CN102761380A - Determining method of link loss value and radio remote unit (RRU) - Google Patents
Determining method of link loss value and radio remote unit (RRU) Download PDFInfo
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- CN102761380A CN102761380A CN2011101118153A CN201110111815A CN102761380A CN 102761380 A CN102761380 A CN 102761380A CN 2011101118153 A CN2011101118153 A CN 2011101118153A CN 201110111815 A CN201110111815 A CN 201110111815A CN 102761380 A CN102761380 A CN 102761380A
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Abstract
The invention discloses a determining method of a link loss value and a radio remote unit (RRU), which are used for solving the problem of more resource consumption during link loss value testing of a link loss value testing method provided by the prior art. The determining method comprises the following steps of: determining a first ratio port with a work mode set to be an emitting test mode and a second ratio port with a work mode set to be a receiving test mode by the RRU from ratio ports included in the RRU; generating a first signal by the RRU, and sending the first signal through the first ratio port; determining a second signal received by the second ratio port from a first communication link to be tested between the first ratio port and the second ratio port by the RRU; and determining a first loss value of the first communication link to be tested according to the first signal and the second signal.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of definite method and Remote Radio Unit of link loss value.
Background technology
Along with Long Term Evolution (LTE; Long Term Evolution) development of system; The LTE system will take twin-channel mode aspect the indoor covering gradually; Promptly be laid with two strip antennas a covering points, the signal that signal source is sent can transfer to this two strip antenna separately through two separate signal passages.The sketch map of the indoor coverage mode of a kind of binary channels is as shown in Figure 1.Wherein, The signal that one paths is transmitted by with indoor baseband processing unit (BBU; Building Base band Unit) continuous TD-S/TD-L bimodulus Remote Radio Unit (RRU; Radio Remote Unit) sends, and finally transfer to the single polarization ceiling mount antenna after handling through coupler, power splitter; The signal that another paths transmitted then be signal that the signal that sends of RRU and other signal sources are sent after mixer closes the road, obtain close the road signal, this closes the road signal and finally transfers to the single polarization ceiling mount antenna through coupler, power splitter after handling.
To the indoor coverage mode of binary channels as shown in Figure 1; Because the signal (like the signal in GSM and the TD-SCDMA system) that one of them passage transmitted is sent by signal demand that RRU sent and other signal sources closes the road; Therefore; The link loss value of two passages often there are differences, thereby has caused the imbalance of link.Because the link imbalance will have a negative impact to systematic function, therefore, need these two links be calibrated, it is identical or more similar that its link loss value is calibrated to.
The prerequisite that realization is accurately calibrated link is the accurate test to link loss value.In the prior art; For the test link loss value, generally take signal source to cooperate the mode of frequency spectrograph, link one end promptly to be measured connects signal source; The other end connects frequency spectrograph, thereby utilizes frequency spectrograph to realize the loss value of one section link between signal source and the frequency spectrograph is tested.The defective that such testing scheme exists is, on the one hand, introduce special frequency spectrograph and test, and expends more resource; On the other hand; When link being carried out loss value when test, not only to consider the loss value (being the link loss value of above-mentioned antenna during) of down link as reception antenna, also to consider the loss value (being the link loss value of above-mentioned antenna during) of up link) as transmitting antenna; Therefore; To above-mentioned two links, in fact frequency spectrograph has 4 kinds of connected modes when respectively the loss value of its uplink and downlink link being tested; And, need that 4 kinds of different connected modes also can compare consumes resources between the completion equipment in order to accomplish the test of link loss value.
Summary of the invention
The embodiment of the invention provides a kind of definite method and Remote Radio Unit of link loss value, and the link loss value method of testing of utilizing prior art to provide in order to solution is carried out the link loss value test and can be expended more problem of resource.
The embodiment of the invention adopts following technical scheme:
A kind of definite method of link loss value comprises:
Radio frequency remote unit RRU confirms that mode of operation is set to first prevention at radio-frequency port of transmission test pattern and second prevention at radio-frequency port that mode of operation is set to the acceptance test pattern from self-contained prevention at radio-frequency port; RRU generates first signal, and sends first signal through first prevention at radio-frequency port; And RRU detects the secondary signal that second prevention at radio-frequency port receives from first communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port; And, confirm first loss value of first communication link to be tested according to first signal and secondary signal.
