WO2020199062A1 - Radio frequency transceiver, communication device and radio frequency path control method - Google Patents

Abstract

Provided are a radio frequency transceiver, a communication device and a radio frequency path control method, so as to satisfy the control requirements of a transceiver path in an evolved mobile communication system. The radio frequency transceiver supports time division duplexing (TDD) communication, and comprises a control circuit, a transmission path and a receiving path. The control circuit is coupled to the transmission path and the receiving path, so as to generate a path control signal according to uplink-downlink attributes of time slot symbols in a TDD radio frame, and controlling, according to the path control signal, the connection and disconnection of the transmission path and the connection and disconnection of the receiving path.

Description

Radio frequency transceiver, communication equipment and radio frequency channel control method Technical field

This application relates to the field of communication technology, and in particular to a radio frequency transceiver, communication equipment, and radio frequency channel control method.

Background technique

The structure of the radio frame in the long term evolution (LTE) time division duplexing (TDD) communication system is shown in Figure 1. A TDD radio frame consists of two 5ms half frames, and each half frame contains There are 5 subframes of 1ms length, one subframe includes 2 time slots, and each time slot is 0.5ms, as shown in Figure 1. Among them, subframe #1 and subframe #6 can be configured as special subframes. The special subframe includes 3 special time slots, namely, downlink pilot time slot (DwPTS) and guard period (GP). ) And uplink pilot time slot (uplink pilot time slot, UpPTS). According to the different requirements of uplink and downlink, the agreement specifies the seven types of uplink-downlink configuration strategies in the TDD LTE communication system shown in Table 1, where U represents the uplink subframe and D represents the downlink subframe. Frame, S represents a special subframe.

Table 1 Reference table for uplink and downlink configuration of LTE TDD frame structure

The switch on the transceiver path in the LTE TDD communication system is based on the radio frame structure of the LTE TDD communication system to switch between the downlink and the uplink switch. As can be seen from Table 1, the uplink and downlink services in the LTE TDD communication system use subframes as switching points. The position of the special subframe (downlink and uplink service switching point) of each TDD radio frame is fixed on frame #1 and frame #6. Therefore, there are at most two downlink end positions and uplink end positions in a TDD radio frame. Configure the control signal containing two segments of the end position of the downlink and the wireless communication service control signal containing the two segments of the end position of the uplink, you can get the timing of the switch on the transceiver path according to the wireless frame structure of the LTE TDD communication system, where the switch of the transmit path includes Switches such as small signal switch, power amplifier switch, and transceiver switch. The switches on the receiving path include switches such as low noise amplifier (LNA). In addition, other services such as the calibration (CAL) service and the frequency domain reflectometer (FDR) service will also affect the switching sequence of the switch on the transceiver path. Since the TDD communication data transceiver service is the main service, other services generally It is carried out in the GP section without affecting the main service, so the location and number of services such as correction services and FDR services in the TDD radio frame are restricted.

With the evolution of mobile communication technology, the fifth generation mobile communication technology (5G) emerged. In the 5G communication system, the new radio (NR) TDD radio frame contains 10 subframes with a length of 1ms. Each TDD radio frame can be divided into two half frames. The first half frame is 5ms, Contains subframe #0 to subframe #4, the second half frame is 5ms long, and includes subframe #5 to subframe #9. This feature is the same as the LTE communication system, so that NR and LTE can be better compatible. At the same time, NR in the 5G communication system further defines a more flexible sub-architecture, allowing time slots and character lengths to be defined based on sub-carrier spacing. The number of time slots contained in each subframe can be 1, 2, 4, 8, 16, or 32. At this time, the subcarrier intervals corresponding to each subframe are 15KHz, 30KHz, 60KHz, 120KHz, 240KHz, and 480KHz, respectively. Each slot contains 14 symbols, as shown in Figure 2. In the LTE TDD communication system, there are at most two downlink end positions and two uplink end positions in a TDD radio frame. Therefore, the control method of the switch on the transceiver path in the LTE TDD communication system can no longer meet the needs of the 5G communication system, and it is urgent to propose A new control method for switches on the receiving and sending channels.

Summary of the invention

This application provides a radio frequency transceiver, a communication device, and a radio frequency channel control method to meet the control requirements of the transceiver channel in an evolved mobile communication system.

In the first aspect, this application provides a radio frequency transceiver for supporting time division duplex TDD communication. The radio frequency transceiver includes a control circuit, a transmission path, and a reception path. Among them, the control circuit is respectively coupled to the transmission path and the reception path, and is used to generate a path control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame, and control the on and off of the transmission path and the on and off of the reception path according to the path control signal.

Through the above solution, the radio frequency transceiver can control the on and off of the transmitting channel and the on and off of the receiving channel with the granularity of the time slot symbols. The control method is more flexible, which can not only meet the on and off control of the transceiver channel in the 5G TDD communication system, but also Compatible with the on-off control of the transceiver channel in the 4G TDD communication system.

In a possible implementation manner, the uplink and downlink attributes of the time slot symbols in the TDD radio frame are determined according to the type of wireless communication service carried by the transmitting path and the type of wireless communication service carried by the receiving path.

In a possible implementation manner, the wireless communication service carried by the transmission path includes at least one of a communication data transmission service, a correction transmission service, and an FDR service, and the wireless communication service carried by the reception path includes a communication data reception service and a correction reception service. At least one.

In a possible implementation manner, the radio frequency transceiver further includes a memory for storing the corresponding relationship between the state of the switch and the index value. The switch is used to control the on-off of the transmission path and the on-off of the receiving path. The index The value is determined according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the reception path. The state of the switch corresponding to the index value is determined according to the requirements of the wireless communication service and the wireless communication service carried by the transmission path and the reception path bearer The priority of wireless communication services is determined.

