CN103313401A - Method and device for adjusting PDCCH (Physical Downlink Control Channel) format - Google Patents
Method and device for adjusting PDCCH (Physical Downlink Control Channel) format Download PDFInfo
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- CN103313401A CN103313401A CN2012100672796A CN201210067279A CN103313401A CN 103313401 A CN103313401 A CN 103313401A CN 2012100672796 A CN2012100672796 A CN 2012100672796A CN 201210067279 A CN201210067279 A CN 201210067279A CN 103313401 A CN103313401 A CN 103313401A
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Abstract
The embodiment of the invention provides a method and a device for adjusting a PDCCH (Physical Downlink Control Channel) format. The method comprises the following steps: obtaining a serving cell of UE (User Equipment) and signal quality measurement values of a plurality of adjacent regions of the serving cell, and determining the signal quality measurement value of the strongest adjacent region of the plurality of adjacent regions; calculating a difference value of a signal quality measurement value of the serving cell and the signal quality measurement value of the strongest adjacent region and determining the interference strength of interferences of the strongest adjacent region to the serving cell according to the difference value; judging whether the current PDCCH format is adapted to the interference strength or not; if not, determining the quantity of CCE (Communication Control Equipment) of a control channel occupied by the PDCCH format adapted to the interference strength; adjusting the PDCCH format according to the quantity of the CCE. According to the method and the device disclosed by the invention, the PDCCH format used by the UE can be automatically adjusted according to the interfered condition of the UE, and the UE can accurately obtain a PDCCH resource used by transmission of upstream and downstream data. Furthermore, the transmission delay of the UE can also be reduced, and the throughput capacity of the system is improved.
Description
Technical field
The present invention relates to communication technical field, be specifically related to a kind of method and device of the PDCCH of adjustment form.
Background technology
UE (User Equipment, subscriber equipment) when carrying out data traffic transmission, need by blind check PDCCH (physical downlink control channel in control area (comprising the exclusive search volume of common search space and subscriber equipment), Physical Downlink Control Channel) Chuan Shu DCI (Downlink Control Information, Downlink Control Information), determine UE up-downgoing schedule information, namely UE carries out the shared PDCCH resource of up-downgoing transfer of data.
The DCI information that blind check obtains is that the base station is sent to UE by L continuous CCE, the value of L can be 1,2,4,8 four kind, a kind of value of L is with regard to corresponding a kind of PDCCH form, that is to say that the PDCCH form refers to the CCE number that the base station takies when UE sends the up-downgoing schedule information by the PDCCH channel.Need to prove that the CCE number that the PDCCH form takies is more many, antijamming capability is just more strong, and the possibility that the up-downgoing schedule information is correctly obtained in the UE blind check is just more big.
In the prior art, the base station is UE configuration PDCCH form by static mode, and so-called static configuration refers to that the base station receives the indication information of peripheral operation personnel input, and disposes identical PDCCH form according to operating personnel's all UE of residential quarter that are designated as.
The method of this static configuration PDCCH form is not just considered the characteristic of channel of wireless network, in actual applications, the characteristic of channel of wireless network is relevant with the position of residential quarter, UE place, and UE position difference, cause its interference level that is subjected to also different again, therefore, be in the different antijamming capability of DCI transmission needs of the UE on the diverse location.The method of artificial static configuration PDCCH form just can not adapt to the characteristic of channel that the mobile subscriber changes in the prior art, may cause UE can't correctly obtain the PDCCH resource that its up-downgoing transfer of data takies, also increased the transmission delay of user terminal, reduce the throughput of system, even occurred the call drop phenomenon in severe case.
Summary of the invention
The embodiment of the invention provides a kind of method and device of the PDCCH of adjustment form, so that UE correctly obtains the PDCCH resource that its up-downgoing transmission takies, reaches the transmission delay that reduces user terminal, improves the purpose of throughput of system.
For this reason, the embodiment of the invention provides following technical scheme:
A kind of method of adjusting the PDCCH form, described method comprises:
Obtain a plurality of signal quality of adjacent cells measured values of the affiliated Serving cell of user terminal and described Serving cell, and determine the strongest signal quality of adjacent cells measured value in a plurality of adjacent areas;
The signal quality measured values of calculation services residential quarter and the difference of the strongest signal quality of adjacent cells measured value are determined the interference strength that described Serving cell is disturbed by the strongest adjacent area according to this difference;
Judge whether current PDCCH form adapts with described interference strength, if not, then determine the shared control channel CCE number of PDCCH form that adapts with described interference strength; Adjust the PDCCH form according to described CCE number.
