CN100438689C - Method for setting up parameters in compress mode in CDMA system - Google Patents
Method for setting up parameters in compress mode in CDMA system Download PDFInfo
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Abstract
The present invention relates to a collocation method of compression mode parameters of a CDMA system, which comprises the steps that when the system requires to start a compression mode, the required sequence number of the compression mode is determined; a sequence parameter of each compression mode is respectively collocated according to network plan parameters. By the present invention, the required sequence of a compression mode is collocated at real time according to the number of adjacent areas of the current different frequency or a different system of the district and the wireless environment of the district; the success rate for starting the compression mode is improved.
Description
Technical field
The present invention relates to the mobile communication technology field, be specifically related to the collocation method of desired compression mode parameter when compressed-mode parameter collocation method, particularly UE (subscriber equipment) carry out hard cut measurement in a kind of code division multiple access system.
Background technology
At present,, the network optimization and signal quality are had higher requirement, obtained increasingly extensive application based on the 3G (Third Generation) Moblie technology of CDMA (code division multiple access) system along with the expansion of network size and the continuous increase of number of users.Because mobile communication system adopts honeycomb, so travelling carriage must carry out handover when crossing over the sub-district of spatial division, promptly finish the transfer of travelling carriage, and the corresponding transfer of switching center is arrived in the base station to RNC (radio network controller) and RNC to the air interface of base station.3G (3G (Third Generation) Moblie) system will realize soft handover in the minizone of using same carrier frequencies, be that the mobile subscriber can connect simultaneously with the base station of two sub-districts when distinguishing more, only corresponding change spreading code, can accomplish the function of exchange of " connect again earlier and disconnect ", thereby improve the speech quality when switching greatly.But in order to guarantee the seamless covering of sub-district, the switching of the minizone of different carrier frequency still needs to use direct-cut operation, i.e. the alien frequencies direct-cut operation; And consider the transition of 2G (second generation mobile communication) to 3G, the seamless covering of assurance customer service needs to realize the switching of different system, i.e. switching between CDMA and GSM (global mobile communication) system.
For switching between alien frequencies direct-cut operation and system, from implementation, can be divided into blind switching again and based on the switching of measuring.Blind switching mode does not need terminal to measure, and is determined whether switching by RNC (radio network controller) fully.In general, RNC can be according to the position at terminal place, and whether decision switches, and switches to other sub-districts according to predetermined setting.This mode realizes simply.But have several GSM sub-districts around the common CDMA sub-district, thereby be difficult to determine suitable Target cell, so just cause to proceed to by the way of blind switching the direct-cut operation of 2G cell by the mode of blind switching.Based on the switching of measuring, be meant that terminal measures the signal of adjacent sub-district, test result is reported RNC, determine whether switching by RNC.
Switch between TDD (time division duplex) switching and system for alien frequencies direct-cut operation, FDD (Frequency Division Duplexing (FDD)), need measure the Target cell that switches, the frequency of these measurements is different with the frequency of current UE work usually, needs to carry out different-frequency measure and isosystem measurement.Because the characteristics of fdd mode are that system receives and transmits on two symmetrical frequency channels that separate, receive and transfer channel with guaranteeing that frequency range is separated, therefore, under the cdma system fdd mode, if downstream signal takies in time always, then UE will receive descending data continuously, its receiver just can not receive the signal of other frequencies when receiving the work at present frequency signal, at this moment, if UE does not possess under the situation of double-receiver condition, must support compact model, so that carry out measurement to another carrier frequency.
Compact model is a kind of mechanism that produces certain idle periods in radio frames, and UE (subscriber equipment) can carry out between frequency or the measurement of intersystem cell by these idle periods.As shown in Figure 1:
In downlink compression mode, form the transmission data " slit " of a period of time by technology such as sign indicating number punchings, in this section slit, any data are not transmitted to travelling carriage in the base station.Travelling carriage can utilize this slit that its radio-frequency transmitter is transformed into the target frequency that needs supervision, and target frequency is measured.
After in radio frames, parameters such as the length in compact model GAP (space), repetition period being configured, generated concrete compressed mode pattern, started all compressed mode pattern of calling in a plurality of measuring processes simultaneously and formed a compressed mode pattern sequence.
The configuration parameter of a compressed mode pattern is as shown in Figure 2:
Comprise two sections of TG pattern1 and TG pattern2 in one-period, wherein, TG pattern2 is optional.TGPL1 (length of transmission space pattern 1) and TGPL2 (length of transmission space pattern 2) have determined the Cycle Length of compressed mode pattern, and TGSN (the transmission space begins timeslot number), TGL1 (length in transmission space 1), TGL2 (length in transmission space 2), TGD (transmission gapping interval) have determined the position of GAP.GAP1 and GAP2 are the length of GAP, and scope is 0～14slot (time slot), are distributed in 1 to 2 frame.In addition, TGCFN (transmission space control frame Connection Frame Number) has determined to start in the compressed mode pattern sequence moment of article one compressed mode pattern, and compression slit active time displacement Δ CFN is the back compressed mode pattern that starts in the compressed mode pattern time deviation with respect to last the compressed mode pattern that starts.
