CN101730139B - Descending control channel assignment and blind test method - Google Patents

Descending control channel assignment and blind test method Download PDF

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Publication number
CN101730139B
CN101730139B CN2008101727037A CN200810172703A CN101730139B CN 101730139 B CN101730139 B CN 101730139B CN 2008101727037 A CN2008101727037 A CN 2008101727037A CN 200810172703 A CN200810172703 A CN 200810172703A CN 101730139 B CN101730139 B CN 101730139B
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carrier frequency
control information
information
subscriber equipment
descending control
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CN101730139A (en
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黄磊
刘仁茂
丁铭
陈晨
孙国林
张应余
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Sharp Corp
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Sharp Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention provides a design and a test method for a descending control channel in an LTE-Advanced system, particularly a descending control channel assignment method for a base station and a descending control channel blind test method for user equipment. PDCCH index information is introduced to a general DCI format according to the invention, which is used for the blind test on basal carrierfrequency, the user equipment realizes the rapid effective blind test course through the PDCCH index information, and the frequency of the blind test and the required power consumption are effectively reduced.

Description

Down control channel distributes and blind checking method
Technical field
The present invention relates to the mobile communication technology field, particularly relate to the design of LTE-Advanced system descending control channel, the design of descending control information format, and subscriber equipment carries out the method for blind Detecting to down control channel.According to the present invention, a kind of down control channel for base station (eNB) (PDDCH) distribution method and a kind of down control channel for subscriber equipment (UE) (PDDCH) blind checking method have been proposed.
Background technology
Design (the R1-082468 of four kinds of possible in the LTE-Advanced system different down control channels has discussed in 3GPP TSG RAN WG153bis meeting in Ericsson, Carrier aggregation in LTE-Advanced, 3GPP TSG RANWG153bis, Warsaw, Poland, June30-July4,2008).The first scheme is, distributes independently PDCCH on each component carrier frequency (component carrier), is used to indicate the assignment information of the PDSCH on this carrier frequency.This scheme can be reused Downlink Control Information (DCI) form that defines among the LTE Rel-8, but the expense of this signaling can increase to the increase of the bandwidth of operation of subscriber equipment along with scheduling.First scheme is to indicate respectively a plurality of PDCCH of the assignment information of PDSCH on the component carrier frequency to be positioned on one of them component carrier frequency.This scheme need to be introduced new DCI form, wherein needs to comprise component carrier frequency number such field, to distinguish this PDCCH for which section component carrier frequency.The third scheme is that the assignment information of the PDSCH on the component carrier frequency of all scheduling is indicated by a PDCCH who is positioned on certain component carrier frequency.This scheme need to be introduced a kind of new DCI form equally, and unification is carried out Unified number to the corresponding Resource Block of the PDSCH on a plurality of component carrier frequency (RB).The 4th kind of scheme is that the PDCCH distribution mechanism of LTE is extended on the whole system bandwidth.
Further instruction (R1-083730 has been to above-mentioned relevant scheme in Nokia in 3GPP TSG RAN WG154bis meeting, L1control signaling with carrieraggregat ion in LTE-Advanced, 3GPPTSG RAN1 WG1 54bis, Prague, Czech Rep., Sep29-Oct3,2008).The document is divided into two large classes to the PDCCH design in the LTE-Advanced system.One class is the corresponding PDCCH independently of the component carrier frequency of each distribution, another kind ofly forms an independent PDCCH for the component carrier frequency of all distribution being carried out combined coding.Especially, also point out in the document can carry out combined coding based on a CRC when adopting a PDCCH to indicate the resource on the whole bandwidth of operation to divide timing, thereby reduce expense.Consider that simultaneously payload is larger, the maximum PDCCH size that defines among the LTE Rel-8 is 8 control channel unit CCE (Control Channel Element), this restriction may can't be satisfied the LTE-Advanced system, therefore need to redefine new structure.In emerging company a kind of control channel structure (R1-083609, General control channel design for LTE-A, 3GPP TSG RAN WG1 54bis of layering have been proposed in same meeting, Prague, Czech Rep., Sep29-Oct3,2008).This organization definition a kind of new DCI form be used to indicate the carrier frequency at PDCCH place.Define a basic carrier frequency, LTE-Advanced user always monitors this basis carrier frequency with described new DCI form, and according to the DCI information that monitors, finds the carrier frequency at PDCCH place, reads the control information on corresponding each carrier frequency.This scheme can reduce LTE-Advanced user's blind Detecting number of times effectively by the structure of layering, thereby reaches the effect that reduces user emission power.Yet, according to the description in its motion, exist certain problem in specific implementation.According to associated description (the 3GPP TS36.213v8.4.0 of present 3GPP to PDCCH assigning process among the LTE, 3GPP TSG RANE-UTRA Physical layer procedures (Release8), 2008-09), PDCCH for the specific user, according to its user RNTI, have 16 candidate CCE set for its dispatching distribution.In the dispatching cycle, can only distribute a candidate CCE set to be used for certain specific user's of transmission PDCCH information.The scheme that emerging company proposes in considering, when the respective resources of having given certain LTE-Advanced user assignment at above-mentioned basic carrier frequency, this user need to go out corresponding PDCCH index information with the new DCI format detection that defines at this basis carrier frequency, then know at basic carrier frequency that according to this index information PDCCH is arranged, use again the corresponding resource allocation information of corresponding DCI format detection.As realizing said process, must satisfy one of following two assumed conditions: needs are two RNTI of each LTE-Advanced user equipment allocation, one is used for this subscriber equipment at the above-mentioned index information of basic carrier frequency detection, and another is for detection of the PDCCH on this basis carrier frequency; Need to be two candidate CCE set of a LTE-Advanced user equipment allocation at basic carrier frequency perhaps.Previous hypothesis is distributed to LTE-Advanced user with what limited RNTI was divided into two, is the lower distribution method of a kind of efficient, has reduced the number of users of effective access.Rear a kind of hypothesis is divided into two the PDCCH resource on the basic carrier frequency, and this will reduce schedulable number of users in each dispatching cycle.In sum, there is larger problem in the layering PDCCH scheme that emerging company proposes in system's practical application.Therefore be necessary it is further improved, propose on this basis practicable solution.
Summary of the invention
Technical problem to be solved by this invention is how to realize distribution and the testing process of PDCCH in the LTE-Advanced system.The object of the invention is to effectively solve because the LTE-Advanced system bandwidth is made of the wasting of resources problem that multistage PDCCH distributes and multistage PDCCH blind Detecting may cause that causes a plurality of carrier frequency.
The means that solve the problems of the technologies described above
In order to realize these and/or other advantage, and according to purpose of the present invention, as concrete and extensively describe ground herein, the present invention is embodied in a kind of design and test method of LTE-Advanced system descending control channel.
According to the present invention, a kind of down control channel distribution method for the base station has been proposed, comprising: by broadcast channel to subscriber equipment transmitting system carrier frequency information; Send working carrier frequency information and basic carrier frequency indication information by high-level signaling to subscriber equipment; Be current scheduling user devices allocation resource; Adopt improved descending control information format to encapsulate control information on the basic carrier frequency; Adopt general descending control information format to encapsulate control information on other non-basic carrier frequency.
Preferably, on basic carrier frequency, adopt the ascending resource assignment information of improved descending control information format encapsulation subscriber equipment, and on the working carrier frequency of described other non-basic carrier frequency of subscriber equipment, adopt general descending control information format to encapsulate the downlink resource assignment information of described subscriber equipment.
Preferably, described general descending control information format is the new descending control information format that is used for encapsulating the control information on the non-basic carrier frequency of introducing of descending control information format and/or LTE-Advanced system that defines in the LTE system.
Preferably, described down control channel distribution method for the base station also comprises: according to the schedule information whether the up-downgoing shared channel of current scheduling user equipment is arranged on the scheduling result judgement basis carrier frequency.