Preferably, describedly determine that according to this difference the interference strength that described Serving cell is disturbed by the strongest adjacent area specifically comprises:
More described difference and predetermined threshold value are strong jamming if described difference, is then judged described interference strength greater than described predetermined threshold value;
Describedly judge whether current PDCCH form adapts with described interference strength and specifically comprise:
Judge to use the user terminal of described current PDCCH form whether to be interference user, to disturb the user if described user terminal is incompetent, then to judge described current PDCCH form and described interference strength incompatibility.
Preferably, describedly determine that according to this difference the interference strength that described Serving cell is disturbed by the strongest adjacent area specifically comprises:
More described difference and predetermined threshold value are that incompetent is disturbed if described difference, is then judged described interference strength less than described predetermined threshold value;
Describedly judge whether current PDCCH form adapts with described interference strength and specifically comprise:
Judge to use the user terminal of described current PDCCH form whether to be interference user, if described user terminal is interference user, then to judge described current PDCCH form and described interference strength incompatibility.
Preferably, the judgment mode of described interference user is specially:
Obtain the current PDCCH form that described user terminal uses, and compare with default PDCCH form, if the CCE number that described current PDCCH form takies, judges then that described user terminal is interference user greater than the CCE number that described default PDCCH form takies; Otherwise judge that described user terminal is that incompetent is disturbed the user.
Preferably, the shared control channel CCE number of described PDCCH form definite and that described interference strength adapts specifically comprises:
Calculate CCE number N according to following formula,
Wherein: PDCCH
1Expression polymerization grade is the RE number that 1 PDCCH form takies; DIC
BitExpression adopts specific DIC form to take bit number; CRC
BitThe bit number that expression adopts CRC check to increase; R
EncodeThe code efficiency of the encoding scheme that expression is adopted; I
cExpression interference user efficiency of transmission is disturbed the transmission coefficient of user's efficiency of transmission with respect to incompetent.
Preferably, before the shared control channel CCE number of described PDCCH form definite and that described interference strength adapts, described method also comprises:
Obtain the code efficiency of the encoding scheme of current employing;
It is long that the sliding window window is set, calculate described window long in the MISS of packet lead, MISS leads=MISS number/window is long; If described MISS leads less than first threshold, then increase the code efficiency of described current employing; If described MISS leads greater than second threshold value, then reduce the code efficiency of described current employing.
Preferably, described signal quality comprises signal power and/or Signal to Interference plus Noise Ratio.
A kind of device of adjusting the PDCCH form, described device comprises:
The signal quality acquiring unit is used for obtaining a plurality of signal quality of adjacent cells measured values of the affiliated Serving cell of user terminal and described Serving cell, and determines the strongest signal quality of adjacent cells measured value in a plurality of adjacent areas;
The interference strength determining unit is used for the difference of signal quality measured values with the strongest signal quality of adjacent cells measured value of calculation services residential quarter, determines the interference strength that described Serving cell is disturbed by the strongest adjacent area according to this difference;
Adjustment unit is used for judging whether current PDCCH form adapts with described interference strength, if not, then determines the shared control channel CCE number of PDCCH form that adapts with described interference strength; Adjust the PDCCH form according to described CCE number.
Preferably, described interference strength determining unit specifically comprises:
Difference computational unit is used for the difference of signal quality measured values with the strongest signal quality of adjacent cells measured value of calculation services residential quarter;
Interference strength is determined subelement, being used for more described difference and predetermined threshold value, is strong jamming if described difference, is then judged described interference strength greater than described predetermined threshold value, if it is that incompetent is disturbed that described difference, is then judged described interference strength less than described predetermined threshold value.
Preferably, described adjustment unit specifically comprises:
The interference user judging unit is used for judging to use the user terminal of described current PDCCH form whether to be interference user;
Judging unit, being used in described interference strength is strong jamming and described user when disturbing the user for incompetent, perhaps, is that incompetent is disturbed and described user during for interference user in described interference strength, judges described current PDCCH form and described interference strength incompatibility;
Adjust subelement, be used for the indication according to described judging unit, the shared control channel CCE number of PDCCH form definite and that described interference strength adapts is adjusted the PDCCH form according to described CCE number.
Preferably, described interference user judging unit specifically comprises:
The PDCCH format acquisition unit is used for obtaining the current PDCCH form that described user terminal uses;
PDCCH form comparing unit, be used for more described current PDCCH form and default PDCCH form, if the CCE number that described current PDCCH form takies, judges then that described user terminal is interference user greater than the CCE number that described default PDCCH form takies; Otherwise judge that described user terminal is that incompetent is disturbed the user.
Preferably, described adjustment subelement is specifically determined the CCE number according to following formula:
Wherein: PDCCH
1Expression polymerization grade is the RE number that 1 PDCCH form takies; DIC
BitExpression adopts specific DIC form to take bit number; CRC
BitThe bit number that expression adopts CRC check to increase; R
EncodeThe code efficiency of the encoding scheme that expression is adopted; I
cExpression interference user efficiency of transmission is disturbed the transmission coefficient of user's efficiency of transmission with respect to incompetent.
