CN102056299A

CN102056299A - Method and device for transmitting downlink control signalling

Info

Publication number: CN102056299A
Application number: CN2009102091678A
Authority: CN
Inventors: 何宏; 李迎阳
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2009-10-28
Filing date: 2009-10-28
Publication date: 2011-05-11
Also published as: WO2011052978A3; WO2011052978A2

Abstract

The invention discloses a method for transmitting a downlink control signalling. The method comprises the following steps: an eNB configures CC (Component Carrier) for a cell and notifies each UE (User Equipment) of the configuration information of the CC allocated for the UE; when a source CC exists in the CC configured for the UE, and the source CC cannot transmit the DCI-I of the CC and the DCI-II of all target CCs in the search space of the UE in the PDCCH (Physical Downlink Control Channel) area, the number of the DCI-II of all target CCs which can be transmitted in the search space of the UE in the PDCCH area of the CC is determined, and the corresponding number of DCI-II and the DCI-I of the source CC are mapped to the search space of the UE in the PDCCH area of the CC and then transmitted; and an extended area with capacity capable of sufficiently mapping the DCI-II of all the rest target CCs is allocated in a PDSCH area assigned for the DCI-I of the UE in the CC, and the DCI-II of the rest target CCs is mapped to the extended area and transmitted. The invention also discloses a device for transmitting the downlink control signalling. The method and the device can achieve the purpose of eNB transmitting the DCI of a plurality of target CCs within the single CC.

Description

A kind of method and apparatus of transmitting downlink control signal

Technical field

The present invention relates to mobile communication technology, be specifically related to a kind of method and apparatus of transmitting downlink control signal.

Background technology

Current, 3GPP standardization body has finished the formulation of LTE standard, and is formulating a new standard based on the LTE standard and be used to submit to the alternative of ITU tissue as IMT-Advance, and this standard is called as LTE-Advanced, abbreviates LTE-A as.The method of LTE-A system applies carrier aggregation realizes that system bandwidth is configurable, each carrier wave unit is called a carrier wave element (Component Carrier, CC), subscriber equipment in the LTE-A system (User Equipment, UE) can be on each CC operate as normal, the maximum system bandwidth of LTE-A system is 100M.The frame structure of LTE-A system as shown in Figure 1, the radio frames of each 10ms comprises the subframe of 10 1ms, each subframe further comprises the field of two 0.5ms again.For UE distributes CC, the maximum bandwidth that described CC can be used for upstream or downstream transmission and each CC is 20M in each subframe in system.When the CC that distributes is used for when descending, comprise physical layer descending control channel (PDCCH) that is used for transmitting downlink control signal and the physical layer descending data channel (PDSCH) that is used for transmitting downlink data among each CC, heavy line box indicating among Fig. 1 be the PDCCH zone, thinner solid line boxes is then represented the PDSCH zone.

In the standard of LTE system, base station (eNB) may send Downlink Control Information (the Downlink Control Information of different-format for each UE according to the sending mode that UE disposed, DCI)---after eNB encodes DCI, be mapped on the appointment physical resource of Physical Downlink Control Channel (PDCCH), described physical channel resources is meant by 1,2,4 or 8 control channel unit (Control Channel Element, CCE) Resource Block of polymerization, each CCE is by 9 resources bunch (Resource Element Group, REG) constitute, each REG then further is made of 4 RE; Appointment physical resource among the described PDCCH PDCCH search volume that is otherwise known as usually, after after eNB is with the DCI mapping, sending to UE, according to current standard, UE just can obtain the DCI that eNB issues by carry out the blind check of limited number of time in the PDCCH search volume of correspondence.

In LTE-A, initial design principle is that the descending PDCCH of independent transmission is used to dispatch the interior PDSCH of this CC in each CC.But, owing to need the problem that disturb mutually the minizone in the consideration heterogeneous network---for example, in macrocell (Macro-Cell), laid simultaneously under via node (Relay Node) or picocell (Pico-Cell) situation, how to reduce of the interference of Macro-Cell base station, can successfully receive the PDCCH information that via node or pico-cell base station are sent to guarantee each node in via node sub-district or the Pico-Cell sub-district to the PDCCH of via node or Pico-Cell base station.Therefore, the discussion of LTE-A standard has adopted following method to solve: select part CC in all available CC, this part CC is used to send its descending PDCCH information by Pico-cell or Relay sub-district, accordingly, macro cell base station then adopts lower transmitting power to send PDCCH or do not send any PDCCH information on the CC of these Pico-cell or the use of Relay sub-district, thereby reduces the interference of macro cell base station to the PDCCH of via node or Pico-Cell base station; And on remaining CC, macro cell base station then adopts maximum transmitted power to send PDCCH to guarantee the coverage of macrocell.Fig. 2 shows a kind of network configuration of possible using said method, comprise a macro cell base station Macro1, two Pico-cell base stations (being respectively Pico1 and Pico2) among Fig. 2 and be positioned at 6 UE (being respectively UE1, UE2, UE3, UE4, UE5 and UE6) of described Macro1 cell coverage area, and described UE0 and UE1 further are positioned at the cell coverage area of Pico1, and UE4 and UE5 then further are positioned at the cell coverage area of Pico2.

If Macro1 distributes 2 CC (being respectively CC1 and CC2) for each UE in this sub-district, the with dashed lines arrow is illustrated in the transmission of carrying out descending control signaling among the PDCCH among the figure, is illustrated in the transmission of carrying out downlink data among the PDSCH with solid arrow.

In order to reduce the interference of macro cell base station to the PDCCH of Pico-Cell base station, set macrocell and send all descending control signalings this moment on CC1, and in the PDCCH of CC2, do not carry out the transmission of descending control signaling, and in the PDSCH of CC1 and CC2, carry out downlink data transmission.For Pico1 and Pico2, correspondingly in the PDCCH of CC2, carry out the transmission of descending control signaling and in the PDSCH of CC2, carry out downlink data transmission; As shown in Figure 2, thereby can realize that macro cell base station (Macro1) transmits Downlink Control Information respectively with Pico-cell base station (Pico1 and Pico2) on different time-domain positions, thereby can reduce the interference of macro cell base station the PDCCH of Pico-Cell base station.

As seen, on different CC, send PDCCH information with via node or pico-cell base station, can effectively avoid the interference of macro cell base station the PDCCH of via node or Pico-Cell base station by the configuration macro cell base station.