The control circuit generates a path control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame, which is specifically used to generate the wireless communication service carried by the transmission path according to the wireless service requirements and the uplink and downlink attributes of the time slot symbols in the TDD radio frame. The control signal and the control signal of the wireless communication service carried by the receiving path; determine the target index value according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the receiving path; according to the target index value, from the corresponding The state of the switch corresponding to the target index value is searched in the relationship; according to the state of the switch corresponding to the target index value, a control signal corresponding to the switch is generated, and the control signal corresponding to the switch is a path control signal. At this time, the control circuit controls the on and off of the transmitting path and the on and off of the receiving path according to the control signal corresponding to the switch.

Through the above solution, the control circuit can determine the control signal of the switch on the transmitting path and the control signal of the switch on the receiving path by looking up the corresponding relationship stored in the memory, according to the control signal of the switch on the transmitting path and the switch on the receiving path. The control signal respectively controls the on and off of the transmission path and the on and off of the receiving path. The corresponding relationship stored in the memory can be flexibly configured, so that the on and off strategy of the transmission path and the on and off strategy of the receiving path can be flexibly changed, thereby making the radio frequency The transceiver can support more types of wireless communication services and can expand the usage scenarios of the radio frequency transceiver.

In a possible implementation manner, the index value in the correspondence stored in the memory may be an N-bit binary number, where N is the total number of wireless communication services carried by the transmission path and the wireless communication services carried by the reception path. When the control circuit determines the target index value according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the reception path, it is specifically used for: according to the wireless communication service carried by the transmission path and the wireless communication carried by the reception path The corresponding relationship between the service and each bit in the index value, the control signal of the wireless communication service carried by the transmitting path and the control signal of the wireless communication service carried by the receiving path, determine the value of each bit in the target index value.

Among them, for any one of the wireless communication service carried by the transmission path and the wireless communication service carried by the reception path, when the control signal of the wireless communication service is at a high level, the bit corresponding to the wireless communication service in the target index value is 1. When the control signal of the wireless communication service is low, the bit corresponding to the wireless communication service in the target index value is 0; or when the control signal of the wireless communication service is low, the target index value The bit corresponding to the wireless communication service is 1, and when the control signal of the wireless communication service is at a high level, the bit corresponding to the wireless communication service in the target index value is 0.

In a possible implementation manner, the radio frequency transceiver further includes a first timing adjustment circuit for before the control circuit determines the target index value according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the reception path , The effective signal of the control signal of the wireless communication service carried by the transmission path and the effective signal of the control signal of the wireless communication service carried by the receiving path 430 are adjusted to be aligned with the position of the air interface, so as to improve the control circuit’s influence on the transmission path. The on-off and the control accuracy of the receiving channel.

In a possible implementation manner, the radio frequency transceiver further includes a second timing adjustment circuit, which is used to control the on and off of the receiving path and the on and off of the transmission path according to the control signal corresponding to the switch by the control circuit, respectively, according to whether the switch is on or off. The delay in switching between the on state and the off state and the coordinated response relationship between the switches adjust the control signal corresponding to the switch to further improve the control accuracy of the on-off of the transmitting path and the receiving path by the control circuit.

In a possible implementation manner, the control circuit is further configured to: receive an abnormal control signal, and adjust the path control signal according to the abnormal control signal.

In the second aspect, this application also provides a TDD communication device, which includes a processor and the radio frequency transceiver described in any one of the possible implementations of the first aspect. Among them, the processor is used to configure the uplink and downlink attributes of the time slot symbols in the TDD wireless frame; the radio frequency transceiver is coupled to the processor and is used to generate a channel control signal according to the uplink and downlink attributes of the time slot symbols in the TDD wireless frame, According to the channel control signal, the on-off of the receiving channel and the on-off of the transmitting channel in the radio frequency transceiver are controlled.

In the third aspect, this application also provides a radio frequency channel control method, which is applied to TDD communication equipment. The method includes: generating a channel control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame; and controlling the TDD according to the channel control signal The on-off of the receiving channel and the on-off of the transmitting channel in the communication equipment.

Through the above method, the TDD communication device can control the on and off of the transmitting channel and the on and off of the receiving channel at the granularity of the time slot symbols, and the control method is more flexible. It can not only meet the on-off control of the transceiver channel in the 5G TDD communication system, but also It is compatible with the on-off control of the transceiver channel in the 4G TDD communication system.

In a possible implementation manner, the uplink and downlink attributes of the time slot symbols in the TDD radio frame are determined according to the type of wireless communication service carried by the transmitting path and the type of wireless communication service carried by the receiving path.

In a possible implementation manner, the wireless communication service carried by the transmission path includes at least one of a communication data transmission service, a correction transmission service, and an FDR service, and the wireless communication service carried by the reception path includes a communication data reception service and a correction reception service. At least one.

In a possible implementation manner, the corresponding relationship between the state of the switch and the index value is stored in the TDD communication device, where the switch is used to control the on-off of the transmission path and the on-off of the receiving path, and the index value is carried by the transmission path. The control signal of the wireless communication service and the control signal of the wireless communication service carried by the receiving channel are determined, and the state of the switch corresponding to the index value is determined according to the wireless communication service demand and the wireless communication service carried by the transmitting channel and the wireless communication service carried by the receiving channel The priority is determined. At this time, the TDD communication device can specifically generate a path control signal through the following methods:

i. Generate the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the reception path according to the wireless service requirements and the uplink and downlink attributes of the time slot symbols in the TDD wireless frame;

ii. Determine the target index value according to the control signal of the wireless communication service carried by the transmitting path and the control signal of the wireless communication service carried by the receiving path;

iii. According to the target index value, search for the state of the switch corresponding to the target index value from the saved correspondence relationship;

iv. According to the state of the switch corresponding to the target index value, a control signal corresponding to the switch is generated, and the control signal corresponding to the switch is a path control signal.