Preferably, described adjustment unit also comprises:
The code efficiency acquiring unit is for the code efficiency of the encoding scheme of obtaining current employing;
MISS leads computing unit, and it is long to be used for that the sliding window window is set, and the MISS that calculates the long interior packet of described window leads, and MISS leads=and MISS number/window is long;
The code efficiency adjustment unit is used for increasing the code efficiency of described current employing when described MISS leads less than first threshold; When described MISS leads greater than second threshold value, reduce the code efficiency of described current employing.
Method and the device of the adjustment PDCCH form of the embodiment of the invention, the disturbed condition that is subjected to according to user terminal, automatically adjust the PDCCH form that uses when user terminal carries out the up-downgoing scheduling of resource, thereby guarantee correct the obtaining it and carry out the PDCCH resource that the up-downgoing transfer of data takies of user terminal.In addition, the embodiment of the invention can also reduce the transmission delay of user terminal by adaptive adjustment PDCCH form, improves throughput of system.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the application, for those of ordinary skills, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart that the embodiment of the invention is adjusted the method for PDCCH form;
Fig. 2 is the structural representation that the embodiment of the invention is adjusted the device of PDCCH form;
Fig. 3 is the structural representation of interference strength determining unit in the embodiment of the invention;
Fig. 4 is the structural representation of a kind of implementation of adjustment unit in the embodiment of the invention;
Fig. 5 is the structural representation of interference user judging unit in the embodiment of the invention;
Fig. 6 is the structural representation of the another kind of implementation of adjustment unit in the embodiment of the invention.
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with drawings and embodiments the embodiment of the invention is described in further detail.
Method and the device of the adjustment PDCCH form of the embodiment of the invention, measure by the signal quality to user terminal, obtain the disturbed condition of the current residential quarter of living in of user terminal and neighbor cell, and according to the difference of interference level, dispose different PDCC forms, namely according to interference level the CCE number that the PDCCH resource divides timing to use is set, the mode of adjusting the PDCCH form by this self adaptation guarantee user terminal correct obtain its up-downgoing schedule information.Meanwhile, can also reduce the transmission delay of user terminal, improve throughput of system.
As shown in Figure 1, be the flow chart that the embodiment of the invention is adjusted the method for PDCCH form, comprising:
Step 101 is obtained a plurality of signal quality of adjacent cells measured values of the affiliated Serving cell of user terminal and described Serving cell, and determines the strongest signal quality of adjacent cells measured value in a plurality of adjacent areas.
The PDCCH form that uses by the static mode configuration UE in the prior art, yet because the interference level difference that UE present position difference will cause it to be subjected to, therefore, the DCI transmission that is in the UE on the diverse location just needs different antijamming capabilities, but the configuration mode of PDCCH but can not satisfy above-mentioned requirements in the prior art.Therefore, the embodiment of the invention is by monitoring UE, obtain the signal quality measured values of the current affiliated subdistrict of UE and a plurality of neighbor cells, and from a plurality of neighbor cells, determine an adjacent area the strongest, judge this strongest adjacent area to the influence of Serving cell under the UE, with this foundation as the PDCCH form of configuration UE use.
Need to prove that the signal quality described in the embodiment of the invention can be presented as Reference Signal Received Power RSRP (Reference Signal Receiving Power) or Reference Signal Received Quality RSRQ (Reference Signal Receiving Quality).Particularly, the base station can obtain the signal quality measured values of Serving cell and neighbor cell in the following manner in this step.
At first, the base station is to the signal of UE transmission constant power, with the reference value of this constant power as judgement Serving cell and neighbor cell signal quality.
Secondly, UE receives after the constant power signal that the base station sends, measure its current under the RSRP performance number of Serving cell and neighbor cell, and performance number be converted to protocol value be sent to the base station.Perhaps,
UE receives after the constant power signal that the base station sends, measures and the RSRQ value of calculation services residential quarter and neighbor cell, i.e. and the ratio of useful signal and resultant signal (useful signal+interference signal), and this ratio is sent to the base station.
At last, the base station receives RSRP value or the RSRQ value of UE feedback, and determines a residential quarter that interference signal is the strongest as the strongest adjacent area from a plurality of neighbor cells, and this just provides technical foundation for the PDCCH form of follow-up adjustment UE.
Step 102, the signal quality measured values of calculation services residential quarter and the difference of the strongest signal quality of adjacent cells measured value are determined the interference strength that described Serving cell is disturbed by the strongest adjacent area according to this difference.
