CN104144502B - Physical down control information acquisition methods, device, terminal and system - Google Patents
Physical down control information acquisition methods, device, terminal and system Download PDFInfo
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Abstract
The invention discloses a kind of physical down control information acquisition methods, device, terminal and system, it is related to LTE technical fields.In this method, UE is after detection common control information, when detecting its user proprietary control information, its E_PDCCH addressing group configured information is first detected in PDCCH region, blind Detecting is carried out to its user proprietary control information according to the search space that the addressing information detected finds E PDCCH.It this method provide the mode that a kind of dynamic signaling configuration is combined with high-rise semi-static signal deployment, E PDCCH addressing is carried out to indicate, and deep exploitation UE feeds back to channel status estimated information, multiple users in similar area are organized into groups, the expense of information instruction is saved, the capacity of physical control channel is improved.In the case of control channel inadequate resource but traffic channel resource abundance, the application can neatly provide more control channel resources.
Description
Technical field
The present invention relates to LTE（Long Term Evolution, Long Term Evolution）Technical field, more particularly to a kind of physics
Downlink Control Information acquisition methods, terminal and system.
Background technology
3GPP LTE systems are 3G（3rd Generation, 3-G (Generation Three mobile communication system)）Long Term Evolution version.Mesh
Its preceding standard formulation situation is Release（Version）8（Rel.8）Version and the Rel.9 versions being slightly changed on the basis of Rel.8
This relative maturity.And follow-up LTE Rel.10 versions are larger with respect to Rel.8 and Rel.9 revisions because of it, 3GPP claims
The version and later release are LTE-A（LTE-Advanced）The enhancing version of system, i.e. LTE, it is proposed that more competitive
System performance index.Current Rel.10 release criterias have been freezed, and the research of Rel.11 release criterias has been started up with defining work,
Just under discussion.
The LTE and descending use OFDMA of lte-a system（Orthogonal Frequency Division Multiple
Access, OFDM）Technology, in up direction using the relatively low SC-FDMA of peak-to-average force ratio（Single Carrier-
Frequency Division Multiple Access, single-carrier frequency division multiple access）Technology.In addition, many days used in system
Line technology（MIMO：Multiple Input Multiple Output）Increase there is provided spatial multiplex gains and transmitting diversity
Benefit.Therefore, LTE and lte-a system available resources include the dimensions such as time domain, frequency domain and spatial domain, and base station passes through scheduling and resource point
With algorithm, the channel information based on intra-cell users flexibly reasonably distributes suitable time slot, PRB for user（Physical
Resource Block, Physical Resource Block）、MCS（Modulation and Coding Scheme, modulating-coding form）, hair
Power, MIMO transmission scheme etc. are penetrated, to improve throughput of system, while meeting the rate requirement of Cell Edge User.
In LTE and lte-a system, the control signaling information of down channel is with various types of DCI（Downlink
Control Information, Downlink Control Information）Transmission, these DCI pass through PDCCH（Physical Downlink
Control Channel, Physical Downlink Control Channel）Middle carrying.Communication of the DCI information to downlink be it is very crucial,
DCI information is only correctly parsed, the transmission of demodulating and decoding downlink data information could be further gone, therefore can terminal correct
Receive DCI information and determine that can down data links accurately be communicated.
In the 10ms frame structures that LTE and lte-a system are defined, one TTI of 1ms descending sub frames correspondence（Transmission
Time Interval, Transmission Time Interval）.In a TTI, n before being taken in PDCCH time domains（0<n<=3, n are integer）It is individual
OFDM（Orthogonal Frequency Division Multiplexing, OFDM）Symbol, is accounted on frequency domain
Use whole system bandwidth.Other channels include such as reference signal, PCFICH（Physical Control Format
Indicator Channel, Physical Control Format Indicator Channel）、PHICH（Physical HARQ Indicator
Channel, Physical HARQ Indicator Channel）Deng.Therefore in each of the lower in row subframe, the reserved running time-frequency resource of only limited quantity can
For Downlink Control Information transmission, that is, the PDCCH for carrying DCI information can be very limited amount of with running time-frequency resource.
The least unit of PDCCH resource distribution is CCE（Control Channel Element, control channel element）, 1
Individual CCE includes 9 REG（Resource Element Group, resource element groups）, and a REG includes 4 RE
（Resource Element, resource element）, therefore a CCE contains 36 RE.LTE and LTE-A standards regulation allows CCE
There are four kinds of AL（Aggregation Level, polymerization grade）, AL=1,2,4 and 8 correspond to a PDCCH channel and accounted for simultaneously respectively
With 1,2,4 or 8 CCE.
