CN116321329B - Signal switching method and device for heterogeneous network comprising 5G - Google Patents

Signal switching method and device for heterogeneous network comprising 5G Download PDF

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Publication number
CN116321329B
CN116321329B CN202211661145.7A CN202211661145A CN116321329B CN 116321329 B CN116321329 B CN 116321329B CN 202211661145 A CN202211661145 A CN 202211661145A CN 116321329 B CN116321329 B CN 116321329B
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signal
time
communication link
base station
transmitted
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CN116321329A (en
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刘碧波
张朝平
景杰
李秀文
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Shanghai Sany Electronic Technology Co ltd
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Shanghai Sany Electronic Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The application discloses a signal switching method and device of a heterogeneous network comprising 5G, wherein the method comprises the following steps: the heterogeneous network comprises signals of at least two protocol types; when the time-frequency resource of the transmission signal is larger than a preset value, switching the protocol type of the signal to be transmitted and forwarding the protocol type to the target equipment, wherein the signal to be transmitted represents a part of signals of which the time-frequency resource exceeds the preset value. By judging the communication quality of the communication link, under the condition of poor communication quality of the link, the protocol type of the signal to be transmitted is switched in time and the signal to be transmitted is forwarded to the target equipment, so that the technical problem that the real-time transmission of data cannot be ensured when resources are not interacted with resources in transmission by a base station and CPE in the scene of a communication signal blind area in the pit is solved, and the network stability of the underground equipment and the real-time performance of data transmission are ensured.

Description

Signal switching method and device for heterogeneous network comprising 5G
Technical Field
The application relates to the technical field of wireless communication, in particular to a signal switching method and device of a heterogeneous network comprising 5G.
Background
The vertical industry is one of key scenes of 5G application, namely a mine scene comprises an uphole wireless propagation environment and an underground propagation environment, wherein the uphole wireless propagation environment comprises a traditional dispatching center, various base stations, terminal equipment, switches and the like, the underground wireless propagation environment comprises various underground terminal equipment, base stations, sensors and the like, and the uphole equipment and the downhole equipment are interconnected through a ring network switch.
At present, for the intelligent mine scene, a 'one-network' mode is used for realizing communication, the access of the systems of various networks such as 5G, 4G and WIFI can be supported at the same time, various devices are connected in a wired mode generally, a large number of wired devices are unfavorable for on-site operation, and the underground environment has a scene that communication signal dead zones appear more, therefore, a better scheme is that customer premise equipment (CPE, customer Premises Equipment) is newly added between various terminal devices, the CPE is a connecting device for accessing the Internet or accessing the service of a commercial network provider, and the CPE is connected to an operator network in a direct or indirect mode, so that the intelligent mine scene has the advantages of high confidentiality, high application efficiency, convenience in maintenance and the like. However, in an actual scenario, when the base station or the CPE communicates with the terminal device, if the base station or the CPE does not have available resources for resource interaction in transmission, it is not possible to successfully send signal data to the terminal device, and it is difficult to ensure real-time transmission of the data.
Currently, there is no relevant solution and discussion.
Disclosure of Invention
The embodiment of the application provides a downlink and uplink signal switching method and device of a heterogeneous network comprising 5G, which are used for solving the technical problem that real-time transmission of data cannot be guaranteed when a base station and CPE (customer premise equipment) do not have resources for resource interaction in a scene of a communication signal blind area in the pit.
According to one aspect of the present application, there is provided a signal switching method of a heterogeneous network including 5G, the method including:
the heterogeneous network comprises signals of at least two protocol types;
when the time-frequency resource of the transmission signal is larger than a preset value, switching the protocol type of the signal to be transmitted and forwarding the signal to the target equipment, wherein the signal to be transmitted represents a signal of which the time-frequency resource exceeds the preset value.
Preferably, the switching the protocol type of the signal to be sent includes:
the protocol type of the signal to be sent is switched from a cellular network to a WIFI network;
or alternatively, the first and second heat exchangers may be,
and the protocol type of the signal to be transmitted is switched from the WIFI network to the cellular network.
Preferably, when the protocol type of the signal to be transmitted is switched from the cellular network to the WIFI network, the method includes:
judging time-frequency resources of a first communication link, wherein the first communication link is a communication link formed by a base station and terminal equipment;
if the time-frequency resource of the first communication link is smaller than a preset value, forwarding the signal to be sent to customer premises equipment.
Preferably, the step of forwarding the signal to be sent to the customer premise equipment includes:
and judging the time-frequency resource of a second communication link, wherein the second communication link is a communication link formed by the user residence equipment and the terminal equipment.
Preferably, the step of determining the time-frequency resource of the second communication link includes:
and if the time-frequency resource of the second communication link is larger than a preset value, switching the protocol type of the signal to be transmitted and forwarding the signal to target equipment.
