CN101981995A - Method and device of allocating control channel and indicating ACK/NACK channel's allocation - Google Patents

Abstract

A method for allocating PDCCH channel, includes: dividing the physical downlink control channel (PDCCH) into two sets according to a scheduled PDCCH format; setting a control channel element (CCE) from the allocable control channel elements as a constant beginning CCE for each set; allocating CCE for each set of PDCCH sets, beginning respectively from the said constant beginning CCE. The embodiment of the invention also provides an indicating method for allocating ACK/NACK channel, a device for allocating PDCCH, a device for sending ACK/NACK channel, a device for receiving ACK/NACK channel, a base station and a terminal using said device for sending ACK/NACK channel and said device for receiving ACK/NACK channel. With this embodiment, it is practical to indicate recessively the allocation of ACK/NACK channel, and to reduce the waste of communication channel resources.

Description

The method and apparatus that control channel distributes and the ACK/NACK channel allocation is indicated

The application requires respectively on 08 31st, 2007, on November 30th, 2007, submitted Patent Office of the People's Republic of China on 02 01st, 2008 to, application number is respectively 200710076820.9,200710188292.6 and 200810005083.8, denomination of invention is respectively " the control channel unit distributes and obtain accordingly the method for ACK/NACK channel; device and base station; terminal ", the priority of the Chinese patent application of " method and apparatus that control channel distributes and the ACK/NACK channel allocation is indicated " and " method and apparatus that control channel distributes and the ACK/NACK channel allocation is indicated ", its full content are by reference in conjunction with in this application.

Technical field

The present invention relates to wireless communication technology, relate in particular to the method and apparatus that the control channel unit distributes and the ACK/NACK channel allocation is indicated.

Background technology

Insert (E-UTRA at third generation cooperative programme (3GPP) evolution global radio, EvolvedUniversal Terrestrial Radio Access) in the system, adopted and mixed request (HARQ automatically, Hybrid Auto automatic repeat request) technology is to obtain higher message transmission rate.

The basic process of HARQ technology is: whether receiving terminal at first checks this packet correct after receiving packet, if it is correct, to a transmitting terminal feedback successful respond ACK (Acknowledgement) signal, transmitting terminal can continue to send next data packet signal after receiving ACK; If incorrect, then reply the NACK signal to failure of transmitting terminal feedback; Transmitting terminal retransmits after receiving NACK, transmits the new check digit information of identical packet or this packet, and rule goes on always according to this, till transmitting terminal is received ack signal or reached maximum retransmission.

In the E-UTRA system, the up-downgoing transfer of data all adopts the HARQ technology.The ascending HARQ process is: the transmission base station is to the descending ACK/NACK answer signal of user UE feedback in Physical HARQ Indicator Channel (PHICH, Physical HARQ Indicating channel).Descending HARQ process is: the middle UE of transmission of the control channel (PUCCH, Physical Uplink Control Channel) of going physically is to the uplink ACK/NACK answer signal of base station feedback.Here, the part resource of transmitting uplink ACK/NACK among PHICH and the PUCCH is referred to as the ACK/NACK channel.

In a Transmission Time Interval, the ACK/NACK that has a plurality of upstream or downstream simultaneously replys the downlink or uplink packet of corresponding different user respectively.System need reserve the ACK/NACK channel resource, and sets the allocation rule of ACK/NACK channel, with the answer signal of transmission different user.

The ack channel resource that communication system is reserved should satisfy the demand of current maximum possible dispatched users quantity by the decision of system call number of users.In the E-UTRA system, at present can be according to the semi-static adjustment ack channel of dispatched users situation quantity, and notify the user by high-level signaling.

In the prior art, the indicating mode of ACK/NACK channel allocation mainly contains two kinds:

(1) each user of signaling display notification is the ACK/NACK channel designator of its distribution.The mode of display notification can take bigger signaling consumption.

(2) the ACK/NACK channel is corresponding with user's data channel or control channel implicit expression, when the user knew data channel resource or its control channel resource location or sequence number, promptly correspondence went out the ACK/NACK channel designator for its distribution.

Wherein, a kind of mode of implicit expression correspondence is: with ACK/NACK channel and Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) correspondence.Specifically, can adopt ACK/NACK channel and control channel unit (CCE, Control Channel Element) correspondence.Above-mentioned CCE is the component units of PDCCH resource, in the transmission/and the PDCCH of down dispatch information constitutes by CCE.In the E-UTRA system, PDCCH can be by 1,2, and 4 or 8 CCE form, the PDCCH encoder bit rate that different CCE numbers is corresponding different.

In the communication process, by among the PDCCH of the form of the PDCCH of base station decision dispatched users and selected format which; Be that several and which CCE is combined into PDCCH.The base station can comprise the process that CCE distributes to the PDCCH (being PDCCH waiting for transmission) of dispatched users, available CCE is combined into all candidate PDCCH (PDCCH candidates) of various forms, and the PDCCH that selects required form from the PDCCH that all are combined into distributes to dispatched users and controls the signaling transmission.

The user carried out blind Detecting to candidate PDCCH, up to the PDCCH that detects oneself before receiving its PDCCH.Therefore,, can guarantee that the ACK/NACK channel of different user does not bump, guarantee that promptly different user uses different ACK/NACK channels by the ACK/NACK channel is corresponding with CCE implicit expression.

In the communication system, system generally adopts dynamic dispatching, resource-sharing, and different dispatched users quantity and scheduled users constantly can change.For example, the E-UTRA system is in order to improve resource utilization, and the resource that is used for the control channel transmission is dynamically adjusted: indicate the OFDM symbol numbers N of each subframe inner control channel occupancy by signaling, wherein N is smaller or equal to 3.Simultaneously, the quantity of CCE also changes with the variation of N, and each subframe structure of the PDCCH that CCE forms also has nothing in common with each other.

A kind of concrete ACK/NACK channel method corresponding with CCE is corresponding one by one in the prior art, and promptly a CCE is fixing corresponding with an ACK/NACK, the ACK/NACK channel that different CCE are corresponding different.When user's PDCCH takies a plurality of CCE, specify this user to use the ACK/NACK channel of the minimum or maximum CCE correspondence of sequence number wherein.With reference to figure 1, be ACK/NACK channel and CCE schematic diagram one to one in the prior art.Among Fig. 1, system is current 11 CCE, then needs to reserve 11 ACK/NACK channels, and both sequence numbers are corresponding one by one, and designated user uses the ACK/NACK channel of the CCE correspondence of sequence number minimum in its control channel.

The present inventor finds: in the communication process, the quantity of CCE is dynamic change, and the ACK/NACK channel quantity is according to the semi-static adjustment of dispatched users quantity.Like this, ACK/NACK channel reservation quantity must could satisfy requirement one to one greater than the maximum quantity of the CCE that is used to be combined into all candidate PDCCH in the system.Yet the PDCCH that distributes to a user may be made up of a plurality of CCE, and promptly a PDCCH can be corresponding with a plurality of ACK/NACK channels, and the user only uses one of them ACK/NACK channel.Therefore, the actual ACK/NACK channel quantity that uses generally can be less than the quantity of CCE in the system, the ACK/NACK channel quantity that the ACK/NACK channel quantity of reservation can use more than reality usually, thus cause a large amount of wastes of communication channel resources.With reference to figure 1, UE_1 is respectively the 0th, 4,6,8,9,10 ACK/NACK channel to the ACK/NACK channel of the actual use of UE_6, and channel 1-3,5,7 ACK/NACK channels of all the other reservations have all been wasted.

Summary of the invention

The embodiment of the invention provides a kind of control channel unit CCE distribution method and corresponding ACK/NACK channel allocation indicating means and relevant apparatus, realizes that CCE and ACK/NACK channel are recessive corresponding, reduce the waste of communication channel resources.

A kind of Physical Downlink Control Channel distribution method that the embodiment of the invention provides comprises:

Physical downlink control channel PDCCH is divided into two groups according to predetermined PDCCH form;

Be respectively every group of PDCCH and set the fixing initial CCE of a conduct that can distribute among the control channel unit CCE;

Respectively from described fixing initial CCE, for every group of PDCCH among described two groups of PDCCH distributes CCE.

A kind of ACK/NACK channel allocation indicating means that the embodiment of the invention provides comprises:

PDCCH is divided into two groups according to predetermined PDCCH form;

Be respectively described two groups of PDCCH and set the fixing initial CCE of a conduct that can distribute among the CCE;

From described fixing initial CCE, be every group of PDCCH distribution CCE of described two groups of PDCCH respectively;

According to the corresponding relation of the PDCCH that sets, indicate the ACK/NACK channel of distributing to dispatched users with the ACK/NACK channel of reservation.

The another kind of ACK/NACK channel allocation indicating means that the embodiment of the invention provides comprises:

For the PDCCH that gives dispatched users to be transmitted,, distribute CCE to give described each PDCCH successively according to the form order from big to small of each PDCCH;

When distributing CCE according to the ascending order of CCE sequence number, the corresponding relation of PDCCH and ACK/NACK channel is:

ACK_Index＝CCE_Index/N _{CCE_per_PDCCH}；

When distributing CCE according to the sequence number descending of CCE, the corresponding relation of PDCCH and ACK/NACK channel is:

ACK_Index＝(N _CCE-CCE_Index)/N _{CCE_per_PDCCH}；

Wherein, ACK_Index represents the ACK/NACK channel designator of this PDCCH correspondence, 0≤ACK_Index≤N _ACK-1, N _ACKThe ack channel quantity that expression is reserved; N _{CCE_per_PDCCH}The form of representing this PDCCH; CCE_Index represents among this PDCCH the sequence number of the CCE that distributes at first, 0≤CCE_Index≤N _CCE-1;

According to the corresponding relation of described PDCCH and ACK/NACK channel, the ACK/NACK channel of dispatched users is distributed in indication.

A kind of PDCCH distributor that the embodiment of the invention provides comprises:

Grouped element is divided into two groups with PDCCH according to the PDCCH form;

Allocation units are used for CCE is distributed to two groups of PDCCH; Be respectively described two groups of PDCCH and set the fixing initial CCE of a conduct that can distribute among the CCE; Respectively from the initial CCE of said fixing, for every group of PDCCH distributes CCE.

