CN102291843B - For the method and apparatus that search volume is shared - Google Patents
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- CN102291843B CN102291843B CN201010204128.1A CN201010204128A CN102291843B CN 102291843 B CN102291843 B CN 102291843B CN 201010204128 A CN201010204128 A CN 201010204128A CN 102291843 B CN102291843 B CN 102291843B
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Abstract
The present invention proposes a kind of technical scheme realizing search volume and share, for a kind of descending control information format, take the uniform length irrelevant with component carrier bandwidth, thus make the communal space become possibility.Base station determines whether the initial length of Downlink Control Information is less than the maximum length corresponding to form of this Downlink Control Information; As described in the initial length of Downlink Control Information be less than this Downlink Control Information form corresponding to maximum length, be then that described Downlink Control Information adds bit, make the physical length of described Downlink Control Information equal described maximum length.Correspondingly, user terminal, when receiving Downlink Control Information, according to the position of the bit that base station is added, is deleted the bit of interpolation, thus is obtained the Downlink Control Information of original length from the Downlink Control Information received.
Description
Technical field
The search volume that the present invention relates to Downlink Control Information in LTE-Advanced cordless communication network is shared.
Background technology
In LTE, only there is one-component carrier wave, for each user terminal, only have the Downlink Control Information (DCI) that corresponding, user terminal utilizes RNTI to carry out the blind check of DCI information on PDCCH.
In LTE-Advanced, have employed carrier aggregation to increase power system capacity, also namely in LTE-Advanced, can there is multiple component carrier, system bandwidth can reach 100M.A user terminal may be configured multiple component carrier.
3GPPRAN1#61 meeting have passed the scheme shared across carrier dispatching DCI search volume.Share across carrier dispatching DCI search volume and refer to that user terminal searches for the DCI information of multiple carrier wave in same search volume, the descending control information format shared at least two component carriers that requirement shares across carrier wave DCI search volume has identical form, and these at least two component carriers have identical bandwidth.The advantage shared across carrier wave DCI search volume is to reduce widely the blocking rate (BlockingRate) of user terminal; Or in maintenance with when not sharing identical blocking rate across carrier wave, reduce the Radio Resource shared by search volume.Another benefit shared across searching carrier space effectively to reduce the blind check number of times of user terminal.
But under the prerequisite of current descending control information format, can there is following problem in sharing across searching carrier space of different bandwidth carrier wave:
1. search volume is shared can not
The object that search volume is shared reduces user terminal blind check number of times.But the component carrier being only applicable to have same band is shared in search volume, because the different bandwidth of component carrier result in different Downlink Control Information length.Which prevent the utilization that search volume is shared.
2.PDCCH (Physical Downlink Control Channel) conflicts
Although user terminal can which component carrier know that the bandwidth of certain component carrier, user terminal still must be distinguished by the form of the Downlink Control Information of blind check PDCCH gained and this Downlink Control Information be by detecting BCH (broadcast channel) information.Such as, for component carrier CC1, the form of its Downlink Control Information is Format1B, and bandwidth is 1.25MHz, has the CIF (CarrierIndicatorField, carrier identification territory) of 3 bits; For component carrier CC2, the form of its Downlink Control Information is Format0, bandwidth 10MHz, has the aperiodicity SRS (SoundingReferenceSignal, detection reference signal) of 1 bit; The length of above-mentioned two Downlink Control Information is identical, is all 46 bits.If CC1 and CC2 shares search volume, then user terminal is after blind check to the Downlink Control Information of this length, does not know how to distinguish.
Summary of the invention
The present invention proposes a kind of technical scheme realizing search volume and share, for a kind of descending control information format, take the uniform length irrelevant with component carrier bandwidth, thus make the communal space become possibility.
According to a specific embodiment of the present invention, provide a kind of method for sharing across search volume during carrier dispatching in the base station of cordless communication network, wherein, comprise the following steps: determine whether the initial length of Downlink Control Information is less than the maximum length corresponding to form of this Downlink Control Information; As described in the initial length of Downlink Control Information be less than this Downlink Control Information form corresponding to maximum length, be then that described Downlink Control Information adds bit, make the physical length of described Downlink Control Information equal described maximum length.
Alternatively, the bit of described interpolation can give over to as reserved bit and expand use in the future.