Different according to the DCI types of transmission, PDCCH includes two class search spaces, CSS（Common Search Space,
Public search space）And USS（UE-specific Search Space, user-specific search space）.CSS positions are fixed
, the public part descending control signaling of all users in transmission cell, such as paging information, system information and Stochastic accessing ring
Answer information etc.；And USS is used to transmit the information related to specific user, as above, downlink resource distribute, the signaling such as Power Control.
In downlink transfer, each UE can be detected after each subframe is received in CSS and USS spaces using the method for blind Detecting
Common control information and the peculiar control information of user.
PDCCH is the physical control information of LTE and lte-a system downlink data transmission, and UE connects to the correct of downlink data
Receive, depend heavily on the correct detection to PDCCH.Therefore, PDCCH accurate delivery is with receiving the normal operation to system extremely
Close important.As it was previously stated, the running time-frequency resource that a sub- frame in can be used to transmit PDCCH is limited, at most it is only capable of 3 before full bandwidth
Transmitted in individual OFDM symbol, in these only resources, also to remove other as transmitted PCFICH, PHICH and reference letter
Part resource shared by number, therefore the resource that PDCCH can be transmitted is more limited.
On the other hand, it is guarantee LTE and the coverage and cell edge transmission rate of lte-a system, this is required more
Transmitted for reliable PDCCH.If current domestic telecommunication operator builds LTE and lte-a system, its available radio spectrum is only remained
The high frequency spectrum such as 2.1GHz, 2.6GHz, its signal attenuation is rapid.And for the consideration of Cost Problems, operator's majority all can
Selection utilization builds LTE/LTE-A networks in existing site resource, and this requires more accurate more effectively control information transmission.
In addition in the case where channel quality is poor, the transmission to cell UE especially its PDCCH of cell edge UE is also required to more
Resource.Therefore, PDCCH resource is of great rarity, and needs enhancing badly.
In order to solve this problem, being proposed in 3GPP LTE R11 standard formulations work strengthens PDCCH.At present
The common recognition that 3GPP reaches is, in R11 standards, keeps existing physical layer frame structure constant, retains the tradition of R8-R10 versions
While PDCCH domains ensure backward compatibility, the part resource in PDSCH domains is used to transmit PDCCH information, its advantage
The available resources of downlink control signaling are the increase in, while the anti-interference of the technologies such as wave beam forming enhancing signal can be utilized
Performance, improves the coverage of control signaling transmission.This method is named as E-PDCCH（Enhanced PDCCH, enhanced thing
Manage down control channel）, i.e., enhanced down control channel.
Need to solve a major issue in E-PDCCH, i.e., for R11UE, how in PDSCH domains to address its right
The control signaling answered.In R8-R10 versions in tradition PDCCH domains, UE by a relevant CCE polymerization grade, subframe number and
Cell identity identification number（C-RNTI）A hash function, the start bit of its corresponding descending control signaling can be addressed to
Put, proceed by blind Detecting.When control signaling is transmitted in PDSCH domains, this mode is impossible, it is therefore necessary to right
Traditional control signaling addressing system makes a change, to adapt to the situation that control signaling is transmitted in PDSCH domains.If it is indicated which
Individual UE control signaling is transmitted in which PDSCH resource, must just increase corresponding indication signaling.This indication signaling increase
Mode have two kinds of selections, one kind is by high-level signaling（Such as RRC signaling）The corresponding resource of semi-static scheduling；It is another to be
By dynamically increasing corresponding indication signaling in each subframe.
The method being semi-statically configured, by high-rise configuration signal, time-frequency resource allocating is fixed to the UE by certain in PDSCH,
Resource without taking PDCCH again is scheduled.The expense of PDCCH resource is this method save, is while dispatching more UE
There is provided possible.But the high-level signaling update cycle is longer, it is meant that if being assigned as mono- piece of PDSCH resource of some UE is used to transmit
Descending control signaling, this block resource will remain assigned to this UE until the renewal of high-level signaling next time.It is this ineffective
Source scheduling mode living has the risk of certain wasting of resources, particularly when UE only needs to the situation of less control signaling.Separately
When one shortcoming is exactly high-level signaling config update, can produce signaling obscure subframe, that is, UE do not know accurately this
That subframe updates high-level signaling, can influence the dispatching effect of control signaling.Therefore, the high-rise method being semi-statically configured can not be real
Existing running time-frequency resource carries out dynamic dispatching according to business demand, can reduce the dispatching efficiency of running time-frequency resource.