A kind of ACK/NACK channels transmit device that the embodiment of the invention provides comprises:

Corresponding informance provides the unit, is used for PDCCH is divided into two groups according to form, and the corresponding relation of the ACK/NACK interchannel of two groups of PDCCH and reservation is provided;

The ACK/NACK channel is known the unit, is used for providing according to described corresponding informance the corresponding relation of the ACK/NACK interchannel of PDCCH that the unit provides and reservation, knows the corresponding ACK/NACK channel that distributes by PDCCH assignment information or detected PDCCH; ACK/NACK channels transmit unit is used for that the ACK/NACK information mapping is known in described ACK/NACK channel that the unit is known on the ACK/NACK channel of distribution and launches.

A kind of base station that the embodiment of the invention provides comprises PDCCH distributor, dispatching device, mapping device, ACK/NACK channels transmit device, ACK/NACK channel receiver;

Described PDCCH distributor links to each other with described dispatching device, described mapping device respectively, described dispatching device is used for determining which user of scheduling and PDCCH thereof, send to described PDCCH distributor, the CCE that described PDCCH distributor is used for distributing sends to mapping device and is mapped to and is launched by antenna after the Physical Resource Block;

Described PDCCH distributor comprises allocation units and grouped element; Described grouped element is used to provide the PDCCH grouping information; Described allocation units are used to distribute CCE to give the physical downlink control channel PDCCH of dispatched users waiting for transmission, form order from big to small according to each PDCCH is distributed assignable CCE successively, maybe all assignable CCE are combined into all candidate PDCCH of different-format according to ad hoc rules, the reallocation candidate PDCCH give dispatched users, and described form refers to that this PDCCH comprises the quantity of CCE;

Described ACK/NACK channels transmit device, be used for specific corresponding relation according to ACK/NACK channel and PDCCH, know the corresponding ACK/NACK channel that distributes by the PDCCH assignment information, the ACK/NACK channel Mapping is transmitted to terminal on the ACK/NACK channel that distributes;

Described ACK/NACK channel receiver, be used for specific corresponding relation according to ACK/NACK channel and PDCCH, know the corresponding ACK/NACK channel that distributes by the PDCCH assignment information, the ACK/NACK information that receiving terminal sends from the ACK/NACK channel that distributes.

A kind of terminal that the embodiment of the invention provides comprises and separates mapping device, blind Detecting device, ACK/NACK channels transmit device, ACK/NACK channel receiver;

The described mapping device of separating links to each other with described blind Detecting device, is used for that terminal is received signal and separates mapping and obtain signal on each CCE, and the signal on each CCE is sent to the blind Detecting device;

The blind Detecting device links to each other with ACK/NACK channels transmit device with the ACK/NACK channel receiver respectively, be used for that the signal on each CCE that obtains is carried out blind Detecting and obtain base station assigns and give own PDCCH, and the serial number information of the CCE that the PDCCH of distribution is comprised sends to ACK/NACK channel receiver and ACK/NACK channels transmit device;

The ACK/NACK channel receiver, the sequence number that the CCE that the PDCCH of the distribution that provides according to the blind Detecting device comprises is provided, the corresponding relation that reaches the ACK/NACK interchannel of PDCCH and reservation is known the ACK/NACK channel of distribution, and the ACK/NACK information mapping is transmitted to the base station on the ACK/NACK channel that distributes;

ACK/NACK channels transmit device, the sequence number that the CCE that the PDCCH of the distribution that provides according to the blind Detecting device comprises is provided, and the corresponding relation of the ACK/NACK interchannel of PDCCH and reservation is known the ACK/NACK channel of distribution, the ACK/NACK information that sends from the ACK/NACK channel reception base station of distributing.

In the technical scheme that the embodiment of the invention provides, PDCCH is divided into two groups according to predetermined PDCCH form; Be respectively described two groups of PDCCH and set the fixing initial CCE of a conduct that can distribute among the CCE; From described fixing initial CCE, be every group of PDCCH distribution CCE of described two groups of PDCCH respectively; According to the corresponding relation of the PDCCH that sets, indicate the ACK/NACK channel of distributing to dispatched users with the ACK/NACK channel of reservation.In emitting side,, distribute CCE successively according to the embodiment of the invention according to the quantity order from big to small of the CCE that comprises among each PDCCH for PDCCH waiting for transmission; The ACK/NACK interchannel that described assignable CCE and system reserve satisfies specific corresponding relation, and the quantity of the ACK/NACK channel of described system reservation is less than the maximum of described assignable CCE; At receiver side, receiver side obtains the sequence number of the ACK/NACK channel of this receiver side according to the sequence number of the CCE that distributes at first among the CCE quantity that comprises among the PDCCH of oneself, the PDCCH.Can realize the recessiveness indication of ACK/NACK channel according to the embodiment of the invention, and the ACK/NACK channel quantity of reserving is less than CCE quantity, the waste that reduced channel resource.

Description of drawings

Fig. 1 is an ACK/NACK channel and CCE schematic diagram one to one in the prior art;

Fig. 2 is the tree schematic diagram of ACK/NACK channel and CCE implicit expression correspondence in the embodiment of the invention one;

Fig. 3 is a CCE distribution method flow chart in the embodiment of the invention two;

Fig. 4 is the schematic diagram of ACK/NACK channel in the present invention's two application examples one and CCE implicit expression correspondence;

Fig. 5 is the schematic diagram of another kind of ACK/NACK channel in the application example two of the present invention and CCE implicit expression correspondence;

Fig. 6 is the schematic diagram of ACK/NACK channel in the application example six of the present invention and CCE implicit expression correspondence;

Fig. 7 is the schematic diagram of ACK/NACK channel in the application example three of the present invention first group and CCE implicit expression correspondence;

Fig. 8 is the schematic diagram of ACK/NACK channel in the application example three of the present invention second group and CCE implicit expression correspondence;

Fig. 9 is the schematic diagram of ACK/NACK channel in the application example four of the present invention first group, second group and CCE implicit expression correspondence;

Figure 10 is first group, second group the ACK/NACK channel and the schematic diagram of CCE implicit expression correspondence in the application example five of the present invention;

Figure 11 is in the embodiment of the invention four, first group, second group ACK/NACK channel and the schematic diagram of CCE implicit expression correspondence;

Figure 12 is in the embodiment of the invention four, first group, second group ACK/NACK channel and the schematic diagram of CCE implicit expression correspondence;

Figure 13 is the schematic diagram of CCE grouping in the embodiment of the invention five;

Figure 14 is the schematic diagram when there is overlapping in the CCE grouping in the embodiment of the invention five;

Figure 15 is a kind of CCE distributor structure chart in the embodiment of the invention six;

Figure 16 is the structural representation of a kind of ACK/NACK channels transmit device in the embodiment of the invention six;

Figure 17 is the structural representation of a kind of ACK/NACK channel receiver in the embodiment of the invention six.

Embodiment

Following various embodiments of the present invention are described based on the E-UTRA system, and the method for ACK/NACK channel indication is provided, and the method for each ACK/NACK channel indication is made of the corresponding method of PDCCH distribution method and ACK/NACK channel and PDCCH.

Embodiment one

In an embodiment of the invention, the corresponding method of ACK/NACK channel and PDCCH comprises following step:

Step S101:, distribute available CCE successively according to the form order from big to small of each PDCCH for the PDCCH of dispatched users.

Described form refers to that specifically this PDCCH comprises the quantity of CCE.For example, in the E-UTRA system, PDCCH may comprise 1,2,4 or 8 CCE, and correspondingly, form also has 1,2,4,8 such 4 kinds.Above-mentioned available CCE is: default can be used to transmit the CCE of the PDCCH of uplink scheduling signaling, or default can be used to transmit the CCE of the PDCCH of descending scheduling signaling, or all PDCCH CCE that can use.

Particularly, be exactly to be the big PDCCH distribution CCE of form earlier, the PDCCH that wherein form is identical distributes adjacent CCE.For the subsequent descriptions convenience, with assignable CCE layout sequence number, according to sequence number ascending order or the descending distribution CCE of CCE.

Step S102: the specific corresponding relation that is established as the ACK/NACK interchannel of CCE that PDCCH distributes and reservation.

This specific corresponding relation is:

If ascending order is distributed CCE, then

ACK_Index=CCE_Index/N _{CCE_per_PDCCH}Formula one

If descending distributes CCE, then

ACK_Index=(N _CCE-CCE_Index)/N _{CCE_per_PDCCH}Formula two

Wherein, N _ACKThe ack channel quantity that expression is reserved, ACK_Index represents the ACK/NACK channel designator of this PDCCH correspondence, 0≤ACK_Index≤N _ACK-1; N _{CCE_per_PDCCH}The form of representing this PDCCH; CCE_Index represents among this PDCCH the sequence number of the CCE that distributes at first, 0≤CCE_Index≤N _CCE-1, N _CCERepresent the quantity of CCE in the distributable CCE set, hereinafter above-mentioned symbolic significance is identical, does not give unnecessary details.

According to the above-mentioned rule of correspondence, make that the sequence number of ACK/NACK channel of the PDCCH correspondence that form is identical is continuous, like this, when having the big PDCCH transmission of a plurality of forms, reduced the ACK/NACK channel quantity that can be used.

User terminal according to the above-mentioned CCE and the corresponding relation of ACK/NACK channel that is that PDCCH distributes, is promptly known the ACK/NACK channel of distributing to oneself use after blind check measures the PDCCH of oneself.

With reference to figure 2, the method for above-mentioned ACK/NACK channel and CCE correspondence can be expressed as tree.Above-mentioned formula one usefulness tree is represented to be specially: the nodal scheme presentation format of layer 4 is 8 the pairing ACK/NACK channel designator of PDCCH; The nodal scheme presentation format of layer 3 is 4 the pairing ACK/NACK channel designator of PDCCH; The nodal scheme presentation format of layer 2 is 2 the pairing ACK/NACK channel designator of PDCCH; The nodal scheme presentation format of layer 1 is 1 the pairing ACK/NACK channel designator of PDCCH.

Among Fig. 2,16 CCE are arranged, 8 ACK/NACK channels of the current reservation of system are if there is 4 users' PDCCH to take the 0th～7 respectively, 8～11,12～13,14～15 CCE are then according to tree, the ACK/NACK channel designator of these 4 user's correspondences is respectively 0,2,6,7.

Here, it is pointed out that when reserving the ACK/NACK channel in the practical communication process generally is system initialization and finish, need in communication process, not on-the-fly modify.That is, system can be according to the enough ACK/NACK channel resources of the fixing reservation of greatest requirements.More excellent, when the ACK/NACK channel of only some reservation is used, residual A CK/NACK channel resource can be used for the transfer of data of other physical channel.