Determine via step 101 Serving cell is disturbed after the strongest maximum adjacent area, need also to judge that Serving cell is subjected to the interference strength of strong adjacent area, to determine whether necessity of the PDCCH form that adjustment UE uses, specifically can be presented as: compare Serving cell and the difference of the strongest signal quality of adjacent cells measured value and the relation of predetermined threshold value, if difference is identical with predetermined threshold value, even then explanation is under the interference of the strongest adjacent area, UE also can utilize the PDCCH correct format of current configuration to obtain its uplink-downlink configuration information, namely obtain UE and carry out the PDCCH resource that the up-downgoing transfer of data is used, therefore just do not need to adjust the PDCCH form of UE in this case.And for the situation that needs are adjusted the PDCCH form, can show as again:
(1) described difference is greater than predetermined threshold value, then judges to be subjected to by Serving cell the interference strength of strong adjacent area is strong jamming.
(2) described difference is less than predetermined threshold value, then judges to be subjected to by Serving cell the interference strength of strong adjacent area is that incompetent is disturbed.
Step 103 judges whether current PDCCH form adapts with described interference strength, if not, then determines the shared control channel CCE number of PDCCH form that adapts with described interference strength; Adjust the PDCCH form according to described CCE number.
After determining that good Serving cell is subjected to the interference strength of the strongest adjacent area, need also further to judge whether the current PDCCH form that UE uses adapts with the interference strength of determining, if current PDCCH form adapts with the interference strength of determining, then necessity of PDCCH form is not adjusted in explanation, only when current PDCCH form and the interference strength of determining are incompatible, just need to adjust the PDCCH form that UE uses.Below current PDCCH form and the unconformable situation of interference strength are carried out simple declaration:
Disturb the user if use the user terminal of current PDCCH form as incompetent, and the interference strength of judging in the step 102 is strong jamming, current PDCCH form and interference strength incompatibility then are described, need carry out the adjustment of PDCCH form, particularly, be UE to be disturbed the user from incompetent convert interference user to.
If use the user terminal of current PDCCH form to be interference user, and the interference strength of judging in the step 102 is that incompetent is disturbed, current PDCCH form and interference strength incompatibility then are described, need carry out the adjustment of PDCCH form, particularly, be to convert UE to incompetent from interference user to disturb the user.
So-called interference user refers to, for avoiding interference the influence that signal obtains the up-downgoing schedule information to terminal, and the user who disposes high CCE polymerization grade.Judgement that interference user and incompetent are disturbed the user can be realized by following manner in the base station:
Obtain the current PDCCH form that user terminal uses, and with default PDCCH form relatively, if the CCE number that the CCE number that described current PDCCH form takies takies greater than described default PDCCH form, the CCE polymerization grade that is current PDCCH form is higher than the CCE polymerization grade of presetting the PDCCH form, judges that then described user terminal is interference user; Otherwise judge that described user terminal is that incompetent is disturbed the user.
Need to prove that CCE polymerization grade can comprise 1,2,4,8 totally four kinds, correspondingly, also just has four kinds of PDCCH forms, that is to say that the CCE number that the PDCCH form takies can be 1,2,4 or 8.And generally speaking, the suffered interference of UE is more little, and its characteristic of channel is just more good, then needs the CCE number that takies also just more few.
Being subjected to for Serving cell, the interference strength of strong adjacent area is strong jamming, and UE is the situation that incompetent is disturbed the user, the mode of the CCE number that embodiment of the invention employing increase PDCCH form takies, UE is disturbed the user from incompetent convert interference user to, thereby be implemented under the bigger situation of external interference, correctly obtain the purpose that UE carries out the PDCCH resource of up-downgoing transfer of data use.
Being subjected to for Serving cell, the interference strength of strong adjacent area is that incompetent is disturbed, and UE is the situation of interference user, the mode of the CCE number that embodiment of the invention employing minimizing PDCCH form takies, convert UE to incompetent from interference user and disturb the user, thereby guaranteeing that UE correctly obtains under the prerequisite of the PDCCH resource that the up-downgoing transfer of data uses, can also farthest rationally utilize the available PDCCH resource of residential quarter, be unlikely to cause the waste of PDCCH resource.
As a kind of implementation of the shared control channel CCE number of the PDCCH form of determining in the embodiment of the invention to adapt with interference strength, concrete formula is as follows:
Wherein: PDCCH
1Expression polymerization grade is the RE number that 1 PDCCH form takies; DIC
BitExpression adopts specific DIC form to take bit number; CRC
BitThe bit number that expression adopts CRC check to increase; R
EncodeThe code efficiency of the encoding scheme that expression is adopted; I
cExpression interference user efficiency of transmission is disturbed the transmission coefficient of user's efficiency of transmission with respect to incompetent.