Preferably, described down control channel distribution method for the base station also comprises: if the schedule information of the up-downgoing shared channel of current scheduling user equipment is arranged on the basic carrier frequency, adopt improved descending control information format to encapsulate control information on the basic carrier frequency; If there is not the schedule information of the up-downgoing shared channel of current scheduling user equipment on the basic carrier frequency, the descending control information format that employing is introduced encapsulates the control information on the basic carrier frequency.
Preferably, described improved descending control information format comprises whole fields and the down control channel index information bit of general descending control information format,
If the schedule information of the up-downgoing shared channel of current scheduling user equipment is arranged on the basic carrier frequency, encapsulate whole fields of the general descending control information format in the described improved descending control information format according to general descending control information format, if there is not the schedule information of the up-downgoing shared channel of current scheduling user equipment on the basic carrier frequency, adopt under the current scheduling user equipment mode of operation the minimum descending control information format of bit number in the improved descending control information format to encapsulate control information on the basic carrier frequency, and whole fields of the general descending control information format in the described improved descending control information format are set arbitrarily, which carrier frequency is down control channel (PDCCH) information that described down control channel index information bit is used to indicate current scheduling user equipment be positioned on.
Preferably, described improved descending control information format comprises whole fields and the down control channel index information bit of general descending control information format, if the schedule information of the up-downgoing shared channel of current scheduling user equipment is arranged on the basic carrier frequency, encapsulate whole fields of the general descending control information format in the described improved descending control information format according to general descending control information format, if there is not the schedule information of the up-downgoing shared channel of current scheduling user equipment on the basic carrier frequency, adopt under the current scheduling user equipment mode of operation the minimum descending control information format of bit number in the improved descending control information format to encapsulate control information on the basic carrier frequency, and the resource allocation information field of the general descending control information format to the described improved descending control information format of major general sets to 0, and which carrier frequency is the PDCCH information that described down control channel index information bit is used to indicate current scheduling user equipment be positioned on.
Preferably, described improved descending control information format comprises whole fields and the down control channel index information bit of general descending control information format, if the schedule information of the up-downgoing shared channel of current scheduling user equipment is arranged on the basic carrier frequency, encapsulate whole fields of the general descending control information format in the described improved descending control information format according to general descending control information format, which carrier frequency is the PDCCH information that described down control channel index information bit is used to indicate current scheduling user equipment be positioned on, and the descending control information format of described introducing only comprises described down control channel index information bit.
Preferably, described down control channel distribution method for the base station also comprises: the assigning process according to the LTE definition is mapped to the control information on each carrier frequency on the corresponding control channel of each carrier frequency unit CCE.
Preferably, described down control channel distribution method for the base station also comprises: send Downlink Control Information on each carrier frequency to subscriber equipment.
Preferably, described down control channel distribution method for the base station is applicable to the LTE-Advanced system.
According to the present invention, a kind of down control channel blind checking method for subscriber equipment has also been proposed, comprising: by broadcast channel, obtain system's carrier frequency information; By high-level signaling, obtain working carrier frequency information and basic carrier frequency indication information; Adopt the descending control information format of improved descending control information format and introducing that the control channel on the basic carrier frequency is carried out blind Detecting; Judge whether to detect control information; If detect the control information for this subscriber equipment, read the down control channel index information bit that comprises in the descending control information format of improved descending control information format or introducing; According to down control channel index information bit, whether the schedule information of the up-downgoing shared channel of this subscriber equipment is arranged on the judgement basis carrier frequency; If the schedule information of the up-downgoing shared channel of this subscriber equipment is arranged on the basic carrier frequency, then the Gains resources assignment information reads the data message on the basic carrier frequency.
Preferably, described down control channel blind checking method for subscriber equipment also comprises: if the schedule information of the up-downgoing shared channel of this subscriber equipment not on the basic carrier frequency, then adopt general descending control information format to carry out blind Detecting at other indicated non-basic carrier frequency of down control channel index information bit, the Gains resources assignment information reads the data message on the corresponding carrier frequency.
Preferably, described down control channel blind checking method for subscriber equipment also comprises: if do not detect control information for this subscriber equipment, then this customer equipment data not in this dispatching cycle finishes to work as pre-treatment, waits for next dispatching cycle.
Preferably, described improved descending control information format comprises whole fields and the down control channel index information bit of general descending control information format, if the schedule information of the up-downgoing shared channel of this subscriber equipment is arranged on the basic carrier frequency, then whole fields of the general descending control information format in the described improved descending control information format encapsulate according to general descending control information format, if the schedule information of the up-downgoing shared channel of this subscriber equipment not on the basic carrier frequency, the descending control information format that then adopts is the descending control information format under minimum improved this subscriber equipment mode of operation of bit number, whole fields of the general descending control information format in the described improved descending control information format are to arrange arbitrarily, which carrier frequency is the PDCCH information that described down control channel index information bit is used to indicate this subscriber equipment be positioned on, and the descending control information format of described introducing only comprises described down control channel index information bit.
Preferably, described improved descending control information format comprises whole fields and the down control channel index information bit of general descending control information format, if the schedule information of the up-downgoing shared channel of this subscriber equipment is arranged on the basic carrier frequency, then whole fields of the general descending control information format in the described improved descending control information format encapsulate according to general descending control information format, if the schedule information of the up-downgoing shared channel of this subscriber equipment not on the basic carrier frequency, then the control information on the basic carrier frequency is to adopt under this subscriber equipment mode of operation that the minimum descending control information format of bit number encapsulates in the improved descending control information format, and the resource allocation information field of the general descending control information format in the described at least improved descending control information format is set to 0, which carrier frequency is the PDCCH information that described down control channel index information bit is used to indicate this subscriber equipment be positioned on, and the descending control information format of described introducing only comprises described down control channel index information bit.
Preferably, described general descending control information format is the new descending control information format that is used for encapsulating corresponding control information of introducing of descending control information format and/or LTE-Advanced system that defines in the LTE system.
Preferably, described down control channel blind checking method for subscriber equipment is applicable to the LTE-Advanced system.
According to the first specific embodiments of the present invention, a kind of PDCCH distribution method for the base station has been proposed, comprising:
ENB by broadcast channel to LTE-Advanced subscriber equipment transmitting system carrier frequency information;
ENB sends working carrier frequency information and basic carrier frequency indication information by high-level signaling to the LTE-Advanced subscriber equipment;
ENB is current scheduling user devices allocation resource;
ENB is according to the schedule information whether this user's up-downgoing shared channel is arranged on the scheduling result judgement basis carrier frequency;
If the schedule information of this user's up-downgoing shared channel is arranged on the basic carrier frequency, adopt improved DCI form to encapsulate control information on the basic carrier frequency;
If the schedule information of this user's up-downgoing shared channel not on the basic carrier frequency adopts improved DCI form under the minimum current scheduling user equipment mode of operation of bit number to encapsulate control information on the basic carrier frequency, resource allocation bit is wherein put full 0;
Adopt general DCI form to encapsulate control information on other non-basic carrier frequency.
According to the second specific embodiments of the present invention, a kind of PDCCH blind checking method for subscriber equipment has been proposed, comprising:
Subscriber equipment obtains system's carrier frequency information by broadcast channel;
Subscriber equipment obtains working carrier frequency information and basic carrier frequency indication information by high-level signaling;
Subscriber equipment adopts improved DCI form that the control channel on the basic carrier frequency is carried out blind Detecting;
Subscriber equipment judges whether to detect control information;
If subscriber equipment does not detect control information, then this customer equipment data not in this dispatching cycle is not done other processing;
If detect the control information for this subscriber equipment, read the PDCCH index information;
According to the PDCCH index information, whether the schedule information of this user's up-downgoing shared channel is arranged on the judgement basis carrier frequency;
If the schedule information of this user's up-downgoing shared channel is arranged on the basic carrier frequency, then the Gains resources assignment information reads the data message on the basic carrier frequency;
If the schedule information of this user's up-downgoing shared channel not on the basic carrier frequency then adopts general DCI form to carry out blind Detecting at other non-basic carrier frequency of PDCCH index information indication, the Gains resources assignment information reads the data message on the corresponding carrier frequency.
