CN103796290B - A kind of chainlink control method and device - Google Patents
A kind of chainlink control method and device Download PDFInfo
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- CN103796290B CN103796290B CN201210420652.1A CN201210420652A CN103796290B CN 103796290 B CN103796290 B CN 103796290B CN 201210420652 A CN201210420652 A CN 201210420652A CN 103796290 B CN103796290 B CN 103796290B
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Abstract
The present invention provides a kind of chainlink control method and device, is related to wireless domain.Wherein, method includes：Obtain the first link-quality；New modulation system to be used is determined according to first link-quality；Obtain current transmission power；If the current transmission power can make microwave transport equipment normal work under the new modulation system, it is determined that the new modulation system is current modulation mode；Otherwise, former modulation system is kept to be current modulation mode.Present invention, avoiding as the effect of AM and ATPC is uncoordinated, non-linear distortion occurs under high-order modulating；Ensure that low-order-modulated mode plays bigger transmission power simultaneously.
Description
Technical field
The present invention relates to wireless communication field, particularly a kind of chainlink control method and device.
Background technology
With the development of communication technology, digital multimedia services of the business from simple little bandwidth speech business to big bandwidth
Evolution, supports adaptive modulation system（Automatic Modulation, AM）The demand of microwave transport equipment also increasingly increase
Greatly.
This kind of microwave transport equipment is when weather condition is preferable（When such as becoming a fine day）, need to support high order modulation
Mode（Such as 256QAM, quadrature amplitude modulation mode）To obtain bigger bandwidth；But when weather condition is poor（Such as the moon
When it rains）, in the case of high-order modulating is untenable, need using low-order-modulated mode（Such as QPSK, orthorhombic phase
Move keying modulation mode）To maintain the normal transmission of important service；
But as radio-frequency power amplifier has non-linear distortion, when power is bigger, distortion is bigger, is setting
When putting the transmission power of radio frequency, the situation for needing reserved enough rollback power to reduce emergent power distortion occurs, by
The peak-to-average force ratio under low-order-modulated mode is higher than in the peak-to-average force ratio under high-order modulating, this is required in high-order modulating
When need bigger rollback power, this results in maximum transmission power under high-order modulating less than under low-order-modulated mode
Maximum transmission power.
In traditional microwave transmission equipment, in the case where adaptive modulation system is opened, the maximum transmission power of radio frequency
May be only configured to the transmission power of most high-order modulating.So in the case where adaptive modulation system is switched to low order, no
The over-all properties of power amplifier can be played to greatest extent, the waste of power amplification efficiency is caused, and reduce anti fading ability.
Microwave transport equipment also supports automatic transmission power control simultaneously（Automatic Transmit
PowerControl, ATPC）Technology, ATPC technologies arrange desired receiving power scope, when actual receiving power is less than the phase
When the receiving power scope of prestige, emitting side increase transmission power, when actual receiving power is higher than desired receiving power model
When enclosing, emitting side reduces transmission power.
In the case where AM and ATPC is opened simultaneously, often due to the restriction of AM, ATPC cannot under low-order-modulated mode
Bigger transmission power is played, or due to due to ATPC, AM generates non-thread when adjusting to high-order modulating
Property distortion, causes the wireless link cannot normal work.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of chainlink control method and device, is opened in AM and ATPC simultaneously
In the case of, can guarantee that low-order-modulated mode plays bigger transmission power, and high-order modulating does not produce the non-of power
Linear distortion.
To solve above-mentioned technical problem, a kind of chainlink control method of offer of the present invention comprises the steps：
Obtain the first link-quality；New modulation system to be used is determined according to first link-quality；Obtain and work as
Front transmission power；If the current transmission power can make microwave transport equipment normal work under the new modulation system,
Then determine that the new modulation system is current modulation mode；Otherwise, former modulation system is kept to be current modulation mode.
Wherein, the step of determining new modulation system to be used according to first link-quality includes：If described
Entrance threshold value of one link-quality higher than high-order modulating, then select high-order modulating to be new modulation system；If institute
Modulation system is corresponding exits threshold value less than former to state the first link-quality, then select low-order-modulated mode to be new modulation methods
Formula.