Above the result as can be seen, by the corresponding method of above-mentioned PDCCH in the present embodiment and ACK/NACK channel, can so that the quantity of ACK/NACK channel of reservation less than the possible maximum quantity of CCE in the system, thereby reduced the waste of the communication resource.

Embodiment two

In the method for the foregoing description one, when two PDCCH forms that take adjacent C CE are inequality, the situation of the ACK/NACK channel of reservation can appear still wasting.For example, if there is 3 users' PDCCH to take the 0th～7,8,9 CCE respectively among Fig. 2, so according to above-mentioned formula one or above-mentioned tree, the ACK/NACK channel designator of these 3 user's correspondences is respectively 0,8,9.Like this, wasted 1-7 the ACK/NACK channel resource of reserving.In another embodiment of the present invention, on the basis of the foregoing description one, utilize PDCCH is divided into groups, further reduce the waste of the communication resource.

With reference to figure 3, the CCE distribution method that provides in the present embodiment comprises the steps:

Step S301, PDCCH is divided into two groups, the PDCCH form among first group of PDCCH and the second group of PDCCH is inequality.

For convenience, hereinafter first group of PDCCH is designated as PG ₁, second group of PDCCH is designated as PG ₂PG ₁And PG ₂In the PDCCH form that comprises can preestablish by system, in communication process, immobilize; Also can be according to the dynamic or semi-static variation of the ACK/NACK channel quantity of assignable CCE quantity and reservation.

Step S302, set a fixing initial CCE in the available CCE set respectively at two groups of PDCCH.

CCE in the CCE set is: default can be distributed to the CCE of the PDCCH of transmission uplink scheduling signaling, or default can distribute to the CCE of the PDCCH of transmission descending scheduling signaling, or all PDCCH CCE that can use.

N hereinafter _CCEThe quantity of expression CCE set CCE, CCE_a represents that sequence number is the CCE of a, with S1, S2 represent respectively CCE in gathering with respect to PG ₁, PG ₂The sequence number of dividing the fixing initial CCE of timing, 0≤S1≤N _CCE-1,0≤S2≤N _CCE-1, and S1＜S2.

Step S303, begin according to particular order CCE to be distributed to above-mentioned two groups of PDCCH from CCE_S1, CCE_S2 respectively, this specific order is used to guarantee that the CCE that two groups of PDCCH distribute has nothing in common with each other.

Concrete, first group of PDCCH begins to distribute from CCE_S1, and second group of PDCCH begins to distribute from CCE_S2.This particular order is meant: for the different PDCCH in each group, the quantity descending order of the CCE that comprises according to each PDCCH successively distributes CCE; First group and second group are respectively according to the ascending order of the sequence number of CCE or the order assignment CCE of descending.Concrete, above-mentioned first group of sequence number ascending order or descending according to CCE distributes CCE, and simultaneously, second group also can be distributed CCE according to sequence number ascending order or the descending of CCE.

Easy for describing, hereinafter represent among the concrete PDCCH sequence number of the CCE that distributes at first, 0≤CCE_Index≤N with CCE_Index _CCE-1.Distribute the PDCCH of CCE for above-mentioned by ascending order, the sequence number of the CCE of the sequence number minimum that CCE_index is assigned to for this PDCCH; For pressing the PDCCH that descending distributes CCE, the sequence number of the CCE of the sequence number maximum that CCE_index is assigned to for this PDCCH.For example, if set S1=0, S2=N _CCE-1, then, begin ascending order from CCE_0 and distribute PG ₁Employed CCE is from CCE_N _CCE-1 beginning descending distributes PG ₂Employed CCE.

And, the CCE distribution method that present embodiment provides also comprises the foundation of the corresponding relation of ACK/NACK channel and CCE, in above-mentioned steps S301, can distribute to the CCE that respectively organizes PDCCH, with the ACK/NACK interchannel that system reserves, satisfy specific corresponding relation, be specially:

Work as A ₁＜A ₂, and first group of PDCCH sequence number ascending order of pressing CCE is when distributing CCE, and then corresponding relation is

ACK_Index＝A ₁+(CCE_Index-S1)/N _{CCE_per_PDCCH}；

Work as A ₁＜A ₂, and the sequence number descending that first group of PDCCH presses CCE distributes CCE, and then corresponding relation is

ACK_Index＝A ₁+(S1-CCE_Index)/N _{CCE_per_PDCCH}；

Work as A ₁＜A ₂, and the sequence number ascending order that second group of PDCCH presses CCE distributes CCE, and then corresponding relation is

ACK_Index＝A ₂-(CCE_Index-S2)/N _{CCE_per_PDCCH}；

Work as A ₁＜A ₂, and the sequence number descending that second group of PDCCH presses CCE distributes CCE, and then corresponding relation is

ACK_Index＝A ₂-(S2-CCE_Index)/N _{CCE_per_PDCCH}；

Work as A ₁＞A ₂, and the sequence number ascending order that first group of PDCCH presses CCE distributes CCE, and then corresponding relation is

ACK_Index＝A ₁-(CCE_Index-S1)/N _{CCE_per_PDCCH}；

Work as A ₁＞A ₂, and the sequence number descending that first group of PDCCH presses CCE distributes CCE, and then corresponding relation is

ACK_Index＝A ₁-(S1-CCE_Index)/N _{CCE_per_PDCCH}；

Work as A ₁＞A ₂, and the sequence number ascending order that second group of PDCCH presses CCE distributes CCE, and then corresponding relation is

ACK_Index＝A ₂+(CCE_Index-S2)/N _{CCE_per_PDCCH}；

Work as A ₁＞A ₂, and the sequence number descending that second group of PDCCH presses CCE distributes CCE, and then corresponding relation is

ACK_Index＝A ₂+(S2-CCE_Index)/N _{CCE_per_PDCCH}；

Wherein, N _ACKThe ack channel quantity that expression is reserved; ACK_Index represents the ACK/NACK channel designator of user's correspondence, 0≤ACK_Index≤N _ACK-1; N _{CCE_per_PDCCH}The form of representing this PDCCH; CCE_Index represents among this PDCCH the sequence number of the CCE that distributes at first, 0≤CCE_Index≤N _CCE-1; A ₁The initial ACK/NACK channel designator of representing first group of PDCCH correspondence, 0≤A ₁≤ N _ACK-1; A ₂The initial ACK/NACK channel designator of representing second group of PDCCH correspondence, 0≤A ₂≤ N _ACK-1, A ₁≠ A ₂

Equally, the above-mentioned rule of correspondence makes respectively that in two groups the sequence number of ACK/NACK channel of the PDCCH correspondence that form is identical is continuous, like this, when having the big PDCCH transmission of a plurality of forms, has reduced the ACK/NACK channel quantity that can be used.

General, A ₁, A ₂Value can preestablish by system, perhaps dynamically change according to the variation of CCE quantity in the communication process.For example, can be by setting quantity and the A of CCE ₁, A ₂The corresponding relation of value realize.For example, be used for the OFDM symbol numbers N of PDCCH transmission in the E-UTRA system by the indication of PCFICH channel, N＞=3, the quantity of the value decision CCE of N then can be set when N=1 A ₁=0, $A_2=\frac{1}{3}{N}_{\mathrm{ACK}};$ When N=2, A ₁=0, $A_2=\frac{2}{3}{N}_{\mathrm{ACK}};$ When N=2, A ₁=0, A ₂=N _ACK, or set according to other actual ACK/NACK channel quantity that can use.

This change A ₁, A ₂Concrete value, can select to limit the scope of the actual ACK/NACK channel that can be corresponding of PDCCH channel, like this, can guarantee that the ACK/NACK channel that is not used is complete and fixing, be beneficial to other physical channel and use this part resource.

Equally, user terminal according to the corresponding relation of above-mentioned PDCCH distribution method and CCE and ACK/NACK channel, is promptly known and is distributed to the ACK/NACK channel that oneself uses after blind check measures the PDCCH of oneself.

The foregoing description supports the ACK/NACK channel quantity of reserving to be less than the situation of CCE quantity on the one hand; And under the semi-static situation of change of ACK/NACK channel quantity, provide the unified CCE rule corresponding with the ACK/NACK channel in the dynamic change of CCE quantity.On the other hand by PDCCH to be allocated is divided into two groups, begin to distribute the employed CCE of PDCCH of different-format respectively from the certain location of CCE sequence number especially two original positions, make and to take but the actual ack channel that uses can also be used by other user's PDCCH by the PDCCH that comprises a plurality of CCE, like this, under the situation of identical CCE number and ack channel number, can dispatch more user, reduce the waste of CCE and ack channel resource.

For making the foregoing description and beneficial effect more clear, carry out concrete illustrating below.

Application example one.

With reference to figure 4, in emitting side:

Currently be used to form the PDCCH of different user by 18 CCE, the ack channel that system reserves is 10, and the form of PDCCH can be 1,2,4,8.Be N _CCE=18, N _ACK=10, N _{CCE_per_PDCCH}=1,2,4, or 8.

N _{CCE_per_PDCCH}＞1 PDCCH forms PG ₁, begin ascending order from CCE_0 and distribute CCE; N _{CCE_per_PDCCH}=1 PDCCH forms PG ₂, begin descending from CCE_17 and distribute CCE.PG ₁, PG ₂Corresponding initial ACK/NACK channel designator is respectively A ₁=0, A ₂=9.

System is current 5 dispatched users UE_1, UE_2, UE_3, UE_4, UE_5, and the form of each user PDCCH is respectively 8,4,2,1,1.

So, the PDCCH of UE_1, UE_2, UE_3 belongs to PG ₁, the PDCCH of UE_4, UE_5 belongs to PG ₂

According to above-mentioned CCE allocation rule, network side for the CCE allocation result of PDCCH is: the PDCCH of UE_1 be assigned to CCE_0, CCE_1 ... CCE_7, the PDCCH of UE_2 be assigned to CCE_8, CCE_9 ... CCE_11, the PDCCH of UE_3 is assigned to CCE_12, CCE_13, the PDCCH of UE_4 is assigned to CCE_16, and the PDCCH of UE_5 is assigned to CCE_17.