Further, the CC that is used to send its descending PDCCH information for described via node or pico-cell base station, its PDCCH is taken by described via node or pico-cell base station, and its PDSCH resource still can be dispatched by macrocell, therefore, in order to dispatch PDSCH resource in the shared CC of described Pico-cell or Relay to improve the throughput of whole macrocell, this initial designs principle of PDSCH that in the existing standard the descending PDCCH of independent transmission in described each CC is used to dispatch in this CC is revised, proposition increases the label that 1～3 bit identifies the pairing CC of this DCI in existing DCI---promptly, PDCCH in the CC is except transmission is used to dispatch the DCI of the PDSCH resource in this CC, can also in the PDCCH in this CC, transmit the DCI that is used to dispatch the PDSCH resource in other CC, thereby make the LTE-A system can support PDCCH and indicated PDSCH thereof to divide the application that is under the different CC situations.Wherein, the DCI that usually will describedly be used to dispatch the interior PDSCH resource of this CC is called DCI-I, the DCI that will be used to dispatch the PDSCH resource in other CC is called DCI-II, correspondingly, the CC of described DCI-I correspondence is called source CC, and the CC of described DCI-II correspondence is called target CC---promptly, DCI-I is used to indicate the PDSCH resource allocation in this CC, and DCI-II then is used to indicate the PDSCH resource allocation in other CC.

Above-mentioned modification is the direction that 3GPP discusses at present, there is no can be for the standard scheme of practical operation, and in existing LTE-A system, PDCCH search volume in the single CC, its capacity might can't satisfy the demand of the DCI that transmits a plurality of CC correspondences simultaneously, therefore, be necessary to propose a kind of feasible distribution method for a plurality of DCI resource needed of transmission at this situation.

Summary of the invention

The invention provides a kind of method and apparatus of transmitting downlink control signal, can guarantee that eNB sends the DCI of a plurality of target CC in single CC.

For achieving the above object, technical scheme of the present invention specifically is achieved in that

A kind of method of transmitting downlink control signal, this method comprises:

ENB is for this cell configuration CC and notify each UE configuration information for the CC of its distribution;

When existing source CC and this source CC can't be in its PDCCH zone to send the DCI-II of the DCI-I of this CC and all target CC thereof in the search volume of this UE among the CC for UE configuration, determine among the DCI-II of described all target CC, the number of the DCI-II that can be in the PDCCH zone of this CC sends in the search volume of this UE is mapped to the DCI-I of the DCI-II of corresponding number and described source CC in the search volume of this UE in the PDCCH zone of this CC and sends;

Partition capacity is enough shone upon the extended area of the DCI-II of all residue target CC in the PDSCH zone that DCI-I distributed of this UE in this CC, and sends in the middle of the DCI-II of described residue target CC is mapped to described extended area.

Described eNB is for this cell configuration CC and notify each UE to comprise for the method for the configuration information of the CC of its distribution:

ENB broadcasts the CC that disposes in this sub-district by broadcast channel information, and notifies each UE configuration information for the CC of its distribution by radio resource control signaling, and described configuration information comprises the type of descending CC and the corresponding relation of source CC and target CC at least.

Determine among the DCI-II of described all target CC that the method for the number of the DCI-II that can be in the PDCCH zone of this CC sends in the search volume of this UE comprises:

Size and single DCI-II occupation space size according to the search volume of this UE in the PDCCH zone of this CC, determine the number of the DCI-II that can hold in the described search volume, wherein, it is identical that single DCI-II take up space and DCI-I in the same CC take up space, and the size that described DCI-I took up space is the Resource Block of 1,2,4 or 8 CCE polymerization according to the polymerization grade.

According to the size and the single DCI-II occupation space size of the search volume of this UE in the PDCCH zone of this CC, determine the number of the DCI-II that can hold in the described search volume, the RE number n that the RE number is identical and single DCI-II takies that each DCI-II takies ₂=CCE{[(n ₁+ Δ) mod4] } * C; Wherein, n ₁Polymerization grade and 0≤n for the DCI-I of this UE in this CC ₁≤ 3, Δ is that the base station is the amount of bias and 0≤Δ≤3 of UE configuration by the RRC signaling, and mod is for getting surplus operation; This DCI-II comprised when CCE{i} represented that the polymerization grade of DCI-II is i CCE number and CCE{i}=2 ⁱ, 0≤i≤3, C represents that RE number and its value that each CCE comprises are the pre-configured parameter of system.

Described with corresponding number DCI-II and the DCI-I of described source CC be mapped to this CC the PDCCH zone in the method that sends in the search volume of this UE comprise:

ENB generates DCI-I according to the channel quality feedback information of UE, sends in the middle of the DCI-I of the DCI-II of described corresponding number and described source CC being mapped to the search volume of this UE in the PDCCH zone of this CC.

The described method of extended area that partition capacity is enough shone upon the DCI-II of all residue target CC in the PDSCH zone that DCI-I distributed of this UE in this CC comprises:

Partition capacity is for setting the extended area of size in the PDSCH zone that the DCI-I of this UE distributed in this CC, described extended area is at first OFDM sign bit after the PDCCH zone of this CC on the time domain, the RE number that the RE number that it comprises takies more than or equal to the DCI-II of all residue target CC, wherein the RE number that takies of the DCI-II of each residue target CC is identical, and the RE number that comprises of described extended area does not comprise the number of the RE that is taken by reference symbol in this extended area.

The DCI-II of described residue target CC is mapped to after the step that sends in the middle of the described extended area, and this method also comprises:

Adopting the method for rate-matched to be mapped in the PDSCH zone that DCI-I distributed of this UE in this CC the medium downlink data symbol to be sent of this source CC sends in the middle of the zone except that described extended area.

Described extended area is positioned at the PDSCH specific region that DCI-I distributed that UE sends on the CC of source.

The DCI-II of described residue target CC is mapped to the method that sends in the middle of the described extended area to be comprised:

DCI-II cascade with described residue target CC, on the time domain on first OFDM sign-on of described extended area, the frequency domain from the minimum subcarrier of described extended area numbering, the order that increases progressively according to time domain behind the first frequency domain sends in the middle of described DCI-II all is mapped to described extended area.

DCI-II cascade with described residue target CC, finish, from described extended area, select to be numbered on the frequency domain subcarrier in the setting range up to first time slot of current subframe from first OFDM sign-on of described extended area on the time domain, the order that increases progressively according to frequency domain after the first time domain sends in the middle of described DCI-II all is mapped to described extended area.

DCI-II cascade with residue target CC, finish, from described extended area, select to be numbered on the frequency domain subcarrier in the setting range from first OFDM sign-on of described extended area up to current subframe on the time domain, the order that increases progressively according to frequency domain after the first time domain sends in the middle of described DCI-II all is mapped to described extended area.

