CN104052569A - MCS switching method and device - Google Patents
MCS switching method and device Download PDFInfo
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- CN104052569A CN104052569A CN201310078252.1A CN201310078252A CN104052569A CN 104052569 A CN104052569 A CN 104052569A CN 201310078252 A CN201310078252 A CN 201310078252A CN 104052569 A CN104052569 A CN 104052569A
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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
- H04L1/0025—Transmission of mode-switching indication
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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
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
- H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
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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
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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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
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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Abstract
The invention discloses an MCS switching method and a device. The method comprises steps that: whether switching of MCS for communication between a first communication node and a second communication node is needed is detected; if yes, switching is carried out through a direct connection channel between the first communication node and the second communication node. The method solves technical problems of relatively large time delay and relatively high error rate caused by MCS switching through a network management system in the prior art, and the technical effects of reducing MCS switching time delay and reducing the error rate are realized.
Description
Technical field
The present invention relates to the communications field, in particular to the method and apparatus of a kind of switch modulation coded system (Modulation Coding Scheme, referred to as MCS).
Background technology
Microwave communication is called as three large Main Means of modern communications transmission together with optical fiber communication, satellite communication.Microwave communication is general, and what adopt is point-to-point transmission means, is mainly used at present in the bearer network that 2G or 3G move, for mobile operator provides the transmission of voice-and-data business, have transmission capacity large, long-distance transmission quality is stable, small investment, the advantages such as the construction period is short, easy to maintenance.As shown in Figure 1, point-to-point scene both can be for also having can be used for the backbone transport between base station and base station control station or IAD between base station for the typical network topology that microwave communication is applied to mobile bearer network.
Conventionally microwave communication node as shown in Figure 2, is comprised of modem module and Transmit Receive Unit two parts.Wherein, modem module comprises: baseband interface and modem module, so be generally placed on the indoor indoor unit (In-Door Unit, referred to as IDU) that is called again.Transmit Receive Unit is mainly realized radio-frequency receiving-transmitting function, is generally placed on steel tower together with antenna, so be called again outdoor unit (Out-Door Unit, referred to as ODU).
Development along with mobile wireless network and ethernet technology, microwave transmission is by traditional time division multiplexing (Time Division Multiplexing, referred to as TDM) business transmission (for example: time division multiplexing progressively develops into mixed service transmission now, E1, the pattern that the various types of data such as Ethernet is mixed), and transmission capacity progressively increasing.From the data of distinct interface, be unified scheduling and be packaged into Frame, then by modem module, modulate, and send by radio frequency unit.Transmission means due to microwave point to point wireless communication, to having relatively high expectations of environment, need to adjust modulation system and code check adapts to current channel conditions according to the impact of environment, when communication environment is better, the higher modulation system of general employing, throughput is larger; Otherwise adopt lower modulation system.
At present, when needs carry out MCS switching, as shown in Figure 3, after system powers on, the sending and receiving end of A node and B node is all operated under the modulation coding mode (Modulation Coding Scheme, referred to as MCS) and code check of acquiescence the mode of processing.Variation along with environment, when current modulation system and code check can not meet requiring of channel, the receiving terminal of A node and B node can be to local central processing unit (Central Processing Unit, referred to as CPU) send the instruction require opposite end to switch MCS, this instruction is notified the CPU to opposite end by upper layer NMS, and switching command is sent to respectively to local outside accommodation unit and Modem(modem module), and outside accommodation unit and the Modem of source node, thereby the system that guaranteed is carried out the switching of corresponding MCS in the position of same frame data.
Yet, while adopting aforesaid way to process, mainly there will be following problem:
1) handover request is sent to CPU, and then be uploaded to upper layer NMS, can cause like this handover delay larger, general handover delay roughly can reach 10ms to 20ms;
2) be difficult to guarantee that the outside accommodation unit of A node and B node and Modem carry out the switching of corresponding MCS in the position of same frame data, thereby cause producing error code;
3) need the collaborative of outside webmaster, implement required code larger.
For above-mentioned problem, effective solution is not yet proposed at present.
Summary of the invention
The embodiment of the present invention provides the method and apparatus of a kind of MCS of switching, at least to solve in prior art, by network management system, carries out the technical problem that time delay is large, the error rate is higher that MCS switching causes.