At receiver side:

The user is according to detected oneself the form of PDCCH, and the sequence number of the CCE that distributes at first among this PDCCH according to the implicit expression rule of correspondence of aforementioned CCE and ACK/NACK channel, obtains the ACK/NACK channel designator of each user's distribution.Specifically, know the form of this PDCCH, promptly know the grouping that this PDCCH is affiliated.The result is:

ACK/NACK channel designator ACK_Index=0+ (0-0)/8=0 that UE_1 takies

ACK/NACK channel designator ACK_Index=0+ (8-0)/4=2 that UE_2 takies

ACK/NACK channel designator ACK_Index=0+ (12-0)/2=6 that UE_3 takies

The ACK/NACK channel that UE_4 takies is sequence number ACK_Index=9-(17-16)/1=8

The ACK/NACK channel that UE_5 takies is sequence number ACK_Index=9-(17-17)/1=9

With reference to figure 4, at above-mentioned example one,, take CCE_14, CCE_15 if increase a dispatched users UE_6 again, UE_6 can obtain its corresponding ACK_Index=14/2=7 so.Real-time mode of the present invention as can be seen can be dispatched more user under the situation of identical CCE number and ack channel number, reduce the waste of CCE and ack channel resource.

Application example two,

With reference to figure 5, in emitting side:

Default N _{CCE_per_PDCCH}＞4 PDCCH forms PG ₁, begin ascending order from CCE_0 and distribute CCE; N _{CCE_per_PDCCH}＜=4 PDCCH forms PG ₂, begin descending from CCE_17 and distribute CCE.Then, PG ₁In comprise the PDCCH of UE_1, PG ₂In comprise the PDCCH of UE_2, UE_3, UE_4, UE_5.

The ACK/NACK channel quantity of reserving in this example is N _ACK=9.For the PDCCH of 5 UE in the above-mentioned example one distributes the situation of CCE be:

The PDCCH of UE_1 is assigned to CCE_0, CCE_1......CCE_7; The PDCCH of UE_2 is assigned to CCE_17, CCE_16......CCE_14, and the PDCCH of UE_3 is assigned to CCE_13, CCE_12, and the PDCCH of UE_4 is assigned to CCE_10, and the PDCCH of UE_5 is assigned to CCE_10.

At receiver side, the user obtains the ACK/NACK channel designator that each user distributes according to the implicit expression rule of correspondence of aforementioned CCE and ACK/NACK channel, and the result is:

The ACK/NACK channel designator ACK_Index=0 that UE_1 takies

The ACK/NACK channel designator ACK_Index=8 that UE_2 takies

The ACK/NACK channel designator ACK_Index=6 that UE_3 takies

The ACK/NACK channel designator ACK_Index=1 that UE_4 takies

The ACK/NACK channel designator ACK_Index=2 that UE_5 takies

Can see that this example two is with respect to example one, though system has only reserved 9 ACK/NACK channels, two users' ACK/NACK channel collision can not appear in receiver side.4 PDCCH below the CCE are divided into PG ₂, the ACK/NACK channel wastage that has caused when having avoided the control channel of 8 CCE and 4 CCE to take continuous CCE, for example sequence number is the situation that 1 ack channel can't be used in the example one.

Embodiment three

In another embodiment, based on aforementioned PDCCH is divided into two groups, according to specific rule correspondence and the method for obtaining the ACK/NACK channel, the method corresponding with the ACK/NACK channel to CCE is further improved.In the present embodiment, comprising:

S501, available CCE is combined into all candidate PDCCH of various forms according to ad hoc rules.This step comprises:

S501a, PDCCH is divided into two groups, group technology is specially:

In the possible form of PDCCH (CCE quantity), select specific form f _i, f _I+1, this f _i, f _I+1Satisfy

Perhaps determine by system, wherein, with set { f ₁, f ₂, f ₃... } and the possible form of expression PDCCH, f ₁＜f ₂＜f ₃＜...; With N _{CCE_per_PDCCH}〉=f _I+1PDCCH be grouped into PG ₁With N _{CCE_per_PDCCH}≤ f _iPDCCH be grouped into PG ₂Aforementioned mathematic sign

Expression is less than the maximum integer of a.

S501b is combined into all candidate PDCCH of various forms with available CCE, and concrete compound mode is:

PG ₁In PDCCH, form is f _I+1, f _I+2... PDCCH be respectively by continuous f _I+1, f _I+2... individual CCE is combined into.For PG ₂In PDCCH, form is f _i... f ₁PDCCH be by continuous f _i... f ₁The PDCCH that individual CCE is combined into.Because f _iN _ACK＜N _CCE, therefore, all possible form is f _iPDCCH, can not take all CCE.

Carry out PDCCH and divide timing, can fix initial CCE at that two groups of PDCCH set respectively in the assignable CCE set.Select to distribute from all candidate PDCCH according to certain order.

CCE in the CCE set is: default can be used to transmit the CCE of the PDCCH of uplink scheduling signaling, or default can be used for transmitting the CCE of the PDCCH of descending scheduling signaling, or all PDCCH CCE that can use.

N hereinafter _CCEThe quantity of expression CCE set CCE, CCE_a represents that sequence number is the CCE of a, with S1, S2 represent respectively CCE in gathering with respect to PG ₁, PG ₂The sequence number of dividing the fixing initial CCE of timing, 0≤S1≤N _CCE-1,0≤S2≤N _CCE-1.

The ACK/NACK interchannel that S502, PDCCH and system reserve satisfies specific corresponding relation, in the present embodiment:

For PG ₁In PDCCH, above-mentioned specific corresponding relation is: sequence number is S ₁, S ₁+ f _I+1, S ₁+ 2f _I+1, S ₁+ 3f _I+1..., S ₁+ (N _ACK-1) f _I+1CCE be A with sequence number successively ₁, A ₁+ 1, A ₁+ 2 ..., A ₁+ N _ACK-1 ACK/NACK channel is corresponding.PG ₁In form be f _I+1, f _I+2... the ACK/NACK channel of correspondence of PDCCH get the ack channel of the CCE correspondence that comprises among this PDCCH.If have a plurality of, can get the label minimum or maximum CCE correspondence ACK/NACK channel.Described specific corresponding relation can be expressed as:

ACK_Index＝A ₁+(CCE_Index-S1)/f _i+1；

Wherein, CCE_Index represents the sequence number of the CCE corresponding with the ACK/NACK channel.

For PG ₂In PDCCH, above-mentioned specific corresponding relation is: according to CCE take the order, with PG ₂Middle form is f _iThe initial CCE of PDCCH carry out corresponding with following ACK/NACK channel successively: first priority is impossible be f by form among first group of PDCCH _I+1The corresponding ACK/NACK channel that uses of PDCCH, second priority is impossible be f by form among first group of PDCCH _I+2The corresponding ACK/NACK channel that uses of PDCCH, but do not comprise that the form that takies this CCE is f _I+2The ACK/NACK channel of PDCCH channel correspondence, the 3rd priority is impossible be formatted as f _I+3The ACK/NACK channel that uses of PDCCH, but do not comprise that the form that takies this CCE is f _I+3The ACK/NACK channel of PDCCH channel correspondence, recursion successively, N priority is impossible be formatted as f _I+NThe ACK/NACK channel that uses of PDCCH, but do not comprise that the form that takies this CCE is f _I+NThe ACK/NACK channel of PDCCH channel correspondence, wherein N is a positive integer; And, can not corresponding PG ₂In prior to the ACK/NACK channel of the CCE correspondence of its distribution.Wherein, in each priority, can be corresponding if any a plurality of ACK/NACK channels, then can select one of them, for example work as PG ₂When taking CCE, select the ACK/NACK channel of the CCE correspondence of sequence number maximum, work as PG according to ascending order ₂When taking CCE, select the ACK/NACK channel of the CCE correspondence of sequence number minimum according to descending.

Wherein, when carrying out taking of CCE, be S with sequence number according to CCE sequence number ascending order ₂, S ₂+ f _i, S ₂+ 2f _i, S ₂+ 3f _i..., S ₂+ (N _ACK-1) f _iCCE corresponding with the ACK/NACK channel successively according to above-mentioned corresponding relation; When taking CCE, be S with sequence number according to CCE numeric order descending ₂, S ₂-f _i, S ₂-2f _i, S ₂-3f _i..., S ₂-(N _ACK-1) f _iCCE corresponding with the ACK/NACK channel successively according to above-mentioned corresponding relation.

PG ₂In form be f _iThe ACK/NACK channel of correspondence of PDCCH get the ack channel of the CCE correspondence that comprises among this PDCCH.

When carrying out taking of CCE, be S with other sequence number according to CCE sequence number ascending order ₂+ kf _i+ 1, S ₂+ kf _i+ 2 ..., S ₂+ (k+1) f _i-1 CCE and sequence number are S ₂+ kf _iThe corresponding identical ACK/NACK channel of CCE; When carrying out taking of CCE, be S with other sequence number according to CCE sequence number ascending order ₂-kf _i-1, S ₂-kf _i-2 ..., S ₂-(k+1) f _i+ 1 CCE and sequence number are S ₂-kf _iThe corresponding identical ACK/NACK channel of CCE, wherein, k=0,1 ... N _ACK-1Then form is f _I-1, f _I-2... the ACK/NACK channel of PDCCH correspondence be the ACK/NACK channel of its CCE correspondence that comprises.

Preferable, when CCE was combined into PDCCH, the CCE that distributes corresponding different ACK/NACK channels for the PDCCH of same format can avoid the corresponding identical ACK/NACK channel of PDCCH of same format like this and bumps.For example, when carrying out taking of CCE, can choose and be numbered S according to CCE sequence number ascending order ₂-kf _i, S ₂-kf _i-1 ..., S ₂-kf _i-f _I-1It is f that-1 CCE is combined into form _I-1PDCCH.Similarly, can choose S ₂-kf _i, S ₂-kf _i-1 ..., S ₂-kf _i-f _I-2It is f that-1 CCE is combined into form _I-2PDCCH.

All right, for PG ₂And PG ₁Comprise simultaneously and at PG ₁In carry out corresponding CCE with the ACK/NACK channel, at PG ₂In, the ACK/NACK channel that it is corresponding and it is at PG ₁Middle corresponding ACK/NACK channel is identical.To PG ₂In other CCE adopt above-mentioned corresponding relation to carry out corresponding with the ACK/NACK channel.