According to another embodiment of the invention, provide a kind of in the user terminal of cordless communication network for obtaining the method for Downlink Control Information across during carrier dispatching, comprise the following steps: the form determining this Downlink Control Information according to the maximum bandwidth of the physical length of the Downlink Control Information of blind check Physical Downlink Control Channel gained, the component carrier of described cordless communication network or scheduling to the maximum bandwidth of the component carrier of this user terminal; Determine the bit number that base station is added to the maximum bandwidth of the component carrier of this user terminal according to the maximum bandwidth of the form of Downlink Control Information, the bandwidth of component carrier that this Downlink Control Information is corresponding, the component carrier of cordless communication network or scheduling; According to the bit number that described base station is added, from the Downlink Control Information of blind check Physical Downlink Control Channel gained, obtain the Downlink Control Information of initial length.
According to still another embodiment of the invention, provide a kind of in the base station of cordless communication network for the method across at least part of public search space overlap of the component carrier dispatched during carrier dispatching, comprise the following steps: in the part public search space of described overlap, the Downlink Control Information for different carrier waves determines different Radio Resource cyclic shifts.
According to still another embodiment of the invention, provide a kind of in the user terminal of cordless communication network for obtaining the method for Downlink Control Information when public search space overlap at least part of across the component carrier dispatched during carrier dispatching, comprise the following steps: according to the different Radio Resource cyclic shift of the Downlink Control Information of different carrier waves, carry out Downlink Control Information described in blind check from the different original positions of the Radio Resource of the part public search space of described overlap.
According to a specific embodiment of the present invention, provide a kind of device for sharing across search volume during carrier dispatching in the base station of cordless communication network, comprise: the first determining device, for determining whether the initial length of Downlink Control Information is less than the maximum length corresponding to the form of this Downlink Control Information; Adding set, for as described in the initial length of Downlink Control Information be less than this Downlink Control Information form corresponding to maximum length, be then that described Downlink Control Information adds bit, make the physical length of described Downlink Control Information equal described maximum length.
According to of the present invention according to a specific embodiment of the present invention, provide a kind of in the user terminal of cordless communication network for obtaining the device of Downlink Control Information across during carrier dispatching, comprise: the second determining device, to determine the form of this Downlink Control Information for the maximum bandwidth of the physical length of the Downlink Control Information according to blind check Physical Downlink Control Channel gained, the component carrier of described cordless communication network or scheduling to the maximum bandwidth of the component carrier of this user terminal; 3rd determining device, determines the bit number that base station is added to the maximum bandwidth of the component carrier of this user terminal for the maximum bandwidth of the form according to Downlink Control Information, the bandwidth of component carrier that this Downlink Control Information is corresponding, the component carrier of cordless communication network or scheduling; Acquisition device, for the bit number added according to described base station, obtains the Downlink Control Information of initial length from the Downlink Control Information of blind check Physical Downlink Control Channel gained.
According to a specific embodiment of the present invention, provide a kind of in the base station of cordless communication network for the device across at least part of public search space overlap of the component carrier dispatched during carrier dispatching, comprise: the 4th determining device, for in the part public search space of described overlap, the Downlink Control Information for different carrier waves determines different Radio Resource cyclic shifts.
According to a specific embodiment of the present invention, provide a kind of in the user terminal of cordless communication network for obtaining the device of Downlink Control Information when public search space overlap at least part of across the component carrier dispatched during carrier dispatching, comprise: blind check device, for the different Radio Resource cyclic shift of the Downlink Control Information according to different carrier waves, carry out Downlink Control Information described in blind check from the different original positions of the Radio Resource of the part public search space of described overlap.
By the technical scheme that Downlink Control Information of the present invention aligns, the search volume that can realize across carrier wave is shared, effectively reduce blocking rate, and decrease the blind check number of times of user terminal, and effectively reduce the control channel resource shared by search volume.
By the technical scheme of at least part of public search space overlap of the present invention, the control channel resource shared by public space can be reduced, by determining different Radio Resource cyclic shifts for the Downlink Control Information of different component carriers, at least partly overlapping public space can be made not need carrier wave identifier just can distinguish component carrier corresponding to Downlink Control Information.
Accompanying drawing explanation
By reading the detailed description done non-limiting example referring to accompanying drawing, other features, objects and advantages of the present invention will become more obvious.
