CN113630210B - Method, device and related equipment for improving transmission efficiency of Mesh link - Google Patents
Method, device and related equipment for improving transmission efficiency of Mesh link Download PDFInfo
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- CN113630210B CN113630210B CN202010386623.2A CN202010386623A CN113630210B CN 113630210 B CN113630210 B CN 113630210B CN 202010386623 A CN202010386623 A CN 202010386623A CN 113630210 B CN113630210 B CN 113630210B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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Abstract
The application provides a method, a device and related equipment for improving Mesh link transmission efficiency, wherein the method is applied to a sending node in a wireless Mesh network, and comprises the following steps: determining a current Channel Quality Indicator (CQI); judging whether the current CQI is greater than a preset CQI threshold or not; if so, distributing physical transmission resources according to a first resource distribution mode, and updating the mode switching identifier, wherein in the first resource distribution mode, a first OFDM symbol of each subframe in each wireless frame is used as the available physical transmission resources of a physical control channel; if not, the physical transmission resources are distributed according to a second resource distribution mode, and the mode switching identifier is updated, under the second resource distribution mode, the first N OFDM symbols of each subframe in each wireless frame are all used as the available physical transmission resources of the physical control channel, and N is an integer greater than 1. In the application, the Mesh link transmission efficiency can be improved through the above mode.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a related device for improving transmission efficiency of a Mesh link.
Background
The wireless Mesh network is a new wireless network architecture completely different from the traditional wireless cellular network. In the wireless Mesh network, nodes are all peer-to-peer, each node can send and receive signals, and each node can communicate with one or more peer-to-peer nodes. Compared with the traditional cellular network, the wireless Mesh network has the obvious advantages of flexible and simple networking, high network reliability, large coverage range and the like, and is particularly suitable for private network trunking communication.
On the basis that the wireless Mesh network has multiple advantages, how to further improve the transmission efficiency of the Mesh link becomes a research target.
Disclosure of Invention
In order to solve the foregoing technical problems, embodiments of the present application provide a method, an apparatus, and a related device for improving transmission efficiency of a Mesh link, so as to achieve the purpose of improving transmission efficiency of the Mesh link, and the technical scheme is as follows:
a method for improving Mesh link transmission efficiency is applied to a sending node in a wireless Mesh network, and comprises the following steps:
determining a current Channel Quality Indicator (CQI);
judging whether the current CQI is greater than a preset CQI threshold or not;
if so, allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier, wherein in the first resource allocation mode, a first OFDM symbol of each subframe in each wireless frame is used as an available physical transmission resource of a physical control channel;
if not, allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching identifier, wherein in the second resource allocation mode, the first N OFDM symbols of each subframe in each wireless frame are all used as the available physical transmission resources of the physical control channel, and N is an integer greater than 1;
and the mode switching identifier is used for indicating a receiving node in the Mesh network to perform data processing according to the resource allocation mode used by the sending node.
Preferably, in the second resource allocation mode, an mth OFDM symbol of a first subframe in each radio frame is used as an available physical transmission resource of a primary synchronization signal, a kth OFDM symbol of the first subframe in each radio frame is used as an available physical transmission resource of a secondary synchronization signal, a kth OFDM symbol of a second subframe in each radio frame is used as an available physical transmission resource of a discovery signal, the first subframe is any one of the plurality of radio frames, the second subframe is any one of the plurality of radio frames and is different from the first subframe, M is an integer greater than N, and K is an integer greater than M.
Preferably, M is equal to 9 and K is equal to 10.
Preferably, N is an integer of 2 to 4.
Preferably, the allocating physical transmission resources according to the first resource allocation mode and updating the mode switching identifier includes:
allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier to be 0;
the allocating physical transmission resources according to the second resource allocation mode and updating the mode switching identifier includes:
and allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching identifier to be 1.
Preferably, the determining process of the current channel quality indicator CQI includes:
and acquiring the CQI fed back by the receiving node, and taking the sum of the CQI fed back by the receiving node multiplied by a first weight and the historical CQI multiplied by a second weight as the current channel quality indication CQI.