Usually, the measurement that needs during switching has multiple, and this just needs configuration many TGPS (compressed mode sequence).Such as, stipulated to be used for 3 kinds of TGPS that GSM measures in 3GPP (third generation partnership project) agreement, be respectively applied for: GSM Carrier RSSI (indication of GSM carrier frequency received signal intensity) measures, initial BSIC (base station identity code) confirms to measure, BSIC heavily confirms to measure.Article three, compressed mode sequence has different start-up times, pattern and repetition period.In order to guarantee the channel transmission quality during starting compact model, stipulated to have in continuous three frames above two frames to be accounted for by GAP; And at any time the GAP of compact model can not be overlapping, otherwise conflict phenomenon will appear.Conflict between the so-called compact model is meant the situation in the slit that has occurred a plurality of compact models generations in the middle of same radio frames.When having many compressed mode sequence at the same time, produce conflict possibly.
As shown in Figure 3, when the repetition period, two identical compact models existed simultaneously, the result of stack was exactly the slit that two compact models are arranged in same frame, thereby produced conflict.
Usually, to the not constraint of repetition period of compact model, if two compressed mode period differences after repeatedly repeating, conflict also may occur in certain frame.As shown in Figure 4, the cycle of two compact models is respectively 8 and 7, not conflict in the period 1 of two compact models, but conflict has appearred in the period 3.
This conflict will cause for realizing mistake between system's each several part of compact model cooperation: the physical layer at network side can not realize, can not realize when mobile station side has a plurality of measurement purpose at the same time.
In view of above reason, in cdma system, avoid conflict between the simultaneous compressed mode sequence with most important.
Usually, for the configuration of compact model be on the backstage by artificial pre-configured parameter, such as, obtaining by emulation needs several compressed mode pattern parameters of disposing in several typical application scenes, no longer revise in system's running.When needs start different-frequency measure or isosystem measurement, RNC (radio network controller) reads these pre-configured parameters, directly it is sent to NodeB (base station) and UE (user terminal) by signaling message, the compressed mode sequence parameter is not done inspection during this.
Use this configuration mode,, then can not be optimized these configuration parameters in real time, can not adapt to the variation of wireless environment in case the sub-district wireless environment changes.There are two frames of surpassing to be taken in conflict or continuous three frames if produced between the compact model, then can not satisfy the measurement demand, but also can influence the transmission quality of channel by GAP.
Summary of the invention
The purpose of this invention is to provide compressed-mode parameter collocation method in a kind of code division multiple access system, can not change the shortcoming that in real time compressed-mode parameter is optimized according to cell environment to overcome available technology adopting static configuration mode, make compressed mode sequence satisfy system requirements better.
For this reason, the invention provides following technical scheme:
A kind of code division multiple access system compressed-mode parameter collocation method, described method comprises:
When described system need start compact model, determine required compressed mode sequence number;
Be respectively each compressed mode sequence configuration parameter according to network planning parameter, described network planning parameter comprises the adjacent area number of current alien frequencies in sub-district or different system, the user velocity feature of cell coverage area.
The described step that is respectively each compressed mode sequence configuration parameter according to network planning parameter comprises:
Determine the transmission gap lengths and the transmission space modal length of compressed mode pattern according to described network planning parameter;
Begin timeslot number and transmission gapping interval according to described definite transmission gap lengths and modal length configuration transmission space, transmission space; When many compressed mode sequence of needs, dispose and adjust every compressed mode sequence respectively with respect to the offset CFN in the initial moment of compressed mode sequence of configuration before it, make it satisfy the compressed mode sequence condition for validity.
Determine that according to the network planning parameter transmission gap lengths of compressed mode sequence and the step of transmission space modal length comprise:
Described transmission gap lengths is directly proportional with described alien frequencies or different system adjacent area number, and is directly proportional with the translational speed of described system cell;
Described transmission space modal length and described alien frequencies or different system adjacent area number are inversely proportional to, and are inversely proportional to the translational speed of described system cell.
Disposing and adjust every compressed mode sequence respectively comprises with respect to the step of the offset CFN in the initial moment of compressed mode sequence of configuration before it:
Select the compressed mode sequence of configuration respectively, dispose its initial Δ CFN,
Check the validity of the compressed mode sequence of described correspondence according to described initial Δ CFN;
Adjust described initial Δ CFN according to check result.
The step of validity of checking the compressed mode sequence of described correspondence according to described initial Δ CFN comprises:
Determine the inspection length M=M1+M2+M3 of described compressed mode sequence, wherein,
M1 is the least common multiple of all compressed mode sequence length,
M2 be the configuration the last item compressed mode sequence with respect to the 1st compressed mode sequence deviation,
M3 checks the length surplus, and M3 〉=N-1, N represent and can not have the slit by the N continuous frame;
In described inspection length to the inspection that conflicts of described compressed mode sequence;
In described inspection length, described compressed mode sequence is carried out continuous slit and take the frame number inspection;
When described compressed mode sequence does not have the slit to take conflict and continuously to take frame number maximum continuously when the slit takies frame number less than what allow in the slit, this compressed mode sequence is effective.
The step of adjusting described initial Δ CFN according to check result is specially:
When described compressed mode sequence need to select the compressed mode sequence adjusted invalid, make its initial Δ CFN increase a predetermined step-length.
Described predetermined step-length is 1 frame.