PDSCH resources are dynamically transferred by the signaling carried in each subframe, it is necessary to will match somebody with somebody in every subframe for UE
Corresponding instruction resource is put, to notify its control signaling of UE present position in PDSCH resources.Because the instruction resource still will
The part resource in traditional PDCCH domains is occupied, therefore it is required that the configured information need to only include necessary information, even if such as
This, the configured information also will at least include resource location and indicate, the information such as size instruction and modulation coding mode shared by resource,
These information are about the half of common DCI information contained, therefore shared resource overhead can not possibly be too small.E-PDCCH design
Target seeks to extend the resource that control signaling can be transmitted, to solve the capacity problem that control channel may face.The dynamic
Although control channel signaling is put into PDSCH domains and transmitted by resource indicating mode, it is due to the resource spent by dynamic instruction
It is also very big, therefore when activity UE numbers are more in cell, which still can not solve control channel and face
Capacity problem, because excessive PDSCH resource transmissions control information is occupied data traffic channels can be caused to produce on the contrary
Capacity limitation problem.
The content of the invention
The inventors found that above-mentioned have problem in the prior art, and at least one be therefore directed in described problem
Individual problem proposes a kind of new technical scheme.
It is an object of the present invention to provide a kind of technical scheme obtained for physical down control information.
According to the first aspect of the invention there is provided a kind of physical down control information acquisition methods, including：
Terminal obtains grouping information by high-level signaling, and grouping information includes the transmission group mark where terminal；
E-PDCCH addressing group configured information in the PDCCH region detection transmission group of subframe is identified according to transmission group；
The E-PDCCH search spaces address that group's configured information determines terminal is addressed according to E-PDCCH;
The proprietary descending control letter of user of terminal is detected in the E-PDCCH of subframe according to E-PDCCH search spaces address
Breath.
Alternatively, this method also includes：
eNB（Evolved Node B, evolved base station）According to channel feedback information, the similarity of wireless propagation environment and
Terminal is divided into different transmission groups by the distance in geographical position；
Grouping information is sent to terminal by eNB by high-level signaling.
Alternatively, this method also includes：PDCCH public search space public control to down channel of the terminal in subframe
Information is detected.
Alternatively, grouping information also includes：Terminal number in transmission group, terminal sequence number in transmission group.
Alternatively, the E-PDCCH addressing group instruction in the PDCCH region detection transmission group of subframe is identified according to transmission group
Information includes:
Transmission group is identified as the input of group's configured information hash function and determine that the E-PDCCH of transmission group addresses group
Configured information is in the PDCCH region position of subframe；
The E-PDCCH for detecting transmission group according to position addresses configured information.
Alternatively, E-PDCCH, which addresses group's configured information, includes indicating bit, to indicate the user of each terminal in transmission group
Whether proprietary Downlink Control Information transmits in subframe.
Alternatively, this method also includes：
ENB is semi-statically configured by high-level signaling, switch E-PDCCH addressing group configured information；
When closing E-PDCCH addressing group's configured informations, eNB is searched for by the E-PDCCH of high-level signaling instruction terminal
Space；
When opening E-PDCCH addressing group's configured informations, it is dynamic that eNB addresses group's configured information by E-PDCCH
Indicate the E-PDCCH search spaces of group endpoints.
Alternatively, this method also includes：Downlink resource retains original PDCCH region, the common control information of all terminals
Still distribute in PDCCH public search space；User's private downlink control information of early version terminal is distributed in PDCCH areas
Transmit in domain；User's private downlink control information of redaction terminal is then distributed in E-PDCCH area transmissions.
According to another aspect of the present invention there is provided a kind of Downlink Control Information acquisition device, including：
Transmission group identifier acquisition module, for obtaining grouping information by high-level signaling, grouping information is included where terminal
Transmission group mark；
Group's configured information detection module, transmission group is detected for the PDCCH region according to transmission group mark in subframe
E-PDCCH addressing group configured information；
Search space address determination module, for addressing the E-PDCCH that group's configured information determines terminal according to E-PDCCH
Search space address;
Proprietary control information detection module, for being detected according to E-PDCCH search spaces address in the E-PDCCH of subframe
The proprietary Downlink Control Information of user of terminal.