Fig. 1 is application scenarios schematic diagram according to an embodiment of the invention;
Fig. 2 is the method flow diagram for sharing across search volume during carrier dispatching in the base station of cordless communication network according to a specific embodiment of the present invention;
Fig. 3 (a) and Fig. 3 (b) is respectively the schematic diagram of the search volume according to a specific embodiment of the present invention;
Fig. 4 be according to a specific embodiment of the present invention in the user terminal of cordless communication network for obtaining the method flow diagram of Downlink Control Information across during carrier dispatching;
Fig. 5 (a) is non-across search volume schematic diagram during carrier dispatching according to a specific embodiment of the present invention;
Overlapping across at least part of public search space of the component carrier dispatched during carrier dispatching for according to a specific embodiment of the present invention of Fig. 5 (b);
Fig. 6 is the control information element schematic diagram of the Downlink Control Information of different component carriers according to a specific embodiment of the present invention;
Fig. 7 is the structured flowchart of device 700 for sharing across search volume during carrier dispatching in the base station of cordless communication network according to a specific embodiment of the present invention
Fig. 8 be according to a specific embodiment of the present invention in the user terminal of cordless communication network for across the structured flowchart of device 800 obtaining Downlink Control Information during carrier dispatching;
Fig. 9 be according to a specific embodiment of the present invention in the base station of cordless communication network for the structured flowchart of the device 900 across at least part of public search space overlap of the component carrier dispatched during carrier dispatching;
Figure 10 is for obtaining the structured flowchart of the device 100 of Downlink Control Information when public search space overlap at least part of across the component carrier dispatched during carrier dispatching in the user terminal of cordless communication network;
Wherein, same or analogous Reference numeral represents same or analogous steps characteristic or device (module).
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are described in detail.
Fig. 1 shows the application scenarios schematic diagram of the cordless communication network 100 according to a specific embodiment of the present invention.Those of ordinary skill in the art will be understood that for brevity, and the cordless communication network 100 in Fig. 1 illustrate only base station 110 and user terminal 120, and actual cordless communication network comprises multiple base station, and each base station has multiple user terminal under its command.
Fig. 2 shows the method flow diagram for sharing across search volume during carrier dispatching in the base station of cordless communication network according to a specific embodiment of the present invention.The process that user terminal 120 carries out sharing across search volume during carrier dispatching is described in detail in the base station 110 in Fig. 1 below in conjunction with Fig. 2.
First, in step s 201, base station 110 determines whether the initial length of the Downlink Control Information of user terminal 120 is less than the maximum length corresponding to form of this Downlink Control Information.
Then, in step S202, initial length as Downlink Control Information is less than the maximum length corresponding to the form of this Downlink Control Information, be then that described Downlink Control Information adds bit, make the physical length of described Downlink Control Information equal described maximum length.The bit of described interpolation can give over to as reserved bit expands use in the future.
Then, base station 120 is placed on PDCCH channel sends adding the Downlink Control Information after bit.
In one embodiment, the system configuration of the transmission mode of base station 110 residing for user terminal 120 and cordless communication network determines the form of the Downlink Control Information of user terminal 120.Such as, for the form defining multiple Downlink Control Information in the version of LTE-Advanced, 3GPPTS36.212Release9, Format0 is comprised, Format1, Format1A, Format1B, Format1C, Format1D, Format2, Format2A, Format3, Format3A.Wherein, Format0 is used for the scheduling of PUSCH, Format1 is used for the scheduling of PDSCH code word, the compression scheduling that Format1A is used for a PDSCH code word and the Stochastic accessing step initiated by PDCCH order, physical meaning about other form describes in detail no longer one by one at this, and details can see TS36.212-900.
As mentioned before, as the bandwidth difference (number of Resource Block shared in other words) of component carrier, for the Downlink Control Information of same form, its initial length is also different.Resourse Distribute volume bit (RA, ResourceAllocation) in the corresponding Downlink Control Information of bandwidth of component carrier, component bandwidth is larger, and RA bit number is more.Such as Format1A, the RA bit number of the 20M bandwidth of its correspondence is 13, and the length of the Downlink Control Information of Format1A is 48 bits.Under component carrier different bandwidth has been shown in table 1, the number of the RA bit that various descending control information format is corresponding, wherein, the first row represents bandwidth, the Resource Block number that this bandwidth of the second line display is corresponding.
