CN101925112B - Method and equipment for determining number of channel control blocks - Google Patents
Method and equipment for determining number of channel control blocks Download PDFInfo
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- CN101925112B CN101925112B CN 200910086886 CN200910086886A CN101925112B CN 101925112 B CN101925112 B CN 101925112B CN 200910086886 CN200910086886 CN 200910086886 CN 200910086886 A CN200910086886 A CN 200910086886A CN 101925112 B CN101925112 B CN 101925112B
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Abstract
The invention relates to a wireless communication technology, particularly to a method and equipment for determining the number of CCE (Channel Control Equipment), which not only can be used for determining the number of the CCE, but also has cell capacity and PDCCH demodulation performance, so that the selected number of the CCE is relatively reasonable, thereby reducing the influence on the capacity of cells and the transmission quality of the PDCCH. The method of the embodiment of the invention comprises the following steps of: determining the maximum number of bits carried by each selectable PDCCH in a wireless frame according to CQI information; determining the quality parameter of each PDCCH according to the determined maximum number of bits carried by each PDCCH and the data size of the control signaling needing to be transmitted currently; and comparing the maximum quality parameter in the determined quality parameters of all PDCCHs with the threshold value, selecting a PDCCH from all selectable PDCCHs in the wireless frame according to the comparative result, and determining the number of control channel blocks corresponding to the selected PDCCH.
Description
Technical field
The present invention relates to wireless communication technology, particularly the method and apparatus of a kind of definite CCE (Control ChannelElement, channel control blocks) quantity.
Background technology
At LTE (Long Term Evolution, Long Term Evolution) in the system, the base station is by PDCCH (physicaldownlink control channel, Physical Downlink Control Channel) transmission uplink scheduling signaling, descending scheduling signaling and power control signal, the reliability of these signallings is very important to throughput of system, and the error rate of requirement is more much lower than PDSCH (Physical Downlink Shared Channel physical down link sharing channel) channel.
Terminal (UE) can not be known the actual physical resources position at PDCCH place in advance when receiving signaling by PDCCH, only have the mode by blind Detecting, receives signaling by PDCCH after detecting PDCCH.
The mode of this blind Detecting has increased the complexity of UE, affects the performance of UE.In order to reduce the number of times of blind Detecting, the LTE agreement becomes several Resource Block with the physical resource dividing of reality, and a Resource Block is a CCE, and one of them CCE takies 36 RE (Resource Element, Physical Resource Block); Then again several CCE are formed a blind Detecting district.Stipulate simultaneously, terminal is only carried out blind Detecting in several specific blind Detecting zone.Can reduce like this blind check number of times of terminal, improve the performance of terminal.
The LTE agreement is stipulated at present, and the operable CCE quantity of PDCCH has 4 kinds, is respectively { 1,2,4,8}, network side is selected a bearer control signalling from all optional PDCCH, terminal is by carrying out blind Detecting to all optional PDCCH, thereby finds the PDCCH of bearer control signalling.
Select the CCE of varying number, the also just corresponding optional original position of being the CCE of PDCCH, the channel condition of these positions can affect the transmission gain of PDCCH.If the CCE quantity of selecting is too much, so that the coding gain that information redundancy brings is larger, but can cause the capacity of whole residential quarter; If the CCE quantity of selecting is very few, although the capacity of residential quarter increases, the coding gain that information redundancy brings is less.
In sum, when definite CCE quantity, owing to can not take into account cell capacity and PDCCH demodulation performance, so that the quantity of the CCE that network side is selected is unreasonable, thereby the capacity of residential quarter and the transmission quality generation of PDCCH are had a strong impact at present.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of definite number of channel control blocks, can be when definite CCE quantity, take into account cell capacity and PDCCH demodulation performance, so that the quantity of the CCE that selects is more reasonable, thereby reduced impact on the transmission quality of the capacity of residential quarter and PDCCH.
The method of a kind of definite CCE quantity that the embodiment of the invention provides, the method comprises:
According to channel quality indicator CQI information, determine the maximum number bits that each optional physical downlink control channel PDCCH can be carried in the radio frames;
The maximum number bits that can carry according to each PDCCH that determines, and the current data volume that needs the control signal of transmission are determined the mass parameter of each PDCCH;
Mass parameter and threshold value maximum in the mass parameter of all definite PDCCH are compared, from a radio frames, select a PDCCH among all optional PDCCH according to comparative result, and control channel number of blocks corresponding to PDCCH of determining selection.
The equipment of a kind of definite CCE quantity that the embodiment of the invention provides, this equipment comprises:
The bit number determination module is used for according to channel quality indicator CQI information, determines the maximum number bits that each optional physical downlink control channel PDCCH can be carried in the radio frames;
The mass parameter determination module is used for the maximum number bits that each definite PDCCH of basis can carry, and the current data volume that needs the control signal of transmission, determines the mass parameter of each PDCCH;
Comparison module, mass parameter and the threshold value maximum for the mass parameter of all PDCCH that will determine compare;
Select module, be used for from all optional PDCCH of a radio frames, selecting a PDCCH according to comparative result;
Block of channels quantity determination module is used for definite control channel number of blocks corresponding to PDCCH of selecting.
The embodiment of the invention is determined the maximum number bits that each optional physical downlink control channel PDCCH can be carried in the radio frames according to channel quality indicator CQI information; The maximum number bits that can carry according to each PDCCH that determines, and the current data volume that needs the control signal of transmission are determined the mass parameter of each PDCCH; Mass parameter and threshold value maximum in the mass parameter of all definite PDCCH are compared, from a radio frames, select a PDCCH among all optional PDCCH according to comparative result, and control channel number of blocks corresponding to PDCCH of determining selection.Because when definite CCE quantity, take into account cell capacity and PDCCH demodulation performance, so that the quantity of the CCE that selects is more reasonable, thereby reduced the impact on the transmission quality of the capacity of residential quarter and PDCCH, further can also be in the transmission quality that guarantees PDCCH, reduce the CCE that takies as far as possible, thereby increased the terminal quantity of little area carrier.
Description of drawings
Fig. 1 is the device structure schematic diagram that the embodiment of the invention is determined the control channel number of blocks;
Fig. 2 is the method flow schematic diagram that the embodiment of the invention is determined the control channel number of blocks.
Embodiment
The embodiment of the invention is according to CQI (Channel Quality Indicator, the channel quality indication) information, determine the maximum number bits that each optional PDCCH can carry in the radio frames, and the maximum number bits that can carry according to each PDCCH that determines, and the current data volume that needs the control signal of transmission, determine the mass parameter of each PDCCH; According to mass parameter maximum in the mass parameter of all PDCCH that determine and the comparative result of threshold value, from a radio frames, select a PDCCH among all optional PDCCH, and control channel number of blocks corresponding to PDCCH of determining selection.Because when definite CCE quantity, take into account cell capacity and PDCCH demodulation performance, so that the quantity of the CCE of selection is more reasonable, thereby reduced impact on the transmission quality of the capacity of residential quarter and PDCCH.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
As shown in Figure 1, the embodiment of the invention determines that the equipment of control channel number of blocks comprises: bit number determination module 10, mass parameter determination module 20, comparison module 30, selection module 40 and block of channels quantity determination module 50.
Bit number determination module 10 is used for according to CQI information, determines the maximum number bits that each optional PDCCH can carry in the radio frames.
Wherein, bit number determination module 10 is according to the corresponding relation of predefined CQI information and CQI efficiency value, determine the CQI efficiency value (being efficiency) that the CQI information of terminal on each PDCCH is corresponding, CQI efficiency value corresponding to each PDCCH of determining be multiply by the quantity that a control channel piece takies Physical Resource Block RE, the maximum number bits that the numerical value that obtains can carry as the PDCCH of correspondence (be HoldBits[M]=the RE number * efficiency).
The quantity that control channel piece of regulation takies Physical Resource Block RE in the agreement at present is 36.Certainly, also can adjust as required the quantity that a control channel piece takies Physical Resource Block RE.
The corresponding relation of concrete CQI information and CQI efficiency value can be referring to table 1:
Table 1
Data in the table 1 are the CQI form data in 36213 agreements, that is to say that table 1 is a kind of normative reference, can set the corresponding relation of CQI information and CQI efficiency value as required.
Owing to do not have at present mechanism to allow terminal to report to the CQI information of PDCCH in the agreement, but PDCCH being identical with the residing frequency domain position of PDSCH, therefore directly use the CQI of PDSCH to get final product as the reference standard.
In specific implementation process, because the modulation system that PDCCH uses can only be QPSK, if when the corresponding 16QAM of the CQI information of terminal to report or 64QAM, need to carry out correcting process to CQI information, can adopt simple process, namely according to the proportionate relationship of modulation system, directly revise CQI.Certainly the embodiment of the invention also can adopt other correcting process modes.
Mass parameter determination module 20, for the maximum number bits that can carry according to bit number determination module 10 each definite PDCCH, and the current data volume (be Len, unit is bit) that needs the control signal of transmission, determine the mass parameter (be Weight[M]) of each PDCCH.
Wherein, the maximum number bits that each PDCCH that mass parameter determination module 20 is determined bit number determination module 10 can carry is respectively divided by the current data volume that needs the control signal of transmission, the numerical value that obtains as the value of the mass parameter of the PDCCH of correspondence (Weight[M]=HoldBits[M] ÷ Len).
Wherein, comparison module 30 can be with Weight[M] by from small to large order ordering, form SortWeight[M after the ordering], then with SortWeight[M-1] (i.e. maximum mass parameter) and threshold value (T) compare.
Select module 40, be used for from all optional PDCCH of a radio frames, selecting a PDCCH according to the comparative result of comparison module 30.
Wherein, select module 40 the comparative result of comparison module 30 be maximum mass parameter during less than threshold value (SortWeight[M-1]＜T), the PDCCH that the mass parameter of maximum is corresponding is as the PDCCH that selects;
The comparative result of comparison module 30 be maximum mass parameter when being not less than threshold value (SortWeight[M-1] 〉=T), determine all less than PDCCH corresponding to the mass parameter of threshold value, and from all PDCCH that determine, select a PDCCH.
Better a kind of mode is: be that maximum mass parameter is when being not less than threshold value at the comparative result of comparison module 30, determine less than PDCCH corresponding to the mass parameter of threshold value, corresponding relation according to predefined PDCCH and control channel number of blocks, determine that all are less than control channel number of blocks corresponding to the PDCCH of the mass parameter of threshold value, from all PDCCH less than the mass parameter of threshold value that determine, select a PDCCH of control channel number of blocks minimum.
Such benefit is under the prerequisite of the data volume that can satisfy carrying, takies minimum control channel number of blocks.
In specific implementation process, corresponding how many control channel numbers of blocks of each PDCCH can be set as required.
Block of channels quantity determination module 50 is used for control channel number of blocks corresponding to PDCCH of determining that selection module 40 is selected.
Concrete, block of channels quantity determination module 50 determines to select the control channel number of blocks corresponding to PDCCH of module 40 selections according to the corresponding relation of PDCCH and control channel number of blocks, then can from the PDCCH that takies this control channel number of blocks, determine an idle PDCCH who is used for the carrying data, 2 such as the control channel number of blocks, and the PDCCH one that takies 2 control channel pieces has 6, then can select the PDCCH carrying data of a free time from these 6 PDCCH.
Block of channels quantity determination module 50 can also be determined the position of each optional PDCCH, and wherein the position of each PDCCH is designated as Pdcch[M], behind the PDCCH that selects a free time, just can accurately find the position of this PDCCH like this.
Concrete, block of channels quantity determination module 50 calculates the position of 22 optional PDCCH.Circular specifically divides following several step referring to 36.213 agreements:
(1): according to the CRNTI (Cell Radio Network TemporaryIdentifier, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) of time point and user terminal, calculate field of search original position.
(2): the original position from the field of search, take number according to CCE, calculate the position of PDCCH.
Implementation excessively in, the data volume of PDCCH carrying, according to different DCI (Downlinkcontrol information, Downlink Control Information) form and difference, then the embodiment of the invention determines that the equipment of control channel number of blocks can further include: data volume determination module 60.
Data volume determination module 60 is used for according to predefined DCI form and data volume corresponding relation, determines current data volume corresponding to DCI form that needs use, with the data volume of determining amount of data as the current control signal that need to transmit.
Wherein, DCI form and data volume corresponding relation can be set as required, and such as under the 20M bandwidth, DCI form and data volume corresponding relation can be referring to tables 2:
| The DCI form | Bit number |
| 0 | 31 |
| 1 | 42 |
| 1a | 31 |
| 2 | 54 |
| 2a | 51 |
| 3/3a | 31 |
| 1b | 43 |
| 1c | 17 |
| 1d | 32 |
The bit number of correspondence under table 2DCI form and the 20M bandwidth
Wherein, can set as required with the threshold value that the mass parameter of maximum compares, preferably set corresponding threshold value according to the packet loss of terminal to report, then the embodiment of the invention determines that the equipment of control channel number of blocks can further include: setting module 70.
Setting module 70 is used for the corresponding relation according to predefined threshold value and number of dropped packets scope, threshold value corresponding to number of dropped packets scope under the number of dropped packets of coming self terminal of determining to receive.
In specific implementation process, the corresponding relation of threshold value and number of dropped packets scope can be set as required.
The embodiment of the invention determines that the equipment of control channel number of blocks can be the base station, also can be other equipment of network side, can also be the new equipment of network side.
As shown in Figure 2, the embodiment of the invention determines that the method for control channel number of blocks comprises the following steps:
Step 201, according to CQI information, determine the maximum number bits that each optional PDCCH can carry in the radio frames.
Step 202, the maximum number bits that can carry according to each PDCCH that determines, and the current data volume (be Len, unit is bit) that needs the control signal of transmission are determined the mass parameter (be Weight[M]) of each PDCCH.
Mass parameter and threshold value maximum in the mass parameter of step 203, all PDCCH that will determine compare, according to comparative result PDCCH of selection among all optional PDCCH from a radio frames.
Step 204, definite control channel number of blocks corresponding to PDCCH of selecting.
Wherein, in the step 201 according to the corresponding relation of predefined CQI information and CQI efficiency value, determine the CQI efficiency value (being efficiency) that the CQI information of terminal on each PDCCH is corresponding, CQI efficiency value corresponding to each PDCCH of determining be multiply by the quantity that a control channel piece takies Physical Resource Block RE, the maximum number bits that the numerical value that obtains can carry as the PDCCH of correspondence (be HoldBits[M]=the RE number * efficiency).
The quantity that control channel piece of regulation takies Physical Resource Block RE in the agreement at present is 36.Certainly, also can adjust as required the quantity that a control channel piece takies Physical Resource Block RE.
The corresponding relation of concrete CQI information and CQI efficiency value can be referring to table 1.
Data in the table 1 are the CQI form data in 36213 agreements, that is to say that table 1 is a kind of normative reference, can set the corresponding relation of CQI information and CQI efficiency value as required.
Owing to do not have at present mechanism to allow terminal to report to the CQI information of PDCCH in the agreement, but PDCCH being identical with the residing frequency domain position of PDSCH, therefore directly use the CQI of PDSCH to get final product as the reference standard.
In specific implementation process, because the modulation system that PDCCH uses can only be QPSK, if when the corresponding 16QAM of the CQI information of terminal to report or 64QAM, need to carry out correcting process to CQI information, can adopt simple process, namely according to the proportionate relationship of modulation system, directly revise CQI.Certainly the embodiment of the invention also can adopt other correcting process modes.
In the step 202, the maximum number bits that each PDCCH that determines can be carried is respectively divided by the current data volume that needs the control signal of transmission, the numerical value that obtains as the value of the mass parameter of the PDCCH of correspondence (Weight[M]=HoldBits[M] ÷ Len).
Can be with Weight[M in the step 203] by from small to large order ordering, form SortWeight[M after the ordering], then with SortWeight[M-1] (i.e. maximum mass parameter) and threshold value (T) compare.
Further, comparative result be maximum mass parameter during less than threshold value (SortWeight[M-1]＜T), the PDCCH that the mass parameter of maximum is corresponding is as the PDCCH that selects;
Comparative result be maximum mass parameter when being not less than threshold value (SortWeight[M-1] 〉=T), determine all less than PDCCH corresponding to the mass parameter of threshold value, and from all PDCCH that determine, select a PDCCH.
Better a kind of mode is: be that maximum mass parameter is when being not less than threshold value at comparative result, determine less than PDCCH corresponding to the mass parameter of threshold value, corresponding relation according to predefined PDCCH and control channel number of blocks, determine that all are less than control channel number of blocks corresponding to the PDCCH of the mass parameter of threshold value, from all PDCCH less than the mass parameter of threshold value that determine, select a PDCCH of control channel number of blocks minimum.
Such benefit is under the prerequisite of the data volume that can satisfy carrying, takies minimum control channel number of blocks.
In specific implementation process, corresponding how many control channel numbers of blocks of each PDCCH can be set as required.
In the step 204, can determine according to the corresponding relation of PDCCH and control channel number of blocks the control channel number of blocks corresponding to PDCCH of selection, then can from the PDCCH that takies this control channel number of blocks, determine an idle PDCCH who is used for the carrying data, 2 such as the control channel number of blocks, and the PDCCH one that takies 2 control channel pieces has 6, then can select the PDCCH carrying data of a free time from these 6 PDCCH.
In specific implementation process, the embodiment of the invention determines that the method for control channel number of blocks can also determine the step of the position of each optional PDCCH, wherein the position of each PDCCH is designated as Pdcch[M], behind the PDCCH that selects a free time, just can accurately find the position of this PDCCH like this.
Concrete, can calculate the position of 22 optional PDCCH.Circular specifically divides following several step referring to 36.213 agreements:
(1): according to the CRNTI of time point and user terminal, calculate field of search original position.
(2): the original position from the field of search, take number according to CCE, calculate the position of PDCCH.
Implementation excessively in, the data volume of PDCCH carrying, according to different DCI forms and difference, it is definite according to the following step that then current in the step 202 needs the data volume of control signal of transmission:
According to predefined DCI form and data volume corresponding relation, determine current data volume corresponding to DCI form that needs use, with the data volume of determining amount of data as the current control signal that need to transmit
Wherein, DCI form and data volume corresponding relation can be set as required, and such as under the 20M bandwidth, DCI form and data volume corresponding relation can be referring to tables 2.
Wherein, the threshold value in the step 203 can be set as required.Preferably set corresponding threshold value according to the packet loss of terminal to report, then the threshold value in the step 203 can be determined according to the following step:
According to the corresponding relation of predefined threshold value and number of dropped packets scope, threshold value corresponding to number of dropped packets scope under the number of dropped packets of coming self terminal of determining to receive.
In specific implementation process, the corresponding relation of threshold value and number of dropped packets scope can be set as required.
The below further specifies the embodiment of the invention take table 3 as example.
Table 3 is corresponding position, the field of search and channel positions of terminal, referring to table 3:
| The PDCCH numbering | The CCE size | Can be used for the CCE set (with CCE index sign) of PDCCH | The channel quality rank of UE feedback | HoldBits[M] |
| 1 | 1 | (20) | 6 | 42.33 |
| 2 | 1 | (21) | 6 | 42.33 |
| 3 | 1 | (22) | 6 | 42.33 |
| 4 | 1 | (23) | 6 | 42.33 |
| 5 | 1 | (24) | 6 | 42.33 |
| 6 | 1 | (25) | 6 | 42.33 |
| 7 | 2 | (42，43) | 6 | 84.66 |
| 8 | 2 | (44，45) | 6 | 84.66 |
| 9 | 2 | (46，47) | 6 | 84.66 |
| 10 | 2 | (48，49) | 6 | 84.66 |
| 11 | 2 | (50，51) | 6 | 84.66 |
| 12 | 2 | (52，53) | 6 | 84.66 |
| 13 | 4 | (0，1，2，3) | 6 | 169.29 |
| 14 | 4 | (4，5，6，7) | 6 | 169.29 |
| 15 | 8 | (40，41，42，43，44，45，46，47) | 6 | 338.57 |
| 16 | 8 | (48，49，50，51，52，53，54，55) | 6 | 338.57 |
| 17 | 4 | (0，1，2，3) | 6 | 169.29 |
| 18 | 4 | (4，5，6，7) | 6 | 169.29 |
| 19 | 4 | (8，9，10，11) | 6 | 169.29 |
| 20 | 4 | (12，13，14，15) | 6 | 169.29 |
| 21 | 8 | (0，1，2，3，4，5，6，7) | 6 | 338.57 |
| 22 | 8 | (8，9，10，11，12，13，14，15) | 6 | 338.57 |
Table 3
According to background technology, network side can be selected the PDCCH of a free time at random from 22 PDCCH, if CCE size (being quantity) selects 8, the coding gain that information redundancy brings is larger, but can cause the capacity of whole residential quarter less; If select 1, although then the capacity of residential quarter increases, the coding gain that information redundancy brings is less.That is to say, can not take into account cell capacity and PDCCH demodulation performance in the background technology, select CCE quantity.
According to the scheme of the embodiment of the invention, for DCI form 1, the size of determining CCE is 1, then can select to number an idle PDCCH of 1～6, this moment, the data volume of channel bearing met the demands, and got final product therefore PDCCH takies 1 CCE, thereby had saved the CCE resource.For DCI form 2, the size of determining CCE is 2,4 or 8, and (1～6 any idle PDCCH is because the carrying data can not meet the demands, so can not select), better selection PDCCH takies 2 CCE, so should select to number an idle PDCCH of 7～12, can under the prerequisite that satisfies the PDCCH transmission quality requirements, take less the CCE resource this moment as far as possible.The situation of other DCI forms and top similar repeats no more.
Can find out from above-described embodiment: the embodiment of the invention is determined the maximum number bits that each optional physical downlink control channel PDCCH can be carried in the radio frames according to channel quality indicator CQI information; The maximum number bits that can carry according to each PDCCH that determines, and the current data volume that needs the control signal of transmission are determined the mass parameter of each PDCCH; Mass parameter and threshold value maximum in the mass parameter of all definite PDCCH are compared, from a radio frames, select a PDCCH among all optional PDCCH according to comparative result, and control channel number of blocks corresponding to PDCCH of determining selection.
Because when definite CCE quantity, take into account cell capacity and PDCCH demodulation performance, so that the quantity of the CCE that selects is more reasonable, thereby reduced the impact on the transmission quality of the capacity of residential quarter and PDCCH, further can also be in the transmission quality that guarantees PDCCH, reduce the CCE that takies as far as possible, thereby increased the terminal quantity of little area carrier.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. the method for definite control channel piece CCE quantity is characterized in that, the method comprises:
According to channel quality indicator CQI information, determine the maximum number bits that each optional physical downlink control channel PDCCH can be carried in the radio frames;
The maximum number bits that can carry according to each PDCCH that determines, and the current data volume that needs the control signal of transmission are determined the mass parameter of each PDCCH;
Mass parameter and threshold value maximum in the mass parameter of all definite PDCCH are compared, from a radio frames, select a PDCCH among all optional PDCCH according to comparative result, and control channel number of blocks corresponding to PDCCH of determining selection;
The described maximum number bits of determining that each optional PDCCH can carry in the radio frames comprises: according to the corresponding relation of predefined CQI information and CQI efficiency value, determine CQI efficiency value corresponding to the CQI information of terminal on each PDCCH; CQI efficiency value corresponding to each PDCCH of determining be multiply by the quantity that a control channel piece takies Physical Resource Block RE, the maximum number bits that the numerical value that obtains can carry as the PDCCH of correspondence; Describedly determine that the mass parameter of each PDCCH comprises: the data volume of the control signal that the maximum number bits that each PDCCH that will determine can carry is transmitted divided by current needs respectively, the numerical value that obtains is as the value of the mass parameter of the PDCCH of correspondence; The step of determining the data volume of the current control signal that need to transmit comprises: according to predefined Downlink Control Information DCI form and data volume corresponding relation, determine current data volume corresponding to DCI form that needs use, with the data volume of determining amount of data as the current control signal that need to transmit.
2. the method for claim 1 is characterized in that, describedly selects a PDCCH to comprise from a radio frames among all optional PDCCH according to comparative result:
Be maximum mass parameter during less than threshold value at comparative result, the PDCCH that the mass parameter of described maximum is corresponding is as the PDCCH that selects;
Be maximum mass parameter when being not less than threshold value at comparative result, determine all less than PDCCH corresponding to the mass parameter of threshold value, and from all PDCCH that determine, select a PDCCH.
3. method as claimed in claim 2 is characterized in that, is maximum mass parameter when being not less than threshold value at comparative result, describedly selects a PDCCH to comprise from the described PDCCH that determines:
According to the corresponding relation of predefined PDCCH and control channel number of blocks, determine that all are less than control channel number of blocks corresponding to the PDCCH of the mass parameter of threshold value;
From all PDCCH less than the mass parameter of threshold value that determine, select a PDCCH of control channel number of blocks minimum.
4. method as claimed in claim 1 or 2 is characterized in that, described threshold value is determined according to the following step:
According to the corresponding relation of predefined threshold value and number of dropped packets scope, threshold value corresponding to number of dropped packets scope under the number of dropped packets of coming self terminal of determining to receive.
5. the equipment of definite control channel piece CCE quantity is characterized in that, this equipment comprises:
The bit number determination module is used for according to channel quality indicator CQI information, determines the maximum number bits that each optional physical downlink control channel PDCCH can be carried in the radio frames;
The mass parameter determination module is used for the maximum number bits that each definite PDCCH of basis can carry, and the current data volume that needs the control signal of transmission, determines the mass parameter of each PDCCH;
Comparison module, mass parameter and the threshold value maximum for the mass parameter of all PDCCH that will determine compare;
Select module, be used for from all optional PDCCH of a radio frames, selecting a PDCCH according to comparative result;
Block of channels quantity determination module is used for definite control channel number of blocks corresponding to PDCCH of selecting; Described bit number determination module specifically is used for: according to the corresponding relation of predefined CQI information and CQI efficiency value, determine CQI efficiency value corresponding to the CQI information of terminal on each PDCCH; CQI efficiency value corresponding to each PDCCH of determining be multiply by the quantity that a control channel piece takies Physical Resource Block RE, the maximum number bits that the numerical value that obtains can carry as the PDCCH of correspondence; Described mass parameter determination module specifically is used for: divided by the data volume of the control signal of current needs transmission, the numerical value that obtains is as the value of the mass parameter of the PDCCH of correspondence respectively for the maximum number bits that each PDCCH that will determine can carry; Described equipment also comprises: the data volume determination module, be used for according to predefined Downlink Control Information DCI form and data volume corresponding relation, determine current data volume corresponding to DCI form that needs use, with the data volume of determining amount of data as the current control signal that need to transmit.
6. equipment as claimed in claim 5 is characterized in that, described selection module specifically is used for:
Be maximum mass parameter during less than threshold value at comparative result, the PDCCH that the mass parameter of described maximum is corresponding is as the PDCCH that selects;
Be maximum mass parameter when being not less than threshold value at comparative result, determine all less than PDCCH corresponding to the mass parameter of threshold value, and from all PDCCH that determine, select a PDCCH.
7. equipment as claimed in claim 6 is characterized in that, described selection module also is used for:
That maximum mass parameter is when being not less than threshold value at comparative result, determine that all are less than PDCCH corresponding to the mass parameter of threshold value, corresponding relation according to predefined PDCCH and control channel number of blocks, determine that all are less than control channel number of blocks corresponding to the PDCCH of the mass parameter of threshold value, from all PDCCH less than the mass parameter of threshold value that determine, select a PDCCH of control channel number of blocks minimum.
8. such as claim 5 or 6 described equipment, it is characterized in that, described equipment also comprises:
Setting module is used for the corresponding relation according to predefined threshold value and number of dropped packets scope, threshold value corresponding to number of dropped packets scope under the number of dropped packets of coming self terminal of determining to receive.
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| CN102821421A (en) * | 2011-06-10 | 2012-12-12 | 中兴通讯股份有限公司 | Configuration method and device for physical downlink control channel (PDCCH) format |
| CN102869113B (en) * | 2011-07-06 | 2016-01-27 | 上海贝尔股份有限公司 | The method and apparatus of the physical accidental access in a kind of communication network |
| CN102325378B (en) * | 2011-08-31 | 2015-02-18 | 新邮通信设备有限公司 | Method and device for controlling physical downlink control channel (PDCCH) transmission |
| CN102421178B (en) * | 2011-12-15 | 2014-06-04 | 大唐移动通信设备有限公司 | Method and equipment for allocating power of downlink control channel |
| CN104144503B (en) * | 2013-05-10 | 2017-11-24 | 中国电信股份有限公司 | Dynamic improves method, system and the mobile terminal of the PDCCH capacity upper limit |
| CN105743609A (en) * | 2014-12-12 | 2016-07-06 | 中兴通讯股份有限公司 | Method and device for determining channel quality indication CQI efficiency |
| CN105991218A (en) * | 2015-02-02 | 2016-10-05 | 中国电信股份有限公司 | PDCCH blind detection method and system, and terminal |
| EP3451560B1 (en) * | 2016-05-17 | 2020-03-25 | Huawei Technologies Co., Ltd. | Data transmission method and apparatus |
| US10051618B2 (en) * | 2016-07-01 | 2018-08-14 | Intel IP Corporation | Methods and devices for control channel decoding |
| CN107846269B (en) * | 2016-09-20 | 2020-05-15 | 工业和信息化部电信研究院 | Wireless control channel design method and device |
| MX2020008517A (en) * | 2018-02-13 | 2020-09-18 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Method for blind detection of physical downlink control channel and terminal device. |
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