Alternatively, the device also includes：Common control information detection module, it is empty for the PDCCH common search in subframe
Between the common control information of down channel is detected.
Alternatively, E-PDCCH, which addresses group's configured information, includes indicating bit, to indicate the user of each terminal in transmission group
Whether proprietary Downlink Control Information transmits in subframe.
Alternatively, grouping information also includes：Terminal number in transmission group, terminal sequence number in transmission group.
According to another aspect of the invention there is provided a kind of terminal, including above-mentioned Downlink Control Information acquisition device.
System, including terminal described above are obtained there is provided a kind of Downlink Control Information in accordance with a further aspect of the present invention, with
And eNB；Terminal is divided into difference by eNB according to the distance in channel feedback information, the similarity of wireless propagation environment and geographical position
Transmission group；Grouping information is sent to by terminal by high-level signaling.
An advantage of the present invention is that with indicating the E-PDCCH search spaces of multiple terminals by group's configured information
Location, so as to reduce the occupancy to PDCCH resource, improves the efficiency of the utilization of resources.
By referring to the drawings to the detailed description of the exemplary embodiment of the present invention, further feature of the invention and its
Advantage will be made apparent from.
Brief description of the drawings
The accompanying drawing for constituting a part for specification describes embodiments of the invention, and is used to solve together with the description
Release the principle of the present invention.
Referring to the drawings, according to following detailed description, the present invention can be more clearly understood from, wherein：
Figure 1A shows conventional downstream resource allocation schematic diagram.
Figure 1B shows the downlink resource distribution schematic diagram with E-PDCCH.
Fig. 1 C show the distribution signal of dynamic instruction downlink resource.
Fig. 2 shows the flow chart of one embodiment of the physical down control information acquisition methods according to the present invention.
Fig. 3 shows the flow chart of another embodiment of the physical down control information acquisition methods according to the present invention.
Fig. 4 shows the flow chart of another embodiment of the physical down control information acquisition methods according to the present invention.
Fig. 5 shows one embodiment of compatible old version terminal in the physical down control information acquisition methods according to the present invention
Flow chart.
Fig. 6 shows to be semi-statically configured downlink resource distribution schematic diagram according to the dynamic bind of an example of the invention.
Fig. 7 shows the structure chart of one embodiment of the physical down control information acquisition device according to the present invention.
Fig. 8 shows the structure chart of another embodiment of the physical down control information acquisition device according to the present invention.
Embodiment
The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that：Unless had in addition
Body illustrates that the part and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments does not limit this
The scope of invention.
Simultaneously, it should be appreciated that for the ease of description, the size of the various pieces shown in accompanying drawing is not according to reality
Proportionate relationship draw.
The description only actually at least one exemplary embodiment is illustrative below, never as to the present invention
And its any limitation applied or used.
It may be not discussed in detail for technology, method and apparatus known to person of ordinary skill in the relevant, but suitable
In the case of, the technology, method and apparatus should be considered as authorizing a part for specification.
In shown here and discussion all examples, any occurrence should be construed as merely exemplary, without
It is as limitation.Therefore, the other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent accompanying drawing in individual accompanying drawing.
Fig. 2 shows the flow chart of one embodiment of the physical down control information acquisition methods according to the present invention.
As shown in Fig. 2 step 202, terminal obtains grouping information by high-level signaling, grouping information is included where terminal
Transmission group is identified.
Step 204, terminal identifies according to transmission group and addresses group in the E-PDCCH of the PDCCH region detection transmission group of subframe
Group configured information.
To belong to the UE of same transmission group Downlink Control Information be multiplexed into same E-PDCCH resources transmit, and
PDCCH region transmits the addressing information of the E-PDCCH, including resource location distribution information, resource allocation type information etc..Correspondence
The side that the PDCCH addressing of group's configured information of different transmission groups can be addressed using similar traditional PDCCH Downlink Control Information
Formula.
Step 206, terminal addresses the E-PDCCH search spaces address that group's configured information determines terminal according to E-PDCCH;
Step 208, terminal detects that the user of terminal is proprietary descending according to E-PDCCH search spaces address in E-PDCCH
Control information.After eNB is grouped to UE, UE belongs to certain transmission group.But it is not every height for some particular UE
Frame has UE proprietary control informations, therefore, and a configured information can notify UE, and whether it is necessary to continue to detect E-PDCCH.