A kind of device of transmitting downlink control signal, this device comprises:

The CC configuration module is used to this cell configuration CC and notifies each UE configuration information for the CC of its distribution;

The mapping sending module, be used for when the CC for UE configuration exists source CC and this source CC can't be in its PDCCH zone to send the DCI-II of the DCI-I of this CC and all target CC thereof in the search volume of this UE, determine among the DCI-II of described all target CC, the number of the DCI-II that can be in the PDCCH zone of this CC sends in the search volume of this UE is mapped to the DCI-I of the DCI-II of corresponding number and described source CC in the search volume of this UE in the PDCCH zone of this CC and sends; Also be used in this CC PDSCH zone partition capacity that DCI-I distributed of this UE and enough shine upon the extended area of the DCI-II of all residue target CC, and send in the middle of the DCI-II of described residue target CC is mapped to described extended area.

Described CC configuration module comprises:

Radio unit is used for broadcasting the CC that disposes in this sub-district by broadcast channel information;

Allocation units are used for notifying each UE configuration information for the CC of its distribution by radio resource control signaling, and described configuration information comprises the type of descending CC and the corresponding relation of source CC and target CC at least.

Described mapping sending module comprises:

The first mapping transmitting element, be used for size and single DCI-II occupation space size according to the search volume of this UE of PDCCH zone of this CC, determine the number of the DCI-II that can hold in the described search volume, wherein, it is identical that single DCI-II take up space and DCI-I in the same CC take up space, and the size that described DCI-I took up space is the Resource Block of 1,2,4 or 8 CCE polymerization according to the polymerization grade; Or, size and single DCI-II occupation space size according to the search volume of this UE in the PDCCH zone of this CC, determine the number of the DCI-II that can hold in the described search volume, the RE number n that the RE number is identical and single DCI-II takies that each DCI-II takies ₂=CCE{[(n ₁+ Δ) mod 4] } * C; Wherein, n ₁Polymerization grade and 0≤n for the DCI-I of this UE in this CC ₁≤ 3, Δ is that the base station is the amount of bias and 0≤Δ≤3 of UE configuration by the RRC signaling, and mod is for getting surplus operation; This DCI-II comprised when CCE{i} represented that the polymerization grade of DCI-II is i CCE number and CCE{i}=2 ⁱ, 0≤i≤3, C represents that RE number and its value that each CCE comprises are the pre-configured parameter of system; Generate DCI-I according to the channel quality feedback information of UE, send in the middle of the DCI-I of the DCI-II of described corresponding number and described source CC being mapped to the search volume of this UE in the PDCCH zone of this CC;

The second mapping transmitting element, the PDSCH zone partition capacity that DCI-I distributed that is used for this UE in this CC is for setting the extended area of size, described extended area is at first OFDM sign bit after the PDCCH zone of this CC on the time domain, the RE number that the RE number that it comprises takies more than or equal to the DCI-II of all residue target CC, wherein the RE number that takies of the DCI-II of each residue target CC is identical, and the RE number that comprises of described extended area does not comprise the number of the RE that is taken by reference symbol in this extended area; The computing formula of the RE number that the DCI-II of described residue target CC takies is: N ₂=k * n ₂Send in the middle of the DCI-II of described residue target CC is mapped to described extended area.

This device also comprises:

The data map sending module is used for adopting the method for rate-matched to send in the middle of being mapped to the indicated zone of PDSCH zone except that described extended area of the DCI-I of this CC the medium downlink data symbol to be sent of this source CC.

As seen from the above technical solutions, the method and apparatus of the transmitting downlink control signal that the embodiment of the invention provides, can't hold the DCI-I of this CC and all fully in PDCCH search volume need be by the DCI-II of the target CC of its transmission the time as source CC, enough shine upon the extended area of the DCI-II of all residue target CC by partition capacity in the PDSCH zone of source CC, described DCI-I is mapped in the middle of the PDCCH search volume of this source CC, and the DCI-II of described all target CC that need be sent by this source CC is mapped in the middle of the described extended area, can realize that eNB sends the DCI of a plurality of target CC in single CC.

Description of drawings

Fig. 1 is the wireless frame structure schematic diagram of LTE-A system in the prior art.

Fig. 2 is the application schematic diagram the during coexistence of macro cell base station and Pico-Cell base station in the prior art.

Fig. 3 is the schematic flow sheet of the method for transmitting downlink control signal in the embodiment of the invention.

Fig. 4 is the schematic diagram of a kind of CC running time-frequency resource mapping position of system's subframe in the embodiment of the invention.

Fig. 5 is the schematic diagram of second kind of CC running time-frequency resource mapping position of system's subframe in the embodiment of the invention.

Fig. 6 is the schematic diagram of the third CC running time-frequency resource mapping position of system's subframe in the embodiment of the invention.

Fig. 7 is the schematic diagram of the 4th kind of CC running time-frequency resource mapping position of system's subframe in the embodiment of the invention.

Fig. 8 is the composition structural representation of the device of transmitting downlink control signal in the embodiment of the invention.

Embodiment

For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.

The embodiment of the invention at first provides a kind of method of transmitting downlink control signal, for ease of statement, at first introduces some relevant definition and rules below:

Description according to prior art, when eNB is one or more among the CC that distributes of UE, its PDCCH by via node or the pico-cell base station takies and described one or more CC in when comprising the PDSCH resource of needs scheduling again, the pairing DCI of described one or more CC just need not sent by the CC that via node or pico-cell base station take by PDCCH, for the ease of distinguishing, the embodiment of the invention is classified to the CC type, comprising:

First kind CC: refer to that the PDSCH zone that DCI and this DCI are distributed in the CC transmits in same CC---promptly, in the PDCCH of such CC, send and be used for DCI that the PDSCH descending scheduling in this CC is controlled;

The second class CC: refer to that eNB does not send any DCI for UE in this type of CC---promptly, the PDCCH of such CC is taken by via node or pico-cell base station, and comprises the PDSCH resource of carrying out the required scheduling of downlink data transmission to UE in this CC simultaneously;

The 3rd class CC: refer to not only comprise in the CC DCI that is used to dispatch PDSCH resource in this CC, and comprise the DCI that is used to dispatch the interior PDSCH resource of other Type C C (that is to say the second class CC).

In actual applications, eNB can control (Radio Resource Control by Radio Resource, RRC) signaling distributes for each UE the type of its uplink and downlink CC number and each CC, method as for number that is specially UE distribution up-downgoing CC and appointment CC type is not the emphasis that the present invention will discuss, so no longer describe in detail.