Through the above method, the TDD device can determine the control signal of the switch on the transmission path and the control signal of the switch on the receiving path by searching the stored correspondence, according to the control signal of the switch on the transmission path and the control of the switch on the receiving path Signal, respectively control the on and off of the transmission path and the on and off of the receiving path, wherein the corresponding relationship stored in the TDD device can be flexibly configured, so that the on and off strategy of the transmission path and the on and off strategy of the receiving path can be flexibly changed, thereby making the The TDD device can support more wireless communication service types, and can expand the usage scenarios of the TDD device.

In a possible implementation manner, the index value may be represented by an N-bit binary number, where N is the total number of wireless communication services carried by the transmission path and the wireless communication services carried by the reception path. At this time, the TDD communication device can specifically determine the target index value in the following manner: according to the correspondence between the wireless communication service carried by the transmission path and the wireless communication service carried by the reception path and each bit in the index value, the wireless communication service carried by the transmission path The control signal of the communication service and the control signal of the wireless communication service carried by the receiving path determine the value of each bit in the target index value. Among them, for any one of the wireless communication service carried by the transmission path and the wireless communication service carried by the reception path, when the control signal of the wireless communication service is at a high level, the bit corresponding to the wireless communication service in the target index value is 1. When the control signal of the wireless communication service is low, the bit corresponding to the wireless communication service in the target index value is 0; or when the control signal of the wireless communication service is low, the target index value The bit corresponding to the wireless communication service is 1, and when the control signal of the wireless communication service is at a high level, the bit corresponding to the wireless communication service in the target index value is 0.

In a possible implementation manner, the TDD communication device further controls the wireless communication service carried by the transmission path before determining the target index according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the reception path. The effective signal in the signal and the effective signal in the control signal of the wireless communication service carried by the receiving path are respectively adjusted to be aligned with the position of the air interface to improve the on-off of the transmission path and the control accuracy of the receiving path.

In a possible implementation manner, the TDD communication device controls the on and off of the receiving path and the on and off of the transmitting path according to the control signal corresponding to the switch, respectively according to the switch when the switch is switched between the on state and the off state. The delay and the coordinated response relationship between the switches and the adjustment of the control signal corresponding to the switch can further improve the on-off of the transmission path and the control accuracy of the reception path.

Description of the drawings

Figure 1 is a schematic diagram of the structure of a TDD radio frame in an LTE TDD communication system;

Figure 2 is a schematic diagram of the structure of a TDD radio frame in a 5G communication system;

Figure 3 shows the control signals of the switches on the transmission path corresponding to different wireless communication services in the traditional LTE TDD communication system;

FIG. 4 is one of the schematic structural diagrams of a radio frequency transceiver provided by an embodiment of the application;

FIG. 5 is a schematic structural diagram of a transmitting channel and a receiving channel provided by an embodiment of the application;

FIG. 6 is the second structural diagram of a radio frequency transceiver according to an embodiment of the application;

FIG. 7 is a schematic diagram of control signals of different wireless communication services provided by an embodiment of this application;

FIG. 8 is the third structural diagram of a radio frequency transceiver provided by an embodiment of this application;

FIG. 9 is the fourth structural diagram of a radio frequency transceiver according to an embodiment of the application;

FIG. 10 is a schematic diagram of the working principle of a radio frequency transceiver provided by an embodiment of the application;

FIG. 11 is a schematic structural diagram of a TDD communication device provided by an embodiment of this application;

FIG. 12 is a schematic structural diagram of a distributed base station provided by an embodiment of this application;

FIG. 13 is a schematic flowchart of a radio frequency channel control method provided by an embodiment of the application.

detailed description

With the evolution of mobile communication technology, 5G communication technology has emerged. In the 5G communication system, the definition of the TDD radio frame structure is more flexible, allowing time slots and character lengths to be defined according to the subcarrier interval. The number of time slots contained in each subframe can be 1, 2, 4, 8, 16, or 32. At this time, the subcarrier intervals corresponding to each subframe are 15KHz, 30KHz, 60KHz, 120KHz, 240KHz, and 480KHz.

The traditional LTE TDD communication system is based on the TDD radio frame structure shown in Figure 1 to switch between the downlink and uplink switches. There are at most two downlink end positions and two uplink end positions in a TDD radio frame. The configuration includes two The control signal of the end position of the downlink and the control signal of the wireless communication service including the end position of the two uplinks can be obtained according to the TDD radio frame structure. For example, as shown in Figure 3, when the traditional LTE TDD communication system When communicating with the TDD wireless frame structure corresponding to the uplink and downlink configuration 6, by configuring the normal communication data receiving and sending service control signal containing two segments of the downlink end position and the normal communication data receiving and sending service control signal containing two segments of the uplink end position, you can follow Prepare the TDD radio frame structure corresponding to the uplink and downlink configuration 6 to obtain the control signals of the switches on the transmission path and the receiving path corresponding to the normal communication data receiving and sending services. Similarly, the control signals of the switches on the transmission path and the receiving path corresponding to the correction service can also be obtained. , And the control signal of the switch on the transmission path corresponding to the FDR service (Figure 3 only shows the control signal of the switch on the transmission path corresponding to different wireless communication services (for example, the power amplifier switch on the transmission path)), in different wireless communication services In the functional scenario, the response of the control signal of the switch on the transmitting path and the receiving path in the GP interval is different. Therefore, the traditional LTE TDD communication system control method for the transmission and reception channel has been unable to meet the needs of the 5G communication system, and it is urgent to propose a new transmission and reception channel control method.

In order to solve the above-mentioned problems in the prior art, this application provides a radio frequency transceiver, a communication device, and a radio frequency transceiver channel control method. Among them, the method and device described in the present application are based on the same concept, and because the method and the device have similar principles for solving the problem, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

In order to make the purpose, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 4, the present application provides a radio frequency transceiver 400 for supporting TDD communication. The radio frequency transceiver 400 is applied to a TDD communication device. The TDD communication device may be a terminal device, such as a mobile phone or a wireless transceiver. Computers, virtual reality (VR) equipment, industrial control (industrial control) wireless equipment, etc., can also be network-side equipment, such as next generation node B (gNB) in 5G, radio frequency Remote unit (radio remote unit, RRU), etc.