Whether transmission can for example lead to certain UE in same transmission group in E-PDCCH addressing group configured information in certain specific sub-frame
One 4 or 5bit information is crossed to indicate.4bit can accommodate not more than 16 users, and 5bit can accommodate not more than 32 use
Family.Specific 4bit or 5bit is configured by high-rise RRC signaling.
In above-described embodiment, the E-PDCCH search spaces address of multiple terminals is indicated by group's configured information, to descending
Control channel is strengthened, and control channel capacity is improved, so as to reduce the occupancy to PDCCH resource, it is to avoid resource is excessively unrestrained
Take, improve the efficiency of the utilization of resources.
In one embodiment, in same transmission group all UE to common E-PDCCH addressing informations, by with tradition
PDCCH information addressing system identicals hash function indicates, transmission group group information with a mark similar with UE information, so as to
It is used as the input of hash function.Wherein, information is distributed for resource location, can be using the method quantified.It is small in each subframe
The transmission group number in area will not be more than N（N, which can be fixed, is taken as 23 or 24）It is individual.The method of salary distribution presses descending PDSCH resources
N number of region is divided into according to frequency, each region can at most have on frequency domain from original positionIndividual subcarrier region
E-PDCCH can be carried.Therefore, in E-PDCCH addressing information, its E-PDCCH downlink resources distributed distribution information institute
The bit number is needed to be：
Former downlink resource distributes required bit numberAnd aforesaid way is utilized, downlink resource distribution
Required bit number is
Fig. 3 shows the flow chart of another embodiment of the Downlink Control Information acquisition methods according to the present invention.
As shown in figure 3, step 302, eNB is grouped to terminal, by grouping information periodically through high-level signaling（Such as
RRC signaling）It is sent to each terminal.Grouping information includes terminal number, terminal in the transmission group mark where terminal, transmission group
Sequence number in transmission group etc..For example, eNB divides transmission group to Mobile Forms redaction UE.The channel fed back according to Mobile Forms UE
Status information, eNB sides are similar by the direction of propagation, and dissemination channel situation is similar（Geographical position is approximate）UE be subdivided into a transmission
Group.Packet situation is periodically updated by high-rise RRC signaling, and group where UE is notified into UE.
Step 304, terminal obtains grouping information by high-level signaling.
Step 306, terminal detects the common control information to down channel in the PDCCH of subframe public search space.
When eNB sends downlink data in lte-a system, it is empty that public search space still reuses the common search distributed in PDCCH domains
Between.
Step 308, terminal identifies according to transmission group and addresses group in the E-PDCCH of the PDCCH region detection transmission group of subframe
Group configured information.
Step 310, terminal addresses the E-PDCCH search spaces address that group's configured information determines terminal according to E-PDCCH;
Step 312, terminal detects that the user of terminal is proprietary descending according to E-PDCCH search spaces address in E-PDCCH
Control information.
In one embodiment, eNB passes through high-level signaling（Such as RRC signaling）It is semi-statically configured, switchs above-mentioned dynamic group
Configured information.When closing group's configured information, eNB indicates UE E-PDCCH search spaces by high-level signaling.As unlatching group
During group configured information, eNB dynamically indicates its E-PDCCH search space of group UE by group's configured information.
In lte-a system, when distributing UE proprietary control informations, eNB opens up E-PDCCH resources in PDSCH resources to be put
Put redaction UE proprietary control information.According to redaction UE channel estimation, UE is divided into some transmission groups.In a transmission
The control information of UE in group is placed on same region and each UE is obtained it wherein with certain resource mapping method
Corresponding control information.ENB puts the addressing configured information in transmission group E-PDCCH spaces according to rule according to transmission group information
In respective resources in PDCCH region.ENB can choose whether to open group's configured information work(according to channel estimation case
Can, if closing, redaction UE E-PDCCH search spaces address passes through high-level signaling（Such as RRC signaling）Indicate.
Fig. 4 shows the flow chart of another embodiment of the Downlink Control Information acquisition methods according to the present invention.
As shown in figure 4, step 402, new edition UE receives descending list frame data.
Step 404, new edition UE detects PCFICH symbolic numbers, and symbolic number can be 1,2 or 3.
Step 406, redaction UE detects the common control information of PDCCH public search spaces.
Step 408, redaction UE judges whether group's indicating on-off state is opened according to high-level signaling, if opening, continues
Step 410, otherwise, UE knows its E-PDCCH search spaces address information by high-level signaling, continues step 412.
