CN102006232A

CN102006232A - Dynamic bandwidth distributing method, device and system

Info

Publication number: CN102006232A
Application number: CN2010105615945A
Authority: CN
Inventors: 陈娟; 蒋红丽; 胡幸; 陈志云
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-04-06
Anticipated expiration: 2030-11-26
Also published as: CN102006232B

Abstract

The invention discloses dynamic bandwidth distributing method, device and system. In the embodiment of the invention, expected link bandwidth and current bandwidth requests of links in a microwave network are obtained dynamically, then a bandwidth map is obtained through calculation according to the expected link bandwidth and current bandwidth requests so as to be convenient for dynamically distributing bandwidth. By adopting the scheme, the problem of resource waste or unusable microwave network caused by inconsistency of link bandwidth using the bandwidth map with the link bandwidth calculating the bandwidth map can be avoided, the bandwidth can be dynamically distributed in the microwave network, and the link resources can be fully utilized.

Description

A kind of distribution method of dynamic bandwidth, device and system

Technical field

The present invention relates to communication technical field, be specifically related to a kind of distribution method of dynamic bandwidth, device and system.

Background technology

Dynamic Bandwidth Allocation (DBA, Dynamic Bandwidth Allocation) technology, the bandwidth request according to the user that refers to is dynamically arranged the correlation technique of user's access bandwidth by DBA control appliance (being also referred to as the DBA control unit); Than static bandwidth allocation, Dynamic Bandwidth Allocation can provide flexible bandwidth channel for the user, idle bandwidth can be discharged to other users when a certain user does not have professional the transmission and use, thereby can maximize bandwidth utilization.

The DBA technology is used usually in time-multiplexed system, and the system of use DBA technology can regard the system of master-slave mode as, is to distribute bandwidth from node by host node.Though allocation strategy or algorithm are various, but must guarantee that all the bandwidth sum of being distributed can not surpass the actual total bandwidth (bandwidth is also referred to as capacity) of every link, that is to say,, distribute to all professional bandwidth and add up and just can not surpass 1Gbps if the total bandwidth of link has only 1Gbps.In the existing DBA scheme, the DBA control appliance can periodically obtain bandwidth request, but the link total bandwidth but predict, such as the maximum transmission rate that in fiber optic network, just can judge link, i.e. link bandwidth according to optical module or signal frame form; Then link bandwidth is configured in allocation strategy or the algorithm in advance as a known parameters.Because link bandwidth information etc. has been configured in the algorithm in advance, therefore, in the calculating and renewal process of each Dynamic Bandwidth Allocation of taking turns, the DBA control appliance only need obtain each professional bandwidth request again just can carry out normal running.

Physical link in the microwave network extensively adopts Adaptive Modulation (AM, Adaptive Modulation) technology.In general, the modulation format of signal is high more, is subjected to the influence of external interference big more.When channel quality is good (as fine day), inchoation equipment will adopt the high modulation pattern, transmit more customer service as possible, to improve the efficiency of transmission and the availability of frequency spectrum of system; When channel quality degrades (as thunderstorm, foggy weather), make a start and adopt the low modulation pattern, to improve antijamming capability of link, only guarantee the link availability of high-priority service this moment.Under identical channel spacing, modulating mode difference, the bandwidth of air-interface of microwave are also different, and modulating mode is high more, and transmissible service bandwidth is high more.Promptly in the microwave network that adopts adaptive modulation technology, link bandwidth is not what fix, but changes along with the variation of modulating mode.

In research and practice process to prior art, the present inventor finds, because the link bandwidth in the microwave network may change at any time, and the bandwidth of every link needs the people for pre-setting in the existing DBA technology, be that link bandwidth is fixed, so,, then may cause network unavailable if come computation bandwidth to distribute according to fixing link bandwidth; For example, link bandwidth is 100M in the time of initial, so the DBA control appliance is that customer service has been distributed the 100M bandwidth when calculating, has only 50M if modulating mode switches the back bandwidth, then this moment, transmitting terminal can't encapsulate business according to the 100M bandwidth, can only abandon business; If modulating mode switches the back bandwidth again 200M is arranged, and customer service still can only be sent out 100M, the waste that this has caused link capacity again makes the AM technology lose meaning originally; That is to say that existing DBA technology also is not suitable for microwave network.

Summary of the invention

The embodiment of the invention provides a kind of distribution method of dynamic bandwidth, device and system, goes for microwave network.

A kind of distribution method of dynamic bandwidth comprises:

Obtain the expection link bandwidth and the current bandwidth request of each bar link in the network;

Carry out allocated bandwidth calculating according to described expection link bandwidth and current bandwidth request, obtain bandwidth map;

Described bandwidth map is sent to the sending ending equipment and the receiving device of each bar link in the microwave network, so that carry out allocated bandwidth.

A kind of DBA control appliance,

Acquiring unit, the expection link bandwidth and the current bandwidth request that are used for obtaining each bar link of network;

Arithmetic element, allocated bandwidth calculating is carried out in the expection link bandwidth and the current bandwidth request that are used for getting access to according to acquiring unit, obtains bandwidth map;

Transmitting element, the bandwidth map that arithmetic element is calculated sends to the sending ending equipment and the receiving device of each bar link in the microwave network, so that carry out allocated bandwidth.

A kind of microwave system comprises:

The DBA control appliance, be used for obtaining the expection link bandwidth and the current bandwidth request of each bar link of microwave network, carry out allocated bandwidth calculating according to expection link bandwidth and current bandwidth request, obtain bandwidth map, this bandwidth map is sent to sending ending equipment and receiving device, so that carry out allocated bandwidth;

Sending ending equipment, be used for generating the current bandwidth request according to each professional demand of microwave network, sending this current bandwidth request to the DBA control appliance, and receive the bandwidth map that the DBA control appliance returns, is each traffic assignments bandwidth according to this bandwidth map.

The embodiment of the invention adopts the expection link bandwidth and the current bandwidth request of dynamically obtaining each bar link in the network, calculates bandwidth map according to expection link bandwidth and current bandwidth request then, so that carry out Dynamic Bandwidth Allocation; Owing to can dynamically obtain link bandwidth, so with respect to coming for the computation bandwidth map according to the fixed-bandwidth that presets in the existing scheme, can avoid not causing the wasting of resources or the disabled problem of microwave network owing to being inconsistent at the link bandwidth that uses this bandwidth map moment of this bandwidth map link bandwidth constantly and calculating, make and the dynamic assignment that in microwave network, to carry out bandwidth can make full use of link circuit resource again.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the flow chart of the distribution method of dynamic bandwidth that provides of the embodiment of the invention one;

Fig. 2 is the flow chart of the distribution method of dynamic bandwidth that provides of the embodiment of the invention two;

Fig. 3 a is the block diagram of the microwave system that provides of the embodiment of the invention three;

Fig. 3 b is the flow chart of the distribution method of dynamic bandwidth that provides of the embodiment of the invention three;

Fig. 4 a is the block diagram of the microwave system that provides of the embodiment of the invention four;

Fig. 4 b is the flow chart of the distribution method of dynamic bandwidth that provides of the embodiment of the invention four;

Fig. 5 a is the structural representation of the DBA control appliance that provides of the embodiment of the invention;

Fig. 5 b is the structural representation of the DBA control appliance that provides of the embodiment of the invention;

Fig. 6 a is the structural representation of the sending ending equipment that provides of the embodiment of the invention;

Fig. 6 b is the structural representation of the sending ending equipment that provides of the embodiment of the invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

The embodiment of the invention provides a kind of distribution method of dynamic bandwidth, device and system.Below be elaborated respectively.

Embodiment one,

Present embodiment will be described from the angle of DBA control appliance (being also referred to as the DBA control unit).