According to the 3rd specific embodiments of the present invention, the another kind of PDCCH distribution method that is used for the base station has been proposed, comprising:
ENB by broadcast channel to LTE-Advanced subscriber equipment transmitting system carrier frequency information;
ENB sends working carrier frequency information and basic carrier frequency indication information by high-level signaling to the LTE-Advanced subscriber equipment;
ENB is current scheduling user devices allocation resource;
ENB is according to the schedule information whether this user's up-downgoing shared channel is arranged on the scheduling result judgement basis carrier frequency;
If the schedule information of this user's up-downgoing shared channel is arranged on the basic carrier frequency, adopt improved DCI form to encapsulate control information on the basic carrier frequency;
If the schedule information of this user's up-downgoing shared channel not on the basic carrier frequency adopts the DCI form X that introduces to encapsulate control information on the basic carrier frequency;
Adopt general DCI form to encapsulate control information on other non-basic carrier frequency.
According to the 4th specific embodiments of the present invention, the another kind of PDCCH blind checking method that is used for subscriber equipment has been proposed, comprising:
Subscriber equipment obtains system's carrier frequency information by broadcast channel;
Subscriber equipment obtains working carrier frequency information and basic carrier frequency indication information by high-level signaling;
Subscriber equipment adopts the DCI form X of improved DCI form and introducing that the control channel on the basic carrier frequency is carried out blind Detecting;
Subscriber equipment judges whether to detect control information;
If subscriber equipment does not detect control information, then this customer equipment data not in this dispatching cycle is not done other processing;
If detect the control information for this subscriber equipment, the control information on the basic carrier frequency of the DCI form X encapsulation that determines whether to introduce;
Control information on the basic carrier frequency of the DCI form X encapsulation of introducing then illustrates the schedule information that this user's up-downgoing shared channel is arranged on the basic carrier frequency, and the Gains resources assignment information reads the data message on the basic carrier frequency;
Read the PDCCH index information in the control information that blind check measures;
Adopt general DCI form to carry out blind Detecting at other non-basic carrier frequency of PDCCH index information indication, the Gains resources assignment information reads the data message on the corresponding carrier frequency.
Can be found out by the scheme that foregoing invention provides, the PDCCH index is incorporated in the general DCI form, to be used for the blind Detecting on the basic carrier frequency, by this PDCCH index, subscriber equipment has been realized fast and effectively blind detection process, has effectively reduced the number of times of blind Detecting and required power consumption.
Description of drawings
By below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:
Fig. 1 is that LTE-Advanced system bandwidth multi-carrier frequency is assembled schematic diagram;
Fig. 2 is the only schematic diagram of carrier frequency transmission system synchronizing channel and broadcast channel of LTE-Advanced system;
Fig. 3 is the schematic diagram of all carrier frequency transmission system synchronizing channels of LTE-Advanced system and broadcast channel;
Fig. 4 is the signaling process figure of the corresponding carrier frequency information of LTE-Advanced system transmissions;
Fig. 5 has the RB resource to divide timing subscriber equipment control channel structural representation on the basic carrier frequency;
Fig. 6 does not have the RB resource to divide timing subscriber equipment control channel structural representation on the basic carrier frequency;
Fig. 7 does not have the RB resource to divide timing subscriber equipment control channel structural representation on the another kind of basic carrier frequency;
Fig. 8 is that a kind of base station equipment is distributed the PDCCH flow chart;
Fig. 9 is a kind of subscriber equipment blind Detecting PDCCH flow chart;
Figure 10 is that a kind of base station equipment is distributed the PDCCH flow chart;
Figure 11 is a kind of subscriber equipment blind Detecting PDCCH flow chart;
Figure 12 has the RB resource to divide timing subscriber equipment control channel structural representation on a kind of basic carrier frequency;
Figure 13 does not have the RB resource to divide timing subscriber equipment control channel structural representation on the another kind of basic carrier frequency;
Figure 14 is that a kind of base station equipment is distributed the PDCCH flow chart;
Figure 15 is a kind of subscriber equipment blind Detecting PDCCH flow chart; And
Figure 16 is subscriber equipment control channel structural representation in the LTE-Advanced system, when being mapped with ascending resource distribution (UL grant) on the basic carrier frequency.
Embodiment
The embodiment of first-selection of the present invention will be described below by reference to the accompanying drawings.In the description process below, having omitted is unnecessary details and function for the present invention, obscures to prevent that the understanding of the present invention from causing.
At length set forth performing step of the present invention for clear, the below has provided specific embodiments of the invention, is applicable to the LTE-Advanced cell mobile communication systems.Need to prove that the present invention is not limited to this application, but applicable to other related mobile communication system.
Defined the schedule information that 7 kinds of DCI forms are used for transmission user up-downgoing shared channel in the LTE system, they are respectively Format0, Format1, Format1A, Format1B, Format1D, Format2 and Format2A.
In order to describe better the present invention, the below does concise and to the point description to the format content of Format0 and Format1A first, and the detailed content of other formal definition can be referring to LTE standardization document 3GPP TS36.212v8.4.0.
The supposing the system upstream and downstream bandwidth is 20MHz, and namely system bandwidth takies 110 RB.
###
DCI form 0 (Format0) amounts to 28 bits, is used for encapsulating the schedule information of Uplink Shared Channel PUSCH, comprises following field:
Format information: 1 bit is used for distinguishing form 0 and form 1A, bit value 0 presentation format 0, bit value 1 presentation format 1A;
Frequency hopping indication information: 1 bit;
Resource allocation information: 13 bits;
Modulation coding mode: 5 bits;
New data indication information: 1 bit;
Uplink power control information: 2 bits;
Demodulation reference signaling (DM RS) circular shift information: 3 bits;
CQI solicited message: 1 bit;
Replenish bit: 2 bits, if the information bit of form 0 less than the information bit of form 1A, then in the back zero padding to consistent with the information bit of form 1A.
***
###
DCI form 1A (Format1A) amounts to 28 bits, is used for encapsulating the schedule information of single codeword DSCH Downlink Shared Channel PDSCH, comprises following field:
Format information: 1 bit is used for distinguishing form 0 and form 1A, bit value 0 presentation format 0, bit value 1 presentation format 1A;
Virtual RB (VRB) type information: 1 bit;
Resource allocation information: 13 bits;
Modulation coding mode: 5 bits;
HARQ process information: 3 bits;
New data indication information: 1 bit;
Redundancy version information: 2 bits;
Uplink power control indication information: 2 bits.
***
Defined following 7 kinds of transmission modes in the LTE system:
1. single antenna transmissions, port0
2. transmission diversity
3. open loop space division multiplexing
4. closed loop space division multiplexing
5. multiuser MIMO
6. the closed loop order is 1 precoding
7. single antenna transmissions, port5
The LTE subscriber equipment carries out the PDCCH blind Detecting according to its transmission mode, and the corresponding relation between transmission mode and the DCI form is as shown in table 1 below.
Table 1
Transmission mode With reference to the DCI form
1 1，1A
2 1，1A
3 2A
4 2
5 1D
6 1B
7 1，1A
The LTE-Advanced system bandwidth is comprised of the sub-band of 5 20MHz, and these sub-bands lay respectively on the carrier frequency 1～5, and the center frequency point of each carrier frequency is respectively f1～f5, as shown in Figure 1.
Base station eNB forms the center frequency point information of each carrier frequency of system bandwidth by broadcast channel broadcasts.Concrete implementation can be decided according to the configuration of system synchronization channel SCH and BCCH channel of broadcast control.