In fact the core concept of the rule of correspondence is the PDCCH (PG that form is little ₂In) and the big PDCCH (PG of form ₁In) can not carry out correspondence by corresponding ACK/NACK channel, divide timing thereby make NodeB carry out CCE, also can avoid corresponding ACK/NACK channel to bump in the situation of not promoting any restriction.

User terminal, after blind check measures the PDCCH of oneself, according to above-mentioned PDCCH distribution method, and the corresponding method of ACK/NACK channel and CCE, promptly be known as the ACK/NACK channel that oneself distributes.

Can also use the above-mentioned rule of correspondence to part A CK/NACK channel.For example, suppose f _MFor the PDCCH form of maximum (is that PDCCH at most can be by f _MIndividual CCE forms), then can be right

Individual ACK/NACK channel uses above-mentioned rule, PG ₂In by above-mentioned rule by corresponding

Individual ACK/NACK channel is according to above-mentioned PG ₁Rule carry out correspondence.For example, f in the previous examples _M=8,, then can be right

Individual ack channel uses above-mentioned rule, i.e. PG ₂In comprise

Channel outside the individual PDCCH channel.For not by the ACK/NACK channel of correspondence, according to PG ₁Rule carry out correspondence.That is, as Fig. 6, for PG ₂Only set C ₁₅～C ₁₀Corresponding 6 the ACK/NACK channels of these 6 CCE carry out according to above-mentioned rule.At this moment, there are ACK_0 and ACK_4 not to have correspondence, then use PG ₁Rule, C ₀Corresponding with ACK_0, C ₈Corresponding with ACK_4.

From said method as can be known, present embodiment can realize that the ACK/NACK channel quantity equals dispatched users and counts the recessive indication of ACK/NACK channel allocation under the situation, makes the ACK/NACK channel quantity that needs to reserve obviously reduce, and avoids the wasting of resources; Under specific ACK/NACK channel quantity situation, can guarantee that the CCE resource is used fully and do not caused the correspondence conflict of ACK/NACK channel, therefore, avoid the waste of CCE resource, but increased number of dispatched users.

For making top embodiment and beneficial effect more clear, be introduced with concrete example below.

Application example three,

This example is applied to the E-UTRA system, has 16 CCE, systems to reserve 8 ack channels in the CCE set, the form of PDCCH be 1,2,4,8}.

According to above-mentioned S501a, obtain f _i=1, f _I+1=2, also be PG ₁In to comprise form be 2,4,8 PDCCH, PG ₂In to comprise form be 1 PDCCH.

Get S according to above-mentioned S501a-S501b ₁=0, A ₁=0; S ₂=15, A ₂=7

With reference to figure 7, according to the rule of correspondence among the above-mentioned S502, for PG ₁In CCE set, above-mentioned specific corresponding relation is: sequence number is 0,2,4,6, the corresponding respectively sequence number of 8,10,12,14 CCE is 0,1,2,3,4,5,6,7 ACK/NACK channel.

PG wherein ₁In all possible form be that 2 the corresponding successively sequence number of PDCCH is 0,1,2,3 ...～7 ACK/NACK channel; All possible form is that 4 the corresponding successively sequence number of PDCCH is 0,2,4,6 ACK/NACK channel, and all possible form is that 8 the corresponding successively sequence number of PDCCH is 0,2,4,6 ACK/NACK channel.In Fig. 7, UE_1, UE_2, the PDCCH of UE_3 corresponding sequence number respectively are 0,4,6 ACK/NACK channel.

With reference to figure 8, according to the rule of correspondence among the above-mentioned S502, for PG ₂In CCE set, above-mentioned specific corresponding relation is: sequence number is 15,14,13,12 ..., 8 CCE is corresponding A CK/NACK channel in the following order successively: first priority, can not be by PG ₁Middle N _{CCE_per_PDCCH}The corresponding ACK/NACK channel that uses of=2 PDCCH, second priority, can not be by PG ₁Middle N _{CCE_per_PDCCH}The corresponding ACK/NACK channel that uses of=3 PDCCH, but do not comprise the N that takies this CCE _{CCE_per_PDCCH}=f _I+2The ACK/NACK channel of PDCCH channel correspondence, the 3rd priority, can not be by N _{CCE_per_PDCCH}The ACK/NACK channel that=4 PDCCH uses, but do not comprise the N that takies this CCE _{CCE_per_PDCCH}=f _I+3The ACK/NACK channel of PDCCH channel correspondence, recursion successively.Particularly,

For CCE_15:

The first priority ACK/NACK channel is ACK_7, then CCE_15 corresponding A CK_7:

That is, distribute to PG as CCE_15 ₂In behind the PDCCH of a CCE, PG ₁In form be that 2 PDCCH can not take CCE_14, CCE_15 again, and other CCE all can be assigned to form be 2 PDCCH, so ACK_7 there is no fear of by PG ₁In form be that 2 PDCCH is corresponding or take.

For CCE_14:

The ACK_7 of first priority is taken by CCE_15, thereby seeks second priority.

The second priority ACK/NACK channel is ACK_1, ACK_3, and ACK_5, then CCE_14 corresponding A CK_1:

That is PG, ₁Middle form is 4 PDCCH difference possibility corresponding A CK_0, ACK_2, ACK_4, ACK_6, ACK_1 then, ACK_3, ACK_5 are the channels that impossible be formatted as 4 PDCCH correspondence, can be taken by the PDCCH of 4 CCE of corresponding A CK_7 owing to CCE_14 again, therefore, in ACK_7 is not included in.Then with C ₁₄ACK_1 corresponding to the sequence number minimum in these three ACK/NACK channels;

For CCE_13:

The first priority ACK/NACK channel is ACK_6, then CCE_13 corresponding A CK_6:

Promptly work as CCE_13 and distribute to PG ₂In behind the PDCCH of a CCE, PG ₁In form be that 2 PDCCH can not take CCE_12, CCE_13 again, and other CCE all can be assigned to form be 2 PDCCH, so ACK_6 there is no fear of by PG ₁In form be that 2 PDCCH is corresponding or take.

In like manner, set the ACK/NACK channel of other CCE correspondence successively, corresponding result as shown in Figure 8.

Application example four,

This example also is applied to the E-UTRA system, and what this example and application example three were different is that system has reserved 4 ack channels.Other is identical: have the form of 16 CCE, PDCCH to be in the CCE set to be allocated 1,2,4,8}.

According to above-mentioned S5011, obtain f _i=2, f _I+1=4, PG so ₁In to comprise form be 4,8 PDCCH, PG ₂In to comprise form be 1,2 PDCCH.

Get S according to above-mentioned S5012-S5014 ₁=0, A ₁=0; S ₂=15, A ₂=3

With reference to figure 9, according to the rule of correspondence among the above-mentioned S502, for PG ₁In CCE set, above-mentioned specific corresponding relation is: sequence number is 0,4,8,12 CCE corresponding A CK_0 respectively, ACK_1, ACK_2, ACK_3.

Wherein, PG ₁In all possible form be 4 PDCCH corresponding A CK_0 successively, ACK_1, ACK_2, ACK_3; All possible form is 8 PDCCH corresponding A CK_0 successively, ACK_2;

With reference to figure 9, according to the rule of correspondence among the above-mentioned S502, for PG ₂In CCE set, above-mentioned specific corresponding relation is: sequence number is 15,14 CCE corresponding A CK_3, sequence number is 13,12 CCE corresponding A CK_1, sequence number is 11,10 CCE corresponding A CK_2, sequence number is 9,8 CCE corresponding A CK_0.

Shown in Fig. 9, the ACK/NACK channel of the PDCCH correspondence of UE_1, UE_2, UE_3, UE_4 is respectively ACK_0, ACK_2, ACK_3, ACK_1.

In this example, for PG ₂, the situation that part is used for the corresponding identical ACK/NACK channel of the different CCE of PDCCH of same format may appear.In Fig. 9, if CCE_15, it is 1 PDCCH that CCE_14 can be used for different forms respectively, and these two PDCCH can corresponding identical ACK/NACK channels.The CCE that distributes corresponding different ACK/NACK channels in the present embodiment to the PDCCH of same format like this, just can avoid corresponding ACK/NACK channel to bump.With reference to figure 9, if UE_3, the PDCCH form of UE_4 is 1, is not UE_3 then, and UE_4 distributes CCE_15, CCE_14 respectively, and distributes CCE_15, CCE_13, and this CCE_15, CCE_13 be corresponding A CK_3, ACK_1 respectively.

Application example five,

This example also is applied to the E-UTRA system, and different with application example three is to suppose S here ₁=S ₂=0, PG ₁, PG ₂All take CCE according to CCE sequence number ascending order.

With reference to Figure 10, according to the rule of correspondence among the above-mentioned S502, for PG ₁In CCE set, above-mentioned specific corresponding relation is: sequence number is 0,2,4,6, the corresponding respectively sequence number of 8,10,12,14 CCE is 0,1,2,3,4,5,6,7 ACK/NACK channel.

For PG ₂In CCE set be contained in PG simultaneously because sequence number is 0,2,4,6 CCE ₁And PG ₂, at PG ₂In can with these several CCE corresponding with its at PG ₁In corresponding identical ACK/NACK channel, promptly be respectively sequence number and be 0,1,2,3 ACK/NACK channel.To other sequence number is 1,3,5,7 CCE, according to the corresponding relation among above-mentioned S502 corresponding A CK/NACK channel successively.Concrete,

For CCE_1:

First priority is that form is that the ACK/NACK channel of 2 PDCCH all can be occupied, thereby seeks second priority;

Second priority can corresponding ACK/NACK channel be ACK_5, ACK_7 (being that form is the ACK/NACK channel that 4 PDCCH can not take), then CCE_1 corresponding A CK_7:

For CCE_3:

Seeking second priority equally can corresponding ACK/NACK channel be ACK_5, then CCE_3 corresponding A CK_5:

For CCE_5:

Seek the 3rd priority and can corresponding ACK/NACK channel be ACK_6 (being that form is the ACK/NACK channel that 8 PDCCH can not take), then CCE_7 corresponding A CK_6:

For CCE_7:

Seek the 3rd priority and can corresponding ACK/NACK channel be ACK_4 (being that form is the ACK/NACK channel that 8 PDCCH can not take), then CCE_7 corresponding A CK_4:

Promptly when CCE_7 distributes to the PDCCH of a CCE, represent current 8 the PDCCH transmission that had, because the number of the PDCCH of transmission can not be greater than the ACK/NACK channel quantity, then can not transmit again and take the PDCCH of CCE8～CCE15, therefore, the ACK/NACK channel that CCE_7 can corresponding CCE_8 correspondence.