Preferably, RRU also comprises after confirming said first loss value: the mode of operation of RRU first prevention at radio-frequency port is set to the acceptance test pattern, and the mode of operation of second prevention at radio-frequency port is set to the transmission test pattern; RRU generates first signal, and sends first signal through second prevention at radio-frequency port; And RRU detects the 3rd signal that first prevention at radio-frequency port receives from said first communication link to be tested; And, confirm second loss value of said first communication link to be tested according to first signal and the 3rd signal.
Preferably, this method also comprises: according to said first loss value and said second loss value, confirm the up-downgoing loss difference of said first communication link to be tested.
Preferably, RRU also comprises after confirming said first loss value: RRU generates first signal, and sends first signal through first prevention at radio-frequency port; And RRU detects the 4th signal that second prevention at radio-frequency port receives from second communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port; And, confirm the loss value of said second communication link to be tested according to first signal and the 4th signal.
Preferably, this method also comprises: according to the loss value of said first loss value and said second communication link to be tested, confirm loss value poor of loss value and second communication link to be tested of first communication link to be tested.
A kind of Remote Radio Unit comprises:
The prevention at radio-frequency port determination module is used for the prevention at radio-frequency port that comprises from said Remote Radio Unit, confirms that mode of operation is set to first prevention at radio-frequency port of transmission test pattern and second prevention at radio-frequency port that mode of operation is set to the acceptance test pattern; Signal transmitting module is used to generate first signal, and first prevention at radio-frequency port of confirming through the prevention at radio-frequency port determination module sends first signal; Signal detection module is used to detect the secondary signal that the second definite prevention at radio-frequency port of prevention at radio-frequency port determination module receives from first communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port; The loss value determination module is used for first signal and the detected secondary signal of signal detection module according to the signal transmitting module transmission, confirms first loss value of first communication link to be tested.
The beneficial effect of the embodiment of the invention is following:
The scheme that the embodiment of the invention provides is through the setting to the RRU prevention at radio-frequency port; RRU is set to both can be used as signal source; Can be used as the testing apparatus that receives signal and carry out the loss value test again, test, saved and tested required resource thereby need not to introduce extra frequency spectrograph.
Description of drawings
Fig. 1 is the indoor coverage mode sketch map of binary channels;
The idiographic flow sketch map of definite method of a kind of link loss value that Fig. 2 provides for the embodiment of the invention;
Fig. 3 is the sketch map of two links in the indoor coverage mode of binary channels;
Fig. 4 a is the constructed calibration topological structure sketch map of calibration to link 1;
Fig. 4 b is the constructed calibration topological structure sketch map of calibration to link 2;
Fig. 5 is the mode of operation sketch map of the prevention at radio-frequency port of RRU;
Fig. 6 confirms scheme for the link loss value that adopts the embodiment of the invention to provide and carries out a kind of concrete realization flow sketch map of link loss value test;
The concrete structure sketch map of definite device of a kind of link loss value that Fig. 7 provides for the embodiment of the invention.
Embodiment
Carry out the link loss value test and can expend more problem of resource in order to solve the link loss value method of testing of utilizing prior art to provide; The embodiment of the invention provides a kind of definite scheme of link loss value; This scheme is through the setting to the RRU prevention at radio-frequency port, and RRU is set to both can be used as signal source, can be used as the testing apparatus that receives signal and carry out the loss value test again; Test thereby need not to introduce extra frequency spectrograph, saved and tested required resource.
Below in conjunction with accompanying drawing, specify definite scheme that the embodiment of the invention provides link loss value.
The embodiment of the invention at first provides a kind of definite method of link loss value, and the idiographic flow sketch map of this method is as shown in Figure 2, may further comprise the steps:
Step 21, RRU confirms that mode of operation is set to first prevention at radio-frequency port of transmission test pattern and second prevention at radio-frequency port that mode of operation is set to the acceptance test pattern from self-contained prevention at radio-frequency port;
Step 22, RRU generates first signal, and sends first signal through first prevention at radio-frequency port;
Step 23, RRU detects the secondary signal that second prevention at radio-frequency port receives from first communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port;
Step 24 according to first signal and secondary signal, is confirmed first loss value of first communication link to be tested.