The radio frequency transceiver 400 includes a control circuit 410, a transmission path 420, and a reception path 430. Wherein, the control circuit 410 is respectively coupled to the transmission path 420 and the reception path 430, and is used to generate a path control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame, and control the on and off of the transmission path 420 and the reception path according to the path control signal. 430 on and off. Wherein, the control circuit 410 may be implemented by an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA).

It should be understood that the radio frequency transceiver provided in the embodiments of the present application is a complete radio frequency transceiver, and also has the structure of known radio frequency transceivers. Here, only the on-off control of the transmission path in the radio frequency transceiver and The components that receive the on-off control of the path will be described, and other components will not be repeated.

In the 4G communication system, the protocol specifies the uplink and downlink configuration modes of the 7 LTE TDD frame structures shown in Table 1. The 4G communication system controls the on and off of the radio frequency transceiver channel at the granularity of subframes, and a TDD in the 4G communication system The radio frame includes 10 subframes, each subframe includes two time slots, and each time slot includes 14 time slot symbols. A TDD radio frame in a 5G communication system also includes 10 subframes. Therefore, when TDD in a 5G communication system The uplink and downlink attributes of the time slot symbols included in each subframe in the radio frame are the same. When the TDD radio frame structure is configured according to the uplink and downlink configuration mode of the LTE TDD frame structure shown in Table 1, the radio frequency transceiver 400 provided in this application can also When applied to a 4G communication system, that is, the radio frequency transceiver 400 can be compatible with a 4G communication system.

Further, the uplink and downlink attributes of the time slot symbols in the TDD radio frame are determined according to the type of wireless communication service carried by the transmit path 420 and the type of wireless communication service carried by the receive path 430, that is, the upper and lower levels of the time slot symbols in the radio frame. The attributes can be configured according to the type of wireless communication service. Specifically, the upper and lower attributes of the time slot symbols in the TDD radio frame include, but are not limited to, communication data transmission service downlink symbols (used to carry communication data transmission services), correction transmission service downlink symbols (used to carry correction transmission services), and FDR services. Downlink symbols (used to carry the FDR service), communication data reception service uplink symbols (used to carry the communication data reception service), and correction reception service uplink symbols (used to carry the correction reception service).

The wireless communication service carried by the transmission path 420 includes at least one of a communication data transmission service, a correction transmission service, and an FDR service, and the wireless communication service carried by the reception path 430 includes at least one of a communication data reception service and a correction reception service. . In other words, the radio frequency transceiver 400 can support correction services and FDR services on any time slot symbols, and then perform correction services and FDR services on multiple time slot symbols in a TDD radio frame.

Among them, the transmission channels of at least two wireless communication services in the transmission path 420 used to carry the communication data transmission service, the correction transmission service and the FDR service may be the same transmission path or different transmission paths, that is, communication data transmission At least two wireless communication services among the service, the correction transmission service and the FDR service can multiplex the same transmission channel, or configure their corresponding transmission channels; similarly, they are used to carry the communication data reception service and the reception channel of the correction reception service It can be the same receiving channel or different receiving channels, that is, the communication data receiving service and the receiving correction service can be multiplexed with the same receiving channel, or the corresponding receiving channels can be configured.

It should be noted that the specific wireless communication services carried by the transmission path 420 and the specific wireless communication services carried by the reception path 430 are only examples for illustration and do not limit the embodiment of this application. In the implementation of this application, the specific wireless communication service carried by the transmission path 420 In addition to the above-mentioned services, the communication services and the wireless communication services carried by the receiving path 430 may also be other TDD wireless communication services newly added in the future.

In a specific embodiment, as shown in FIG. 5, the transmission path 420 carrying the communication data transmission service may include a first-stage power amplifier, a second-stage power amplifier, a circulator, and a band pass filter (band pass filter, BPF) and antenna; the receiving path 430 carrying the communication data receiving service may include a receiving feedback switch, a low noise amplifier (LNA), and a low temperature co-fired ceramic connected in sequence. , LTCC) filter, transmit-receive switch, band-pass filter, and antenna; the receiving channel 430 carrying the reception correction service includes: a receiving feedback switch and an antenna connected in sequence.

Further, as shown in FIG. 6, the radio frequency transceiver 400 further includes a memory 440 for storing the corresponding relationship between the state of the switch and the index value, wherein the switch is used to control the on and off of the transmission path 420 and the reception path 430 respectively. On and off, the index value is determined according to the control signal of the wireless communication service carried by the transmission path 420 and the control signal of the wireless communication service carried by the receiving path 430. The state of the switch corresponding to the index value is determined according to the requirements of the wireless communication service and the transmission path 420 The priority of the wireless communication service and the wireless communication service carried by the receiving path 430 are determined.

At this time, the control circuit 410 generates a path control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame, which is specifically used to generate the transmission path 420 bearer according to the wireless service requirements and the uplink and downlink attributes of the time slot symbols in the TDD radio frame. The control signal of the wireless communication service and the control signal of the wireless communication service carried by the receiving path 430; determine the target index value according to the control signal of the wireless communication service carried by the transmission path 420 and the control signal of the wireless communication service carried by the receiving path 430; The target index value searches for the state of the switch corresponding to the target index value from the correspondence relationship; generates a control signal corresponding to the switch according to the state of the switch corresponding to the target index value, and the control signal corresponding to the switch is a path control signal. At this time, the control circuit 410 controls the on-off of the transmitting path 420 and the on-off of the receiving path 430 according to the control signal corresponding to the switch.