Preferably, the step of forwarding to the target device comprises:
transmitting a control message, wherein the control message comprises configuration information for identifying the signal to be transmitted;
the control message is characterized by any one of the following forms: a network temporary identifier decoded by a preset identification format, a preset control message format for signal type identification, an increment field of a control message for signal type identification, a time domain allocation increment bit of a control message for signal type identification, a time domain offset parameter configured to be not less than 3 for signal identification.
Preferably, the step of determining the time-frequency resource of the second communication link includes:
and if the time-frequency resource of the second communication link is smaller than a preset value, reporting the signal to be sent to a base station.
Preferably, when the protocol type of the signal to be sent is switched from the WIFI network to the cellular network, the method includes:
judging the time-frequency resource of the second communication link;
If the time-frequency resource of the second communication link is smaller than the preset value, uploading the signal to be sent to a base station.
Preferably, the step of uploading the signal to be sent to the base station includes:
judging the time-frequency resource of the first communication link;
if the time-frequency resource of the first communication link is greater than a preset value, switching the protocol type of the signal to be sent and forwarding the signal to be sent with a second switching identifier to customer premises equipment
Preferably, the target device is the terminal device or the customer premises equipment;
when the target device is the terminal device, the first communication link and the second communication link are downlink communication links;
and when the target equipment is the customer premises equipment, the second communication link is an uplink communication link, and the first communication link is a downlink communication link.
As a second aspect of the present invention, there is provided a signal switching apparatus of a heterogeneous network including 5G, comprising:
the heterogeneous network comprises signals of at least two protocol types;
and the switching module is used for switching the protocol type of the signal to be transmitted and forwarding the signal to the target equipment when the time-frequency resource of the signal to be transmitted is larger than a preset value, wherein the signal to be transmitted represents a signal of which the time-frequency resource exceeds the preset value.
As a third aspect of the invention there is provided a communications apparatus comprising a processor, a memory and a computer program stored in the memory, the computer program being configured to perform the method described above when executed by the processor.
As a fourth aspect of the present invention, there is provided a storage medium having stored thereon a computer program for executing the method described in the above.
In the embodiment of the application, the signal switching method and the device for the heterogeneous network comprising the 5G are provided, by judging the communication quality of a communication link, under the condition of poor communication quality of the link, the protocol type of a signal to be sent is switched in time and the signal to be sent is forwarded to target equipment, so that the technical problem that the real-time transmission of data cannot be guaranteed when resources are not interacted between a base station and a CPE in the transmission in a scene of a dead zone of the underground communication signal is solved, and the network stability of the underground equipment and the real-time of the data transmission are guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. In the drawings:
Fig. 1 is a schematic diagram of a communication system for deploying CPE downhole according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a signal switching method of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 3 is a schematic diagram of downlink signal switching of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 4 is a schematic flow chart of a downlink signal switching method of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 5 is a schematic diagram of a first switching identifier of a downlink signal switching method of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 6 is a second flow chart of a downlink signal switching method of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 7 is an information insertion schematic diagram of a downlink signal switching method of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 8 is a schematic diagram of DCI scheduling in a downlink signal switching method of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 9 is a schematic diagram of two DCI schedules in a downlink signal switching method of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 10 is an uplink signal switching schematic diagram of a heterogeneous network including 5G according to an embodiment of the present application;
Fig. 11 is a schematic flow chart of a method for switching uplink signals of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 12 is a second flow chart of an uplink signal switching method of a heterogeneous network including 5G according to an embodiment of the present application;
fig. 13 is a schematic diagram of a signal switching apparatus including a 5G heterogeneous network according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations 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 New wireless (NR, new Radio) technology of rel.15 and rel.16 versions is mainly oriented to three typical application scenarios of enhanced mobile broadband (eMBB, enhanced Mobile Broadband), low-delay high-reliability communication (uilllc, ultra-Reliable Low-Latency Communications) and large-scale machine communication (mctc, massive Machine Type Communication), the vertical industry is one of the key application scenarios of 5G, wherein an intelligent mine is represented, the mine scenario comprises two wireless propagation environments, namely an uphole wireless propagation environment and an downhole wireless propagation environment, a scheduling center, various base stations, terminal equipment, a switch and the like are generally arranged in the uphole wireless propagation environment, various downhole terminal equipment, base stations, sensors and the like are generally arranged in the downhole wireless propagation environment, and various devices on the well and the downhole are interconnected through a ring network switch. Currently, for intelligent mine scenarios, communication is implemented by using a "one-network" manner, that is, networks supporting various protocols such as 5G, 4G and WIFI access can be simultaneously supported, but in the scenario of underground long-distance communication, when WIFI communication is used, signal dead zones easily occur, based on which, the current solution is to deploy CPE underground, fig. 1 is a schematic diagram of a communication system for deploying CPE underground, where the communication system may include at least one network device, only one base station (gNB, the next generation Node B) in fig. 1, at least one Customer Premise Equipment (CPE), only one CPE, such as CPE in fig. 1, and at least one terminal device, where the terminal device may be a mobile phone, a tablet computer, a notebook computer, a netbook, an ultra mobile personal computer, a mobile internet device, and a wearable device.