Wherein, the method also includes：According to the link-quality under the current modulation mode, under adjustment current modulation mode
Transmission power.
Wherein, according to the link-quality under current modulation mode, adjust current modulation mode under transmission power the step of
Can also include：If the second link-quality under the current modulation mode is higher than an expected value, current modulation methods are reduced
Transmission power under formula, if second link-quality is less than the expected value, improves the transmitting under current modulation mode
Power.
Wherein, the adjustment upper limit of the transmission power under the current modulation mode is：Under the current modulation mode most
Big transmission power.
Wherein, if the current modulation mode is higher than the high-order modulating of former modulation system, still further comprise：
Whether the power loss that modulation system is brought after rising rank can maintain the channel quality needed for high order modulation, if it is satisfied, lowering
The maximum transmission power of transmission power to high-order；Otherwise, refuse modulation system change request, keep original modulation system constant.
Wherein, whether the power loss brought after modulation system rises rank can maintain the channel matter needed for high order modulation
Amount, if it is satisfied, lowering the maximum transmission power of transmission power to high-order；Otherwise, refuse modulation system change request, keep former
The step for having modulation system constant includes：If current ink quality-（Maximum under current transmission power-high-order modulating
Transmission power）Link-quality needed under ＞ high-order modulatings, then assert that the transmission power after the downward can guarantee that channel
Quality, it is allowed to keep current high-order modulating to be current modulation mode；If current ink quality-（Current transmission power-height
Maximum transmission power under rank modulation system）Link-quality needed for ＜ high-orders, then assert the transmission power after the downward not
Channel quality is can guarantee that, refusal modulation system change request keeps original modulation system constant.
Wherein, the high-order modulating is quadrature amplitude modulation mode, and the low-order-modulated mode is quadrature phase shift key
Control modulation system.
According to a further aspect in the invention, a kind of link data unit is also provided, including：
First acquisition unit, for obtaining the first link-quality；Modulation system select unit, for according to first chain
Road quality determines new modulation system to be used；Second acquisition unit, for obtaining current transmission power；Modulation system judges
Unit, if microwave transport equipment normal work can be made under the new modulation system for the current transmission power,
Determine that the new modulation system is current modulation mode；Otherwise, former modulation system is kept to be current modulation mode.
Wherein, the modulation system select unit specifically for：If first link-quality is higher than high-order modulating
Entrance threshold value, then select high-order modulating be new modulation system；If first link-quality is less than former modulation methods
Formula is corresponding to exit threshold value, then select low-order-modulated mode to be new modulation system.
Wherein, this device also includes：Transmission power adjustment unit, for according to the link matter under the current modulation mode
Amount, adjusts the transmission power under current modulation mode.
Wherein, the transmission power adjustment unit specifically for：If the second link matter under the current modulation mode
Amount then reduces the transmission power under current modulation mode higher than an expected value, if second link-quality is less than the phase
Prestige value, then improve the transmission power under current modulation mode.
Wherein, the adjustment upper limit of the transmission power under the current modulation mode is：Under the current modulation mode most
Big transmission power.
Wherein, transmission power adjustment unit is further used for：Whether the power loss brought after modulation system rises rank
The channel quality needed for high order modulation can be maintained, if it is satisfied, lowering the maximum transmission power of transmission power to high-order；It is no
Then, refuse modulation system change request, keep original modulation system constant.
Wherein, the transmission power adjustment unit specifically for:If current ink quality-（Current transmission power-high-order
Maximum transmission power under modulation system）Link-quality needed under ＞ high-order modulatings, then assert sending out after the downward
Penetrate power and can guarantee that channel quality, it is allowed to keep current high-order modulating to be current modulation mode；If current ink quality-
（Maximum transmission power under current transmission power-high-order modulating）Link-quality needed for ＜ high-orders, then assert it is described under
Transmission power after tune is it cannot be guaranteed that channel quality, refusal modulation system change request, keep original modulation system constant.
Present invention, avoiding as the effect of AM and ATPC is uncoordinated, non-linear distortion occurs under high-order modulating；
Ensure that low-order-modulated mode plays bigger transmission power simultaneously.