It should be noted that, maximum length corresponding to the form of the Downlink Control Information described in step S201 comprises dispatches to maximum length corresponding to the maximum bandwidth carrier wave of user terminal 120, or the maximum length that the maximum bandwidth carrier wave of cordless communication network 100 use is corresponding.Such as Format1A, if the maximum bandwidth carrier wave that cordless communication network 100 uses is 20MHz, but scheduling is 10MHz to the maximum bandwidth carrier wave of user terminal 120.If the maximum length corresponding to the form of Downlink Control Information is the maximum length that the maximum bandwidth carrier wave of cordless communication network 100 use is corresponding, if carrier bandwidths corresponding to current downlink control information is 5MHz, according to table 1,4 bits need be added to this Downlink Control Information in base station 110; Carrier bandwidths as corresponding in current downlink control information is 10MHz, and according to table 1,2 bits need be added to this Downlink Control Information in base station 110.If the maximum length corresponding to the form of Downlink Control Information is dispatch to maximum length corresponding to the maximum bandwidth carrier wave of user terminal 120, if carrier bandwidths corresponding to current downlink control information is 5MHz, according to table 1,2 bits need be added to this Downlink Control Information in base station 110; Carrier bandwidths as corresponding in current downlink control information is 10MHz, and according to table 1, base station 110 is without the need to adding bit to this Downlink Control Information.
Those of ordinary skill in the art will be understood that, the bit of interpolation can be placed on Downlink Control Information Anywhere by base station 110, such as in the head of Downlink Control Information initial length bit, afterbody or centre, as long as user terminal 120 knows the position that bit adds, correctly Downlink Control Information can be solved.The form of the bit added is not limit, and can be to retain position, or other has the bit of specific meanings, or full 0, and complete 1 etc.
For the situation across carrier dispatching, usually, under multiple component carrier is all in identical transmission mode, thus, the descending control information format adopted of each component carrier is identical, by making the RA bit aligned of RA bit in Downlink Control Information and maximum length, the DCI search volume of multiple component carrier is shared can be realized.
Fig. 3 (a) shows the schematic diagram of the search volume according to a specific embodiment of the present invention.In Fig. 3 (a), the CCE (ControlChannelElement) being labeled as oblique line pattern represents the special search volume being originally used for one-component carrier wave CC1, the CCE being labeled as cross figure represents that Level represents the degree of polymerization of CCE originally for the dedicated search space of another component carrier CC2.After employing search volume is shared, the CCE shown in above-mentioned two kinds of patterns all can be used for the Downlink Control Information carrying component carrier CC1 and CC2.Greatly reduce the blocking rate of user terminal like this.
Further, when adopting search volume to share, the control channel resource shared by search volume can also be reduced further, the less blocking rate realized do not shared across searching carrier space can be reached equally, as shown in Fig. 3 (b).In other words when sharing across searching carrier space, less search volume just can reach the blocking rate identical with when not sharing across searching carrier space.
Fig. 4 show according to a specific embodiment of the present invention in the user terminal of cordless communication network for obtaining the method flow diagram of Downlink Control Information across during carrier dispatching.Below in conjunction with the application scenarios shown in Fig. 1, the flow process that user terminal 120 performs in Fig. 4 is described in detail.
First, in step S401, user terminal 120 is according to the maximum bandwidth of the physical length of the Downlink Control Information of blind check Physical Downlink Control Channel gained, the component carrier of cordless communication network 100 or dispatch the form determining this Downlink Control Information to the maximum bandwidth of the component carrier of this user terminal.It should be noted that, when multiple form all may exist, the form that what user terminal 120 was determined should be Downlink Control Information is possible.
Then, in step S402, user terminal 120 determines the bit number that base station 110 is added to the maximum bandwidth of the component carrier of this user terminal according to the maximum bandwidth of the form of Downlink Control Information, the bandwidth of component carrier that this Downlink Control Information is corresponding, the component carrier of cordless communication network 100 or scheduling.
Then, in step S403, the bit number that user terminal 120 adds according to base station 110, obtains the Downlink Control Information of initial length from the Downlink Control Information of blind check Physical Downlink Control Channel gained.
As described above, if this user terminal 120 is 48 bits from the decode physical length of a gained Downlink Control Information of the Physical Downlink Control Channel of component carrier CC1, and set the maximum bandwidth of the component carrier of cordless communication network 100 as 20MHz, and base station 110 is come for Downlink Control Information adds bit number as criterion, giving advance notice user terminal 120 in this criterion base station 110, or is preset in user terminal 120.Then accordingly, the form of user terminal 120 this Downlink Control Information known may be Format0, Format1A.
By broadcast channel, user terminal 120 learns that base station 110 is dispatched to the bandwidth of its component carrier is 5MHz, and the maximum bandwidth of the component carrier of cordless communication network 100 is 20MHz, then user terminal 120 can determine that the bit number added base station 110 is 4 bits accordingly.