In the above-mentioned formula (1), molecular moiety is represented the RE number of these transmission needs, and denominator represents that partly the polymerization grade is 1 PDCCH
1The RE number that form is assigned with, result of calculation N is the CCE number of representative PDCCH form, i.e. in 1,2,4 or 8.
Need to prove the DIC in the formula (1)
Bit, CRC
Bit, PDCCH
1Be fixed numbers, therefore can pass through I
cAnd/or R
EncodeAdjust the PDCCH form.
For adjusting I
cMode, be converted to interference user if UE is disturbed the user from incompetent, then I
c=1/2; If do not need to adjust PDCCH form, then I
c=1; If being converted to incompetent, interference user disturbs the user, then I
c=2.
For adjusting R
EncodeMode, detailed process is as follows:
At first, the base station obtains the code efficiency of the encoding scheme of current employing.
Secondly, it is long according to concrete wireless environment one sliding window window to be set by the base station.The situation fast for variations, that coverage radius of cell is little, the base station can be a little with the long weak point that arranges of window, and for the channel quality slow fading, coverage radius of cell is big, and the situation that timing statistics is long, the base station can be suitably a little with the long length that arranges of the window of sliding window.For example, window length can be set to 32,64,128,256,514 or 1,024 six kinds of length.
Then, the MISS number of packet in the window that base station statistics arranges is long, and calculate MISS according to statistics and lead, MISS leads=and MISS number/window is long.After terminal sent packet, correct if terminal receives packet and packet that the base station sends, then terminal was returned ACK to the base station in the base station; If it is incorrect that terminal receives data and the packet of base station transmission, then terminal is returned NACK to the base station; If terminal does not receive the packet that the base station sends, then do not send any feedback information to the base station, the base station will be a MISS with this situation statistics.
At last, the size that leads according to MISS of base station is to code efficiency R
EncodeAdjust.Particularly, a threshold k can be preset in the base station
1If base station statistics and the MISS that calculates lead less than K
1, then increase the code efficiency of current employing, thereby reduce the CCE number that the PDCCH form takies, interference user is converted to incompetent disturbs the user; If MISS leads greater than K
1, then reduce the code efficiency of current employing, thereby increase the CCE number, incompetent is disturbed the user be converted to interference user.In addition, in order to increase the flexibility that code efficiency is adjusted, two threshold k also can be preset in the base station
2And K
3If base station statistics and the MISS that calculates lead less than K
2, then increase the code efficiency of current employing, if MISS leads greater than K
3, then reduce the code efficiency of current employing, lead for MISS and be in [K
2, K
3] situation, uncomfortable reorganization code efficiency then.Adjusting range for code efficiency can obtain by emulation, and the present invention does not do restriction to this.
Certainly, I also can be taken all factors into consideration in the base station
cAnd R
EncodeRealize adjusting automatically the purpose of PDCCH form.
Need to prove, no matter which kind of mode the base station adopts adjust the PDCCH form, all may need transfer process more than once.For example, adopting I
cWhen mode was adjusted the PDCCH form, the CCE polymerization grade of the PDCCH form of the current use of UE was 1, and namely PDCCH takies 1 CCE, and the CCE polymerization grade of default PDCCH form is 4, therefore, converts to the process of interference user in that UE is disturbed the user from incompetent, utilize formula (1), set I
c=1/2, after once changing, be 2 with the current PDCCH format conversion of using of UE as CCE polymerization grade, and then compare with default PDCCH form, UE still belongs to incompetent and disturbs the user, and therefore, the conversion second time need be carried out to UE in the base station, and the PDCCH format conversion is that CCE polymerization grade is 4 situation the most at last, even is that CCE polymerization grade is 8 situation through changing for the third time the PDCCH format conversion.
Correspondingly, the embodiment of the invention also provides a kind of device of the PDCCH of adjustment form, and as shown in Figure 2, described device comprises:
Signal quality acquiring unit 201 is used for obtaining a plurality of signal quality of adjacent cells measured values of the affiliated Serving cell of user terminal and described Serving cell, and determines the strongest signal quality of adjacent cells measured value in a plurality of adjacent areas;
Interference strength determining unit 202 is used for the difference of signal quality measured values with the strongest signal quality of adjacent cells measured value of calculation services residential quarter, determines the interference strength that described Serving cell is disturbed by the strongest adjacent area according to this difference;
The embodiment of the invention is by obtaining the signal quality of the current affiliated subdistrict of UE and a plurality of neighbor cells, the suffered disturbed condition of monitoring UE, from a plurality of neighbor cells, determine an adjacent area the strongest then, judge whether this strongest adjacent area can influence UE to the influence of Serving cell and correctly obtain its up-downgoing schedule information.If Serving cell is subjected to interference strength and the current PDCCH form incompatibility of strong adjacent area, then the strongest adjacent area of explanation may cause terminal can't correctly obtain the up-downgoing schedule information to the interference of Serving cell, therefore, need redefine the CCE number that the PDCCH form that adapts with interference strength takies according to the suffered disturbed condition of terminal, realize adjusting automatically the purpose of PDCCH form.