Description of the drawings
Fig. 1 is the schematic diagram of method in the present invention；
Fig. 2-Fig. 4 is the detail flowchart of the method that the embodiment of the present invention 1 is provided；
Fig. 5 is the structural representation of the device that the embodiment of the present invention 2 is provided；
Specific embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
Embodiment 1
As shown in figure 1, a kind of chainlink control method, comprises the steps：
Step 1, obtains the first link-quality；
Step 2, determines new modulation system to be used according to first link-quality；
Step 3, obtains current transmission power；
Step 4, if the current transmission power can make microwave transport equipment normal work in the new modulation system
Under, it is determined that the new modulation system is current modulation mode；Otherwise, former modulation system is kept to be current modulation mode.
Wherein, step 2 includes：If first link-quality is selected higher than the entrance threshold value of high-order modulating
High-order modulating is new modulation system；If modulation system is corresponding exits threshold value less than former for first link-quality,
Low-order-modulated mode is then selected to be new modulation system.
In another embodiment of the invention, on the basis of including above-mentioned steps 1-4, the method also includes：
Step 5, according to the link-quality under the current modulation mode, adjusts the transmission power under current modulation mode.
Wherein, according to the link-quality under current modulation mode, adjust current modulation mode under transmission power the step of
Can also include：If the second link-quality under the current modulation mode is higher than an expected value, current modulation methods are reduced
Transmission power under formula, it is ensured that the mode that high-order is adjusted to leaves enough power assurance rollbacks.If second link-quality is less than
The expected value, then improve current modulation mode under transmission power, it is ensured that during low-order-modulated can peak power be transmitted.
Wherein, the adjustment upper limit of the transmission power under the current modulation mode is：Under the current modulation mode most
Big transmission power.The peak power is the maximum transmission power that normal work is capable of in microwave transmission.
Wherein, if the current modulation mode is higher than the high-order modulating of former modulation system, still further comprise：
Whether the power loss that modulation system is brought after rising rank can maintain the channel quality needed for high order modulation, if it is satisfied, lowering
The maximum transmission power of transmission power to high-order；Otherwise, refuse modulation system change request, keep original modulation system constant.
Wherein, whether the power loss brought after modulation system rises rank can maintain the channel matter needed for high order modulation
Amount, if it is satisfied, lowering the maximum transmission power of transmission power to high-order；Otherwise, refuse modulation system change request, keep former
The step for having modulation system constant includes：If current ink quality-（Maximum under current transmission power-high-order modulating
Transmission power）Link-quality needed under ＞ high-order modulatings, then assert that the transmission power after the downward can guarantee that channel
Quality, it is allowed to keep current high-order modulating to be current modulation mode；If current ink quality-（Current transmission power-height
Maximum transmission power under rank modulation system）Link-quality needed for ＜ high-orders, then assert the transmission power after the downward not
Channel quality is can guarantee that, refusal modulation system change request keeps original modulation system constant.
Wherein, the high-order modulating is quadrature amplitude modulation mode, and the low-order-modulated mode is quadrature phase shift key
Control modulation system.
As shown in Fig. 2 being specifically described to top method below：
S101：Obtain current first link-quality；
S102：According to the first link-quality selecting modulation mode, if link-quality is good, high-order modulating is selected（Such as
256QAM）If link-quality is poor, low-order-modulated mode is selected（Such as QPSK）；
Specifically, if first link-quality selects high contrast higher than the entrance threshold value of high-order modulating
Mode processed is new modulation system；If modulation system is corresponding exits threshold value less than former for first link-quality, select
Low-order-modulated mode is new modulation system；For each rank modulation system, there is one into thresholding and exit thresholding, work as letter
When road quality is more than the entrance thresholding of higher order, then illustrate that current ink modulation may operate in high-order modulating, then
A liter rank operation requests are carried out, if less than when exiting thresholding, link-quality illustrates that link-quality can not maintain current rank,
Depression of order operation requests are carried out then；
S103：Request is changed according to modulation system carries out power judgement, currently launch with being determined according to power decision algorithm
Power whether can with normal work under new modulation system, if can if carry out step S105, otherwise, carry out step S104,
Power decision algorithm is will be described in detail herein below；
S104：After power judgement fails, new modulation system does not come into force, and maintains original modulation system constant；
S105：After power adjudicates success, new modulation system is set；
S106：According to link-quality and current modulation mode, transmission power is determined, if link condition improves, reduce
Transmission power, if link-quality is deteriorated, improves transmission power, and the upper limit of transmission power is the maximum under current modulation mode
Transmission power, to guarantee to give full play to power amplification efficiency and ensure undistorted；
Specifically, if the second link-quality under the current modulation mode is higher than an expected value, reduce current
Transmission power under modulation system, it is ensured that the mode that high-order is adjusted to leaves enough power assurance rollbacks.If the second link matter
Amount improves the transmission power under current modulation mode less than the expected value, then, it is ensured that during low-order-modulated can peak power enter
Row transmission.
