CN104427601A - Method and device for adjusting channel power in two-channel indoor distribution system - Google Patents
Method and device for adjusting channel power in two-channel indoor distribution system Download PDFInfo
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- CN104427601A CN104427601A CN201310382802.9A CN201310382802A CN104427601A CN 104427601 A CN104427601 A CN 104427601A CN 201310382802 A CN201310382802 A CN 201310382802A CN 104427601 A CN104427601 A CN 104427601A
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- signal power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
Abstract
The invention provides a method and a device for adjusting channel power in a two-channel indoor distribution system. The method comprises: detecting user channel quality in real time; when the user channel quality is lower than a preset threshold value and a user is in a double-current transmission mode, detecting uplink signal power received by two channels on an RRU; and when the difference value of the uplink signal power of the two channels on the RRU is larger than a preset second threshold value, increasing the downlink transmitting power of the channel whose uplink signal power is low in the two channels. Using the method and the device, the downlink transmitting power of the channel whose uplink signal power is low can be automatically adjusted according to practical application conditions, thereby effectively improving throughput capacity of users.
Description
Technical field
The application relates to mobile communication technology field, particularly relates to a kind of channel power method and apparatus adjusted in the subsystem of binary channels room.
Background technology
In order to improve the mobile communication environment of indoor user group in building, in prior art, propose a kind of indoor distributed system, referred to as room subsystem.In this room subsystem, by utilizing the domestic aerial compartment system pre-set, the signal of mobile base station is evenly distributed on indoor every nook and cranny, thus ensure that room area has desirable quorum sensing inhibitor, improve the speech quality in building, improve call completion of mobile telephone rate, expand network capacity, improve the service level of mobile network on the whole.
Room of the prior art subsystem generally can adopt single pass mode or twin-channel mode.Fig. 1 is the structural representation of binary channels room of the prior art subsystem.As shown in Figure 1, binary channels room of the prior art subsystem is generally by indoor baseband processing unit (Building Baseband Unit, BBU), the parts such as Remote Radio Unit (Radio RemoteUnit, RRU), feeder line, mixer, coupler, power splitter and ceiling mount antenna composition.Wherein, the physical entity that base station and transmitting antenna couple together be can be described as passage.As shown in Figure 1, a passage can comprise the parts such as feeder line, mixer, power splitter, coupler usually.In the binary channels room subsystem shown in Fig. 1, because each antenna point is connected to two passages, 22 can be realized and receive, thus make above-mentioned binary channels room subsystem can support multiple-input and multiple-output (MIMO) technology, effectively promote user throughput.
But, when using above-mentioned binary channels room subsystem to carry out the indoor coverage of signal of Long Term Evolution (LTE) system, particularly in the scene of the newly-built road transformation in a road, there is larger difference in the length of cable, passive device quantity and the degree of aging that experience due to the signal transmitted in two paths, therefore the problem of channel power imbalance (namely the transmitting power of two passages is different) is easily there is at antenna opening place, as shown in Figure 2, thus unfavorable movie star is caused to the receptivity of terminal, cause the decline of user throughput.
In order to address this problem, current solution can only be all generally carry out unbalanced power detection when carrying out an acceptance inspection to room subsystem, to determine whether to occur the unbalanced problem of channel power.But after examination completes, but lack other effective monitoring method, can only by manually carrying out regular sample testing, therefore operating efficiency is low, needs the manpower and materials of at substantial.And when detecting in the subsystem of binary channels room the unbalanced problem of emergent power, traditional Adjusted Option sets up an attenuator on the passage that antenna opening power is higher, by making the power of two passages identical to attenuator adjustment.But in actual application environment, can be found by relevant test, within the scope of different, the power reducing higher a-road-through road will cause overall signal quality to be deteriorated, and can not promote the throughput of user.
Summary of the invention
In view of this, the invention provides a kind of channel power method and apparatus adjusted in the subsystem of binary channels room, thus can according to practical situations, the down transmitting power of the passage that adjustment upward signal power is low, promotes the throughput of user effectively automatically.