The memory 440 may be implemented by a storage element such as random access memory (RAM), electrically erasable programmable read-only memory (EEPROM), or look-up table (LUT). When the priority of the wireless communication service carried by the transmission path 420 and the wireless communication service carried by the reception path 430 changes, the switch on the transmission path 420 and the reception path 430 can be flexibly changed by reconfiguring the corresponding relationship stored in the memory 440. The control priority of the upper switch, that is, the on-off strategy of the transmitting path 420 and the on-off strategy of the receiving path 430 can be flexibly changed, so that the radio frequency transceiver 400 can support more wireless communication service types and can expand the radio frequency transceiver 400 Usage scenarios.

For example, when the uplink and downlink attributes of each time slot symbol in a time slot in the TDD radio frame are shown in FIG. 7, the control circuit 410 according to the current wireless communication requirements and the uplink and downlink of the time slot symbols shown in FIG. Attributes, generate control signals of the communication data transmission service carried by the transmission path 420, control signals of the communication data reception service carried by the reception path 430, control signals of the correction reception service carried by the reception path 430, and correction transmission services carried by the transmission path 420 The control signal and the control signal of the FDR service carried by the transmission path 420.

Further, the index value in the correspondence stored in the memory 440 may be an N-bit binary number, where N is the total number of wireless communication services carried by the transmission path 420 and the wireless communication services carried by the reception path 430. When the control circuit 410 determines the target index value according to the control signal of the wireless communication service carried by the transmission path 420 and the control signal of the wireless communication service carried by the reception path 430, it is specifically used for: according to the wireless communication service carried by the transmission path 420 and the reception path The corresponding relationship between the wireless communication service carried by 430 and each bit in the index value, the control signal of the wireless communication service carried by the transmission path 420 and the control signal of the wireless communication service carried by the reception path 430, determine each of the target index values The value of bits; among them, for any one of the wireless communication service carried by the transmission path 420 and the wireless communication service carried by the reception path 430, when the control signal of the wireless communication service is at a high level, the target index value The bit corresponding to the wireless communication service is 1. When the control signal of the wireless communication service is low, the bit corresponding to the wireless communication service in the target index value is 0; or, when the control signal of the wireless communication service is When it is low, the bit corresponding to the wireless communication service in the target index value is 1, and when the control signal of the wireless communication service is high, the bit corresponding to the wireless communication service in the target index value is 0. In a specific embodiment, the index value in the correspondence stored in the memory 440 may be represented by the storage address of each entry in the correspondence in the memory 440. At this time, the depth of the memory 440 is at least 2 ^N and the width It is at least M, and M is the total number of switches on the transmitting path 420 and the receiving path 430 for controlling the on and off of the transmitting path 420 and the receiving path 430.

For example, the wireless communication services carried by the transmission path 420 include communication data transmission services, correction transmission services, and FDR services, and the wireless communication services carried by the reception path 430 include communication data reception services and correction reception services. At this time, the index value is 5 bits. Binary numbers. The correspondence between the wireless communication service carried by the transmission path 420 and the wireless communication service carried by the reception path 430 and each bit in the index value is: FDR service, correction reception service, correction transmission service, communication data transmission service, and communication data reception The service corresponds to each bit from high to low in the index value in turn, that is, the FDR service corresponds to the highest bit in the index value, and the receiving service corresponds to the next highest bit in the index value, and so on, communication data The received service corresponds to the lowest bit in the index value. When the control signal corresponding to the FDR service is low, the control signal corresponding to the correction receiving service is high, the control signal corresponding to the correction sending service is low, the control signal corresponding to the communication data transmission service is high, and the communication When the control signal corresponding to the data receiving service is at a low level (where a high level indicates that the corresponding control signal is valid, and a low level indicates that the corresponding control signal is invalid), the target index value is 01010.

It should be noted that the correspondence between the wireless communication service carried by the transmission path 420 and the wireless communication service carried by the reception path 430 and each bit in the index value, the control signal of the wireless communication service carried by the transmission path 420 and the reception The method of determining the target index value for the control signal of the wireless communication service carried by the path 430 is a possible implementation method for determining the target index value, and does not limit the embodiment of the present application. Anything that can carry the transmission path 420 The control signal of the wireless communication service and the control signal of the wireless communication service carried by the receiving path 430 are converted into a control signal that can uniquely identify the wireless communication service carried by the transmission path 420 and the control signal of the wireless communication service carried by the receiving path 430 corresponds to the switch state The index value method of is applicable to the embodiments of the present application.

Further, as shown in FIG. 8, the radio frequency transceiver 400 further includes a first timing adjustment circuit 450, which is used for the control circuit 410 according to the control signal of the wireless communication service carried by the transmission path 420 and the reception of the wireless communication service carried by the path 430. Before the control signal determines the target index value, the effective signal of the control signal of the wireless communication service carried by the transmission path 420 and the effective signal of the control signal of the wireless communication service carried by the receiving path 430 are adjusted to be aligned with the position of the air interface. , In order to improve the control accuracy of the control circuit 410 on and off the transmitting path 420 and the receiving path 430.

Further, as shown in FIG. 9, the radio frequency transceiver 400 further includes a second timing adjustment circuit 460, which is used before the control circuit 410 controls the on-off of the receiving channel 430 and the on-off of the transmitting channel 420 according to the control signal corresponding to the switch. , Adjust the control signal corresponding to the switch according to the time delay when the switch is switched between the on state and the off state and the coordinated response relationship between the switches to further improve the on-off of the transmission path 420 by the control circuit 410 And the control accuracy of the receiving channel 430.

Further, the control circuit 410 is also used to receive an abnormal control signal, and adjust the path control signal according to the abnormal control signal. Specifically, the control circuit 410 performs logical operations on the abnormal control signal and the path control signal, so that during the time period when the abnormal control signal is valid, the transmitting path 420 and the receiving path 430 respond to the abnormal control signal, and after the abnormal control signal is invalid , The normal response to the path control signal before the abnormal control signal is received.