As shown in fig. 1, a base station sends a 5G or 4G signal to a terminal device, if the terminal device is far away from the base station and cannot receive the 5G or 4G signal, the base station sends the 5G or 4G signal to a CPE, and the CPE converts the 5G or 4G signal into a WIFI signal and sends the WIFI signal to the terminal device, so that the terminal device can receive the signal sent by the base station. However, in the existing scheme, when the base station or the CPE does not have available resources for resource exchange in transmission, the real-time performance of data transmission cannot be ensured.
Based on this, a signal switching method of a heterogeneous network including 5G is provided, it should be noted that the steps shown in the flowchart of the drawing may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different from that herein.
Fig. 2 is a flow chart of a signal switching method of a heterogeneous network including 5G according to an embodiment of the present application, as shown in fig. 2, the method includes the following steps:
and 101, when the time-frequency resource of the transmission signal is larger than a preset value, switching the protocol type of the signal to be transmitted and forwarding the protocol type to the target equipment, wherein the signal to be transmitted represents a part of signals of which the time-frequency resource exceeds the preset value.
By judging the communication quality of the communication link, under the condition of poor communication quality of the link, the protocol type of the signal to be transmitted is switched in time and the signal to be transmitted is forwarded to the target equipment, so that the technical problem that the real-time transmission of data cannot be ensured when resources are not interacted with resources in transmission by a base station and CPE in the scene of a communication signal blind area in the pit is solved, and the network stability of the underground equipment and the real-time performance of data transmission are ensured.
It should be noted that, in the heterogeneous network including 5G in the present application, signals of at least two protocol types are included, including but not limited to the following protocol networks: 5G, 4G, 3G, 2G, WIFI, zigbee, near Field Communication (NFC), infrared, etc. The heterogeneous network containing 5G in the application is not limited to a coal mine scene, and can also be other scenes with communication signal blind areas. In the transmission signal, if the available resources of the base station or the CPE are insufficient, the protocol types of the rest signals to be transmitted are switched in time and forwarded to the target equipment, so that the real-time performance and the reliability of data transmission are ensured.
Further, in a scenario where 4G and 5G coexist, the performance of the terminal device is set to be higher in the 5G network than in the 4G network, the terminal device may access to the 5G network preferentially, and access to the 4G network only when the energy of the 5G signal is weak or if the target scenario does not support 5G, and even if the terminal device accesses the 4G network, the terminal device still searches for the 5G signal, such as a synchronization signal, sent by the base station. And when the searched synchronization signal strength of the 5G network is higher, accessing the 5G network.
The protocol type of the signal to be sent is switched, which comprises the following steps: first case: the protocol type of the signal to be transmitted is switched from the cellular network to the WIFI network; second case: the protocol type of the signal to be transmitted is switched from the WIFI network to the cellular network. The first case usually occurs in the case of downlink transmission, the second case usually occurs in the case of uplink transmission, and the present application is further described below in terms of a method for switching downlink and uplink signals of a heterogeneous network including 5G, respectively.
Fig. 3 is a schematic diagram of switching downlink signals of a heterogeneous network including 5G according to the present application, DL in the drawing represents a downlink data link, and the downlink data link refers to a link where a base station sends signals to a terminal device.
Step 201, a signal is sent to a terminal device.
Step 202, judging whether the time-frequency resource of the first communication link is larger than a preset value.
In this step, the first communication link is a communication link composed of a base station and a terminal device, and the signal transmission direction is the base station to the terminal device. The time-frequency resource in the NR system is divided into a time-domain symbol in a time domain dimension and subcarriers in a frequency domain dimension, one subcarrier corresponds to one resource unit (RE), wherein RE is minimum resource granularity and represents a time-frequency grid point formed by one time-frequency symbol in the time domain and one subcarrier in the frequency domain, one minimum resource scheduling unit in NR is a Resource Block (RB), one RB is one time-frequency symbol in the time domain and 12 RE in the frequency domain, and the RB is the time-frequency resource block and is used for bearing signals sent to terminal equipment by a base station.
If yes, go to step 203, the base station sends a signal to the terminal device.
If not, step 204 is executed, and the base station sends a signal to be sent to the customer premise equipment CPE and includes a first switching identifier.
In this step, when the time-frequency resource of the first communication link is insufficient in the process of transmitting signals to the terminal device, the base station cannot successfully transmit signals to the terminal device, at this time, part of the signals are already transmitted to the terminal device, and part of the signals to be transmitted also exist, and the base station will transmit the signals to be transmitted to the customer premise equipment CPE and configure a first switching identifier, where the first switching identifier is used to instruct that the signals received by the terminal device are cellular network signals forwarded by the customer premise equipment CPE.
In step 2041, the CPE converts the signal to be sent and the first switching identifier into a WIFI signal, and sends the WIFI signal to the terminal device.