As shown in Figure 2, when SCH and BCCH are arranged on only having carrier frequency 3 in the system, can be by this BCCH transmission carrier frequency information, for example (f 1, f 2, f 4, f 5).The LTE-Advanced subscriber equipment is when synchronous, and the center frequency point that can know the carrier frequency at SCH place is f 3, by obtaining BCCH information, just can directly obtain the center frequency point information f of all carrier frequency 1～f 5Can also be by the center frequency point difference information of this BCCH transmission carrier frequency, for example (Δ f 1, Δ f 2, Δ f 4, Δ f 5), Δ f wherein 1=f 1-f 3, Δ f 2=f 2-f 3, Δ f 4=f 4-f 3, Δ f 5=f 5-f 3The LTE-Advanced subscriber equipment is when synchronous, and the center frequency point that can know the carrier frequency at SCH place is f 3, after the center frequency point difference information by other carrier frequency of BCCH acquisition of information, can calculate the band information f of all carrier frequency 1～f 5
As shown in Figure 3, when all carrier frequency in the system all have separately SCH and during BCCH, the center frequency point information of other carrier frequency of BCCH broadcasting except current carrier frequency that can be by separately is as transmitting carrier frequency information (f in the BCCH of carrier frequency 1 2, f 3, f 4, f 5).After being synchronized to carrier frequency 1, obtains by the LTE-Adavanced subscriber equipment center frequency point f 1, can obtain other frequencies f by BCCH 2～f 5Equally, can transmit by the BCCH of place carrier frequency 1 the center frequency point difference information of other carrier frequency.The LTE-Advanced subscriber equipment is when synchronous, and the center frequency point that can know the carrier frequency at SCH place is f 1, after the center frequency point difference information by other carrier frequency of BCCH acquisition of information, can calculate all carrier frequency band information f 1～f 5
ENB (base station) is scheduling to subscriber equipment and the assignment carrier frequency, and definite main carrier frequency, sends relevant information by high-level signaling to subscriber equipment.As shown in Figure 4, the eNB dispatching distribution is f to the working carrier frequency of a certain subscriber equipment 1, f 3And f 5, determine f 3Be the basic carrier frequency of this subscriber equipment, and give subscriber equipment by high-level signaling transmission working carrier frequency indication information (10101) and basic carrier frequency information (010).Subscriber equipment is after receiving this information, in conjunction with carrier frequency information f 1～f 5Just can know that its working carrier frequency is f 1, f 3And f 5, be f at the basic carrier frequency that can obtain current distribution in conjunction with basic carrier frequency information 3
Embodiment one:
Introduce improved DCI form and carry out blind Detecting for the LTE-Advanced subscriber equipment at basic carrier frequency.Innovative method is exactly to add the carrier frequency that a field is used to indicate this user PDCCH information place in the DCI form of original definition.Originally the DCI form of definition can be the DCI form that defines among the LTE, and/or the new DCI form that is used for non-basic carrier blind detection of introducing of LTE-Advanced system.The DCI form that defines in the LTE in this example is the DCI form of original definition.As shown in Figure 1, system bandwidth comprises 5 carrier frequency, then every kind of DCI form need to add the field of 5 bits, and corresponding improvement DCI form is called after Format0 ', Format1 ', Format1A ', Format1B ', Format1C ', Format1D ', Format2 ' and Format2A ' respectively.
For improved DCI form can be described better, the below elaborates to its each field take Format1A ' as example.
###
DCI form 1A ' (Format1A '), amount to 33 bits, be used for encapsulating the schedule information of single codeword PDSCH, comprise following field:
Format information: 1 bit is used for distinguishing form 0 ' and form 1A ', bit value 0 presentation format 0 ', bit value 1 presentation format 1A ';
Virtual RB (VRB) type information: 1 bit;
Resource allocation information: 13 bits;
Modulation coding mode: 5 bits;
HARQ process information: 3 bits;
New data indication information: 1 bit;
Redundancy version information: 2 bits;
Uplink power control indication information: 2 bits;
PDCCH index information: 5 bits.
***
Format1A ' form is compared with Format1A, has increased the PDCCH index information of 5 bits.Extended formatting is done similar processing.
For the LTE-Advanced subscriber equipment basic carrier frequency carry out DCI form that blind Detecting adopts and transmission mode and between corresponding relation, can be described by following table 2:
Table 2
Transmission mode With reference to the DCI form
1 1’，1A’
2 1’，1A’
3 2A’
4 2’
5 1D’
6 1B’
7 1’，1A’
Above table only is the usefulness of giving an example, and the present invention is not limited in above-mentioned relation.In real system, can do corresponding popularization according to related definition.For example, the transmission mode of LTE-Advanced system may be not limited only to above-mentioned 7 kinds of patterns.
Next, be that the method for LTE-Advanced user equipment allocation PDCCH is described below to eNB:
ENB scheduling LTE-Advanced subscriber equipment distributes the RB resource for it in its working carrier frequency;
If the schedule information of this user's up-downgoing shared channel is arranged at basic carrier frequency, then eNB (for example adopts improved DCI form, form 1A ') control information on the basic carrier frequency of encapsulation, encapsulate control information on other carrier frequency with the DCI form of LTE definition, then according to the assigning process of LTE definition, the control information on each carrier frequency is mapped on the corresponding CCE of each carrier frequency.
Fig. 5 has provided example, the RB resource distribution that eNB is assigned to is on carrier frequency 1 and carrier frequency 3, because carrier frequency 3 is basic carrier frequency of this subscriber equipment, then encapsulate control information on the carrier frequency 3 at carrier frequency 3 usefulness DCI form 1A ', encapsulate control information on the carrier frequency 1 at carrier frequency 1 usefulness DCI form 1A.
If this user's PDCCH information not on basic carrier frequency, then eNB (for example adopts under the current scheduling user equipment mode of operation the minimum DCI form of bit number in the improved DCI form, form 1A ') control information on the basic carrier frequency of encapsulation, other bits outer to PDCCH index information bit in the form do not limit.Similarly, the DCI form that eNB defines with LTE encapsulates the control information on other carrier frequency, then according to the assigning process of LTE definition, the control information on each carrier frequency is mapped on the corresponding CCE of each carrier frequency.
Fig. 6 has provided example, the RB resource distribution that eNB is assigned to is on carrier frequency 1 and carrier frequency 5, because carrier frequency 3 is basic carrier frequency of this subscriber equipment, control information on carrier frequency 3 usefulness DCI form 1A ' encapsulation carrier frequency 3, because not having resource on the carrier frequency 3 distributes, therefore, except PDCCH index information bit ((10001) expression carrier frequency 1 and carrier frequency 5), other bits are that x does not do definition.Encapsulate control information on the carrier frequency separately at carrier frequency 1 and carrier frequency 5 usefulness DCI form 1A.
The subscriber equipment blind detection process can be described below:
The LTE-Advanced subscriber equipment finds the call number of the PDCCH search volume initial CCE in place according to the Hashing algorithm that its C-RNTI adopts LTE to define.
The LTE-Advanced subscriber equipment adopts improved DCI form to carry out blind Detecting in the PDCCH search volume in its basic carrier frequency.
According to the content of PDCCH in the basic carrier frequency that detects, read its field PDCCH index information, in conjunction with its working carrier frequency information, judge the schedule information that this user's up-downgoing shared channel is arranged on which carrier frequency.
If the schedule information of this user's up-downgoing shared channel is arranged on the basic carrier frequency, then read other field contents of PDCCH in the basic carrier frequency, obtain corresponding control information.
According to the PDCCH index information that reads, there is the carrier frequency of schedule information of this user's up-downgoing shared channel to adopt the DCI form of LTE definition to search at its PDCCH to other and carries out blind Detecting in space, obtain corresponding control information.
Be described further below in conjunction with Fig. 5 and Fig. 6.
As shown in Figure 5, the LTE-Advanced subscriber equipment carries out blind Detecting with improved DCI form to basic carrier frequency 3,1A ' correctly solves PDCCH information with the DCI form, draw according to field PDCCH index information content (10100), the schedule information of this user's up-downgoing shared channel is arranged on carrier frequency 1 and the carrier frequency 3.Owing to the schedule information of this user's up-downgoing shared channel is arranged in the basic carrier frequency 3, can obtain the corresponding control information of this subscriber equipment on the basic carrier frequency according to the PDCCH information that solves before.DCI form with the LTE definition carries out blind Detecting to carrier frequency 1, and 1A correctly solves PDCCH information with the DCI form, namely can obtain the control information on the carrier frequency 1.