The step of determining required compressed mode sequence number comprises:
When the Target cell of described direct-cut operation is alien-frequency district, need a compressed mode sequence;
When the Target cell of described direct-cut operation is different system cell, need many compressed mode sequence.
Described method also comprises:
When the transmission space of described compressed mode sequence was the single frames pattern, described transmission space was positioned at the centre of this frame;
When the transmission space of described compressed mode sequence was two frame pattern, described transmission space was positioned at the centre of this two frame.
By above technical scheme provided by the invention as can be seen, the present invention disposes required compressed mode sequence adaptively according to the current alien frequencies in this sub-district or different system adjacent area number and sub-district wireless environment; When many compressed mode sequence of needs, by disposing and adjust the Δ CFN value of every compressed mode sequence, make its corresponding compressed mode sequence effective, this real-time configuration mode can adapt to the needs of different districts environmental change, finish validity check fast to compressed mode sequence, realize distributing rationally of compressed mode sequence, thereby improved the success rate of compression mode starting.
Description of drawings
Fig. 1 is a compressed mode pattern frame structure schematic diagram;
Fig. 2 is a compressed mode pattern parameter schematic diagram;
Fig. 3 is the schematic diagram that produces conflict between the identical compressed mode pattern of repetition period;
Fig. 4 is the schematic diagram that produces conflict between the repetition period compressed mode pattern inequality;
Fig. 5 is the realization flow of the inventive method;
Fig. 6 has the occupied situation schematic diagram of continuous 3 frames in the radio frames of two compact models stack;
Fig. 7 is the schematic diagram that utilizes sliding window check-up GAP occupancy;
Fig. 8 is a compressed mode pattern validity check flow process;
Fig. 9 is that the multisequencing compact model is adjusted flow chart;
Figure 10 is that initial BSIC confirms the compact model void ratio and measures maximum time emulation graph of a relation;
Figure 11 is that BSIC heavily confirms the compact model void ratio and measures maximum time emulation graph of a relation.
Embodiment
Core of the present invention is when system need start compact model, the Target cell characteristic of Qie Huaning as required, determine required compressed mode sequence number, then, some projecting parameter according to network, such as the adjacent area number of survey alien frequencies or different system, different sub-district wireless environments etc., dispose the parameter of each compressed mode pattern adaptively.When many compressed mode pattern of needs,, make its corresponding compressed mode pattern sequence effective by disposing and adjust the compression slit active time displacement value of every compressed mode pattern.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 5, Fig. 5 is the realization flow figure of the inventive method:
Step 501: when system need start compact model, determine required compressed mode sequence number.
In cdma system, needed different-frequency measure or isosystem measurement are all a kind of incessantly when carrying out direct-cut operation usually, therefore need one to multiple compressed mode sequence.Such as, if having only alien-frequency district to measure, then compressed mode sequence only need dispose 1, if different system cell is measured, then compressed mode sequence may need to dispose three.
Measure for GSM, generally comprise that GSM Carrier rssi measurement, initial BSIC are confirmed to measure, BSIC heavily confirms to measure, just will use three compressed mode sequence.Article three, compressed mode sequence has different start-up times, pattern and repetition period.At any time the GAP of compact model can not be overlapping, otherwise conflict phenomenon will occur; Simultaneously, in order to guarantee the channel transmission quality during starting compact model, also stipulated to have in continuous three frames above two frames to be accounted for by GAP.
Determined required compressed mode sequence number, just need dispose each compressed mode sequence parameter respectively according to network planning parameter.Demand according to compressed mode sequence, need the parameter of configuration to have transmission gap lengths TGL, transmission space modal length TGPL, transmission space to begin timeslot number TGSN and transmission gapping interval TGD, many compressed mode sequence if desired, also to dispose the Δ CFN parameter of every compressed mode pattern respectively with respect to the compressed mode pattern in front, and should make each bar compressed mode sequence can not produce conflict, and to guarantee in continuous three frames, can not have and surpass two frames and accounted for by GAP according to these parameter configuration.
The concrete configuration process is as follows:
Step 502: determine compressed mode transmissions gap lengths TGL and transmission space modal length TGPL according to network planning parameter.Wherein, network planning parameter comprises: alien frequencies or different system adjacent area number that needs are measured, system cell current wireless environment.
In order there to be when the different measurement demands suitable space to be used for measuring, not only made it enough but also be unlikely and cause too many waste, therefore to consider of the influence of the environment of the Target cell measured and system's current area to these parameters.
Alien frequencies of Ce Lianging or different system frequency are many if desired, then the space in the unit interval need dispose big; If the range statistics characteristic that the sub-district covers is the sub-district of fast moving, such as, be highway in the cell coverage area, require to measure fast, then the space in the unit interval disposes also greatly, so that there are enough spaces to be used for measuring.
Step 503: according to the TGL that determines and TGPL configuration TGSN (the transmission space begins timeslot number) and TGD (transmission gapping interval).
TGSN is first transmission space start timeslot number in compressed mode pattern in the compressed mode pattern, and span is 0～14slot.TGL length configuration TGSN according to configuration in the step 502.When TGSN is set, preferably make the transmission space of single frames pattern be positioned at the centre of a frame; For the transmission space of two frame patterns, preferably be positioned at the middle of two frames.So just make compact model influence minimum what single frames caused in the time.