Then the bit number that adds according to base station 110 of user terminal 120, obtains the Downlink Control Information of initial length from the Downlink Control Information of blind check Physical Downlink Control Channel gained.Particularly, the position that user terminal 120 adds bit according to base station 110 to remove from this corresponding position the bit added.
For Format0 and Format1A, because the Downlink Control Information length of these two kinds of forms is identical, therefore distinguish this two kinds of forms with first bit of Downlink Control Information.
For the Downlink Control Information that other some length are identical, 3GPPTS36.212/213 in all define corresponding differentiation mechanism to distinguish them, such as Format1A and Format3A, the transmission mode be applied to due to them is different, can not occur, also namely these two kinds of forms can be distinguished by the time simultaneously, about other some differentiation mechanism, be not described in detail in this, in detail can see 3GPPTS36.212/213.
During across carrier dispatching, user terminal 120 to be decoded to obtain one, two or more Downlink Control Information from the downlink physical control channel of one-component carrier wave.To be decoded to obtain the physical length of each Downlink Control Information by above-mentioned steps, distinguish component carrier corresponding to each Downlink Control Information by CIF (CarrierIndicatorField) field in Downlink Control Information.
For the situation not having CIF field in Downlink Control Information, then can not be suitable for search volume and share.The Downlink Control Information of each component carrier must be put on the specific Physical Downlink Control Channel of each component carrier.
In TS36.213, define two kinds of search volumes, one is USS (UEspecificSearchSpace), and another kind is CSS (CommonSearchSpace).USS refers to the specific search volume of user terminal, and CSS refers to public search volume.Define only for carrying the Downlink Control Information of this several form of Format0/1A/3/3A/1C in CSS in current 3GPP agreement, the descending control information format that base station 110 will be detected by high-level signaling informing user terminal 120.
If there is CIF field in the Format of CSS carrying, then can be suitable for the search volume across carrier dispatching mentioned above and share, distinguish different component carriers by the CIF field in DCIFormat.But the agreement according to current 3GPP specifies, usually, there is no CIF field in the Format carried by CSS, therefore, the above-mentioned search volume across carrier dispatching can not be adopted to share at CSS, for each component carrier, particular radio resource is adopted to carry out bearing downlink control information, as shown in Fig. 5 (a), wherein, vertical line pattern represents the search volume of component carrier CC1, and horizontal line pattern represents the search volume of component carrier CC2.In order to save Radio Resource, Radio Resource corresponding for the downlink physical control channel of multiple component carrier can be carried out partial sharing, as shown in Fig. 5 (b), wherein, dot pattern represents the search volume that component carrier CC1 and component carrier CC2 can share, and this application scenarios can be called across at least part of public search space of the component carrier dispatched during carrier dispatching overlapping.
For the control channel Radio Resource shared, namely in the part public search space of described overlap, base station 110 is that the Downlink Control Information of different carrier determines different Radio Resource cyclic shifts.Be such as granularity for Radio Resource with CCE, base station 110 is by the different CCE cyclic shifts for different component carrier determination Downlink Control Information to distinguish different component carriers, and the granularity of this cyclic shift can be one or more CCE.Alternatively, in one embodiment, base station 110 can be different component carrier determination Downlink Control Information cyclic shift value different in a CCE aggregation group to distinguish different component carriers, and as shown in Figure 6, the number of the CCE in a CCE aggregation group is 8.For different component carriers, such as, component carrier CC1, base station 110 can determine that the cyclic shift value of its Downlink Control Information in aggregation group is 0 CCE; For component carrier CC2, base station 110 can determine that the cyclic shift value of its Downlink Control Information in aggregation group is 1 CCE.
For the Radio Resource of control channel with resource element (RE, ResourceElement) be the situation of granularity, base station 110 is by the different RE cyclic shifts for different component carrier determination Downlink Control Information to distinguish different component carriers, and the granularity of this cyclic shift can be one or more RE.
Accordingly, user terminal 120, according to the different Radio Resource cyclic shift of the Downlink Control Information of different carrier waves, carrys out Downlink Control Information described in blind check from the different original positions of the Radio Resource of the part public search space of described overlap.Be such as granularity for Radio Resource with CCE, user terminal 120, according to the CCE cyclic shift of the Downlink Control Information of different component carrier, carrys out blind check Downlink Control Information from the different original positions of the CCE of the Radio Resource shared.As there is CCE aggregation group, then according to the different CCE cyclic shifts of different component carriers in CCE aggregation group, carry out blind check Downlink Control Information from the original position that CCE is different.For the situation shown in Fig. 6, user terminal 120 carries out the blind check of the Downlink Control Information of component carrier CC1 from the 0th CCE of each aggregation group; User terminal 120 carries out the blind check of the Downlink Control Information of component carrier CC2 from the 1st CCE of each aggregation group, and after the data of the 0th CCE are placed on the 7th CCE.