A method for improving the transmission efficiency of a Mesh link is applied to a receiving node in a wireless Mesh network, and comprises the following steps:
receiving data sent by a sending node in the wireless Mesh network;
analyzing a mode switching identifier from the received data;
performing data processing according to the resource allocation mode corresponding to the mode switching identifier;
the resource allocation mode comprises a first resource allocation mode or a second resource allocation mode, in the first resource allocation mode, the first OFDM symbol of each subframe in each wireless frame is the available physical transmission resource of the physical control channel, in the second resource allocation mode, the first N OFDM symbols of each subframe in each wireless frame are the available physical transmission resource of the physical control channel, and N is an integer greater than 1.
Preferably, after the step of performing data processing according to the resource allocation mode corresponding to the mode switching identifier, the method further includes:
the CQI is further estimated and fed back to the transmitting node.
A device for improving the transmission efficiency of a Mesh link is applied to a sending node in a wireless Mesh network, and the device comprises:
a determining module, configured to determine a current channel quality indicator CQI;
the judging module is used for judging whether the current CQI is greater than a preset CQI threshold or not;
a first allocation module, configured to allocate physical transmission resources according to a first resource allocation mode and update a mode switching identifier if a current CQI is greater than a preset CQI threshold, where in the first resource allocation mode, a first OFDM symbol of each subframe in each radio frame is used as an available physical transmission resource of a physical control channel;
a second allocating module, configured to allocate physical transmission resources according to a second resource allocation mode and update the mode switching identifier if the current CQI is not greater than a preset CQI threshold, where in the second resource allocation mode, the first N OFDM symbols of each subframe in each radio frame are used as available physical transmission resources of the physical control channel, and N is an integer greater than 1;
and the mode switching identifier is used for indicating a receiving node in the Mesh network to perform data processing according to the resource allocation mode used by the sending node.
Preferably, in the second resource allocation mode, an mth OFDM symbol of a first subframe in each radio frame is used as an available physical transmission resource of a primary synchronization signal, a kth OFDM symbol of the first subframe in each radio frame is used as an available physical transmission resource of a secondary synchronization signal, a kth OFDM symbol of a second subframe in each radio frame is used as an available physical transmission resource of a discovery signal, the first subframe is any one of the plurality of radio frames, the second subframe is any one of the plurality of radio frames and is different from the first subframe, M is an integer greater than N, and K is an integer greater than M.
Preferably, M is equal to 9 and K is equal to 10.
Preferably, N is an integer of 2 to 4.
Preferably, the first allocation module is specifically configured to:
allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier to be 0;
the second allocating module is specifically configured to:
and allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching identifier to be 1.
Preferably, the determining module is specifically configured to:
and acquiring the CQI fed back by the receiving node, and taking the sum of the CQI fed back by the receiving node multiplied by a first weight and the historical CQI multiplied by a second weight as the current channel quality indication CQI.
An apparatus for improving transmission efficiency of a Mesh link, applied to a receiving node in a wireless Mesh network, the apparatus comprising:
the receiving module is used for receiving data sent by a sending node in the wireless Mesh network;
the analysis module is used for analyzing the mode switching identifier from the received data;
the data processing module is used for processing data according to the resource allocation mode corresponding to the mode switching identifier;
the resource allocation mode comprises a first resource allocation mode or a second resource allocation mode, in the first resource allocation mode, the first OFDM symbol of each subframe in each wireless frame is the available physical transmission resource of the physical control channel, in the second resource allocation mode, the first N OFDM symbols of each subframe in each wireless frame are the available physical transmission resource of the physical control channel, and N is an integer greater than 1.
Preferably, the apparatus further comprises:
and the estimation module is used for further estimating the CQI and feeding the CQI back to the sending node.
A sending node in a wireless Mesh network, comprising: a memory and a processor;
a memory for storing a program;
the processor is configured to run the program, and when the processor runs the program, the processor implements the method for improving the transmission efficiency of the Mesh link according to any one of the above items.