The working principle of the radio frequency transceiver 300 provided in the present application will be described in detail below by taking the transmitting path 420 and the receiving path 430 shown in FIG. 5 as an example.

As shown in FIG. 10, the control circuit 410 generates the control signal of the wireless communication service carried by the transmission path 420 and the control signal of the wireless communication service carried by the reception path 430 according to the wireless service requirements and the uplink and downlink attributes of the time slot symbols in the TDD wireless frame. , Wherein the wireless communication services carried by the transmission path 420 include communication data transmission services, correction transmission services, and FDR services. The communication data transmission services, correction transmission services, and FDR services share the same transmission path 420, and the wireless communication services carried by the reception path 430 include The communication data receiving service and the correction receiving service, and the communication data receiving service and the correction receiving service correspond to different receiving paths 430.

The first timing adjustment circuit 450 adjusts the effective signal of the control signal of the wireless communication service carried by the transmission path 420 and the effective signal of the control signal of the wireless communication service carried by the receiving path 430 to be aligned with the position of the air interface, respectively. , The effective signal in the control signal of the wireless communication service carried by the transmitting path 420 and the effective signal of the control signal of the wireless communication service carried by the receiving path 430 are at a high level.

According to the corresponding relationship between the wireless communication service carried by the transmission path 420 and the wireless communication service carried by the reception path 430 and each bit in the index value, the control circuit 410 performs the wireless communication carried by the transmission path 420 adjusted by the first timing adjustment circuit 450 The control signal of the service and the control signal of the wireless communication service carried by the receiving path 430 determine the value of each bit in the target index value; among them, the wireless communication service carried by the transmitting path 420 and the wireless communication service carried by the receiving path 430 are the same as The corresponding relationship of each bit in the index value is: FDR service, correction receiving service, correction sending service, communication data receiving service, and communication data sending service correspond to each bit in the index value from high to low in turn. Any one of the wireless communication service carried by the transmitting path 420 and the wireless communication service carried by the receiving path 430, when the control signal of the wireless communication service is high (indicating that the wireless communication service needs to be executed), the target index value The bit corresponding to the wireless communication service is 1. When the control signal of the wireless communication service is low (indicating that the wireless communication service does not need to be executed), the bit corresponding to the wireless communication service in the target index value is 0 .

According to the target index value, the control circuit 410 searches for the state of the switch corresponding to the target index value from the corresponding relationship stored in the RAM (or LUT) (in the corresponding relationship, 1 indicates that the corresponding switch is on, and 0 indicates that the corresponding switch is off). ; According to the state of the switch corresponding to the target index value and the control signal of the wireless communication service carried by the transmission path 420 and the control signal of the wireless communication service carried by the receiving path 430, a control signal corresponding to the switch is generated, and the control signal corresponding to the switch is The channel control signal controls the on-off of the transmitting channel 420 and the on-off of the receiving channel 430 according to the control signal corresponding to the switch.

At the same time, the control circuit 410 can also adjust the control signal corresponding to the generated switch according to the received abnormal control signal so that the transmitting path 420 and the receiving path 430 respond to the abnormal control signal during the time period when the abnormal control signal is valid, that is, for Some real-time alarms/abnormalities or shutdowns are processed. After the abnormal control signal becomes invalid, the normal response to the path control signal before the abnormal control signal is received.

Through the above solution, the radio frequency transceiver 400 can control the on-off of the transmitting channel 420 and the on-off of the receiving channel 430 with the granularity of the time slot symbols. The control method is more flexible and can meet the on-off control of the transceiver channel in the 5G TDD communication system. It is also compatible with the on-off control of the transceiver channel in the 4G TDD communication system.

Based on the same concept, this application also provides a TDD communication device. As shown in FIG. 11, the communication device 1100 includes a processor 1110 and the radio frequency transceiver 400 described in any one of the foregoing possible implementation manners, wherein the processing The device 1110 is used to configure the uplink and downlink attributes of the time slot symbols in the TDD radio frame. The radio frequency transceiver 400 is coupled to the processor 1110 for generating a channel control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame. The channel control signal controls the on-off of the receiving channel and the on-off of the transmitting channel in the radio frequency transceiver 400.

Among them, the TDD communication device 1100 may be a terminal device or a network side device. For example, as shown in FIG. 12, the TDD communication device 1100 is a distributed base station. The distributed base station includes a baseband unit (BBU) and a remote radio unit (RRU). The BBU and RRU pass through Optical fiber connection, the processor 1110 and the radio frequency transceiver 400 are located in the RRU.

Based on the same concept, the present application also provides a radio frequency channel control method, which is applied to a TDD communication device, as shown in FIG. 13, the method mainly includes the following steps:

S1301: Generate a channel control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame;

S1302: Control the on-off of the receiving channel and the on-off of the transmitting channel in the TDD communication device according to the channel control signal.

Further, the uplink and downlink attributes of the time slot symbols in the TDD radio frame are determined according to the type of wireless communication service carried by the transmitting path and the type of wireless communication service carried by the receiving path.

The wireless communication service carried by the transmission path includes at least one of a communication data transmission service, a correction transmission service, and a radio frequency reflectometer FDR service, and the wireless communication service carried by the reception path includes at least one of a communication data reception service and a correction reception service. Kind.