A kind of distribution method of dynamic bandwidth, comprise: the expection link bandwidth and the current bandwidth request of obtaining each bar link in the microwave network, according to this expection link bandwidth and current bandwidth request, employing is preset strategy and is carried out allocated bandwidth calculating, obtain bandwidth map, the bandwidth map that calculates is sent to sending ending equipment and receiving device, so that carry out allocated bandwidth.

Referring to Fig. 1, idiographic flow can be as follows:

101, obtain the expection link bandwidth and the current bandwidth request of each bar link in the microwave network; Specifically can adopt following any one mode:

(1) sending ending equipment by each bar link in the microwave network calculates the expection link bandwidth, and generates the current bandwidth request, and the DBA control appliance directly obtains this expection link bandwidth and current bandwidth request from sending ending equipment then, promptly can be as follows:

Receive the expection link bandwidth and the current bandwidth request of the sending ending equipment transmission of each bar link in the microwave network, wherein, this expection link bandwidth is that soon the modulating mode and the significant character rate of switching calculate sending ending equipment according to sending link.The current bandwidth request then can be generated according to each professional real-time requirement by sending ending equipment, for example, sending ending equipment can obtain the average arrival rate in professional instantaneous or a period of time by the methods such as the degree of depth of monitoring business buffer memory, generates bandwidth request according to this arrival rate.

It should be noted that, for convenience, in embodiments of the present invention, will send the modulating mode that modulating mode that link is about to switch is called expection.Sending ending equipment is called the expection link bandwidth according to the modulating mode of the expection that sends link and the link bandwidth that the significant character rate is estimated, and wherein, concrete evaluation method can not repeat them here referring to prior art.

(2) generate the current bandwidth request by sending ending equipment, send to the DBA control appliance then, but expect that link bandwidth then is self to be calculated by the DBA control appliance, promptly can be as follows:

On the one hand, the DBA control appliance obtains the modulating mode and the significant character rate of each bar link expection in the microwave network, and modulating mode and the significant character rate according to expection calculates the expection link bandwidth then; On the other hand, the DBA control appliance receives the current bandwidth request of the sending ending equipment transmission of each bar link in the microwave network; Wherein, this current bandwidth request can be generated according to each professional real-time requirement by sending ending equipment, and for example, sending ending equipment can be by the methods such as the degree of depth of monitoring business buffer memory, obtain the average arrival rate in professional instantaneous or a period of time, generate bandwidth request according to this arrival rate.

The mode of obtaining the modulating mode of expection is specifically as follows: obtain the current link quality information that the receiving device of each bar link in the microwave network reports, determine the modulating mode of each bar link expection according to current link quality information.

For example, receiving device can be monitored the performance parameter that receives microwave signal, such as signal to noise ratio (SNR, Signal Noise Ratio) value, then these performance parameters are reported sending ending equipment or DBA control appliance,, utilize and preset strategy and need to determine the modulating mode that uses according to these performance parameters by sending ending equipment or DBA control appliance.Wherein, this presets strategy and can be provided with according to the demand of practical application.

Optionally, can also utilize link actual allocated bandwidth that the modulating mode of link is carried out FEEDBACK CONTROL, promptly obtain expection modulating mode mode specifically also can for:

Obtain the link quality information that the receiving device of each bar link in the microwave network reports; According to the definite modulating mode that may adopt of link quality information; Calculate the estimation link bandwidth of each bar link according to the modulating mode that may adopt and significant character rate; Estimation link bandwidth and current bandwidth request according to each bar link distribute bandwidth, obtain link actual allocated bandwidth (the bandwidth sum that in fact this link actual allocated bandwidth distributes for each business on this link); According to the lowest modulation pattern that the actual allocated bandwidth calculation of each bar link can satisfy the demands, promptly this lowest modulation pattern is as the modulating mode of expection.

Wherein, link quality information refers to the various information that can react the link quality condition, such as the various performance parameters of microwave signal, as SNR value etc.

The significant character rate refer to except expense can transport service symbol (symbol) speed, the several positions of symbology (bit) are determined by modulating mode, such as, at quarternary phase-shift keying (QPSK) (QPSK, Quadrature Phase Shift Keying) the next symbol of pattern can be represented 2 bit, and a symbol under 256 quadrature amplitude modulation (QAM, Quadrature Amplitude Modulation) pattern is then represented 8 bit (because 256=2 ⁸).The significant character rate of spectrum width correspondence all may be different under different frame formats defines or under the different modulating modes, such as, suppose the corresponding 7M significant character of 7MHz spectrum width rate, capacity corresponding is 7*2=14Mbit/s just under the QPSK pattern so, and capacity corresponding then is 7*8=56Mbit/s under the 256QAM pattern.

102, carry out allocated bandwidth calculating according to expection link bandwidth that gets access in the step 101 and current bandwidth request, obtain and the corresponding allocated bandwidth result of bandwidth request, since this allocated bandwidth bearing reaction each professional actual obtainable bandwidth, so be called as bandwidth map;

For example, specifically can be according to expection link bandwidth that gets access to and current bandwidth request, employing is preset strategy and is carried out allocated bandwidth calculating, wherein, presetting strategy can be provided with according to the demand of practical application, seize such as just carrying out bandwidth according to the priority of business, or the like.

103, the bandwidth map that obtains is sent to the sending ending equipment and the receiving device of each bar link in the microwave network, so that carry out allocated bandwidth, concrete bandwidth allocation methods can not repeat them here referring to prior art.It should be noted that the allocated bandwidth here except referring to calculate the new bandwidth for professional, also comprises the handoff procedure of the new bandwidth of link.

As from the foregoing, present embodiment adopts the expection link bandwidth and the current bandwidth request of dynamically obtaining each bar link in the microwave network, calculates bandwidth map according to expection link bandwidth and current bandwidth request then, so that carry out Dynamic Bandwidth Allocation; Owing to can dynamically obtain the expection link bandwidth, so with respect to coming for the computation bandwidth map according to the fixed-bandwidth that presets in the existing scheme, can avoid not causing the wasting of resources or the disabled problem of microwave network owing to being inconsistent at the link bandwidth that uses this bandwidth map moment of this bandwidth map link bandwidth constantly and calculating, make and the dynamic assignment that in microwave network, to carry out bandwidth can make full use of link circuit resource again.

Embodiment two,

Present embodiment will be described from the angle of sending ending equipment.

A kind of distribution method of dynamic bandwidth, comprise: generate bandwidth request according to each professional demand in the microwave network, sending this bandwidth request to the DBA control appliance, receive the bandwidth map that the DBA control appliance returns, is each traffic assignments bandwidth according to the bandwidth map that receives.

As shown in Figure 2, idiographic flow can be as follows:

201, generate the current bandwidth request according to each professional demand in the microwave network;

For example, can obtain the average arrival rate in professional instantaneous or a period of time, generate the current bandwidth request according to this arrival rate by the methods such as the degree of depth of monitoring business buffer memory.

202, the DBA control appliance is given in the current bandwidth request that obtains of forwarding step 201;

203, receive the bandwidth map that the DBA control appliance returns;

Wherein, this bandwidth map be by the DBA control appliance according to the expection link bandwidth of each bar link in the microwave network that gets access to and the current bandwidth request that receives, adopt and preset that strategy calculates.Wherein, presetting strategy can be provided with according to the demand of practical application, seize such as just carrying out bandwidth according to the priority of business, or the like.

204, be each traffic assignments bandwidth according to the bandwidth map that receives.Concrete bandwidth allocation methods can not repeat them here referring to prior art.