For first kind CC, those skilled in the art understand easily, can so the present invention no longer goes through, will be further elaborated at the second and the 3rd class CC below fully according to Rel.8 and the generation of the method that standard provided before and the mapping DCI of existing LTE-A system:

For the second class CC, owing to comprise the PDSCH resource of carrying out the required scheduling of downlink data transmission to UE in this CC, therefore need DCI to come the transmission of downlink data is indicated, PDCCH owing to this CC is taken by via node or pico-cell base station again, therefore, the DCI of described CC is merely able to send by the 3rd class CC;

For the 3rd class CC, because such CC not only comprises the DCI (being DCI-I) that is used to dispatch PDSCH resource in this CC, and comprise the DCI (being DCI-II) that is used to dispatch PDSCH resource in the second class CC, therefore find easily, for certain UE, the second class CC and the 3rd class CC always occur simultaneously in a minute timing---promptly,, then must include the 3rd class CC simultaneously as long as include the second class CC among the CC that eNB is UE to be distributed.As for the concrete number of second, third class CC, then need to determine according to actual conditions.Explanation according to prior art, understand easily, the second class CC of this moment is target CC, hereinafter for convenience of description and distinguish, accordingly, then the 3rd class CC is called source CC---promptly, comprise PDSCH resource to be scheduled in occupied and this CC in the PDCCH search volume of target CC, comprise the DCI-II that is used to dispatch the DCI-I of PDSCH resource in this CC and is used for PDSCH resource in the regulation goal CC among the CC of source simultaneously.

Based on above for the classification of CC, when whether eNB (exists described first kind CC not do qualification when having source CC and target CC among the CC that distributes of UE, because as described in the text, for first kind CC, can generate and mapping DCI according to Rel.8 that has the LTE-A system now and the method that standard provided before thereof fully), amount of capacity according to PDCCH, source CC is different with target CC number, there are several different possibilities, wherein, this CC of DCI-I and all situations can hold to(for) the PDCCH search volume of source CC by the DCI-II of the target CC of its transmission, owing to do not belong to the category that the present invention discusses, therefore do not do going through herein.

And can't hold the DCI-I of this CC and all fully need be by the DCI-II of the target CC of its transmission the time when the PDCCH search volume of source CC, the method that the embodiment of the invention provides a kind of transmitting downlink control signal as shown in Figure 3, this method comprises:

Step 301:eNB is for this cell configuration CC and notify each UE configuration information for the CC of its distribution;

The method of described step 301 comprises: eNB broadcasts the CC that disposes in this sub-district by broadcast channel information, and be the configuration information of the CC of its distribution by each UE of Radio Resource control (RRC) signaling, described configuration information comprises the type of descending CC and the corresponding relation of source CC and target CC at least.

Wherein, the corresponding relation of described source CC and target CC is meant for any one source CC, the DCI-II that comprises which target CC that sends among its CC represents such as the numbering that can use target CC in the practical application in the RRC signaling these targets CC is corresponding to which source CC.

Need to prove, when eNB notified the configuration information of each UE for the CC of its distribution, the configuration information of the CC that distributes for each UE was always not identical, and for example: with the 60MHz system bandwidth is example, if eNB has 4 CC (numbering is respectively CC1, CC2, CC3 and CC4) for this cell allocation, its bandwidth is respectively 20MHz, 20MHz, 10MHz and 10MHz., for certain UE, eNB is first kind CC for it distributes CC1 and CC2, and CC3 is target CC, and CC4 is source CC; And for another UE, then possibility CC1 and CC3 are first kind CC, and CC2 is target CC, and CC4 is source CC.

Step 302: when existing source CC and this source CC can't be in its PDCCH zone to send the DCI-II of the DCI-I of this CC and all target CC thereof in the search volume of this UE among the CC for UE configuration, determine among the DCI-II of described all target CC, the number of the DCI-II that can be in the PDCCH zone of this CC sends in the search volume of this UE is mapped to the DCI-I of the DCI-II of corresponding number and described source CC in the search volume of this UE in the PDCCH zone of this CC and sends.

Wherein, determine among the DCI-II of described all target CC that the method for the number of the DCI-II that can be in the PDCCH zone of this CC sends in the search volume of this UE comprises:

Size and single DCI-II occupation space size according to the search volume of this UE in the PDCCH zone of this CC, determine the number of the DCI-II that can hold in the described search volume, wherein, it is identical that single DCI-II take up space and DCI-I in the same CC take up space, and the size that described DCI-I took up space is the Resource Block of 1,2,4 or 8 CCE polymerization according to the polymerization grade;

Perhaps, size and single DCI-II occupation space size according to the search volume of this UE in the PDCCH zone of this CC, determine the number of the DCI-II that can hold in the described search volume, the RE number n that the RE number is identical and single DCI-II takies that each DCI-II takies ₂=CCE{[(n ₁+ A) mod 4] } * C; Wherein, n ₁Polymerization grade and 0≤n for the DCI-I of this UE in this CC ₁≤ 3, Δ is that the base station is the amount of bias and 0≤Δ≤3 of UE configuration by the RRC signaling, and mod is for getting surplus operation; This DCI-II comprised when CCE{i} represented that the polymerization grade of DCI-II is i CCE number and CCE{i}=2 ⁱ, 0≤i≤3, C represents that RE number and its value that each CCE comprises are the pre-configured parameter of system.

At this moment, described with corresponding number DCI-II and the DCI-I of described source CC be mapped to this CC the PDCCH zone in the method that sends in the search volume of this UE comprise:

ENB generates DCI-I according to the channel quality feedback information (CQI) of UE, sends in the middle of the DCI-I of the DCI-II of described corresponding number and described source CC being mapped to the search volume of this UE in the PDCCH zone of this CC.

Step 303: partition capacity is enough shone upon the extended area of the DCI-II of all residue target CC in the PDSCH zone that DCI-I distributed of this UE in this CC, and sends in the middle of the DCI-II of described residue target CC is mapped to described extended area.

In actual applications, it is identical with the RE number that the DCI-I of this source CC takies to set each DCI-II usually.But need to prove, because the embodiment of the invention is to utilize PDSCH to control the transmission of signaling (being DCI-II) and downlink data simultaneously in these cases, in order to improve the transmission performance of DCI-II, preferably, eNB can also be according to the detection of uplink reference symbol and DCI-II is dispatched the detection of replying of PDSCH in the CC and negative response (ACK/NACK) information, dynamically set the RE number that comprises in the described extended area, correspondingly, the RE number that this moment, RE number that described extended area comprised took more than or equal to the DCI-II of all residue target CC, correspondingly, this moment described all residue target CC the computing formula of the RE number that takies of DCI-II be:

N ₂=k * n ₂, and n ₂=CCE{[(n ₁+ Δ) mod 4] } * C; Wherein, N ₂Be the RE number that the DCI-II of described residue target CC takies, n ₂Be the RE number that single DCI-II takies, k is the number of the DCI-II of residue target CC; n ₁Polymerization grade and 0≤n for the DCI-I of this UE in this CC ₁≤ 3, Δ is that the base station is the amount of bias and 0≤Δ≤3 of UE configuration by the RRC signaling, and mod is for getting surplus operation; This DCI-II comprised when CCE{i} represented that the polymerization grade of DCI-II is i CCE number and CCE{i}=2 ⁱ, 0≤i≤3, C represents that RE number and its value that each CCE comprises are the pre-configured parameter of system.