For the situation that the Radio Resource of control channel is granularity with resource element (RE, ResourceElement), it is the operation that granularity is similar with CCE that user terminal 120 performs with Radio Resource, carrys out blind check Downlink Control Information.
Fig. 7 shows the structural representation of device 700 for sharing across search volume during carrier dispatching in the base station of cordless communication network according to a specific embodiment of the present invention.In the figure 7, device 700 comprises the first determining device 701 and adding set 702.Below in conjunction with Fig. 7, the process that 700 pairs of user terminals of the device in the base station 110 in Fig. 1 120 carry out sharing across search volume during carrier dispatching is described in detail.
First, the first determining device 701 determines whether the initial length of the Downlink Control Information of user terminal 120 is less than the maximum length corresponding to form of this Downlink Control Information.
Then, the initial length as Downlink Control Information is less than the maximum length corresponding to the form of this Downlink Control Information, then adding set 702 is that described Downlink Control Information adds bit, makes the physical length of described Downlink Control Information equal described maximum length.The bit of described interpolation can give over to as reserved bit expands use in the future.
It should be noted that, the maximum length corresponding to the form of above-mentioned Downlink Control Information comprises dispatches to maximum length corresponding to the maximum bandwidth carrier wave of user terminal 120, or the maximum length that the maximum bandwidth carrier wave of cordless communication network 100 use is corresponding.Such as Format1A, if the maximum bandwidth carrier wave that cordless communication network 100 uses is 20MHz, but scheduling is 10MHz to the maximum bandwidth carrier wave of user terminal 120.If the maximum length corresponding to the form of Downlink Control Information is the maximum length that the maximum bandwidth carrier wave of cordless communication network 100 use is corresponding, if carrier bandwidths corresponding to current downlink control information is 5MHz, according to table 1, adding set 702 need add 4 bits to this Downlink Control Information; Carrier bandwidths as corresponding in current downlink control information is 10MHz, and according to table 1, adding set 702 need add 2 bits to this Downlink Control Information.If the maximum length corresponding to the form of Downlink Control Information is dispatch to maximum length corresponding to the maximum bandwidth carrier wave of user terminal 120, if carrier bandwidths corresponding to current downlink control information is 5MHz, according to table 1, adding set 702 need add 2 bits to this Downlink Control Information; Carrier bandwidths as corresponding in current downlink control information is 10MHz, and according to table 1, adding set 702 is without the need to adding bit to this Downlink Control Information.
Those of ordinary skill in the art will be understood that, the bit of interpolation can be placed on Downlink Control Information Anywhere by adding set 702, such as in the head of Downlink Control Information initial length bit, afterbody or centre, as long as user terminal 120 knows the position that bit adds, correctly Downlink Control Information can be solved.The form of the bit added is not limit, and can be to retain position, or other has the bit of specific meanings, or full 0, and complete 1 etc.
For the situation across carrier dispatching, usually, under multiple component carrier is all in identical transmission mode, thus, the descending control information format adopted of each component carrier is identical, by making the RA bit aligned of RA bit in Downlink Control Information and maximum length, the DCI search volume of multiple component carrier is shared can be realized.
Fig. 8 show according to a specific embodiment of the present invention in the user terminal of cordless communication network for across the structural representation of device 800 obtaining Downlink Control Information during carrier dispatching.In fig. 8, device 800 comprises the second determining device 801, the 3rd determining device 802 and acquisition device 803.
Below in conjunction with the application scenarios shown in Fig. 1, the course of work of the device 800 being arranged in user terminal 120 is described in detail.
First, the second determining device 801 to determine the form of this Downlink Control Information to the maximum bandwidth of the component carrier of this user terminal according to the maximum bandwidth of the physical length of the Downlink Control Information of blind check Physical Downlink Control Channel gained, the component carrier of cordless communication network 100 or scheduling.
Then, the 3rd determining device 802 determines the bit number that base station 110 is added to the maximum bandwidth of the component carrier of this user terminal according to the maximum bandwidth of the form of Downlink Control Information, the bandwidth of component carrier that this Downlink Control Information is corresponding, the component carrier of cordless communication network 100 or scheduling.