As shown in Figure 6, the LTE-Advanced subscriber equipment carries out blind Detecting with improved DCI form to basic carrier frequency 3,1A ' correctly solves PDCCH information with the DCI form, draw according to field PDCCH index information content (10001), the schedule information that this user's up-downgoing shared channel is arranged on carrier frequency 1 and the carrier frequency 5, and the schedule information of this user's up-downgoing shared channel not in the basic carrier frequency 3.DCI form with the LTE definition carries out blind Detecting to carrier frequency 1 and carrier frequency 5, and 1A correctly solves PDCCH information with the DCI form, namely can obtain respectively the control information on carrier frequency 1 and the carrier frequency 5.
Particularly, Fig. 8 is LTE-Advanced system transmitter workflow diagram, and in conjunction with Fig. 8, the workflow of base station can be described below:
Step S801:eNB by broadcast channel to LTE-Advanced subscriber equipment transmitting system carrier frequency information;
Step S802:eNB sends working carrier frequency information and basic carrier frequency indication information by high-level signaling to the LTE-Advanced subscriber equipment;
Step S803:eNB is current scheduling user devices allocation resource;
Step S804: adopt improved DCI form to encapsulate control information on the basic carrier frequency;
Step S805: the DCI form that adopts LTE to define encapsulates the control information on other non-basic carrier frequency.
Particularly, Fig. 9 is LTE-Advanced system receiver workflow diagram, and in conjunction with Fig. 9, the workflow of subscriber equipment can be described below:
Step S901: subscriber equipment obtains system's carrier frequency information by broadcast channel;
Step S902: subscriber equipment obtains working carrier frequency information and basic carrier frequency indication information by high-level signaling;
Step S903: subscriber equipment adopts improved DCI form that the control channel on the basic carrier frequency is carried out blind Detecting;
Step S904: subscriber equipment judges whether to detect control information;
Step S905: if subscriber equipment does not detect control information, then this customer equipment data not in this dispatching cycle is not done other processing;
Step S906: if detect this subscriber equipment control information, read the PDCCH index information;
Step S907: according to the PDCCH index information, whether the schedule information of this user's up-downgoing shared channel is arranged on the judgement basis carrier frequency;
Step S908: if the schedule information of this user's up-downgoing shared channel is arranged on the basic carrier frequency, then the Gains resources assignment information reads the data message on the basic carrier frequency;
Step S909: if the schedule information of this user's up-downgoing shared channel not on the basic carrier frequency, then adopt the DCI form of LTE definition to carry out blind Detecting at other non-basic carrier frequency of PDCCH index information indication, the Gains resources assignment information reads the data message on the corresponding carrier frequency.
By above step, distributed the carrier frequency of this user's PDCCH information for basic carrier frequency and each, the maximum blind Detecting number that subscriber equipment need to carry out keeps consistent with the maximum blind Detecting number among the LTE, does not increase the complexity of extra blind Detecting.Effectively saved the transmitting power of subscriber equipment.
Embodiment two:
Introduce improved DCI form and carry out blind Detecting for the LTE-Advanced subscriber equipment at basic carrier frequency.Innovative method is exactly to add the carrier frequency that a field is used to indicate this user PDCCH information place in the DCI form of original definition.The DCI form of described original definition can be the DCI form that defines among the LTE, and/or the new DCI form that is used for non-basic carrier blind detection of introducing of LTE-Advanced system.The DCI form that defines in the LTE in this example is the DCI form of original definition.As shown in Figure 1, system bandwidth comprises 5 carrier frequency, then every kind of DCI form need to add the field of 5 bits, and corresponding improvement DCI form is called after Format0 respectively ", Format1 ", Format1A ", Format1B ", Format1C ", Format1D ", Format2 " and Format2A ".
For improved DCI form can better be described, the below is take Format1A " be its each field to be elaborated example.
###
DCI form 1A " (Format1A "), amount to 33 bits, be used for encapsulating the schedule information of single codeword PDSCH, comprise following field:
Format information: 1 bit is used for distinguishing form 0 " and form 1A ", bit value 0 presentation format 0 ", bit value 1 presentation format 1A ";
Virtual RB (VRB) type information: 1 bit;
Resource allocation information: 13 bits;
Modulation coding mode: 5 bits;
HARQ process information: 3 bits;
New data indication information: 1 bit;
Redundancy version information: 2 bits;
Uplink power control indication information: 2 bits;
PDCCH index information: 4 bits.
***
Format1A " form compares with Format1A, increased the PDCCH index information of 4 bits.Extended formatting is done similar processing.
For the LTE-Advanced subscriber equipment basic carrier frequency carry out DCI form that blind Detecting adopts and transmission mode and between corresponding relation, can be described by following table 3:
Table 3
Transmission mode With reference to the DCI form
1 1”，1A”
2 1”，1A”
3 2A”
4 2”
5 1D”
6 1B”
7 1”，1A”
Above table only is the usefulness of giving an example, and the present invention is not limited in above-mentioned relation.In real system, can do corresponding popularization according to related definition.For example, the transmission mode of LTE-Advanced system may be not limited only to above-mentioned 7 kinds of patterns.
Next, be that the method for LTE-Advanced user equipment allocation PDCCH is described below to eNB:
ENB scheduling LTE-Advanced subscriber equipment distributes the RB resource for it in its working carrier frequency;
If the schedule information of this user's up-downgoing shared channel is arranged at basic carrier frequency, then eNB adopts improved DCI form to encapsulate control information on the basic carrier frequency, encapsulate control information on other carrier frequency with the DCI form of LTE definition, then according to the assigning process of LTE definition, the control information on each carrier frequency is mapped on the corresponding CCE of each carrier frequency.
Figure 12 has provided example, the RB resource distribution that eNB is assigned to is on carrier frequency 1 and carrier frequency 3, because carrier frequency 3 is basic carrier frequency of this subscriber equipment, then at carrier frequency 3 usefulness DCI form 1A " control information of encapsulation on the carrier frequency 3; (whether the resource distribution is arranged on 1000 carrier frequency 1, carrier frequency 2, carrier frequency 4 and the carrier frequency 5 that are used to refer to except basic carrier frequency 3) encapsulates control information on the carrier frequency 1 at carrier frequency 1 usefulness DCI form 1A.
If the schedule information of this user's up-downgoing shared channel not on basic carrier frequency, then eNB adopts under the current scheduling user equipment mode of operation the minimum DCI form of bit number in the improved DCI form to encapsulate control information on the basic carrier frequency, resource allocation information bit in the form is put full 0 be used for representing that basic carrier frequency does not have resource to distribute.Same, the DCI form that eNB defines with LTE encapsulates the control information on other carrier frequency, then according to the assigning process of LTE definition, the control information on each carrier frequency is mapped on the corresponding CCE of each carrier frequency.
Figure 13 has provided example, the RB resource distribution that eNB is assigned to is on carrier frequency 1 and carrier frequency 5, because carrier frequency 3 is basic carrier frequency of this subscriber equipment, at carrier frequency 3 usefulness DCI form 1A " control information of encapsulation on the carrier frequency 3; owing to there is not resource to distribute on the carrier frequency 3, therefore, form 1A " in the resource allocation information bit be 0 entirely, PDCCH index information bit is " 1001 ", expression carrier frequency 1 and carrier frequency 5.Encapsulate control information on the carrier frequency separately at carrier frequency 1 and carrier frequency 5 usefulness DCI form 1A.
The subscriber equipment blind detection process can be described below:
The LTE-Advanced subscriber equipment finds the call number of the PDCCH search volume initial CCE in place according to the Hashing algorithm that its C-RNTI adopts LTE to define.
The LTE-Advanced subscriber equipment adopts improved DCI form to carry out blind Detecting in the PDCCH search volume in its basic carrier frequency.
Content according to PDCCH in the basic carrier frequency that detects, read the resource allocation information bit, if be non-full 0 bit, the schedule information that this user's up-downgoing shared channel is arranged on the basic carrier frequency is described then, read the respective field content of PDCCH in the basic carrier frequency, obtain corresponding control information.