If will transmit first signal to second prevention at radio-frequency port through first prevention at radio-frequency port is regarded as " downlink transfer ", first loss value that then obtains through step 24 test is the descending loss value of first communication link to be tested.Correspondingly, if will on the basis that tests out above-mentioned first loss value, further test corresponding up loss value again, can realize through following step:
At first, the mode of operation of RRU first prevention at radio-frequency port is set to the acceptance test pattern, and the mode of operation of second prevention at radio-frequency port is set to the transmission test pattern;
Then, RRU generates first signal, and sends first signal through second prevention at radio-frequency port;
RRU detects the 3rd signal that first prevention at radio-frequency port receives from first communication link to be tested;
At last, RRU confirms second loss value of first communication link to be tested according to first signal and the 3rd signal.
Pass through above-mentioned steps; The mode of operation of first prevention at radio-frequency port is set to the acceptance test pattern; The mode of operation of second prevention at radio-frequency port is set to the transmission test pattern; Just can be implemented in first communication link to be tested signal flow in transmission and the flow process shown in Figure 1 easily to opposite signal, and need the annexation of communication link and RRU not made any change.
Preferably, after determining first loss value and second loss value,, just can determine the up-downgoing loss value of first communication link to be tested through calculating the poor of first loss value and second loss value.
In addition; The such scheme that provides based on the application embodiment; After first communication link to be tested is tested; When communication link to be tested becomes second communication link to be tested by first communication link to be tested, can also further carry out following step, to realize test to the loss value of second communication link to be tested:
At first, RRU generates first signal, and sends first signal through first prevention at radio-frequency port;
Then, RRU detects the 4th signal that second prevention at radio-frequency port receives from second communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port;
At last, RRU confirms second loss value of second communication link to be tested according to first signal and the 4th signal.
In embodiments of the present invention, behind second loss value of determining first loss value and second communication link to be tested, further second loss value of first loss value of definite first communication link to be tested of basis and second communication link to be tested is poor.Poor according to this loss value follow-uply just can be realized the calibration to link, is calibrated to the loss value of first communication link to be tested identical or close with the loss value of second communication link to be tested.
In addition; To second communication link to be tested; After first loss value of determining first communication link to be tested, can also send first signal by first prevention at radio-frequency port, and receive under the pattern of signal by second prevention at radio-frequency port; Detect the signal that second prevention at radio-frequency port receives from second communication link to be tested through above-mentioned similar step, thereby determine first loss value of second communication link to be tested.
Based on first, second loss value of second communication link to be tested, just can determine the up-downgoing loss difference of second communication link to be tested.
Need to prove that to first, second communication link to be tested, the embodiment of the invention does not limit the order that it carries out the uplink and downlink test.Such as; If send this sense that signal, second prevention at radio-frequency port receive signal as " up " direction with first prevention at radio-frequency port; And in the opposite direction as " descending " direction; After then can carrying out the uplink and downlink test to first communication link to be tested earlier, again second communication link to be tested is carried out the uplink and downlink test.After also can carrying out up test respectively, again first, second communication link to be tested is carried out descending test respectively to first, second communication link to be tested.Wherein, the embodiment of the invention is not done qualification to the sequencing of uplink and downlink test yet, such as, to same communication link to be tested, can carry out up test to it earlier, carry out descending test again; Vice versa.
Need to prove in the such scheme that the embodiment of the invention provides, in first, second communication link to be tested, can have only a link to comprise mixer and the source device that is different from above-mentioned RRU in addition.Such situation is particularly useful for the actual scene that the present invention introduces in background technology.
The such scheme that adopts the embodiment of the invention to provide; Can be when RRU be set to signal source; Also it is set to reception and loss value test that testing apparatus is realized signal, tests thereby need not to introduce extra frequency spectrograph, has saved and has tested required resource.In addition; When testing to the uplink and downlink signals transmission on the same link; Need not again annexation to be adjusted; And the mode of operation that only need reset the RRU prevention at radio-frequency port gets final product, therefore with prior art in the mode of testing to the uplink and downlink transmission course compare, this scheme that the embodiment of the invention provides can realize conveniently, simply the loss value of link tested.
Below with the embodiment of the invention application flow of such scheme in reality to be provided be example, specify the practical implementation process of this scheme.