Corresponding result as shown in figure 10.

In fact, this example assumes PG ₁And PG ₂All the end from CCE set begins to distribute in the same way CCE, is the CCE that can better support uplink scheduling and the CCE of descending scheduling like this and has situation about overlapping.

Application example six,

This example also is applied to the E-UTRA system, and what this example and application example three were different is that the CCE that distributes to PDCCH is divided into two groups, PG ₁And PG ₂, PG ₁In to comprise form be 2,4,8 PDCCH, the part form is that 1 PDCCH adopts PG ₁Rule shine upon.It is concrete with reference to figure 6,

Individual form is the PDCCH of 1 1CCE, is specially 2 among the figure, is respectively CCE 0 and CCE 8.PG ₂Comprising remaining form and be the PDCCH channel of 1 1CCE, specifically is CCE 10,11 in Figure 20,12,13,14,15.Obviously, use PG ₁The CCE of PDCCH channel occupancy of the 1CCE that determines of rule, can not be again by PG ₂In the PDCCH channel occupancy of 1CCE, i.e. PG ₂In PDCCH takies continuously is the CCE resource of being left.

According to method same in the example 3, can determine PG ₂The ACK/NACK channel label of middle channel correspondence.Among Fig. 6 as can be seen and example 3 relatively, PG ₂In the PDCCH of 1CCE and its corresponding ACK/NACK channel number all identical with example 3.

Embodiment four

This group embodiment and embodiment three basically identicals are for PG ₂, be f with form according to above-mentioned rule _iInitial CCE and ACK/NACK channel corresponding of PDCCH, this correspondence is at N _{CCE_per_PDCCH}=f _iPDCCH.

For N _{CCE_per_PDCCH}＜f _iPDCCH, the corresponding method of grouping in use the foregoing description three of iteration.For N _{CCE_per_PDCCH}=f _I-1PDCCH, need to consider that form be f _i, f _I+1..., the PDCCH channel.For N _{CCE_per_PDCCH}=f _I-2PDCCH, need to consider that form be f _I-1, f _i, f _I+1... the PDCCH channel, or the like.Be specially, with PG ₂Middle form is f _jThe initial CCE of PDCCH, f wherein _j＜f _i, carry out corresponding with following ACK/NACK channel successively: first priority is impossible be formatted as f _J+1The corresponding ACK/NACK channel that uses of PDCCH, second priority is impossible be formatted as f _J+2The corresponding ACK/NACK channel that uses of PDCCH, but do not comprise that the form that takies this CCE is f _J+2The ACK/NACK channel of PDCCH channel correspondence, the 3rd priority is impossible be formatted as f _J+3The ACK/NACK channel that uses of PDCCH, but do not comprise that the form that takies this CCE is f _J+3The ACK/NACK channel of PDCCH channel correspondence, N priority is for can not be formatted as f _J+NThe ACK/NACK channel that uses of PDCCH, wherein N is a positive integer; And, can not corresponding PG ₂In prior to the ACK/NACK channel of the CCE correspondence of its distribution.

As shown in figure 11, the format set of PDCCH be combined into 1,2,4,8}, ACK/NACK channel number N _ACKBe 4, CCE number N _CCE16, at first determine PG ₁For form be 4, the PDCCH channel of 8}, PG ₂For form be 1, the PDCCH channel of 2}, then as Figure 11, the ACK of 4CCE PDCCH CCE0 correspondence is ACK_0, the ACK of CCE4 correspondence is ACK_1, the ACK of CCE8 correspondence is ACK_2, the ACK of CCE12 correspondence is ACK_3; The ACK of 8CCE PDCCH CCE0 correspondence is ACK_0, and the ACK of CCE8 correspondence is ACK_2.PG ₂In the PDCCH of 2CCE adopt rule among the embodiment 3, CCE14 corresponding A CK_3, CCE12 corresponding A CK_1, CCE10 corresponding A CK_2, CCE8 corresponding A CK_0.

PG ₂In the PDCCH channel of 1CCE, the continuous CCE resource that takies, the ack channel of mapping need consider form be 2,4, the ACK of the PDCCH channel correspondence of 8}.Concrete, structure PG ₂ ⁽¹⁾For form be 2,4, the PDCCH channel of 8}, PG ₂ ⁽²⁾For form is { the PDCCH channel of 1}, as Figure 11, then form is that the ack channel of 1 PDCCH channel correspondence is respectively, the ack channel of CCE15 correspondence is that form is the { channel that the PDCCH of 2} can not take, be ACK_3, the ack channel of CCE14 correspondence is that preferentially to select form be the { channel that the PDCCH of 2} can not take, secondly preferentially selecting form is the { channel that the PDCCH of 4} can not take, secondly preferentially selecting form again is { the channel that the PDCCH of 8} can not take, here selecting form is { the channel ACK_1 that the PDCCH of 8} can not take, the rule that CCE13 is same, corresponding A CK_2, CCE14 corresponding A CK_0.

As shown in figure 12, the format set of PDCCH be combined into 1,2,4,8}, ACK/NACK channel number N _ACKBe 6, CCE number N _CCE16, determined PG equally ₁, PG ₂PDCCH and ACK mapping.Structure PG ₂ ⁽²⁾For form is { PDCCH of 1}, PG ₂ ⁽¹⁾For form is that { 2,4, the PDCCH of 8} is to PG ₂ ⁽¹⁾, PG ₂ ⁽²⁾Use above-mentioned similar rule, i.e. PG ₂ ⁽²⁾In the PDCCH channel of 1CCE, preferentially use PG ₂ ⁽¹⁾The middle out of use channel of 2CCE PDCCH, secondly the secondly preferential out of use channel of 4CCE PDCCH that uses preferentially uses the out of use channel of 8CCE PDCCH again, and CCE 15,14,13,12,10 difference corresponding A CK_5, ACK_3, ACK_4, ACK_1, ACK_2, ACK_0.

Embodiment five

In another embodiment, at two kinds of PDCCH (two kinds be meant be respectively applied for the relevant control signaling transmission of uplink and downlink scheduling) may be in a descending sub frame simultaneous situation, on the basis of aforementioned each embodiment, further optimize.In the present embodiment, different with aforementioned each embodiment is to comprise before S7011-S7013:

S7010 is divided into two groups with CCE, first group of PDCCH that is used to transmit the uplink scheduling signaling, second group of PDCCH that is used to transmit the descending scheduling signaling.

S7011-S7013, described two groups of CCE are carried out the step of above-mentioned distribution CCE respectively, with S101 or aforesaid S3011-S3013, perhaps S5011-S5013 is identical, does not give unnecessary details at this.

Accordingly, at receiver side, the step of the described ACK/NACK of obtaining channel comprises: gather the sequence number that obtains descending ACK/NACK channel according to the CCE that is used for the transmission of uplink scheduling signaling, obtain the sequence number of uplink ACK/NACK channel according to the CCE set that is used for the transmission of descending scheduling signaling.

Concrete, two groups of CCE form two CCE set respectively, and so descending ACK/NACK channel is corresponding with the CCE set that is used for the transmission of uplink scheduling signaling, and uplink ACK/NACK channel is corresponding with the CCE set that is used for the transmission of descending scheduling signaling.With reference to Figure 13, do not comprise identical CCE when first group with second group of CCE set, when promptly non-intersect, then the user carries out according to the bright embodiment of aforesaid we respectively when obtaining uplink and downlink ACK/NACK channel.Uplink ACK/NACK channel carries out the recessiveness indication by the CCE set that is used for the transmission of descending scheduling signaling of its correspondence, and the recessiveness indication is carried out in the CCE set that is used for the transmission of uplink scheduling signaling that descending ACK/NACK channel is corresponding with it.

With reference to Figure 14, set contains identical CCE with second group of CCE when first group, promptly exists when overlapping then in the non-overlapping subclass in the CCE set at first according to this method to carry out the corresponding of ACK/NACK channel and CCE.

If the CCE of (Figure 14 bend filling part) still needs to be used for the PDCCH transmission in the overlapping subclass, then in the overlapping subclass, setting is used for the initial CCE of the PDCCH descending and transmission of uplink scheduling signaling, is respectively C ' _S1, C ' _S2, C ' _S1With C ' _S2Can not be identical, at this moment, and setting is used for the uplink ACK/NACK channel start sequence number A ' of the PDCCH correspondence of descending scheduling signaling transmission ₁And be used for the descending ACK/NACK channel start sequence number A ' of the PDCCH correspondence of uplink scheduling signaling transmission ₂, still use rule of the present invention carry out respectively on/correspondence of descending ACK/NACK channel.

Also can adopt method of the present invention in the zone of the channel of being useful on descending scheduling.At this moment, the ACK/NACK channel resource of overlapping region correspondence when distributing to the channel of uplink scheduling in the overlapping region, obviously can discharge.Therefore, the ACK/NACK channel resource of overlapping region correspondence, the logic label of CCE resource that can be by changing the overlapping region makes that corresponding ACK/NACK channel is the bigger ACK/NACK channel resource of label.

Consider in the present embodiment that PDCCH can be used for the situation of the relevant control signaling transmission of up/descending scheduling, CCE is divided into two groups, can make things convenient on the one hand the user to carry out the blind Detecting of CCE simultaneously, on the other hand and the CCE resource that further minimizing system utilizes.

Embodiment six

Embodiments of the invention also provide the transmitting and receiving device of carrying out or use said method.

A kind of PDCCH distributor 10 that the embodiment of the invention provides comprises:

Allocation units 101 are used for available CCE is combined as all candidate PDCCH of various forms, according to the form of PDCCH to be transmitted, select PDCCH to distribute to dispatched users;

Preferable, with reference to Figure 15, described PDCCH distributor 10 is outside allocation units 101, can also comprise: grouped element 102, be used for all candidate PDCCH are divided into two groups, the PDCCH that comprises at least a form among first group of PDCCH, second group of PDCCH do not comprise with this first group of PDCCH in the PDCCH of same format, described form is the quantity that PDCCH comprises CCE; Information after grouped element 102 divides into groups sends to allocation units 101 again and carries out allocation process.