Whether the power loss brought after modulation system rises rank can maintain the channel quality needed for high order modulation, if
Meet, lower the maximum transmission power of transmission power to high-order；Otherwise, refuse modulation system change request, keep original modulation
Mode is constant；
Wherein, desired link-quality can be user configured, it is also possible to be determined according to the entrance thresholding of higher order,
When the entrance thresholding using higher order determines, the function of ATPC will adjust transmission power as far as possible and rise rank to reach AM
Condition.
The determination methods that modulation system changes request are further described with reference to two kinds of forms of expression：
<The form of expression 1>
As shown in Figure 3：
S201：Receive modulation system change request message;
S202：Judge whether the liter rank operation for being modulation system, if execution step S203, otherwise execution step
S204;
S203：Whether current transmission power is judged less than the maximum transmission power under modulation system in change request, if
Step S204 is carried out, if not execution step S205；
Specifically, if current transmission power has exceeded the maximum transmit power of high-order, necessarily cause work(after liter rank
The non-linear distortion of rate, causes link-quality to be deteriorated, if lower adjusting power is to the maximum transmission power of high rank, it is also possible to link matter
Amount causes to reach the requirement needed for high-order due to power drop, so as to produce error code；
S204：Agree to modulation system change request, the modulation system that comes into force change；
S205：Refusal modulation system change request, keeps original modulation system；
<The form of expression 2>
When link-quality is good, during higher than default minimum threshold, if selecting high-order modulating, bigger returning is needed
Move back undistorted in power assurance transmitting procedure, so, it is excessive that possible current power takes general power, remaining rollback power
Transmission quality is not sufficient to ensure that, in order to solve the above problems, present invention also offers another scheme, the program can be in chain
When road quality is higher than minimum threshold, current power is reduced to into the peak power of high-order modulating, realizes and ensureing transmission
Under the premise of quality, as far as possible with high power transmission.Idiographic flow is as shown in Figure 4：
S301：Receive modulation system change request message；
S302：Judge whether the liter rank operation for being modulation system, if execution step S303, otherwise execution step
S304；
S303：Whether current transmission power is judged less than the maximum transmission power under modulation system in change request, if
Step S304 is carried out, if not execution step S305；
S304：Agree to modulation system change request, the modulation system that comes into force change；
S305：Whether the power loss that judgement is brought after rising rank still can maintain the channel quality needed for high order modulation,
If it is satisfied, then execution step S306, is unsatisfactory for then execution step S307；
Specifically, there can be following judgement formula：
If current ink quality-（Maximum transmission power under current transmission power-high-order modulating）The high contrasts of ＞
Link-quality needed under mode processed, then assert that the transmission power after the downward can guarantee that channel quality, it is allowed to keeps current
High-order modulating is current modulation mode；If current ink quality-（Under current transmission power-high-order modulating most
Big transmission power）Link-quality needed for ＜ high-orders, then assert the transmission power after the downward it cannot be guaranteed that channel quality, refuses
Modulation system change request absolutely, keeps original modulation system constant；Power loss of the algorithm after to liter rank is converted,
If the reduction of power brings the decline of signal to noise ratio still meet demand of the high-order to channel quality, allow to rise rank, this
Algorithm is a little to allow AM to reach high order modulation to greatest extent, increases the capacity of system；
S306：Lower the maximum transmission power of transmission power to high-order；
S307：Refusal modulation system change request, keeps original modulation system；
The method of the present invention judges the modulation system that link can be used by obtaining link quality information at any time, afterwards
Judge whether current transmission power can be under new modulation system, it is ensured that microwave transport equipment normal work, so as to solve
In the case that AM and ATPC is opened simultaneously, due to the restriction of AM, ATPC cannot play bigger transmitting under low-order-modulated mode
Power, or due to due to ATPC, AM generates non-linear distortion when adjusting to high-order modulating, causes wireless
Link cannot normal work the problems such as.According further to the link-quality under the current modulation mode, current modulation mode is adjusted
Under transmission power, it is ensured that low-order-modulated mode plays bigger transmission power.