Meanwhile, should be pointed out that when DCI-II adopts identical polymerization grade (that is, each DCI-II is identical with the RE number that DCI-I takies) with DCI-I, can reduce the number of times that carries out blind check when UE receives described source CC in described extended area, reason is:

After UE receives described source CC, at first need the DCI-I that comprises in the PDCCH region of search is carried out blind check; When DCI-II adopts identical polymerization grade with DCI-I, in case UE is by carrying out the polymerization grade that DCI-I has been determined in blind check to PDCCH, known the polymerization grade of DCI-II in the extended area with regard to corresponding, thus the RE number that need read also just can determine at every turn to detect the time.For example: when UE determined that from the blind check process of PDCCH the polymerization grade of DCI-I is 0, because the polymerization grade of DCI-I and DCI-II is identical, therefore, the RE number that DCI-I and DCI-II take was 36; Then UE is carrying out blind check when parsing DCI-II to described extended area, only need detect up to therefrom parsing the DCI-II that needs according to the mode that reads 36 RE numbers at every turn to get final product; And if DCI-I adopts different polymerization grades or can't determine in advance whether both have adopted identical polymerization grade with DCI-II, even UE finishes blind check and has obtained DCI-I PDCCH, when described extended area is carried out blind check, still need be that unit attempts with 36,72,144 or 288 RE numbers, up to therefrom parsing DCI-II.Obviously, DCI-I adopts identical polymerization grade can significantly reduce the number of times that UE carries out blind check with DCI-II, effectively improves the power consumption of detection efficiency, reduction network delay and the UE of UE.

As seen, when described DCI-II adopts higher polymerization grade, this method can improve the transmission performance of DCI-II, and when adopting the DCI-II polymerization grade identical with DCI-I to implement, this method then can reduce power consumption and the network delay of UE and improve the detection efficiency of UE, therefore, can adjust according to different performance requirements and carrier policy in concrete enforcement, the present invention does not do concrete qualification.

In addition, the DCI-I of this CC and all can't be held fully for the PDCCH search volume of source CC and need 2 kinds of situations can also be further divided into by the situation of the DCI-II of the target CC of its transmission:

1) exist downlink data etc. to be sent among the CC of source, and the PDCCH search volume of source CC can't hold the DCI-I of this CC and all fully need be by the DCI-II of the target CC of its transmission;

2) do not exist downlink data etc. to be sent among the CC of source, and the PDCCH search volume of source CC can't hold all fully need be by the DCI-II of the target CC of its transmission;

No matter for above-mentioned any situation, the DCI-II of residue target CC is mapped to method in the middle of the described extended area can be had multiplely, does not do concrete qualification in the embodiment of the invention, below only enumerates several examples as an illustration:

A, will remain the DCI-II cascade of target CC, on the time domain on first OFDM sign-on of described extended area, the frequency domain from the minimum subcarrier of described extended area numbering, order according to time domain behind the first frequency domain increases progressively is mapped to described extended area with the DCI-II after the described cascade;

B, will remain the DCI-II cascade of target CC, finish, from described extended area, select to be numbered on the frequency domain subcarrier in the setting range up to first time slot of current subframe from first OFDM sign-on of described extended area on the time domain, order according to frequency domain after the first time domain increases progressively is mapped to described extended area with the DCI-II after the described cascade;

C, will remain the DCI-II cascade of target CC, finish, from described extended area, select to be numbered on the frequency domain subcarrier in the setting range from first OFDM sign-on of described extended area up to current subframe on the time domain, order according to frequency domain after the first time domain increases progressively is mapped to described extended area with the DCI-II after the described cascade;

As seen, in method a, DCI-II after the cascade is from subcarrier of minimum of first OFDM symbol of the extended area of described DCI-I distribution, the order that increases progressively according to the subcarrier sequence number is mapped on whole bandwidth of described extended area, and then from subcarrier of minimum of second OFDM symbol of described extended area, the order that increases progressively according to the subcarrier sequence number is mapped on whole bandwidth of described extended area, and the rest may be inferred until the DCI-II after the described cascade being mapped completely in the middle of the extended area.

Among the described method b, the scope of shining upon on the time domain finishes up to first time slot of current subframe for first OFDM symbol from extended area, then any a section in the whole bandwidth of described extended area on the frequency domain, as long as guarantee the DCI-II after the capacity of described extended area is large enough to hold cascade.When concrete mapping, then be to carry out according to the order of first time domain, back frequency domain;

Similarly, among the method c, the scope of shining upon on the time domain then is any a section in the whole bandwidth of described extended area on the frequency domain for first OFDM symbol from extended area finishes up to current subframe, the same DCI-II that needs only after the capacity that guarantees described extended area is large enough to hold cascade.Also need carry out during concrete the mapping according to the order of first time domain, back frequency domain.

It is to be noted, above-mentioned for example just to existing standard and the less better embodiment of equipment change, should not be construed as qualification to embodiment of the present invention, those skilled in the art can carry out other distortion and modification according to actual conditions, can be held by the extended area that DCI-I distributed fully as long as guarantee the DCI-II after the cascade.

At last, those skilled in the art will also be understood that, because described extended area is positioned at the PDSCH zone, and determined the mapping position of reference symbol in the PDSCH zone by parameters such as antenna configurations situations, therefore, in the time of in the extended area that described DCI-II is mapped to the DCI-I distribution, also need to exclude the running time-frequency resource position that those have been taken by reference signal.

After the step 303, this method can further include:

Step 304: adopt the method for rate-matched to be mapped in the indicated PDSCH zone of the DCI-I of this CC the medium downlink data symbol to be sent of this source CC and send in the middle of the zone except that described extended area.