The DBA control appliance is when the computation bandwidth map, except the bandwidth request that needs the transmission of receiving end/sending end equipment, also need to obtain the expection link bandwidth, this expection link bandwidth can be calculated by modulating mode and the significant character rate of DBA control appliance self according to the expection of microwave network, also can provide by sending ending equipment, promptly optional, sending ending equipment can also calculate the expection link bandwidth, to expect that then link bandwidth sends to the DBA control appliance, promptly this distribution method of dynamic bandwidth can also comprise step 205～207;

205, obtain the modulating mode and the significant character rate of the expection of microwave network;

Wherein, the modulating mode that obtains the expection of microwave network specifically can comprise: obtain the link quality information of each bar link of microwave network, determine the modulating mode of expection according to link quality information.

Wherein, link quality information refers to the various information that can react the link quality condition, such as the various performance parameters of microwave signal, as SNR value etc.For example, receiving device can be monitored the performance parameter that receives microwave signal, then these performance parameters is reported sending ending equipment, and according to these performance parameters, the modulating mode that strategy need to determine use is preset in utilization by sending ending equipment.Wherein, this presets strategy and can be provided with according to the demand of practical application.

206, modulating mode and the significant character rate according to the expection that gets access to calculates the expection link bandwidth;

207, should expect that link bandwidth was notified to the DBA control appliance, so that the DBA control appliance adopts and presets the policy calculation bandwidth map according to this expection link bandwidth and current bandwidth request.

Wherein, generate current bandwidth request and calculating expection link bandwidth, send the current bandwidth request and send and expect that the execution of steps such as link bandwidth can be in no particular order, i.e. the execution of step 201～203 and step 205～206 in no particular order.

As from the foregoing, present embodiment adopts according to each professional demand in the microwave network and generates the current bandwidth request, and send to the DBA control appliance, by receive the DBA control appliance according to current bandwidth request carry out Dynamic Bandwidth Allocation control, realize in microwave network, carrying out the purpose of the dynamic assignment of bandwidth, improved the utilance of link in the microwave network.

Embodiment three,

According to embodiment one and two described methods, below will be described in further detail for example.

Shown in Fig. 3 a, the microwave system of present embodiment can comprise sending ending equipment, receiving device and DBA control appliance (being also referred to as the DBA control unit).

Wherein, sending ending equipment can comprise traffic monitoring module (being also referred to as monitoring unit), multiple connection module (being also referred to as Multi-connection unit), sending module (being also referred to as transmitting element), send control module (being also referred to as sending controling unit) and link bandwidth computing module (being also referred to as the link bandwidth computing unit); Receiving device can comprise receiver module (being also referred to as receiving element), separate the multiple connection module (be also referred to as and separate Multi-connection unit) and receive control module (be also referred to as and receive control unit); At least can comprise allocated bandwidth computing module (being also referred to as the allocated bandwidth computing unit) in the DBA control appliance; As follows:

(1) sending ending equipment

Sending ending equipment, be used for generating the current bandwidth request according to each professional demand of microwave network, send the current bandwidth request to the DBA control appliance, receive the bandwidth map that the DBA control appliance returns, according to bandwidth map is each traffic assignments bandwidth, such as, can business be mapped in the multiple connection frame according to bandwidth map, send to receiving device then and with the multiple connection frame; This sending ending equipment also is used for determining by the performance parameter of the microwave signal that receives the receiving device feedback modulating mode of expection, modulating mode and significant character rate according to expection calculates corresponding expection link bandwidth then, and should expect that link bandwidth offered the DBA control appliance.Specifically can not repeat them here referring to prior art.

This sending ending equipment can comprise as lower module:

1, traffic monitoring module is used for generating the current bandwidth request according to each professional demand;

For example, can obtain the average arrival rate in professional instantaneous or a period of time, reach speed according to these then and generate bandwidth request, and the current bandwidth request is sent to the DBA control appliance by the methods such as the degree of depth of monitoring business buffer memory.

2, multiple connection module is used to receive the bandwidth map that DBA equipment returns, and according to bandwidth map designated bandwidth size or time slot position business datum is mapped in the multiple connection frame.

3, sending module, the multiple connection frame that is used for that the multiple connection module is obtained sends to the receiver module of receiving device.

4, send control module, be used to receive the performance parameter of the microwave signal of receiving device feedback, according to these performance parameters with preset strategy and determine to be about to the modulating mode that switches; Wherein, performance parameter can be a SNR value etc., presets strategy and then can be provided with according to the demand of practical application.

For example, can and preset strategy according to the SNR value and determine whether that needs improve or reduce the modulating mode of transmission signal, as follows:

Can set the SNR threshold value that raises modulating mode is 20dB, and the thresholding of downward modulation modulating mode is 10dB, so, if the SNR value that receiving device feeds back is greater than 20dB, illustrate that signal quality is better, then raise modulating mode, such as being transferred to 128QAM from 64QAM; If the SNR value that receiving device feeds back less than 10dB, illustrates that signal quality is relatively poor, then reduce modulating mode, such as being lowered to 64QAM from 128QAM.Improve modulating mode and can increase the bandwidth that sends signal, but can reduce interference resistance to external world; Reduce modulating mode and can improve signal quality (promptly interference resistance to external world strengthens), but the bandwidth that can send signal relatively also can reduce.

In addition, if modulating mode changes, the new modulating mode that sending control module also needs to be about to switch is set in sending module and the link capacity computing module, and the new modulating mode that will soon switch sends receiving device to.

5, link bandwidth computing module, be used for calculating respective links bandwidth (being also referred to as link capacity) according to the modulating mode and the significant character rate of expection, to expect that the link bandwidth value sends to the DBA control appliance, concrete send mode can be the in-band communications mode, also can be the out-of-band communication mode.

Wherein, the significant character rate be meant except expense can transport service character rate, the several bit of symbology are determined by modulating mode, just represent 2 bit such as the next symbol of QPSK pattern, a symbol under the 256QAM pattern is then represented 8 bit.The significant character rate of spectrum width correspondence all may be different under definition of different frame format or different modulating mode, here suppose the corresponding always 7M significant character of 7MHz spectrum width rate, the QPSK capacity corresponding is 7*2=14Mbit/s just so, and the 256QAM capacity corresponding is 7*8=56Mbit/s just.

(2) receiving device

Receiving device, be used to monitor the performance parameter that receives microwave signal, these performance parameters are sent to sending ending equipment, multiple connection frame and modulating mode that receiving end/sending end equipment sends, and the bandwidth map that receives the transmission of DBA control appliance, according to modulating mode and bandwidth map the multiple connection frame is separated mapping, and the business datum after the mapping is separated in output.

This receiving device can comprise as lower module:

1, receiver module is used to monitor the performance parameter that receives microwave signal, such as the SNR value, this performance parameter is sent to the reception control module; Also be used for the multiple connection frame that receiving end/sending end equipment sends, and be transmitted to and separate the multiple connection module.

2, receive control module, the performance parameter of receiver module transmission is sent to the transmission control module of sending ending equipment by backward channel; The modulating mode that the transmission control module of receiving end/sending end equipment sends sends to receiver module with modulating mode, so that receiver module carries out the signal demodulation according to this modulating mode;

3, separate the multiple connection module, be used to receive the bandwidth map that the DBA control appliance returns, from the multiple connection frame, each business is separated mapping according to specified amount of bandwidth of bandwidth map or time slot position and come out.

(3) DBA control appliance

The DBA control appliance is used for current bandwidth request and expection link bandwidth (being also referred to as link capacity) that receiving end/sending end equipment sends, dynamically is each traffic assignments bandwidth according to presetting strategy, bandwidth request and link bandwidth.This DBA control appliance comprises the allocated bandwidth computing module at least;

The allocated bandwidth computing module, be used for according to current bandwidth request and expection link bandwidth, employing is preset strategy and is each traffic assignments bandwidth, but will guarantee that the bandwidth sum that actual allocated is gone out on each bar link can not surpass this link bandwidth (i.e. the total capacity of this link expection).