It should be noted that, as shown in fig. 5, the signals sent by the CPE include a conventional WIFI signal and a forwarded signal to be sent. The first switching identifier, namely 'information A' in the figure, is composed of two parts of 'information A1' and 'information A2' (A1 and A2 are not shown in the figure), the information A1 is inserted into the front end of a signal to be transmitted, the information A2 is inserted into the tail end of the signal to be transmitted, when the terminal equipment demodulates the information A1, the information received after defaulting is 5G/4G information forwarded to the terminal equipment by a base station through CPE, and when the terminal equipment demodulates the information A2, the signal to be transmitted, which is forwarded by defaulting, is already transmitted. Specifically, each of the information A1 and the information A2 occupies one or more time units (such as frames), and the occupied frequency domain resource is the frequency domain width of the current subcarrier at the maximum, and the minimum satisfies the following formula:
frequency domain resources min ＝max{BW Forwarded signal to be transmitted ,BW Conventional WIFI Signal }
Wherein BW is Forwarded signal to be transmitted Representing the frequency domain resource width, BW, of PDSCH (physical downlink shared channel) occupied by the forwarded signal to be transmitted Conventional WIFI Signal And represents the frequency domain resource width of the PDSCH occupied by transmitting the conventional WIFI signal.
In addition, considering that the modulation format or the coding rate used by the "conventional Wi-Fi signal" is different from that of the "forwarded signal to be transmitted", in order to eliminate inter-symbol interference to the maximum extent, "guard interval" needs to be inserted, which occupies one or more time units (such as frames), and the frequency domain can be the frequency domain width of the current subcarrier at the maximum, and the minimum satisfies the formula:
guard interval frequency domain resource min ＝max{BW Forwarded signal to be transmitted ,BW Conventional Wi-Fi signals }
Wherein BW is Forwarded signal to be transmitted Representing the frequency domain resource width, BW, of PDSCH occupied by the forwarded signal to be transmitted Conventional Wi-F signals And represents the frequency domain resource width of the PDSCH occupied by transmitting the conventional WIFI signal. Therefore, the terminal equipment can demodulate the forwarded signal to be transmitted more easily by adjusting the related parameters of the received signal in the guard interval.
In one embodiment, step 202 may also determine the communication quality of the first communication link through an HARQ-ACK mechanism, specifically, determine through feedback Acknowledgement (ACK) or Negative Acknowledgement (NACK) of the receiving terminal device, if the number of times of receiving the NACK reaches a preset value, determine that the quality of the first communication link is not good, and execute step 3041; if the number of times of receiving the ACK reaches the preset value, it is determined that the quality of the first communication link is good, and step 303 is performed.
Fig. 6 shows another downlink signal switching method of a heterogeneous network including 5G, and as shown in fig. 6, the signal switching method includes:
step 301, a signal is sent to a terminal device.
Step 302, determining whether the time-frequency resource of the first communication link is greater than a preset value.
In this step, the first communication link is a communication link composed of a base station and a terminal device, and the signal transmission direction is the base station to the terminal device.
If yes, go to step 303, the base station sends a signal to the terminal device.
If not, executing the following steps:
step 304, the base station sends a signal to be sent to the CPE.
Step 305, the CPE sends a signal to be sent to the terminal device.
Step 306, the CPE determines whether the time-frequency resource of the second communication link is greater than a preset value.
In this step, the second communication link refers to a communication link formed by the customer premise equipment and the terminal equipment, and the signal transmission direction is the customer premise equipment and the terminal equipment.
If yes, step 307 is executed, and the CPE sends a signal to the terminal device.
If not, executing the following steps:
step 308, the CPE uploads the signal to be transmitted.
When the time-frequency resource of the second communication link is smaller than the preset value, it indicates that the communication quality cannot be guaranteed, the CPE converts the signal to be transmitted from the WIFI network signal to the cellular network signal, and transmits the signal to the base station through the uplink data channel, for example, a PUCCH channel (physical uplink control channel) or a PUSCH channel (physical uplink data channel), which is not particularly limited in the embodiment of the present invention. After uploading, the following steps are executed:
Step 309, the base station determines whether the time-frequency resource of the first communication link is greater than a preset value.
If yes, step 310 is executed, and the base station sends a signal to be sent to the terminal device.
In this step, the base station forwards the signal to be forwarded, which is converted into the cellular network format, such as the PDSCH channel (physical downlink data channel), to the terminal device through the downlink data channel, which is not particularly limited in the embodiment of the present invention.
If not, then step 311 is performed, and the base station feeds back "no-forward" signaling to the CPE.
In this step, the "no-forward" signaling is fed back to the CPE through a downlink data channel, for example, a PDSCH channel or a PDCCH channel (physical downlink control channel), which is not specifically limited in the embodiment of the present invention.
In one embodiment, step 306 may also be performed by determining the communication quality of the second communication link, for example, by determining through an HARQ-ACK mechanism, specifically, by determining that the receiving terminal device feeds back Acknowledgement (ACK) or Negative Acknowledgement (NACK), and if the number of times of receiving the NACK reaches a preset value, determining that the quality of the first communication link is poor, and performing steps 308 to 311; if the number of times of receiving the ACK reaches the preset value, it is determined that the quality of the first communication link is good, and step 307 is performed.
