CN103684580B - The method of Remote Radio Unit and reporting links fault thereof, wireless communication system - Google Patents
The method of Remote Radio Unit and reporting links fault thereof, wireless communication system Download PDFInfo
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- CN103684580B CN103684580B CN201210319087.XA CN201210319087A CN103684580B CN 103684580 B CN103684580 B CN 103684580B CN 201210319087 A CN201210319087 A CN 201210319087A CN 103684580 B CN103684580 B CN 103684580B
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Abstract
Method, the wireless communication system of the open Remote Radio Unit of the present invention and reporting links fault thereof, the method comprising the steps of one, whether occur descending and/or uplink optical fibers link failure between RRU at the corresponding levels and upper level RRU, if enter step 2, otherwise enter step 3; Step 2, this upper level RRU calculate this RRU sequence number at the corresponding levels, reset, enter step 3 in conjunction with the corresponding relation of bit and predetermined rank order in fault warning control word to fault warning control word; Fault warning control word sends to upper level RRU again to return step one by step 3, this upper level RRU; Until first order RRU detects whether occur descending and/or uplink optical fibers link failure between BBU, fault warning control word is reported BBU by first order RRU.By above technical scheme, solve in prior art and cannot detect uplink optical fibers link failure, and BBU accurately cannot learn the problem of the downlink optical fiber link failure position nearest apart from it.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method of Remote Radio Unit reporting links fault, Remote Radio Unit and wireless communication system.
Background technology
In current wireless communication system, base station many employings baseband processing unit (BBU, BaseBandUnit) adds the distributed structure/architecture of Remote Radio Unit (RRU, RadioRemoteUnit).With Fiber connection between BBU and RRU, a BBU can support the RRU of multiple cascade.Interface between BBU and RRU follows common public radio interface (CPRI, CommonPublicRadioInterface) standard, each RRU has two light mouths, one from (Slave) light mouth, master (Master) light mouth, one of them light mouth is connected with upper level RRU or BBU, and another light mouth is connected with next stage RRU or another BBU, and each light mouth comprises receiving terminal (rx) and transmitting terminal (tx).According to practical application scene, between BBU and RRU, different networking modes can be had, comprise star-like, chain, looped network and two BBU backs up.
In CPRI interface standard, for the RRU of cascade, comprise the concept of predetermined rank order and self actual sequence number, predetermined rank order is for BBU, and self actual sequence number is for RRU.The corresponding one-level RRU of each predetermined rank order, be equivalent to the identification marking of RRU, BBU can pass through RRU corresponding to each predetermined rank order identification, simultaneously, the corresponding relation identification fault point of bit and predetermined rank order in the fault warning control word that BBU can also report according to RRU, usually, the predetermined rank order of the first order RRU that distance BBU is nearest is start sequence number, and the predetermined rank order of other RRU at different levels adds 1 successively by distance BBU order from the near to the remote.Self actual sequence number needs to be delivered to RRU at different levels by downlink optical fiber link, concrete: first order RRU receives by the downlink optical fiber link between BBU start sequence number that BBU issues or start sequence number subtracts 1, first order RRU using this start sequence number as self actual sequence number, first order RRU sends self actual sequence number of first order RRU by downlink optical fiber chain road direction second level RRU, second level RRU adds self actual sequence number that 1 obtains second level RRU on the basis of self actual sequence number of first order RRU, the like, RRU at different levels receives by downlink optical fiber link self actual sequence number that upper level RRU sends upper level RRU, and self actual sequence number is obtained from the mode adding 1 on the basis of self actual sequence number of this upper level RRU.RRU to the method for BBU reporting links fault is: RRU at the corresponding levels receives the fault warning control word that next stage RRU sends, RRU at the corresponding levels detects between itself and upper level RRU whether occur downlink optical fiber link failure, if, according to the corresponding relation of bit and predetermined rank order in the actual sequence number of RRU at the corresponding levels self and the fault warning control word set up in advance, upper level RRU is sent to after this downlink optical fiber link failure being inserted this fault warning control word corresponding bits position, upper level RRU sends upper level RRU more again to after carrying out same operation, RRU upwards forwards until BBU so step by step.
In chain networking mode, as shown in Figure 1, BBU0 is by optical fiber and three RRU cascades, form uplink optical fibers link and the downlink optical fiber link of Signal transmissions, downlink optical fiber link in this figure refers to signal and transfers to by BBU0 the link that the RRU0(optical fiber A0 that is adjacent formed), to be transferred to the link that RRU1(optical fiber A1 formed by RRU0), or transfer to by RRU1 the link that RRU2(optical fiber A2 formed); Uplink optical fibers link refers to signal and transfers to by RRU2 the link that RRU1(optical fiber B2 formed), to be transferred to the link that RRU0(optical fiber B1 formed by RRU1), or transfer to by RRU0 the link that BBU0(optical fiber B0 formed); In CPRI interface standard, these three RRU to the method for BBU0 reporting links fault are:
Step a, RRU2 detect between itself and RRU1 whether occur downlink optical fiber link failure (whether the link that namely optical fiber A2 is formed breaks down) from the rx end of Slave light mouth, if, to the corresponding relation of predetermined rank order, this downlink optical fiber link failure is inserted the corresponding bit of fault warning control word according to bit in self actual sequence number and default fault warning control word, again the tx end of this fault warning control word by Slave light mouth is sent to RRU1, if not, the initial value of fault warning control word is sent to RRU1;
Step c, the rx termination of the Master light mouth of RRU1 receives the fault warning control word of RRU2 transmission, RRU1 detects between itself and RRU0 whether occur downlink optical fiber link failure (whether the link that namely optical fiber A1 is formed breaks down) from the rx end of Slave port, if, according to self actual sequence number and above-mentioned corresponding relation, this downlink optical fiber link failure is inserted the fault warning control word that RRU2 passes to it, again the tx end of this fault warning control word by Slave light mouth is sent to RRU0, if not, initial value RRU2 being passed to its fault warning control word is sent directly to RRU0 by the tx end of Slave light mouth,
Steps d, the rx termination of the Master light mouth of RRU0 receives the fault warning control word of RRU1 transmission, RRU0 detects between itself and BBU0 whether occur downlink optical fiber link failure (whether the link that namely optical fiber A0 is formed breaks down) from the rx end of Slave port, if, according to self actual sequence number and above-mentioned corresponding relation, this downlink optical fiber link failure is inserted the fault warning control word that RRU1 passes to it, again the tx end of this fault warning control word by Slave light mouth is sent to BBU0, if not, former fault warning control word RRU1 being passed to it is sent directly to BBU0 by the tx end of Slave light mouth,
BBU0 receives by the rx termination of bbu_p1 light mouth the fault warning control word that RRU0 sends, according to the occurrence positions of this fault warning control word and above-mentioned corresponding relation identification fault.
Following defect is there is in the above-mentioned CPRI of utilization interface standard to the mode of BBU reporting links fault:
1, have uplink and downlink two optical fiber links between BBU and RRU, utilize CPRI interface standard, the fault of downlink optical fiber link can only be reported BBU by RRU, and cannot detect uplink optical fibers link failure.
2, according to CPRI interface standard, for RRU, self actual sequence number is transmitted by downlink optical fiber link.During downlink optical fiber link occurs fault between RRU at the corresponding levels and upper level RRU, the transmission of RRU sequence number can stop, RRU at the corresponding levels will be regarded as first order RRU, himself actual sequence number will be set to as start sequence number (being generally 0), and subordinate RRU can carry out obtaining self actual sequence number from adding according to this start sequence number, this self actual sequence number causing the RRU of RRU and its subordinate broken down to obtain and predetermined rank order are not inconsistent, that bit (such as corresponding with start sequence number bit 0) that the RRU that downlink optical fiber link failure occurs can only be corresponding with start sequence number in fault warning control word inserts optical fiber link fault warning, the RRU having the RRU representated by the bit of alarm and reality that downlink optical fiber link failure occurs in the fault warning control word causing BBU to receive does not conform to.
Summary of the invention
The invention provides a kind of method of Remote Radio Unit reporting links fault, Remote Radio Unit and wireless communication system, solve in prior art and cannot detect uplink optical fibers link failure, and BBU accurately cannot learn the problem of the position of the downlink optical fiber link failure nearest apart from it.
For solving the problems of the technologies described above, the present invention takes following technical scheme.
A method for Remote Radio Unit reporting links fault, described baseband processing unit, by optical fiber and multiple Remote Radio Unit cascade, forms uplink optical fibers link and the downlink optical fiber link of Signal transmissions; Wherein, downlink optical fiber link refers to signal and is transferred to the first order Remote Radio Unit be adjacent by baseband processing unit, or transfers to the next stage Remote Radio Unit be adjacent from Remote Radio Unit at the corresponding levels; Uplink optical fibers link refers to signal and is transferred to the upper level Remote Radio Unit be adjacent by Remote Radio Unit at the corresponding levels, or transfers to baseband processing unit by first order Remote Radio Unit, and the method comprises the following steps:
Step one, Remote Radio Unit at the corresponding levels detect between itself and adjacent upper level Remote Radio Unit whether occur downlink optical fiber link failure, described upper level Remote Radio Unit detects between itself and described Remote Radio Unit at the corresponding levels whether occur uplink optical fibers link failure, if there is one to break down in both, then enter step 2, if both all do not break down, enter, enter step 3;
Step 2, described upper level Remote Radio Unit obtain self actual sequence number by downlink optical fiber link, add 1, calculate the sequence number of described Remote Radio Unit at the corresponding levels according to self actual sequence number; According to the corresponding relation of bit and predetermined rank order in the sequence number of the Remote Radio Unit described at the corresponding levels obtained and default fault warning control word, be 1 or 0 by the corresponding bits position of the fault warning control word being sent to described upper level Remote Radio Unit by afterbody Remote Radio Unit step by step, contrary is 0 or 1 by other bit positions of described fault warning control word, enters, enters step 3;
Fault warning control word is sent to the again upper level Remote Radio Unit adjacent with described upper level Remote Radio Unit by step 3, described upper level Remote Radio Unit, returns step one;
Step 4 is until first order Remote Radio Unit detects between itself and baseband processing unit whether occur downlink optical fiber link failure, described baseband processing unit detects between itself and described first order Remote Radio Unit whether occur uplink optical fibers link failure, if both all do not break down, then fault warning control word is reported baseband processing unit by first order Remote Radio Unit.
Further, in step 4, if there is descending and/or uplink optical fibers link failure between first order Remote Radio Unit and baseband processing unit, after then fault warning control word is reported baseband processing unit by first order Remote Radio Unit, also comprise: described baseband processing unit is according to the predetermined rank order of described first order Remote Radio Unit and described corresponding relation, being 1 or 0 by the corresponding bits position of fault warning control word, is 0 or 1 by other bit positions of described fault warning control word on the contrary.
Further, in step 4, if there is downlink optical fiber link failure between first order Remote Radio Unit and baseband processing unit, before then fault warning control word is reported baseband processing unit by first order Remote Radio Unit, also comprise: first order Remote Radio Unit is according to self actual sequence number and described corresponding relation, being 1 or 0 by the corresponding bits position of described fault warning control word, is 0 or 1 by other bit positions of described fault warning control word on the contrary.
Further, step one is specially: described upper level Remote Radio Unit detects between itself and described Remote Radio Unit at the corresponding levels whether occur uplink optical fibers link failure, if so, then enters step 2; If not, described Remote Radio Unit at the corresponding levels detects between itself and described upper level Remote Radio Unit whether occur downlink optical fiber link failure; If so, then the described downlink optical fiber link failure detected is sent to described upper level Remote Radio Unit, enter step 2.
A kind of Remote Radio Unit, described Remote Radio Unit is by any one in multiple Remote Radio Unit of optical fiber and baseband processing unit cascade, described baseband processing unit and described multiple Remote Radio Unit form uplink optical fibers link and the downlink optical fiber link of Signal transmissions, wherein, downlink optical fiber link refers to signal and transfers to described Remote Radio Unit by baseband processing unit or adjacent upper level Remote Radio Unit, or transfer to adjacent next stage Remote Radio Unit by described Remote Radio Unit, uplink optical fibers link refers to signal and is transferred to the upper level Remote Radio Unit or baseband processing unit that are adjacent by described Remote Radio Unit, or transfer to described Remote Radio Unit by adjacent next stage Remote Radio Unit, described Remote Radio Unit comprises: downlink optical fiber link failure detection unit, self actual sequence number acquiring unit, sequence number computing unit, fault warning control word reset cell, fault warning transmitting element and fault warning receiving element, wherein,
Described downlink optical fiber link failure detection unit is adjacent between upper level Remote Radio Unit or baseband processing unit whether occur downlink optical fiber link failure for detecting described Remote Radio Unit;
Described fault warning transmitting element is used for the downlink optical fiber link failure gone out by described downlink optical fiber link failure detection unit inspection, and fault warning control word sends to described upper level Remote Radio Unit or baseband processing unit;
Described fault warning receiving element is for the downlink optical fiber link failure between the described Remote Radio Unit that receives adjacent next stage Remote Radio Unit and detect and described next stage Remote Radio Unit; Also for receiving the fault warning control word being sent to described Remote Radio Unit by afterbody Remote Radio Unit step by step;
Self actual sequence number acquiring unit described is used for obtaining self actual sequence number by downlink optical fiber link;
Described sequence number computing unit is used in the sequence number adding the described next stage Remote Radio Unit of 1 calculating according to the actual sequence number of described Remote Radio Unit self;
Described fault warning control word reset cell is used for the corresponding relation according to bit and predetermined rank order in the sequence number of described next stage Remote Radio Unit calculated and default fault warning control word, the corresponding bits position of the fault warning control word received by described fault warning receiving element is 1 or 0, is 0 or 1 on the contrary by other bit positions of described fault warning control word.
Further, if described Remote Radio Unit is the first order Remote Radio Unit adjacent with described baseband processing unit, then described fault warning control word reset cell is also for self actual sequence number and the described corresponding relation then according to described first order Remote Radio Unit, being 1 or 0 by the corresponding bits position of described fault warning control word, is 0 or 1 by other bit positions of described fault warning control word on the contrary.
Further, described Remote Radio Unit also comprises uplink optical fibers link failure detection unit, and described uplink optical fibers link failure detection unit is adjacent between next stage Remote Radio Unit whether occur uplink optical fibers link failure for detecting described Remote Radio Unit.
A kind of wireless communication system, comprising: the Remote Radio Unit of baseband processing unit and multiple cascade; Described Remote Radio Unit is the Remote Radio Unit described in above-mentioned any one; Described baseband processing unit is used for sending start sequence number by downlink optical fiber chain road direction first Remote Radio Unit, also with receiving the fault warning control word transmitted step by step through each Remote Radio Unit.
Further, if there is descending and/or uplink optical fibers link failure between first order Remote Radio Unit and baseband processing unit, described baseband processing unit is also for the corresponding relation according to bit and default sequence number in the default sequence number of first order Remote Radio Unit and default fault warning control word, being 1 or 0 by the corresponding bits position of fault warning control word, is 0 or 1 by other bit positions of described fault warning control word on the contrary.
Further, whether described baseband processing unit also there is uplink optical fibers link failure for detecting between described first order Remote Radio Unit.
Because RRU and BBU is cascade connection, the downlink optical fiber link failure of certain one-level RRU, this grade of RRU all RRU below cannot normally work, so for user, need most and to be concerned about and what determine is from the nearest fault point of BBU.In the present invention, if there is downlink optical fiber link failure between RRU at the corresponding levels and adjacent upper level RRU, self actual sequence number of RRU at the corresponding levels will be set to start sequence number, but, the sequence number of this upper level RRU is not subject to the impact of this fault, therefore, the sequence number adding this RRU at the corresponding levels that 1 calculates according to self actual sequence number of this upper level RRU resets the method for fault warning control word compared to prior art, improves accuracy; If this upper level RRU and also occurred downlink optical fiber link failure between upper level RRU again, self actual sequence number of this upper level RRU is caused also not to be inconsistent with its predetermined rank order, so by this again upper level RRU to the replacement of fault warning control word, make finally to report in the fault warning control word of BBU, only embody the position from the nearest downlink optical fiber link failure of BBU.
Accompanying drawing explanation
Fig. 1 is the wireless communication system schematic diagram of existing chain networking mode;
The flow chart of the method for the Remote Radio Unit reporting links fault that Fig. 2 provides for one embodiment of the invention;
The wireless communication system schematic diagram of the chain networking mode that Fig. 3 provides for one embodiment of the invention;
Fig. 4 in the wireless communication system shown in Fig. 3, the flow chart of the method for Remote Radio Unit reporting links fault;
The Remote Radio Unit schematic diagram that Fig. 5 provides for one embodiment of the invention.
Embodiment
In the present invention, BBU, by optical fiber and multiple RRU cascade, forms uplink optical fibers link and the downlink optical fiber link of Signal transmissions; Downlink optical fiber link refers to signal and is transferred to the first order RRU be adjacent by BBU, or transfers to the next stage RRU be adjacent from RRU at the corresponding levels; Uplink optical fibers link refers to signal and is transferred to the upper level RRU be adjacent by RRU at the corresponding levels, or transfers to BBU by first order RRU.Up, downlink optical fiber link failure includes but not limited to the various optical fiber link faults such as light signal loss, LOF.Fault warning control word includes but not limited to the alarm control word such as loss of signal alarm control word, LOF alarm control word.
The present invention, for the RRU of cascade, comprise the concept of predetermined rank order and self actual sequence number, predetermined rank order is for BBU, and self actual sequence number is for RRU.The corresponding one-level RRU of each predetermined rank order, be equivalent to the identification marking of RRU, BBU can pass through RRU corresponding to each predetermined rank order identification, simultaneously, the corresponding relation identification fault point of bit and predetermined rank order in the fault warning control word that BBU can also report according to RRU, usually, the predetermined rank order of the first order RRU that distance BBU is nearest is start sequence number, and the predetermined rank order of other RRU at different levels adds 1 successively by distance BBU order from the near to the remote.Therefore, the present invention needs the predetermined rank order presetting the RRU at different levels that BBU supports, and the bit of fault warning control word and the corresponding relation of predetermined rank order, such as setting is nearest with BBU, the predetermined rank order of namely adjacent with BBU first order RRU is start sequence number, and the predetermined rank order of other Remote Radio Unit at different levels adds 1 successively by distance BBU order from the near to the remote, again according to the number of the RRU of cascade, setting fault warning control word is made up of the bit of corresponding number, and set up the corresponding relation of bit and predetermined rank order in fault warning control word, make bit and predetermined rank order one_to_one corresponding, this corresponding relation is kept in BBU and RRU at different levels, BBU can pass through RRU corresponding to each predetermined rank order identification, according to the corresponding relation identification fault point of bit in the fault warning control word that RRU reports and predetermined rank order, RRU at different levels can according to self actual sequence number and this corresponding relation coupling fault warning control word corresponding bits position.Such as: BBU is by optical fiber cascade n RRU, predetermined rank order comprises 0 to n-1, so can set the fault warning control word be made up of n bit, and bit and predetermined rank order one_to_one corresponding, such as: position 0 is corresponding with sequence number 0, position 1 is corresponding with sequence number 1, position 2 is corresponding with sequence number 2, by that analogy, position n-1 is corresponding with sequence number n-1.
Self actual sequence number needs to be delivered to RRU at different levels by downlink optical fiber link, concrete: first order RRU receives by the downlink optical fiber link between BBU start sequence number that BBU issues or start sequence number subtracts 1, first order RRU using this start sequence number as self actual sequence number, first order RRU sends self actual sequence number of first order RRU by downlink optical fiber chain road direction second level RRU, second level RRU adds self actual sequence number that 1 obtains second level RRU on the basis of self actual sequence number of first order RRU, the like, RRU at different levels receives by downlink optical fiber link self actual sequence number that upper level RRU sends upper level RRU, and self actual sequence number is obtained from the mode adding 1 on the basis of self actual sequence number of this upper level RRU.For grade RRU of other except first order RRU, if there is fault in the downlink optical fiber link between itself and upper level RRU, all be not inconsistent causing himself and sequence with predetermined rank order in self actual sequence number of subordinate RRU thereafter, self actual sequence number of the RRU at the corresponding levels broken down will be set to start sequence number, sequence is all subject to the impact serialization again of this fault in self actual sequence number of subordinate RRU thereafter, but does not affect for self actual sequence number of the higher level RRU of sequence before it.For first order RRU, due to himself actual sequence number inherently start sequence number, no matter whether descending the and/or uplink optical fibers link therefore between itself and BBU breaks down, himself actual sequence number is consistent with its predetermined rank order all the time, and does not all affect the sequence number of other arbitrary RRU.
The method of the Remote Radio Unit reporting links fault that Fig. 2 provides for one embodiment of the invention, comprises following flow process:
S21, RRU at the corresponding levels detect between itself and adjacent upper level RRU whether occur downlink optical fiber link failure, described upper level RRU detects between itself and described RRU at the corresponding levels whether occur uplink optical fibers link failure, one is had to break down in both, if namely there is descending and/or uplink optical fibers link failure between RRU at the corresponding levels and adjacent upper level RRU, then enter step S22, if both all do not break down, enter, enter step S23;
Step S21 is specifically as follows: this upper level RRU detects between itself and this RRU at the corresponding levels whether occur uplink optical fibers link failure, if so, then enters step S22; If not, this RRU at the corresponding levels detects between itself and this upper level RRU whether occur downlink optical fiber link failure; If so, then this downlink optical fiber link failure detected and fault warning control word are sent to this upper level RRU, enter step S22, if not, this RRU at the corresponding levels only needs fault warning control word to send to this upper level RRU, enters step S23.
S22, this upper level RRU add the sequence number of this RRU at the corresponding levels of 1 calculating according to self actual sequence number, according to the corresponding relation of bit and predetermined rank order in the sequence number of this RRU at the corresponding levels calculated and default fault warning control word, be 1(or 0 by the corresponding bits position of fault warning control word), contrary is 0(or 1 by other bit positions of this fault warning control word), enter step S23;
Fault warning control word is sent to the again upper level RRU adjacent with this upper level RRU by S23, this upper level RRU, enters step S24;
Step S23 is specifically as follows: according to the corresponding relation of bit and predetermined rank order in the sequence number of this RRU at the corresponding levels calculated and default fault warning control word, being 1 by the corresponding bits position of this fault warning control word, is 0 by other bit positions of this fault warning control word on the contrary; Or being 0 by the corresponding bits position of this fault warning control word, is 1 by other bit positions of this fault warning control word on the contrary; Again the fault warning control word after replacement is sent to the again upper level RRU adjacent with this upper level RRU.
S24, repetition step S21 to S23, until first order RRU detects between itself and BBU whether occur downlink optical fiber link failure, described BBU detects between itself and described first order RRU whether occur uplink optical fibers link failure, if both all do not break down, then fault warning control word is reported BBU by first order RRU.
Because first order RRU does not exist adjacent upper level RRU, therefore, the RRU at the corresponding levels in step S21 does not comprise first order RRU, needs detection that is descending between supplementary first order RRU and BBU and/or uplink optical fibers link failure in step S24.
Further, in step S24, if there is descending and/or uplink optical fibers link failure between first order RRU and BBU, after then fault warning control word is reported BBU by first order RRU, also comprise: BBU is according to the predetermined rank order of described first order RRU and described corresponding relation, be 1(or 0 by the corresponding bits position of fault warning control word), be 0(or 1 by other bit positions of described fault warning control word on the contrary).
Or, in step S24, if there is downlink optical fiber link failure between first order RRU and BBU, before then fault warning control word is reported BBU by first order RRU, also comprise: first order RRU is according to self actual sequence number and described corresponding relation, be 1(or 0 by the corresponding bits position of described fault warning control word), be 0 (or 1) by other bit positions of described fault warning control word on the contrary, then the fault warning control word after resetting is reported BBU.
From above flow process, even if in step S21, downlink optical fiber link failure has been there is between RRU and adjacent upper level RRU at the corresponding levels, self actual sequence number of RRU at the corresponding levels is caused to be set to start sequence number, but, self actual sequence number of its upper level RRU is not subject to the impact of this fault, therefore, in step S22, the sequence number adding this RRU at the corresponding levels that 1 calculates according to self actual sequence number of this upper level RRU resets the method for fault warning control word compared to prior art, improves accuracy, even if this upper level RRU and also occurred downlink optical fiber link failure between upper level RRU again, self actual sequence number of this upper level RRU is caused also to be set to start sequence number, so by repeating step S21 to S23, upper level RRU is to the replacement of fault warning control word again, be specially: the corresponding bits position of fault warning control word is 1(or 0 by the sequence number adding this upper level RRU that 1 calculates according to self actual sequence number of this upper level RRU again), contrary is 0(or 1 by other bit positions of fault warning control word), make finally to report in the fault warning control word of BBU, only embody the position from the nearest downlink optical fiber link failure of BBU.
The wireless communication system of the chain networking mode that Fig. 3 provides for one embodiment of the invention, as shown in Figure 3, BBU0 is by optical fiber and three RRU cascades, form uplink optical fibers link and the downlink optical fiber link of Signal transmissions, downlink optical fiber link in this figure refers to signal and transfers to by BBU0 the link that the RRU0(optical fiber A0 that is adjacent formed), to be transferred to the link that RRU1(optical fiber A1 formed by RRU0), or transfer to by RRU1 the link that RRU2(optical fiber A2 formed); Uplink optical fibers link refers to signal and transfers to by RRU2 the link that RRU1(optical fiber B2 formed), to be transferred to the link that RRU0(optical fiber B1 formed by RRU1), or transfer to by RRU0 the link that BBU0(optical fiber B0 formed).Preset the predetermined rank order of RRU at different levels, and the bit of fault warning control word and the corresponding relation of this predetermined rank order, such as: setting is nearest with BBU, the predetermined rank order of namely adjacent with BBU RRU0 is start sequence number 0, the predetermined rank order of other RRU at different levels adds 1 successively by distance BBU0 order from the near to the remote, namely the predetermined rank order of RRU1 is 1, the predetermined rank order of RRU2 is 2, if optical fiber A0, the words that the link that A1 and A2 is formed all does not break down, self actual sequence number that RRUO obtains conforms to its predetermined rank order and is 0, self actual sequence number that RRU1 obtains conforms to its predetermined rank order and is 1, self actual sequence number that RRU2 obtains conforms to its predetermined rank order and is 2.Again according to the number of the RRU of cascade, setting fault warning control word is made up of 3 bits, such as: be position 2, position 1, position 0 from left to right successively; Finally set up the corresponding relation of bit and predetermined rank order in fault warning control word, make bit and predetermined rank order one_to_one corresponding, such as: position 0 is corresponding with sequence number 0, position 1 is corresponding with sequence number 1, position 2 is corresponding with sequence number 2, is kept at by this corresponding relation in BBU0 and RRU at different levels.In wireless communication system shown in Fig. 3, the method for Remote Radio Unit reporting links fault as shown in Figure 4, comprises the following steps:
S401, RRU1 detect between itself and RRU2 whether occur uplink optical fibers link failure (whether the link that namely optical fiber B2 is formed breaks down) from the rx end of Master port, if, the rx termination of the Master light mouth of RRU1 receives the initial value of the fault warning control word that RRU2 sends, enter step S403, if not, step S402 is entered.
S402, RRU2 detect between itself and RRU1 whether occur downlink optical fiber link failure (whether the link that namely optical fiber A2 is formed breaks down) from the rx end of Slave light mouth, if, the rx termination of the Master light mouth of RRU1 receives initial value and this downlink optical fiber link failure of the fault warning control word that RRU2 sends, enter step S403, if not, the rx termination of the Master light mouth of RRU1 receives the initial value of the fault warning control word that RRU2 sends, and enters step S404.
What RRU2 sent is the initial value of fault warning control word, as " 000 ", even if there is downlink optical fiber link failure (i.e. optical fiber A2 formed link) and/or uplink optical fibers link failure (i.e. optical fiber B2 formed link) between RRU2 and RRU1, all without the need to fault being inserted this fault warning control word by RRU2, this is different from the mode sending to RRU1 after prior art RRU2 resets this fault warning control word according to self the actual sequence number obtained again.
S403, RRU1 add the sequence number of 1 this RRU2 of calculating according to self the actual sequence number obtained, according to the corresponding relation of bit and predetermined rank order in the fault warning control word of preserving in the sequence number of the RRU2 calculated and RRU1, find out in the fault warning control word received in step S402 with this sequence number corresponding bits position, be 1 by this corresponding bits position, be 0 by other bit positions of this fault warning control word, enter step S404;
Fault warning control word is sent to the adjacent radio frequency remote unit RRU of upper level again 0 by S404, RRU1, enters step S405;
If all there is fault in the link that A1 and A2 is formed, then RRU1 is regarded as first order RRU, its self actual sequence number obtained is start sequence number 0, the sequence number that so RRU1 adds according to sequence number 0 RRU2 that 1 calculates is 1, according to the corresponding relation of bit and predetermined rank order in fault warning control word, sequence number 1 correspondence be position 1, so the position 1 of fault warning control word is set to 1 by RRU1, other bits (position 0 and position 2) are all set to 0, obtain fault warning control word 010, and send to RRU0.
If the link that A1 is formed does not break down, there is fault in the link that A2 is formed, no matter whether the link formed due to A0 breaks down, self actual sequence number that RRU0 obtains is consistent with its predetermined rank order all the time, and the sequence number of other arbitrary RRU is not all affected, therefore, self actual sequence number that RRU1 obtains is 1, the sequence number that RRU1 adds according to self actual sequence number the RRU2 that 1 calculates is 2, from the corresponding relation of bit and predetermined rank order in the fault warning control word of preserving in RRU1, sequence number 2 correspondence be position 2, so the position 2 of fault warning control word is set to 1 by RRU1, other bits (position 0 and position 1) are all set to 0, obtain fault warning control word 100, and send to RRU0.
If the link that A1 and A2 is formed all does not break down, in step S404, in the fault warning control word that RRU1 sends to RRU0 and step S402, the fault warning control word that RRU2 issues RRU1 is consistent, is the initial value " 000 " of fault warning control word.
The rx termination of the Master light mouth of S405, RRU0 receives the fault warning control word of RRU1 transmission.Be specially the initial value " 000 " of the fault warning control word in above-mentioned steps S402, or the fault warning control word 010 or 100 in above-mentioned steps S404.
S406, RRU0 detect between itself and RRU1 whether occur uplink optical fibers link failure (whether the link that namely optical fiber B1 is formed breaks down) from the rx end of Master port, if, the fault warning control word that the rx termination receipts RRU1 of the Master light mouth of RRU0 sends enters step S408, if not, step S407 is entered.
S407, RRU1 detect between itself and RRU0 whether occur downlink optical fiber link failure (whether the link that namely optical fiber A1 is formed breaks down) from the rx end of Slave light mouth, if, the rx termination of the Master light mouth of RRU0 receives fault warning control word and this downlink optical fiber link failure of RRU1 transmission, enter step S408, if not, the rx termination of the Master light mouth of RRU0 receives the fault warning control word of RRU1 transmission, enters step S409.
S408, RRU0 add the sequence number of 1 calculating RRU1 according to self the actual sequence number obtained, according to the corresponding relation of bit and predetermined rank order in the fault warning control word of preserving in the sequence number of the RRU1 calculated and RRU0, find out in the fault warning control word received in step S45 with this sequence number corresponding bits position, being 1 by this corresponding bits position, is 0 by other bit positions of this fault warning control word;
No matter whether the link formed due to A0 breaks down, self actual sequence number that RRU0 obtains is consistent with its predetermined rank order all the time, and the sequence number of other arbitrary RRU is not all affected, therefore, the sequence number that RRU0 adds according to self actual sequence number the RRU1 that 1 calculates is 1, no matter the fault warning control word received in step S45 is 010, 100 or 000, RRU0 is according to the corresponding relation of bit and predetermined rank order in the fault warning control word of preserving in the sequence number 1 of RRU1 and RRU0, sequence number 1 correspondence be the position 1 of fault warning control word, so the position 1 of the fault warning control word received in step S45 is set to 1 by RRU0, other bits (position 0 and position 2) are all set to 0, obtain fault warning control word 010.
Fault warning control word is sent to BBU0 by S409, RRU0.
S410, BBU0 receive the fault warning control word of RRU0 transmission by the rx termination of bbu_p1 light mouth, BBU0 detects between itself and RRU0 whether occur uplink optical fibers link failure (whether the link that namely optical fiber B0 is formed breaks down) by the rx end of bbu_p1 light mouth, if, enter step S412, if not, step S411 is entered.
S411, RRU0 detect between itself and BBU0 whether occur downlink optical fiber link failure (whether the link that namely optical fiber A0 is formed breaks down) from the rx end of Slave light mouth, if so, enter step S412, if not, enter step S413.
S412, BBU0 are according to the corresponding relation of bit and predetermined rank order in the fault warning control word of preserving in the predetermined rank order (in other words start sequence number) of RRU0 and BBU0, find out in the fault warning control word received in step S409 with this sequence number corresponding bits position, be 1 by this corresponding bits position, be 0 by other bit positions of this fault warning control word, enter step S413.
Concrete, predetermined rank order due to RRU0 is 0, in the fault warning control word of preserving in BBU0 bit and predetermined rank order corresponding relation in, sequence number 0 correspondence be position 0, therefore, the position 0 of the fault warning control word received in step S409 is set to 1 by BBU0, other bits (position 1 and position 2) are all set to 0, obtain fault warning control word 001, from fault warning control word 001, to be predetermined rank order be 0 that one-level RRU there is optical fiber link fault.
S413, BBU0 are according to the corresponding relation identifiable design fault point of bit and predetermined rank order in the fault warning control word of preserving in this fault warning control word and BBU0, such as: if fault warning control word is 001, by bit in fault warning control word corresponding with the known position of the corresponding relation of predetermined rank order 0 be sequence number 0, it can thus be appreciated that, to be predetermined rank order be 0 RRU0 there is optical fiber link fault; If fault warning control word is 010, by bit in fault warning control word corresponding with the known position of the corresponding relation of predetermined rank order 1 be sequence number 1, it can thus be appreciated that, to be predetermined rank order be 1 RRU1 there is optical fiber link fault.
In another embodiment, step S409 to S412 can take following manner to substitute: RRU0 detects between itself and BBU0 whether occur downlink optical fiber link failure (whether the link that namely optical fiber A0 is formed breaks down) from the rx end of Slave light mouth, if, RRU0 is according to the corresponding relation of bit and predetermined rank order in the fault warning control word of preserving in self actual sequence number and BBU0, be 1 by the corresponding bits position of the fault warning control word finally obtained in step S408, contrary is 0 by other bit positions of this fault warning control word, again fault warning control word is sent to BBU0.
The present invention also provides a kind of Remote Radio Unit, this Remote Radio Unit is by any one in multiple Remote Radio Unit of optical fiber and baseband processing unit cascade, the Remote Radio Unit of baseband processing unit and the plurality of cascade forms uplink optical fibers link and the downlink optical fiber link of Signal transmissions, wherein, downlink optical fiber link refers to signal and transfers to described Remote Radio Unit by baseband processing unit or adjacent upper level Remote Radio Unit, or transfer to adjacent next stage Remote Radio Unit by described Remote Radio Unit, uplink optical fibers link refers to signal and is transferred to the upper level Remote Radio Unit or baseband processing unit that are adjacent by described Remote Radio Unit, or transfer to described Remote Radio Unit by adjacent next stage Remote Radio Unit, as shown in Figure 5, Remote Radio Unit 5 provided by the invention comprises: downlink optical fiber link failure detection unit 51, self actual sequence number acquiring unit 52, sequence number computing unit 53, fault warning control word reset cell 54, fault warning transmitting element 55 and fault warning receiving element 56, wherein,
Downlink optical fiber link failure detection unit 51 is adjacent between upper level Remote Radio Unit or baseband processing unit whether occur downlink optical fiber link failure for detecting this Remote Radio Unit 5;
The downlink optical fiber link failure of fault warning transmitting element 55 for downlink optical fiber link failure detection unit 51 is detected, and fault warning control word sends to this upper level Remote Radio Unit or baseband processing unit;
Fault warning receiving element 56 is for the downlink optical fiber link failure between this Remote Radio Unit 5 of receiving adjacent next stage Remote Radio Unit and detecting and this next stage Remote Radio Unit; Also for receiving the fault warning control word being sent to this Remote Radio Unit 5 by afterbody Remote Radio Unit step by step;
Self actual sequence number acquiring unit 52 obtains self actual sequence number by downlink optical fiber link;
Sequence number computing unit 53 is in the sequence number adding its next stage Remote Radio Unit of 1 calculating according to self actual sequence number of this Remote Radio Unit 5;
Fault warning control word reset cell 54 is for the corresponding relation according to bit and predetermined rank order in the sequence number of this next stage Remote Radio Unit calculated and default fault warning control word, the corresponding bits position of the fault warning control word received by this fault warning receiving element 56 is 1 or 0, is 0 or 1 on the contrary by other bit positions of this fault warning control word.
Further, if this Remote Radio Unit 5 is the first order Remote Radio Unit adjacent with baseband processing unit, then this fault warning control word reset cell 54 is also for self actual sequence number and this corresponding relation then according to this first order Remote Radio Unit, being 1 or 0 by the corresponding bits position of fault warning control word, is 0 or 1 by other bit positions of this fault warning control word on the contrary.
Further, this Remote Radio Unit 5 also comprises uplink optical fibers link failure detection unit 57, is adjacent between next stage Remote Radio Unit whether occur uplink optical fibers link failure for detecting this Remote Radio Unit 5.
The present invention also provides a kind of wireless communication system, comprising: the Remote Radio Unit of baseband processing unit and multiple cascade, and this Remote Radio Unit is for shown in above-mentioned Fig. 5; This baseband processing unit is used for sending start sequence number by downlink optical fiber chain road direction first Remote Radio Unit, also with receiving the fault warning control word transmitted step by step through each Remote Radio Unit.
Further, if there is descending and/or uplink optical fibers link failure between first order Remote Radio Unit and baseband processing unit, baseband processing unit is also for the corresponding relation according to bit and default sequence number in the default sequence number of first order Remote Radio Unit and default fault warning control word, being 1 or 0 by the corresponding bits position of fault warning control word, is 0 or 1 by other bit positions of described fault warning control word on the contrary.
Further, whether baseband processing unit also there is uplink optical fibers link failure for detecting between described first order Remote Radio Unit.
The present invention is applicable to any networking mode between BBU and RRU, as star-like, chain, looped network and two BBU back up.Because RRU and BBU is cascade connection, the downlink optical fiber link failure of certain one-level RRU, this grade of RRU all RRU below cannot normally work, so for user, need most and to be concerned about and what determine is from the nearest fault point of BBU.In the present invention, if there is downlink optical fiber link failure between RRU at the corresponding levels and adjacent upper level RRU, self actual sequence number of RRU at the corresponding levels will be set to start sequence number, but, the sequence number of this upper level RRU is not subject to the impact of this fault, therefore, the sequence number adding this RRU at the corresponding levels that 1 calculates according to self actual sequence number of this upper level RRU resets the method for fault warning control word compared to prior art, improves accuracy; If this upper level RRU and also occurred downlink optical fiber link failure between upper level RRU again, self actual sequence number of this upper level RRU is caused also not to be inconsistent with its predetermined rank order, so by this again upper level RRU to the replacement of fault warning control word, make finally to report in the fault warning control word of BBU, only embody the position from the nearest downlink optical fiber link failure of BBU.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a method for Remote Radio Unit reporting links fault, baseband processing unit, by optical fiber and multiple Remote Radio Unit cascade, forms uplink optical fibers link and the downlink optical fiber link of Signal transmissions; Wherein, downlink optical fiber link refers to signal and is transferred to the first order Remote Radio Unit be adjacent by baseband processing unit, or transfers to the next stage Remote Radio Unit be adjacent from Remote Radio Unit at the corresponding levels; Uplink optical fibers link refers to signal and is transferred to the upper level Remote Radio Unit be adjacent by Remote Radio Unit at the corresponding levels, or transfers to baseband processing unit by first order Remote Radio Unit, and it is characterized in that, the method comprises the following steps:
Step one, Remote Radio Unit at the corresponding levels detect between itself and adjacent upper level Remote Radio Unit whether occur downlink optical fiber link failure, described upper level Remote Radio Unit detects between itself and described Remote Radio Unit at the corresponding levels whether occur uplink optical fibers link failure, if there is one to break down in both, then enter step 2, if both all do not break down, enter, enter step 3;
Step 2, described upper level Remote Radio Unit obtain self actual sequence number by downlink optical fiber link, add the sequence number of the described Remote Radio Unit at the corresponding levels of 1 calculating according to self actual sequence number; According to the corresponding relation of bit and predetermined rank order in the sequence number of the Remote Radio Unit described at the corresponding levels obtained and default fault warning control word, be 1 or 0 by the corresponding bits position of the fault warning control word being sent to described upper level Remote Radio Unit by afterbody Remote Radio Unit step by step, contrary is 0 or 1 by other bit positions of described fault warning control word, enters, enters step 3;
Fault warning control word is sent to the again upper level Remote Radio Unit adjacent with described upper level Remote Radio Unit by step 3, described upper level Remote Radio Unit, returns step one;
Step 4 is until first order Remote Radio Unit detects between itself and baseband processing unit whether occur downlink optical fiber link failure, described baseband processing unit detects between itself and described first order Remote Radio Unit whether occur uplink optical fibers link failure, if both all do not break down, then fault warning control word is reported baseband processing unit by first order Remote Radio Unit.
2. the method for Remote Radio Unit reporting links fault as claimed in claim 1, it is characterized in that, in step 4, if there is descending and/or uplink optical fibers link failure between first order Remote Radio Unit and baseband processing unit, after then fault warning control word is reported baseband processing unit by first order Remote Radio Unit, also comprise: described baseband processing unit is according to the predetermined rank order of described first order Remote Radio Unit and described corresponding relation, be 1 or 0 by the corresponding bits position of fault warning control word, contrary is 0 or 1 by other bit positions of described fault warning control word.
3. the method for Remote Radio Unit reporting links fault as claimed in claim 1, it is characterized in that, in step 4, if there is downlink optical fiber link failure between first order Remote Radio Unit and baseband processing unit, before then fault warning control word is reported baseband processing unit by first order Remote Radio Unit, also comprise: first order Remote Radio Unit is according to self actual sequence number and described corresponding relation, being 1 or 0 by the corresponding bits position of described fault warning control word, is 0 or 1 by other bit positions of described fault warning control word on the contrary.
4. the method for the Remote Radio Unit reporting links fault as described in any one of claims 1 to 3, it is characterized in that, step one is specially: described upper level Remote Radio Unit detects between itself and described Remote Radio Unit at the corresponding levels whether occur uplink optical fibers link failure, if so, then step 2 is entered; If not, described Remote Radio Unit at the corresponding levels detects between itself and described upper level Remote Radio Unit whether occur downlink optical fiber link failure; If so, then the described downlink optical fiber link failure detected is sent to described upper level Remote Radio Unit, enter step 2.
5. a Remote Radio Unit, described Remote Radio Unit is by any one in multiple Remote Radio Unit of optical fiber and baseband processing unit cascade, described baseband processing unit and described multiple Remote Radio Unit form uplink optical fibers link and the downlink optical fiber link of Signal transmissions, wherein, downlink optical fiber link refers to signal and transfers to described Remote Radio Unit by baseband processing unit or adjacent upper level Remote Radio Unit, or transfer to adjacent next stage Remote Radio Unit by described Remote Radio Unit, uplink optical fibers link refers to signal and is transferred to the upper level Remote Radio Unit or baseband processing unit that are adjacent by described Remote Radio Unit, or transfer to described Remote Radio Unit by adjacent next stage Remote Radio Unit, it is characterized in that, described Remote Radio Unit comprises: downlink optical fiber link failure detection unit, self actual sequence number acquiring unit, sequence number computing unit, fault warning control word reset cell, fault warning transmitting element and fault warning receiving element, wherein,
Described downlink optical fiber link failure detection unit is adjacent between upper level Remote Radio Unit or baseband processing unit whether occur downlink optical fiber link failure for detecting described Remote Radio Unit;
Described fault warning transmitting element is used for the downlink optical fiber link failure gone out by described downlink optical fiber link failure detection unit inspection, and fault warning control word sends to described upper level Remote Radio Unit or baseband processing unit;
Described fault warning receiving element is for the downlink optical fiber link failure between the described Remote Radio Unit that receives adjacent next stage Remote Radio Unit and detect and described next stage Remote Radio Unit; Also for receiving the fault warning control word being sent to described Remote Radio Unit by afterbody Remote Radio Unit step by step;
Self actual sequence number acquiring unit described is used for obtaining self actual sequence number by downlink optical fiber link;
Described sequence number computing unit is used in the sequence number adding the described next stage Remote Radio Unit of 1 calculating according to the actual sequence number of described Remote Radio Unit self;
Described fault warning control word reset cell is used for the corresponding relation according to bit and predetermined rank order in the sequence number of described next stage Remote Radio Unit calculated and default fault warning control word, the corresponding bits position of the fault warning control word received by described fault warning receiving element is 1 or 0, is 0 or 1 on the contrary by other bit positions of described fault warning control word.
6. Remote Radio Unit as claimed in claim 5, it is characterized in that, if described Remote Radio Unit is the first order Remote Radio Unit adjacent with described baseband processing unit, then described fault warning control word reset cell is also for self actual sequence number and the described corresponding relation then according to described first order Remote Radio Unit, being 1 or 0 by the corresponding bits position of described fault warning control word, is 0 or 1 by other bit positions of described fault warning control word on the contrary.
7. the Remote Radio Unit as described in claim 5 or 6, it is characterized in that, described Remote Radio Unit also comprises uplink optical fibers link failure detection unit, and described uplink optical fibers link failure detection unit is adjacent between next stage Remote Radio Unit whether occur uplink optical fibers link failure for detecting described Remote Radio Unit.
8. a wireless communication system, is characterized in that, comprising: the Remote Radio Unit of baseband processing unit and multiple cascade; Described Remote Radio Unit is the Remote Radio Unit as described in any one of claim 5 to 7; Described baseband processing unit is used for sending start sequence number by downlink optical fiber chain road direction first Remote Radio Unit, also with receiving the fault warning control word transmitted step by step through each Remote Radio Unit.
9. wireless communication system as claimed in claim 8, it is characterized in that, if there is descending and/or uplink optical fibers link failure between first order Remote Radio Unit and baseband processing unit, described baseband processing unit is also for the corresponding relation according to bit and default sequence number in the default sequence number of first order Remote Radio Unit and default fault warning control word, being 1 or 0 by the corresponding bits position of fault warning control word, is 0 or 1 by other bit positions of described fault warning control word on the contrary.
10. wireless communication system as claimed in claim 9, is characterized in that, whether described baseband processing unit also occurs uplink optical fibers link failure for detecting between described first order Remote Radio Unit.
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| CN108063677A (en) * | 2016-11-09 | 2018-05-22 | 大唐移动通信设备有限公司 | A kind of method and failure detector for being classified position receiver link failure |
| CN106656318B (en) * | 2016-12-30 | 2019-03-05 | 上海电信工程有限公司 | Base station test method and system |
| CN110012490B (en) * | 2018-01-04 | 2021-10-15 | 中兴通讯股份有限公司 | Alarm method, alarm device, operation maintenance center and computer readable storage medium |
| CN111200515B (en) * | 2018-11-20 | 2022-12-06 | 中国移动通信集团内蒙古有限公司 | Alarm processing method and device |
| CN114079959B (en) * | 2020-08-13 | 2023-08-04 | 大唐移动通信设备有限公司 | Abnormality positioning method and device, electronic equipment and storage medium |
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