Technical scheme of the present invention is specifically achieved in that
Adjust a method for the channel power in the subsystem of binary channels room, the method comprises:
The channel quality of real-time detection user;
When the channel quality of described user lower than the first threshold value preset and described user is in stream transmission pattern time, detect the upward signal power that RRU upper two channel reception arrive;
When difference between the upward signal power of upper two passages of described RRU is greater than the second default threshold value, improve the down transmitting power of the low passage of upward signal power in described two passages.
Preferably, the channel quality of described real-time detection user comprises:
The Reference Signal Received Power RSRP of reporting of user is detected.
Preferably, the described RSRP to reporting of user carries out detection and comprises:
Calculate the mean value of the RSRP of reporting of user within the time period of preset length, using the mean value of described RSRP as testing result.
Preferably, the span of described first threshold value is :-80 ~-100dBm.
Preferably, the span of described second threshold value is: 5 ~ 8dB.
Preferably, before the down transmitting power of the passage that the upward signal power in described two passages of described raising is low, the method also comprises further:
Calculate the mean value of the difference between on described RRU, two channel reception arrive within the time period of preset length upward signal power, using the mean value of described difference as described two passages upward signal power between difference.
Preferably, the length of the time period of described preset length is: 15 seconds, 30 seconds or 60 seconds.
Preferably, the down transmitting power of the passage that the upward signal power in described two passages of described raising is low comprises:
The down transmitting power of passage low for the upward signal power in two passages is promoted N dB;
Wherein, the value of described N is n times of the difference between the upward signal power of described two passages.
Preferably, the span of described n is: 0.8 ~ 1.2.
Present invention also offers a kind of device of the channel power adjusted in the subsystem of binary channels room, the method comprises: detection module and adjusting module;
Described detection module, for detecting the channel quality of user in real time; When the channel quality of described user lower than the first threshold value preset and described user is in stream transmission pattern time, detect the upward signal power that RRU upper two channel reception arrive; When difference between the upward signal power of upper two passages of described RRU is greater than the second default threshold value, send adjustment instruction to described adjusting module;
Described adjusting module, the down transmitting power of the passage that the upward signal power for improving in described two passages according to adjustment instruction is low.
As seen from the above technical solution, due to the channel quality of user can be detected in real time in the present invention, and when user channel quality lower than preset the first threshold value and described user be in stream transmission pattern time, detect the upward signal power that upper two channel reception of RRU arrive, and then the difference between the upward signal power of upper two passages of described RRU is when being greater than the second default threshold value, improve the down transmitting power of the low passage of upward signal power in described two passages, thus can according to practical situations, the down transmitting power of the passage that automatic adjustment upward signal power is low, thus overall signal quality is promoted, effectively promote the throughput of user, but also the huge workload and cost manually spot-check and bring can be significantly reduced.
Accompanying drawing explanation
Fig. 1 is the structural representation of binary channels room of the prior art subsystem.
Fig. 2 is the unbalanced schematic diagram of channel power in the subsystem of binary channels room of the prior art.
Fig. 3 is the schematic flow sheet of the channel power method in the adjustment binary channels room subsystem in the embodiment of the present invention.
Fig. 4 is the structural representation of the device of channel power in the adjustment binary channels room subsystem in the embodiment of the present invention.
Embodiment
For making technical scheme of the present invention and advantage clearly understand, below in conjunction with drawings and the specific embodiments, the present invention is further detailed explanation.
Fig. 3 is the flow chart of the channel power method in the adjustment binary channels room subsystem in the embodiment of the present invention.
As shown in Figure 3, the channel power method in the adjustment binary channels room subsystem in the embodiment of the present invention comprises step as described below:
Step 301, detects the channel quality of user in real time.
In this step, need to detect in real time the channel quality of user.
Preferably, in a particular embodiment of the present invention, the channel quality of described real-time detection user can be:
The Reference Signal Received Power (Reference Signal Receiving Power, RSRP) of reporting of user is detected.