Embodiment 2
Correspondingly, the present invention provides a kind of link data unit, as shown in figure 5, including：
First acquisition unit, for obtaining the first link-quality；
Modulation system select unit, for determining new modulation system to be used according to first link-quality；
Second acquisition unit, for obtaining current transmission power；
Modulation system identifying unit, if for judging that the current transmission power can make microwave transport equipment normal work
Under the new modulation system, it is determined that the new modulation system is current modulation mode；Otherwise, keep former modulation system
For current modulation mode.
Wherein, the modulation system select unit specifically for：If first link-quality is higher than high-order modulating
Entrance threshold value, then select high-order modulating be new modulation system；If first link-quality is less than former modulation methods
Formula is corresponding to exit threshold value, then select low-order-modulated mode to be new modulation system.
In addition, this device can also include：Transmission power adjustment unit, can be according to the link under the current modulation mode
Quality, adjusts the transmission power under current modulation mode.If the second link-quality under the current modulation mode is higher than one
Expected value, then reduce the transmission power under current modulation mode, if second link-quality is less than the expected value, carry
Transmission power under high current modulation mode.Wherein, the adjustment upper limit of the transmission power under the current modulation mode is：It is described
Maximum transmission power under current modulation mode.
Transmission power adjustment unit is further used for：Whether the power loss brought after modulation system rises rank can be tieed up
The channel quality needed for high order modulation is held, if it is satisfied, lowering the maximum transmission power of transmission power to high-order；Otherwise, refuse
Modulation system change request, keeps original modulation system constant.
Judge whether to maintain the method for the channel quality needed for high order modulation be：If current ink quality-（Currently
Maximum transmission power under transmission power-high-order modulating）Link-quality needed under ＞ high-order modulatings, then assert
Transmission power after the downward can guarantee that channel quality, it is allowed to keep current high-order modulating to be current modulation mode；If
Current ink quality-（Maximum transmission power under current transmission power-high-order modulating）Link matter needed for ＜ high-orders
Amount, then assert the transmission power after the downward it cannot be guaranteed that channel quality, refusal modulation system change request, keep original tune
Mode processed is constant.
In the case that the device of this programme is solved in AM and ATPC while opening, due to the restriction of AM, ATPC is in low order
Bigger transmission power cannot be played under modulation system, or due to due to ATPC, AM is being adjusted to high-order modulating
When generate non-linear distortion, cause wireless link cannot normal work the problems such as.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of without departing from principle of the present invention, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (13)
1. a kind of chainlink control method, it is characterised in that comprise the steps：
Obtain the first link-quality；
New modulation system to be used is determined according to first link-quality；
Obtain current transmission power；
If the current transmission power can make microwave transport equipment normal work under the new modulation system, it is determined that institute
New modulation system is stated for current modulation mode；Otherwise, former modulation system is kept to be current modulation mode；According to first chain
The step of road quality determines new modulation system to be used includes：
If first link-quality is higher than the entrance threshold value of high-order modulating, high-order modulating is selected to be new tune
Mode processed；
If first link-quality is corresponding less than former modulation system to exit threshold value, low-order-modulated mode is selected to be new
Modulation system.
2. chainlink control method according to claim 1, it is characterised in that also include：
According to the link-quality under the current modulation mode, the transmission power under current modulation mode is adjusted.
3. chainlink control method according to claim 2, it is characterised in that according to the link matter under current modulation mode
Amount, adjust current modulation mode under transmission power the step of include：
If the second link-quality under the current modulation mode is higher than an expected value, sending out under current modulation mode is reduced
Power is penetrated, if second link-quality is less than the expected value, the transmission power under current modulation mode is improved.