Preferably, as shown in Figure 3, described interference strength determining unit specifically comprises:
Difference computational unit 301 is used for the difference of signal quality measured values with the strongest signal quality of adjacent cells measured value of calculation services residential quarter.
Interference strength is determined subelement 302, being used for more described difference and predetermined threshold value, is strong jamming if described difference, is then judged described interference strength greater than described predetermined threshold value, if it is that incompetent is disturbed that described difference, is then judged described interference strength less than described predetermined threshold value.
The embodiment of the invention is by comparing difference and the predetermined threshold value of Serving cell and the strongest signal quality of adjacent cells measured value, determine that Serving cell is subjected to the annoyance level of strong adjacent area, and with this annoyance level as a follow-up basis for estimation that determines whether to adjust the PDCCH form: for the situation of difference greater than predetermined threshold value, judge to be subjected to by Serving cell the interference strength of strong adjacent area is strong jamming; For the situation of difference less than predetermined threshold value, judge that interference strength is that incompetent is disturbed.
Preferably, as shown in Figure 4, the structural representation for a kind of implementation of adjustment unit specifically comprises:
Interference user judging unit 401 is used for judging to use the user terminal of described current PDCCH form whether to be interference user.
Can be understood as for the interference user in this step, for avoiding interference the influence that signal obtains the up-downgoing schedule information to terminal, and the user who disposes high CCE polymerization grade.As shown in Figure 5, the interference user judging unit can specifically comprise:
PDCCH format acquisition unit 501 is used for obtaining the current PDCCH form that described user terminal uses.
PDCCH form comparing unit 502, be used for more described current PDCCH form and default PDCCH form, if the CCE number that described current PDCCH form takies, judges then that described user terminal is interference user greater than the CCE number that described default PDCCH form takies; Otherwise judge that described user terminal is that incompetent is disturbed the user.
The CCE number that present embodiment takies by more current PDCCH form and default PDCCH form, determine whether UE is interference user, and whether be interference user as follow-up another basis for estimation that determines whether to adjust the PDCCH form with UE: the situation of the CCE number that the CCE number that takies for current PDCCH form takies greater than the PDCCH form, judgement UE is interference user; Otherwise, judge that UE is that incompetent is disturbed the user.
Judging unit 402, being used in described interference strength is that strong jamming and described user are when disturbing the user for incompetent, perhaps, described interference strength be incompetent disturb and described user when the interference user, judge described current PDCCH form and described interference strength incompatibility.
Adjust subelement 403, be used for the indication according to described judging unit, the shared control channel CCE number of PDCCH form definite and that described interference strength adapts is adjusted the PDCCH form according to described CCE number.
The embodiment of the invention is subjected in conjunction with Serving cell, and whether interference strength and the UE of strong adjacent area are two bases for estimation of interference user, determine whether to adjust the PDCCH form: be strong jamming for interference strength, and UE is the situation that incompetent is disturbed the user, the mode of the CCE number that embodiment of the invention employing increase PDCCH form takies, UE is disturbed the user from incompetent convert interference user to, thereby be implemented under the bigger situation of external interference, correctly obtain the purpose that UE carries out the PDCCH resource of up-downgoing transfer of data use.Be that incompetent is disturbed for interference strength, and UE is the situation of interference user, the mode of the CCE number that embodiment of the invention employing minimizing PDCCH form takies, convert UE to incompetent from interference user and disturb the user, thereby guaranteeing that UE correctly obtains under the prerequisite of the PDCCH resource that the up-downgoing transfer of data uses, can also farthest rationally utilize the available PDCCH resource of residential quarter, be unlikely to cause the waste of PDCCH resource.
Preferably, described adjustment subelement is specifically determined the CCE number according to following formula:
Wherein: PDCCH
1Expression polymerization grade is the RE number that 1 PDCCH form takies; DIC
BitExpression adopts specific DIC form to take bit number; CRC
BitThe bit number that expression adopts CRC check to increase; R
EncodeThe code efficiency of the encoding scheme that expression is adopted; I
cExpression interference user efficiency of transmission is disturbed the transmission coefficient of user's efficiency of transmission with respect to incompetent.
Need to prove the DIC in the above-mentioned formula
Bit, CRC
Bit, PDCCH
1Be fixed numbers, therefore can pass through I
cAnd/or R
EncodeAdjust the PDCCH form.For adjusting I
cMode, be converted to interference user if UE is disturbed the user from incompetent, then I
c=1/2; If do not need to adjust PDCCH form, then I
c=1; If being converted to incompetent, interference user disturbs the user, then I
c=2.