Step 410, E-PDCCH addressing group configured information is found in the transmission group where group's configured information；It is right
Addressing information detected, obtains in the group having distributed in E-PDCCH in the group in E-PDCCH address informations and present sub-frame
The UE sequence numbers of proprietary control information.If the UE judges do not have the transmission of its Downlink Control Information in the subframe, no longer enter
Row detection, waits the beginning of next subframe.
Step 412, if there is the transmission of its Downlink Control Information in the E-PDCCH regions that the UE judges in the subframe, connecing
After the total data for receiving the subframe, it is empty that UE finds its E-PDCCH search using E-PDCCH address informations in the group having detected that
Between address and to its Downlink Control Information carry out blind Detecting, obtain its user's private downlink control information.
Step 414, determine whether PDSCH data transfers, if nothing, continue step 402, otherwise, continue step 416.
Step 416, PDSCH information is demodulated according to DCI information.
Step 418, UE transmission group information updatings are determined whetherIf so, then continuing step 420, otherwise, continue step
402。
Step 420, transmission group information in UE areas in current high-rise RRC signaling is updated, continues step 408.
In one embodiment, redaction UE and early version UE Downlink Control Information is individually placed to two regions.
Downlink resource still retains original PDCCH region, and early version UE Downlink Control Information is still being distributed in the area
Domain is transmitted, so as to meet backwards compatibility.Redaction UE Downlink Control Information is then distributed in E-PDCCH area transmissions.E-
PDCCH takes a part for original PDSCH region resource.All UE common control information is still distributed in the public of PDCCH
In search space.
For early version UE, when detecting Downlink Control Information in UE sides, early version UE detected rules are without changing, and eNB is pressed
Early version UE user proprietary control information is placed according to early stage revision scheme.
Fig. 5 shows the stream of one embodiment of compatible old version terminal in the Downlink Control Information acquisition methods according to the present invention
Cheng Tu.
As shown in figure 5, step 502, early version UE receives descending list frame data.
Step 504, early version UE detects PCFICH symbolic numbers, and symbolic number can be 1,2 or 3.
Step 506, early version UE indicates to detect the common control information of PDCCH public search spaces according to symbolic number.
Step 508, the proprietary search space PDCCH information of UE is determined whetherIf so, continuing step 510, otherwise, continue
Step 512.
Step 510, indicate that carrying out the proprietary search space PDCCH of UE detects according to symbolic number.
Step 512, PDSCH data transfers are determined whetherIf so, then continuing step 514, otherwise, continue step 502.
Step 514, PDSCH information is demodulated according to DCI information.
In one embodiment, when early version UE user proprietary control information and E-PDCCH addressing group indicate to believe
During breath conflict, the former is abandoned.Because the UE that group's configured information has a group needs the information, therefore has higher priority
It is more reasonable.
Fig. 6 shows to be semi-statically configured downlink resource distribution schematic diagram according to the dynamic bind of an example of the invention.Such as Fig. 6
Shown, terminal 1,2,3 shares E-PDCCH addressing configured information, and terminal 4,5,6 shares E-PDCCH addressing configured information.With
Prior art is compared, and reduces the PDCCH resource spent by dynamic instruction.
Fig. 7 shows the structure chart of one embodiment of the Downlink Control Information acquisition device according to the present invention.Such as Fig. 7 institutes
Show, the device includes：Transmission group identifier acquisition module 71, for obtaining grouping information by high-level signaling, grouping information includes
Transmission group mark where terminal；Group's configured information detection module 72, for being identified according to transmission group in the PDCCH areas of subframe
The E-PDCCH addressing group configured information of domain detection transmission group；Search space address determination module 73, for according to E-PDCCH
Addressing group configured information determines the E-PDCCH search spaces address of terminal;Proprietary control information detection module 74, for basis
The proprietary Downlink Control Information of user of terminal is detected in the E-PDCCH of subframe in E-PDCCH search spaces address.Grouping information is also
Including terminal number in transmission group, terminal sequence number in transmission group.
In one embodiment, E-PDCCH, which addresses group's configured information, includes indicating bit, to indicate each end in transmission group
Whether the proprietary Downlink Control Information of user at end transmits in subframe.
Fig. 8 shows the structure chart of another embodiment of the Downlink Control Information acquisition device according to the present invention.Such as Fig. 8 institutes
Show, the device includes transmission group identifier acquisition module 71, common control information detection module 85, group's configured information detection module
72nd, search space address determination module 73 and proprietary control information detection module 74.Wherein, common control information detection module
85, the common control information of down channel is detected for the PDCCH public search spaces in subframe.