It should be noted that, as shown in fig. 7, the insertion manner of the signal to be transmitted forwarded by the base station is generally that the signal to be transmitted, that is, "forwarded signal to be transmitted" is located after the normal 4G/5G signal, and considering that the modulation format or the coding rate used by the "normal 4G/5G signal" is different from the "forwarded signal to be transmitted", a "guard interval" needs to be inserted, where the guard interval occupies one or more time units (such as a time slot, a symbol or ms), and the frequency domain can be the number of RBs corresponding to the frequency domain width of the current subcarrier at the maximum, and the minimum is the number of RBs corresponding to the maximum frequency domain width occupied between the "forwarded signal to be transmitted" and the "normal 4G/5G signal". The terminal equipment can demodulate the forwarded signal to be transmitted more easily by adjusting the related parameters of the received signal in the guard interval.
In one embodiment, the regular 4G/5G signal and the signal to be transmitted may be scheduled by one or two DCIs (downlink control messages):
as shown in fig. 8, when one DCI schedule is used, the terminal device may determine whether subsequently received data contains a signal to be transmitted in the following manner:
1. network temporary identifier decoded by preset identification format
A network temporary identifier is newly defined, the cyclic redundancy check code in the PDCCH carrying the downlink control message is scrambled, and when the terminal equipment uses the network temporary identifier format to demodulate the cyclic redundancy check code and demodulate the downlink control message, the data signal received subsequently contains the signal to be transmitted.
2. Preset control message format for signal type identification
The DCI has different defined formats (formats), and a DCI format for indicating that a subsequently received data signal contains a signal to be transmitted is newly added, and after the terminal device decodes the DCI format, the subsequently received data signal defaults to contain the signal to be transmitted. In one embodiment, the DCI format may be DCI format X, which is not specifically limited in the embodiment of the present invention.
3. Increased field or time domain allocation of increased bits for control messages for signal type identification
A field or a bit is newly added in the target DCI to indicate whether a data signal subsequently received by the terminal device includes a signal to be transmitted. For example, when the newly added bit is configured to be "1", it means that the data signal subsequently received by the terminal device contains a signal to be transmitted.
4. Time domain offset parameters configured to be not less than 3 for signal recognition
The field "Time domain resource assignment" in the DCI is modified, and when at least 3 time-domain offsets are included in the configured table, the terminal device defaults to include a signal to be transmitted in a data signal to be subsequently received, where the at least 3 time-domain offsets represent a time slot and a symbol-level time-domain offset between the DCI and a conventional 4G/5G signal, and represent a time slot and a symbol-level time-domain offset between the DCI and a "forwarded signal to be transmitted", respectively.
It should be noted that, in terms of time domain, two PDSCH channels for transmitting the "normal 4G/5G signal" and the signal to be transmitted are determined by parameter start and length indication values (SLIV, start and Length Indicator Value), the time domain offset between the time slot in which the DCI is located and the time slot in which the "normal 4G/5G signal" is located depends on parameters k0 and S1, the parameter k0 is the time domain offset of the time slot-level (slot-level offset) between the time slot in which the PDCCH channel for transmitting the DCI is located and the time slot in which the PDSCH channel for transmitting the "normal 4G/5G signal" is located, and the parameter S1 is the symbol-level offset (symbol-level offset) with respect to the first symbol in the time slot in which the PDSCH channel for transmitting the "normal 4G/5G signal" is located. A slot-level (slot-level offset), defined as T1, occupies one or more time units (such as slots, symbols, or ms), and at this time, the time domain position of the slot-level (slot-level offset) of the PDSCH channel of the signal to be transmitted, transmitted by the terminal device default base station, is k0+t1; symbol-level offset (symbol-level offset) defines a parameter S2 that represents the symbol offset (symbol-level offset) relative to the first symbol in the slot in which the PDSCH channel for transmitting the "forward signal to be transmitted" is located, and in one embodiment, S2 is 0 or s2=s1. In terms of frequency domain, two PDSCH channels for transmitting the "regular 4G/5G signal" and the signal to be transmitted are decided by a parameter resource indication value (RIV, resource Indicator Value), specifically, they include starting PRB (physical resource block) positions prb0_1 and prb0_2 of two PUSCH channels defining the "regular 4G/5G signal" and the signal to be transmitted, and the number of PRBs occupied by the two PUSCH channels, LPRB1 and LPBR2. Here, it is specified that prb0_1=prb0_2, that is, the starting frequency domain positions of two PUSCH channels where the base station transmits "normal 4G/5G signal" and "forward signal to be transmitted" are the same, and for LPRB1 and LPBR2, considering that the transmitted Transport Blocks (TBs) are different, the value of LPBR2 is determined by the following two methods:
1. Modifying the RIV table, and adding the parameter LPBR2 into the RIV table;
2. a new parameter f1, which indicates a frequency domain offset between a frequency domain position corresponding to the highest PRB index occupied by the PDSCH transmitting the "normal 4G/5G signal" and a frequency domain position corresponding to the highest PRB index occupied by the PDSCH transmitting the "forward signal to be transmitted", may be positive or negative, and occupy 1 or more RBs, where lpbr2=lprb1+f1.