4. chainlink control method according to claim 3, it is characterised in that the transmission power under the current modulation mode
The adjustment upper limit be：Maximum transmission power under the current modulation mode.
5. chainlink control method according to claim 2, it is characterised in that if the current modulation mode is higher than former tune
The high-order modulating of mode processed, still further comprises：
Whether the power loss brought after modulation system rises rank can maintain the channel quality needed for high order modulation, if full
Foot, lowers the maximum transmission power of transmission power to high-order；Otherwise, refuse modulation system change request, keep original modulation methods
Formula is constant.
6. chainlink control method according to claim 5, it is characterised in that the power brought after modulation system rises rank is damaged
Whether mistake can maintain the channel quality needed for high order modulation, if it is satisfied, lowering the emission maximum work(of transmission power to high-order
Rate；Otherwise, refuse modulation system change request, the step for keeping original modulation system constant includes：
If current ink quality-(maximum transmission power under current transmission power-high-order modulating) ＞ high order modulation sides
Link-quality needed under formula, then assert that the transmission power after the downward can guarantee that channel quality, it is allowed to keep current high-order
Modulation system is current modulation mode；
If needed for current ink quality-(maximum transmission power under current transmission power-high-order modulating) ＜ high-orders
Link-quality, then assert the transmission power after the downward it cannot be guaranteed that channel quality, refusal modulation system change request, keep
Original modulation system is constant.
7. chainlink control method according to claim 1, it is characterised in that the high-order modulating is that quadrature amplitude is adjusted
Mode processed, the low-order-modulated mode are QPSK modulation system.
8. a kind of link data unit, it is characterised in that include：
First acquisition unit, for obtaining the first link-quality；
Modulation system select unit, for determining new modulation system to be used according to first link-quality；
Second acquisition unit, for obtaining current transmission power；
Modulation system identifying unit, if microwave transport equipment normal work can be made described new for the current transmission power
Modulation system under, it is determined that the new modulation system be current modulation mode；Otherwise, former modulation system is kept for current tune
Mode processed；The modulation system select unit specifically for：
If first link-quality is higher than the entrance threshold value of high-order modulating, high-order modulating is selected to be new tune
Mode processed；
If first link-quality is corresponding less than former modulation system to exit threshold value, low-order-modulated mode is selected to be new
Modulation system.
9. link data unit according to claim 8, it is characterised in that also include：
Transmission power adjustment unit, for according to the link-quality under the current modulation mode, adjusting under current modulation mode
Transmission power.
10. link data unit according to claim 9, it is characterised in that the transmission power adjustment unit is specifically used
In：
If the second link-quality under the current modulation mode is higher than an expected value, sending out under current modulation mode is reduced
Power is penetrated, if second link-quality is less than the expected value, the transmission power under current modulation mode is improved.
11. link data units according to claim 10, it is characterised in that the transmitting work(under the current modulation mode
The adjustment upper limit of rate is：Maximum transmission power under the current modulation mode.
12. link data units according to claim 9, it is characterised in that transmission power adjustment unit is also further used
In：
Whether the power loss brought after modulation system rises rank can maintain the channel quality needed for high order modulation, if full
Foot, lowers the maximum transmission power of transmission power to high-order；Otherwise, refuse modulation system change request, keep original modulation methods
Formula is constant.
13. link data units according to claim 12, it is characterised in that the transmission power adjustment unit is specifically used
In：
If current ink quality-(maximum transmission power under current transmission power-high-order modulating) ＞ high order modulation sides
Link-quality needed under formula, then assert that the transmission power after the downward can guarantee that channel quality, it is allowed to keep current high-order
Modulation system is current modulation mode；
If needed for current ink quality-(maximum transmission power under current transmission power-high-order modulating) ＜ high-orders
Link-quality, then assert the transmission power after the downward it cannot be guaranteed that channel quality, refusal modulation system change request, keep
Original modulation system is constant.
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| CN102036291A (en) * | 2009-09-28 | 2011-04-27 | 中兴通讯股份有限公司 | Method and device for processing channel quality report of backhaul link |
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| CN102036291A (en) * | 2009-09-28 | 2011-04-27 | 中兴通讯股份有限公司 | Method and device for processing channel quality report of backhaul link |
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