Below several typical case are provided recommended value:
(1) during TGL=5slot, TGSN=5slot is set;
(2) during TGL=10slot, adopt two frame patterns, TGSN=10slot;
(3) during TGL=14slot, adopt two frame patterns, TGSN=8slot;
(4) if TGL=7slot, then TGSN preferably is set to 4slot or 11slot, also can be set to 0 or 7slot according to actual conditions.
Agreement regulation can have two transmission spaces at most in the compressed mode pattern, TGD represents the distances in two transmission spaces, and promptly the initial moment of the initial moment of GAP2 and GAP1 is poor, and span is 15～269slot.
According to the TGL of configuration in the step 502, if TGL smaller or equal to 14slot, uses single hole, promptly have only a transmission space in the pattern, promptly TGL1 does not then need to dispose TGD.If TGL greater than 14slot, then uses diplopore, 2 transmission space: TGL1, TGL2 are promptly arranged in the pattern, then need to dispose TGD.
It should be noted that: the value of TGD can not be provided with too for a short time, in order to avoid GAP1 and GAP2 overlap.
According to 25.133 agreements regulation, can be not overlapping for the transmission space that guarantees the compressed mode pattern sequence, must follow following principle:
(1) guarantees to have at least a frame not to be compressed in continuous three frames.
(2) guarantee that the finish time of GAP1 in continuous two condensed frames and the initial moment of GAP2 differ 8 time slots at least.
(3) preferably dispose two GAP in adjacent radio frames, promptly dispose the value of TGD, make to differ finish time of the initial moment and GAP1 of GAP2 15 time slots at least.
In order to satisfy above-mentioned condition, make TGD＞TGL1+15 (slot of unit) and satisfy following condition:
If TGL2 is the transmission space of single frames pattern then is positioned at the centre of a frame; For the transmission space of two frame patterns, preferably be positioned at the middle of two frames.
Step 504: judge whether to exist many compressed mode sequence.
If there is no, then enter step 506: configuration finishes.
If exist, then enter step 505: dispose and adjust the Δ CFN of every compact model respectively, make it satisfy the compressed mode sequence condition for validity.Wherein, Δ CFN is meant the back compressed mode pattern that starts in the compressed mode pattern sequence time deviation with respect to last the compressed mode pattern that starts, and article one compressed mode pattern does not need to dispose Δ CFN.
Because the measurement that needs when switching is a kind of incessantly, there are many compressed mode pattern in the compressed mode sequence that starts, after starting compressed mode sequence, every compressed mode pattern is according to parameters such as the length of different separately start-up times, GAP and cycles, in the time of in the radio frames that is added to, may make to occur the situation that same frame is taken by the GAP of a plurality of compressed mode pattern in the radio frames, cause that promptly GAP is overlapping.Whenever 3GPP is defined in that the GAP of compressed mode pattern can not be overlapping, otherwise owing to occurred the slit that a plurality of compressed mode pattern produce in the same radio frames, conflict phenomenon occurs.Produce the situation of conflict between the compact model as shown in Figure 3.Simultaneously, in order to guarantee the channel transmission quality during starting compressed mode sequence, 3GPP25.133 has stipulated that allowing continuous maximum slits number is two frames.As shown in Figure 6, though that 2 compressed mode pattern do not have is overlapping, continuous 3 frames having occurred the slit.
In order to prevent above-mentioned situation, just need to determine the start-up time of many compressed mode sequence, could constitute one group of complete compact model like this.In the present invention, by the inspection of compressed mode pattern validity being determined the Δ CFN of every compressed mode sequence.
Compressed mode pattern validity check flow process is as shown in Figure 8:
At first, find out the least common multiple M1 of many pattern length in step 801, consider the influence of the Δ CFN of every pattern then, with the 1st pattern is starting point, article 2, the starting point deviation of the starting point of pattern with respect to the 1st is Δ Cfn1, article 3, the starting point deviation of the starting point of pattern with respect to the 2nd is Δ Cfn2, M2=Δ Cfn1+ Δ Cfn2, and promptly M2 is the last item pattern with respect to the deviation of the 1st pattern start-up time.The length of pattern inspection is that least common multiple M1 adds M2.
Consider situation shown in Figure 6: though considered the not conflict of inspection length of the least common multiple and the Δ CFN in pattern cycle, but the occupied situation of continuous 3 frames appears after the inspection length, pattern checks that length also need add a surplus M3 (M3＞=N-1, N represents to have " slit " to have M3=N-1 under the optimal situation by the N continuous frame.Stipulate N=3 in recommending for the 3GPP agreement, promptly do not allow continuous 3 frames to have " slit " to exist, at this moment M3 can be set at 2).
Like this, pattern is checked length M=M1+M2+M3, and M1 is the least common multiple of pattern length, and M2 is the last item pattern with respect to the deviation of the 1st pattern start-up time, and M3 prevents the occupied situation of N continuous frame, M3＞=N-1.In pattern was checked the scope of length, all conflict possibilities had all been traveled through, and inspection at this moment is a fullest.