As shown in fig. 9, when the base station schedules a "normal 4G/5G signal" and a signal to be transmitted through two DCIs, it is possible to define one of the DCIs to schedule the "normal 4G/5G signal" and the other one of the DCIs to schedule the signal to be transmitted, for example, define the base station to schedule the "normal 4G/5G signal" through DCI1 and schedule the signal to be transmitted through DCI2, and the time domain offset between the time slot where the PDCCH channel for transmitting DCI1 is located and the time slot where the PUCCH channel for transmitting DCI2 is located is not less than 1 time slot.
The following describes the manner in which the terminal device distinguishes between DCI1 and DCI2 by taking DCI1 schedule "regular 4G/5G signal", DCI2 schedule signal to be transmitted:
1. network temporary identifier decoded by preset identification format
A network temporary identifier is newly defined, which scrambles the cyclic redundancy check code in the PDCCH channel carrying the downlink control message, and when the terminal device uses this network temporary identifier Fu Jiediao to demodulate the downlink control message, it is DCI2 by default.
2. Preset control message format for signal type identification
A specific DCI format, for example format X, is newly added, and when the terminal device decodes the target DCI into format X format, DCI2 is defaulted.
3. Increased field or time domain allocation of increased bits for control messages for signal type identification
A field or bit is added to the target DCI to indicate whether the terminal device is DCI2, and when it is a specific configuration, the terminal device defaults to DCI2. For example, when the newly added bit is configured as "1", the terminal device defaults to DCI2.
4. Bit expansion of domains for signal type identification in control information
Expanding the bit occupied by 'Identifier for DCI formats' in the existing DCI to 2 bits, and defaulting the bit to DCI2 by the terminal equipment when the bit is of a specific configuration. For example, when the field is configured to "00", it means that the DCI is used to schedule PUSCH, when the field is configured to "01", it means that the DCI is used to schedule PDSCH, and when the field is configured to "10", it is DCI2 by default.
The terminal equipment recognizes the signal to be forwarded through the two DCI scheduling modes, and the source of the signal to be forwarded is represented through the switching identification, so that the signal forwarding is facilitated, and the signal transmission is ensured.
Fig. 10 is a schematic diagram of switching uplink signals of a heterogeneous network including 5G according to the present application, where DL in the figure represents a downlink data link, and the downlink data link transmission refers to a link where a base station sends signals to a terminal device, and UL in the figure represents an uplink data link. In the present application, the uplink data link refers to a link that a terminal device sends a signal to a CPE, and the improvement of the present application is that, when a time-frequency resource of a second communication link is smaller than a preset value in an uplink signal transmission process, a signal to be sent is forwarded to a base station, and the base station sends the signal to be sent with a second switching identifier to the CPE, thereby ensuring reliability and instantaneity of uplink signal transmission. As shown in fig. 11, the uplink signal switching method of the heterogeneous network including 5G includes:
step 401, the terminal device sends an uplink signal request to the CPE.
In this step, the signal type of the uplink signal sent by the terminal device to the CPE is a WIFI network.
Step 402, determining whether the time-frequency resource of the second communication link is greater than a preset value.
In this step, the second communication link is a communication link composed of the terminal device and the CPE, and the transmission direction of the uplink signal is from the terminal device to the CPE.
In an embodiment, the executing body of step 402 may be either a terminal device or a CPE, and when the executing body is a terminal device, a mode of determining whether a time-frequency resource of the second communication link is greater than a preset value is adopted, and when the executing body is a terminal device, a channel access mechanism is adopted to determine that if the terminal device cannot preempt the target channel for multiple times, the communication quality of the second communication link is considered to be poor, and if the terminal device can access the target channel, the communication quality of the second communication link is considered to be good.
If the time-frequency resource of the second communication link is greater than the preset value, step 403 is executed, and the CPE receives the uplink signal of the terminal device.
If the time-frequency resource of the second communication link is smaller than the preset value, executing the following steps:
step 404, the CPE sends a signal forwarding request to the base station and sends a second handover identifier to the terminal device.
In this step, the CPE switches the WIFI network signal to a cellular network signal, and simultaneously sends a signal forwarding request to the base station, and sends a second switching identifier to the terminal device, where the second switching identifier is used to indicate that the terminal device can forward the uplink signal that is sent by the terminal device to the base station.
Step 405, the terminal device receives the second handover identifier and sends an uplink signal request to the base station.
In the uplink traffic scheduling process of the 4G/5G network, when the terminal device needs to send data, it needs to send a scheduling request message (SR) to the base station first, to request the base station to send an uplink grant (UL grant), where the uplink grant is used to characterize the time-frequency resource allocated to the terminal device by the base station, so that the terminal device performs uplink signal transmission. The scheduling request may be transmitted over an uplink data channel, e.g., PUSCH. The uplink grant may be transmitted through a downlink data channel, e.g., PDCCH, which is not specifically limited by the embodiments of the present invention.