For further explaining the method for above-mentioned transmitting downlink control signal, be specifically described below in conjunction with several concrete applicating examples, the main resource of how to carry out DCI-I and DCI-II of describing is emphatically shone upon in described each example, and the PDCCH region of search of transmission DCI and definite method of extended area, too tediously long for fear of describing, in the following description slightly but the detailed description of function that the public is known or device etc.:

One, in the present embodiment, suppose that system bandwidth is 60M, disposed 4 CC (numbering is respectively CC1, CC2, CC3 and CC4) in this sub-district altogether, the bandwidth of each CC is respectively 20MHz, 20MHz, 10MHz and 10MHz.ENB utilizes broadcast message to carry out the broadcasting of full sub-district, and utilizes the CC numbering and the type of each the UE configuration of RRC signaling, in the present embodiment, supposes that eNB is that current UE configuration CC1 is that the 3rd class CC, CC2 are the second class CC, and descending transmitting antenna number is 2.The signal of the CC running time-frequency resource position in the subframe of system at this moment as shown in Figure 4, supposition UE all has PDSCH data etc. to be sent at each CC of current subframe in the present embodiment, and the PDCCH zone among the CC1 takies 3 OFDM symbols, and the PDCCH zone of CC2 takies 2 OFDM symbols---as shown in Figure 4, first three of a CC1 OFDM symbol (i.e. the first three rows of CC1 among the figure) is its PDCCH zone, and the PDSCH zone of described CC1 is from the 4th OFDM sign bit of current subframe; And preceding two OFDM symbols of CC2 (i.e. preceding two row of CC2 among the figure) are its PDCCH zone, and the PDSCH zone of described CC2 is from the 3rd OFDM sign bit of current subframe.

According to the CC and the type setting thereof that distribute, two different DCI:DCI-I of the corresponding generation of eNB---be used to indicate the resource of PDSCH in the CC1, suppose that eNB is that UE has distributed the 3rd PRB to be used for the transmission of PDSCH; And DCI-II---be used to indicate the resource allocation of PDSCH in the CC2, suppose that eNB is that UE distributes the 12nd PRB to be used for the transmission of the PDSCH of CC2 on CC2;

For CC1, eNB determines to adopt CCE polymerization grade 0 to send DCI-I on CC1 according to the CQI information of UE feedback and the measurement of uplink reference symbol, promptly adopts 36 RE to send DCI-I; According to the method that preamble is mentioned, DCI-II can adopt identical with it CCE polymerization grade, and promptly DCI-II also adopts 36 RE to send on CC1.ENB at first maps to DCI-I and DCI-II as far as possible in the search volume of this UE in the PDCCH zone of CC1 according to oneself dispatching algorithm and sends, but in the present embodiment, the PDCCH zone of this UE only can hold a DCI among the CC1, therefore, eNB preferentially maps to DCI-I on the RE in the PDCCH zone of CC1, and number and the position of the RE that comprises of definite extended area.

In the present embodiment, the method that DCI-II is mapped to extended area is first OFDM sign-on in the PDSCH zone that DCI-I distributes in the same CC on time-domain, promptly from the 4th the OFDM sign-on of the 3rd PRB, occupy the whole bandwidth in the PDSCH zone that DCI-I distributes in the same CC on the frequency domain---i.e. all subcarriers of the 3rd PRB, sum (being 36 RE in this example) according to the required RE of DCI-II that in extended area, sends, increase the number of OFDM symbol in the extended area according to the order of time domain behind the first frequency domain, till the DCI-II sign map that all are to be sent finishes, wherein do not comprise the RE that is used to send reference symbol.Remaining RE such as is used to carry in this CC at PDSCH to be sent.

The mapping position of DCI-I and DCI-II as shown in Figure 4, wherein, zone shown in the right diagonal line hatches is for being used to shine upon the running time-frequency resource position of DCI-I among the PDCCH of CC1, anyhow the zone formed of cross spider shade and pit shade is the extended area that DCI-I distributes among the PDSCH of CC1, the pit shadow region is the running time-frequency resource position that is used to shine upon DCI-II, and the cross spider shade then is the mapping position of downlink data symbol to be sent in the CC1 etc. anyhow; DCI-II PDSCH resource pointed is positioned in the middle of the CC2, and its position is zone shown in the left diagonal line hatches among the figure.According in the preamble to the setting of system, the number of transmit antennas when descending is 2, the mapping position of its reference symbol is the zone at black shade and cross spider shade place, the left and right sides among the figure.

By finding out easily among the figure, DCI-II mapping method in the present embodiment is for according to earlier from left to right, from top to bottom order is mapped to DCI-II in the middle of each OFDM character position again, and this moment DCI-II the bandwidth in the PDSCH zone distributed by DCI-I of the left and right sides boundary of mapping position limited.

Two, in this example, every configuration of system and assumed condition all with precedent in identical, unique difference is the difference of DCI-II mapping method, at this moment, the method that DCI-II is mapped to extended area be on time-domain in the same CC first OFDM sign-on of the PDSCH that DCI-I distributed of UE, promptly from the 4th the OFDM sign-on of the 3rd PRB, finish until first time slot of current subframe; Sum (being 36 RE in this example) according to the required RE of DCI-II that in extended area, sends, increase the number of the subcarrier that sends in the extended area according to the order of frequency domain after the first time domain, till all DCI-II sign map to be sent finish, wherein do not comprise the RE that is used to send reference symbol.Remaining RE such as is used to carry in this CC at PDSCH to be sent.

The signal of the CC running time-frequency resource position in the subframe of system at this moment as shown in Figure 5, wherein, zone shown in the right diagonal line hatches is for being used to shine upon the running time-frequency resource position of DCI-I among the PDCCH of CC1, anyhow the zone of cross spider shade and pit shade composition is the extended area that DCI-I distributed among the PDSCH of CC1, pit shade overlay area is the running time-frequency resource position that is used to shine upon DCI-II, and cross spider shade region then is the mapping position of downlink data symbol to be sent in the CC1 etc. anyhow; DCI-II PDSCH resource pointed is positioned in the middle of the CC2, and its position is zone shown in the left diagonal line hatches among the figure.According in the preamble to the setting of system, the number of transmit antennas when descending is 2, the mapping position of its reference symbol is the zone that black shade and left and right sides cross spider shade cover among the figure.

By finding out easily among the figure, DCI-II mapping method in the present embodiment is for according to earlier from top to bottom, from left to right order is mapped to DCI-II in the middle of each OFDM character position again, and this moment DCI-II the position that begins by PDSCH among this CC of the boundary up and down of mapping position and the end position of first time slot of current subframe limited.

Three, in this example, every configuration of system and assumed condition still all with precedent in identical, unique difference is the difference of DCI-II mapping method, at this moment, the method that DCI-II is mapped to extended area be on time-domain in the same CC first OFDM sign-on of the PDSCH that DCI-I distributed of UE, promptly, finish until current subframe from the 4th the OFDM sign-on of the 3rd PRB; Sum (being 36 RE in this example) according to the required RE of DCI-II that in extended area, sends, increase the number of the subcarrier that sends in the extended area according to the order of frequency domain after the first time domain, till all DCI-II sign map to be sent finish, wherein do not comprise the RE that is used to send reference symbol.Remaining RE such as is used to carry in this CC at PDSCH to be sent.