Further, the corresponding relationship between the state of the switch and the index value is stored in the TDD communication device, where the switch is used to control the on and off of the transmission path and the on and off of the receiving path, and the index value is based on the wireless communication service carried by the transmission path. The control signal and the control signal of the wireless communication service carried by the receiving channel are determined, and the state of the switch corresponding to the index value is determined according to the wireless communication service demand and the priority of the wireless communication service carried by the transmitting channel and the wireless communication service carried by the receiving channel. At this time, the TDD communication device can specifically generate a path control signal through the following methods:

i. Generate the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the reception path according to the wireless service requirements and the uplink and downlink attributes of the time slot symbols in the TDD wireless frame;

ii. Determine the target index value according to the control signal of the wireless communication service carried by the transmitting path and the control signal of the wireless communication service carried by the receiving path;

iii. According to the target index value, search for the state of the switch corresponding to the target index value from the saved correspondence relationship;

iv. According to the state of the switch corresponding to the target index value and the control signal of the wireless communication service carried by the transmitting path and the control signal of the wireless communication service carried by the receiving path, a control signal corresponding to the switch is generated, and the control signal corresponding to the switch is the path control signal.

When the priority of the wireless communication service carried by the transmission path and the wireless communication service carried by the reception path changes, the TDD communication device can flexibly change the switches on the transmission path and the switches on the reception path by reconfiguring the stored correspondence relationship The control priority, that is, the on-off strategy of the transmission path and the on-off strategy of the receiving path can be flexibly changed, so that the TDD communication device can support more wireless communication service types, and can expand the use scenarios of the TDD communication device.

Further, the index value may be represented by an N-bit binary number, where N is the total number of wireless communication services carried by the transmission path and the wireless communication services carried by the reception path. At this time, the TDD communication device can specifically determine the target index value in the following manner: according to the correspondence between the wireless communication service carried by the transmission path and the wireless communication service carried by the reception path and each bit in the index value, the wireless communication service carried by the transmission path The control signal of the communication service and the control signal of the wireless communication service carried by the receiving path determine the value of each bit in the target index value. Among them, for any one of the wireless communication service carried by the transmission path and the wireless communication service carried by the reception path, when the control signal of the wireless communication service is at a high level, the bit corresponding to the wireless communication service in the target index value is 1. When the control signal of the wireless communication service is low, the bit corresponding to the wireless communication service in the target index value is 0; or when the control signal of the wireless communication service is low, the target index value The bit corresponding to the wireless communication service is 1, and when the control signal of the wireless communication service is at a high level, the bit corresponding to the wireless communication service in the target index value is 0.

It should be noted that the correspondence between the wireless communication services carried by the transmission path and the wireless communication services carried by the receiving path and each bit in the index value, the control signal of the wireless communication service carried by the transmission path and the wireless communication service carried by the receiving path For the control signal of the wireless communication service, the method for determining the target index value is a possible implementation method for determining the target index value, and does not limit the embodiment of the present application. Any wireless communication service that can be carried by the transmission path is controlled The signal and the control signal of the wireless communication service carried by the receiving path are converted into a method that can uniquely identify the control signal of the wireless communication service carried by the transmission path and the index value corresponding to the switch state of the control signal of the wireless communication service carried by the receiving path. In the examples of this application.

Further, the TDD communication device also transmits the valid control signal of the wireless communication service carried by the transmission path before determining the target index according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the reception path. The effective signal in the control signal of the wireless communication service carried by the signal and the receiving path is adjusted to be aligned with the position of the air interface respectively to improve the on-off of the transmitting path and the control accuracy of the receiving path.

Further, before the TDD communication device controls the on-off of the receiving path and the on-off of the transmitting path according to the control signal corresponding to the switch, it is based on the delay when the switch is switched between the on state and the off state and the The coordination response relationship between the switches and the adjustment of the control signal corresponding to the switch can further improve the on-off of the transmission path and the control accuracy of the reception path.

In addition, the TDD communication device can also adjust the path control signal according to the abnormal control signal. Specifically, the TDD communication device performs logical operations on the abnormal control signal and the path control signal, so that during the time period when the abnormal control signal is valid, the transmitting path and the receiving path respond to the abnormal control signal. After the abnormal control signal is invalid, Normally respond to the path control signal before receiving the abnormal control signal.

Through the above method, the TDD communication device can control the on and off of the transmitting channel and the on and off of the receiving channel at the granularity of the time slot symbols, and the control method is more flexible. It can not only meet the on-off control of the transceiver channel in the 5G TDD communication system, but also It is compatible with the on-off control of the transceiver channel in the 4G TDD communication system.

This application is described with reference to flowcharts and/or block diagrams of methods, equipment (systems), and computer program products according to the embodiments of this application. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are generated It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. In this way, if these modifications and variations of the embodiments of this application fall within the scope of the claims of this application and their equivalent technologies, this application is also intended to include these modifications and variations.

Claims (15)