Because RSRP is LTE downlink reference signal received power, be mainly used in gauge signal intensity, the channel quality of user can be reflected.Therefore, by detecting the RSRP of reporting of user, the channel quality of user can be detected.
Further, in order to reduce the impact of subscriber signal fluctuation on the channel quality of user, in a preferred embodiment of the present invention, the described RSRP to reporting of user carries out detection and can be:
Calculate the mean value of the RSRP of reporting of user within the time period of preset length, using the mean value of described RSRP as testing result.
Preferably, in a particular embodiment of the present invention, the length of described time period can carry out arranging or adjusting according to practical situations in advance.Such as, the length of the time period of described preset length can be: 15 seconds, 30 seconds or 60 seconds etc.
Step 302, when the channel quality of described user lower than the first threshold value preset and described user is in stream transmission pattern time, detect the upward signal power that RRU upper two channel reception arrive.
After in step 301 real-time detection having been carried out to the channel quality of user, the quality of the channel quality of user can be judged according to testing result.Therefore, in this step, first can judge that whether the channel quality of described user is lower than the first threshold value D preset
rSRP.If the channel quality of described user lower than the first threshold value preset, then represents that the channel quality of this user is poor.
In a particular embodiment of the present invention, described first threshold value D
rSRPvalue can carry out in advance arranging or adjusting according to practical situations.Experimentally and practical experience known, RSRP is greater than to the user of-75dBm, the suitable reduction of its transmitting power can't affect the throughput to user.Therefore, in a preferred embodiment of the present invention, described first threshold value D
rSRPspan can be :-80 ~-100dBm; That is, described first threshold value D
rSRPvalue can be any one value in-80 ~-100dBm.
In addition, in this step, while judging the channel quality of user, also need to judge whether user is in stream transmission pattern (i.e. a kind of mode of operation of user's data flow of using dual-channel transmission different).If user is not in stream transmission pattern (such as, when user is in single-stream transmission pattern), then without the need to carrying out follow-up operation yet.
As from the foregoing, in this step, only have channel quality as described user lower than the first threshold value preset and described user is in stream transmission pattern time, the just upward signal power that arrives of detection RRU upper two channel reception, so that carry out follow-up operation.
Step 303, when the difference between the upward signal power of upper two passages of described RRU is greater than the second default threshold value, improves the down transmitting power of the low passage of upward signal power in described two passages.
In this step, the difference between the upward signal power needing first to judge that upper two channel reception of described RRU arrive | P
ch1-P
ch2| whether be greater than the second default threshold value D
uplink, only have when upper two channel reception of described RRU to upward signal power between difference be greater than default D
uplinktime, just improve the down transmitting power of the low passage of upward signal power in described two passages.Wherein, described P
ch1be the upward signal power of first passage, described P
ch2be the upward signal power of first passage.
In a particular embodiment of the present invention, described second threshold value D
uplinkvalue can carry out in advance arranging or adjusting according to practical situations.Such as, in a preferred embodiment of the present invention, described second threshold value D
uplinkspan can be: 5 ~ 8dB; That is, described second threshold value D
uplinkvalue can be any one value in 5 ~ 8dB.
Further, in order to reduce the movement of user to the impact of the signal fluctuation of user, in a preferred embodiment of the present invention, before this step, can further include:
Calculate the mean value of the difference between on described RRU, two channel reception arrive within the time period of preset length upward signal power, using the mean value of described difference as described two passages upward signal power between difference.
Preferably, in a particular embodiment of the present invention, the length of described time period can carry out arranging or adjusting according to practical situations in advance.Such as, the length of the time period of described preset length can be: 15 seconds, 30 seconds or 60 seconds etc.
In addition, in the inventive solutions, multiple method can be used improve the down transmitting power of the passage that the upward signal power in two passages is low.Such as, in a preferred embodiment of the present invention, the down transmitting power of the passage that the upward signal power in described two passages of described raising is low can be:
The down transmitting power of passage low for the upward signal power in two passages is promoted N dB; Wherein, the value of described N is n times of the difference between the upward signal power of described two passages.