Read its field PDCCH index information, in conjunction with its working carrier frequency information, judge the schedule information that this user's up-downgoing shared channel is arranged on which non-basic carrier frequency.
According to the PDCCH index information that reads, there is the carrier frequency of schedule information of this user's up-downgoing shared channel to adopt the DCI form of LTE definition to search at its PDCCH to other and carries out blind Detecting in space, obtain corresponding control information.
Be described further below in conjunction with Figure 12 and Figure 13.
As shown in figure 12, the LTE-Advanced subscriber equipment carries out blind Detecting with improved DCI form to basic carrier frequency 3, with DCI form 1A " correctly solve PDCCH information; be the schedule information that non-full 0 has this user's up-downgoing shared channel as can be known on the basic carrier frequency according to the resource allocation information bit; then draw according to field PDCCH index information content (1000), the schedule information of this user's up-downgoing shared channel is arranged on the carrier frequency 1.Owing to the schedule information of this user's up-downgoing shared channel is arranged in the basic carrier frequency 3, can obtain the corresponding control information of this subscriber equipment on the basic carrier frequency according to the PDCCH information that solves before.DCI form with the LTE definition carries out blind Detecting to carrier frequency 1, and 1A correctly solves PDCCH information with the DCI form, namely can obtain the control information on the carrier frequency 1.
As shown in figure 13, the LTE-Advanced subscriber equipment carries out blind Detecting with improved DCI form to basic carrier frequency 3, with DCI form 1A " correctly solve PDCCH information; be the as can be known schedule information of this user's up-downgoing shared channel not on the basic carrier frequency of full 0 according to the resource allocation information bit; draw according to field PDCCH index information content (1001), the schedule information of this user's up-downgoing shared channel is arranged on carrier frequency 1 and the carrier frequency 5.DCI form with the LTE definition carries out blind Detecting to carrier frequency 1 and carrier frequency 5, and 1A correctly solves PDCCH information with the DCI form, namely can obtain respectively the control information on carrier frequency 1 and the carrier frequency 5.
Particularly, Figure 14 is LTE-Advanced system transmitter workflow diagram, and in conjunction with Figure 14, the workflow of base station can be described below:
Step S1401:eNB by broadcast channel to LTE-Advanced subscriber equipment transmitting system carrier frequency information;
Step S1402:eNB sends working carrier frequency information and basic carrier frequency indication information by high-level signaling to the LTE-Advanced subscriber equipment;
Step S1403:eNB is current scheduling user devices allocation resource;
Step S1404:eNB is according to the schedule information whether this user's up-downgoing shared channel is arranged on the scheduling result judgement basis carrier frequency;
Step S1405: if the schedule information of this user's up-downgoing shared channel is arranged on the basic carrier frequency, adopt improved DCI form to encapsulate control information on the basic carrier frequency;
Step S1406: if the schedule information of this user's up-downgoing shared channel not on the basic carrier frequency adopts improved DCI form to encapsulate control information on the basic carrier frequency, resource allocation bit is wherein put full 0;
Step S1407: the DCI form that adopts LTE to define encapsulates the control information on other non-basic carrier frequency.
Particularly, Figure 15 is LTE-Advanced system receiver workflow diagram, and in conjunction with Figure 15, the workflow of subscriber equipment can be described below:
Step S1501: subscriber equipment obtains system's carrier frequency information by broadcast channel;
Step S1502: subscriber equipment obtains working carrier frequency information and basic carrier frequency indication information by high-level signaling;
Step S1503: subscriber equipment adopts improved DCI form that the control channel on the basic carrier frequency is carried out blind Detecting;
Step S1504: subscriber equipment judges whether to detect control information;
Step S1505: if subscriber equipment does not detect control information, then this customer equipment data not in this dispatching cycle is not done other processing;
Step S1506: whether the resource allocation information bit is full 0 on the judgement basis carrier frequency;
Step S1507: if the resource allocation information bit is full 0 on the basic carrier frequency, then the Gains resources assignment information reads the data message on the basic carrier frequency;
Step S1508: read the PDCCH index information in the control information that blind check measures;
Step S1509: adopt the DCI form of LTE definition to carry out blind Detecting at other non-basic carrier frequency of PDCCH index information indication, the Gains resources assignment information reads the data message on the corresponding carrier frequency.
By above step, distributed this user's PDCCH information for basic carrier frequency and each, the maximum blind Detecting number that subscriber equipment need to carry out keeps consistent with the maximum blind Detecting number among the LTE, does not increase the complexity of extra blind Detecting.Effectively saved the transmitting power of subscriber equipment.
Embodiment three:
On the basis of above-mentioned improved DCI form, introduce a kind of brand-new DCI form, be used for the LTE-Advanced subscriber equipment and carry out blind Detecting at basic carrier frequency, called after Format X in this example.Only comprise a PDCCH index information in this form, 4 bits.
For the LTE-Advanced subscriber equipment basic carrier frequency carry out DCI form that blind Detecting adopts and transmission mode and between corresponding relation, can be described by following table 4 or table 5:
Table 4
Transmission mode With reference to the DCI form
1 1’，1A’，X
2 1’，1A’，X
3 2A’，X
4 2’，X
5 1D’，X
6 1B’，X
7 1’，1A’，X
Table 5
Transmission mode With reference to the DCI form
1 1”，1A”，X
2 1”，1A”，X
3 2A”，X
4 2”，X
5 1D”，X
6 1B”，X
7 1”，1A”，X
Above table only is the usefulness of giving an example, and the present invention is not limited in above-mentioned relation.In real system, can do corresponding popularization according to related definition.For example, the transmission mode of LTE-Advanced system may be not limited only to above-mentioned 7 kinds of patterns.
ENB is that LTE-Advanced user equipment allocation PDCCH process prescription is as follows:
ENB scheduling LTE-Advanced subscriber equipment distributes the RB resource for it in its working carrier frequency;
If the schedule information of this user's up-downgoing shared channel is arranged at basic carrier frequency, then eNB adopts improved DCI form to encapsulate control information on the basic carrier frequency, encapsulate control information on other carrier frequency with the DCI form of LTE definition, then according to the assigning process of LTE definition, the control information on each carrier frequency is mapped on the corresponding CCE of each carrier frequency.
Fig. 5 has provided example, the RB resource distribution that eNB is assigned to is on carrier frequency 1 and carrier frequency 3, because carrier frequency 3 is basic carrier frequency of this subscriber equipment, then encapsulate control information on the carrier frequency 3 at carrier frequency 3 usefulness DCI form 1A ', encapsulate control information on the carrier frequency 1 at carrier frequency 1 usefulness DCI form 1A.Perhaps Figure 12 has provided example, the RB resource distribution that eNB is assigned to is on carrier frequency 1 and carrier frequency 3, because carrier frequency 3 is basic carrier frequency of this subscriber equipment, then at carrier frequency 3 usefulness DCI form 1A " control information of encapsulation on the carrier frequency 3; (whether the resource distribution is arranged on 1000 carrier frequency 1, carrier frequency 2, carrier frequency 4 and the carrier frequency 5 that are used to refer to except basic carrier frequency 3) encapsulates control information on the carrier frequency 1 at carrier frequency 1 usefulness DCI form 1A.
If the schedule information of this user's up-downgoing shared channel not on basic carrier frequency, then eNB adopts DCI form X to encapsulate control information on the basic carrier frequency.Similarly, the DCI form that eNB defines with LTE encapsulates the control information on other carrier frequency, then according to the assigning process of LTE definition, the control information on each carrier frequency is mapped on the corresponding CCE of each carrier frequency.
Fig. 7 has provided example, the RB resource distribution that eNB is assigned to is on carrier frequency 1 and carrier frequency 5, because carrier frequency 3 is basic carrier frequency of this subscriber equipment, control information on carrier frequency 3 usefulness DCI form X encapsulation carrier frequency 3, because not having resource on the carrier frequency 3 distributes, therefore, control information only comprises PDCCH index information bit " 1001 ", expression carrier frequency 1 and carrier frequency 5.Encapsulate control information on the carrier frequency separately at carrier frequency 1 and carrier frequency 5 usefulness DCI form 1A.