The signal of the CC running time-frequency resource position in the subframe of system at this moment as shown in Figure 6, wherein, zone shown in the right diagonal line hatches is for being used to shine upon the running time-frequency resource position of DCI-I among the PDCCH of CC1, anyhow the zone formed of cross spider shade and pit shade is the extended area that DCI-I distributes among the PDSCH of CC1, the pit shadow positions is the running time-frequency resource position that is used to shine upon DCI-II, and the cross spider shadow positions then is the mapping position of downlink data symbol to be sent in the CC1 etc. anyhow; DCI-II PDSCH resource pointed is positioned in the middle of the CC2, and its position is zone shown in the left diagonal line hatches among the figure.According in the preamble to the setting of system, the number of transmit antennas when descending is 2, the mapping position of its reference symbol is the zone that black shade and left and right sides cross spider shade cover among the figure.

By finding out easily among the figure, DCI-II mapping method in the present embodiment is for according to earlier from top to bottom, from left to right order is mapped to DCI-II in the middle of each OFDM character position again, and this moment DCI-II the position that begins by PDSCH among this CC of the boundary up and down of mapping position and the end position of current subframe limited.

Four, in the present embodiment, suppose that system bandwidth is 50M, disposed 4 CC (numbering is respectively CC1, CC2, CC3 and CC4) in this sub-district altogether, the bandwidth of each CC is respectively 20MHz, 10MHz, 10MHz, 10MHz.ENB utilizes broadcast message to carry out the broadcasting of full sub-district, and utilize the CC of each UE configuration of RRC signaling to number and type, the signal of the CC running time-frequency resource position in the subframe of system at this moment as shown in Figure 4, in the present embodiment, CC1 is that the 3rd class CC, CC2 and CC3 are the second class CC if eNB is the current UE configuration, and descending transmitting antenna number is 2.Supposition UE all has PDSCH data etc. to be sent at current subframe CC2 and CC3 in the present embodiment, and does not have PDSCH etc. to be sent at CC1; And the PDCCH zone of CC1 takies 3 OFDM symbols, and the PDCCH zone of CC2 and CC3 takies 2 OFDM symbols---as shown in Figure 7, first three of a CC1 OFDM symbol (i.e. the first three rows of CC1 among the figure) is its PDCCH zone, and the PDSCH zone of described CC1 is from the 4th OFDM sign bit of current subframe; And CC2 and CC3, preceding two OFDM symbols (i.e. preceding two row of CC2 and CC3 among the figure) are its PDCCH zone, the PDSCH zone of described CC2 and CC3 is from the 3rd OFDM sign bit of current subframe., then eNB generates two dissimilar DCI:DCI-I---and be used to indicate the resource of PDSCH in the CC1, this PDSCH just is used to send DCI-II, supposes that eNB is that UE has distributed the 3rd PRB to be used for the transmission of PDSCH; And first DCI-II---be used to indicate the resource allocation of PDSCH in the CC2, also have second DCI-II---be used to indicate the resource allocation of PDSCH in the CC3; Suppose that eNB is that UE distributes the 12nd PRB to be used to send the PDSCH of CC2 on CC2; Suppose that eNB is that UE distributes the 10th PRB to be used to send the PDSCH of CC3 on CC3.

For CC1, eNB determines to adopt CCE polymerization grade 0 to send DCI-I on CC1 according to the CQI information of UE feedback and the measurement of uplink reference symbol, promptly adopts 36 RE to send DCI-I; According to the method that preamble is mentioned, DCI-II can adopt identical with it CCE polymerization grade, and promptly each DCI-II also adopts 36 RE to send on CC1.ENB at first all maps to DCI-I and DCI-II as far as possible in the search volume of this UE in the PDCCH zone of CC1 according to oneself dispatching algorithm and sends, but in the present embodiment, the PDCCH zone of this UE only can hold a DCI among the CC1, therefore, eNB preferentially maps to DCI-I on the RE in the PDCCH zone of CC1, and number and the position of the RE that comprises of definite extended area.

In the present embodiment, the scope of extended area is first OFDM sign-on in the PDSCH zone that DCI-I distributes in the same CC on time-domain, and promptly the 4th OFDM sign-on from the 3rd PRB finishes until current subframe; Sum (being 72 RE in this example) according to the required RE of DCI-II that in extended area, sends; Increase the number of extended area sub-carriers according to the order of frequency domain after the first time domain, till all DCI-II sign map to be sent finish, in the present embodiment, extended area not only is used to carry the DCI-II of the PDSCH that dispatches CC2, also be used to carry the 2nd DCI-II of the PDSCH that dispatches CC3, wherein do not comprise the RE that is used to send reference symbol.

The mapping position of DCI-I and DCI-II as shown in Figure 7, wherein, zone shown in the right diagonal line hatches is for being used to shine upon the running time-frequency resource position of DCI-I among the PDCCH of CC1, pit shade, horizontal line shade and anyhow the zone formed of cross spider shade be the extended area that DCI-I distributes among the PDSCH of CC1, the pit shadow positions is the running time-frequency resource position that is used to shine upon a DCI-II, the horizontal line shadow positions is the running time-frequency resource position that is used to shine upon the 2nd DCI-II, and the cross spider shadow positions then is the mapping position of downlink data symbol to be sent in the CC1 etc. anyhow; The one DCI-II PDSCH resource pointed is positioned in the middle of the CC2, and its position is zone shown in the left diagonal line hatches among the figure, and the 2nd DCI-II PDSCH resource pointed is positioned in the middle of the CC3, and its position is zone shown in the vertical line shade among the figure; According in the preamble to the setting of system, the number of transmit antennas when descending is 2, the mapping position of its reference symbol is the zone that black and left and right sides cross spider shade cover among the figure.

By finding out easily among the figure, DCI-II mapping method after the present embodiment cascade is for according to earlier from top to bottom, from left to right order is mapped to DCI-II in the middle of each OFDM character position again, and this moment DCI-II the position that begins by PDSCH among this CC of the boundary up and down of mapping position and the end position of current subframe limited.

On the basis of described method, the embodiment of the invention also provides a kind of device of transmitting downlink control signal, and it forms structure as shown in Figure 8, and this device comprises: CC configuration module 810 and mapping sending module 820;

Wherein, CC configuration module 810 is used to this cell configuration CC and notifies each UE configuration information for the CC of its distribution;

Mapping sending module 820, be used for when the CC for UE configuration exists source CC and this source CC can't be in its PDCCH zone to send the DCI-II of the DCI-I of this CC and all target CC thereof in the search volume of this UE, determine among the DCI-II of described all target CC, the number of the DCI-II that can be in the PDCCH zone of this CC sends in the search volume of this UE is mapped to the DCI-I of the DCI-II of corresponding number and described source CC in the search volume of this UE in the PDCCH zone of this CC and sends; Also be used in this CC PDSCH zone partition capacity that DCI-I distributed of this UE and enough shine upon the extended area of the DCI-II of all residue target CC, and send in the middle of the DCI-II of described residue target CC is mapped to described extended area.

