBU obtains communicational connection relations between M terminals and L RRUs in a cell; the BBU generates M sets of downlink resources allocated for the M terminals, and generates allocation information of M sets of downlink data to be sent to the M terminals, wherein a terminal corresponds to a set of downlink resources and a set of downlink data, M≥<NUM>, and M is a positive integer; the BBU sends the communicational connection relations and the allocation information of the M sets of downlink data and of the M sets of downlink resources to the RHUB, so that the RHUB sends to any one of the RRUs downlink data and downlink resources corresponding to the terminal communicationally connected to the any one of the RRU. Further, <CIT> refers to a method and device for determining remote radio unit RRU. The method includes: a baseband unit BBU obtains interference strength information of a terminal, where the interference strength information includes a downlink mode of the terminal. The method further includes: if demodulation is performed by using a dedicated reference signal DRS in the downlink mode, the BBU performs resource scheduling on the terminal by using a second RRU, where the second RRU is selected by the BBU from multiple first RRUs that serve the terminal; or if demodulation is performed without using the DRS in the downlink mode, the BBU performs resource scheduling on the terminal by using a third RRU, where the third RRU is determined by the BBU according to any one of an uplink signal strength value of the terminal, a downlink quality value of the terminal, or an uplink quality value of the terminal. Further, <CIT>refers to a channel contention method and an apparatus. The method includes: contending, by an RRU, for a target channel; and sending carrier status information to a BBU, where the carrier status information is used to indicate a channel contention result of the RRU. The RRU contends for a channel and can occupy the channel after the contention is successful, and then notifies the BBU of a result of the contention by using the carrier status information.

Embodiments of this application provide a communication processing method, a BBU, an RHUB, and a second pRRU, which are used to reduce a probability of frequency selective fading of a signal and improve downlink transmission performance This problem is solved by the subject matter of the independent claims. Further implementation forms are provided in the dependent claims. Compared with the conventional technology, embodiments of this application reduce the path for sending the downlink signal of the first terminal device, so that the transmission latency is reduced, the probability of frequency selective fading of the signal is reduced, and the downlink transmission performance is improved.

The invention is covered by the subject-matter of <FIG>, <FIG>, <FIG>, <FIG>. The other figures defines subject-matter that are not covered by the claimed invention, but are useful to understand the invention.

Embodiments of this application provide a communication processing method, a BBU, an RHUB, and a second pRRU, which are used to reduce a probability of frequency selective fading of a signal and improve downlink transmission performance.

<FIG> is a schematic diagram of an architecture of a DIS system according to an embodiment of this application. The DIS system is an architecture divided into three levels: a BBU, an RHUB, and pRRUs. One BBU is connected to one or more RHUBs (<FIG> only shows a scenario in which the BBU is connected to one RHUB), and one RHUB is connected to a plurality of pRRUs. An operating principle of the DIS is described by using <FIG> below. As shown in <FIG>, the BBU sends downlink signals to the RHUB. The RHUB is connected to the pRRU through one network cable. The RHUB delivers the downlink signals to the pRRUs. The pRRUs process the downlink signals into radio frequency signals, and make the radio frequency signals access an indoor area through a transmission device such as a radio frequency feeder, a combiner/divider, or an antenna. An indoor terminal sends feedback signals to the pRRUs, and the pRRUs send the feedback signals to the RHUB. The RHUB converges the feedback signals, and then sends the feedback signals to the BBU.

However, in this system, the downlink signals that are transmitted by the plurality of pRRUs are the same. Because the pRRUs are installed at different positions, a latency occurs when the same downlink signals arrive at the terminal device through the different pRRUs. A larger latency indicates a smaller coherence bandwidth of the signals. When a signal bandwidth occupied by the terminal device is greater than the coherence bandwidth, frequency selective fading occurs. Consequently, signal distortion occurs in a frequency band occupied by the signals, downlink channel transmission quality is affected, and downlink transmission performance is reduced.