A radio frequency transceiver for supporting time division duplex TDD communication, characterized in that it includes: a receiving path, a transmitting path, and a control circuit; The control circuit is respectively coupled to the receiving path and the transmitting path, and is used to generate a path control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame, and to control the on and off of the receiving path according to the path control signal. The on-off of the launch path. The radio frequency transceiver according to claim 1, wherein the uplink and downlink attributes of the time slot symbols in the TDD radio frame are based on the type of wireless communication service carried by the transmission path and the wireless communication service carried by the reception path The type is determined. The radio frequency transceiver according to claim 1 or 2, wherein the wireless communication service carried by the transmission path includes at least one of a communication data transmission service, a correction transmission service, and a radio frequency reflectometer FDR service. The wireless communication service carried by the channel includes at least one of a communication data receiving service and a correction receiving service. The radio frequency transceiver according to claim 2 or 3, further comprising a memory for storing the corresponding relationship between the state of the switch and the index value, wherein the switch is used for controlling the on-off and switching of the transmission path. When the receiving path is on or off, the index value is determined according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the receiving path, and the index value corresponds to the switch The status is determined according to wireless communication service requirements and the priorities of the wireless communication services carried by the transmitting path and the wireless communication services carried by the receiving path; The control circuit is specifically configured to generate the control signal of the wireless communication service carried by the transmission path and the wireless communication service carried by the receiving path according to the wireless service requirements and the uplink and downlink attributes of the time slot symbols in the TDD radio frame. Control signals for communication services; Determining a target index value according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the receiving path; Searching for the state of the switch corresponding to the target index value from the correspondence relationship according to the target index value; According to the state of the switch corresponding to the target index value, a control signal corresponding to the switch is generated, and the control signal corresponding to the switch is the path control signal. The radio frequency transceiver according to claim 4, wherein the index value is an N-bit binary number, and N is the total number of wireless communication services carried by the transmitting path and the wireless communication services carried by the receiving path; The control circuit is specifically configured to: according to the correspondence between the wireless communication service carried by the transmission path and the wireless communication service carried by the receiving path and each bit in the index value, the wireless communication carried by the transmission path The control signal of the service and the control signal of the wireless communication service carried by the receiving path, determining the value of each bit in the target index value; Wherein, for any one of the wireless communication service carried by the transmitting path and the wireless communication service carried by the receiving path, when the control signal of the wireless communication service is at a high level, the wireless communication service in the target index value The corresponding bit is 1. When the control signal of the wireless communication service is low, the bit corresponding to the wireless communication service in the target index value is 0; or, when the control signal of the wireless communication service is low Usually, the bit corresponding to the wireless communication service in the target index value is 1, and when the control signal of the wireless communication service is at a high level, the bit corresponding to the wireless communication service in the target index value is 0. The radio frequency transceiver according to claim 4 or 5, further comprising a first timing adjustment circuit, which is used for the control circuit according to the control signal of the wireless communication service carried by the transmission path and the reception path Before the target index is determined by the control signal of the wireless communication service carried, the effective signal in the control signal of the wireless communication service carried by the transmission path and the effective signal in the control signal of the wireless communication service carried by the receiving path are adjusted separately To align with the position of the air interface. The radio frequency transceiver according to any one of claims 4-6, further comprising a second timing adjustment circuit for controlling the receiving path in the control circuit according to the control signal corresponding to the switch. Before the on and off and the on and off of the emission path, the corresponding control of the switch is adjusted according to the delay when the switch is switched between the on state and the off state and the coordinated response relationship between the switches. signal. 7. The radio frequency transceiver according to any one of claims 1-7, wherein the control circuit is further configured to receive an abnormal control signal, and adjust the path control signal according to the abnormal control signal. [Corrected 15.10.2019 according to Rule 91]
A time division duplex TDD communication device, which is characterized by comprising a processor and the radio frequency transceiver according to any one of claims 1-8; The processor is configured to configure the uplink and downlink attributes of the time slot symbols in the TDD radio frame; The radio frequency transceiver is coupled to the processor, and is configured to generate a channel control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame, and control the receiving channel of the radio frequency transceiver according to the channel control signal. On-off and on-off of the launch path. A radio frequency channel control method, which applies time division duplex TDD communication equipment, is characterized in that it includes: Generate a channel control signal according to the uplink and downlink attributes of the time slot symbols in the TDD radio frame; The on-off of the receiving channel and the on-off of the transmitting channel in the TDD communication device are controlled according to the channel control signal. The method according to claim 10, wherein the uplink and downlink attributes of the time slot symbols in the TDD radio frame are based on the type of wireless communication service carried by the transmission path and the type of wireless communication service carried by the receiving path determine. The method of claim 11, wherein the corresponding relationship between the state of the switch and the index value is stored in the TDD communication device, and the switch is used to control the on-off of the transmission path and the receiving The index value is determined according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the receiving path, and the state of the switch corresponding to the index value is determined according to the wireless communication service. Communication service requirements and priority determination of wireless communication services carried by the transmission path and wireless communication services carried by the reception path; According to the uplink and downlink attributes of the time slot symbols in the TDD radio frame, the channel control signal is generated, including: Generating a control signal of the wireless communication service carried by the transmission path and a control signal of the wireless communication service carried by the receiving path according to the wireless service requirements and the uplink and downlink attributes of the time slot symbols in the TDD wireless frame; Determining a target index value according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the receiving path; Searching for the state of the switch corresponding to the target index value from the correspondence relationship according to the target index value; According to the state of the switch corresponding to the target index value, a control signal corresponding to the switch is generated, and the control signal corresponding to the switch is the path control signal. The method according to claim 12, wherein the index value is an N-bit binary number, and N is the total number of wireless communication services carried by the transmitting path and the wireless communication services carried by the receiving path; Determining the target index value according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the receiving path includes: According to the correspondence between the wireless communication service carried by the transmission path and the wireless communication service carried by the receiving path and each bit in the index value, the control signal of the wireless communication service carried by the transmission path and the reception Determining the value of each bit in the target index value for the control signal of the wireless communication service carried by the path; Wherein, for any one of the wireless communication service carried by the transmitting path and the wireless communication service carried by the receiving path, when the control signal of the wireless communication service is at a high level, the wireless communication service in the target index value The corresponding bit is 1. When the control signal of the wireless communication service is low, the bit corresponding to the wireless communication service in the target index value is 0; or, when the control signal of the wireless communication service is low Usually, the bit corresponding to the wireless communication service in the target index value is 1, and when the control signal of the wireless communication service is at a high level, the bit corresponding to the wireless communication service in the target index value is 0. The method of claim 12 or 13, further comprising: Before determining the target index according to the control signal of the wireless communication service carried by the transmission path and the control signal of the wireless communication service carried by the receiving path, the effective signal in the control signal of the wireless communication service carried by the transmission path is combined with The effective signals in the control signals of the wireless communication service carried by the receiving path are adjusted to be aligned with the positions of the air interface respectively. The method according to any one of claims 12-14, further comprising: Before controlling the on-off of the receiving path and the on-off of the transmitting path according to the control signal corresponding to the switch, according to the delay and the time when the switch is switched between the on state and the off state. The coordination response relationship between the switches is used to adjust the control signals corresponding to the switches.

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