For adjusting R
EncodeMode, as shown in Figure 6, the above adjustment unit also comprises on the basis of implementation shown in Figure 4:
Code efficiency acquiring unit 601 is for the code efficiency of the encoding scheme of obtaining current employing.
MISS leads computing unit 602, and it is long to be used for that the sliding window window is set, and the MISS that calculates the long interior packet of described window leads, and MISS leads=and MISS number/window is long.
Code efficiency adjustment unit 603 is used for increasing the code efficiency of described current employing when described MISS leads less than first threshold; When described MISS leads greater than second threshold value, reduce the code efficiency of described current employing.
Need to prove that herein the code efficiency adjustment unit also can lead MISS and a threshold k
1Compare, namely lead at MISS＜K
1The time, increase the code efficiency of current employing, thereby reduce the CCE number that the PDCCH form takies, interference user is converted to incompetent disturbs the user; If MISS leads＞K
1, then reduce the code efficiency of current employing, thereby increase the CCE number, incompetent is disturbed the user be converted to interference user.
Preferably, two threshold k still are set
2And K
3, can increase the flexibility that code efficiency is adjusted like this, lead at MISS＜K
2The time, increase the code efficiency of current employing, lead at MISS＞K
3The time, reduce the code efficiency of current employing, lead for MISS and be in [K
2, K
3] situation, uncomfortable reorganization code efficiency then.
Certainly, I also can be taken all factors into consideration in the base station
cAnd R
EncodeRealize adjusting automatically the purpose of PDCCH form.
The present invention program can describe in the general context of the computer executable instructions of being carried out by computer, for example program unit.Usually, program unit comprises the routine carrying out particular task or realize particular abstract data type, program, object, assembly, data structure etc.Also can in distributed computing environment (DCE), put into practice the present invention program, in these distributed computing environment (DCE), be executed the task by the teleprocessing equipment that is connected by communication network.In distributed computing environment (DCE), program unit can be arranged in the local and remote computer-readable storage medium that comprises memory device.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and identical similar part is mutually referring to getting final product between each embodiment, and each embodiment stresses is difference with other embodiment.Especially, for device embodiment, because it is substantially similar in appearance to method embodiment, so describe fairly simplely, relevant part gets final product referring to the part explanation of method embodiment.Device embodiment described above only is schematic, wherein said unit as the separating component explanation can or can not be physically to separate also, the parts that show as the unit can be or can not be physical locations also, namely can be positioned at a place, perhaps also can be distributed on a plurality of network element.Can select wherein some or all of module to realize the purpose of present embodiment scheme according to the actual needs.Those of ordinary skills namely can understand and implement under the situation of not paying creative work.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for helping to understand method and apparatus of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (13)
1. a method of adjusting the PDCCH form is characterized in that, described method comprises:
Obtain a plurality of signal quality of adjacent cells measured values of the affiliated Serving cell of user terminal and described Serving cell, and determine the strongest signal quality of adjacent cells measured value in a plurality of adjacent areas;
The signal quality measured values of calculation services residential quarter and the difference of the strongest signal quality of adjacent cells measured value are determined the interference strength that described Serving cell is disturbed by the strongest adjacent area according to this difference;
Judge whether current PDCCH form adapts with described interference strength, if not, then determine the shared control channel CCE number of PDCCH form that adapts with described interference strength; Adjust the PDCCH form according to described CCE number.
2. method according to claim 1 is characterized in that,
Describedly determine that according to this difference the interference strength that described Serving cell is disturbed by the strongest adjacent area specifically comprises:
More described difference and predetermined threshold value are strong jamming if described difference, is then judged described interference strength greater than described predetermined threshold value;
Describedly judge whether current PDCCH form adapts with described interference strength and specifically comprise:
Judge to use the user terminal of described current PDCCH form whether to be interference user, to disturb the user if described user terminal is incompetent, then to judge described current PDCCH form and described interference strength incompatibility.
3. method according to claim 1 is characterized in that,
Describedly determine that according to this difference the interference strength that described Serving cell is disturbed by the strongest adjacent area specifically comprises:
More described difference and predetermined threshold value are that incompetent is disturbed if described difference, is then judged described interference strength less than described predetermined threshold value;
Describedly judge whether current PDCCH form adapts with described interference strength and specifically comprise:
Judge to use the user terminal of described current PDCCH form whether to be interference user, if described user terminal is interference user, then to judge described current PDCCH form and described interference strength incompatibility.
4. according to claim 2 or 3 described methods, it is characterized in that the judgment mode of described interference user is specially:
Obtain the current PDCCH form that described user terminal uses, and compare with default PDCCH form, if the CCE number that described current PDCCH form takies, judges then that described user terminal is interference user greater than the CCE number that described default PDCCH form takies; Otherwise judge that described user terminal is that incompetent is disturbed the user.