In view of this, embodiments of this application provide a communication processing method, which is used to reduce a probability of frequency selective fading of a signal and improve downlink transmission performance. The BBU receives an uplink measurement signal sent by a first terminal device, and generates an air interface measurement report based on the uplink measurement signal. The air interface measurement report includes an air interface channel quality value between the first terminal device and at least one pRRU in a cell in which the first terminal device is located. Then the BBU selects a target pRRU from the at least one pRRU based on the air interface measurement report. The target pRRU is configured to send a downlink signal to the first terminal device, and a quantity of target pRRUs is less than a quantity of the at least one pRRU. Therefore, in the technical solutions in embodiments of this application, the BBU selects the target pRRU from the at least one pRRU based on the air interface measurement report to send the downlink signal to the first terminal device. Compared with a conventional technology, embodiments of this application reduce a path for sending the downlink signal of the first terminal device, so that a transmission latency is reduced, a probability of frequency selective fading of a signal is reduced, and downlink transmission performance is improved.

It should be noted that, in embodiments of this application, the BBU may be a baseband processing unit in an access network device. The access device may include an evolved NodeB (evolved NodeB, eNB), a radio network controller (radio network controller, RNC), a NodeB (NodeB, NB), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (for example, a home evolved NodeB, or a home NodeB, HNB), a baseband unit (baseband unit, BBU), an access point (access point, AP) in a wireless fidelity (wireless fidelity, WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (transmission and reception point, TRP or transmission point, TP), or the like. Alternatively, the access network device may be a gNB or a transmission point (TRP or TP) in a <NUM> system, such as an NR system, or one antenna panel or a group of antenna panels (including a plurality of antenna panels) of a base station in the <NUM> system, or may be a network node that constitutes the gNB or the transmission point, for example, a baseband unit (BBU) or a distributed unit (DU, distributed unit).

In some deployment, the gNB may include a centralized unit (centralized unit, CU) and the DU. The gNB may further include a radio unit (radio unit, RU). The CU implements a part of functions of the gNB, and the DU implements a part of the functions of the gNB. For example, the CU implements functions of a radio resource control (radio resource control, RRC) layer and a packet data convergence protocol (packet data convergence protocol, PDCP) layer. The DU implements functions of a radio link control (radio link control, RLC) layer, a media access control (media access control, MAC) layer, and a physical (physical, PHY) layer. Information at the RRC layer finally becomes information at the PHY layer or is transformed from information at the PHY layer. Therefore, in such an architecture, it may be considered that higher layer signaling such as RRC layer signaling or PHCP layer signaling is sent by the DU or is sent by the DU and the RU. It may be understood that the network device may be a CU node, a DU node, or a device including a CU node and a DU node. In addition, the CU may be classified as a network device in an access network RAN, or the CU may be classified as a network device in a core network CN. This is not limited herein. An access network device in a wired communication system may include a passive optical network PON (Passive Optical Network), a high-speed digital subscriber line HDSL (High Speed Digital Subscriber Line), an asymmetrical digital subscriber line ADSL (Asymmetrical Digital Subscriber Line), an integrated digital subscriber loop with a V5 interface (V5 interface), and the like.

In embodiments of this application, an RHUB may be a device such as a switch or a router, and a pRRU may be an antenna device or the like. A terminal device is also referred to as user equipment (user equipment, UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT), or the like. The terminal device is a device having a wireless transceiver function, and is an entry for a moving user to interactive with a network. The terminal device can provide basic computing and storage capabilities, display a service window to a user, and receive an input operation of the user. In a <NUM> communication system, the terminal establishes a signal connection and a data connection to a RAN device by using a new radio technology, to transmit a control signal and service data to the network. The terminal device may be deployed on land, and includes an indoor device, an outdoor device, a handheld device, or a vehicle-mounted device; may be deployed on the water (for example, on a ship); or may be deployed in the air (for example, on an aircraft, a balloon, and a satellite). For example, the terminal device may include a mobile phone (or referred to as a "cellular" phone), a computer having a mobile terminal, a portable mobile apparatus, a pocket-sized mobile apparatus, a handheld mobile apparatus, a computer-built-in mobile apparatus, or an in-vehicle mobile apparatus, an intelligent wearable device, or the like. For example, the terminal device may be a device such as a personal communications service (personal communication service, PCS) phone, a cordless phone set, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, or a personal digital assistant (personal digital assistant, PDA).

In embodiments of this application, the BBU selects the target pRRU from the at least one pRRU based on the air interface measurement report, to send the downlink signal of the first terminal device to the first terminal device. There may be a plurality of specific implementations, and the implementations are described by using examples below.

Manner <NUM>: After the BBU determines the target pRRU, the BBU sends first indication information to an RHUB. The first indication information is used to indicate the RHUB not to send the downlink signal of the first terminal device to a second pRRU within first duration, and the second pRRU is a pRRU other than the target pRRU in pRRUs included in the cell in which the first terminal device is located. The manner is specifically described by using an embodiment shown in <FIG>.

Manner <NUM>: After the BBU determines the target pRRU, the BBU sends second indication information to a second pRRU. The second indication information is used to indicate the second pRRU not to send the downlink signal of the first terminal device to the first terminal device within first duration, and the second pRRU is a pRRU other than the target pRRU in pRRUs included in the cell in which the first terminal device is located. The manner is specifically described by using an embodiment shown in <FIG>.

<FIG> is a schematic diagram of an embodiment of a communication processing method according to embodiments of this application.

At least one pRRU receives an uplink measurement signal sent by a first terminal device.

With reference to <FIG>, the first terminal device may send the uplink measurement signal based on a transmit power indicated by a BBU. In this case, at least one pRRU that is in a cell in which the first terminal device is located and that is close to the first terminal device may receive the uplink measurement signal. In other words, a pRRU that is in the cell in which the first terminal device is located and that can receive the uplink measurement signal belongs to the at least one pRRU.

The uplink measurement signal sent by the first terminal device is an analog electrical signal. It should be noted that the cell in which the first terminal device is located is a physical cell, for example, a baseband processing resource, and <NUM> air interface bandwidth occupied by the physical cell. The physical cell may include a plurality of pRRUs, and the plurality of pRRUs are connected to the BBU by using one or more RHUBs.

The at least one pRRU sends the uplink measurement signal to the RHUB.

Because a form of the uplink measurement signal sent by the first terminal device is an analog electrical signal form, the at least one pRRU may convert the analog electrical signal into a digital electrical signal, and send the digital electrical signal to the RHUB.

The RHUB sends the uplink measurement signal to the BBU.

After receiving the digital electrical signal, the RHUB may forward the digital electrical signal to the BBU.

The BBU generates an air interface measurement report based on the uplink measurement signal.

The air interface measurement report includes an air interface channel quality value between the first terminal device and at least one pRRU in the cell in which the first terminal device is located.

Specifically, the BBU may determine, based on a power of the uplink measurement signal, the air interface channel quality value between the first terminal device and the at least one pRRU in the cell in which the first terminal device is located. The air interface channel quality value may be a signal-to-noise ratio.

The BBU selects a target pRRU from the at least one pRRU based on the air interface measurement report.

The target pRRU is configured to send a downlink signal of the first terminal device to the first terminal device, and a quantity of target pRRUs is less than a quantity of the at least one pRRU.

The BBU may select the target pRRU based on the air interface channel quality value that is between the first terminal device and the at least one pRRU and that is carried in the air interface measurement report. For a specific implementation process, refer to <FIG> is a schematic diagram of another embodiment of embodiments of this application.

205a: The BBU determines whether an air interface channel quality value between the first terminal device and a first pRRU is greater than a preset threshold. If yes, perform step 205b; or if no, perform step 205c.

205b: The BBU uses the first pRRU as the target pRRU.

205c: The BBU determines whether the first pRRU is configured to send a downlink signal of a second terminal device to the second terminal device. If yes, perform step 205d; or if no, perform step 205e.

When the air interface channel quality value between the first terminal device and the first pRRU is not greater than the preset threshold, the BBU determines whether the first pRRU is selected to send the downlink signal of the second terminal device to the second terminal device. If yes, perform step 205d; or if no, perform step 205e. The second terminal device is any terminal device in the cell, and the second terminal device is close to the first pRRU at a location, that is, air interface channel quality between the second terminal device and the first pRRU is good. In this case, the BBU may select the first pRRU to send the downlink signal of the second terminal device to the second terminal device.

205d: Use the first pRRU as the target pRRU.

If the first pRRU is configured to send the downlink signal of the second terminal device to the second terminal device, the first pRRU is used as the target pRRU.

If no, exclude the first pRRU. That is, in this case, the target pRRU does not include the first pRRU.

The BBU sends first indication information to the RHUB.

The first indication information is used to indicate the RHUB not to send the downlink signal of the first terminal device to a second pRRU within first duration, and the second pRRU is a pRRU other than the target pRRU in pRRUs included in the cell in which the first terminal device is located.

This means that the RHUB is indicated to send the downlink signal of the first terminal device to the target pRRU within the first duration. The first indication information may carry a corresponding indication field to indicate the RHUB to send the downlink signal of the first terminal device to the target pRRU within the first duration. The first duration may be set based on a movement status (which is learned from the air interface measurement report sent by the first terminal device) of the first terminal device. In addition, in this embodiment of this application, the solution of this embodiment of this application may be implemented within interval duration. Actually, the interval duration may be set based on the movement status of the first terminal device.

For example, as shown in <FIG>, second pRRUs include a pRRU <NUM>, a pRRU <NUM>, and a pRRU <NUM>. For example, the BBU indicates the RHUB not to send the downlink signal of the first terminal device to the pRRU <NUM>, the pRRU <NUM>, and the pRRU <NUM> within <NUM>, and the BBU sends the downlink signal of the first terminal device to the first terminal device on a pRRU <NUM>, a pRRU <NUM>, and a pRRU <NUM> to a pRRU n within the first duration. Specifically, as shown in <FIG>, no signal is sent on communication links that have cross signs between the RHUB and the pRRUs. Optionally, the BBU may also send operations corresponding to the following n <NUM> to the RHUB by using <NUM> as a time periodicity. The following provides a description with reference to Table <NUM>.

For example, as shown in Table <NUM>, the BBU determines, based on the air interface measurement report of the first terminal device, use requirements of each pRRU in each time period shown in Table <NUM>, where "<NUM>" indicates that transmit selection on a corresponding pRRU is disabled, and "<NUM>" indicates that the transmit selection on a corresponding pRRU is enabled. Specifically, duration shown in Table <NUM> may be determined with reference to an actual situation. For example, when a user moves slowly, the user may send the downlink signal of the first terminal device to the first terminal device in a short time by using a same pRRU.

In this embodiment of this application, the BBU receives the uplink measurement signal sent by the first terminal device. Then the BBU generates the air interface measurement report based on the uplink measurement signal. The air interface measurement report includes the air interface channel quality value between the first terminal device and the at least one pRRU in the cell in which the first terminal device is located. Then the BBU selects the target pRRU from the at least one pRRU based on the air interface measurement report. The target pRRU is configured to send the downlink signal to the first terminal device, and the quantity of target pRRUs is less than the quantity of the at least one pRRU. The BBU sends the first indication information to the second pRRU. The first indication information is used to indicate the RHUB not to send the downlink signal of the first terminal device to the second pRRU within the first duration. The second pRRU is the pRRU other than the target pRRU in the pRRUs included in the cell in which the first terminal device is located. This means that the RHUB is indicated to send the downlink signal of the first terminal device to the target pRRU within the first duration. Therefore, in the technical solution in this embodiment of this application, the BBU selects the target pRRU from the at least one pRRU based on the air interface measurement report to send the downlink signal to the first terminal device. Compared with a conventional technology, this embodiment of this application reduces a path for sending the downlink signal of the first terminal device, so that a transmission latency is reduced, a probability of frequency selective fading of a signal is reduced, and downlink transmission performance is improved.

<FIG> is a schematic diagram of another embodiment of a communication processing method according to embodiments of this application.

The at least one pRRU sends the uplink measurement signal to an RHUB.

The RHUB sends the uplink measurement signal to a BBU.

Step <NUM> to step <NUM> are similar to step <NUM> to step <NUM> in the embodiment shown in <FIG>. For details, refer to related descriptions in step <NUM> to step <NUM> in the embodiment shown in <FIG>. The details are not described herein again.

The BBU sends second indication information to a second pRRU.

The second indication information is used to indicate the second pRRU not to send a downlink signal of the first terminal device to the first terminal device within first duration, and the second pRRU is a pRRU other than the target pRRU in pRRUs included in a cell in which the first terminal device is located. The first duration may be set based on a movement status (which is learned from the air interface measurement report sent by the first terminal device) of the first terminal device. In addition, in this embodiment of this application, the solution of this embodiment of this application may be implemented within interval duration. Actually, the interval duration may be set based on the movement status of the first terminal device.

The following provides a description with reference to Table <NUM>. Table <NUM> shows signal processing indications received by a pRRU <NUM> within <NUM>. Details are as follows:.

It can be learned from Table <NUM> that the pRRU <NUM> skips sending the downlink signal of the first terminal device to the first terminal device within <NUM>, and each TTI may be <NUM>.

Similarly, a pRRU <NUM> and a pRRU <NUM> also receive the indications shown in Table <NUM>, and skip sending the downlink signal of the first terminal device within <NUM>. Specifically, with reference to <FIG>, no signal is sent on communication links that have cross signs between the pRRUs and the first terminal device.

The BBU sends third indication information to the target pRRU.

The third indication information is used to indicate the target pRRU to send the downlink signal of the first terminal device to the first terminal device within the first duration.

It should be noted that step <NUM> is optional. The target pRRU may alternatively need to send the downlink signal of the first terminal device within the first duration by default when no indication information sent by the BBU is received. Alternatively, the target pRRU may determine, based on indication information of the BBU, to send the downlink signal of the first terminal device within the first duration. Specifically, corresponding processing logic may be set based on an actual situation. This is not limited in this application. For example, the BBU may send Table <NUM> to a pRRU <NUM>. Table <NUM> is specifically as follows:.

It can be learned from Table <NUM> that the pRRU <NUM> sends the downlink signal of the first terminal device to the first terminal device within <NUM>.

With reference to a specific example in <FIG>, the following describes the method in this embodiment of this application. When the first terminal device performs a downlink interface through radio frequency combination of three pRRUs, a downlink peak rate of the first terminal device reaches <NUM> Gbps to <NUM> Gbps. After the pRRU <NUM> and the pRRU <NUM> are blocked, a peak rate of the first terminal device may reach <NUM> Gbps to <NUM> Gbps in a same environment, and downlink performance is improved by at least <NUM>%.

In this embodiment of this application, the BBU receives the uplink measurement signal sent by the first terminal device. Then the BBU generates the air interface measurement report based on the uplink measurement signal. The air interface measurement report includes an air interface channel quality value between the first terminal device and at least one pRRU in the cell in which the first terminal device is located. Then the BBU selects the target pRRU from the at least one pRRU based on the air interface measurement report. The target pRRU is configured to send the downlink signal to the first terminal device, and a quantity of target pRRUs is less than a quantity of the at least one pRRU. The BBU sends the second indication information to the second pRRU. The second indication information is used to indicate the second pRRU not to send the downlink signal of the first terminal device to the first terminal device within the first duration. The second pRRU is the pRRU other than the target pRRU in the pRRUs included in the cell in which the first terminal device is located. Therefore, in the technical solution in this embodiment of this application, the BBU selects the target pRRU from the at least one pRRU based on the air interface measurement report to send the downlink signal to the first terminal device. Compared with a conventional technology, this embodiment of this application reduces a path for sending the downlink signal of the first terminal device, so that a transmission latency is reduced, a probability of frequency selective fading of a signal is reduced, and downlink transmission performance is improved.

The following describes a similar problem in a DAS system. <FIG> is a schematic diagram of an architecture of a DAS system. A donor signal source of the DAS system may be a macro base station, a microcell, a distributed base station, or various relay access repeaters. Generally, a signal output to the DAS signal distributed system is an analog radio frequency signal. A passive or active DAS component performs signal split transmission, and signals are evenly allocated through a feeder as much as possible to each antenna dispersedly installed in each area, to implement even distribution of indoor signals. Therefore, the DAS system also has the similar technical problem. A control module for a downlink signal path may be added between a cable/optical fiber transmission line and an active/passive antenna, and then the donor signal source (for example, a base station or a microcell) controls the control module by using the method in embodiments of this application. In this way, a path for sending a downlink signal of a first terminal device is reduced in the DAS system, so that a transmission latency is reduced, a probability of frequency selective fading of a signal is reduced, and downlink transmission performance is improved.

It should be noted that, in the foregoing method embodiments, only the target pRRU is selected to send the downlink signal of the first terminal device, to reduce a path for sending the downlink signal of the first terminal device in a DIS system or the DAS system, to improve the downlink transmission performance. In an actual application, this may also be implemented by reducing or increasing a downlink transmit power between the first terminal device and the pRRU, which belongs to a similar idea to a manner of enabling the pRRU or disabling the pRRU in the foregoing method embodiment. In other words, a solution of controlling the downlink transmit power between the first terminal device and the pRRU also falls within the protection scope of embodiments of this application.

The following describes an access network device according to embodiments of this application. <FIG> is an embodiment of the access network device according to embodiments of this application. The access network device includes a BBU. The BBU may be configured to perform the steps performed by the BBU in the foregoing method embodiment. Refer to related descriptions in the foregoing method embodiment.

The BBU includes a transceiver module <NUM> and a processing module <NUM>.

The transceiver module <NUM> is configured to receive an uplink measurement signal sent by a first terminal device; and
the processing module <NUM> is configured to generate an air interface measurement report based on the uplink measurement signal, where the air interface measurement report includes an air interface channel quality value between the first terminal device and at least one pRRU in a cell in which the first terminal device is located; and select a target pRRU from the at least one pRRU based on the air interface measurement report, where a quantity of target pRRUs is less than a quantity of the at least one pRRU, and the target pRRU is configured to send a downlink signal of the first terminal device to the first terminal device.

In a possible implementation, the at least one pRRU includes a first pRRU. The processing module <NUM> is specifically configured to:.

In another possible implementation, the transceiver module <NUM> is further configured to:
send first indication information to an RHUB, where the first indication information is used to indicate the RHUB not to send the downlink signal of the first terminal device to a second pRRU within first duration, and the second pRRU is a pRRU other than the target pRRU in pRRUs included in the cell in which the first terminal device is located.

In another possible implementation, the first indication information is further used to indicate the RHUB to send the downlink signal of the first terminal device to the target pRRU within the first duration.

In another possible implementation, the transceiver module <NUM> is further configured to:
send second indication information to a second pRRU, where the second indication information is used to indicate the second pRRU not to send the downlink signal of the first terminal device to the first terminal device within first duration, and the second pRRU is a pRRU other than the target pRRU in pRRUs included in the cell in which the first terminal device is located.

In another possible implementation, the transceiver module <NUM> is further configured to:
send third indication information to the target pRRU, where the third indication information is used to indicate the target pRRU to send the downlink signal of the first terminal device to the first terminal device within the first duration.

In this embodiment of this application, the transceiver module <NUM> receives the uplink measurement report sent by the first terminal device. The processing module <NUM> is configured to generate the air interface measurement report based on the uplink measurement report. The air interface measurement report includes the air interface channel quality value between the first terminal device and the at least one pRRU in the cell in which the first terminal device is located. Then the processing module <NUM> selects the target pRRU from the at least one pRRU based on the air interface measurement report. The target pRRU is configured to send the downlink signal of the first terminal device to the first terminal device, and the quantity of the target pRRUs is less than the quantity of the at least one pRRU. Therefore, in the technical solution in this embodiment of this application, the BBU selects the target pRRU from the at least one pRRU based on the air interface measurement report to send the downlink signal to the first terminal device. Compared with a conventional technology, this embodiment of this application reduces a path for sending the downlink signal of the first terminal device, so that a transmission latency is reduced, a probability of frequency selective fading of a signal is reduced, and downlink transmission performance is improved.

The following describes an RHUB according to embodiments of this application. <FIG> is an embodiment of the RHUB according to embodiments of this application. The RHUB may be configured to perform the steps performed by the RHUB in the foregoing method embodiment. Refer to related descriptions in the foregoing method embodiment.

The RHUB includes a transceiver module <NUM> and a processing module <NUM>.

The transceiver module <NUM> is configured to receive first indication information sent by a BBU; and
the processing module <NUM> is configured to skip sending, based on the first indication information, a downlink signal of a first terminal device to a second pRRU within first duration, and send the downlink signal of the first terminal device to a target pRRU within the first duration. The second pRRU is a pRRU other than the target pRRU in pRRUs included in a cell in which the first terminal device is located.

The following describes a second pRRU according to embodiments of this application. <FIG> is an embodiment of the second pRRU according to embodiments of this application. The second pRRU may be configured to perform the steps performed by the second pRRU in the foregoing method embodiment. Refer to related descriptions in the foregoing method embodiment.

The second pRRU includes a transceiver module <NUM> and a processing module <NUM>.

The transceiver module <NUM> is configured to receive second indication information sent by a BBU; and
the processing module <NUM> is configured to skip sending, based on the second indication information, a downlink signal of a first terminal device to the first terminal device within first duration.

This application further provides an access network device <NUM>. <FIG> is an embodiment of the access network device according to embodiments of this application. The access network device includes a BBU. The BBU may be configured to perform the steps performed by the BBU in the foregoing method embodiment. Refer to related descriptions in the foregoing method embodiment.

The access network device <NUM> includes a processor <NUM>, a memory <NUM>, an input/output device <NUM>, and a bus <NUM>.

In a possible implementation, the processor <NUM>, the memory <NUM>, and the input/output device <NUM> are connected to the bus <NUM> separately, and the memory stores computer instructions.

The processing module <NUM> in the foregoing embodiment shown in <FIG> may be specifically the processor <NUM> in this embodiment. Therefore, a specific implementation of the processor <NUM> is not described again. The transceiver module <NUM> in the foregoing embodiment shown in <FIG> may be specifically the input/output device <NUM> in this embodiment. Therefore, a specific implementation of the input/output device <NUM> is not described again.

This application further provides an RHUB <NUM>. <FIG> is an embodiment of the RHUB according to embodiments of this application. The RHUB may be configured to perform the steps performed by the RHUB in the foregoing method embodiment. Refer to related descriptions in the foregoing method embodiment.

The RHUB <NUM> includes a processor <NUM>, a memory <NUM>, an input/output device <NUM>, and a bus <NUM>.

This application further provides a second pRRU <NUM>. <FIG> is an embodiment of the second pRRU according to embodiments of this application. The second pRRU may be configured to perform the steps performed by the second pRRU in the foregoing method embodiment. Refer to related descriptions in the foregoing method embodiment.

The second pRRU <NUM> includes a processor <NUM>, a memory <NUM>, an input/output device <NUM>, and a bus <NUM>.

Refer to <FIG>. An embodiment of this application further provides a communication processing system. The communication processing system may include a BBU, an RHUB, a second pRRU, and a target pRRU. The BBU may be configured to perform all or some of the steps performed by the BBU in embodiments shown in <FIG>, <FIG>, and <FIG>. The RHUB is configured to perform all or some of the steps performed by the RHUB in embodiments shown in <FIG> and <FIG>. The second pRRU is configured to perform all or some of the steps performed by the second pRRU in embodiments shown in <FIG> and <FIG>. The target pRRU is configured to perform all or some of the steps performed by the target pRRU in the embodiment shown in <FIG>.

An embodiment of this application provides a chip system. The chip system includes a processor and an input/output port. The processor is configured to implement the processing function in embodiments shown in <FIG>, <FIG>, and <FIG>. The input/output port is configured to implement the sending and receiving functions in embodiments shown in the <FIG>, <FIG>, and <FIG>.

In a possible design, the chip system further includes a memory. The memory is configured to store program instructions and data that are used to implement the functions in embodiments shown in the <FIG>, <FIG>, and <FIG>.

The chip system may include a chip, or may include a chip and another discrete component.

According to the methods provided in embodiments of this application, this application further provides a computer program product. The computer program product includes computer program code. When the computer program code is run on a computer, the computer is enabled to perform the methods in embodiments shown in <FIG>, <FIG>, and <FIG>.

According to the methods provided in embodiments of this application, this application further provides a computer-readable medium. The computer-readable medium stores program code. When the program code is run on a computer, the computer is enabled to perform the methods in embodiments shown in <FIG>, <FIG>, and <FIG>.

It may be clearly understood by persons skilled in the art that, for the purpose of convenient and brief description, for a detailed working process of the system, the apparatus, and the unit, refer to a corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided in this application, it should be understood that the disclosed system, the apparatus, and the method may be implemented in other manners. For example, the foregoing apparatus embodiment is merely an example. For example, division into units is merely logical function division and may be other division in actual implementation. The indirect couplings or communication connections between the apparatuses or units may be implemented in an electrical form, a mechanical form, or another form.

When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of this application essentially, or the part contributing to the prior art, or all or some of the technical solutions may be implemented in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, a network device, or the like) to perform all or some of the steps of the methods in embodiments of this application. The storage medium includes any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or a compact disc.

Claim 1:
A communication processing method performed by a baseband processing unit, BBU,
∘ wherein the BBU is connected to a remote radio unit hub, RHUB, and the RHUB is connected to a plurality of pico remote radio units, pRRUs, in a cell in which a first terminal device is located,
∘ wherein the plurality of pRRUs are pRRUs for sending downlink signals for the first terminal device to the first terminal device, for receiving feedback signals from the first terminal device and for sending said feedback signals to the RHUB , and
o wherein the BBU sends the downlink signals to the RHUB for sending said downlink signals to any of the pRRUs among the plurality of pRRUs, and receives said feedback signals from the RHUB,
wherein the method comprises the steps of:
• receiving (step <NUM>) , via at least one pRRU of the plurality of pRRUs, from the RHUB, an uplink measurement signal from the first terminal device;
• generating (step <NUM>) an air interface measurement report based on the uplink measurement signal, wherein the air interface measurement report comprises an air interface channel quality value between the first terminal device and the at least one pRRU of the plurality of pRRUs;
• selecting (step <NUM>) , from the at least one pRRU of the plurality of pRRUs based on the air interface measurement report, a target pRRU for sending a downlink signal of the first terminal device to the first terminal device, the method being characterized in that it further comprises:
• sending (step <NUM>) first indication information to the RHUB, wherein the first indication information is used to indicate to the RHUB not to send the downlink signal of the first terminal device to a second pRRU among the plurality of pRRUs within a first duration and is used to indicate to the RHUB to send the downlink signal of the first terminal device to the target pRRU within the first duration, wherein the second pRRU is a pRRU other than the target pRRU.