Step 406, the base station receives the uplink signal request of the terminal device and sends uplink authorization.
Step 407, the terminal device receives the uplink authorization and sends an uplink signal.
In this step, the terminal device transmits a signal to be transmitted of the cellular network type on a time-frequency resource preconfigured by the base station, and performs transmission of an uplink signal.
In step 408, the base station sends the uplink signal to the CPE.
In this step, after receiving the signal to be sent, the base station switches the signal to be sent to the WIFI network type and sends the signal to be sent to the CPE, so as to complete the forwarding of the WIFI signal sent by the terminal device. It should be noted that, the process of forwarding the signal to be sent by the base station is the same as the process of the downlink signal switching method of the heterogeneous network including 5G, so that a detailed description is omitted herein.
Fig. 12 shows another uplink signal switching method of a heterogeneous network including 5G, and as shown in fig. 12, the steps of the signal switching method include:
step 501, the terminal device sends an uplink signal request to the CPE.
In this step, the signal type of the uplink signal sent by the terminal device to the CPE is a WIFI network.
Step 502, determining whether the time-frequency resource of the second communication link is greater than a preset value.
In this step, the second communication link refers to a communication link formed by the terminal device and the CPE, and the transmission direction of the uplink signal is from the terminal device to the CPE. The execution body of step 502 may be either a terminal device or a CPE, and when the execution body is a terminal device, a mode of determining whether the time-frequency resource of the second communication link is greater than a preset value is adopted, and when the execution body is a terminal device, a channel access mechanism is adopted to determine that if the terminal device cannot preempt the target channel for multiple times, the communication quality of the second communication link is considered to be poor, and if the terminal device can access the target channel, the communication quality of the second communication link is considered to be good.
If the time-frequency resource of the second communication link is greater than the preset value, step 503 is executed, and the CPE receives the uplink signal of the terminal device.
If the time-frequency resource of the second communication link is smaller than the preset value, executing the following steps:
step 504, the CPE sends a signal forwarding request to the base station and sends a second handover identifier to the terminal device.
The second switch identifier is used for indicating that the uplink signal sent by the terminal equipment can be forwarded to the base station.
Step 505, determining whether the time-frequency resource of the first communication link is greater than a preset value.
If not, then step 512 is performed, and the base station feeds back "no forward" signaling to the CPE.
If yes, the following steps are executed:
step 506, the base station feeds back "forwardable" signaling to the CPE.
Step 507, the CPE sends a second handover identifier to the terminal device.
Step 508, the terminal device sends an uplink signal request to the base station.
Step 509, the base station receives an uplink signal request from the terminal device and sends an uplink grant.
In the uplink traffic scheduling process of the 4G/5G network, when the terminal device needs to send data, it needs to send a scheduling request message (SR) to the base station first, to request the base station to send an uplink grant (UL grant), where the uplink grant is used to characterize the time-frequency resource allocated to the terminal device by the base station, so that the terminal device performs uplink signal transmission. The scheduling request may be transmitted through an uplink data channel, for example, PUSCH, and the uplink grant may be transmitted through a downlink data channel, for example, PDCCH, which is not particularly limited in the embodiment of the present invention.
Step 510, the terminal device receives the uplink grant and sends an uplink signal.
In this step, the terminal device transmits an uplink signal on the time-frequency resource allocated by the base station, so as to complete the transmission of the signal to be transmitted.
In step 511, the base station transmits the uplink signal to the CPE.
According to an embodiment of the present invention, there is further provided a signal switching device including a 5G heterogeneous network, and fig. 13 is a schematic diagram of the signal switching device including the 5G heterogeneous network provided in the embodiment of the present application, as shown in fig. 13, where the device includes:
and the switching module 10 is used for switching the protocol type of the signal to be transmitted and forwarding the signal to the target equipment when the time-frequency resource of the signal to be transmitted is larger than a preset value, wherein the signal to be transmitted represents a signal of which the time-frequency resource exceeds the preset value. The heterogeneous network comprises signals of at least two protocol types.
A first judging module 11, configured to judge the time-frequency resource of the first communication link.
A second judging module 12, configured to judge the time-frequency resource of the second communication link.
And the forwarding module 13 is used for forwarding the signal to be transmitted with the switching identification.
A control message sending module 14, configured to send a control message, where the control message includes configuration information identifying the signal to be sent, and the control message is characterized by any one of the following forms: a network temporary identifier decoded by a preset identification format, a preset control message format for signal type identification, an increment field of a control message for signal type identification, a time domain allocation increment bit of a control message for signal type identification, a time domain offset parameter configured to be not less than 3 for signal identification.
And the uploading module 15 is configured to upload the signal to be sent to the base station when the time-frequency resource of the second communication link is less than a preset value.
It should be noted that, the signal switching apparatus provided by the present embodiment including the 5G heterogeneous network is the same as the working principle of the signal switching method of the heterogeneous network including the 5G in the foregoing embodiment, so that a detailed description thereof is omitted herein.
The signal switching device of the heterogeneous network comprising 5G provided by the embodiment judges the communication quality of the communication link, timely switches the protocol type of the signal to be sent and forwards the signal to be sent to the target equipment under the condition of poor communication quality of the link, thereby solving the technical problem that the real-time transmission of data cannot be ensured when resources are not interacted between a base station and CPE in transmission in the scene of the dead zone of the underground communication signal, and further ensuring the network stability of the underground equipment and the real-time of data transmission.
According to an embodiment of the present invention, there is also provided a communication apparatus including a processor, a memory, and a computer program stored in the memory, the computer program being configured to perform the signal switching method of the heterogeneous network including 5G in the above embodiment when executed by the processor.
An embodiment of the present invention also provides a storage medium having stored thereon a computer program for executing the signal switching method of the heterogeneous network including 5G in the above embodiment.
The method executed by the computer program is the same as the method in the above method embodiment, and will not be described here again.
These computer programs may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks and/or block diagram block or blocks, and corresponding steps may be implemented in different modules.
The above-described programs may be run on a processor or may also be stored in memory (or referred to as computer-readable media), including both permanent and non-permanent, removable and non-removable media, and information storage may be implemented by any method or technique. The information may be computer readable instructions, data structures, modules of a program, or other data. The storage media of the computer includes, but is not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, read only optical disk read only memory (CD-ROM), digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium which can be used to store information that can be accessed by the computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims (7)

1. A method for switching signals of a heterogeneous network including 5G, the method comprising:
the heterogeneous network comprises signals of at least two protocol types;
when the time-frequency resource of the transmission signal is larger than a preset value, switching the protocol type of the signal to be transmitted and forwarding the protocol type to the target equipment, wherein the signal to be transmitted represents a signal part of the time-frequency resource in the transmission signal exceeding the preset value;
when the protocol type of the signal to be transmitted is switched from the cellular network to the WIFI network, the method comprises the following steps:
judging time-frequency resources of a first communication link, wherein the first communication link is a communication link formed by a base station and terminal equipment;
if the time-frequency resource of the first communication link is smaller than a preset value, forwarding the signal to be sent to user premises equipment;
the step of forwarding the signal to be sent to the customer premises equipment comprises the following steps:
Judging time-frequency resources of a second communication link, wherein the second communication link is a communication link formed by the user residence equipment and the terminal equipment;
the step of judging the time-frequency resource of the second communication link includes:
if the time-frequency resource of the second communication link is larger than a preset value, switching the protocol type of the signal to be sent and forwarding the signal to be sent with the first switching identification to the terminal equipment;
the step of forwarding to the target device comprises:
the customer premises equipment sends a control message, wherein the control message comprises configuration information for identifying the signal to be sent;
the control message is characterized by any one of the following forms: a network temporary identifier decoded by a preset identification format, a preset control message format for signal type identification, an increment field of a control message for signal type identification, a time domain allocation increment bit of a control message for signal type identification, a time domain offset parameter configured to be not less than 3 for signal identification.
2. The method of claim 1, wherein the switching the protocol type of the signal to be transmitted comprises:
the protocol type of the signal to be sent is switched from a cellular network to a WIFI network;
Or alternatively, the first and second heat exchangers may be,
and the protocol type of the signal to be transmitted is switched from the WIFI network to the cellular network.
3. The method of claim 2, wherein the step of determining the time-frequency resources of the second communication link is followed by:
if the time-frequency resource of the second communication link is smaller than a preset value, the user premise equipment uploads the signal to be sent to a base station;
the base station judges whether the time-frequency resource of the first communication link is larger than a preset value, if yes, the base station sends the signal to be sent to the terminal; if not, the base station feeds back a 'no-forwarding' signaling to the user premises equipment.
4. The method of claim 2, wherein when the protocol type of the signal to be transmitted is switched from WIFI network to cellular network, the method comprises:
judging the time-frequency resource of the second communication link;
if the time-frequency resource of the second communication link is smaller than the preset value, the user premises equipment sends a signal forwarding request to the base station and sends a second switching identification to the terminal equipment.
5. The method of claim 4, wherein the step of the customer premises equipment transmitting a signal forwarding request to the base station and a second handover identity to the terminal equipment comprises, after:
Judging the time-frequency resource of the first communication link;
if the time-frequency resource of the first communication link is greater than a preset value, the base station feeds back a forwarding signaling to the user residence equipment;
the customer premises equipment sends a second switching identification to the terminal equipment;
the terminal equipment sends an uplink signal request to a base station;
the base station receives the uplink signal request from the terminal equipment and sends uplink authorization;
the terminal equipment receives the uplink authorization and sends an uplink signal;
and the base station transmits an uplink signal to the customer premises equipment.
6. A communication device comprising a processor, a memory and a computer program stored in the memory, the computer program being configured to perform the method of any of claims 1-5 when executed by the processor.
7. A storage medium having stored thereon a computer program for performing the method of any of claims 1-5.
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