5. according to claim 2 or 3 described methods, it is characterized in that the shared control channel CCE number of described PDCCH form definite and that described interference strength adapts specifically comprises:
Calculate CCE number N according to following formula,
Wherein: PDCCH
1Expression polymerization grade is the RE number that 1 PDCCH form takies; DIC
BitExpression adopts specific DIC form to take bit number; CRC
BitThe bit number that expression adopts CRC check to increase; R
EncodeThe code efficiency of the encoding scheme that expression is adopted; I
cExpression interference user efficiency of transmission is disturbed the transmission coefficient of user's efficiency of transmission with respect to incompetent.
6. method according to claim 5 is characterized in that, before the shared control channel CCE number of described PDCCH form definite and that described interference strength adapts, described method also comprises:
Obtain the code efficiency of the encoding scheme of current employing;
It is long that the sliding window window is set, calculate described window long in the MISS of packet lead, MISS leads=MISS number/window is long; If described MISS leads less than first threshold, then increase the code efficiency of described current employing; If described MISS leads greater than second threshold value, then reduce the code efficiency of described current employing.
7. according to claim 1,2 or 3 described methods, it is characterized in that described signal quality comprises Reference Signal Received Power and/or Reference Signal Received Quality.
8. a device of adjusting the PDCCH form is characterized in that, described device comprises:
The signal quality acquiring unit is used for obtaining a plurality of signal quality of adjacent cells measured values of the affiliated Serving cell of user terminal and described Serving cell, and determines the strongest signal quality of adjacent cells measured value in a plurality of adjacent areas;
The interference strength determining unit is used for the difference of signal quality measured values with the strongest signal quality of adjacent cells measured value of calculation services residential quarter, determines the interference strength that described Serving cell is disturbed by the strongest adjacent area according to this difference;
Adjustment unit is used for judging whether current PDCCH form adapts with described interference strength, if not, then determines the shared control channel CCE number of PDCCH form that adapts with described interference strength; Adjust the PDCCH form according to described CCE number.
9. device according to claim 8 is characterized in that, described interference strength determining unit specifically comprises:
Difference computational unit is used for the difference of signal quality measured values with the strongest signal quality of adjacent cells measured value of calculation services residential quarter;
Interference strength is determined subelement, being used for more described difference and predetermined threshold value, is strong jamming if described difference, is then judged described interference strength greater than described predetermined threshold value, if it is that incompetent is disturbed that described difference, is then judged described interference strength less than described predetermined threshold value.
10. device according to claim 9 is characterized in that, described adjustment unit specifically comprises:
The interference user judging unit is used for judging to use the user terminal of described current PDCCH form whether to be interference user;
Judging unit, being used in described interference strength is strong jamming and described user when disturbing the user for incompetent, perhaps, is that incompetent is disturbed and described user during for interference user in described interference strength, judges described current PDCCH form and described interference strength incompatibility;
Adjust subelement, be used for the indication according to described judging unit, the shared control channel CCE number of PDCCH form definite and that described interference strength adapts is adjusted the PDCCH form according to described CCE number.
11. device according to claim 10 is characterized in that, described interference user judging unit specifically comprises:
The PDCCH format acquisition unit is used for obtaining the current PDCCH form that described user terminal uses;
PDCCH form comparing unit, be used for more described current PDCCH form and default PDCCH form, if the CCE number that described current PDCCH form takies, judges then that described user terminal is interference user greater than the CCE number that described default PDCCH form takies; Otherwise judge that described user terminal is that incompetent is disturbed the user.
12., it is characterized in that described adjustment subelement is specifically determined the CCE number according to following formula according to claim 9,10 or 11 described devices:
Wherein: PDCCH
1Expression polymerization grade is the RE number that 1 PDCCH form takies; DIC
BitExpression adopts specific DIC form to take bit number; CRC
BitThe bit number that expression adopts CRC check to increase; R
EncodeThe code efficiency of the encoding scheme that expression is adopted; I
cExpression interference user efficiency of transmission is disturbed the transmission coefficient of user's efficiency of transmission with respect to incompetent.
13. device according to claim 12 is characterized in that, described adjustment unit also comprises:
The code efficiency acquiring unit is for the code efficiency of the encoding scheme of obtaining current employing;
MISS leads computing unit, and it is long to be used for that the sliding window window is set, and the MISS that calculates the long interior packet of described window leads, and MISS leads=and MISS number/window is long;
The code efficiency adjustment unit is used for increasing the code efficiency of described current employing when described MISS leads less than first threshold; When described MISS leads greater than second threshold value, reduce the code efficiency of described current employing.
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