Described CC configuration module 810 comprises radio unit 811 and allocation units 812;

Radio unit 811 is used for broadcasting the CC that disposes in this sub-district by broadcast channel information;

Allocation units 812 are used for the configuration information for the CC of its distribution by each UE of RRC signaling, and described configuration information comprises the type of descending CC and the corresponding relation of source CC and target CC at least.

Described mapping sending module 820 comprises the first mapping transmitting element 821 and the second mapping transmitting element 822;

Wherein, the first mapping transmitting element 821 is used for:

Or, size and single DCI-II occupation space size according to the search volume of this UE in the PDCCH zone of this CC, determine the number of the DCI-II that can hold in the described search volume, the RE number n that the RE number is identical and single DCI-II takies that each DCI-II takies ₂=CCE{[(n ₁+ Δ) mod4] } * C; Wherein, n ₁Polymerization grade and 0≤n for the DCI-I of this UE in this CC ₁≤ 3, Δ is that the base station is the amount of bias and 0≤Δ≤3 of UE configuration by the RRC signaling, and mod is for getting surplus operation; This DCI-II comprised when CCE{i} represented that the polymerization grade of DCI-II is i CCE number and CCE{i}=2 ⁱ, 0≤i≤3, C represents that RE number and its value that each CCE comprises are the pre-configured parameter of system;

Generate DCI-I according to the channel quality feedback information of UE, send in the middle of the DCI-I of the DCI-II of described corresponding number and described source CC being mapped to the search volume of this UE in the PDCCH zone of this CC.

The second mapping transmitting element 822 is used for:

Partition capacity is for setting the extended area of size in the PDSCH zone that the DCI-I of this UE distributed in this CC, described extended area is at first OFDM sign bit after the PDCCH zone of this CC on the time domain, the RE number that the RE number that it comprises takies more than or equal to the DCI-II of all residue target CC, wherein the RE number that takies of the DCI-II of each residue target CC is identical, and the RE number that comprises of described extended area does not comprise the number of the RE that is taken by reference symbol in this extended area; The computing formula of the RE number that the DCI-II of described residue target CC takies is N ₂=k * n ₂n ₂Implication with identical described in the preamble, repeat no more.

Send in the middle of the DCI-II of described residue target CC is mapped to described extended area.

Preferably, this device also further comprises:

Data transmission blocks 830 is used for adopting the method for rate-matched to send in the middle of being mapped to the indicated zone of PDSCH zone except that described extended area of the DCI-I of this CC the medium downlink data symbol to be sent of this source CC.

By as seen above-mentioned, the method and apparatus of the transmitting downlink control signal that the embodiment of the invention provides, when the DCI-I by can't holding this CC fully in the PDCCH search volume as source CC and all need be by the DCI-II of the target CC of its transmission, partition capacity is enough shone upon the extended area of the DCI-II of all residue target CC in the PDSCH zone of source CC, described DCI-I is mapped in the middle of the PDCCH search volume of this source CC, and the DCI-II of described all target CC that need be sent by this source CC is mapped in the middle of the described extended area, thereby can realize that eNB sends the DCI of a plurality of target CC in single CC.And, preferably, when described DCI-II adopted higher polymerization grade, this scheme can improve the transmission performance of DCI-II, and when described DCI-II adopted the polymerization grade identical with DCI-I, this scheme can reduce power consumption and the network delay of UE and improve the detection efficiency of UE.

Claims

1. the method for a transmitting downlink control signal is characterized in that, this method comprises:

2. method according to claim 1 is characterized in that, described eNB is for this cell configuration CC and notify each UE to comprise for the method for the configuration information of the CC of its distribution:

3. method according to claim 2 is characterized in that, determines among the DCI-II of described all target CC, and the method for the number of the DCI-II that can be in the PDCCH zone of this CC sends in the search volume of this UE comprises:

4. method according to claim 2 is characterized in that, determines among the DCI-II of described all target CC, and the method for the number of the DCI-II that can be in the PDCCH zone of this CC sends in the search volume of this UE comprises:

According to the size and the single DCI-II occupation space size of the search volume of this UE in the PDCCH zone of this CC, determine the number of the DCI-II that can hold in the described search volume, the RE number n that the RE number is identical and single DCI-II takies that each DCI-II takies ₂=CCE{[(n ₁+ Δ) mod 4] } * C; Wherein, n ₁Polymerization grade and 0≤n for the DCI-I of this UE in this CC ₁≤ 3, Δ is that the base station is the amount of bias and 0≤Δ≤3 of UE configuration by the RRC signaling, and mod is for getting surplus operation; This DCI-II comprised when CCE{i} represented that the polymerization grade of DCI-II is i CCE number and CCE{i}=2 ⁱ, 0≤i≤3, C represents that RE number and its value that each CCE comprises are the pre-configured parameter of system.

5. according to claim 3 or 4 described methods, it is characterized in that, described with corresponding number DCI-II and the DCI-I of described source CC be mapped to this CC the PDCCH zone in the method that sends in the search volume of this UE comprise:

6. method according to claim 5 is characterized in that, the described method of extended area that partition capacity is enough shone upon the DCI-II of all residue target CC in the PDSCH zone that DCI-I distributed of this UE in this CC comprises:

7. method according to claim 6 is characterized in that, the DCI-II of described residue target CC is mapped to after the step that sends in the middle of the described extended area, and this method also comprises:

8. method according to claim 7 is characterized in that, described extended area is positioned at the PDSCH specific region that DCI-I distributed that UE sends on the CC of source.

9. according to claim 6,7 or 8 described methods, it is characterized in that, the DCI-II of described residue target CC be mapped to the method that sends in the middle of the described extended area comprise:

10. according to claim 6,7 or 8 described methods, it is characterized in that, the DCI-II of described residue target CC be mapped to the method that sends in the middle of the described extended area comprise:

11. according to claim 6,7 or 8 described methods, it is characterized in that, the DCI-II of described residue target CC be mapped to the method that sends in the middle of the described extended area comprise:

12. the device of a transmitting downlink control signal is characterized in that, this device comprises:

13. device according to claim 12 is characterized in that, described CC configuration module comprises:

14. device according to claim 12 is characterized in that, described mapping sending module comprises:

15., it is characterized in that this device also comprises according to each described device in the claim 12 to 14: