CN109842556B - Bandwidth determination method, router and terminal equipment - Google Patents
Bandwidth determination method, router and terminal equipment Download PDFInfo
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Abstract
The application discloses a bandwidth determining method, a router and terminal equipment. Wherein, the method comprises the following steps: obtaining link parameters of at least one link, wherein the link parameters comprise at least one of protocol overhead, channel occupancy rate, retransmission rate, link sending rate and link receiving rate; determining the residual bandwidth of each link according to the link parameters of the link; and sending an indication message to the terminal equipment, wherein the indication message is used for indicating the residual bandwidth of each link in the at least one link. By the aid of the method and the device, data transmission efficiency is improved, packet loss is avoided, and reliability of data transmission is improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a bandwidth determining method, a router, and a terminal device.
Background
With the development of wireless communication technology, routers are widely used, and terminal devices can perform data transmission through the routers in a wireless communication system. In the process of accessing or using a router, link access or switching is often selected, for example, because the transmission quality of a link cannot be accurately measured at the beginning of access, a link with poor quality is selected, which causes more packet loss or low throughput in the data transmission process and affects user services, and therefore, the link needs to be switched; for another example, when a certain link is disconnected or the interference is large, it needs to switch to another better link.
When selecting a link for access or switching, currently, the judgment is mainly performed according to the strength of the received signal, and then the link with strong signal strength is selected for switching, or the link which is connected last time is directly connected for access according to the memorized link information. However, the signal strength is not comparable, for example, although the signal strength corresponding to a certain link is strong, the link is busy, and obviously, it is not suitable for switching to the link; in addition, the method of directly accessing the last connected link does not consider whether the link is busy or not suitable for access. Therefore, if the link is selected for connection access or handover in the above manner, data transmission efficiency may be low, and even packet loss may occur, resulting in unreliable data transmission.
Disclosure of Invention
The embodiment of the invention provides a bandwidth determining method, a router and a terminal device, which are beneficial to improving the data transmission efficiency and avoiding packet loss, so that the reliability of data transmission is improved.
In one aspect, an embodiment of the present invention provides a bandwidth determining method, including: the router acquires link parameters of at least one link; and determining the residual bandwidth of each link according to the link parameters of the link. Wherein the link parameters may include at least one of protocol overhead, channel occupancy, retransmission rate, link transmission rate, and link reception rate. Therefore, the link for data transmission can be determined according to the remaining bandwidth, i.e. the maximum available bandwidth, of each link, for example, the link with the largest remaining bandwidth is selected for data transmission. Optionally, the router may further send an indication message to the terminal device, where the indication message is used to indicate the remaining bandwidth of each link in the at least one link, so that the terminal device can determine the link for performing data transmission according to the remaining bandwidth of each link indicated by the indication message. Therefore, the data transmission efficiency is improved, packet loss is avoided, and the reliability of data transmission is improved.
In one possible design, the router may also obtain link connection states of all links in the system, which may include a connected state and an unconnected state; wherein the at least one link may include a link of which link connection state is in a connected state among all links. That is, when acquiring the link parameters of the links, the master router may acquire only the link parameters of the links in the connected state, and further determine the remaining bandwidth of the links in the connected state, so as to select a link for data transmission from the connected links. This reduces the equipment overhead and further improves the reliability of the link selection.
In a possible design, the determining the remaining bandwidth of each link according to the link parameter of the link may specifically be: smoothing the link parameter according to a preset smoothing rule; and calculating the residual bandwidth of each link according to the link parameters of each link subjected to smoothing treatment. Thereby enabling further improvement in the reliability of link selection.
In one possible design, the remaining bandwidth may include an uplink remaining bandwidth, the at least one link being an uplink; and/or the remaining bandwidth may include a downlink remaining bandwidth, and the at least one link is a downlink.
On the other hand, an embodiment of the present invention further provides a bandwidth determining method, including: the terminal equipment receives an indication message sent by the router, wherein the indication message is used for indicating the residual bandwidth of each link in at least one link; and determining a link for data transmission from the at least one link according to the residual bandwidth of each link in the at least one link. Therefore, the data transmission efficiency is improved, packet loss is avoided, and the reliability of data transmission is improved.
In a possible design, the determining, according to the remaining bandwidth of each of the at least one link, a link for data transmission from the at least one link may specifically be: and determining the link with the largest residual bandwidth from the at least one link, and determining the link with the largest residual bandwidth as the link for data transmission. That is, the terminal device may select a link with the largest maximum available bandwidth as the remaining bandwidth from the links to perform data transmission, so as to improve the reliability of data transmission.
In one possible design, the remaining bandwidth may include an uplink remaining bandwidth, the at least one link being an uplink; and/or the remaining bandwidth may include a downlink remaining bandwidth, and the at least one link is a downlink. If the remaining bandwidth includes the uplink remaining bandwidth, the terminal device may select the link with the largest uplink remaining bandwidth for data transmission; if the residual bandwidth includes the downlink residual bandwidth, the terminal device may select the link with the largest downlink residual bandwidth for data transmission; if the remaining bandwidth indicated by the indication message includes the uplink remaining bandwidth and the downlink remaining bandwidth, the terminal device may select a link with the largest sum of the uplink remaining bandwidth and the downlink remaining bandwidth for data transmission.
In another aspect, an embodiment of the present invention further provides a router, where the router has a function of implementing a router behavior in the foregoing method example. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.
In one possible design, the router may include a processing unit and a communication unit in the structure, and the processing unit is configured to support the router to execute the corresponding functions in the above method. The communication unit is used for supporting communication between the router and other devices. The router may also include a memory unit for coupling with the processing unit that holds program instructions and data necessary for the router. As an example, the processing unit may be a processor, the communication unit may be a transceiver, and the storage unit may be a memory.
In another aspect, an embodiment of the present invention provides a terminal device, where the terminal device has a function of implementing a behavior of the terminal device in the above method example. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or modules corresponding to the above functions.
In one possible design, the terminal device includes a communication unit and a processing unit in the structure, and the processing unit is configured to support the terminal device to execute the corresponding functions in the method. The communication unit is used for supporting communication between the terminal equipment and other equipment. The terminal device may further comprise a memory unit for coupling with the processing unit, which stores program instructions and data necessary for the terminal device. As an example, the processing unit may be a processor, the communication unit may be a transceiver, and the storage unit may be a memory.
In still another aspect, an embodiment of the present invention provides a communication system, where the system includes the router and/or the terminal device in the foregoing aspect. In another possible design, the system may further include other devices interacting with the router or the terminal device in the solution provided in the embodiment of the present invention.
In still another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the router, which includes a program designed to execute the above aspects.
In still another aspect, an embodiment of the present invention provides a computer storage medium for storing computer software instructions for the terminal device, which includes a program designed to execute the above aspect.
In yet another aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of the above aspects.
In yet another aspect, the present application provides a system on a chip comprising a processor for enabling a router to implement the functions referred to in the above aspects, e.g. to generate or process data and/or information referred to in the above methods. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the router. The chip system may be formed by a chip, or may include a chip and other discrete devices.
In yet another aspect, the present application provides a chip system comprising a processor for enabling a terminal device to implement the functions referred to in the above aspects, e.g. to receive or process data and/or information referred to in the above methods. In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the terminal device. The chip system may be formed by a chip, or may include a chip and other discrete devices.
In the technical solution claimed in the present application, the router can determine the remaining bandwidth of the link by obtaining link parameters such as protocol overhead, channel occupancy, retransmission rate, link sending rate, link receiving rate, and the like of the link, so as to select a link for data transmission from the link according to the link bandwidth of the link, which is helpful to improve data transmission efficiency, avoid packet loss, and thus improve reliability of data transmission.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the embodiments or the background art of the present invention will be described below.
Fig. 1 is an application scenario diagram of a communication system according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a bandwidth determining method according to an embodiment of the present invention;
fig. 3 is a schematic flowchart of another bandwidth determining method according to an embodiment of the present invention;
fig. 4 is an interaction diagram of a bandwidth determination method according to an embodiment of the present invention;
fig. 5a is a schematic diagram of a physical layer packet transmission timing structure according to an embodiment of the present invention;
fig. 5b is a schematic diagram of another physical layer packet transmission timing structure according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a router according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another router provided in the embodiment of the present invention;
fig. 8 is a schematic structural diagram of another router provided in an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another terminal device provided in the embodiment of the present invention;
fig. 11 is a schematic structural diagram of another terminal device according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described below with reference to the drawings.
In this application, a terminal device is a device with communication functionality, which may also be referred to as a terminal, and may include a handheld device with wireless communication functionality, a vehicle mounted device, a wearable device, a computing device or other processing device connected to a wireless modem, etc. The user devices may be called different names in different networks, for example: a terminal, UE, mobile station, subscriber unit, station, cellular telephone, personal digital assistant, wireless modem, wireless communication device, handheld device, laptop computer, cordless telephone, wireless local loop station, or the like. The user equipment may be a wireless terminal or a wired terminal. The wireless terminal may refer to a device that provides voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem, to name a few.
Referring to fig. 1, fig. 1 is a block diagram of a communication system according to an embodiment of the present invention. Specifically, as shown in fig. 1, the communication system may include a terminal device, a master router, and at least one slave router. Multiple links generally exist among the terminal device, the slave router and the master router, multiple links exist correspondingly if networking modes are different, and when information transmission is needed, the links need to be selected from the multiple links for information transmission. For example, the networking modes of the router include Wireless Fidelity (Wi-Fi), 2.4G networking, 5G networking, PLC networking, and the like, and each networking mode may correspond to at least one link.
In this application, the link referred to may refer to an uplink, and may also refer to a downlink.
The application discloses a bandwidth determining method, a router and a terminal device, which are beneficial to improving data transmission efficiency and avoiding packet loss, so that the reliability of data transmission is improved. The details are described below.
Referring to fig. 2, fig. 2 is a schematic flow chart of a bandwidth determining method according to an embodiment of the present invention. Specifically, as shown in fig. 2, the bandwidth determining method according to the embodiment of the present invention may include the following steps:
201. link parameters of at least one link are obtained, and the link parameters comprise at least one of protocol overhead, channel occupancy rate, retransmission rate, link sending rate and link receiving rate.
Specifically, the technical solution of the embodiment of the present invention may be specifically applied to a router, or may be applied to other independent devices in a communication system, and the embodiment of the present invention is not limited. Optionally, the router may be a master router in the communication system, or may be a slave router in the communication system. The following description will be made by taking the master router as an example.
202. And determining the residual bandwidth of each link according to the link parameters of the link.
Specifically, after obtaining link parameters such as protocol overhead, channel occupancy rate, retransmission rate, link sending rate and/or link receiving rate of each link, the main router may determine the remaining bandwidth of each link, that is, the maximum available bandwidth, according to the link parameters, so as to select a link from each link according to the remaining bandwidth for data transmission, so as to improve reliability of link selection, and further improve communication reliability.
Optionally, when determining the remaining bandwidth of the link, smoothing may be performed on the link parameter, and then the remaining bandwidth of the link is calculated according to the smoothed link parameter, so as to further improve the reliability of link selection.
203. And sending an indication message to the terminal equipment, wherein the indication message is used for indicating the residual bandwidth of each link in the at least one link.
Optionally, after determining the remaining bandwidth of each link, the master router may send an indication message for indicating the remaining bandwidth of each link to the terminal device, or the master router sends a message for indicating the remaining bandwidth of each link to the slave router, and then the slave router sends the message for indicating the remaining bandwidth of each link to the terminal device, for example, the indication message indicates, which is not limited in the present application.
Further optionally, before obtaining the link parameters of at least one link, the master router may further obtain link connection states of all links in the system, where the link connection states include a connected state and an unconnected state; wherein the at least one link includes a link of which link connection state is in a connected state among all links. That is to say, when acquiring the link parameters of the links, the master router may acquire only the link parameters of the links in the connected state, but does not need to acquire the link parameters of the links in the unconnected state, and then selects a link for data transmission from the connected links, which reduces the overhead of the device and further improves the reliability of link selection.
Optionally, the remaining bandwidth may include an uplink remaining bandwidth, and then the at least one link is an uplink; and/or, the remaining bandwidth may include a downlink remaining bandwidth, and the at least one link is a downlink.
In the embodiment of the present invention, the router can determine the remaining bandwidth of the link by obtaining link parameters such as protocol overhead, channel occupancy, retransmission rate, link sending rate, link receiving rate, and the like of the link, and can send an indication message for indicating the remaining bandwidth to the terminal device, so that the terminal device can select a link for data transmission according to the remaining bandwidth, which is helpful for improving reliability of link selection, improving data transmission efficiency, avoiding packet loss, and thus improving reliability of data transmission.
Referring to fig. 3, fig. 3 is a schematic flowchart of another bandwidth determining method according to an embodiment of the present invention. Specifically, the technical scheme of the embodiment of the invention can be specifically applied to terminal equipment. As shown in fig. 3, the bandwidth determining method according to the embodiment of the present invention may include the following steps:
301. and receiving an indication message sent by the router, wherein the indication message is used for indicating the residual bandwidth of each link in at least one link.
Optionally, the indication message may be sent by the master router to the terminal device, or may be sent by the slave router to the terminal device, for example, each slave router may send its own remaining bandwidth to the terminal device, and the like, which is not limited in this application.
302. And determining a link for data transmission from the at least one link according to the residual bandwidth of each link in the at least one link.
Optionally, the determining, by the terminal device, a link for data transmission from the at least one link according to the remaining bandwidth of each link in the at least one link may specifically be: and determining the link with the largest residual bandwidth from the at least one link, and determining the link with the largest residual bandwidth as the link for data transmission. That is, the terminal device may select a link with the largest remaining bandwidth from the remaining bandwidth, i.e., the maximum available bandwidth, of each link for data transmission, thereby improving the reliability of data transmission. Or, further optionally, the terminal device may further perform link selection according to the remaining bandwidth of each link, in combination with the service priority of the data that needs to be currently transmitted; for example, for data of a first priority, the terminal device may select a link with the largest remaining bandwidth for data transmission, and for data of a second priority, the terminal device may select a link with the second highest remaining bandwidth for data transmission, and so on, which is not limited in the embodiment of the present invention. Wherein the first priority is higher than the second priority.
Optionally, the remaining bandwidth may include an uplink remaining bandwidth, and then the at least one link is an uplink; and/or, the remaining bandwidth may include a downlink remaining bandwidth, and the at least one link is a downlink. Specifically, if the remaining bandwidth includes the uplink remaining bandwidth, the terminal device may select the link with the largest uplink remaining bandwidth for data transmission, that is, the uplink is prioritized; if the residual bandwidth includes the downlink residual bandwidth, the terminal device may select the link with the largest downlink residual bandwidth for data transmission, that is, downlink priority; if the remaining bandwidth includes an uplink remaining bandwidth and a downlink remaining bandwidth, the terminal device may select a link with the largest sum of the uplink remaining bandwidth and the downlink remaining bandwidth for data transmission.
In the embodiment of the present invention, the terminal device can select the link for data transmission according to the remaining bandwidth by obtaining the remaining bandwidth corresponding to each link, for example, receiving an indication message sent by the router to indicate the remaining bandwidth of each link, which is helpful to improve the reliability of link selection, improve the data transmission efficiency, avoid packet loss, and thus improve the reliability of data transmission.
Referring to fig. 4, fig. 4 is an interaction diagram of another bandwidth determining method according to an embodiment of the present invention. Specifically, as shown in fig. 4, the bandwidth determining method according to the embodiment of the present invention may include the following steps:
401. the router acquires the link connection state of all links in the system.
402. The router acquires link parameters of at least one link of which the link connection state is in a connected state.
Wherein the link connection state may include a connected state and an unconnected state. Optionally, the master router may detect the connection state of the links in real time, and may only screen out the links whose connection states are in the connected state, and further select a link from the connected links, so as to reduce the device overhead.
Further optionally, the at least one link may include all links in a connected state. Alternatively, some links may be further filtered out from all the links in the connected state in combination with other parameters, for example, by obtaining the signal strength and further filtering out links with the signal strength higher than a preset strength threshold from all the links in the connected state, and so on, which are not listed here.
403. The router carries out smoothing processing on the link parameters according to a preset smoothing processing rule, and calculates the residual bandwidth of each link according to the link parameters of each link after smoothing processing.
Optionally, the link parameters may include parameters such as protocol overhead, channel occupancy, retransmission rate, link transmission rate, and link reception rate of the link. Further, after obtaining each link parameter, the obtained link parameter may be further smoothed according to a preset smoothing rule, for example, in a manner of taking an average value or in a manner of alpha filtering, and the smoothing manner is not limited in this application. For example, taking an average smoothing method as an example, the link physical transmit/receive rate may be sampled by a period T, and the latest n times of results are counted, and assuming that the sampling results are the receive rate Rrate (1), Rrate (2), …, Rrate (n), transmit rate Trate (1), Trate (2), …, and Trate (n), the link physical receive rate after smoothing may be:
the physical transmission rate of the link after the smoothing process may be:
further, for the channel occupancy (utilization) rate such as Wi-Fi channel occupancy of a link in a Wi-Fi networking mode, assuming that the channel occupancy sampling result Utility (1), Utility (2), …, Utility (n) is sampled by a period T, the Wi-Fi channel occupancy after the smoothing process may be:
further, for the retransmission rate of the link, assuming that the retransmission rate sampling result R (1), R (2), …, R (n) of the channel through periodic T sampling, the retransmission rate after the smoothing process may be:
further, the main router can calculate the protocol overhead of the link, and the protocol overhead of different wireless communication protocols is different. For example, taking the theoretical protocol overhead of 802.11n as an example, as shown in fig. 5a and 5b, the diagrams are physical transmission time structures in different scenarios, respectively. Let T denote the transmission time of the entire phy packet, which is T1+ T2, where:
wherein the payload rate is:
let α be the protocol overhead:
wherein L ispktSpecifically, the packet size is obtained by analyzing the packet capturing data. For example, when the original packet length is 512bytes, the aggregation rule of the number of aggregation packets is as follows: MCS0-MCS3 are aggregated for a fixed length of time, about 1.8 ms; the total number of MCS4-MCS7 aggregates is about 24, and when different MCS orders can be calculatedThereby estimating the payload packet size. L isM+LThe packet header size of the aggregated Media Access Control (abbreviated MAC) and Logical Link Control (abbreviated LLC) can be obtained, and the MAC layer and LLC overhead of each MAC packet can be found to be 94bytes according to the packet capture data analysis, while the chip algorithm divides the payload into MAC layer packets whose number is about 2/3 times the number of original packets, and the estimation result is shown in table one below. RphyAnd may be the physical layer rate, as shown in table one below. T ispreThe time of the physical layer preamble may be, for example, 36us for the single stream preamble according to the 802.11n protocol. T isbackoffThe time may be a backoff time, and may be specifically determined by a service type issued by the packet data analysis AP, for example, the service in T1 in fig. 5a and 5b is VI service, that is, TVIbackoffIn T2 in FIGS. 5a and 5b, the BE service is TBEbackoff(ii) a According to the 802.11n protocol, the average time of the AC _ VI backoff may BE estimated to BE 70us, and the average time of the AC _ BE backoff may BE 115us, which are not listed here. T isBAThe time of the Block ACK frame may be, for example, from the packet capture data analysis, the data transmission time of the Block ACK frame is 32 × 8/24 about 11us in this scenario, plus the preamble time 36us, and the time of one SIFS 16us, and the entire BA frame time is about 63 us. T issifsShort span, 16us in this scenario according to the 802.11n protocol. T isRTS/CTSTime for starting RTS/CTS (Request To Send/Clear To Send) listening, which includes RTS data transmission time 20 × 8/12 about 13us, plus a preamble and a SIFS time about 65us in this scenario; CTS data transmission time is about 14 × 8/12 about 9us, plus preamble and a SIFS time of 61us, so the total time consumed to start RTS/CTS is about 126 us. T isTCP ACKI.e. L in the above formulaTCPACK_ktThe time for feeding back the TCP ACK and the contention channel time for the STA can be obtained from packet capturing data analysis, and the TCP ACK time can be shown in table one corresponding to different MCSs.
Further, the STA side, such as the terminal device, also has a SIFS 16us, BA 57us, RTS/CTS 126us, and physical layer preamble time 36us, which are 360 us. The data transmission time is different according to different TCP layer packets, and if the number of the packets is n, the transmission time is (100 × 8/216) × n us.
Watch 1
Further, after calculating the parameters of each link, the master router may calculate the remaining bandwidth of each link, that is, calculate the maximum available bandwidth of each link. The remaining bandwidth may include an uplink remaining bandwidth and/or a downlink remaining bandwidth. For example, the uplink residual bandwidth BWuCan be as follows:
BWu＝(1-α)*Rr*(1-R)*(1-U)
the downlink residual bandwidth BWdCan be as follows:
BWd＝(1-α)*Rt*(1-R)*(1-U)
404. the router sends an indication message to the terminal device, wherein the indication message is used for indicating the residual bandwidth of each link in the at least one link.
Optionally, the master router may send information that determines each remaining bandwidth to the corresponding slave router, and the slave routers may maintain the remaining bandwidth of the corresponding link, for example, in a form of a list, and may send the information of the remaining bandwidth to the terminal device.
405. And the terminal equipment determines the link with the maximum residual bandwidth from the at least one link according to the indication message, and determines the link with the maximum residual bandwidth as the link for data transmission.
Specifically, after acquiring the information of the remaining bandwidth of each link, the terminal may select the link with the largest remaining bandwidth from the links as the link currently used for data transmission, so as to improve data transmission efficiency and reliability. For example, if the uplink priority principle is adopted, the terminal device may select a link with the largest uplink remaining bandwidth for data transmission (in this case, the indication message may indicate the uplink remaining bandwidth, and may also indicate the uplink remaining bandwidth and the downlink remaining bandwidth); if a downlink priority principle is adopted, the terminal device may select a link with the largest downlink remaining bandwidth for data transmission (at this time, the indication message may indicate the downlink remaining bandwidth, or may indicate the uplink remaining bandwidth and the downlink remaining bandwidth); or, the indication message may indicate the sum of the uplink remaining bandwidth and the downlink remaining bandwidth, and the terminal device may select the link with the largest remaining bandwidth indicated by the indication message for data transmission; or, if the indication message indicates the uplink remaining bandwidth and the downlink remaining bandwidth, the terminal device may select a link with the largest sum of the uplink remaining bandwidth and the downlink remaining bandwidth for data transmission, and the like.
