CN108966246B - Signal processing method and base station - Google Patents

Signal processing method and base station Download PDF

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CN108966246B
CN108966246B CN201710373199.6A CN201710373199A CN108966246B CN 108966246 B CN108966246 B CN 108966246B CN 201710373199 A CN201710373199 A CN 201710373199A CN 108966246 B CN108966246 B CN 108966246B
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base station
signal
weighting
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target terminal
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CN108966246A (en
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刘庆伟
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Shanghai Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
    • H04B7/0495—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity using overlapping sectors in the same base station to implement MIMO for antennas

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Abstract

The embodiment of the application discloses a signal processing method and a base station, which are used for effectively improving the space multiplexing rate of the existing 2T antenna feeder system. When an overlapping coverage area exists between the coverage area of a first beam and the coverage area of a second beam, a base station determines that the overlapping coverage area is a joint scheduling area, and the first beam and the second beam are respectively beams formed by a 2T antenna feed system of the base station; the base station determines whether a target terminal is located in the joint scheduling region; and if so, the base station sends a downlink signal to the target terminal according to a 4-antenna sending flow.

Description

Signal processing method and base station
Technical Field
The present application relates to the field of communications, and in particular, to a signal processing method and a base station.
Background
The antenna feed system is a system formed by radiating electromagnetic waves to the surrounding space by using an antenna and mainly comprises an antenna system and a feeder system. The antenna system comprises a plurality of antennas, and the basic function of the antenna feed system is to radiate and receive electromagnetic waves. In the field of mobile communications, an antenna feeder system generally refers to an antenna feeder system of a base station, wherein one of the main functions is to receive and transmit an uplink signal transmitted from a mobile station, and establish an uplink from the mobile station to the base station; another main function is to transmit and transmit radio frequency signals from a signal transmitter, and establish a downlink from a base station to a mobile station, which is not described in detail herein.
For a Long Term Evolution (LTE) communication system, in an early stage of commercial LTE communication system, an operator uses a large number of 2T (transmit) antenna feed systems for a base station, a 2T antenna feed system refers to an antenna feed system including two antenna transmission numbers, the LTE communication system gradually evolves to 4.5G or 5G along with large-scale commercial use of the LTE system, and according to the existing LTE protocol, the 2T antenna feed system can only achieve spatial multiplexing of 2 layers of Rank Indication (RI), at maximum, however, the LTE communication system has higher requirements for a coverage range and a peak flow rate, and the spatial multiplexing rate of the 2T antenna feed system in the prior art is lower.
Disclosure of Invention
The embodiment of the application provides a signal processing method and a base station, which are used for effectively improving the space multiplexing rate of the existing 2T antenna feeder system.
In order to solve the above problem, an embodiment of the present application provides the following technical solutions:
in a first aspect, an embodiment of the present application provides a signal processing method, where when an overlapping coverage area exists between a coverage area of a first beam and a coverage area of a second beam of a 2T antenna feed system of a base station, the base station determines that the overlapping coverage area is a joint scheduling area, the base station determines whether a terminal is located in the joint scheduling area, and if the base station determines that the terminal is located in the joint scheduling area, the base station sends a downlink signal to a target terminal according to a 4-antenna sending flow.
Therefore, in the application, a 2T antenna feed system of an original base station is utilized, and downlink signals are sent to terminals in a joint scheduling area according to a 4-antenna sending process in an overlapping coverage area of two different beams of the original 2T antenna feed system, so that 4-stream multiplexing gain is obtained; the technical scheme can achieve the aim that under the condition that a 2T antenna feed system of a base station is not replaced, a combined scheduling area is a 4T cell, so that the peak flow of 4x4 multiple input multiple output (English: multiple input multiple output, abbreviation: MIMO) can be realized, and the space multiplexing rate is effectively improved.
In one possible implementation, when there is an overlapping coverage area of the coverage of the first beam and the coverage of the second beam, the method further comprises: the base station determines that the areas except the overlapping coverage area in the coverage areas of the first beam and the second beam are independent scheduling areas; if the target terminal is determined to be located in the independent scheduling area, the base station performs weighting processing on the downlink signal; and the base station sends the weighted signal to the target terminal. As can be seen from this, for the independent scheduling areas of the coverage areas of the first beam and the second beam, the base station performs weighting processing before downlink signals are sent, so that only the terminals in the independent scheduling areas receive the signals sent by the base station in the independent scheduling areas.
In one possible implementation, the downlink signal includes a target downlink physical channel signal, the target downlink physical channel signal does not include a synchronization channel signal, and the weighting processing performed by the base station on the downlink signal includes: a base station acquires a pre-coded signal of a target downlink physical channel signal; and the base station performs weighting processing on the pre-coded signals. Therefore, in the embodiment of the present application, for a target downlink physical channel signal, that is, a physical downlink signal that does not include a synchronization channel signal, a pre-coded signal of the target downlink physical channel signal needs to be obtained first, and then the pre-coded signal needs to be weighted, so that the peak transmission rate can be effectively increased by using a pre-coding technique.