The subscriber equipment blind detection process can be described below:
The LTE-Advanced subscriber equipment finds the call number of the PDCCH search volume initial CCE in place according to the Hashing algorithm that its C-RNTI adopts LTE to define.
The LTE-Advanced subscriber equipment adopts improved DCI form and the new DCI form X that introduces to carry out blind Detecting in the PDCCH search volume in its basic carrier frequency.
If PDCCH is the new DCI form X that introduces in the basic carrier frequency that detects, read the PDCCH index information, having the carrier frequency of schedule information of this user's up-downgoing shared channel to adopt the DCI form of LTE definition to search at its PDCCH to other carries out blind Detecting, obtains corresponding control information in space.
If PDCCH is a kind of in the improved DCI form in the basic carrier frequency that detects, read its field PDCCH index information, in conjunction with its working carrier frequency information, judge the schedule information that this user's up-downgoing shared channel is arranged on which carrier frequency.Read other field contents of PDCCH in the basic carrier frequency, obtain the corresponding control information of this basis carrier frequency.
Be described further below in conjunction with Fig. 5, Figure 12 and Fig. 7.
As shown in Figure 5, the LTE-Advanced subscriber equipment carries out blind Detecting with improved DCI form to basic carrier frequency 3,1A ' correctly solves PDCCH information with the DCI form, draw according to field PDCCH index information content (10100), the schedule information of this user's up-downgoing shared channel is arranged on carrier frequency 1 and the carrier frequency 3.Owing to the schedule information of this user's up-downgoing shared channel is arranged in the basic carrier frequency 3, can obtain the corresponding control information of this subscriber equipment on the basic carrier frequency according to the PDCCH information that solves before.DCI form with the LTE definition carries out blind Detecting to carrier frequency 1, and 1A correctly solves PDCCH information with the DCI form, namely can obtain the control information on the carrier frequency 1.Perhaps as shown in figure 12, the LTE-Advanced subscriber equipment carries out blind Detecting with improved DCI form to basic carrier frequency 3,1A ' correctly solves PDCCH information with the DCI form, be the schedule information that non-full 0 has this user's up-downgoing shared channel as can be known on the basic carrier frequency 3 according to the resource allocation information bit, draw according to field PDCCH index information content (1000), the schedule information of this user's up-downgoing shared channel is arranged on the carrier frequency 1.Owing to the schedule information of this user's up-downgoing shared channel is arranged in the basic carrier frequency 3, can obtain the corresponding control information of this subscriber equipment on the basic carrier frequency according to the PDCCH information that solves before.DCI form with the LTE definition carries out blind Detecting to carrier frequency 1, and 1A correctly solves PDCCH information with the DCI form, namely can obtain the control information on the carrier frequency 1.
As shown in Figure 7, the LTE-Advanced subscriber equipment carries out blind Detecting with improved DCI form to basic carrier frequency 3, X correctly solves PDCCH information with the DCI form, represent in the basic carrier frequency 3 the not schedule information of this user's up-downgoing shared channel, draw according to field PDCCH index information content (1001), the schedule information of this user's up-downgoing shared channel is arranged on carrier frequency 1 and the carrier frequency 5.Then, the DCI form that defines with LTE carries out blind Detecting to carrier frequency 1 and carrier frequency 5, and 1A correctly solves PDCCH information with the DCI form, namely can obtain respectively the control information on carrier frequency 1 and the carrier frequency 5.
Particularly, Figure 10 is LTE-Advanced system transmitter workflow diagram, and in conjunction with Figure 10, the workflow of base station can be described below:
Step S1001:eNB by broadcast channel to LTE-Advanced subscriber equipment transmitting system carrier frequency information;
Step S1002:eNB sends working carrier frequency information and basic carrier frequency indication information by high-level signaling to the LTE-Advanced subscriber equipment;
Step S1003:eNB is current scheduling user devices allocation resource;
Step S1004:eNB is according to the schedule information whether this user's up-downgoing shared channel is arranged on the scheduling result judgement basis carrier frequency;
Step S1005: if the schedule information of this user's up-downgoing shared channel is arranged on the basic carrier frequency, adopt improved DCI form to encapsulate control information on the basic carrier frequency;
Step S1006: if the schedule information of this user's up-downgoing shared channel not on the basic carrier frequency adopts the DCI form X that introduces to encapsulate control information on the basic carrier frequency;
Step S1007: the DCI form that adopts LTE to define encapsulates the control information on other non-basic carrier frequency.
Particularly, Figure 11 is LTE-Advanced system receiver workflow diagram, and in conjunction with Figure 11, the workflow of subscriber equipment can be described below:
Step S1101: subscriber equipment obtains system's carrier frequency information by broadcast channel;
Step S1102: subscriber equipment obtains working carrier frequency information and basic carrier frequency indication information by high-level signaling;
Step S1103: subscriber equipment adopts the DCI form X of improved DCI form and introducing that the control channel on the basic carrier frequency is carried out blind Detecting;
Step S1204: subscriber equipment judges whether to detect control information;
Step S1205: if subscriber equipment does not detect control information, then this customer equipment data not in this dispatching cycle is not done other processing;
Step S1206: if detect this subscriber equipment control information, the control information on the basic carrier frequency of the DCI form X encapsulation that determines whether to introduce;
Step S1207: the control information on the basic carrier frequency of the DCI form X encapsulation of introducing, the schedule information that this user's up-downgoing shared channel is arranged on the basic carrier frequency then is described, the Gains resources assignment information reads the data message on the basic carrier frequency;
Step S1208: read the PDCCH index information in the control information that blind check measures;
Step S1209: adopt the DCI form of LTE definition to carry out blind Detecting at other non-basic carrier frequency of PDCCH index information indication, the Gains resources assignment information reads the data message on the corresponding carrier frequency.
By above step, distributed the carrier frequency of this user's PDCCH information for basic carrier frequency and each, the maximum blind Detecting number that subscriber equipment need to carry out has increased once than the maximum blind Detecting number among the LTE, but compare with the embodiment of front, reduced the redundant bit in the DCI form, the level of resources utilization that has improved PDCCH.
Design and test method by down control channel in the LTE-Advanced set forth above system, the LTE-Advanced subscriber equipment only needs the PDCCH channel on the basic carrier frequency of monitoring in its scheduling subframe, when schedule information is arranged, according to the PDCCH on the corresponding carrier frequency of PDCCH index information blind Detecting.The method simplicity of design is effective, the complexity of system is low, has reduced the power overhead that the user detects control channel, has satisfied the demand of real system and LTE-Advanced subscriber equipment.
Embodiment four:
The ascending resource of a plurality of uplink carrier frequencies of LTE-Advanced subscriber equipment distributes (UL grant) information to adopt improved DCI format mapping on basic carrier frequency, and the working carrier frequency at other non-basic carrier frequency adopts general DCI form to encapsulate the downlink resource assignment information of described LTE-Advanced subscriber equipment simultaneously.
Suppose DCI form 0 *A kind of form that encapsulates the ascending resource assignment information for the LTE-Advanced definition.By adding a PDCCH index field to DCI form 0 *In, form improved DCI form 0 * '
ENB is that the method for LTE-Advanced user equipment allocation PDCCH is described below:
ENB scheduling LTE-Advanced subscriber equipment distributes the RB resource for it in its working carrier frequency;
ENB adopts improved DCI form 0 * 'The ascending resource that encapsulates this one or more up working carrier frequency of subscriber equipment distributes (UL grant) information;
The DCI form that eNB defines with LTE encapsulates the downlink resource assignment information on other carrier frequency;
ENB is mapped to the control information on each carrier frequency on the corresponding CCE of each carrier frequency according to the assigning process of LTE definition.