Preferably, in a particular embodiment of the present invention, the span of described n can be: 0.8 ~ 1.2.Such as, described n can equal 1, now, and N=|P
ch1-P
ch2|.
According to said method provided by the invention, present invention also offers the device of the channel power in the subsystem of corresponding adjustment binary channels room, specifically refer to Fig. 4.
Fig. 4 is the structural representation of the device of channel power in the adjustment binary channels room subsystem in the embodiment of the present invention.
As shown in Figure 4, this device comprises: detection module 401 and adjusting module 402.
Described detection module 401, for detecting the channel quality of user in real time; When the channel quality of described user lower than the first threshold value preset and described user is in stream transmission pattern time, detect the upward signal power that RRU upper two channel reception arrive; When difference between the upward signal power of upper two passages of described RRU is greater than the second default threshold value, send adjustment instruction to described adjusting module 402;
Described adjusting module 402, the down transmitting power of the passage that the upward signal power for improving in described two passages according to adjustment instruction is low.
In sum, in the inventive solutions, due to the channel quality of user can be detected in real time, and when user channel quality lower than preset the first threshold value and described user be in stream transmission pattern time, detect the upward signal power that upper two channel reception of RRU arrive, and then the difference between the upward signal power of upper two passages of described RRU is when being greater than the second default threshold value, improve the down transmitting power of the low passage of upward signal power in described two passages, thus can according to practical situations, the down transmitting power of the passage that automatic adjustment upward signal power is low, thus overall signal quality is promoted, effectively promote the throughput of user, but also the huge workload and cost manually spot-check and bring can be significantly reduced.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. adjust a method for the channel power in the subsystem of binary channels room, it is characterized in that, the method comprises:
The channel quality of real-time detection user;
When the channel quality of described user lower than the first threshold value preset and described user is in stream transmission pattern time, detect the upward signal power that RRU upper two channel reception arrive;
When difference between the upward signal power of upper two passages of described RRU is greater than the second default threshold value, improve the down transmitting power of the low passage of upward signal power in described two passages.
2. method according to claim 1, is characterized in that, the channel quality of described real-time detection user comprises:
The Reference Signal Received Power RSRP of reporting of user is detected.
3. method according to claim 2, is characterized in that, the described RSRP to reporting of user carries out detection and comprises:
Calculate the mean value of the RSRP of reporting of user within the time period of preset length, using the mean value of described RSRP as testing result.
4. method according to claim 1, is characterized in that,
The span of described first threshold value is :-80 ~-100dBm.
5. method according to claim 1, is characterized in that,
The span of described second threshold value is: 5 ~ 8dB.
6. method according to claim 1, is characterized in that, before the down transmitting power of the passage that the upward signal power in described two passages of described raising is low, the method also comprises further:
Calculate the mean value of the difference between on described RRU, two channel reception arrive within the time period of preset length upward signal power, using the mean value of described difference as described two passages upward signal power between difference.
7. the method according to claim 3 or 6, is characterized in that:
The length of the time period of described preset length is: 15 seconds, 30 seconds or 60 seconds.
8. method according to claim 6, is characterized in that, the down transmitting power of the passage that the upward signal power in described two passages of described raising is low comprises:
The down transmitting power of passage low for the upward signal power in two passages is promoted N dB;
Wherein, the value of described N is n times of the difference between the upward signal power of described two passages.
9. method according to claim 8, is characterized in that,
The span of described n is: 0.8 ~ 1.2.
10. adjust a device for the channel power in the subsystem of binary channels room, it is characterized in that, the method comprises: detection module and adjusting module;
Described detection module, for detecting the channel quality of user in real time; When the channel quality of described user lower than the first threshold value preset and described user is in stream transmission pattern time, detect the upward signal power that RRU upper two channel reception arrive; When difference between the upward signal power of upper two passages of described RRU is greater than the second default threshold value, send adjustment instruction to described adjusting module;
Described adjusting module, the down transmitting power of the passage that the upward signal power for improving in described two passages according to adjustment instruction is low.
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