According to the embodiment of the present invention aspect, the method for MCS of switching a kind of is provided, comprising: whether the MCS that detection the first communication node and second communication enabling communication between nodes are used needs to switch; Determining be in the situation that, by the direct-connected channel between above-mentioned the first communication node and above-mentioned second communication node, carry out above-mentioned switching.
Preferably, by the above-mentioned direct-connected channel between above-mentioned the first communication node and above-mentioned second communication, carrying out above-mentioned switching comprises: at above-mentioned the first communication node, determine need to carry out above-mentioned switching in the situation that, above-mentioned the first communication node sends MCS request message to above-mentioned second communication node, wherein, above-mentioned MCS request message is for notifying above-mentioned second communication node to adopt new MCS to communicate on predetermined frame.
Preferably, MCS request message is carried in MCS_type numeric field data frame.
Preferably, at above-mentioned the first communication node, after above-mentioned second communication node sends above-mentioned MCS request message, said method also comprises: above-mentioned second communication node receives above-mentioned MCS request message; After the frame head index signal that the transmission AMC control module of above-mentioned second communication node sends at the outside accommodation unit that above-mentioned second communication node detected, by above-mentioned MCS request message, notify the outside accommodation unit to above-mentioned second communication node again, during M-1 frame for the outside accommodation unit of notifying above-mentioned second communication node after receiving above-mentioned MCS request message, adopt above-mentioned new MCS to communicate, wherein, M is positive integer.
Preferably, after notifying the outside accommodation unit to above-mentioned second communication node by above-mentioned MCS request message, said method also comprises: during the M frame of the outside accommodation unit of the modem module of above-mentioned second communication node and above-mentioned second communication node from above-mentioned second communication node receives above-mentioned MCS request message, adopt above-mentioned new MCS to communicate.
Preferably, after notifying the outside accommodation unit to above-mentioned second communication node by above-mentioned MCS request message, said method also comprises: the reception AMC control module of above-mentioned the first communication node receives the above-mentioned MCS request message of the modem module transmission that receives above-mentioned second communication node on M-1 frame after above-mentioned MCS request message at above-mentioned second communication node, for notifying above-mentioned the first communication node to adopt above-mentioned new MCS to communicate; During the next frame of the modulation /demodulation module of above-mentioned the first communication node after receiving above-mentioned MCS request message, start to adopt above-mentioned new MCS to communicate; The outside accommodation unit of above-mentioned the first communication node starts to adopt above-mentioned new MCS to communicate receiving when above-mentioned second communication node receives the frame head index signal of the next frame after above-mentioned MCS request message.
Preferably, whether need switch comprise: when mean square error MSE is greater than the first predetermined threshold and/or block error rate BLER is greater than in the situation of the second predetermined threshold, determine between above-mentioned the first communication node and above-mentioned second communication node and need to carry out above-mentioned switching if detecting the MCS that above-mentioned the first communication node and above-mentioned second communication enabling communication between nodes use.
Preferably, said method is applied in microwave telecommunication system.
According to the embodiment of the present invention on the other hand, the device of a kind of MCS of switching is provided, be arranged in peer-to-peer communications node, comprise: Adaptive Modulation and Coding AMC engine modules, for detection of and another communication node between communicate used MCS and whether need to switch; The AMC control module of making a start, for determining be in the situation that, by and above-mentioned another second communication node between direct-connected channel carry out above-mentioned switching.
Preferably, the above-mentioned AMC of making a start control module is also for determining be in the situation that, receiving end AMC control module to above-mentioned another communication node sends MCS request message, and wherein, above-mentioned MCS request message is for notifying above-mentioned another communication node to adopt new MCS to communicate on predetermined frame.
In embodiments of the present invention, in the communication system of point-to-point equity, if when detecting the MCS adopting between two peer-to-peer communications nodes and can not meet current system needs, in the time of need to adopting new MCS to communicate, by the direct-connected channel between two peer-to-peer communications nodes, switch, and by the third party NMS system outside two peer-to-peer communications nodes, do not switch, solved in correlation technique that by network management system, to carry out the time delay that MCS switching causes larger, the technical problem that the error rate is higher, reached the technique effect that reduces MCS handoff delay and reduce the error rate.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the microwave point-to-point transmission scene schematic diagram according to correlation technique;
Fig. 2 is according to the schematic diagram of the composition of the microwave transmission system of correlation technique;
Fig. 3 processes block diagram according to the microwave Adaptive Modulation and Coding of correlation technique;
Fig. 4 is according to a kind of preferred flow charts of the method for the switching MCS of the embodiment of the present invention;
Fig. 5 is a kind of modulating-coding frame structure schematic diagram of the microwave Adaptive Modulation and Coding of the embodiment of the present invention;
Fig. 6 is a kind of preferred structure block diagram according to the device of the switching MCS of the embodiment of the present invention;
Fig. 7 is a kind of preferred process block diagram according to the microwave Adaptive Modulation and Coding of the embodiment of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
The embodiment of the present invention provides the method for preferred switching MCS a kind of, and as shown in Figure 4, the method comprises the following steps:
Step S402: whether the MCS that detection the first communication node and second communication enabling communication between nodes are used needs to switch;
Step S404: determining be in the situation that, carry out described switching by the direct-connected channel between described the first communication node and described second communication node.
In above-mentioned preferred implementation, in the communication system of point-to-point equity, if when detecting the MCS adopting between two peer-to-peer communications nodes and can not meet current system needs, in the time of need to adopting new MCS to communicate, by the direct-connected channel between two peer-to-peer communications nodes, switch, and by the third party NMS system outside two peer-to-peer communications nodes, do not switch, solved in correlation technique that by network management system, to carry out the time delay that MCS switching causes larger, the technical problem that the error rate is higher, reached the technique effect that reduces MCS handoff delay and reduce the error rate.
In above-mentioned steps S402, can determine whether in the following manner to carry out the switching of MCS, if mean square error (Mean Square Error, referred to as MSE) be greater than the first predetermined threshold and/or block error rate (Block Error Ratio, referred to as BLER) be greater than the second predetermined threshold, can determine between described the first communication node and described second communication node and need to carry out described switching.Preferably, above-mentioned judgement can be carried out at the first communication node, can be also that second communication node carries out, and yes, and which node is judged, and just which node to trigger above-mentioned switching flow by.In actual applications, may there is multiple MCS, so should corresponding two above-mentioned threshold values (size of threshold value can be configured by software) for each current MCS.Preferably, in order to guarantee that the selection of thresholding can leave some surpluses without switching without code, that is, in the threshold value of setting, be a threshold interval, during arbitrary value in being greater than this interval, just carry out corresponding switching.
In above-mentioned steps S404, in order to make directly to switch by the direct-connected channel between two communication nodes, can carry by the Frame transmitting corresponding handover request message between two communication nodes.In a preferred implementation, by the direct-connected channel between the first communication node and second communication, switch and comprise: at the first communication node, determine need to carry out described switching in the situation that, the first communication node sends the MCS request message switching flow of the first communication node triggering following (by) to described second communication node, wherein, above-mentioned MCS request message is for notifying described second communication node to adopt new MCS to communicate on predetermined frame.For example, this MCS request message can be carried in MCS_type numeric field data frame as shown in Figure 5, preferably, one section in can preliminary setting data frame be carried this MCS request message, for example, MCS request message can be carried in a high position for MCS_type numeric field data frame.
In order to realize the outside accommodation unit of the first communication node and second communication node and modem module, can in same frame, be switched to new MCS and communicate, can realize in the following way synchronous between two communication nodes: after second communication node sends MCS request message, second communication node receives this MCS request message at the first communication node; Yet, at once this MCS request message is not sent to the outside accommodation unit of second communication node, but detect after the frame head index signal (sync) that the outside accommodation unit of second communication node sends in the transmission AMC of second communication node control module, again MCS request message is notified to the outside accommodation unit to second communication node, during M the frame of the outside accommodation unit of notifying second communication node by this MCS request message after second communication node receives MCS request message, adopt new MCS to communicate, wherein, M is positive integer.That is, intercommunication node has configured this numerical value of M in advance, and the external load bearing unit of then indicating second communication node just M-1 frame after receiving request message starts to be switched to new MCS and communicates.Preferably, M can be configured when whole communication system initialization powers on.That is, adopt new MCS to communicate during the M frame of the outside accommodation unit of the modem module of second communication node and second communication node from second communication node receives MCS request message simultaneously.
In a preferred implementation, the modem module of second communication node reception AMC control module to the first communication node on self receiving M-1 frame MCS request message sends MCS request message, for notifying the first communication node to adopt new MCS to communicate; During the next frame of the modulation /demodulation module of the first communication node after receiving described MCS request message, start to adopt new MCS to communicate; The outside accommodation unit of the first communication node starts to adopt new MCS to communicate when receiving the frame head index signal of next frame.
Because, the outside accommodation unit of second communication node has started to have sent the first frame when receiving MCS request message (request mcs), therefore, outside accommodation unit can only start counting from next frame frame head, yet modem directly starts counting from present frame simultaneously, therefore the M frame that modem counts is the former frame of the M frame that arrives of outside accommodation unit meter, make by the way the modem module of the first communication node, the outside accommodation unit of the first communication node, the modem module of second communication node, the outside accommodation unit of second communication node can carry out at same frame the switching of MCS.
In above-mentioned each preferred implementation, said method can be, but not limited to be applied in microwave telecommunication system.
The device of a kind of MCS of switching is also provided in the present embodiment, has been arranged in peer-to-peer communications node, this device is used for realizing above-described embodiment and preferred implementation, has carried out repeating no more of explanation.As used below, term " unit " or " module " can realize the combination of software and/or the hardware of predetermined function.Although the described device of following examples is preferably realized with software, hardware, or the realization of the combination of software and hardware also may and be conceived.Fig. 6 is a kind of preferred structure block diagram according to the device of the switching MCS of the embodiment of the present invention, as shown in Figure 6, comprise: Adaptive Modulation and Coding (Adaptive Modulation and Coding, referred to as AMC) engine modules determining unit 602 and the AMC control module 604 of making a start, below this structure is described.
Self adaptation AMC engine modules 602, for detection of and another communication node between communicate used MCS and whether need to switch;
The AMC control module 604 of making a start, with 602 couplings of Adaptive Modulation and Coding engine modules, for determining be in the situation that, by and described another second communication node between direct-connected channel carry out described switching.
In a preferred implementation, the above-mentioned AMC of making a start control module 604 is also for determining be in the situation that, receiving end AMC control module to described another communication node sends MCS request message, wherein, described MCS request message is for notifying described another communication node to adopt new MCS to communicate on predetermined frame.
The device of above-mentioned switching MCS is arranged in the first communication node, above-mentioned receiving end AMC control module is arranged in second communication node, yet, it should be noted that the first communication node and second communication node are reciprocity communication nodes, in the first communication node and second communication node, be all have self adaptation AMC engine modules simultaneously, the AMC control module of making a start and receiving end AMC control module.
System switching construction with the adaptive coding and modulating in a concrete preferred point-to-point reciprocity wireless communication system comes further the present invention to be made an explanation below, but it should be noted that, the preferred embodiment just, in order better to describe the present invention, does not form the present invention is limited improperly.
By following embodiment, point-to-point reciprocity wireless communication system can respond in time the variation of wireless channel in real channel, without error code ground rapid adjustment modulation coding mode (Modulation Coding Scheme, referred to as MCS), to adapt to current channel.The system switching construction of this adaptive coding and modulating can be supported the switching of modulation system and coded system, and hardware implementation structure is also fairly simple, only needs to increase some corresponding Rule of judgment, and resource overhead is less.Below to now process specific descriptions are as follows in fact, as shown in Figure 7:
Adaptive Modulation and Coding (the Adaptive Modulation and Coding of S1:B node (being equivalent to the first above-mentioned communication node), referred to as AMC) engine modules is according to mean square error (Mean Square Error, referred to as MSE) and block error rate (Block Error Ratio, referred to as BLER) situation judge the situation of change (preferably, Rule of judgment can be configured by software) of current link; When the value of MSE or the value of BLER exceed certain predetermined thresholding, can determine and need to be switched to corresponding MCS, corresponding two the predetermined threshold values (threshold value can be configured by software) of each current MCS.Preferably, in order to guarantee that the selection of thresholding can leave some surpluses without switching without code, that is, in the threshold value of setting, be a threshold interval, during arbitrary value in being greater than this interval, just carry out corresponding switching.
S2: notify the transmission AMC control module of this node to carry corresponding MCS request message (request mcs message) in next frame by the AMC engine modules of B node, preferably, this request mcs message can be inserted in the high position in the MCS_tpye territory in frame format as shown in Figure 5 and send;
The transmission AMC control module of S3:B node sends the Frame that carries corresponding request mcs message;
S4: when the reception AMC control module of A node (being equivalent to above-mentioned second communication node) receives after request mcs message, the transmission AMC control module by request mcs message informing to A node;
S5: again the request mcs receiving is notified to the outside accommodation unit of this A node after the transmission AMC of A node control module is detecting the frame head index signal (sync) that the outside accommodation unit of A node sends, for the outside accommodation unit of A node, this request mcs indication be the MCS that should adopt on pre_notice number frame, pre_notice number(is equivalent to above-mentioned M) frame number notified in advance can be configured by software powering on when initial;
S6: when request mcs now being detected when different with the request mcs receiving last time, start counter, outside accommodation unit is switched on new MCS when counting to pre_notice number frame, modem is when counting to pre_notice number frame, in the low level in MCS type (MCS_tpye) territory in frame format as shown in Figure 5, carry upper request mcs message and send to B node, because sync is the index signal of frame head, therefore outside accommodation unit has started to have sent the first frame when receiving request mcs, therefore outside accommodation unit can only start counting from next frame frame head, modem starts counting simultaneously, former frame of the pre_notice number frame that so the pre_notice number frame that modem counts is outside accommodation unit meter to be arrived.Sending of above-mentioned pre-notification frame, has guaranteed that quick switching has reduced several frames than traditional implementation on the time of realizing, and has also just been equivalent to reduce the time of 4-8 millisecond;
The reception AMC control module of S7:B node is after parsing this request mcs message, the outside accommodation unit of notice B node will be switched to new MCS when next frame, when outside accommodation unit receives header signal, start to start new MCS, thereby guarantee the switching of synchronizeing with modem.
In above-mentioned steps S5 and S6, complete the transmitting terminal that MCS notifies outside accommodation unit in advance, both sides are switched corresponding MCS in the position of pre_notice number designated frame, thereby without error code, produce in the process that has guaranteed to switch.If when pre_noticenumber is configured to 1, now when sending AMC control module, immediately the request mcs receiving is notified to outside accommodation unit again after the frame head index signal (sync) that outside accommodation unit sends being detected, make outside accommodation unit complete fast the switching of MCS, the long delay of whole process only has 4ms, because the variation of channel is a gradual process, what 8ms postponed just can catch up with the variation of channel.At above-mentioned steps S7, complete the receiving terminal that MCS notifies outside accommodation unit in advance, with the fastest rate request receiving terminal, receive the data after switching.Adopt such switching mode, not only guaranteed system without the switching of error code, respond current channel variation speed faster, make the handoff delay smaller simultaneously, code required when hardware is realized is simultaneously also less.
In above preferred embodiment, being with B node feedback channel adjustment information, for A, to the MCS of B one way link, adjusting, because A and B are reciprocity nodes, is therefore also the same for A node feedback channel adjustment information.Meanwhile, respectively do each adjustment between the two, do not exert an influence each other.
In another embodiment, also provide a kind of software, the technical scheme that this software is described for carrying out above-described embodiment and preferred implementation.
In another embodiment, also provide a kind of storage medium, stored above-mentioned software in this storage medium, this storage medium includes but not limited to: CD, floppy disk, hard disk, scratch pad memory etc.
From above description, can find out, the present invention has realized following technique effect: in the communication system of point-to-point equity, if when detecting the MCS adopting between two peer-to-peer communications nodes and can not meet current system needs, in the time of need to adopting new MCS to communicate, by the direct-connected channel between two peer-to-peer communications nodes, switch, and by the third party NMS system outside two peer-to-peer communications nodes, do not switch, solved in correlation technique that by network management system, to carry out the time delay that MCS switching causes larger, the technical problem that the error rate is higher, reached the technique effect that reduces MCS handoff delay and reduce the error rate.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or a plurality of modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a method of switch modulation coded system MCS, is characterized in that, comprising:
Whether detect the MCS that the first communication node and second communication enabling communication between nodes use needs to switch;
Determining be in the situation that, by the direct-connected channel between described the first communication node and described second communication node, carry out described switching.
2. method according to claim 1, is characterized in that, carries out described switching comprise by the described direct-connected channel between described the first communication node and described second communication:
At described the first communication node, determine need to carry out described switching in the situation that, described the first communication node sends MCS request message to described second communication node, wherein, described MCS request message is for notifying described second communication node to adopt new MCS to communicate on predetermined frame.
3. method according to claim 2, is characterized in that, described MCS request message is carried in MCS_type numeric field data frame.
4. method according to claim 2, is characterized in that, at described the first communication node, after described second communication node sends described MCS request message, described method also comprises:
Described second communication node receives described MCS request message;
After the frame head index signal that the transmission AMC control module of described second communication node sends at the outside accommodation unit that described second communication node detected, by described MCS request message, notify the outside accommodation unit to described second communication node again, during M-1 frame for the outside accommodation unit of notifying described second communication node after receiving described MCS request message, adopt described new MCS to communicate, wherein, M is positive integer.
5. method according to claim 4, is characterized in that, after notifying the outside accommodation unit to described second communication node by described MCS request message, described method also comprises:
During the M frame of the outside accommodation unit of the modem module of described second communication node and described second communication node from described second communication node receives described MCS request message, adopt described new MCS to communicate.
6. method according to claim 4, is characterized in that, after notifying the outside accommodation unit to described second communication node by described MCS request message, described method also comprises:
The reception AMC control module of described the first communication node receives the described MCS request message of the modem module transmission that receives described second communication node on M-1 frame after described MCS request message at described second communication node, for notifying described the first communication node to adopt described new MCS to communicate;
During the next frame of the modulation /demodulation module of described the first communication node after receiving described MCS request message, start to adopt described new MCS to communicate;
The outside accommodation unit of described the first communication node starts to adopt described new MCS to communicate receiving when described second communication node receives the frame head index signal of the next frame after described MCS request message.
7. whether according to the method described in any one in claim 1 to 6, it is characterized in that, detecting the MCS that described the first communication node and described second communication enabling communication between nodes use needs to switch to comprise:
When mean square error MSE is greater than the first predetermined threshold and/or block error rate BLER is greater than in the situation of the second predetermined threshold, determine between described the first communication node and described second communication node and need to carry out described switching.
8. according to the method described in any one in claim 1 to 6, it is characterized in that, be applied in microwave telecommunication system.
9. a device of switch modulation coded system MCS, is characterized in that, is arranged in peer-to-peer communications node, comprising:
Adaptive Modulation and Coding AMC engine modules, for detection of and another communication node between communicate used MCS and whether need to switch;
The AMC control module of making a start, for determining be in the situation that, by and described another second communication node between direct-connected channel carry out described switching.
10. device according to claim 9, it is characterized in that, the described AMC of making a start control module is also for determining be in the situation that, receiving end AMC control module to described another communication node sends MCS request message, wherein, described MCS request message is for notifying described another communication node to adopt new MCS to communicate on predetermined frame.
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| CN201310078252.1A CN104052569B (en) | 2013-03-12 | 2013-03-12 | Method and device for switching MCS |
| PCT/CN2013/090511 WO2014139307A1 (en) | 2013-03-12 | 2013-12-26 | Method and apparatus for mcs switching |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601376A (en) * | 2015-01-07 | 2015-05-06 | 北京华为数字技术有限公司 | Heartbeat message sending method and device |
| CN109495129A (en) * | 2018-12-28 | 2019-03-19 | 四川安迪科技实业有限公司 | A kind of spread spectrum multiple lossless switching method based on satellite communication |
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Also Published As
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| WO2014139307A1 (en) | 2014-09-18 |
| CN104052569B (en) | 2020-06-30 |
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