Optionally, the indication message may further include link information corresponding to the remaining bandwidth, such as a master-slave router identifier, so as to facilitate the terminal device to perform data transmission after selecting the link, thereby improving data transmission efficiency.
Further optionally, if the environmental interference becomes large or the wireless networking is disconnected (becomes an unconnected state), the router may further perform full channel scanning, evaluate link information corresponding to the maximum available bandwidth, and send the link information to the terminal device, so that the terminal device may change a link (or may be referred to as a handover channel) according to the link information corresponding to the maximum available bandwidth, that is, change the current link to a link indicated by the link information corresponding to the maximum available bandwidth.
In the embodiment of the present invention, the router may determine the remaining bandwidth of the link by obtaining link parameters such as protocol overhead, channel occupancy, retransmission rate, link sending rate, link receiving rate, and the like of the link, and may send an indication message for indicating the remaining bandwidth to the terminal device, so that the terminal device may select a link for data transmission according to the remaining bandwidth by obtaining the remaining bandwidth corresponding to each link, for example, receiving the indication message for indicating the remaining bandwidth of each link, sent by the router. According to the technical scheme of the embodiment of the invention, the maximum available bandwidth of the link can be finally calculated by comprehensively considering the use conditions of the wireless channel, including the transceiving rate, the channel occupancy rate and the like, the retransmission condition caused by interference in the current environment, the expenses of different wireless communication protocols, namely the protocol expenses and the like, so that the terminal equipment can select the link according to the maximum available bandwidth of each link, the reliability of link selection can be favorably improved, the data transmission efficiency can be improved, the packet loss can be avoided, and the reliability of data transmission can be improved.
The above method embodiments are all illustrations of the bandwidth determining method of the present application, and descriptions of various embodiments have respective emphasis, and reference may be made to relevant descriptions of other embodiments for parts that are not described in detail in a certain embodiment.
Fig. 6 shows a schematic diagram of a possible structure of the router involved in the above embodiment, and referring to fig. 6, the router 600 may include: a processing unit 601 and a communication unit 602. These units may perform the corresponding functions of the router in the above method example, for example, the processing unit 601 is configured to obtain link parameters of at least one link, where the link parameters include at least one of protocol overhead, channel occupancy, retransmission rate, link transmission rate, and link reception rate; the processing unit 601 is further configured to determine a remaining bandwidth of each link according to the link parameter of the link; a communication unit 602, configured to send an indication message to a terminal device, where the indication message is used to indicate a remaining bandwidth of each of the at least one link.
Optionally, the processing unit 601 may be further configured to obtain link connection states of all links in the system, where the link connection states include a connected state and an unconnected state. Wherein the at least one link includes a link of which link connection state is in a connected state among all links.
Optionally, the processing unit is specifically configured to perform smoothing processing on the link parameters according to a preset smoothing processing rule, and calculate the remaining bandwidth of each link according to the link parameters of each link after the smoothing processing.
Optionally, the remaining bandwidth includes an uplink remaining bandwidth, and the at least one link is an uplink; and/or the residual bandwidth comprises downlink residual bandwidth, and the at least one link is a downlink.
It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation. Each functional unit in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
In the case of an integrated unit, fig. 7 shows another possible structural diagram of the router involved in the above embodiment, and as shown in fig. 7, the router 700 may include: a processing unit 702 and a communication unit 703. The processing unit 702 may be configured to control and manage the actions of the router, for example, the processing unit 702 may be configured to support the router to perform the processes 201 and 203 in fig. 2, 401 and 404 in fig. 4, and the like, and/or other processes for the techniques described herein. The communication unit 703 is used to support communication between the router and other network entities, for example, the functional units or network entities shown in fig. 2 to 6, such as terminal devices. The router may further include a storage unit 701 for storing program codes and data of the router.
The Processing Unit 702 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 703 may be a transceiver, or may be a receiver and a transmitter provided separately. The memory unit 701 may be a memory.
When the processing unit 702 is a processor, the communication unit 703 is a transceiver, and the storage unit 701 is a memory, the router according to the embodiment of the present invention may be the router shown in fig. 8.
Referring to fig. 8, the router 8 may include: a processor 802, a transceiver 803, a memory 801, and a bus 804. The transceiver 803, the processor 802 and the memory 801 are connected to each other via a bus 804; the bus 804 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a router. Of course, the processor and the storage medium may reside as discrete components in a router.
Fig. 9 shows a schematic diagram of a possible structure of the terminal device involved in the foregoing embodiment, and referring to fig. 9, the terminal device 900 may include: a communication unit 901 and a processing unit 902. The units may perform corresponding functions of the terminal device in the above method example, for example, the communication unit 901 is configured to receive an indication message sent by the router, where the indication message is used to indicate a remaining bandwidth of each of the at least one link; a processing unit 902, configured to determine, according to a remaining bandwidth of each of the at least one link, a link for data transmission from the at least one link.