Wherein, this presets strategy and can be provided with according to the demand of practical application, for example, can just carry out bandwidth according to each professional priority seizes, such as, if link 1 original link capacity is 100Mbps, the business of process link 1 comprises business 1 and business 2, wherein, professional 1 priority is higher than professional 2 priority, if the bandwidth request of this moment professional 1 and business 2 all is 60Mbps so, then at first 60Mbps can be distributed to business 1, just will consider then and distribute to professional 2, because remaining bandwidth has only 40Mbps, therefore, though professional 2 bandwidth request also is 60Mbps, in fact only can distribute 40Mbps to give professional 2.

It should be noted that compared with prior art, the DBA control appliance has increased the module that can obtain the expection link bandwidth.In the past, the calculating that just can trigger the DBA control appliance had taken place to change in the bandwidth request of having only business to report, and now, even professional bandwidth request does not change, the expection link bandwidth has changed can cause that also the DBA control appliance is again to the traffic assignments bandwidth.Give one example, if link 1 original link bandwidth is 100Mbps, business through link 1 comprises professional 1 and professional 2, wherein, professional 1 priority is identical with the priority of business 2, professional 1 and professional 2 bandwidth request all is 60Mbps, so give professional 1 and professional 2 all to distribute the 50Mbps bandwidth by weight.At the DBA of a new round in the information gathering cycle, link 1 total bandwidth has been reduced to 80Mbps, though the bandwidth request of this moment professional 1 and professional 2 still remains unchanged, but the allocated bandwidth computing module still can recomputate professional 1 and professional 2 distribution bandwidth, and promptly professional 1 and professional 2 bandwidth that obtain all become 40Mbps.

If this microwave system is a system that has master slave relation, then this DBA control appliance can be arranged in the host node so that whole microwave system is controlled, other from node then as sending ending equipment or receiving device.

Below will describe for example, referring to Fig. 3 b, the idiographic flow of this distribution method of dynamic bandwidth can be as follows:

301, the monitoring of the receiver module of receiving device receives the SNR value of microwave signal, this SNR value is sent to the reception control module of receiving device;

302, receive the transmission control module that control module sends the SNR value to by backward channel sending ending equipment.

303, send control module according to SNR value with preset strategy and determine the modulating mode of expection (being about to the modulating mode of switching), such as according to the SNR value with preset strategy and determine whether that needs improve or reduce the modulating mode that sends signal, if not, determine that then the modulating mode of expecting is identical with original modulating mode; If then raising or reduction send the modulating mode of signal, obtain new modulating mode, with the modulating mode of this new modulating mode as expection.

For example, can set the SNR threshold value that raises modulating mode is 20dB, and the thresholding of downward modulation modulating mode is 10dB, so, if the SNR value that the reception control module feeds back then raises modulating mode, such as being transferred to 128QAM from 64QAM greater than 20dB; If receive SNR value that control module feeds back, then reduce modulating mode, such as being lowered to 64QAM, if the SNR value that the reception control module feeds back between 10dB and 20dB, then keeps original modulating mode constant from 128QAM less than 10dB.

304, send control module the modulating mode of expection is sent to the link bandwidth computing module, and original modulating mode is continued to be set in the sending module, and original modulating mode is continued to send to reception control module in the receiving device.After modulating mode switched, just the modulating mode with expection sent sending module and receiving device to.

It should be noted that, in order to save signaling process, improve treatment effeciency, for original modulating mode, if the modulating mode of expection does not change, the modulating mode that then can not send this expection is to the reception control module in sending module, link bandwidth computing module and the receiving device.

305, the link bandwidth computing module calculates corresponding expection link bandwidth according to the modulating mode of expection and the significant character rate of spectrum width correspondence, will expect that link bandwidth sends to the DBA control appliance by in-band communications mode or out-of-band communication mode.

306, the traffic monitoring module in the sending ending equipment generates the current bandwidth request according to each professional demand in the microwave network, and should current bandwidth request give the DBA control appliance.

The execution sequence of step 306 and step 301～305 in no particular order.

307, the DBA control appliance receives the expection link bandwidth that the link bandwidth computing module sends, and the current bandwidth request that receives the transmission of traffic monitoring module, then according to this expection link bandwidth and current bandwidth request, utilization is preset strategy and is carried out allocated bandwidth calculating, obtains and the corresponding bandwidth map of current bandwidth request.

308, the DBA control appliance sends to the bandwidth map that obtains and separates the multiple connection module in multiple connection module in the sending ending equipment and the receiving device; Certainly, can also send other parameter informations relevant to separating the multiple connection module in multiple connection module in the sending ending equipment and the receiving device with link.

309, multiple connection module receives bandwidth map, and amount of bandwidth or the time slot position specified according to the bandwidth map that receives are mapped to business in the multiple connection frame, and the multiple connection frame is sent to sending module.

310, sending module sends the multiple connection frame to the receiver module of receiving device.

311, receiver module sends the multiple connection frame to and separates the multiple connection module

312, separate the multiple connection module and from the multiple connection frame, each business is separated mapping according to specified amount of bandwidth of the bandwidth map that receives or time slot position and come out, and the business datum after exporting this and separating mapping.

As from the foregoing, present embodiment adopts the expection link bandwidth and the current bandwidth request of dynamically obtaining each bar link, and then according to expection link bandwidth and current bandwidth request, employing is preset strategy and calculated bandwidth map, so that carry out Dynamic Bandwidth Allocation; Owing to can dynamically obtain the expection link bandwidth, so with respect to coming for the computation bandwidth map according to the fixed-bandwidth that presets in the existing scheme, can avoid not causing the wasting of resources or the disabled problem of microwave network owing to being inconsistent at the link bandwidth that uses this bandwidth map moment of this bandwidth map link bandwidth constantly and calculating, make microwave system when keeping its original Adaptive Modulation function, can carry out the dynamic assignment of bandwidth again, promptly use this scheme can make full use of link circuit resource, improved the treatment effeciency of whole microwave system.

Embodiment four,

Different with embodiment three is in embodiment three, to be to determine modulating mode by sending ending equipment, and in the present embodiment, mainly to be determined the modulating mode of expection by DBA control appliance (being also referred to as the DBA control unit); In the present embodiment promptly, the receiving device of every section link will be with the performance parameter of received signal, report the DBA control appliance as SNR primary system one, determine whether needing to adjust the modulating mode of this link by it, and new modulating mode and bandwidth map unification are handed down to each node (comprising sending ending equipment and receiving device) by the DBA control appliance.

Shown in Fig. 4 a, similar with embodiment three, the microwave system of present embodiment also can comprise sending ending equipment, receiving device and DBA control appliance (being also referred to as the DBA control unit).

Wherein, sending ending equipment can comprise traffic monitoring module (being also referred to as the traffic monitoring unit), multiple connection module (being also referred to as Multi-connection unit) and sending module (being also referred to as transmitting element); Receiving device can comprise receiver module (being also referred to as receiving element) reconciliation multiple connection module (be also referred to as and separate Multi-connection unit); Except comprising allocated bandwidth computing module (being also referred to as the allocated bandwidth computing unit), also comprise link modulating mode decision-making module (being also referred to as link modulating mode decision package) in the DBA control appliance; As follows:

(1) sending ending equipment

Sending ending equipment, be used for generating bandwidth request according to each professional demand of microwave network, send the current bandwidth request to the DBA control appliance, receive the bandwidth map that the DBA control appliance returns, according to bandwidth map is each traffic assignments bandwidth, such as, can business be mapped in the multiple connection frame according to bandwidth map, send to receiving device then and with the multiple connection frame; Specifically can not repeat them here referring to prior art.