Figure 16 has provided example, and eNB distributes this user PDCCH information on carrier frequency 1 and carrier frequency 3, because carrier frequency 3 is basic carrier frequency of this subscriber equipment, then at carrier frequency 3 usefulness DCI forms 0 * 'Encapsulate this user's ascending resource assignment information, encapsulate downlink resource assignment information on the carrier frequency 1 at carrier frequency 1 usefulness DCI form 1A.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that those skilled in the art can carry out various other change, replacement and interpolations in the situation that does not break away from the spirit and scope of the present invention.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited by claims.

Claims (18)

1. down control channel distribution method that is used for the base station comprises:
By broadcast channel to subscriber equipment transmitting system carrier frequency information;
Send working carrier frequency information and basic carrier frequency indication information by high-level signaling to subscriber equipment;
Be current scheduling user devices allocation resource;
Adopt improved descending control information format to encapsulate control information on the basic carrier frequency, described improved descending control information format comprises whole fields and the down control channel index information bit of general descending control information format;
Adopt general descending control information format to encapsulate control information on other non-basic carrier frequency.
2. the down control channel distribution method for the base station according to claim 1 is characterized in that:
On basic carrier frequency, adopt the ascending resource assignment information of improved descending control information format encapsulation subscriber equipment, and
On the working carrier frequency of described other non-basic carrier frequency of subscriber equipment, adopt general descending control information format to encapsulate the downlink resource assignment information of described subscriber equipment.
3. the down control channel distribution method for the base station according to claim 1 is characterized in that:
Described general descending control information format is the new descending control information format that is used for encapsulating corresponding control information of introducing of descending control information format and/or LTE-Advanced system that defines in the LTE system.
4. the down control channel distribution method for the base station according to claim 1 also comprises:
According to the schedule information whether the up-downgoing shared channel of current scheduling user equipment is arranged on the scheduling result judgement basis carrier frequency.
5. the down control channel distribution method for the base station according to claim 4 also comprises:
If the schedule information of the up-downgoing shared channel of current scheduling user equipment is arranged on the basic carrier frequency, adopt improved descending control information format to encapsulate control information on the basic carrier frequency;
If there is not the schedule information of the up-downgoing shared channel of current scheduling user equipment on the basic carrier frequency, the descending control information format that employing is introduced encapsulates the control information on the basic carrier frequency.
6. described down control channel distribution method for the base station one of according to claim 1～4 is characterized in that:
If the schedule information of the up-downgoing shared channel of current scheduling user equipment is arranged on the basic carrier frequency, encapsulate whole fields of the general descending control information format in the described improved descending control information format according to general descending control information format,
If there is not the schedule information of the up-downgoing shared channel of current scheduling user equipment on the basic carrier frequency, adopt under the current scheduling user equipment mode of operation the minimum descending control information format of bit number in the improved descending control information format to encapsulate control information on the basic carrier frequency, and whole fields of the general descending control information format in the described improved descending control information format are set arbitrarily
Which carrier frequency the downlink control channel information that described down control channel index information bit is used to indicate current scheduling user equipment is positioned on.
7. described down control channel distribution method for the base station one of according to claim 1～4 is characterized in that:
If the schedule information of the up-downgoing shared channel of current scheduling user equipment is arranged on the basic carrier frequency, encapsulate whole fields of the general descending control information format in the described improved descending control information format according to general descending control information format,
If there is not the schedule information of the up-downgoing shared channel of current scheduling user equipment on the basic carrier frequency, adopt under the current scheduling user equipment mode of operation the minimum descending control information format of bit number in the improved descending control information format to encapsulate control information on the basic carrier frequency, and the resource allocation information field of the general descending control information format to the described improved descending control information format of major general sets to 0
Which carrier frequency the downlink control channel information that described down control channel index information bit is used to indicate current scheduling user equipment is positioned on.
8. the down control channel distribution method for the base station according to claim 5 is characterized in that:
If the schedule information of the up-downgoing shared channel of current scheduling user equipment is arranged on the basic carrier frequency, encapsulate whole fields of the general descending control information format in the described improved descending control information format according to general descending control information format,
Which carrier frequency the downlink control channel information that described down control channel index information bit is used to indicate current scheduling user equipment is positioned on,
The descending control information format of described introducing only comprises described down control channel index information bit.
9. described down control channel distribution method for the base station one of according to claim 1～5 also comprises:
Assigning process according to the LTE definition is mapped to the control information on each carrier frequency on the corresponding control channel of each carrier frequency unit.
10. described down control channel distribution method for the base station one of according to claim 1～5 also comprises:
Send Downlink Control Information on each carrier frequency to subscriber equipment.
11. described down control channel distribution method for the base station one of according to claim 1～5 is characterized in that:
Described down control channel distribution method for the base station is applicable to the LTE-Advanced system.
12. a down control channel blind checking method that is used for subscriber equipment comprises:
By broadcast channel, obtain system's carrier frequency information;
By high-level signaling, obtain working carrier frequency information and basic carrier frequency indication information;
Adopt the descending control information format of improved descending control information format and introducing that the control channel on the basic carrier frequency is carried out blind Detecting, described improved descending control information format comprises whole fields and the down control channel index information bit of general descending control information format;
Judge whether to detect control information;
If detect the control information for this subscriber equipment, read the down control channel index information bit that comprises in the descending control information format of improved descending control information format or introducing;
According to down control channel index information bit, whether the schedule information of the up-downgoing shared channel of this subscriber equipment is arranged on the judgement basis carrier frequency;
If the schedule information of the up-downgoing shared channel of this subscriber equipment is arranged on the basic carrier frequency, then the Gains resources assignment information reads the data message on the basic carrier frequency.
13. the down control channel blind checking method for subscriber equipment according to claim 12 also comprises:
If the schedule information of the up-downgoing shared channel of this subscriber equipment not on the basic carrier frequency, then adopt general descending control information format to carry out blind Detecting at other indicated non-basic carrier frequency of down control channel index information bit, the Gains resources assignment information reads the data message on the corresponding carrier frequency.
14. the down control channel blind checking method for subscriber equipment according to claim 12 also comprises:
If do not detect the control information for this subscriber equipment, then this customer equipment data not in this dispatching cycle finishes to work as pre-treatment, waits for next dispatching cycle.
15. described down control channel blind checking method for subscriber equipment one of according to claim 12～14 is characterized in that:
If the schedule information of the up-downgoing shared channel of this subscriber equipment is arranged on the basic carrier frequency, then whole fields of the general descending control information format in the described improved descending control information format encapsulate according to general descending control information format,
If the schedule information of the up-downgoing shared channel of this subscriber equipment not on the basic carrier frequency, then whole fields of the general descending control information format in the described improved descending control information format are to arrange arbitrarily,
Which carrier frequency the downlink control channel information that described down control channel index information bit is used to indicate this subscriber equipment is positioned on, and
The descending control information format of described introducing only comprises described down control channel index information bit.
16. described down control channel blind checking method for subscriber equipment one of according to claim 12～14 is characterized in that:
If the schedule information of the up-downgoing shared channel of this subscriber equipment is arranged on the basic carrier frequency, then whole fields of the general descending control information format in the described improved descending control information format encapsulate according to general descending control information format,
If the schedule information of the up-downgoing shared channel of this subscriber equipment not on the basic carrier frequency, then the control information on the basic carrier frequency is to adopt under this subscriber equipment mode of operation that the minimum descending control information format of bit number encapsulates in the improved descending control information format, and the resource allocation information field of the general descending control information format in the described at least improved descending control information format is set to 0
Which carrier frequency the downlink control channel information that described down control channel index information bit is used to indicate this subscriber equipment is positioned on, and
The descending control information format of described introducing only comprises described down control channel index information bit.
17. described down control channel blind checking method for subscriber equipment one of according to claim 12～14 is characterized in that:
Described general descending control information format is the new descending control information format that is used for encapsulating corresponding control information of introducing of descending control information format and/or LTE-Advanced system that defines in the LTE system.
18. described down control channel blind checking method for subscriber equipment one of according to claim 12～14 is characterized in that:
Described down control channel blind checking method for subscriber equipment is applicable to the LTE-Advanced system.
CN2008101727037A 2008-11-03 2008-11-03 Descending control channel assignment and blind test method Expired - Fee Related CN101730139B (en)

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