Optionally, the processing unit 902 may be specifically configured to determine, from the at least one link, a link with the largest remaining bandwidth, and determine the link with the largest remaining bandwidth as a link for data transmission.
Optionally, the remaining bandwidth includes an uplink remaining bandwidth, and the at least one link is an uplink; and/or the residual bandwidth comprises downlink residual bandwidth, and the at least one link is a downlink.
It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation. Each functional unit in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
In the case of using an integrated unit, fig. 10 shows another possible structural diagram of the terminal device involved in the foregoing embodiment, and as shown in fig. 10, the terminal device 1000 may include: a processing unit 1002 and a communication unit 1003. The processing unit 1002 may be configured to control and manage actions of the terminal device, for example, the processing unit 1002 may be configured to support the terminal device to perform the processes 301 and 302 in fig. 3, the process 405 in fig. 4, and/or the like, and/or other processes for the techniques described herein. The communication unit 1003 is used to support communication between the terminal device and other network entities, for example, the functional units or network entities shown in fig. 2 to 9. The terminal device may further include a storage unit 1001 for storing program codes and data of the terminal device.
The Processing Unit 1002 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 1003 may be a transceiver, or may be a receiver and a transmitter provided separately. The storage unit 1001 may be a memory.
When the processing unit 1002 is a processor, the communication unit 1003 is a transceiver, and the storage unit 1001 is a memory, the terminal device according to the embodiment of the present invention may be the terminal device shown in fig. 11.
Referring to fig. 11, the terminal device 1100 may include: a processor 1102, a transceiver 1103, a memory 1101, and a bus 1104. Wherein the transceiver 1103, the processor 1102 and the memory 1101 are connected to each other by a bus 1104; the bus 1104 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 11, but this is not intended to represent only one bus or type of bus.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a terminal device. Of course, the processor and the storage medium may reside as discrete components in a terminal device.
In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.
It should also be understood that reference herein to first, second, third, fourth, and various numerical designations is made merely for convenience in description and is not intended to limit the scope of embodiments of the invention.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Those of ordinary skill in the art will appreciate that the various illustrative logical blocks and steps (step) described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, user equipment, functional entity and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application.
Claims (15)
1. A method for bandwidth determination, comprising:
obtaining link parameters of at least one link, wherein the link parameters comprise protocol overhead, channel occupancy rate and retransmission rate, and the link parameters further comprise at least one of link sending rate and link receiving rate;
determining the residual bandwidth of each link according to the link parameters of the link;
sending an indication message to a terminal device, where the indication message is used to indicate a remaining bandwidth of each link in the at least one link;
the residual bandwidth comprises an uplink residual bandwidth and/or a downlink residual bandwidth, and the calculation mode of the uplink residual bandwidth is as follows: BW (Bandwidth)u(1- α) × (R) × (1-U); the calculation mode of the downlink residual bandwidth is as follows: BW (Bandwidth)d(1- α) × Rt (1-R) × (1-U); alpha is protocol overhead, Rr is link receiving rate, Rt is link sending rate, R is retransmission rate, and U is channel occupancy rate.
2. The method of claim 1, further comprising:
acquiring link connection states of all links in a system, wherein the link connection states comprise a connected state and an unconnected state;
wherein the at least one link includes a link of which link connection state is in a connected state among all links.
3. The method of claim 2, wherein determining the remaining bandwidth of each link based on the link parameters of the link comprises:
smoothing the link parameters according to a preset smoothing rule;
and calculating the residual bandwidth of each link according to the link parameters of each link subjected to smoothing treatment.
4. The method of any of claims 1-3, wherein the remaining bandwidth comprises an uplink remaining bandwidth, and wherein the at least one link is an uplink; and/or the presence of a gas in the gas,
the residual bandwidth comprises downlink residual bandwidth, and the at least one link is a downlink.
5. A method for bandwidth determination, comprising:
receiving an indication message sent by a router, wherein the indication message is used for indicating the residual bandwidth of each link in at least one link;
determining a link for data transmission from the at least one link according to the remaining bandwidth of each link in the at least one link;
the residual bandwidth comprises an uplink residual bandwidth and/or a downlink residual bandwidth, and the calculation mode of the uplink residual bandwidth is as follows: BW (Bandwidth)u(1- α) × (R) × (1-U); the calculation mode of the downlink residual bandwidth is as follows: BW (Bandwidth)d(1- α) × Rt (1-R) × (1-U); alpha is protocol overhead, Rr is link receiving rate, Rt is link sending rate, R is retransmission rate, and U is channel occupancy rate.