Then, according to step 802, use one-dimension array X
i(i=0 ..., M) (X wherein
iFor being designated as the member's of i value in the one-dimension array down) the expression compressed mode sequence, the following frame number that is designated as of array will be marked out by the frame that GAP takies, if this frame has GAP, then fills out 1, does not then fill out 0.
After the visual representation method above having had, check that plyability is just simple.
From 0 coordinate of array, the content of first pattern sequence is filled in into successively, till the length of regulation.And then the beginning of getting back to array fills in second and the 3rd pattern sequence, if find that in the process of filling in certain array member is 1 by twice assignment, just illustrates that GAP is overlapping, and then this compressed mode pattern is invalid,
Be step 803: whether whether the radio frames of judging stack has conflict, promptly have frame to be marked more than twice or twice.
If find that in the process of filling in certain array member is 1 by twice assignment, just illustrate that GAP is overlapping, this compressed mode pattern is invalid, at this moment, enters step 804: return failure.
Otherwise, passed through the plyability inspection of pattern, also to further check the situation that whether has the N continuous frame to be taken by GAP,
Enter step 805: check whether continuously GAP takies above two frames.
At this, can use the sliding window technology, method is as follows:
Utilize formula Y
i=X
i+ X
I+1+ ...+X
I+N(i=0 ..., M-N), (X wherein
iFor being designated as the member's of i value in the above-mentioned one-dimension array down, M checks length, N represents can not the N continuous frame to have " slit " to exist), obtain second array Y, if the value of any one the array member in the Y array is more than or equal to N, then explanation exists the N continuous frame to be taken by GAP, and this compressed mode pattern is invalid, at this moment, enter step 804: return failure.
Otherwise, configuration successful is described, enter step 806: withdraw from layoutprocedure.
In order further to understand the sliding window technology, can be with reference to Fig. 7:
In checking length 13 frames, insert after 0,1 sign as shown in Figure 7 with the radio frames of the compressed mode pattern among Fig. 61 and compressed mode pattern 2 stack gained with array representation:
The 1st frame, the 4th frame, the 5th frame, the 9th frame, the 11st frame to the 13 frames are 1, and all the other positions are 0.Sliding window at first from 0 coordinate of array, is worth addition with the array member in the window, and the 1st the member's value that obtains new data Y is 1, is not equal to 3; With moving one behind the window, the array member in the window is worth addition again, the 2nd the member's value that obtains array Y is 1, also is not equal to 3; When being added to last bit array member, last the array member value that obtains Y is 3, illustrates that existing continuous GAP to take frame number after the compressed mode pattern sequence superposes has surpassed two frames, and this routine compressed mode pattern sequence is invalid, finishes inspection and withdraws from.
In order to understand the process of above-mentioned compressed mode pattern validity check, be elaborated below with reference to two compressed mode sequence shown in Figure 6.
As shown in Figure 6, two compressed mode sequence are respectively:
Sequence 1: pattern length is 8 frames, and the 1st frame has the compression space, be expressed as 1,0,0,0,0,0,0,0}, 0 expression does not have the space, and 1 expression has the space;
Sequence 2: pattern length is 8 frames, and the 1st, 2,8 frames have the compression space, be expressed as 1,1,0,0,0,0,0,1}.
At first, determine to check length, the least common multiple M1 of 2 pattern length is 8 frames, the 2nd pattern with respect to the deviation of the 1st pattern with M2 be 3 frames, suppose not allow that the compression space appears in continuous 3 frames, then M3 equals 2 frames, all patterns inspection length M=13 frames;
Then, use one-dimension array mark compressed mode pattern sequence, this array X length is 12, and every compressed mode pattern sequence is filled in array successively, end product is { 1,0,0,1,1,0,0,0,1,0,1,1,1}, this array member be not by assignment repeatedly, illustrate that not have GAP overlapping, the plyability inspection of pattern is passed through, and enters next step inspection;
Check whether exist continuous 3 frames to be occupied by GAP, use sliding window, window size is 3, calculates array Y={1,1,2,2,1,0,1,1,2,2, there is the value more than or equal to 3 in 3} in the array, illustrate to exist continuous 3 frames to be taken by GAP that this compressed mode pattern is invalid.
When many compressed mode sequence are arranged, also need to adjust for invalid compressed mode pattern, after being adjusted, it can satisfy validity.
The multisequencing compact model is adjusted flow process as shown in Figure 9:
Step 901: need to select the compressed mode sequence of adjustment, dispose initial Δ CFN;
Supposing has 3 compressed mode pattern sequences, and the 1st does not need to dispose Δ CFN, needs the Δ CFN of other 2 compressed mode pattern sequences of configuration.Earlier the 2nd pattern sequence and the 1st pattern sequence of configuration are effective, and then adjust 2 of the 3rd and fronts effectively.During beginning, adjust the 2nd Δ CFN earlier, dispose initial Δ CFN1 and equal 1.
Step 902: carry out the compressed mode pattern validity check, the particular exam flow process as shown in Figure 5.
Step 903: judge whether current compressed mode pattern is effective;
If effectively, then enter step 905: judging whether all compressed mode pattern sequences are adjusted finishes;
Finish if adjust, then enter step 906: finish; Otherwise return step 901, the compressed mode pattern sequence of selecting remaining need to adjust disposes initial Δ CFN.
If invalid, then enter step 904: adjust Δ CFN, generally adjusting step-length is 1 frame, and promptly Δ CFN=Δ CFN+1 certainly, also can make Δ CFN=Δ CFN+2 according to actual conditions.
Then, return step 902: carry out the compressed mode pattern validity check once more.
Consider that common GSM measures, need to start three compressed mode sequence, be respectively applied for that measure GSM Carrier RSSI, initial BSIC confirm, BSIC heavily confirms, therefore, be example with these three compressed mode sequence below, describe in the inventive method layoutprocedure in detail TGL and these two parameters of TGPL.
25.133 the agreement regulation, be 480ms the measuring period of GSM Carrier RSSI, and requirement RSSI value of each carrier frequency in measuring period will be sampled 3 times at least.If UE can not finish the sampling of the GSM carrier frequency of all requirements in the 480ms a measuring period, UE is with measure GSM carrier frequency as much as possible and guarantee that each carrier frequency carries out 3 samplings at least.The carrier frequency measurement of not finishing will be finished in measuring period subsequently.This means that physical layer may be the multiple of 480ms measuring period to the cycle of RRC (Radio Resource control) layer report.
For the GSM rssi measurement requirement that can realize expecting, the length that the obtainable effective Measuring Time of UE equals GAP deducts UE and switches to the GSM frequency and allow to postpone and extra surplus from the maximum that the GSM frequency is switched back the FDD frequency from the FDD frequency.
UE is as shown in table 1 below at transmission gap lengths TGL can carry out the RSSI sampling in the time number:
Table 1:
| TGL (time slot) | The hits of GSM carrier RSSI in each |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 7 | 6 |
| 10 | 10 |
| 14 | 15 |
The scope of TGL is 1～14 time slot in the 3GPP agreement, and 25.133 agreements recommend the TGL of rssi measurement compressed mode sequence can be 3,4,5,7,10 or 14 time slots, but do not determine concrete pattern.Because each carrier frequency will carry out 3 samplings at least, therefore can not choose the pattern that TGL equals 3 or 4 time slots.
(7 time slots can be sampled 6 times in theory to measure 1 carrier frequency only when TGL equals 5 or 7 time slots, suppose each carrier frequency sampling 3 times, then can measure 2 carrier frequency at most, but owing between compression and the non-compression time slot handoff procedure is arranged, the time slot that causes reality to survey is less than 7 time slots).
If pattern length T GPL is 3 frames, promptly just can measure (48/3) * 1=16 carrier frequency in 48 frames at 480ms in measuring period so;
If TGPL is 8 frames, can measure (48/8) * 1=6 carrier frequency in measuring period at 480ms so;
If TGPL is 12 frames, can measure (48/12) * 1=4 carrier frequency in measuring period at 480ms so.
From last surface analysis can draw TGL, the TGPL of rssi measurement compressed mode pattern sequence, the pass that the measurement frequency is counted N is:
48/TGPL*F(TGL)＝3N (1)
Wherein, F (TGL) but be that the pairing frequency measurement point sampling of TGL is counted relation function, see Table 1.
From formula (1) as can be seen: can measure that frequency number and TGL are directly proportional and TGPL is inversely proportional to.
Therefore, the frequency number that just can measure as required is with regard to the value of configurable corresponding TGPL and TGL.
For the configuration that initial BSIC confirms, BSIC heavily confirms compressed mode sequence, owing to be that the BSIC decoding is carried out in the best several sub-districts of RSSI, therefore, can mainly consider cell environment, be the sub-district of moving at a slow speed for statistical property, has the more time to measure, can adopt the relatively shorter compressed mode sequence of unit interval internal pore, for statistical property is the sub-district of fast moving, requires to measure fast, requires to adopt the bigger compressed mode sequence of unit interval internal pore.Described void ratio is meant (TGL1+TGL2)/TGPL1, i.e. a ratio that transmits all interior transmission gap lengths of space modal length and this transmission space modal length.
Confirm the compact model void ratio and measure maximum time emulation graph of a relation with reference to initial BSIC shown in Figure 10:
As can be seen, void ratio and measure being inversely proportional to relation of maximum time, promptly void ratio is little, and the time that is used to measure is just few, and it is just bigger to measure required maximum time, that is to say to be used for mobile at a slow speed user.
Compact model is according to the cell configuration of different statistical properties, as: the statistical property of sub-district can be divided into according to the user velocity feature of cell coverage area: at a high speed, middling speed, low speed, certainly, also can be divided into multistage as required.
Such as dividing, 2 thresholdings are set according to measuring maximum time: high speed thresholding Tfast1, low speed thresholding Tslow1, as shown in table 2 below:
Table 2:
| Measure the maximum time scope | The cell speed characteristic | The compact model void ratio |
| ＞Tslow1 | At a slow speed | ＜Pslow1 |
| ＞Tfast1 and＜=Tslow1 | Middling speed | ＜Pfast1 and＞=Pslow1 |
| ＜＝Tfast1 | Fast | ＞＝Pfast1 |
Tfast1 and Tslow1 are configurable, for statistical property is the sub-district of fast moving, compact model void ratio＞=the Pfast1 of configuration, for statistical property is the sub-district that middling speed moves, the configuration compact model void ratio＜Pfast1 and＞=Pslow1, for statistical property is the sub-district of moving at a slow speed, the compact model void ratio＜Pslow1 of configuration.
Such as, Tfast1 can be set to 2 seconds, and Tslow1 is set to 4 seconds, can obtain from Figure 10, and Pfast1 is 1.75, and Pslow1 is 0.85.Be that the compact model void ratio that the sub-district disposed of fast moving is more than or equal to 1.75 time slots/frame promptly for statistical property, for statistical property for the compact model void ratio that the sub-district disposed that moves at a slow speed less than 0.85 time slot/frame, for statistical property be the compact model void ratio that the sub-district disposed that moves of middling speed 1.75 and 0.85 time slot/frame between.
Heavily confirm the compact model void ratio and measure maximum time emulation graph of a relation with reference to BSIC shown in Figure 11:
Equally as can be seen, void ratio and measure being inversely proportional to relation of maximum time, promptly void ratio is little, and the time that is used to measure is just few, and it is just bigger to measure maximum time, can only be used for mobile at a slow speed user.
Compact model is according to the cell configuration of different statistical properties, as: the statistical property of sub-district can be divided into according to the user velocity feature of cell coverage area: at a high speed, middling speed, low speed, certainly be divided into multistage as required.
Such as, divide according to measuring maximum time, 2 thresholdings are set: high speed thresholding Tfast2, low speed thresholding Tslow2, as shown in table 3 below:
Table 3:
| Measure the maximum time scope | The cell speed characteristic | The compact model void ratio |
| ＞Tslow2 | At a slow speed | ＜Pslow2 |
| ＞Tfast2 and＜=Tslow2 | Middling speed | ＜Pfast2 and＞=Pslow2 |
| ＜＝Tfast2 | Fast | ＞＝Pfast2 |
Tfast2 and Tslow2 are configurable, for statistical property is the sub-district of fast moving, compact model void ratio＞=the Pfast2 of configuration, for statistical property is the sub-district that middling speed moves, the configuration compact model void ratio＜Pfast2 and＞=Pslow2, for statistical property is the sub-district of moving at a slow speed, the compact model void ratio＜Pslow2 of configuration.
Such as, Tfast2 can be set to 2 seconds, and Tslow2 is set to 5 seconds, can obtain from Figure 10, and Pfast2 is 0.71, and Pslow2 is 1.4.Be that the compact model void ratio that the sub-district disposed of fast moving is more than or equal to 1.4 time slots/frame promptly for statistical property, for statistical property for the compact model void ratio that the sub-district disposed that moves at a slow speed less than 0.71 time slot/frame, for statistical property be the compact model void ratio that the sub-district disposed that moves of middling speed 1.4 and 0.71 time slot/frame between.
Be described further below by the layoutprocedure of concrete application example above-mentioned TGL and TGPL:
Suppose need to start GSM and measure, the GSM adjacent area of current area has 16, and the statistical property of sub-district is the middling speed mobile cell, uses three compressed mode pattern, is respectively applied for measure GSM Carrier RSSI, initial BSIC affirmation, BSIC and heavily confirms.
At first compressed mode pattern TGL1 and the TGPL1 of allocating and measuring GSM Carrier RSSI:
According to formula (1), draw TGPL1=F (TGL1), though the area covered by agreement of TGPL1 is 1～144 frame,, select TGPL1 to equal 15 frames according to table 1, TGL1 equals 14slots (time slot) so.
The compressed mode pattern TGL2 and the TGPL2 that confirm of the initial BSIC of allocating and measuring then:
For the situation of using many compressed mode sequence, the TGPL of every compressed mode pattern is equated, can simplify the configuration in later stage like this.For this example, the statistical property of sub-district is the middling speed mobile cell, the compact model void ratio of configuration 1.75 and 0.85 time slot/frame between.Can get and measure maximum time is median 3 seconds, according to Figure 10, the compact model void ratio that obtains disposing equals 0.96 time slot/frame, measure the TGL2=0.96TGPL2 of the compressed mode pattern of initial BSIC affirmation so, the TGPL2=15 frame, TGL2=0.96*15=14.4 then, the scope of TGL is 3,4,5,7,10 or 14 time slots that agreement is recommended, it is 14 time slots that TGL2 rounds.
Compressed mode pattern TGL3 and TGPL3 that last allocating and measuring BSIC heavily confirms:
For this example, the statistical property of sub-district is the middling speed mobile cell, for statistical property be the compact model void ratio that the sub-district disposed that moves of middling speed 1.4 and 0.71 time slot/frame between, can get and measure maximum time is that intermediate value is 3.5 seconds, according to Figure 11, the compact model void ratio that obtains disposing equals 0.85 time slot/frame, measure the TGL3=0.85TGPL3 of the compressed mode pattern of initial BSIC affirmation so, TGPL3 preferentially is taken as 15 frames, TGL3=0.85*15=12.75 so, the scope of TGL is 3 of agreement recommendation, 4,5,7,10, or 14 time slots, it is 14 time slots that TGL3 rounds.
Certainly the present invention is not limited to the configuration of above-mentioned these three compressed mode sequence parameters, and layoutprocedure and said process when needing many compressed mode sequence are similar, do not repeat them here.