This PDCCH distributor can be chip or or realize the logic module of its function.This PDCCH of being used for distributor is by being divided into PDCCH two groups, begin to distribute the employed CCE of PDCCH of different-format respectively from the certain location of CCE sequence number especially two original positions, make and to take but the actual ack channel that uses can also be used by other user's PDCCH by the PDCCH that comprises a plurality of CCE, like this, under the situation of identical CCE number and ack channel number, can dispatch more user, reduce the waste of CCE and ack channel resource.

Embodiments of the invention also provide a kind of PDCCH receiving system, comprising:

PDCCH detecting unit: the control signal that receives is carried out blind Detecting according to the PDCCH allocation rule, promptly detect the PDCCH that sends, determine the PDCCH that distributes.

Embodiments of the invention also provide a kind of ACK/NACK channels transmit device, as shown in figure 16, comprising:

Corresponding informance provides unit 100, is used to provide the specific corresponding relation of the ACK/NACK interchannel of PDCCH and reservation, can comprise the one or any combination in the following module:

Module one, be used for realizing if ascending order is distributed CCE, ACK_Index=CCE_Index/N _{CCE_per_PDCCH}

Module two, be used for realizing if descending distributes CCE, ACK_Index=(N _CCE-CCE_Index)/N _{CCE_per_PDCCH}

Module three, be used for realizing working as A ₁＜A ₂, and first group of PDCCH sequence number ascending order of pressing CCE is when distributing CCE, and then corresponding relation is ACK_Index=A ₁+ (CCE_Index-S1)/N _{CCE_per_PDCCH}

Module four, be used for realizing working as A ₁＜A ₂, and the sequence number descending that first group of PDCCH presses CCE distributes CCE, and then corresponding relation is ACK_Index=A ₁+ (S1-CCE_Index)/N _{CCE_per_PDCCH}

Module five, be used for realizing working as A ₁＜A ₂, and the sequence number ascending order that second group of PDCCH presses CCE distributes CCE, and then corresponding relation is ACK_Index=A ₂-(CCE_Index-S2)/N _{CCE_per_PDCCH}

Module six, be used for realizing working as A ₁＜A ₂, and the sequence number descending that second group of PDCCH presses CCE distributes CCE, and then corresponding relation is ACK_Index=A ₂-(S2-CCE_Index)/N _{CCE_per_PDCCH}

Module seven, be used for realizing working as A ₁＞A ₂, and the sequence number ascending order that first group of PDCCH presses CCE distributes CCE, and then corresponding relation is ACK_Index=A ₁-(CCE_Index-S1)/N _{CCE_per_PDCCH}

Module eight, be used for realizing working as A ₁＞A ₂, and the sequence number descending that first group of PDCCH presses CCE distributes CCE, and then corresponding relation is ACK_Index=A ₁-(S1-CCE_Index)/N _{CCE_per_PDCCH}

Module nine, be used for realizing working as A ₁＞A ₂, and the sequence number ascending order that second group of PDCCH presses CCE distributes CCE, and then corresponding relation is ACK_Index=A ₂+ (CCE_Index-S2)/N _{CCE_per_PDCCH}

Module ten, be used for realizing working as A ₁＞A ₂, and the sequence number descending that second group of PDCCH presses CCE distributes CCE, and then corresponding relation is ACK_Index=A ₂+ (S2-CCE_Index)/N _{CCE_per_PDCCH}

Module 11, be used for realizing the CCE set for first group of PDCCH, above-mentioned corresponding relation is: sequence number is S ₁, S ₁+ f _I+1, S ₁+ 2f _I+1, S ₁+ 3f _I+1..., S ₁+ (N _ACK-1) f _I+1CCE be A with sequence number successively ₁, A ₁+ 1, A ₁+ 2 ..., A ₁+ N _ACK-1 ACK/NACK channel is corresponding; Be expressed as:

ACK_Index=A ₁+ (CCE_Index-S1)/f _I+1, wherein, CCE_Index represents the sequence number of the CCE corresponding with the ACK/NACK channel; Form among described first group of PDCCH is f _I+1, f _I+2... the ACK/NACK channel of PDCCH correspondence get the ack channel of the CCE correspondence that comprises among the described PDCCH; The ACK/NACK channel of getting label minimum or maximum CCE correspondence when a plurality of is arranged;

Module 12, be used for realizing the CCE set for second group of PDCCH, above-mentioned corresponding relation is: sequence number is S ₂, S ₂-f _i, S ₂-f _i, S ₂-3f _i..., S ₂-(N _ACK-1) f _iThe ACK/NACK channel of CCE below corresponding successively: first priority, can not be by PG ₁Middle N _{CCE_per_PDCCH}=f _I+1The corresponding ACK/NACK channel that uses of PDCCH, second priority, can not be by PG ₁Middle N _{CCE_per_}PDCCH=f _I+2The corresponding ACK/NACK channel that uses of PDCCH, but do not comprise the N that takies this CCE _{CCE_per_PDCCH}=f _I+2The ACK/NACK channel of PDCCH channel correspondence, the 3rd priority, can not be by N _{CCE_per_PDCCH}=f _I+3The ACK/NACK channel that uses of PDCCH, but do not comprise the N that takies this CCE _{CCE_per_PDCCH}=f _I+3The ACK/NACK channel of PDCCH channel correspondence, recursion successively; And, can not corresponding PG ₂In prior to the ACK/NACK channel of the CCE correspondence of its distribution;

Wherein, N _ACKThe ack channel quantity that expression is reserved; ACK_Index represents the ACK/NACK channel designator of user's correspondence, 0≤ACK_Index≤N _ACK-1; N _{CCE_per_PDCCH}The form of representing this PDCCH; CCE_Index represents among this PDCCH the sequence number of the CCE that distributes at first, 0≤CCE_Index≤N _CCE-1; A ₁Represent that first group of PDCCH is PG ₁Corresponding initial ACK/NACK channel designator, 0≤A ₁≤ N _ACK-1; A ₂Represent that second group of PDCCH is PG ₂Corresponding initial ACK/NACK channel designator, 0≤A ₂≤ N _ACK-1, A ₁≠ A ₂S ₁, S ₂Represent the sequence number of dividing the fixing initial CCE of timing with respect to first group of PDCCH, second group of PDCCH in the CCE set respectively, 0≤S ₁≤ N _CCE-1,0≤S ₂≤ N _CCE-1.

The ACK/NACK channel is known unit 110, and the ACK/NACK channel and the PDCCH corresponding relation that provide unit 100 to provide according to corresponding informance is provided, and knows the ACK/NACK channel of distribution by detected PDCCH.

ACK/NACK channels transmit unit 120 is used for the ACK/NACK information mapping is known that in the ACK/NACK channel unit 110 knows the ACK/NACK channel of distribution, launches.

Aforementioned specific corresponding relation can perhaps be stored with corresponding form by equation expression.Described corresponding informance provides the unit specifically to comprise one or more modules, and each module realizes different specific corresponding relations, and is consistent with the description among aforementioned each embodiment, do not give unnecessary details at this.

Embodiments of the invention also provide a kind of ACK/NACK channel receiver, as shown in figure 17: comprise

Corresponding informance provides unit 200, is used to provide the specific corresponding relation of the ACK/NACK interchannel of PDCCH and reservation.This unit provides cellular construction identical with corresponding informance in the ACK/NACK channels transmit device, no longer repeats here.

The ACK/NACK channel is known unit 210: according to ACK/NACK channel and the PDCCH corresponding relation that corresponding informance provides unit 200 to provide, know the ACK/NACK channel of distribution by detected PDCCH.

ACK/NACK channel receiving element 220: know that from the ACK/NACK channel unit 210 knows that the ACK/NACK channel of distribution receives the ACK/NACK information that transmitting terminal sends.

This ACK/NACK channel deriving means can be chip or the logic module that realizes its function.This ACK/NACK channel deriving means, the sequence number of the CCE that distributes at first among the CCE quantity that comprises among the PDCCH according to oneself, this PDCCH, obtain the sequence number of the ACK/NACK channel of this receiver side, do not need the ACK/NACK channel information that shows, implementation is simple, thereby reduces the communication resource waste of system.

Embodiments of the invention also provide a kind of base station, comprise PDCCH distributor 10, dispatching device 20, mapping device 30, ACK/NACK channels transmit device 40, and ACK/NACK channel receiver 50.

Wherein, PDCCH distributor 10 links to each other with dispatching device 20, mapping device 30 respectively, and dispatching device 20 is used for determining which user of scheduling and PDCCH thereof, sends to PDCCH distributor 10; The CCE that PDCCH distributor 10 is used for distributing sends to mapping device 30 and is mapped to and is launched by antenna after the Physical Resource Block.

PDCCH distributor 10 further comprises allocation units and grouped element; The PDCCH grouping information that allocation units provide according to grouped element, distribute CCE to give the physical downlink control channel PDCCH of dispatched users waiting for transmission, form order from big to small according to each PDCCH is distributed assignable CCE successively, maybe all assignable CCE are combined into all candidate PDCCH of different-format according to ad hoc rules, the reallocation candidate PDCCH give dispatched users, and described form refers to that this PDCCH comprises the quantity of CCE.

ACK/NACK channels transmit device 40, be used for specific corresponding relation according to ACK/NACK channel and PDCCH, know the corresponding ACK/NACK channel that distributes by the PDCCH assignment information, the ACK/NACK channel Mapping is transmitted to terminal on the ACK/NACK channel that distributes.

Described ACK/NACK channel receiver 50, be used for specific corresponding relation according to ACK/NACK channel and PDCCH, know the corresponding ACK/NACK channel that distributes by the PDCCH assignment information, the ACK/NACK information that receiving terminal sends from the ACK/NACK channel that distributes.

The embodiment of the invention also provides a kind of terminal, comprises separating mapping device 60, blind Detecting device 70, ACK/NACK channels transmit device 80, and ACK/NACK channel receiver 90;

Wherein, separating mapping device 60 links to each other with blind Detecting device 70, being used for that terminal is received physical signalling separates mapping and obtains signal on each CCE, and the signal on each CCE sent to blind Detecting device 70, blind Detecting device 70 also links to each other with ACK/NACK channels transmit device 80 with ACK/NACK channel receiver 90 respectively, be used for that the signal on each CCE that obtains is carried out blind Detecting and obtain base station assigns and give own PDCCH, and the serial number information of the CCE that the PDCCH of distribution is comprised sends to ACK/NACK channel receiver 90 and ACK/NACK channels transmit device 80; The sequence number of the CCE that the PDCCH of the distribution that provides according to the blind Detecting device comprises is provided ACK/NACK channel receiver 90, the corresponding relation that reaches the ACK/NACK interchannel of PDCCH and reservation is known the ACK/NACK channel of distribution, and the ACK/NACK information mapping is transmitted to the base station on the ACK/NACK channel that distributes; The sequence number of the CCE that the PDCCH of the distribution that provides according to the blind Detecting device comprises is provided ACK/NACK channels transmit device 80, and the corresponding relation of the ACK/NACK interchannel of PDCCH and reservation is known the ACK/NACK channel of distribution, the ACK/NACK information that sends from the ACK/NACK channel reception base station of distributing.