6. The method of claim 5, wherein the determining the link for data transmission from the at least one link according to the remaining bandwidth of each of the at least one link comprises:
and determining the link with the largest residual bandwidth from the at least one link, and determining the link with the largest residual bandwidth as the link for data transmission.
7. The method of claim 5 or 6, wherein the remaining bandwidth comprises an uplink remaining bandwidth, and wherein the at least one link is an uplink; and/or the presence of a gas in the gas,
the residual bandwidth comprises downlink residual bandwidth, and the at least one link is a downlink.
8. A router, comprising: a processing unit and a communication unit;
the processing unit is configured to obtain link parameters of at least one link, where the link parameters include protocol overhead, channel occupancy, and retransmission rate, and the link parameters further include at least one of a link sending rate and a link receiving rate;
the processing unit is further configured to determine a remaining bandwidth of each link according to the link parameter of the link;
the communication unit is configured to send an indication message to a terminal device, where the indication message is used to indicate a remaining bandwidth of each link in the at least one link;
the residual bandwidth comprises an uplink residual bandwidth and/or a downlink residual bandwidth, and the calculation mode of the uplink residual bandwidth is as follows: BW (Bandwidth)u(1- α) × (R) × (1-U); the calculation mode of the downlink residual bandwidth is as follows: BW (Bandwidth)d(1- α) × Rt (1-R) × (1-U); alpha is protocol overhead, Rr is link receiving rate, Rt is link sending rate, R is retransmission rate, and U is channel occupancy rate.
9. The router according to claim 8,
the processing unit is further configured to acquire link connection states of all links in the system, where the link connection states include a connected state and an unconnected state;
wherein the at least one link includes a link of which link connection state is in a connected state among all links.
10. The router according to claim 9,
the processing unit is specifically configured to perform smoothing processing on the link parameters according to a preset smoothing processing rule, and calculate the remaining bandwidth of each link according to the link parameters of each link subjected to smoothing processing.
11. The router according to any of claims 8-10, wherein the residual bandwidth comprises an uplink residual bandwidth, and wherein the at least one link is an uplink; and/or the presence of a gas in the gas,
the residual bandwidth comprises downlink residual bandwidth, and the at least one link is a downlink.
12. A terminal device, comprising: a communication unit and a processing unit;
the communication unit is configured to receive an indication message sent by a router, where the indication message is used to indicate a remaining bandwidth of each link in at least one link;
the processing unit is configured to determine, according to a remaining bandwidth of each link in the at least one link, a link for data transmission from the at least one link;
the residual bandwidth comprises an uplink residual bandwidth and/or a downlink residual bandwidth, and the calculation mode of the uplink residual bandwidth is as follows: BW (Bandwidth)u(1- α) × (R) × (1-U); the calculation mode of the downlink residual bandwidth is as follows: BW (Bandwidth)d(1- α) × Rt (1-R) × (1-U); alpha is protocol overhead, Rr is link receiving rate, Rt is link sending rate, R is retransmission rate, and U is channel occupancy rate.
13. The terminal device of claim 12,
the processing unit is specifically configured to determine, from the at least one link, a link with the largest remaining bandwidth, and determine the link with the largest remaining bandwidth as a link for data transmission.
14. The terminal device according to claim 12 or 13, wherein the remaining bandwidth comprises an uplink remaining bandwidth, and the at least one link is an uplink; and/or the presence of a gas in the gas,
the residual bandwidth comprises downlink residual bandwidth, and the at least one link is a downlink.
15. A computer storage medium, characterized in that the computer storage medium stores computer software instructions which, when executed by a computer, implement the method according to any one of claims 1-7.
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| CN110446234B (en) * | 2019-06-24 | 2021-01-29 | 华为技术有限公司 | Communication method, device and system for master-slave hybrid networking |
| CN113259248B (en) * | 2020-02-07 | 2023-03-10 | 华为技术有限公司 | Method and device for determining link for forwarding service flow |
| MX2022009685A (en) | 2020-02-07 | 2022-11-16 | Huawei Tech Co Ltd | Method and apparatus for determining link forwarding service flow. |
| CN113950098B (en) * | 2020-07-15 | 2024-06-18 | 华为技术有限公司 | AP equipment networking method, AP equipment and system |
| CN113114521B (en) * | 2021-02-24 | 2022-10-04 | 浙江大华技术股份有限公司 | Link quality judging method, network camera and readable storage medium |
| CN113347067B (en) * | 2021-08-04 | 2021-10-29 | 苏州浪潮智能科技有限公司 | Bandwidth determination method, device and equipment for PCIe signal |
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