In the practical application; To binary channels mode as shown in Figure 1, it to be analyzed and can know, the difference of two links mainly is created in information source end as shown in Figure 3; Article two, no matter the far-end of link (link 1 among Fig. 3 and link 2) still is all identical on the cable from device then; Therefore, when carrying out chain calibration, one section link that can only belong to the information source end calibrated and get final product.
When the link at link 1,2 information source ends place is calibrated, at first to make up corresponding calibration topological structure.
To the calibration of link 1, the calibration topological structure of structure is shown in Fig. 4 a.In Fig. 4 a, comprise the information source end in the link 1 but the end that do not comprise one section cable of far-end links to each other with the A prevention at radio-frequency port of RRU, the other end then links to each other with the B prevention at radio-frequency port of RRU.
In like manner, to the calibration of link 2, the calibration topological structure of structure is shown in Fig. 4 b.In Fig. 4 b, comprise the information source end in the link 2 but the end that do not comprise one section cable of far-end links to each other with the A prevention at radio-frequency port of RRU, the other end then links to each other with the B prevention at radio-frequency port of RRU.
Based on the calibration topological structure shown in Fig. 4 a, Fig. 4 b, further operation is need the mode of operation of the prevention at radio-frequency port of RRU be provided with.The mode of operation sketch map of the prevention at radio-frequency port of RRU is as shown in Figure 5.As can be seen from Figure 5; With A prevention at radio-frequency port and B prevention at radio-frequency port is example; It links to each other with the digital processing part (this digital processing partly can be considered the CPU of RRU) of RRU respectively, and respectively comprises three kinds of mode of operations, is respectively normal mode, transmission test pattern and acceptance test pattern.The normal mode of A prevention at radio-frequency port, transmission test pattern and acceptance test pattern can be controlled through switch a1, a2, a3 respectively; The normal mode of B prevention at radio-frequency port, transmission test pattern and acceptance test pattern then can be controlled through switch b1, b2, b3 respectively.In the embodiment of the invention, can control the state of above-mentioned each switch, thereby can realize sending signal to the B prevention at radio-frequency port, perhaps realize sending signal to the A prevention at radio-frequency port by the B prevention at radio-frequency port by the A prevention at radio-frequency port through the software that moves among the RRU.
Based on the calibration topological structure shown in Fig. 4 a, Fig. 4 b with to the above-mentioned set-up mode of radio frequency port working pattern, as shown in Figure 6 to a kind of concrete testing process sketch map of link loss value, comprise the steps:
Being provided with that RRU operates under the test pattern is the equal of to carry out the transmission test pattern of A prevention at radio-frequency port and the operation that the acceptance test pattern is set to the state that can be provided with;
Step 62; To link 1; Based on the calibration topological structure shown in Fig. 4 a; According to the flow direction of signal in the link 1 of expectation (signal flow of suppose expectation to for to flow to the B prevention at radio-frequency port, and will be the down direction of signal by the conduct that the A prevention at radio-frequency port sends to the direction transmission signal of B prevention at radio-frequency port), be that closure state makes the A prevention at radio-frequency port be operated under the transmission test pattern through a2 is set by signal by the A prevention at radio-frequency port; Through b3 is set is closure state, makes the B prevention at radio-frequency port be operated under the acceptance test pattern;
Step 63, RRU generates test signal, and sends through the A prevention at radio-frequency port, and wherein, this test signal of sending through the A prevention at radio-frequency port can be sent to the B prevention at radio-frequency port via link 1.
Step 64, RRU obtains the signal that receives through the B prevention at radio-frequency port, and the intensity level of the test signal of sending according to the A prevention at radio-frequency port and the intensity level of this signal that the B prevention at radio-frequency port receives, and confirms the descending loss value D of link 1
1-downlink
Need to prove the D that determines here
1-uplink-D
1-downlinkCan be used to judge the link of link 1 connects whether there is fault.Because in theory, when there is not fault in the link connection of link 1, D
1-uplinkShould equal D
1-downlink, perhaps the link of link 1 connects when not existing than major break down, D
1-uplinkWith D
1-downlinkShould be individual more similar.And work as D
1-uplink-D
1-downlinkWhen being a bigger value, probably be that link connects and breaks down, possibly have the problem of misconnection such as some equipment (like circulator) in the link 1.Therefore, according to D
1-uplink-D
1-downlink, can realize fault detect to link 1.
Step 610 according to the mode that is similar to above-mentioned steps 67～step 69, is confirmed the up loss value D of link 2
2-uplink
Step 611 is according to the D of the link of determining 2
2-downlinkAnd D
2-uplink, confirm the up-downgoing loss difference of link 2, i.e. D
2-uplink-D
2-downlink
Step 612 is according to the D that confirms
1-uplink, D
1-downlink, D
2-uplinkAnd D
2-downlink, confirm the descending loss value difference of link 1 and link 2, i.e. D
1-downlink-D
2-downlink, and the up loss value difference of definite link 1 and link 2, i.e. D
1-uplink-D
2-uplink
Step 613 is according to the D that confirms
1-downlink-D
2-downlinkAnd D
1-uplink-D
2-uplink, link 1 and/or link 2 are calibrated.Owing to according to the uplink and downlink loss value difference of link 1,2 link 1 and/or link 2 are calibrated and to be adopted mode commonly used in the prior art, so the embodiment of the invention is introduced this part content no longer in detail.
Correspondingly, the embodiment of the invention also provides a kind of RRU, and the concrete structure signal of this RRU is as shown in Figure 7, comprises the following function module:
Prevention at radio-frequency port determination module 71 is used for the prevention at radio-frequency port that comprises from said Remote Radio Unit, confirms that mode of operation is set to first prevention at radio-frequency port of transmission test pattern and second prevention at radio-frequency port that mode of operation is set to the acceptance test pattern;
Signal transmitting module 72 is used to generate first signal, and sends first signal through the prevention at radio-frequency port determination module true 71 first fixed prevention at radio-frequency port;
Loss value determination module 74 is used for first signal and signal detection module 73 detected secondary signals according to signal transmitting module 72 transmissions, confirms first loss value of first communication link to be tested.
The above-mentioned RRU that provides based on the embodiment of the invention, when needs changed first signal flowing in first communication link to be tested, above-mentioned RRU can further include module is set.This effect that module is set is that after loss value determination module 74 was confirmed first loss value, the mode of operation of first prevention at radio-frequency port was set to the acceptance test pattern, and the mode of operation of second prevention at radio-frequency port is set to the transmission test pattern.Further, after above-mentioned setting of module execution, signal transmitting module 72 can also be further used for sending first signal through second prevention at radio-frequency port; Signal detection module 73 also is used to detect the 3rd signal that first prevention at radio-frequency port receives from first communication link to be tested; Loss value determination module 74 also is used for first signal and signal detection module 73 detected the 3rd signals according to signal transmitting module 72 transmissions, confirms second loss value of first communication link to be tested.
First loss value and second loss value confirmed based on loss value determination module 74; The above-mentioned RRU that the embodiment of the invention provides can further include loss difference determination module; It is used for confirming 74 first loss value and second loss value according to the loss value determination module, confirms the up-downgoing loss difference of first communication link to be tested.
Preferably, above-mentioned signal transmitting module 72 also is used for after loss value determination module 74 is confirmed second loss value, and first prevention at radio-frequency port of confirming through the prevention at radio-frequency port determination module sends first signal;
Above-mentioned signal detection module 73 also is used to detect the 4th signal that the second definite prevention at radio-frequency port of prevention at radio-frequency port determination module receives from second communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port;
Above-mentioned loss value determination module 74 also is used for first signal and signal detection module 73 detected the 4th signals according to signal transmitting module 72 transmissions, confirms second loss value of second communication link to be tested.
Preferably, this RRU that the embodiment of the invention provides can also comprise loss difference determination module, is used for confirming the difference of second loss value of the loss value that loss value determination module 74 is confirmed and second communication link to be tested.
In addition, when chain route first link to be tested to be tested became second link to be tested, above-mentioned signal transmitting module 72 also was used for after loss value determination module 74 is confirmed first loss value, sending first signal through first prevention at radio-frequency port; Signal detection module 73 also is used to detect the 5th signal that second prevention at radio-frequency port receives from second communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port; 74 of loss value determination modules also are used for first signal and signal detection module 73 detected the 5th signals according to signal transmitting module 72 transmissions, confirm first loss value of second communication link to be tested.
Preferably; This RRU that the embodiment of the invention provides can further include loss difference determination module; First loss value of first communication link to be tested that this loss value determination module is used for confirming according to loss value determination module 74 and first loss value of second communication link to be tested are confirmed first loss value poor of first loss value and second communication link to be tested of first communication link to be tested.
Preferably, this RRU of providing of the embodiment of the invention can comprise:
Module is set, is used for after loss value determination module 74 is confirmed first loss value of second communication link to be tested, the mode of operation of first prevention at radio-frequency port is set to the acceptance test pattern, and the mode of operation of second prevention at radio-frequency port is set to the transmission test pattern;
Thereby signal transmitting module 72 can also be used for sending first signal through second prevention at radio-frequency port;
Loss value determination module 74 can also be used for first signal and signal detection module 73 detected the 4th signals according to signal transmitting module 72 transmissions, confirms second loss value of second communication link to be tested.
Preferably, the loss difference determination module that RRU comprises can also be used for first, second loss value according to the second definite communication link to be tested of loss value determination module, confirms the up-downgoing loss difference of second communication link to be tested.
Preferably, in first, second communication link to be tested, can have only a link to comprise mixer and the source device that is different from this RRU.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (20)
1. definite method of a link loss value is characterized in that, comprising:
Radio frequency remote unit RRU confirms that mode of operation is set to first prevention at radio-frequency port of transmission test pattern and second prevention at radio-frequency port that mode of operation is set to the acceptance test pattern from self-contained prevention at radio-frequency port;
RRU generates first signal, and sends first signal through first prevention at radio-frequency port; And
RRU detects the secondary signal that second prevention at radio-frequency port receives from first communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port; And
According to first signal and secondary signal, confirm first loss value of first communication link to be tested.
2. the method for claim 1 is characterized in that, RRU also comprises after confirming said first loss value:
The mode of operation of RRU first prevention at radio-frequency port is set to the acceptance test pattern, and the mode of operation of second prevention at radio-frequency port is set to the transmission test pattern;
RRU generates first signal, and sends first signal through second prevention at radio-frequency port; And
RRU detects the 3rd signal that first prevention at radio-frequency port receives from said first communication link to be tested; And
According to first signal and the 3rd signal, confirm second loss value of said first communication link to be tested.
3. method as claimed in claim 2 is characterized in that, also comprises:
According to said first loss value and said second loss value, confirm the up-downgoing loss difference of said first communication link to be tested.
4. method as claimed in claim 2 is characterized in that, confirms also to comprise after said second loss value:
RRU generates first signal, and sends first signal through second prevention at radio-frequency port; And
RRU detects the 4th signal that first prevention at radio-frequency port receives from second communication link to be tested; And
According to first signal and the 4th signal, confirm second loss value of said second communication link to be tested.
5. method as claimed in claim 4 is characterized in that, also comprises:
Confirm the difference of second loss value of said first loss value and said second communication link to be tested.
6. the method for claim 1 is characterized in that, RRU also comprises after confirming said first loss value:
RRU generates first signal, and sends first signal through first prevention at radio-frequency port; And
RRU detects the 5th signal that second prevention at radio-frequency port receives from second communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port; And
According to first signal and the 5th signal, confirm first loss value of said second communication link to be tested.
7. method as claimed in claim 6 is characterized in that, also comprises:
Confirm the difference of first loss value of first loss value and said second communication link to be tested of said first communication link to be tested.
8. method as claimed in claim 6 is characterized in that, RRU also comprises after confirming first loss value of said second communication link to be tested:
The mode of operation of RRU first prevention at radio-frequency port is set to the acceptance test pattern, and the mode of operation of second prevention at radio-frequency port is set to the transmission test pattern;
RRU generates first signal, and sends first signal through second prevention at radio-frequency port; And
RRU detects the 4th signal that first prevention at radio-frequency port receives from said second communication link to be tested; And
According to first signal and the 4th signal, confirm second loss value of said second communication link to be tested.
9. method as claimed in claim 8 is characterized in that, according to first, second loss value of said second communication link to be tested, confirms the up-downgoing loss difference of said second communication link to be tested.
10. like the arbitrary described method of claim 4～9, it is characterized in that in said first, second communication link to be tested, having only a link to comprise mixer and the source device that is different from said RRU.
11. a Remote Radio Unit is characterized in that, comprising:
The prevention at radio-frequency port determination module is used for the prevention at radio-frequency port that comprises from said Remote Radio Unit, confirms that mode of operation is set to first prevention at radio-frequency port of transmission test pattern and second prevention at radio-frequency port that mode of operation is set to the acceptance test pattern;
Signal transmitting module is used to generate first signal, and first prevention at radio-frequency port of confirming through the prevention at radio-frequency port determination module sends first signal;
Signal detection module is used to detect the secondary signal that the second definite prevention at radio-frequency port of prevention at radio-frequency port determination module receives from first communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port;
The loss value determination module is used for first signal and the detected secondary signal of signal detection module according to the signal transmitting module transmission, confirms first loss value of first communication link to be tested.
12. Remote Radio Unit as claimed in claim 11 is characterized in that, also comprises:
Module is set, is used for after the loss value determination module is confirmed first loss value, the mode of operation of first prevention at radio-frequency port is set to the acceptance test pattern, and the mode of operation of second prevention at radio-frequency port is set to the transmission test pattern; And
Said signal transmitting module also is used for sending first signal through second prevention at radio-frequency port;
Said signal detection module also is used to detect the 3rd signal that first prevention at radio-frequency port receives from said first communication link to be tested;
Said loss value determination module also is used for first signal and detected the 3rd signal of said signal detection module according to said signal transmitting module transmission, confirms second loss value of said first communication link to be tested.
13. Remote Radio Unit as claimed in claim 12 is characterized in that, also comprises:
Loss difference determination module is used for first loss value and second loss value definite according to said loss value determination module, confirms the up-downgoing loss difference of said first communication link to be tested.
14. Remote Radio Unit as claimed in claim 11 is characterized in that:
Said signal transmitting module also is used for after said loss value determination module is confirmed said second loss value, and first prevention at radio-frequency port of confirming through the prevention at radio-frequency port determination module sends first signal;
Said signal detection module also is used to detect the 4th signal that the second definite prevention at radio-frequency port of prevention at radio-frequency port determination module receives from second communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port;
The loss value determination module also is used for first signal and detected the 4th signal of signal detection module according to the signal transmitting module transmission, confirms second loss value of second communication link to be tested.
15. Remote Radio Unit as claimed in claim 14 is characterized in that, also comprises:
Loss difference determination module is used for confirming the difference of second loss value of said first loss value that the loss value determination module is confirmed and said second communication link to be tested.
16. Remote Radio Unit as claimed in claim 11 is characterized in that,
Said signal transmitting module also is used for after the loss value determination module is confirmed first loss value, sending first signal through first prevention at radio-frequency port;
Said signal detection module also is used to detect the 5th signal that second prevention at radio-frequency port receives from second communication link to be tested between first prevention at radio-frequency port and second prevention at radio-frequency port;
Said loss value determination module also is used for first signal and detected the 5th signal of said signal detection module according to said signal transmitting module transmission, confirms first loss value of said second communication link to be tested.
17. Remote Radio Unit as claimed in claim 16 is characterized in that, also comprises:
Loss difference determination module, the difference of first loss value of first communication link to be tested that is used for confirming that said loss value determination module is confirmed and first loss value of second communication link to be tested.
18. Remote Radio Unit as claimed in claim 16 is characterized in that, also comprises:
Module is set, is used for after the loss value determination module is confirmed first loss value of said second communication link to be tested, the mode of operation of first prevention at radio-frequency port is set to the acceptance test pattern, and the mode of operation of second prevention at radio-frequency port is set to the transmission test pattern; And
Said signal transmitting module also is used for sending first signal through second prevention at radio-frequency port;
Said signal detection module also is used to detect the 4th signal that first prevention at radio-frequency port receives from said second communication link to be tested;
Said loss value determination module also is used for first signal and detected the 4th signal of said signal detection module according to said signal transmitting module transmission, confirms second loss value of said second communication link to be tested.
19. Remote Radio Unit as claimed in claim 18 is characterized in that:
Said loss difference determination module also is used for first, second loss value according to definite said second communication link to be tested of said loss value determination module, confirms the up-downgoing loss difference of said second communication link to be tested.
20., it is characterized in that in said first, second communication link to be tested, having only a link to comprise mixer and the source device that is different from said RRU like the arbitrary described Remote Radio Unit of claim 14～19.
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