In the various embodiments of the present invention, the sequence number of CCE is a kind of logic sequence number, can change the order of sequence number, obtains feasible scheme in addition.For example, the CCE sequence number can be from 0,1, and 2,3,4,5,6,7,8,9,10,11,12,13,14,15, change to 0,1,2,3,4,5,6,7,12,13,14,15,8,9,10,11, the ACK/NACK channel number of CCE sequence number correspondence does not change, and then obtains other feasible scheme.

In the various embodiments of the present invention, divide timing carrying out CCE, system can be combined into CCE all candidate PDCCH of various forms in advance, for example, for 16 CCE, can be combined into the PDCCH of 28 CCE, combine by CCE_0～CCE_7 and CCE_8～CCE_15 respectively, can also be combined into the PDCCH of 44 CCE, combine by CCE_0～CCE_3, CCE_4～CCE_7, CCE_8～CCE_11, CCE_12～CCE_15 respectively.Then PDCCH waiting for transmission is distributed CCE, be equal to from the candidate PDCCH of the various forms that made up in advance by CCE and select corresponding candidate PDCCH as PDCCH waiting for transmission, the CCE that the candidate PDCCH that selects comprises is the CCE that distributes to PDCCH waiting for transmission.For example, current have two PDCCH waiting for transmission, and form is divided into 8 CCE and 4 CCE, then select by CCE_0～CCE_7 and by the candidate PDCCH of CCE_8～CCE_11 combination as PDCCH waiting for transmission.When carrying out the CCE combination, also candidate PDCCH can be divided into two groups by form,, make up the candidate PDCCH of various forms successively according to particular order respectively from the fixing initial CCE of setting.

In the technical scheme that the embodiment of the invention provides, the physical channel that can also be used for other type (it is believed that in full, power control channel, pilot channel etc.) distribution indication, promptly pass through the distribution of physical channel A, and the corresponding relation of physical channel A and physical channel B, the distribution of recessive indication physical channel B.

The PDCCH distribution method that the embodiment of the invention provides distributes indication with the waste of minimizing ACK/NACK channel resource except being used for ack channel, use this PDCCH distribution method can also reduce PDCCH blind Detecting number of times effectively separately, because, PDCCH is by format packets and begin to carry out the CCE distribution of PDCCH from fixing initial CCE, when terminal preferentially detects the PDCCH of certain form, can begin from the fixing initial CCE of the PDCCH of this form to detect.

The embodiment of the invention also provides a kind of readable computer media, for example CD, floppy disk, disk etc., and this computer media is carried out the method among aforementioned each embodiment when operation.

Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims (13)

1. the indicating means of an ACK/NACK channel allocation, according to the corresponding relation of the PDCCH that sets with the ACK/NACK channel of reservation, the ACK/NACK channel of dispatched users is distributed in indication, it is characterized in that, and described corresponding relation is satisfied:

PDCCH is divided into first group and second group according to predetermined PDCCH form;

Set respectively first group with second group of ACK/NACK channel that PDCCH is corresponding, second group n PDCCH can not be by the ACK/NACK channel of the PDCCH correspondence of the specific format among first group of PDCCH according to the preferential correspondence of predefined PDCCH order at least, and n is a positive integer.

2. the indicating means of ACK/NACK channel allocation according to claim 1 is characterized in that,

Described first group with second group of PDCCH in each self-contained PDCCH form preestablish by system; Or

ACK/NACK channel quantity according to assignable CCE quantity, reservation is adjusted.

3. the indicating means of ACK/NACK channel allocation according to claim 1 is characterized in that, described PDCCH is for being combined into all assignable CCE all candidate PDCCH of different-format according to ad hoc rules.

4. ACK/NACK channel allocation indicating means according to claim 1 is characterized in that, describedly PDCCH is divided into first group of step with second group comprises:

In the PDCCH form, select specific form f _i, f _I+1, wherein, with set { f ₁, f ₂, f ₃... } and the form of expression PDCCH, and f ₁＜f ₂＜f ₃＜...;

With N _{CCE_per_PDCCH}〉=f _I+1PDCCH be grouped into first group of PDCCH;

With N _{CCE_per_PDCCH}≤ f _iPDCCH be grouped into second group of PDCCH;

Wherein, N _ACKThe ack channel quantity that expression is reserved; N _CCEBe the CCE quantity of distributing, N _{CCE_per_PDCCH}The form of expression PDCCH.

5. the indicating means of ACK/NACK channel allocation according to claim 4 is characterized in that, described specific form f _i, f _I+1Satisfy

Perhaps described specific form f _i, f _I+1Preestablish aforementioned mathematic sign by system

Expression is less than or equal to the maximum integer of a.

6. the indicating means of ACK/NACK channel allocation according to claim 5 is characterized in that,

The corresponding relation of distributing to first group of PDCCH and ACK/NACK channel is:

ACK_Index=A ₁+ (CCE_Index-S ₁)/f _I+1, wherein, CCE_Index represents the sequence number of the initial CCE of the PDCCH corresponding with the ACK/NACK channel, ACK_Index represents the ACK/NACK channel designator of PDCCH correspondence, 0≤ACK_Index≤N _ACK-1; A1 represents the initial ACK/NACK channel designator of first group of PDCCH correspondence, 0≤A ₁≤ N _ACK-1; S ₁The fixing initial CCE sequence number of representing first group of PDCCH.

7. the indicating means of ACK/NACK channel allocation according to claim 5 is characterized in that,

Second group at least the corresponding relation of n PDCCH and ACK/NACK channel be: with form in second group is f _iPDCCH carry out corresponding with following ACK/NACK channel successively: first priority is to be f by form among first group of PDCCH _I+1The corresponding ACK/NACK channel that uses of PDCCH; N priority is to be formatted as f _I+NThe ACK/NACK channel that uses of PDCCH, but do not comprise that taking this form is f _iThe form of CCE of PDCCH be f _I+MThe ACK/NACK channel of PDCCH correspondence, wherein M is the positive integer greater than 1, can not corresponding second group in prior to the ACK/NACK channel of the PDCCH correspondence of its corresponding A CK/NACK channel, wherein n is a positive integer.

8. the indicating means of ACK/NACK channel allocation according to claim 1 is characterized in that, described predefined PDCCH is sequence number ascending order or the descending according to the CCE of combination PDCCH in proper order.

9. the indicating means of ACK/NACK channel allocation according to claim 7 is characterized in that,

With in second group at least n form be f _j(f _j＜f _i) PDCCH, carry out corresponding with following ACK/NACK channel successively: first priority is to be formatted as f _J+1The corresponding ACK/NACK channel that uses of PDCCH, N priority is for can not be formatted as f _J+NThe ACK/NACK channel that uses of PDCCH, wherein N is a positive integer, n is a positive integer.

10. according to the indicating means of claim 7 or 9 described ACK/NACK channel allocation, it is characterized in that,

For the CCE that is contained in second group of PDCCH, if it also is contained in first group PDCCH simultaneously, and this CCE corresponding with the PDCCH that comprises this CCE ACK/NACK channel in first group carries out corresponding, then in second group, ACK/NACK channel and this CCE of PDCCH correspondence that comprises this CCE corresponding ACK/NACK channel in first group is identical, adopts second group of described corresponding relation to carry out corresponding with the ACK/NACK channel to the PDCCH that comprises other CCE in second group.

11. the indicating means according to the described ACK/NACK channel allocation of arbitrary claim among the claim 1-10 is characterized in that,

The CCE that distributes is divided into first group and second group, and first group of CCE is used to transmit the PDCCH of uplink scheduling signaling, and second group of CCE is used to transmit the PDCCH of descending scheduling signaling;

Described first group is distributed with second group of CCE, and described first group of CCE satisfies aforementioned corresponding relation with the descending ACK/NACK channel that system reserves, and the uplink ACK/NACK channel of described second group of CCE and system's reservation satisfies aforementioned corresponding relation.

12. an ACK/NACK channels transmit device is characterised in that, comprising:

Corresponding informance provides the unit, and the corresponding relation of the ACK/NACK interchannel of PDCCH and reservation is provided, and described corresponding relation satisfies:

PDCCH is divided into first group and second group according to predetermined PDCCH form;

Set respectively first group with second group of ACK/NACK channel that PDCCH is corresponding, and second group n the preferential correspondence of PDCCH can not be by the ACK/NACK channel of the PDCCH correspondence of the specific format among first group of PDCCH at least, wherein n is a positive integer;

The ACK/NACK channel is known the unit, is used for providing according to described corresponding informance the corresponding relation of the ACK/NACK interchannel of PDCCH that the unit provides and reservation, knows the corresponding ACK/NACK channel that distributes by the PDCCH that distributes;

ACK/NACK channels transmit unit is used for that the ACK/NACK information mapping is known in described ACK/NACK channel that the unit is known on the ACK/NACK channel of distribution and launches.

13. an ACK/NACK channel receiver is characterized in that, comprising:

Corresponding informance provides the unit, and the specific corresponding relation of the ACK/NACK interchannel of PDCCH and reservation is provided, and described corresponding relation satisfies:

PDCCH is divided into first group and second group according to predetermined PDCCH form;

Set respectively first group with second group of ACK/NACK channel that PDCCH is corresponding, second group n the preferential correspondence of PDCCH can not be by the ACK/NACK channel of the PDCCH correspondence of the specific format among first group of PDCCH at least, wherein n is a positive integer;

The ACK/NACK channel is known the unit, and the ACK/NACK channel and the PDCCH corresponding relation that provide the unit to provide according to described corresponding informance is provided, and knows the ACK/NACK channel of distribution by the PDCCH that distributes;

ACK/NACK channel receiving element is used for knowing that from described ACK/NACK channel the unit knows that the ACK/NACK channel of distribution receives the ACK/NACK information that transmitting terminal sends.

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