This sending ending equipment is specifically as follows equipment such as base station or terminal, can comprise as lower module:

1, traffic monitoring module is used for generating bandwidth request according to each professional demand;

For example, can obtain the average arrival rate in professional instantaneous or a period of time, reach speed according to these then and generate the current bandwidth request, and the current bandwidth request is sent to the DBA control appliance by the methods such as the degree of depth of monitoring business buffer memory.

(2) receiving device

Receiving device, be used to monitor the performance parameter that receives microwave signal, these performance parameters are sent to the DBA control appliance, multiple connection frame and modulating mode that receiving end/sending end equipment sends, and the bandwidth map that receives the transmission of DBA control appliance, according to modulating mode and bandwidth map the multiple connection frame is separated mapping, and the business datum after the mapping is separated in output.

This receiving device can comprise as lower module:

1, receiver module is used to monitor the performance parameter that receives microwave signal, such as the SNR value, this performance parameter is sent to link modulating mode decision-making module in the DBA control appliance; Also be used for the new modulating mode index signal that multiple connection frame that receiving end/sending end equipment sends and DBA control module send, switch the back according to new modulating mode demodulation multiple connection frame, and be transmitted to and separate the multiple connection module at modulating mode.

2, separate the multiple connection module, be used for receiving the bandwidth map that the allocated bandwidth computing module of DBA control appliance returns, from the multiple connection frame, each business is separated mapping according to specified amount of bandwidth of bandwidth map or time slot position and come out.

(3) DBA control appliance

The DBA control appliance, be used for receiving the performance parameter of the microwave signal that receiver module sent of receiving device, according to these performance parameters and the modulating mode that presets the definite expection of strategy, calculate corresponding expection link bandwidth according to the modulating mode of expection and the significant character rate of spectrum width correspondence, after the current bandwidth request that receives the sending ending equipment transmission, dynamically be each traffic assignments bandwidth according to presetting strategy, bandwidth request and expection link bandwidth.

This DBA control appliance comprises link modulating mode decision-making module and allocated bandwidth computing module, and is as follows:

Link modulating mode decision-making module, be used to receive the performance parameter of the microwave signal of receiving device feedback, according to these performance parameters and the modulating mode that presets the definite expection of strategy, modulating mode and significant character rate according to expection calculates corresponding expection link bandwidth then, will expect that link bandwidth sends to the allocated bandwidth computing module.Wherein, performance parameter can be a SNR value etc., presets strategy and then can be provided with according to the demand of practical application.

Can set the SNR threshold value that raises modulating mode is 20dB, and the thresholding of downward modulation modulating mode is 10dB, so, if the SNR value that receiving device sends then raises modulating mode, such as being transferred to 128QAM from 64QAM greater than 20dB; If the SNR value that receiving device sends is then reduced modulating mode, such as being lowered to 64QAM from 128QAM less than 10dB.Improve modulating mode and can increase the bandwidth that sends signal, but can reduce interference resistance to external world; Reduce modulating mode and can improve signal quality (promptly interference resistance to external world strengthens), but the bandwidth that can send signal relatively also can reduce.

In addition, if modulating mode changes, the new modulating mode that link modulating mode decision-making module obtains after also needing to change sends to sending module in the sending ending equipment and the receiver module in the receiving device.

The allocated bandwidth computing module, be used to receive the current bandwidth request of traffic monitoring module transmission and the expection link bandwidth that link modulating mode decision-making module sends, according to this current bandwidth request and expection link bandwidth, employing is preset strategy and is each traffic assignments bandwidth, but will guarantee that the bandwidth sum that actual allocated is gone out on each bar link can not surpass this expection link bandwidth.

Wherein, this presets strategy and can be provided with according to the demand of practical application, for example, can just carry out bandwidth according to each professional priority and seize, and specifically can not repeat them here referring to embodiment three.

It should be noted that compared with prior art, the DBA control appliance has increased a module of obtaining the expection link bandwidth.In the past, the calculating that just can trigger the DBA control appliance had taken place to change in the bandwidth request of having only business to report, and now, even professional bandwidth request does not change, the expection link bandwidth has changed can cause that also the DBA control appliance is again to the traffic assignments bandwidth.In addition,, then this DBA control appliance can be arranged in the host node if this microwave system is a system that has master slave relation so that whole microwave system is controlled, other from node then as sending ending equipment or receiving device.

Below will describe for example, referring to Fig. 4 b, the idiographic flow of this distribution method of dynamic bandwidth can be as follows:

401, the monitoring of the receiver module of receiving device receives the SNR value of microwave signal, this SNR value is sent to the link modulating mode decision-making module of DBA control appliance;

402, link modulating mode decision-making module is according to the SNR value with preset the modulating mode that strategy is determined expection, such as according to the SNR value with preset strategy and determine whether that needs improve or reduce the modulating mode that sends signal, if not, determine that then the modulating mode of expecting still is original modulating mode; If then raising or reduction send the modulating mode of signal, obtain new modulating mode, with the modulating mode of this new modulating mode as expection.For example, can set the SNR threshold value that raises modulating mode is 20dB, and the thresholding of downward modulation modulating mode is 10dB, so, if the SNR value that the reception control module feeds back then raises modulating mode, such as being transferred to 128QAM from 64QAM greater than 20dB; If receive SNR value that control module feeds back, then reduce modulating mode, such as being lowered to 64QAM, if the SNR value that the reception control module feeds back between 10dB and 20dB, then keeps original modulating mode constant from 128QAM less than 10dB.

403, link modulating mode decision-making module sends to sending module in the sending ending equipment and the receiver module in the receiving device with the modulating mode of expection.

It should be noted that,, improve treatment effeciency, for original modulating mode,, then can not send this modulating mode to sending module and receiver module if the modulating mode of expection does not change in order to save signaling process; Only when the modulating mode of expection changed, just the modulating mode with expection sent to sending module and receiver module.

404, link modulating mode decision-making module calculates corresponding expection link bandwidth according to the modulating mode and the significant character rate of expection, and should expect that link bandwidth sent to the allocated bandwidth computing module.

405, the traffic monitoring module in the sending ending equipment generates current bandwidth request according to each professional demand in the microwave network, and gives allocated bandwidth computing module in the DBA control appliance with this bandwidth request.

The execution sequence of step 405 and step 401～404 in no particular order.

406, the allocated bandwidth computing module receives the expection link bandwidth that link modulating mode decision-making module sends, and the current bandwidth request that receives the transmission of traffic monitoring module, according to this expection link bandwidth and current bandwidth request, utilization is preset strategy and is carried out allocated bandwidth calculating, obtains and the corresponding bandwidth map of bandwidth request.

407, the allocated bandwidth computing module sends to the bandwidth map that obtains and separates the multiple connection module in multiple connection module in the sending ending equipment and the receiving device; Certainly, can also send other parameter informations relevant to separating the multiple connection module in multiple connection module in the sending ending equipment and the receiving device with link.

408, multiple connection module receives bandwidth map, and amount of bandwidth or the time slot position specified according to the bandwidth map that receives are mapped to business in the multiple connection frame, and the multiple connection frame is sent to sending module.

409, sending module sends the multiple connection frame to the receiver module of receiving device.

410, receiver module sends the multiple connection frame to and separates the multiple connection module

411, separate the multiple connection module and from the multiple connection frame, each business is separated mapping according to specified amount of bandwidth of the bandwidth map that receives or time slot position and come out, and the business datum after exporting this and separating mapping.

As from the foregoing, the difference of present embodiment and embodiment three is, the associative operation of determining the expection modulating mode is detached out from the node device of each distribution, concentrate in the DBA control appliance and handle, so, present embodiment is except the beneficial effect that can realize embodiment three, further, owing to will determine to expect that associative operation such as modulating mode concentrates on handles in the DBA control appliance, institute helps improving whole microwave network performance so that the DBA control appliance carries out the integral body regulation and control to network.

Embodiment five,

On the basis of enforcement three and four, further, the bandwidth map that can also utilize the DBA control appliance to calculate obtains every link actual allocated bandwidth, and the modulating mode to link carries out FEEDBACK CONTROL again.Promptly obtain expection modulating mode mode specifically also can for:

Obtain the link quality information that the receiving device of each bar link in the microwave network reports; According to the definite modulating mode that may adopt of link quality information; Calculate the estimation link bandwidth of each bar link according to the modulating mode that may adopt and significant character rate; Estimation link bandwidth and current bandwidth request according to each bar link distribute bandwidth, obtain link actual allocated bandwidth; According to the lowest modulation pattern that the actual allocated bandwidth calculation of each bar link can satisfy the demands, promptly this lowest modulation pattern is as the modulating mode of expection.

For example, it is 64QAM that the link SNR value that the DBA control appliance transmits according to receiving device calculates the modulating mode that link is about to switching, and the respective links bandwidth is 32Mbit/s.The DBA control module calculates bandwidth map according to link bandwidth 32Mbit/s and bandwidth request then, distribute 10Mbit/s for example for professional A, distribute 5Mbit/s for professional B, distribute 8Mbit/s for professional C, so the actual amount of bandwidth that is assigned with equals 10+5+8=23Mbit/s on this link.Use the modulating mode link corresponding bandwidth of 64QAM that waste is arranged, and 32QAM modulating mode link corresponding bandwidth is 25Mbit/s, the bandwidth waste of comparing 64QAM is few, and the corresponding bandwidth of 16QAM has only 20Mbit/s, does not satisfy the actual allocated bandwidth that bandwidth map calculates.So select 32QAM at last, can not only satisfy the distribution requirements of link bandwidth, and use lower modulating mode can also improve the antijamming capability of signal as the modulating mode that is about to switch.

Again for example, if one link modulation format originally is 32QAM, the respective links bandwidth is 25M, because current link signal quality is better, and reached the thresholding that raises modulating mode, so the decision of link modulating mode decision package will expect that modulating mode switches to 64QAM, and the expection link bandwidth that calculates the 64QAM correspondence is 32M, then, the modulating mode decision package will expect that link bandwidth 32M sends to the allocated bandwidth computing unit, calculate new allocated bandwidth result for it.The allocated bandwidth computing unit is after receiving this expection link bandwidth 32M, can take all factors into consideration the professional bandwidth request own and the distribution condition of other links and carry out allocated bandwidth, such as, the business that this moment, the allocated bandwidth computing unit calculated on this link has only taken the 20M bandwidth among the 32M altogether, just do not need the expection modulating mode is really switched to 64QAM this moment so yet, but keep original 32QAM modulating mode, because the pairing 25M link bandwidth of original 32QAM modulating mode also can support the result of calculation of bandwidth map.Again such as, if the actual bandwidth that is assigned with is greater than 25M on this link that this moment, the allocated bandwidth computing unit calculated according to expection 32M link bandwidth, for example be 30M, then the link modulating mode can only switch to 64QAM could with the bandwidth map that calculated coupling, therefore final link modulating mode is confirmed as switching to 64QAM.

As from the foregoing, present embodiment is except the beneficial effect that can realize embodiment three and four, further, can also utilize link actual allocated bandwidth that the expection modulating mode of link is carried out FEEDBACK CONTROL, make that the Adaptive Modulation of microwave network is more flexible, can when improving the link circuit resource utilance, improve antijamming capability of link.

Embodiment six,

In order to implement above method better, the embodiment of the invention also provides a kind of DBA control appliance, and shown in Fig. 5 a, this DBA control appliance comprises acquiring unit 501, arithmetic element 502 and transmitting element 503;

Acquiring unit 501, the expection link bandwidth and the current bandwidth request that are used for obtaining each bar link of microwave network;

Arithmetic element 502, allocated bandwidth calculating is carried out in the expection link bandwidth and the current bandwidth request that are used for getting access to according to acquiring unit 501, obtains bandwidth map; For example, specifically can be according to expection link bandwidth that gets access to and current bandwidth request, employing is preset strategy and is carried out allocated bandwidth calculating, wherein, presetting strategy can be provided with according to the demand of practical application, seize such as just carrying out bandwidth according to the priority of business, or the like;

Transmitting element 503, the bandwidth map that arithmetic element 502 is calculated sends to the sending ending equipment and the receiving device of each bar link in the microwave network, so that carry out allocated bandwidth.It should be noted that the allocated bandwidth here except referring to calculate the new bandwidth for professional, also comprises the handoff procedure of the new bandwidth of link.

During concrete enforcement, can calculate the expection link bandwidth by sending ending equipment, and generate the current bandwidth request, should expect then that link bandwidth and current bandwidth request offered the DBA control appliance, that is:

Acquiring unit 501 specifically can be used for receiving expection link bandwidth and current bandwidth request that the sending ending equipment of each bar link of microwave network sends.

Wherein, to be sending ending equipment calculate according to the expection modulating mode and the significant character rate of microwave network this expection link bandwidth.The current bandwidth request then can be generated according to each professional demand by sending ending equipment, for example, sending ending equipment can obtain the average arrival rate in professional instantaneous or a period of time by the methods such as the degree of depth of monitoring business buffer memory, generates the current bandwidth request according to this arrival rate.

Except the above-mentioned method of obtaining expection link bandwidth and current bandwidth request, also can self come link bandwidth is calculated by the DBA control appliance, certainly, the current bandwidth request is still generated by sending ending equipment, promptly shown in Fig. 5 b, acquiring unit 501 can comprise and obtains subelement 5011, computation subunit 5012 and receive subelement 5013;

Obtain subelement 5011, be used for obtaining the modulating mode and the significant character rate of each bar link expection of microwave network;

For example, receiving device can be monitored the SNR value that receives microwave signal, what then the SNR value is reported the DB control appliance obtains subelement 5011, obtains subelement 5011 after receiving the SNR value, according to the SNR value with preset the modulating mode that strategy determines that needs use.Wherein, this presets strategy and can be provided with according to the demand of practical application.

Computation subunit 5012 is used for according to the significant character rate and obtains the expection link bandwidth that modulating mode that subelement 5011 gets access to calculates each bar link; Concrete computational methods can not repeat them here referring to prior art;

Receive subelement 5013, be used for the current bandwidth request that receiving end/sending end equipment sends; Wherein, this current bandwidth request then can be generated according to each professional demand by sending ending equipment;

This moment then, arithmetic element 502 specifically is used for obtaining expecting link bandwidth and receive the current bandwidth request that subelement 5013 receives according to computation subunit 5012, adopts to preset strategy and carry out allocated bandwidth and calculate, and obtains bandwidth map.Wherein, presetting strategy can be provided with according to the demand of practical application, seize such as just carrying out bandwidth according to the priority of business, or the like.

Optionally, can also utilize link actual allocated bandwidth that the modulating mode of link is carried out FEEDBACK CONTROL, promptly obtain subelement 5011 and can comprise and obtain the sub level unit, determine the sub level unit, estimate the sub level unit, distribute the sub level unit and calculate the sub level unit;

Obtain the sub level unit, be used for obtaining the link quality information that the receiving device of each bar link of microwave network reports; Wherein, link quality information refers to the various information that can react the link quality condition, such as the various performance parameters of microwave signal, as SNR value etc.

Determine the sub level unit, be used for according to obtaining the definite modulating mode that may adopt of link quality information that the sub level unit gets access to;

Estimate the sub level unit, be used for the estimation link bandwidth that definite modulating mode that may adopt in the definite sub level unit of basis and significant character rate calculate each bar link;

Distribute the sub level unit, be used for obtaining link actual allocated bandwidth according to current bandwidth request and the estimation link bandwidth assignment bandwidth of estimating each bar link that the sub level unit obtains;

Calculate the sub level unit, be used for the lowest modulation pattern that the actual allocated bandwidth calculation according to each the bar link that distributes the sub level unit to obtain can satisfy the demands, promptly this lowest modulation pattern is as the modulating mode of expection.

This moment then, computation subunit 5012 is used for according to the significant character rate of spectrum width correspondence and the modulating mode that calculates the expection that the sub level unit obtains calculates link bandwidth.

During concrete enforcement, more than each unit can be used as independent entity and realize, also can be integrated in some or the plurality of entity and realize, such as, obtain subelement 5011 and can be used as the link modulating mode decision-making module of implementing in four, computation subunit 5012, reception subelement 5012, arithmetic element 502 and transmitting element 503 then can be used as the allocated bandwidth computing module of implementing in four, or the like.

More than the concrete enforcement of each unit can not repeat them here referring to front embodiment.

As from the foregoing, acquiring unit 501 in the DBA control appliance of present embodiment can dynamically obtain the expection link bandwidth and the current bandwidth request of each bar link, then by arithmetic element 502 according to expection link bandwidth and current bandwidth request, employing is preset strategy and is calculated bandwidth map, so that carry out Dynamic Bandwidth Allocation; Owing to can dynamically obtain the expection link bandwidth, so with respect to coming for the computation bandwidth map according to the fixed-bandwidth that presets in the existing scheme, can avoid not causing the wasting of resources or the disabled problem of microwave network owing to being inconsistent at the link bandwidth that uses this bandwidth map moment of this bandwidth map link bandwidth constantly and calculating, make and the dynamic assignment that in microwave network, to carry out bandwidth can make full use of link circuit resource again.

Embodiment seven,

Correspondingly, the embodiment of the invention also provides a kind of sending ending equipment, and shown in Fig. 6 a, sending ending equipment comprises generation unit 601, transmitting element 602, receiving element 603 and allocation units 604;

Generation unit 601 is used for generating the current bandwidth request according to each professional demand of microwave network;

Transmitting element 602 is used to send the current bandwidth request of request generation unit 601 generations to the DBA control appliance;

Receiving element 603 is used to receive the bandwidth map that the DBA control appliance returns; Wherein, the current bandwidth request that to be the DBA control appliance send according to the expection link bandwidth that dynamically gets access to and transmitting element 602 of this bandwidth map calculates; Such as, the current bandwidth request that can send according to the expection link bandwidth that dynamically gets access to and transmitting element 602, adopt and preset that strategy calculates.Wherein, presetting strategy can be provided with according to the demand of practical application, seize such as just carrying out bandwidth according to the priority of business, or the like.

Allocation units 604, being used for according to the bandwidth map that receiving element 603 receives is each traffic assignments bandwidth.Concrete bandwidth allocation methods can not repeat them here referring to prior art.

Wherein, the accessed expection link bandwidth of DBA control appliance is except can self being calculated by the DBA control appliance, also can calculate by sending ending equipment, promptly, shown in Fig. 6 b, this sending ending equipment can also comprise acquiring unit 605, arithmetic element 606 and notification unit 607;

Acquiring unit 605 is used to obtain the modulating mode and the significant character rate of microwave network expection; Wherein, the significant character rate refer to except expense can transport service symbol speed, the several bit of symbology are determined by modulating mode;

Arithmetic element 606, the modulating mode and the significant character rate that are used for the expection that gets access to according to acquiring unit 605 calculate the expection link bandwidth; Concrete computational methods can not repeat them here referring to prior art;

Notification unit 607, the expection link bandwidth that is used for arithmetic element 606 is calculated is notified to the DBA control appliance, so that the DBA control appliance is according to this expection link bandwidth and current bandwidth request.

Then at this moment, receiving element 603 specifically is used to receive the bandwidth map that the DBA control appliance returns, wherein, the current bandwidth request that this bandwidth map expection link bandwidth that to be the DBA control appliance send according to notification unit 607 and transmitting element 602 send is adopted and is preset that strategy calculates;

Wherein, acquiring unit 605 can comprise and obtains subelement 6051 and definite subelement 6052;

Obtain subelement 6051, be used to obtain the link quality information of microwave network; Wherein, link quality information refers to the various information that can react the link quality condition, such as the various performance parameters of microwave signal, as SNR value etc.

Determine subelement 6052, be used for according to obtaining the definite modulating mode of expecting of link quality information that subelement 6051 gets access to.

During concrete enforcement, during concrete enforcement, more than each unit can be used as independent entity and realize, also can be integrated in some or the plurality of entity and realize, such as, generation unit 601 and transmitting element 602 can be used as the traffic monitoring module among embodiment three and four, receiving element 603 and allocation units 604 can be used as the multiple connection module among embodiment three and four, acquiring unit 605 can be used as the sending controling unit among the embodiment three, arithmetic element 606 and notification unit 607 can be used as the link bandwidth computing unit of implementing in three, or the like.

As from the foregoing, the generation unit 601 of present embodiment sending ending equipment can generate bandwidth request according to each professional demand in the microwave network, and send to the DBA control appliance by transmitting element 602, carry out Dynamic Bandwidth Allocation control by receiving the DBA control appliance according to bandwidth request, realize in microwave network, carrying out the purpose of the dynamic assignment of bandwidth, improved the utilance of link in the microwave network.

Embodiment eight,

Correspondingly, the embodiment of the invention also provides a kind of microwave system, comprises any one DBA control appliance and sending ending equipment that the embodiment of the invention provides.

The DBA control appliance, be used for obtaining the expection link bandwidth and the current bandwidth request of each bar link of microwave network, according to expection link bandwidth and current bandwidth request, employing is preset strategy and is carried out allocated bandwidth calculating, obtain bandwidth map, this bandwidth map is sent to sending ending equipment and receiving device, so that carry out allocated bandwidth; It should be noted that the allocated bandwidth here except referring to calculate the new bandwidth for professional, also comprises the handoff procedure of the new bandwidth of link.

This microwave system also comprises receiving device, be used to monitor the performance parameter that receives microwave signal, these performance parameters are sent to sending ending equipment or DBA control appliance, the modulating mode that receiving end/sending end equipment or DBA control appliance return, and receive the bandwidth map that the DBA control appliance sends.

This receiving device also is used for the multiple connection frame that receiving end/sending end equipment sends, and according to modulating mode and bandwidth map the multiple connection frame that receives is separated mapping, and the business datum after the mapping is separated in output.

Then this moment, sending ending equipment specifically is used for according to bandwidth map designated bandwidth size or time slot position business datum being mapped to the multiple connection frame, and the multiple connection frame is sent to receiving device.

Optionally, the DBA control appliance has dual mode when obtaining link bandwidth, and the one, self calculate gained by the DBA control appliance, the 2nd, calculate by sending ending equipment, as follows:

The DBA control appliance also is used to obtain the modulating mode and the significant character rate of the expection of microwave network, calculates link bandwidth according to the modulating mode and the significant character rate of expection; Such as, can monitor the performance parameter of microwave network by receiving device, as the SNR value, send to the DBA control appliance then, the DBA control appliance is according to the modulating mode and the significant character rate of the definite expection of these performance parameters, and modulating mode and the significant character rate according to expection calculates the expection link bandwidth then.

Perhaps,

Sending ending equipment also is used to obtain the modulating mode and the significant character rate of the expection of microwave network, calculates the expection link bandwidth according to the modulating mode and the significant character rate of this expection, will expect that link bandwidth sends to the DBA control appliance; Such as, can monitor the performance parameter of microwave network by receiving device, as the SNR value, send to sending ending equipment then, sending ending equipment is determined the modulating mode and the significant character rate of expection according to these performance parameters, modulating mode and significant character rate according to expection calculate the expection link bandwidth, then link bandwidth are sent to the DBA control appliance;

Then this moment, the DBA control appliance is used for the expection link bandwidth that receiving end/sending end equipment sends.

Below will make schematic illustration to the execution flow process of this microwave system for example, in this example, link bandwidth is calculated by sending ending equipment, and is as follows:

Step 1, receiving device monitoring receive the SNR value of microwave signal, and this SNR value is sent to sending ending equipment;

Step 2, sending ending equipment are according to the SNR value and preset strategy and determine whether that needs improve or reduce the modulating mode that sends signal, if not, determine that then the modulating mode of expection is original modulating mode; If then raising or reduction send the modulating mode of signal, obtain new modulating mode, with the modulating mode of this new modulating mode as expection.

Step 3, sending ending equipment send the modulating mode of expection to receiving device.

It should be noted that,, improve treatment effeciency,,, then can not send this modulating mode to receiving device if the modulating mode of expection does not change if for original modulating mode in order to save signaling process; Only when the modulating mode of expection changes, just new modulating mode is sent to receiving device.

Step 4, sending ending equipment calculate the respective links bandwidth according to the modulating mode and the significant character rate of expection, this respective links bandwidth is called the expection link bandwidth in embodiments of the present invention, should expect that link bandwidth sent to the DBA control appliance by in-band communications mode or out-of-band communication mode.

Piece generates the current bandwidth request according to each professional demand in the microwave network in step 5, the sending ending equipment, and should current bandwidth request give the DBA control appliance.

The execution sequence of step 5 and step 1～4 in no particular order.

Expection link bandwidth and current bandwidth request that step 6, DBA control appliance receiving end/sending end equipment send, then according to this expection link bandwidth and current bandwidth request, utilization is preset strategy and is carried out allocated bandwidth calculating, obtains and the corresponding bandwidth map of current bandwidth request.

Step 7, DBA control appliance send to sending ending equipment and receiving device with the bandwidth map that obtains.Certainly, can also send other parameter informations relevant in sending ending equipment and the receiving device with link.

Step 8, sending ending equipment receive bandwidth map, and amount of bandwidth or the time slot position specified according to the bandwidth map that receives are mapped to business in the multiple connection frame, and the multiple connection frame is sent to receiving device.

Step 9, receiving device receive the multiple connection frame, and from the multiple connection frame, each business is separated mapping according to specified amount of bandwidth of the bandwidth map that receives or time slot position and come out, and the business datum after exporting this and separating mapping.

As from the foregoing, the DBA control appliance of the microwave system of present embodiment can dynamically obtain expection link bandwidth and current bandwidth request, according to expection link bandwidth and current bandwidth request, employing is preset strategy and is calculated bandwidth map, so that carry out Dynamic Bandwidth Allocation then; Owing to can dynamically obtain the expection link bandwidth, so with respect to coming for the computation bandwidth map according to the fixed-bandwidth that presets in the existing scheme, can avoid not causing the wasting of resources or the disabled problem of microwave network owing to being inconsistent at the link bandwidth that uses this bandwidth map moment of this bandwidth map link bandwidth constantly and calculating, make and the dynamic assignment that in microwave network, to carry out bandwidth can make full use of link circuit resource again.

One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of the foregoing description is to instruct relevant hardware to finish by program, this program can be stored in the computer-readable recording medium, storage medium can comprise: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), disk or CD etc.

More than a kind of distribution method of dynamic bandwidth, device and system that the embodiment of the invention provided are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims

1. a distribution method of dynamic bandwidth is characterized in that, comprising:

Obtain the expection link bandwidth and the current bandwidth request of each bar link in the microwave network;

2. method according to claim 1 is characterized in that, described expection link bandwidth and current bandwidth request of obtaining each bar link in the microwave network comprises:

Receive the expection link bandwidth and the current bandwidth request of the sending ending equipment transmission of each bar link in the microwave network, the sending ending equipment that described expection link bandwidth is each bar link in the microwave network calculates according to the modulating mode and the significant character rate of expection.

3. method according to claim 1 is characterized in that, described expection link bandwidth and current bandwidth request of obtaining each bar link in the microwave network comprises:

Obtain the modulating mode and the significant character rate of each bar link expection in the microwave network;

The expection link bandwidth that calculates each bar link according to the modulating mode and the significant character rate of described expection;

Receive the current bandwidth request of the sending ending equipment transmission of each bar link in the microwave network.

4. method according to claim 3 is characterized in that, the modulating mode that obtains each bar link expection in the microwave network comprises:

Obtain the current link quality information that the receiving device of each bar link in the microwave network reports;

Determine the modulating mode of each bar link expection according to current link quality information.

5. method according to claim 3 is characterized in that, the modulating mode that obtains each bar link expection in the microwave network comprises:

Obtain the link quality information that the receiving device of each bar link in the microwave network reports;

According to the definite modulating mode that may adopt of link quality information;

Calculate the estimation link bandwidth of each bar link according to the modulating mode that may adopt and significant character rate;

Estimation link bandwidth and current bandwidth request according to each bar link distribute bandwidth, obtain link actual allocated bandwidth;

According to the lowest modulation pattern that the actual allocated bandwidth calculation of each bar link can satisfy the demands, promptly this lowest modulation pattern is as the modulating mode of expection.

6. a Dynamic Bandwidth Allocation control appliance is characterized in that, comprising:

Acquiring unit, the expection link bandwidth and the current bandwidth request that are used for obtaining each bar link of microwave network;

7. Dynamic Bandwidth Allocation control appliance according to claim 6 is characterized in that,

Described acquiring unit, specifically be used for receiving expection link bandwidth and current bandwidth request that the sending ending equipment of each bar link of microwave network sends, the sending ending equipment that described expection link bandwidth is each bar link in the microwave network calculates according to the modulating mode and the significant character rate of expection.

8. Dynamic Bandwidth Allocation control appliance according to claim 6 is characterized in that, described acquiring unit comprises:

Obtain subelement, be used for obtaining the modulating mode and the significant character rate of each bar link expection of microwave network;

Computation subunit is used for according to the significant character rate and the modulating mode that obtains the expection that subelement gets access to calculates the expection link bandwidth of each bar link;

Receive subelement, be used for receiving the current bandwidth request that the sending ending equipment of each bar link of microwave network sends.

9. Dynamic Bandwidth Allocation control appliance according to claim 8 is characterized in that, the described subelement that obtains comprises:

Obtain the sub level unit, be used for obtaining the link quality information that the receiving device of each bar link of microwave network reports;

10. a microwave system is characterized in that, comprising:

Dynamic Bandwidth Allocation DBA control appliance, be used for obtaining the expection link bandwidth and the current bandwidth request of each bar link of microwave network, carry out allocated bandwidth calculating according to expection link bandwidth and current bandwidth request, obtain bandwidth map, this bandwidth map is sent to sending ending equipment and receiving device, so that carry out allocated bandwidth;

11. microwave system according to claim 10 is characterized in that, also comprises:

Receiving device, be used to monitor the performance parameter that receives microwave signal, these performance parameters are sent to sending ending equipment or DBA control appliance, the modulating mode that receiving end/sending end equipment or DBA control appliance return, and receive the bandwidth map that the DBA control appliance sends.