In one possible implementation, the target downlink physical channel signal does not include a physical downlink shared channel signal; the base station acquires a pre-coded signal of a target downlink physical channel signal, and the method comprises the following steps: and the base station acquires a pre-coded signal of the target downlink physical channel signal according to the 4-antenna transmission flow. That is, in the embodiment of the present application, for a target downlink physical channel signal that does not include a physical downlink shared channel signal, a base station directly obtains a corresponding precoded signal according to a 4-antenna transmission flow by using a precoding technique.
In one possible implementation, the weighting processing of the precoded signals by the base station includes:
the base station performs weighting processing on the pre-coded signals according to the following formula:
Figure BDA0001303323570000021
wherein,
Figure BDA0001303323570000022
for precoded signals acquired according to a 4-antenna transmission scheme, WCRSIn order to be a weighting matrix, the weighting matrix,
Figure BDA0001303323570000023
is the weighted signal. That is, in the present implementation, a specific weighting processing manner is proposed, which improves the implementability of the scheme.
In one possible implementation, the target downlink physical channel signal includes a physical downlink shared channel signal, and the obtaining, by the base station, a precoded signal of the target downlink physical channel signal includes: a base station acquires physical downlink shared channel signals of a first wave beam and a second wave beam; and the base station generates a pre-coded signal according to the physical downlink shared channel signals of the first wave beam and the second wave beam.
In one possible implementation, the generating, by the base station, a precoded signal according to a physical downlink shared channel signal of a first beam and a second beam includes: the base station generates a precoded signal according to the following formula:
Figure BDA0001303323570000024
wherein, the w0And s0A precoding matrix and a physical downlink shared channel signal, w, of the first beam, respectively1And s1The precoding matrix and the physical downlink shared channel signal of the second wave beam are respectively; the above-mentioned
Figure BDA0001303323570000031
The precoded signal is obtained.
In one possible implementation, after obtaining the precoded signal according to the first beam and the second beam, the base station performs weighting processing on the precoded signal, including: the base station performs weighting processing on the pre-coded signals according to the following formula:
Figure BDA0001303323570000032
wherein,
Figure BDA0001303323570000033
for precoding signals, WCRSIn order to be a weighting matrix, the weighting matrix,
Figure BDA0001303323570000034
is the weighted signal. In this implementation, a weighting method for a precoding signal of a target downlink channel in an independent scheduling region is provided to ensure that downlink physical channel estimation is consistent, so that a synchronization channel signal is transmitted in a left beam or a right beam, a problem of channel mismatch is avoided, and the feasibility of the scheme provided by the embodiment of the present application in the independent scheduling region is improved.
In one possible implementation, the base station determining whether the target terminal is located in the joint scheduling region includes: a base station receives an uplink reference signal sent by a target terminal; the base station determines the reference signal receiving power of the first wave beam and the second wave beam according to the uplink reference signal; and determining whether the target terminal equipment is located in the joint scheduling area according to the reference signal received power. Therefore, by means of the method and the device for determining the target terminal, whether the target terminal is located in the joint scheduling area or not is provided.
In one possible implementation, the base station determining whether the target terminal is located in the joint scheduling region according to the reference signal received power of the first beam and the second beam includes: and the base station determines whether the absolute value of the difference value of the reference signal receiving powers of the first beam and the second beam is smaller than a preset value, and if the absolute value of the difference value is greater than or equal to the preset value, the base station determines that the target terminal is positioned in the joint scheduling area. In the application, a specific implementation manner that the base station determines whether the target terminal is located in the joint scheduling region according to the absolute value of the difference value of the reference signal received power is provided, so that the implementability of the scheme is improved.
In a possible implementation, if it is determined that the absolute value of the difference is greater than or equal to the preset value, the base station determines that the target terminal is located in the independent scheduling area.
In a second aspect, an embodiment of the present application provides a base station, including: a first determining module, configured to determine, when an overlapping coverage area exists between a coverage area of a first beam and a coverage area of a second beam, that the overlapping coverage area is a joint scheduling area, where the first beam and the second beam are beams formed by a 2T antenna feed system of a base station, respectively; a second determining module, configured to determine whether a terminal is located in the joint scheduling region; and the sending module is used for sending downlink signals to the terminal according to a 4-antenna sending process if the second determining module determines that the terminal is located in the joint scheduling area.
In the third aspect of the present application, the constituent modules of the base station may further perform the steps described in the foregoing first aspect and various possible implementations, for details, see the foregoing description of the first aspect and various possible implementations, and details are not repeated here.
In a fourth aspect, an embodiment of the present application further provides another base station, where the base station has a function of implementing the behavior described in the steps in the foregoing method, and the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions. In a possible design, an embodiment of the present application further provides a base station, where the base station includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method in the foregoing first aspect when executing the computer program.
In a fifth aspect, the present application provides a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to perform the method of the above-described aspects.
To sum up, the embodiment of the present application provides a signal processing method, and in the method provided in the embodiment of the present application, when there is an overlapping coverage area between a coverage area of a first beam and a coverage area of a second beam of a 2T antenna feed system of a base station, the base station determines that the overlapping coverage area is a joint scheduling area, the base station determines whether a terminal is located in the joint scheduling area, and if the base station determines that the terminal is located in the joint scheduling area, the base station sends a downlink signal to the target terminal according to a 4-antenna sending flow. Therefore, in the application, a 2T antenna feed system of an original base station is utilized, and downlink signals are sent to terminals in a joint scheduling area according to a 4-antenna sending process in an overlapping coverage area of two different beams of the original 2T antenna feed system, so that 4-stream multiplexing gain is obtained; the method realizes the mode of double-splicing the original 2T cell into the 4T cell, and the technical scheme can ensure that the joint scheduling area is the 4T cell under the condition of not replacing the 2T antenna feeder system of the base station, thereby realizing the peak flow of 4x4MIMO and effectively improving the space multiplexing rate.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings according to these drawings.
FIG. 1 is a system framework diagram according to an embodiment of the present application;
fig. 2 is a schematic flowchart illustrating an embodiment of a signal processing method according to an embodiment of the present application;
fig. 3 is a schematic flowchart illustrating a signal processing method according to another embodiment of the present application;
fig. 4 is a schematic flowchart illustrating a signal processing method according to another embodiment of the present application;
fig. 5 is a schematic scheduling diagram of a signal processing method according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an embodiment of a base station according to the present application;
fig. 7 is a schematic structural diagram of another embodiment of a base station according to the present application;
fig. 8 is a schematic structural diagram of another embodiment of a base station according to the present application;
fig. 9 is a schematic structural diagram of another embodiment of a base station according to an embodiment of the present application.
Detailed Description
The embodiment of the application provides a signal processing method and a base station, which are used for effectively improving the space multiplexing rate of the existing 2T antenna feeder system.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It is to be understood that the described embodiments are merely exemplary of some, and not all, of the present application. All other embodiments that can be derived from the embodiments given herein by a person of ordinary skill in the art are intended to be within the scope of the present disclosure.
It should be noted that the terms "first," "second," "third," "fourth," and the like (if any) in the description and claims of this application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The following describes examples of the present application.
The embodiments of the present application are applicable to various communication system scenarios including a 2T antenna feed system, for example, a global system for mobile communication (GSM), a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a general mobile telecommunications system (FDD), a time division long term evolution (UMTS), a TD-LTE, a long term frequency division evolution (frequency division telecommunications), a future LTE system, the details are not limited herein.
First, a system framework applied to the signal processing method provided in the embodiment of the present application is described, please refer to fig. 1, where fig. 1 is a schematic diagram of a system architecture applied to the signal processing method in the embodiment of the present application, and the system architecture includes a terminal and a base station, where the base station may receive or transmit data/signals through a 2T antenna feeder system of the base station, so as to implement transceiving of data or signaling between the base station and the terminal. The terminal may be referred to as a user equipment, an access terminal, a User Equipment (UE), a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, or other devices or apparatuses, and is not limited herein. The base station refers to a network device that communicates with a terminal, and the base station may be a Base Transceiver Station (BTS) in a GSM system, a base station (NB) in a WCDMA system, an evolved node B (eNB or eNodeB) in an LTE system, or a base station device in a communication system that includes a 2T antenna feed system in the future, which is not limited herein. Referring to fig. 1 again, it should be understood that, in a 2T antenna feed system of a base station, the 2T antenna feed system of the base station may form beams to different areas, where a beam of the 2T antenna feed system represents a coverage area of a signal radiated by the 2T antenna feed system, and the base station may use the beam to radiate a terminal under the coverage area for communication. Then, in this way, in the overlapping coverage area, i.e., the joint scheduling area, the effect of the 4T antenna feeder system can be achieved. Sending downlink signals to terminals in a joint scheduling area according to a 4-antenna sending process in an overlapping coverage area of two different beams of an original 2T antenna feed system by using a 2T antenna feed system of an original base station to obtain 4-stream multiplexing gain; the method realizes the mode of double-splicing the original 2T cell into the 4T cell, and the technical scheme can ensure that the joint scheduling area is the 4T cell under the condition of not replacing the 2T antenna feeder system of the base station, thereby realizing the peak flow of 4x4MIMO and effectively improving the space multiplexing rate.
It should be noted that, in the embodiment of the present application, by changing a beam direction or a coverage range of a signal transmitted by an antenna of a 2T antenna feed system of each base station in a communication system, two beams transmitted by the 2T antenna feed system of the base station originally have an overlapping coverage area, for example, by changing a down tilt angle and/or a direction angle of the antenna in the 2T antenna feed system, two different beams transmitted by the antenna of the 2T antenna feed system have an overlapping coverage area, or changing an antenna gain of the two beams of the 2T antenna feed system of the base station, and the like, an effect that the two different beams of the 2T antenna feed system have an overlapping coverage area is achieved, which is not limited herein.
The following provides a detailed description of examples of the present application.
In some examples of the present application, as shown in fig. 2, an embodiment of a signal processing method according to an embodiment of the present application includes:
101. when the coverage area of the first beam and the coverage area of the second beam have an overlapping coverage area, the base station determines the overlapping coverage area as a joint scheduling area.
Referring to fig. 1, a 2T antenna feed system of a base station forms a first beam and a second beam, where the first beam and the second beam respectively represent two different signal coverage areas radiated by the 2T antenna feed system of the base station, and it should be noted that the coverage area of the first beam and the coverage area of the second beam may have different coverage areas or the same coverage area size in a specific scene, and are not limited herein. In the embodiment of the application, when the coverage area of the first beam and the coverage area of the second beam of the 2T antenna feed system have an overlapping coverage area, the base station determines the overlapping coverage area as a joint scheduling area.
In this embodiment of the present application, when there is an overlapping coverage area between the coverage area of the first beam and the coverage area of the second beam, this embodiment of the present application further includes: and the base station determines the areas except the overlapping coverage area in the coverage areas of the first beam and the second beam as independent scheduling areas. As shown in fig. 1, the non-overlapping coverage areas in the coverage areas of the first beam and the second beam are independent scheduling areas.
102. The base station determines whether a target terminal is located in the joint scheduling area, if so, step 103 is executed; if not, go to step 104.
In some embodiments of the present application, the determining, by the base station, whether a target terminal is located in the joint scheduling area includes:
the base station receives an uplink reference signal sent by the target terminal;
the base station determines the reference signal receiving power of the first wave beam and the second wave beam according to the uplink reference signal;
and the base station determines whether the terminal is positioned in the joint scheduling region according to the reference signal receiving power.
For example, the uplink reference signal sent by the target terminal to the base station may be a channel Sounding Reference Signal (SRS), a demodulation reference signal (DMRS), and the like, which is not limited herein. In this embodiment of the present application, after the base station receives the uplink reference signal sent by the terminal, the base station may determine Reference Signal Receiving Power (RSRP) of the first beam and the second beam according to the uplink reference signal.
For example, in some embodiments of the present application, the determining, by the base station, whether the target terminal is located in the joint scheduling region according to the reference signal received power includes:
and the base station determines whether the absolute value of the difference between the reference signal receiving powers of the first beam and the second beam is greater than or equal to a preset value, and if the absolute value of the difference is smaller than the preset value, the base station determines that the target terminal is located in the joint scheduling area.
It should be noted that the preset value may be configured according to an actual application situation, and is not limited herein.
103. And the base station sends downlink signals to the target terminal according to the 4-antenna sending flow.
In the embodiment of the application, when the base station determines that the target terminal is located in the joint scheduling area, the base station sends a downlink signal to the target terminal according to a 4-antenna sending process.
In this embodiment, the downlink signal refers to a downlink signal sent by a base station to a target terminal, and the downlink signal includes a target downlink physical channel signal, a Synchronization Channel (SCH) signal, and a downlink physical signal. The target downlink physical channel signal comprises: a Physical Downlink Shared Channel (PDSCH), a Physical Broadcast Channel (PBCH), a Physical Control Format Indicator Channel (PCFICH), a physical hybrid automatic repeat indicator channel (PHICH), a Physical Downlink Control Channel (PDCCH); the downlink physical signals include synchronization signals, Cell Reference Signals (CRS), and the like, which are not described herein in detail. It should be noted that, in the embodiments of the present application, the target downlink physical channel signal does not include a synchronization channel signal.
Referring to fig. 3, when the base station determines that the target terminal is located in the joint scheduling area, the base station sends the downlink signal to the target terminal according to the 4-antenna sending flow, which is specifically shown in fig. 3, and details about the processes of modulation, layer mapping, and the like are not repeated here.
104. The base station determines whether the target terminal is located in the independent scheduling area, and if so, executes step 105.
In this embodiment of the present application, after determining that the target terminal is not located in the joint scheduling region, it may be further determined whether the target terminal is located in the independent scheduling region, and if so, step 105 is executed.
In some embodiments of the present application, the base station determines whether an absolute value of a difference between reference signal received powers of the first beam and the second beam is greater than or equal to the preset value, and if so, the base station determines that the terminal is located in the independent scheduling region.
It should be noted that, in some embodiments of the present application, if it is determined that the absolute value of the difference is greater than the preset value, the base station determines that the target terminal is located in an independent scheduling region, and further, the base station may determine whether the target terminal is located in a first independent scheduling region or a second independent scheduling region, where the first independent scheduling region is a region where the coverage area of the first beam is except for the joint scheduling region, and the second independent scheduling region is a region where the coverage area of the second beam is except for the joint scheduling region. Optionally, the base station determines whether the reference signal received power of the first beam is greater than the reference signal received power of the second beam; if yes, the base station further determines that the target terminal is located in a first independent scheduling area; if not, the base station determines that the target terminal is located in a second independent scheduling area.
For example, the preset value may be 5dBm (decibel milliwatt), and if the RSRP of the first beam is greater than the RSRP of the second beam by 6dBm, the absolute value of the difference between the RSRP of the first beam and the RSRP of the second beam is equal to 6dBm, and then the base station determines that the terminal is in the joint scheduling area.
If the RSRP of the first beam is larger than the RSRP of the second beam by 4dBm, the absolute value of the difference value between the RSRP of the first beam and the RSRP of the second beam is equal to 4dBm, and at the moment, the base station determines that the target terminal is in the independent scheduling area; the base station determines that the target terminal is located in the first independent scheduling area because the RSRP of the first beam is larger than the RSRP of the second beam; conversely, when the base station determines that the target terminal is located in the independent scheduling region, if the RSRP of the first beam is smaller than the RSRP of the second beam, the base station determines that the target terminal is located in the second independent scheduling region.
It should be noted that, in the embodiment of the present application, there is no execution sequence precedence relationship between step 102 and step 104, and it may also be determined whether the target terminal is located in the independent scheduling area first, and when the target terminal is not located in the independent scheduling area, it is further determined whether the target terminal is located in the joint scheduling area, which is not limited herein.
105. The base station acquires a pre-coded signal of a target downlink physical channel signal.
In this embodiment of the present application, when a target downlink physical channel signal is a physical downlink shared channel signal, the obtaining, by the base station, a precoded signal of the target downlink physical channel signal includes:
the base station acquires the physical downlink shared channel signals of the first wave beam and the second wave beam;
and the base station generates the pre-coding signal according to the physical downlink shared channel signals of the first wave beam and the second wave beam.
In some embodiments of the present application, the generating, by the base station, the precoded signal according to the physical downlink shared channel signal of the first beam and the second beam includes:
Figure BDA0001303323570000081
wherein, the w0And s0A precoding matrix and a physical downlink shared channel signal, w, of the first beam, respectively1And s1The precoding matrix and the physical downlink shared channel signal of the second wave beam are respectively; the above-mentioned
Figure BDA0001303323570000082
The precoded signal is obtained.
For example, assuming that a terminal located in rank 1 corresponding to the first beam and rank 2 corresponding to the second beam are located, the process of generating the precoded signal is as follows:
Figure BDA0001303323570000083
wherein, the w0,0And s0,0A precoding matrix and a physical downlink shared channel signal, respectively, for the first beam, the
Figure 1
And
Figure BDA0001303323570000085
the precoding matrix and the physical downlink shared channel signal of the second wave beam are respectively; the above-mentioned
Figure BDA0001303323570000091
And generating the pre-coded signal for the physical downlink shared channel signal according to the first beam and the second beam.
It should be noted that, in some embodiments of the present application, the precoding matrix is a precoding matrix selected from LTE protocol 36.211.
Wherein, when the target downlink physical channel signal does not include the physical downlink shared channel signal, that is, when the target downlink physical channel signal includes the PBCH, the PCFICH, the PHICH, and the PDCCH signal, the base station obtains the precoded signal of the target downlink physical channel signal, including: and the base station acquires the pre-coded signal of the target downlink physical channel signal according to the 4-antenna transmission flow. In this embodiment of the present application, when the downlink signal is a PBCH, a PCFICH, a PHICH, or a PDCCH signal, a precoded signal corresponding to the above signal may be obtained according to a 4-antenna transmission procedure.
106. And the base station carries out weighting processing on the pre-coded signals.
In the embodiment of the present application, after a precoded signal of a target downlink physical channel signal is obtained, weighting processing may be performed on the obtained precoded signal.
It is assumed here that the pre-coded signal obtained after step 105 is
Figure BDA0001303323570000092
In some embodiments of the present application, the weighting processing performed by the base station on the precoded signal includes:
the base station performs weighting processing on the pre-coded signals according to the following formula:
Figure BDA0001303323570000093
the W isCRSIs a weighting matrix, the
Figure BDA0001303323570000094
Is the signal after the weighting processing.
107. And the base station sends the weighted signals to the target terminal.
That is, in the embodiment of the present application, in the independent scheduling region, for a target downlink physical channel signal, after a corresponding precoded signal is obtained, the precoded signal is weighted and then transmitted.
It should be noted that, in the independent scheduling region, for some downlink physical signals, for example, cell reference signals, the downlink physical signals are directly subjected to weighting processing and then transmitted; and directly carrying out resource mapping on the synchronous channel signal and then transmitting the synchronous channel signal. Specifically, as shown in fig. 4, the steps of modulation, layer mapping, etc. are not described in detail here.
In summary, in the embodiment of the present application, a 2T antenna feed system of an original base station is used, and a downlink signal is sent to a terminal in a joint scheduling area according to a 4-antenna sending process in an overlapping coverage area of two different beams of the original 2T antenna feed system, so as to obtain 4-stream multiplexing gain; the method realizes the mode of double-splicing the original 2T cell into the 4T cell, can achieve the aim that under the condition of not replacing a 2T antenna feed system of a base station, a combined scheduling area is the 4T cell, so the peak flow of 4x4MIMO can be realized, the space reuse rate is effectively improved, and in an independent scheduling area, a weighting processing is adopted to process the cell reference signal and a physical downlink shared channel signal sending mode, so the channel estimation of the cell reference signal and the channel estimation of the physical downlink shared channel signal are kept consistent, and the problem of channel mismatch can be effectively avoided.
As shown in fig. 5, when terminals 0 and 2 are in the independent scheduling region of the first beam, terminals 0 and 2 perform scheduling in the independent scheduling region of the first beam, terminals 3, 4 and 5 are in the independent scheduling region of the second beam, terminals 3, 4 and 5 perform scheduling in the independent scheduling region of the second beam, and terminal 1 performs scheduling in the joint scheduling region.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules referred to are not necessarily required by the application.
In order to better implement the solution described in the above embodiments of the present application, the following also provides the relevant means for implementing the above solution.
Referring to fig. 6, an embodiment of a base station according to an embodiment of the present disclosure is shown in a schematic structural diagram, where the base station may include: a first determining module 101, a second determining module 102 and a sending module 103. The function or function of each of the above-described modules is described below.
A first determining module 101, configured to determine, when an overlapping coverage area exists between a coverage area of a first beam and a coverage area of a second beam, that the overlapping coverage area is a joint scheduling area, where the first beam and the second beam are beams formed by a 2T antenna feed system of a base station, respectively;
a second determining module 102, configured to determine whether the terminal is located in a joint scheduling area;
if the second determining module 102 determines that the terminal is located in the joint scheduling area, the sending module 103 sends a downlink signal to the terminal according to a 4-antenna sending flow.
Referring to fig. 7, in some embodiments of the present application, the first determining module 101 is further configured to:
when the coverage area of the first beam and the coverage area of the second beam have an overlapping coverage area, determining that the area except the overlapping coverage area in the coverage areas of the first beam and the second beam is an independent scheduling area;
the base station further comprises:
the weighting module 104 is configured to perform weighting processing on the downlink signal if the second determining module 102 determines that the target terminal is located in the independent scheduling area;
the sending module 103 is further configured to send the weighted signal to the target terminal.
In some embodiments of the present application, the downlink signal includes a target downlink physical channel signal, the target downlink physical channel signal does not include a synchronization channel signal, and the weighting module is configured to perform weighting processing on the downlink signal, including:
acquiring a pre-coded signal of the target downlink physical channel signal;
and carrying out weighting processing on the pre-coded signals.
In some embodiments of the present application, the target downlink physical channel signal does not include a physical downlink shared channel signal, and the obtaining, by the weighting module, a precoded signal of the target downlink physical channel signal includes:
and the weighting module is used for acquiring a pre-coded signal of the target downlink physical channel signal according to the 4-antenna sending process.
In some embodiments of the present application, the weighting module is configured to perform weighting processing on the precoded signal, and includes:
the weighting module performs weighting processing on the pre-coded signals according to the following formula:
Figure BDA0001303323570000111
wherein, the
Figure BDA0001303323570000112
For the pre-coded signal obtained according to the 4-antenna transmission process, WCRSIs a weighting matrix, the
Figure BDA0001303323570000113
Is the signal after the weighting processing.
In some embodiments of the present application, when the target downlink physical channel signal is a physical downlink shared channel signal, the obtaining, by the weighting module, a precoded signal of the target downlink physical channel signal includes:
the weighting module is configured to:
acquiring physical downlink shared channel signals of the first wave beam and the second wave beam;
and generating the precoding signal according to the physical downlink shared channel signals of the first beam and the second beam.
In some embodiments of the present application, the weighting module is configured to generate the precoded signal according to a physical downlink shared signal of the first beam and the second beam, and includes:
the weighting module is configured to generate the precoded signal according to the following formula:
Figure BDA0001303323570000114
wherein, the w0And s0A precoding matrix and a physical downlink shared channel signal, w, of the first beam, respectively1And s1The precoding matrix and the physical downlink shared channel signal of the second wave beam are respectively; the above-mentioned
Figure BDA0001303323570000115
The precoded signal is obtained.
In some embodiments of the present application, the weighting module is configured to perform weighting processing on the precoded signal, and includes:
the weighting module performs weighting processing on the pre-coded signals according to the following formula:
Figure BDA0001303323570000121
wherein, the
Figure BDA0001303323570000122
For the precoded signal, the WCRSIs a weighting matrix, the
Figure BDA0001303323570000123
Is the signal after the weighting processing.
Referring to fig. 8, in some embodiments of the present application, a base station further includes:
a receiving module 105, configured to receive an uplink reference signal sent by a target terminal;
a third determining module 106, configured to determine reference signal received powers of the first beam and the second beam according to the uplink reference signal;
the second determining module 102 is configured to determine whether the target terminal is located in the joint scheduling area, and includes:
the second determining module 102 is configured to determine whether the target terminal is located in the joint scheduling area according to the reference signal received power.
In some embodiments of the present application, the second determining module 102 is configured to determine whether the target terminal is located in the joint scheduling region according to the reference signal received power, and includes:
the second determining module 102 is configured to determine whether an absolute value of a difference between the reference signal received powers of the first beam and the second beam is greater than or equal to a preset value, and if the absolute value of the difference is smaller than the preset value, determine that the target terminal is located in the joint scheduling area.
In some embodiments of the present application, the second determining module 102 is further configured to:
if the second determining module 102 determines that the absolute value of the difference is greater than or equal to the preset value, it is determined that the target terminal is located in the independent scheduling area.
It should be noted that, for the information interaction, execution process, and other contents between the modules/units of the apparatus, since the same concept is based on the method embodiment in the embodiment of the present application, the technical effect brought by the method embodiment is the same as that of the method embodiment of the present application, and specific contents may refer to the description in the foregoing method embodiment of the present application, and are not described herein again.
The embodiment of the present application further provides a computer storage medium, where the computer storage medium stores a program, and the program, when executed by a computer, can implement some or all of the steps described in the above method embodiments.
Referring to fig. 9, a schematic structural diagram of another embodiment of a base station provided in the embodiment of the present application is shown, where the base station 200 includes:
a communication port 201, a processor 202, a memory 203 and a computer program stored on the memory (wherein the number of processors 202 in the base station 200 may be one or more, for example one processor in fig. 9). In some embodiments of the present application, the communication port 201, the processor 202, and the memory 203 may be connected by a bus or other means, which is not limited herein, and fig. 9 illustrates an example of connection by a bus.
Memory 203 may include both read-only memory and random access memory and provides instructions and data to processor 202. A portion of the memory 203 may also include a non-volatile random access memory (NVRAM). The memory 203 stores an operating system and operating instructions, executable modules or data structures, or a subset or an expanded set thereof, wherein the operating instructions may include various operating instructions for performing various operations. The operating system may include various system programs for implementing various basic services and for handling hardware-based tasks.
The processor 302 controls the operation of the base station 200, and the processor 202 may also be referred to as a Central Processing Unit (CPU). In a particular application, the various components of the base station are coupled together by a bus system that may include a power bus, a control bus, a status signal bus, etc., in addition to a data bus. For clarity of illustration, the various buses are referred to in the figures as a bus system.
The method disclosed in the embodiments of the present application may be applied to the processor 202, or implemented by the processor 202. The processor 202 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be implemented by the processor 202 executing a computer program in the memory 203. The processor 202 may be a general-purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 203, and the processor 202 reads the information in the memory 203 and completes the steps of the method in combination with the hardware thereof.
The communication port 201 may be used to receive or transmit signaling/information to communicate with a target terminal.
In this embodiment, the processor 202 may implement the signal processing method executed by the base station by using a computer program stored in a memory.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.
The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium such as a Solid State Disk (SSD), among others.
It should be noted that the above-described embodiments of the apparatus are merely schematic, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiments of the apparatus provided in the present application, the connection relationship between the modules indicates that there is a communication connection therebetween, and may be implemented as one or more communication buses or signal lines.
In the several embodiments provided in this application, it should be understood that the disclosed system, module and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus necessary general-purpose hardware, and certainly can also be implemented by special-purpose hardware including special-purpose integrated circuits, special-purpose CPUs, special-purpose memories, special-purpose components and the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions may be various, such as analog circuits, digital circuits, or dedicated circuits. However, for the present application, the implementation of a software program is more preferable. Based on such understanding, the technical solutions of the present application may be substantially embodied in the form of a software product, which is stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk of a computer, and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute the methods described in the embodiments of the present application.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (22)

1. A signal processing method, comprising:
when an overlapping coverage area exists between the coverage area of a first beam and the coverage area of a second beam, a base station determines that the overlapping coverage area is a joint scheduling area, and the first beam and the second beam are respectively beams formed by a 2T antenna feed system of the base station;
the base station determines whether a target terminal is located in the joint scheduling region;
if so, the base station sends a downlink signal to the target terminal according to a 4-antenna sending flow;
when there is an overlapping coverage area of the coverage of the first beam and the coverage of the second beam, the method further comprises:
the base station determines that the areas except the overlapping coverage area in the coverage areas of the first beam and the second beam are independent scheduling areas;
if the target terminal is determined to be located in the independent scheduling area, the base station performs weighting processing on the downlink signal;
and the base station sends the weighted signal to the target terminal.
2. The method of claim 1, wherein the downlink signal comprises a target downlink physical channel signal, the target downlink physical channel signal does not comprise a synchronization channel signal, and the base station performs weighting processing on the downlink signal, comprising:
the base station acquires a pre-coded signal of the target downlink physical channel signal;
and the base station carries out weighting processing on the pre-coded signals.
3. The method of claim 2, wherein the target downlink physical channel signal does not include a physical downlink shared channel signal;
the base station acquiring the pre-coded signal of the target downlink physical channel signal comprises:
and the base station acquires the pre-coded signal of the target downlink physical channel signal according to the 4-antenna transmission flow.
4. The method of claim 3, wherein the weighting the precoded signals by the base station comprises:
the base station performs weighting processing on the pre-coded signals according to the following formula:
Figure FDA0003047015160000011
wherein, the
Figure FDA0003047015160000012
For the pre-coded signal obtained according to the 4-antenna transmission process, WCRSIs a weighting matrix, the
Figure FDA0003047015160000013
Is the signal after the weighting processing.
5. The method of claim 2, wherein the target downlink physical channel signal comprises a physical downlink shared channel signal, and wherein the base station acquiring a pre-coded signal of the target downlink physical channel signal comprises:
the base station acquires the physical downlink shared channel signals of the first wave beam and the second wave beam;
and the base station generates the pre-coding signal according to the physical downlink shared channel signals of the first wave beam and the second wave beam.
6. The method of claim 5, wherein the generating the precoded signal by the base station according to the physical downlink shared channel signals of the first beam and the second beam comprises:
the base station generates the precoded signal according to the following formula:
Figure FDA0003047015160000021
wherein, the w0And s0A precoding matrix and a physical downlink shared channel signal, w, of the first beam, respectively1And s1The precoding matrix and the physical downlink shared channel signal of the second wave beam are respectively; the above-mentioned
Figure FDA0003047015160000022
The precoded signal is obtained.
7. The method of claim 6, wherein the weighting the precoded signals by the base station comprises:
the base station performs weighting processing on the pre-coded signals according to the following formula:
Figure FDA0003047015160000023
wherein, the
Figure FDA0003047015160000024
For the precoded signal, the WCRSIs a weighting matrix, the
Figure FDA0003047015160000025
Is the signal after the weighting processing.
8. The method of claim 1, wherein the base station determines whether a target terminal is located in the joint scheduling region, comprising:
the base station receives an uplink reference signal sent by the target terminal;
the base station determines the reference signal receiving power of the first wave beam and the second wave beam according to the uplink reference signal;
and the base station determines whether the target terminal is positioned in the joint scheduling region according to the reference signal receiving power.
9. The method of claim 8, wherein the base station determines whether the target terminal is located in the joint scheduling region according to the reference signal received power of the first beam and the second beam, comprising:
and the base station determines whether the absolute value of the difference between the reference signal receiving powers of the first beam and the second beam is greater than or equal to a preset value, and if the absolute value of the difference is smaller than the preset value, the base station determines that the target terminal is located in the joint scheduling area.
10. The method of claim 9, further comprising:
and if the absolute value of the difference is larger than or equal to the preset value, the base station determines that the target terminal is located in the independent scheduling area.
11. A base station, comprising:
a first determining module, configured to determine, when an overlapping coverage area exists between a coverage area of a first beam and a coverage area of a second beam, that the overlapping coverage area is a joint scheduling area, where the first beam and the second beam are beams formed by a 2T antenna feed system of the base station, respectively;
a second determining module, configured to determine whether a target terminal is located in the joint scheduling area;
a sending module, configured to send a downlink signal to the terminal according to a 4-antenna sending process if the second determining module determines that the terminal is located in the joint scheduling area;
the first determination module is further to:
when the coverage area of the first beam and the coverage area of the second beam have an overlapping coverage area, determining that the area except the overlapping coverage area in the coverage areas of the first beam and the second beam is an independent scheduling area;
the base station further comprises:
the weighting module is used for weighting the downlink signal if the second determining module determines that the target terminal is located in the independent scheduling area;
the sending module is further configured to send the signal weighted by the weighting module to the target terminal.
12. The base station of claim 11, wherein the downlink signal includes a target downlink physical channel signal, the target downlink physical channel signal does not include a synchronization channel signal, and the weighting module is configured to perform weighting processing on the downlink signal, and includes:
acquiring a pre-coded signal of the target downlink physical channel signal;
and carrying out weighting processing on the pre-coded signals.
13. The base station of claim 12, wherein the target downlink physical channel signal does not include a physical downlink shared channel signal, and the weighting module is configured to obtain a pre-coded signal of the target downlink physical channel signal and includes:
and the weighting module is used for acquiring a pre-coded signal of the target downlink physical channel signal according to the 4-antenna sending process.
14. The base station of claim 13, wherein the weighting module is configured to weight the precoded signal, and comprises:
the weighting module performs weighting processing on the pre-coded signals according to the following formula:
Figure FDA0003047015160000041
wherein, the
Figure FDA0003047015160000042
For the pre-coded signal obtained according to the 4-antenna transmission process, WCRSIs a weighting matrix, the
Figure FDA0003047015160000043
Is the signal after the weighting processing.
15. The base station of claim 12, wherein the target downlink physical channel signal comprises a physical downlink shared channel signal, and the weighting module is configured to obtain a pre-coded signal of the target downlink physical channel signal and comprises:
the weighting module is configured to:
acquiring physical downlink shared channel signals of the first wave beam and the second wave beam;
and generating the precoding signal according to the physical downlink shared channel signals of the first beam and the second beam.
16. The base station of claim 15, wherein the weighting module is configured to generate the precoded signal according to a physical downlink shared signal of the first beam and the second beam, and includes:
the weighting module is configured to generate the precoded signal according to the following formula:
Figure FDA0003047015160000044
wherein, the w0And s0A precoding matrix and a physical downlink shared channel signal, w, of the first beam, respectively1And s1The precoding matrix and the physical downlink shared channel signal of the second wave beam are respectively; the above-mentioned
Figure FDA0003047015160000045
The precoded signal is obtained.
17. The base station of claim 16, wherein the weighting module is configured to weight the precoded signal, and comprises:
the weighting module performs weighting processing on the pre-coded signals according to the following formula:
Figure FDA0003047015160000051
wherein, the
Figure FDA0003047015160000052
For the precoded signal, the WCRSIs a weighting matrix, the
Figure FDA0003047015160000053
Is the signal after the weighting processing.
18. The base station of claim 11, wherein the base station further comprises:
a receiving module, configured to receive an uplink reference signal sent by the target terminal;
a third determining module, configured to determine reference signal received powers of the first beam and the second beam according to the uplink reference signal;
the second determining module is configured to determine whether a target terminal is located in the joint scheduling area, and includes:
the second determining module is configured to determine whether the target terminal is located in the joint scheduling region according to the reference signal received power.
19. The base station of claim 18, wherein the second determining module is configured to determine whether the target terminal is located in the joint scheduling region according to the reference signal received power, and comprises:
the second determining module is configured to determine whether an absolute value of a difference between the reference signal received powers of the first beam and the second beam is greater than or equal to a preset value, and if the absolute value of the difference is smaller than the preset value, determine that the target terminal is located in the joint scheduling area.
20. The base station of claim 19, wherein the second determining module is further configured to:
and if the second determining module determines that the absolute value of the difference is greater than or equal to the preset value, determining that the target terminal is located in the independent scheduling area.
21. A base station comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the method of any one of claims 1-10 when executing the computer program.
22. A computer-readable storage medium having stored therein instructions which, when executed on a computer, cause the computer to perform the method of any one of claims 1-10.
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