Then, the bit number that acquisition device 803 adds according to base station 110, obtains the Downlink Control Information of initial length from the Downlink Control Information of blind check Physical Downlink Control Channel gained.
Fig. 9 show according to a specific embodiment of the present invention in the base station of cordless communication network for the structured flowchart of the device 900 across at least part of public search space overlap of the component carrier dispatched during carrier dispatching.In fig .9, device 900 comprises the 4th determining device 901.Below in conjunction with Fig. 1, the course of work of the 4th determining device 901 of the base station 110 being arranged in Fig. 1 is described in detail.
For the control channel Radio Resource shared, namely in the part public search space shared, the 4th determining device 901 is that the Downlink Control Information of different carrier determines different Radio Resource cyclic shifts.Be such as granularity for Radio Resource with CCE, the 4th determining device 901 is by the different CCE cyclic shifts for different component carrier determination Downlink Control Information to distinguish different component carriers, and the granularity of this cyclic shift can be one or more CCE.Alternatively, in one embodiment, 4th determining device 901 can be different component carrier determination Downlink Control Information cyclic shift value different in a CCE aggregation group to distinguish different component carriers, and as shown in Figure 6, the number of the CCE in a CCE aggregation group is 8.For different component carriers, such as, component carrier CC1, the 4th determining device 901 can determine that the cyclic shift value of its Downlink Control Information in aggregation group is 0 CCE; For component carrier CC2, the 4th determining device 901 can determine that the cyclic shift value of its Downlink Control Information in aggregation group is 1 CCE.
For the Radio Resource of control channel with resource element (RE, ResourceElement) be the situation of granularity, 4th determining device 901 is by the different RE cyclic shifts for different component carrier determination Downlink Control Information to distinguish different component carriers, and the granularity of this cyclic shift can be one or more RE.
Figure 10 shows in the user terminal of cordless communication network for obtaining the structured flowchart of the device 100 of Downlink Control Information when public search space overlap at least part of across the component carrier dispatched during carrier dispatching.In Fig. 10, device 100 comprises blind check device 101.Below in conjunction with the application scenarios shown in Fig. 1, the course of work of the device 100 being arranged in user terminal 120 is described in detail.
With the course of work of the device 900 in Fig. 9 accordingly, blind check device 101, according to the different Radio Resource cyclic shift of the Downlink Control Information of different carrier waves, carrys out Downlink Control Information described in blind check from the different original positions of the Radio Resource of the part public search space of described overlap.Be such as granularity for Radio Resource with CCE, blind check device 101, according to the CCE cyclic shift of the Downlink Control Information of different component carrier, carrys out blind check Downlink Control Information from the different original positions of the CCE of the Radio Resource shared.As there is CCE aggregation group, then according to the different CCE cyclic shifts of different component carriers in CCE aggregation group, carry out blind check Downlink Control Information from the original position that CCE is different.For the situation shown in Fig. 6, blind check device 101 carries out the blind check of the Downlink Control Information of component carrier CC1 from the 0th CCE of each aggregation group; Blind check device 101 carries out the blind check of the Downlink Control Information of component carrier CC2 from the 1st CCE of each aggregation group, and after the data of the 0th CCE are placed on the 7th CCE.
For the situation that the Radio Resource of control channel is granularity with resource element (RE, ResourceElement), it is the operation that granularity is similar with CCE that blind check device 101 performs with Radio Resource, carrys out blind check Downlink Control Information.
Below only example is shared as with two component carrier search volumes, to invention has been detailed description, those of ordinary skill in the art will be understood that, the situation that the situation share three or more component carrier search volumes and two component carrier search volumes are shared is similar, does not repeat them here.
It should be noted that, above-described embodiment is only exemplary, but not limitation of the present invention.Any technical scheme not deviating from spirit of the present invention all should fall within protection scope of the present invention.In addition, any Reference numeral in claim should be considered as the claim involved by restriction; " comprise " word and do not get rid of device unlisted in other claim or specification or step; " one " before device does not get rid of the existence of multiple such device; In the equipment comprising multiple device, the one or more function in the plurality of device can be realized by same hardware or software module; The word such as " first ", " second ", " the 3rd " is only used for representing title, and does not represent any specific order.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the appended claims.
Claims (9)
1. the method for sharing across search volume during carrier dispatching in the base station of cordless communication network, comprises the following steps:
-determine whether the initial length of Downlink Control Information is less than the maximum length corresponding to form of this Downlink Control Information;
-as described in the initial length of Downlink Control Information be less than this Downlink Control Information form corresponding to maximum length, be then that described Downlink Control Information adds bit, make the physical length of described Downlink Control Information equal described maximum length.
2. method according to claim 1, wherein, the step of described interpolation bit comprises the following steps:
-after the initial length bit of described Downlink Control Information, add bit.
3. method according to claim 1 and 2, wherein, the bit of described interpolation is reservation bit.
4. method according to claim 1, wherein, maximum length corresponding to the form of this Downlink Control Information described comprises dispatches to maximum length corresponding to the maximum bandwidth carrier wave of user terminal, or the maximum length that the maximum bandwidth carrier wave of described cordless communication network use is corresponding.
5. in the user terminal of cordless communication network for obtaining the method for Downlink Control Information across during carrier dispatching, comprise the following steps:
-determine the form of this Downlink Control Information to the maximum bandwidth of the component carrier of this user terminal according to the maximum bandwidth of the physical length of the Downlink Control Information of blind check Physical Downlink Control Channel gained, the component carrier of described cordless communication network or scheduling;
-determine the bit number that base station is added to the maximum bandwidth of the component carrier of this user terminal according to the maximum bandwidth of the form of Downlink Control Information, the bandwidth of component carrier that this Downlink Control Information is corresponding, the component carrier of cordless communication network or scheduling;
-the bit number that adds according to described base station, obtains the Downlink Control Information of initial length from the Downlink Control Information of blind check Physical Downlink Control Channel gained.
6. the device for sharing across search volume during carrier dispatching in the base station of cordless communication network, comprising:
First determining device, for determining whether the initial length of Downlink Control Information is less than the maximum length corresponding to the form of this Downlink Control Information;
Adding set, for as described in the initial length of Downlink Control Information be less than this Downlink Control Information form corresponding to maximum length, be then that described Downlink Control Information adds bit, make the physical length of described Downlink Control Information equal described maximum length.
7. device according to claim 6, wherein, the bit of described interpolation is reservation bit.
8. device according to claim 6, wherein, maximum length corresponding to the form of this Downlink Control Information described comprises dispatches to maximum length corresponding to the maximum bandwidth carrier wave of user terminal, or the maximum length that the maximum bandwidth carrier wave of described cordless communication network use is corresponding.
9. in the user terminal of cordless communication network for obtaining the device of Downlink Control Information across during carrier dispatching, comprising:
Second determining device, to determine the form of this Downlink Control Information to the maximum bandwidth of the component carrier of this user terminal for the maximum bandwidth of the physical length of the Downlink Control Information according to blind check Physical Downlink Control Channel gained, the component carrier of described cordless communication network or scheduling;
3rd determining device, determines the bit number that base station is added to the maximum bandwidth of the component carrier of this user terminal for the maximum bandwidth of the form according to Downlink Control Information, the bandwidth of component carrier that this Downlink Control Information is corresponding, the component carrier of cordless communication network or scheduling;
Acquisition device, for the bit number added according to described base station, obtains the Downlink Control Information of initial length from the Downlink Control Information of blind check Physical Downlink Control Channel gained.
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| WO2014172870A1 (en) * | 2013-04-25 | 2014-10-30 | 华为技术有限公司 | Method and device for transmitting downlink control information |
| CN103929816A (en) * | 2013-10-15 | 2014-07-16 | 上海朗帛通信技术有限公司 | User device in TDD-FDD combination system, system device in TDD-FDD combination system, method for user device, and method for system device |
| CN110034842A (en) * | 2018-01-12 | 2019-07-19 | 中国移动通信有限公司研究院 | A kind of method and device, equipment, storage medium for transmitting DCI |
| CN114157397A (en) * | 2018-05-11 | 2022-03-08 | 维沃移动通信有限公司 | Method and equipment for determining downlink control information |
| CN111148230B (en) * | 2018-11-02 | 2022-11-08 | 华为技术有限公司 | Method and device for transmitting downlink control information |
| WO2020172803A1 (en) * | 2019-02-26 | 2020-09-03 | Oppo广东移动通信有限公司 | Wireless communication method, terminal device and network device |
| WO2021056595A1 (en) * | 2019-09-29 | 2021-04-01 | 华为技术有限公司 | Communication method and apparatus |
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| CN101651996A (en) * | 2009-09-17 | 2010-02-17 | 中兴通讯股份有限公司 | Method and system for transmitting index of component carrier and control format indicating value |
| CN101714892A (en) * | 2009-11-02 | 2010-05-26 | 中兴通讯股份有限公司 | Method and system for transmitting downlink control information |
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