For the TGL and the TGPL of above-mentioned application example configuration, obtain the TGPL1=15 of three compressed mode pattern, TGL1=14, TGPL2=15, TGL2=14, TGPL3=15, TGL3=14, so according to the equipping rules in the step 503, TGSN1, TGSN2 and TGSN3 can be configured to 8slot.
If TGL smaller or equal to 14slot, uses single hole, promptly having only a transmission space in the pattern is TGL1, does not then need to dispose TGD.If TGL greater than 14slot, then uses diplopore, 2 transmission space: TGL1, TGL2 are promptly arranged in the pattern, then need to dispose TGD.
When many compressed mode sequence of needs, dispose and adjust the Δ CFN of every compressed mode sequence correspondence, make full sequence effective.Like this, RNC (radio network controller) just can send to base station and UE by signaling message with these compressed-mode parameters that disposes in real time, make it utilize these compressed mode sequence to finish different-frequency measure or isosystem measurement, and switch in the suitable Target cell according to measurement result.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (9)
1, a kind of code division multiple access system compressed-mode parameter collocation method is characterized in that described method comprises:
When described system need start compact model, determine required compressed mode sequence number;
Be respectively each compressed mode sequence configuration parameter according to network planning parameter, described network planning parameter comprises the adjacent area number of current alien frequencies in sub-district or different system, the user velocity feature of cell coverage area.
2, method according to claim 1 is characterized in that, the described step that is respectively each compressed mode sequence configuration parameter according to network planning parameter comprises:
Determine the transmission gap lengths and the transmission space modal length of compressed mode pattern according to described network planning parameter;
Begin timeslot number and transmission gapping interval according to described definite transmission gap lengths and modal length configuration transmission space, transmission space;
When many compressed mode sequence of needs, dispose and adjust every compressed mode sequence respectively with respect to the offset CFN in the initial moment of compressed mode sequence of configuration before it, make it satisfy the compressed mode sequence condition for validity.
3, method according to claim 2 is characterized in that, determines that according to the network planning parameter transmission gap lengths of compressed mode sequence and the step of transmission space modal length comprise:
Described transmission gap lengths is directly proportional with described alien frequencies or different system adjacent area number, and is directly proportional with the translational speed of described system cell;
Described transmission space modal length and described alien frequencies or different system adjacent area number are inversely proportional to, and are inversely proportional to the translational speed of described system cell.
4, method according to claim 2 is characterized in that, disposes and adjusts every compressed mode sequence respectively and comprise with respect to the step of the offset CFN in the initial moment of compressed mode sequence of configuration before it:
Select the compressed mode sequence of configuration respectively, dispose its initial Δ CFN,
Check the validity of the compressed mode sequence of described correspondence according to described initial Δ CFN;
Adjust described initial Δ CFN according to check result.
5, method according to claim 4 is characterized in that, checks that according to described initial Δ CFN the step of validity of the compressed mode sequence of described correspondence comprises:
Determine the inspection length M=M1+M2+M3 of described compressed mode sequence, wherein,
M1 is the least common multiple of all compressed mode sequence length,
M2 be the configuration the last item compressed mode sequence with respect to the 1st compressed mode sequence deviation,
M3 checks the length surplus, and M3 〉=N-1, N represent and can not have the slit by the N continuous frame;
In described inspection length to the inspection that conflicts of described compressed mode sequence;
In described inspection length, described compressed mode sequence is carried out continuous slit and take the frame number inspection;
When described compressed mode sequence does not have the slit to take conflict and continuously to take frame number maximum continuously when the slit takies frame number less than what allow in the slit, this compressed mode sequence is effective.
6, method according to claim 4 is characterized in that, the step of adjusting described initial Δ CFN according to check result is specially:
When described compressed mode sequence need to select the compressed mode sequence adjusted invalid, make its initial Δ CFN increase a predetermined step-length.
7, method according to claim 6 is characterized in that, described predetermined step-length is 1 frame.
8, method according to claim 1 is characterized in that, determines that the step of required compressed mode sequence number comprises:
When the Target cell of described direct-cut operation is alien-frequency district, need a compressed mode sequence;
When the Target cell of described direct-cut operation is different system cell, need many compressed mode sequence.
9, method according to claim 1 is characterized in that, described method also comprises:
When the transmission space of described compressed mode sequence was the single frames pattern, described transmission space was positioned at the centre of this frame;
When the transmission space of described compressed mode sequence was two frame pattern, described transmission space was positioned at the centre of this two frame.
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| CN1357984A (en) * | 2000-12-05 | 2002-07-10 | 华为技术有限公司 | Compresision mode control method of CDMA system |
| CN1525676A (en) * | 2003-09-17 | 2004-09-01 | 中兴通讯股份有限公司 | A compress mode measurement parameter configuration method |
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| EP1137203A2 (en) * | 2000-02-18 | 2001-09-26 | Nokia Mobile Phones Ltd. | Reducing interference in inter-frequency measurement |
| CN1357984A (en) * | 2000-12-05 | 2002-07-10 | 华为技术有限公司 | Compresision mode control method of CDMA system |
| CN1525676A (en) * | 2003-09-17 | 2004-09-01 | 中兴通讯股份有限公司 | A compress mode measurement parameter configuration method |
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