A receiving node in a wireless Mesh network, comprising: a memory and a processor;
a memory for storing a program;
the processor is configured to run the program, and when the processor runs the program, the processor implements the method for improving the transmission efficiency of the Mesh link as described above.
A system for improving Mesh link transmission efficiency, comprising: a sending node in the wireless Mesh network and a receiving node in the wireless Mesh network.
Compared with the prior art, the beneficial effects of this application do:
in the application, whether the current CQI is greater than a preset CQI threshold or not is judged to determine whether the current channel quality is good or not, when the current CQI is greater than the preset CQI threshold, the current channel quality is better, physical transmission resources can be distributed according to a first resource distribution mode, less physical transmission resources are distributed for each piece of control information, the requirement of a lower demodulation threshold can be met, the information can be correctly demodulated, when the current CQI is not greater than the preset CQI threshold, the current channel quality is poorer, more physical transmission resources can be distributed for each piece of control information according to a second resource distribution mode, the requirement of a higher demodulation threshold is met, the information can be correctly demodulated, and the transmission efficiency of a Mesh link is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a flowchart of an embodiment 1 of a method for improving transmission efficiency of a Mesh link according to the present application;
FIG. 2 is a schematic diagram of a first resource allocation pattern provided herein;
fig. 3 is a flowchart of embodiment 2 of a method for improving transmission efficiency of a Mesh link according to the present application;
FIG. 4 is a schematic diagram of a resource allocation provided herein;
fig. 5 is a flowchart of embodiment 3 of a method for improving transmission efficiency of a Mesh link according to the present application;
fig. 6 is a schematic logical structure diagram of an apparatus for improving transmission efficiency of a Mesh link according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application discloses a method for improving Mesh link transmission efficiency, which is applied to a sending node in a wireless Mesh network, and the method comprises the following steps: judging whether the current channel quality indicator CQI is greater than a preset CQI threshold or not; if so, allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier, wherein in the first resource allocation mode, a first OFDM symbol of each subframe in each wireless frame is used as an available physical transmission resource of a physical control channel, and the mode switching identifier is used for indicating a receiving node in the Mesh network to perform data processing according to a resource allocation mode used by the sending node; if not, allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching identifier, wherein in the second resource allocation mode, the first N OFDM symbols of each subframe in each wireless frame are all used as the available physical transmission resources of the physical control channel, and N is an integer greater than 1. In the application, the transmission efficiency of the Mesh link can be improved.
Next, a method for improving Mesh link transmission efficiency disclosed in an embodiment of the present application is introduced, and as shown in fig. 1, a flowchart of embodiment 1 of the method for improving Mesh link transmission efficiency provided in the present application is applied to a sending node in a wireless Mesh network, and the method may include the following steps:
and step S11, determining the current channel quality indicator CQI.
And S12, judging whether the current channel quality indicator CQI is greater than a preset CQI threshold.
If yes, indicating that the current channel quality is better, executing step S13; if not, it indicates that the current channel quality is poor, then step S14 is executed.
The preset CQI threshold may be set according to system message transmission performance, control message transmission performance, uplink HARQ feedback message transmission performance, and other factors.
Step S13, distributing physical transmission resources according to a first resource distribution mode, and updating a mode switching identifier, wherein in the first resource distribution mode, a first OFDM symbol of each subframe in each wireless frame is used as an available physical transmission resource of a physical control channel, and the mode switching identifier is used for indicating a receiving node in the Mesh network to process data according to the resource distribution mode used by the sending node.
Based on the first resource allocation mode, the first OFDM symbol of each subframe in each radio frame is used as an available physical transmission resource of the physical control channel, and when the physical transmission resource is specifically allocated, a resource element may be selected from the first OFDM symbol of each subframe in each radio frame as a physical transmission resource of the physical control channel.
The first resource allocation pattern may be understood as: in the prior art, referring to fig. 2 specifically, as shown in fig. 2, each radio frame includes 20 subframes, each subframe includes 14 OFDM symbols, the last OFDM symbol is used for GP, and other OFDM symbols are used for carrying messages and data. Wherein, the user reference symbols occupy the 1/4/8/11 OFDM symbols of the sub-frames # 0-18; the physical Broadcast Channel (BCH) occupies the middle 180 resource elements of the 6 th OFDM symbol of subframe 0; a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) are transmitted only by a primary node, and occupy the middle 72 resource elements of the 2 nd and 3 rd OFDM symbols of subframe 0, respectively; the discovery signal (DIS) is only transmitted from the node, occupying the middle 72 resource elements of the 2 nd OFDM symbol; the physical access channel occupies the 2 nd slot of the last subframe of the last radio frame.
The physical Control Channel (CCH) occupies the physical elements of the non-reference signals of the 1 st OFDM symbol of sub-frame # 0-n 1-1, and the physical shared channel occupies all available physical elements except the physical elements occupied by the above-mentioned channel/signal. On the first OFDM symbol, except for the user reference symbol, the remaining resource elements constitute 13 Control Channel Elements (CCEs), where the downlink HARQ ACK occupies 3 CCEs, the remaining 10 CCEs may be used for control information transmission, and the currently supported CCE aggregation levels are 2 and 4, that is, each piece of control information occupies 2 or 4 CCEs.
Step S14, distributing physical transmission resources according to a second resource distribution mode, and updating the mode switching identifier, wherein in the second resource distribution mode, the first N OFDM symbols of each subframe in each wireless frame are all used as the available physical transmission resources of the physical control channel, and N is an integer greater than 1.
Under the condition of poor quality of the current channel, a higher demodulation threshold is needed to ensure that correct demodulation can be performed, but the higher demodulation threshold needs to allocate more physical transmission resources for the physical control channel, so that the physical transmission resources can be allocated according to the second resource allocation mode. In the second resource allocation mode, the first N OFDM symbols of each subframe in each radio frame are all used as available physical transmission resources of the physical control channel, which can ensure that physical transmission resources are allocated for the physical control channel from a plurality of OFDM symbols of each subframe, so as to meet the requirement that the physical control channel needs more physical transmission resources.
It should be noted that the value of N may be determined according to the demodulation threshold of data and control information and/or the number of users communicating simultaneously in one subframe. For example, if the demodulation threshold of the data and control information is higher, or the number of users communicating simultaneously in one subframe is larger, more resources need to be reserved for the control information, and since the bandwidth in the frequency domain is fixed, more physical transmission resources (which can be understood as OFDM symbols) need to be reserved from the time domain, so N is required to be an integer greater than 1.
Preferably, N may be any integer of 2 to 4.
It should be noted that the mode switching flag corresponding to the first resource allocation mode is different from the mode switching flag corresponding to the second resource allocation mode. It may be set that in the first resource allocation mode, the mode switching flag is 0, and in the second resource allocation mode, the mode switching flag is 1.
Correspondingly, the allocating physical transmission resources according to the first resource allocation mode and updating the mode switching identifier may include:
allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier to be 0;
the allocating physical transmission resources according to the second resource allocation mode and updating the mode switching identifier may include:
and allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching identifier to be 1.
The mode switching identifier may be denoted as a CFI, and the CFI may be channel coded according to the design in the 3GPP LET protocol, and in the case that the CFI is 0 or 1, the channel coding of the CFI may be referred to table 1.
TABLE 1
| Value of | Channel coding | |
| 0 | <0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1> | |
| 1 | <1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0,1,1,0> |
In the application, whether the current CQI is greater than a preset CQI threshold or not is judged to determine whether the current channel quality is good or not, when the current CQI is greater than the preset CQI threshold, the current channel quality is better, physical transmission resources can be distributed according to a first resource distribution mode, less physical transmission resources are distributed for each piece of control information, the requirement of a lower demodulation threshold can be met, the information can be correctly demodulated, when the current CQI is not greater than the preset CQI threshold, the current channel quality is poorer, more physical transmission resources can be distributed for each piece of control information according to a second resource distribution mode, the requirement of a higher demodulation threshold is met, the information can be correctly demodulated, and the transmission efficiency of a Mesh link is improved.
As another optional embodiment of the present application, referring to fig. 3, a schematic flow diagram of an embodiment 2 of a method for improving Mesh link transmission efficiency provided by the present application is provided, where this embodiment mainly relates to a refinement scheme of the method for improving Mesh link transmission efficiency described in the foregoing embodiment 1, and as shown in fig. 3, the method may include, but is not limited to, the following steps:
and step S21, determining the current channel quality indicator CQI.
And step S22, judging whether the current channel quality indicator CQI is greater than a preset CQI threshold.
If yes, go to step S23; if not, go to step S24.
Step S23, allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier, wherein in the first resource allocation mode, a first OFDM symbol of each subframe in each wireless frame is used as an available physical transmission resource of a physical control channel, and the mode switching identifier is used for indicating a receiving node in the Mesh network to perform data processing according to the resource allocation mode used by the sending node.
Step S24, allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching flag, where in the second resource allocation mode, the first N OFDM symbols of each subframe in each radio frame are all used as available physical transmission resources of the physical control channel, and in the second resource allocation mode, the mth OFDM symbol of the first subframe in each radio frame is used as available physical transmission resources of the primary synchronization signal, the kth OFDM symbol of the first subframe in each radio frame is used as available physical transmission resources of the secondary synchronization signal, and the kth OFDM symbol of the second subframe in each radio frame is used as available physical transmission resources of the discovery signal.
The N is an integer larger than 1, the first subframe is any one of the radio frames, the second subframe is any one of the radio frames and is different from the first subframe, the M is an integer larger than the N, and the K is an integer larger than the M.
In the second resource allocation mode, the mth OFDM symbol of the first subframe in each radio frame is used as an available physical transmission resource for a primary synchronization signal, the kth OFDM symbol of the first subframe in each radio frame is used as an available physical transmission resource for a secondary synchronization signal, and the kth OFDM symbol of the second subframe in each radio frame is used as an available physical transmission resource for a discovery signal, so that the influence of an available physical transmission resource region, which is a physical control channel, on the Primary Synchronization Signal (PSS), the secondary synchronization signal (CSS), and the discovery signal (DIS) can be avoided.
Preferably, M may be equal to 9 and K equal to 10. That is, the 9 th OFDM symbol in the same subframe is used as an available physical transmission resource for the primary synchronization signal, the 10 th OFDM symbol is used as an available physical transmission resource for the secondary synchronization signal, and the 10 th OFDM symbol in any one subframe is used as an available physical transmission resource for the discovery signal. Taking two subframes as an example, the resource allocation is described, as shown in fig. 4, in the same subframe, the 9 th OFDM symbol is used as the available physical transmission resource of the primary synchronization signal, the 10 th OFDM symbol is used as the available physical transmission resource of the secondary synchronization signal, and in the other subframe, the 10 th OFDM symbol is used as the available physical transmission resource of the discovery signal.
Specifically, one radio frame (20 ms) comprises static subframes and dynamic subframes, the number of the static subframes is the same as that of nodes in a network, the rest subframes are dynamic subframes, PSS/SSS is in the static subframes, and DIS is in the dynamic subframes. The PSS/SSS is adjusted to the 9 th and 10 th OFDM symbols within one subframe, respectively, and the DIS is adjusted to the 10 th OFDM symbol within one subframe.
Step S24 is a specific implementation procedure of step S14 in embodiment 1.
As another optional embodiment of the present application, referring to fig. 5, a schematic flow chart of embodiment 3 of a method for improving transmission efficiency of a Mesh link provided by the present application is provided, where this embodiment mainly relates to a refinement scheme of the method for improving transmission efficiency of a Mesh link described in the foregoing embodiment 1, and as shown in fig. 5, the method may include, but is not limited to, the following steps:
and step S31, acquiring the CQI fed back by the receiving node, and taking the sum of the CQI fed back by the receiving node multiplied by the first weight and the historical CQI multiplied by the second weight as the current channel quality indication CQI.
And obtaining the CQI fed back by the receiving node, and taking the sum of the CQI fed back by the receiving node multiplied by the first weight and the historical CQI multiplied by the second weight as the current channel quality indication CQI to realize the smooth processing of the CQI and ensure that the current CQI is more reliable.
The first weight and the second weight may be flexibly set according to needs, and are not limited in this embodiment.
The historical CQI may be understood as: the last determined CQI.
Step S31 is a specific implementation procedure of step S11 in embodiment 1.
And step S32, judging whether the current channel quality indicator CQI is greater than a preset CQI threshold.
If yes, go to step S33; if not, go to step S34.
Step S33, allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier, wherein in the first resource allocation mode, a first OFDM symbol of each subframe in each wireless frame is used as an available physical transmission resource of a physical control channel, and the mode switching identifier is used for indicating a receiving node in the Mesh network to perform data processing according to the resource allocation mode used by the sending node.
Step S34, distributing physical transmission resources according to a second resource distribution mode, and updating the mode switching identifier, wherein in the second resource distribution mode, the first N OFDM symbols of each subframe in each wireless frame are all used as the available physical transmission resources of the physical control channel, and N is an integer greater than 1.
The detailed processes of steps S33-S34 can be referred to the related descriptions of steps S12-S13 in embodiment 1, and are not described herein again.
In embodiment 4 of the present application, another method for improving transmission efficiency of a Mesh link is introduced, where the method is applied to a receiving node in a wireless Mesh network, and the method may include the following steps:
and A11, receiving data sent by a sending node in the wireless Mesh network.
The data sent by the sending node in the wireless Mesh network comprises a mode switching identifier, and the mode switching identifier is updated by the sending node after physical transmission resources are distributed according to a resource distribution mode. And under different resource allocation modes, the mode switching identifiers are different.
The resource allocation mode comprises a first resource allocation mode or a second resource allocation mode, in the first resource allocation mode, the first OFDM symbol of each subframe in each wireless frame is the available physical transmission resource of the physical control channel, in the second resource allocation mode, the first N OFDM symbols of each subframe in each wireless frame are the available physical transmission resource of the physical control channel, and N is an integer greater than 1.
If so, in the first resource allocation mode, the mode switching identifier is 0; in the second resource allocation mode, the mode switch flag is 1.
And A12, analyzing the mode switching identifier from the received data.
And A13, performing data processing according to the resource allocation mode corresponding to the mode switching identifier.
If the mode switching identifier is 0, performing demapping and data demodulation according to a first resource allocation mode corresponding to the mode switching identifier; and if the mode switching identifier is 1, performing demapping and data demodulation according to a second resource allocation mode corresponding to the mode switching identifier.
In embodiment 5 of the present application, another method for improving transmission efficiency of a Mesh link is introduced, where the method is applied to a receiving node in a wireless Mesh network, and the method may include the following steps:
and A21, receiving data sent by a sending node in the wireless Mesh network.
And A22, analyzing the mode switching identifier from the received data.
And A23, performing data processing according to the resource allocation mode corresponding to the mode switching identifier.
The detailed procedures of steps a21-a23 can be referred to the related descriptions of steps a11-a13 in embodiment 4, and are not described herein again.
And A24, further estimating the CQI and feeding the CQI back to the sending node.
The receiving node further estimates the CQI and feeds the CQI back to the sending node, so that the reliability of the sending node for determining the current CQI can be improved.
Next, a device for improving the transmission efficiency of the Mesh link provided by the present application is introduced, and the device for improving the transmission efficiency of the Mesh link described below and the method for improving the transmission efficiency of the Mesh link described above may be referred to correspondingly.
As shown in fig. 6, the apparatus for improving the transmission efficiency of the Mesh link may include: a determination module 11, a judgment module 12, a first distribution module 13 and a second distribution module 14.
A determining module 11, configured to determine a current channel quality indicator CQI.
A judging module 12, configured to judge whether a current CQI is greater than a preset CQI threshold;
a first allocation module 13, configured to allocate physical transmission resources according to a first resource allocation mode and update a mode switching identifier if the current CQI is greater than a preset CQI threshold, where in the first resource allocation mode, a first OFDM symbol of each subframe in each radio frame is used as an available physical transmission resource of a physical control channel;
a second allocating module 14, configured to allocate physical transmission resources according to a second resource allocation mode and update the mode switching identifier if the current CQI is not greater than a preset CQI threshold, where in the second resource allocation mode, the first N OFDM symbols of each subframe in each radio frame are all used as available physical transmission resources of the physical control channel, and N is an integer greater than 1;
and the mode switching identifier is used for indicating a receiving node in the Mesh network to perform data processing according to the resource allocation mode used by the sending node.
In this embodiment, in the second resource allocation mode, an mth OFDM symbol of a first subframe in each radio frame may be used as an available physical transmission resource of a primary synchronization signal, a kth OFDM symbol of the first subframe in each radio frame may be used as an available physical transmission resource of a secondary synchronization signal, a kth OFDM symbol of a second subframe in each radio frame may be used as an available physical transmission resource of a discovery signal, the first subframe is any one of the plurality of radio frames, the second subframe is any one of the plurality of radio frames and is different from the first subframe, M is an integer greater than N, and K is an integer greater than M.
In this embodiment, M may be equal to 9, and K may be equal to 10.
In this embodiment, N may be any integer from 2 to 4.
In this embodiment, the first distribution module 12 may be specifically configured to:
allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier to be 0;
the second allocating module may specifically be configured to:
and allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching identifier to be 1.
In this embodiment, the determining module 11 may specifically be configured to:
and acquiring the CQI fed back by the receiving node, and taking the sum of the CQI fed back by the receiving node multiplied by a first weight and the historical CQI multiplied by a second weight as the current channel quality indication CQI.
In another embodiment of the present application, there is provided another apparatus for improving transmission efficiency of a Mesh link, where the apparatus is applied to a receiving node in a wireless Mesh network, and the apparatus includes:
the receiving module is used for receiving data sent by a sending node in the wireless Mesh network;
the analysis module is used for analyzing the mode switching identifier from the received data;
the data processing module is used for processing data according to the resource allocation mode corresponding to the mode switching identifier;
the resource allocation mode comprises a first resource allocation mode or a second resource allocation mode, in the first resource allocation mode, the first OFDM symbol of each subframe in each wireless frame is the available physical transmission resource of the physical control channel, in the second resource allocation mode, the first N OFDM symbols of each subframe in each wireless frame are the available physical transmission resource of the physical control channel, and N is an integer greater than 1.
In this embodiment, the apparatus for improving the transmission efficiency of the Mesh link may further include:
and the estimation module is used for further estimating the CQI and feeding the CQI back to the sending node.
In another embodiment of the present application, there is provided a sending node in a wireless Mesh network, including: a memory and a processor;
a memory for storing a program;
the processor is configured to run the program, and when the processor runs the program, the processor implements the method for improving the transmission efficiency of the Mesh link according to any one of embodiments 1 to 3.
In another embodiment of the present application, there is provided a receiving node in a wireless Mesh network, including: a memory and a processor;
a memory for storing a program;
the processor is configured to run the program, and when the processor runs the program, the processor implements the method for improving the transmission efficiency of the Mesh link according to embodiment 4.
In another embodiment of the present application, a system for improving transmission efficiency of a Mesh link is introduced, which may include: a sending node in the wireless Mesh network and a receiving node in the wireless Mesh network.
For the sending node in the wireless Mesh network, reference may be made to the sending node in the wireless Mesh network described in the foregoing embodiment, which is not described herein again.
For the receiving node in the wireless Mesh network, reference may be made to the receiving node in the wireless Mesh network described in the foregoing embodiment, which is not described herein again.
It should be noted that each embodiment is mainly described as a difference from the other embodiments, and the same and similar parts between the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The method, the device and the related equipment for improving the Mesh link transmission efficiency provided by the application are introduced in detail, specific examples are applied in the description to explain the principle and the implementation mode of the application, and the description of the above embodiments is only used for helping to understand the method and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (11)
1. A method for improving transmission efficiency of a Mesh link is applied to a sending node in a wireless Mesh network, and comprises the following steps:
determining a current Channel Quality Indicator (CQI);
judging whether the current CQI is greater than a preset CQI threshold or not;
if so, allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier, wherein in the first resource allocation mode, a first OFDM symbol of each subframe in each wireless frame is used as an available physical transmission resource of a physical control channel;
if not, allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching identifier, wherein in the second resource allocation mode, the first N OFDM symbols of each subframe in each wireless frame are all used as the available physical transmission resources of the physical control channel, and N is an integer greater than 1;
and the mode switching identifier is used for indicating a receiving node in the Mesh network to perform data processing according to the resource allocation mode used by the sending node.
2. The method of claim 1, wherein in the second resource allocation mode, an Mth OFDM symbol of a first subframe in each radio frame is used as an available physical transmission resource for a primary synchronization signal, a Kth OFDM symbol of the first subframe in each radio frame is used as an available physical transmission resource for a secondary synchronization signal, a Kth OFDM symbol of a second subframe in each radio frame is used as an available physical transmission resource for a discovery signal, wherein a first subframe is any one of the plurality of radio frames, wherein the second subframe is any one of the plurality of radio frames and is different from the first subframe, wherein M is an integer greater than N, and wherein K is an integer greater than M.
3. The method of claim 2, wherein M is equal to 9 and K is equal to 10.
4. The method according to claim 1, wherein N is any one integer of 2 to 4.
5. The method of claim 1, wherein said allocating physical transmission resources according to the first resource allocation mode and updating the mode switch identifier comprises:
allocating physical transmission resources according to a first resource allocation mode, and updating a mode switching identifier to be 0;
the allocating physical transmission resources according to the second resource allocation mode and updating the mode switching identifier includes:
and allocating physical transmission resources according to a second resource allocation mode, and updating the mode switching identifier to be 1.
6. The method of claim 1, wherein the determining the current Channel Quality Indication (CQI) comprises:
and acquiring the CQI fed back by the receiving node, and taking the sum of the CQI fed back by the receiving node multiplied by a first weight and the historical CQI multiplied by a second weight as the current channel quality indication CQI.
7. A method for improving transmission efficiency of a Mesh link is applied to a receiving node in a wireless Mesh network, and comprises the following steps:
receiving data sent by a sending node in the wireless Mesh network;
analyzing a mode switching identifier from the received data;
performing data processing according to the resource allocation mode corresponding to the mode switching identifier;
the resource allocation mode comprises a first resource allocation mode or a second resource allocation mode, in the first resource allocation mode, the first OFDM symbol of each subframe in each wireless frame is the available physical transmission resource of the physical control channel, in the second resource allocation mode, the first N OFDM symbols of each subframe in each wireless frame are the available physical transmission resource of the physical control channel, and N is an integer greater than 1.
8. The method according to claim 7, wherein after the step of performing data processing according to the resource allocation mode corresponding to the mode switching identifier, the method further comprises:
the CQI is further estimated and fed back to the transmitting node.
9. A sending node in a wireless Mesh network, comprising: a memory and a processor;
a memory for storing a program;
the processor, configured to execute the program, and when the processor executes the program, the processor implements the method for improving transmission efficiency of a Mesh link according to any one of claims 1 to 6.
10. A receiving node in a wireless Mesh network, comprising: a memory and a processor;
a memory for storing a program;
the processor, configured to execute the program, and when the processor executes the program, the processor implements the method for improving transmission efficiency of a Mesh link according to claim 7 or 8.
11. A system for improving Mesh link transmission efficiency, comprising: a sending node in the wireless Mesh network of claim 9 and a receiving node in the wireless Mesh network of claim 10.
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| KR101719818B1 (en) * | 2009-03-23 | 2017-03-27 | 엘지전자 주식회사 | Method and apparatus for transmitting reference signal in multiple antenna system |
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| CN103457711B (en) * | 2013-07-05 | 2017-04-19 | 大唐移动通信设备有限公司 | Method and device for determining the number of OFDM symbols occupied by control channel |
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