Compared with the prior art, the disclosure allows sub- frame in its downlink of lte-a system neatly to provide more
Many control channel resources, each embodiment has following some or all of advantage and effect：
In the case of control channel inadequate resource but traffic channel resource abundance, the application can be provided neatly more
Control channel resource.This method is extended to existing down control channel resources, is total to relatively sufficient downlink
Enjoying channel resource is supplied to control channel to use, and the resource of down control channel is added in a kind of flexible mode, is improved
The capacity of system.
The disclosure additionally provides the mode that a kind of dynamic signaling configuration is combined with high-rise semi-static signal deployment, is controlled
The extension of channel processed is indicated.Avoid signaling update cycle length and signaling that simple high-rise semi-static signal deployment brought more
The problem of signaling is fuzzy when new, it is excessive to it also avoid the indication signaling expense that simple dynamic configuration brought, capacity boost effect
Unconspicuous problem.Which combines high-rise semi-static signal deployment and saves addressing instruction resource and dynamic signaling configuration often
The advantage that TTI updates, lifting control channel capacitance effect is obvious.
The disclosure method also deep exploitation UE feeds back to channel status estimated information, and multiple users in similar area are entered
Row marshalling, using its channel conditions it is similar the characteristics of, their Downlink Control Information is placed on one piece of common E-PDCCH region
It is interior, propagated using methods such as wave beam formings, while the overlay area of control channel can be improved, save information instruction
Expense, improves the capacity of control channel.
On the covering sex chromosome mosaicism of group's configured information, because group's configured information bit number of design is less, work as simultaneously
During using larger CCE polymerization grades, it has low-down code check, with preferable coverage property, and its coverage distance can be with
Coverage distance more than E-PDCCH, therefore covering is not the bottleneck of group's configured information.
The disclosure is configurable in system operation.When wireless propagation environment changes, system can be to this
Group's configured information function is switched, to adapt to wireless environment, adds the reliability of system.
Earlier version UE is taken into account simultaneously, there is backwards compatibility to it, change systematic cost is relatively low.
So far, it is described in detail according to the physical down control information acquisition methods of the present invention, device, terminal and is
System.In order to avoid the design of the masking present invention, some details known in the field are not described.Those skilled in the art according to
Above description, completely it can be appreciated how implementing technical scheme disclosed herein.
The method and system of the present invention may be achieved in many ways.For example, can by software, hardware, firmware or
Software, hardware, firmware any combinations come realize the present invention method and system.The said sequence of the step of for method is only
Order described in detail above is not limited in order to illustrate, the step of method of the invention, is especially said unless otherwise
It is bright.In addition, in certain embodiments, the present invention can be also embodied as recording to program in the recording medium, these programs include
Machine readable instructions for realizing the method according to the invention.Thus, the present invention also covering storage is used to perform according to this hair
The recording medium of the program of bright method.
Although some specific embodiments of the present invention are described in detail by example, the skill of this area
Art personnel are it should be understood that above example is merely to illustrate, the scope being not intended to be limiting of the invention.The skill of this area
Art personnel to above example it should be understood that can modify without departing from the scope and spirit of the present invention.This hair
Bright scope is defined by the following claims.
Claims (13)
1. a kind of Downlink Control Information acquisition methods, it is characterised in that including：
Terminal obtains grouping information by high-level signaling, and the grouping information includes the transmission group mark where the terminal；
Transmission group is enhanced described in physical downlink control channel PDCCH region detection according to transmission group mark in subframe
Physical Downlink Control Channel E-PDCCH addressing group configured information；
The E-PDCCH search spaces address that group's configured information determines the terminal is addressed according to the E-PDCCH；
Under detecting that the user of the terminal is proprietary in the E-PDCCH of the subframe according to E-PDCCH search spaces address
Row control information；
Wherein, detect that the E-PDCCH addressing group of the transmission group refers in the PDCCH region of subframe according to transmission group mark
Show that information includes:
The transmission group is identified to the E-PDCCH addressing that the transmission group is determined as the input of group's configured information hash function
Group's configured information is in the PDCCH region position of the subframe；
The E-PDCCH for detecting the transmission group according to the position addresses configured information.
2. according to the method described in claim 1, it is characterised in that also include：
Evolved base station eNB is according to the far and near by terminal of channel feedback information, the similarity of wireless propagation environment and geographical position
It is divided into different transmission groups；
The grouping information is sent to the terminal by the eNB by high-level signaling.
3. according to the method described in claim 1, it is characterised in that also include：
The terminal is detected in the PDCCH public search spaces of the subframe to the common control information of down channel.
4. according to the method described in claim 1, it is characterised in that the grouping information also includes：Terminal number in transmission group,
Terminal sequence number in transmission group.
5. according to the method described in claim 1, it is characterised in that the E-PDCCH addressing group configured information includes indicating
Whether position, transmitted with the proprietary Downlink Control Information of user for indicating each terminal in the transmission group in the subframe.
6. according to the method described in claim 1, it is characterised in that also include：
Evolved base station eNB is semi-statically configured by high-level signaling, switchs the E-PDCCH addressing group configured information；
When closing E-PDCCH addressing group's configured information, the E-PDCCH that the eNB passes through high-level signaling instruction terminal
Search space；
When opening E-PDCCH addressing group's configured information, the eNB addresses group by the E-PDCCH and indicates to believe
The dynamic E-PDCCH search spaces for indicating group endpoints of breath.
7. according to the method described in claim 1, it is characterised in that also include：
Downlink resource retains original PDCCH region, and the common control information of all terminals still distributes the common search in PDCCH
In space；
User's private downlink control information distribution of early version terminal is in PDCCH region transmission；The user of redaction terminal is special
Downlink Control Information is then distributed in E-PDCCH area transmissions.
8. a kind of Downlink Control Information acquisition device, it is characterised in that including：
Transmission group identifier acquisition module, for obtaining grouping information by high-level signaling, the grouping information is included where terminal
Transmission group mark；
Group's configured information detection module, for identifying the physical downlink control channel PDCCH in subframe according to the transmission group
The enhanced Physical Downlink Control Channel E-PDCCH addressing group configured information of transmission group described in region detection；
Search space address determination module, for addressing the E- that group's configured information determines the terminal according to the E-PDCCH
PDCCH search space address；
Proprietary control information detection module, for according to E-PDCCH search spaces address in the E-PDCCH of the subframe
Detect the proprietary Downlink Control Information of user of the terminal；
Wherein, group's configured information detection module is used to regard transmission group mark as the defeated of group's configured information hash function
Enter to determine that the E-PDCCH of the transmission group addresses group's configured information in the PDCCH region position of the subframe；And according to described
Detect the E-PDCCH addressing configured informations of the transmission group in position.
9. device according to claim 8, it is characterised in that also include：
Common control information detection module, the public control for the PDCCH public search spaces in the subframe to down channel
Information processed is detected.
10. device according to claim 8, it is characterised in that the E-PDCCH addressing group configured information includes indicating
Whether position, transmitted with the proprietary Downlink Control Information of user for indicating each terminal in the transmission group in the subframe.
11. device according to claim 8, it is characterised in that the grouping information also includes：Number of terminals in transmission group
Mesh, terminal sequence number in transmission group.
12. a kind of terminal, including the Downlink Control Information acquisition device in claim 8 to 11 described in any one.
13. a kind of Downlink Control Information obtains system, it is characterised in that including terminal as claimed in claim 12, Yi Jiyan
Enter type base station eNB；
Terminal is divided into not by the eNB according to the distance in channel feedback information, the similarity of wireless propagation environment and geographical position
Same transmission group；The grouping information is sent to by the terminal by high-level signaling.
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| CN201310170707.2A CN104144502B (en) | 2013-05-10 | 2013-05-10 | Physical down control information acquisition methods, device, terminal and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106549694A (en) | 2015-09-18 | 2017-03-29 | 电信科学技术研究院 | The method of reseptance of channel condition information, feedback method, device, base station and terminal |
| CN108352958B (en) * | 2015-11-04 | 2020-12-11 | 北京小米移动软件有限公司 | Method for receiving downlink signal by user equipment and user equipment |
| EP3331294B1 (en) * | 2015-11-13 | 2023-03-01 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method of allocating radio resource and device utilizing same |
| CN108271259B (en) * | 2016-12-30 | 2023-10-24 | 华为技术有限公司 | Resource indication method of control channel, user equipment and network equipment |
| CN108270535B (en) * | 2017-01-03 | 2022-09-27 | 中兴通讯股份有限公司 | Channel detection method and device |
| CN108282290B (en) * | 2017-01-06 | 2022-05-24 | 北京三星通信技术研究有限公司 | Method and equipment executed by terminal and base station in communication system |
| CN108633010A (en) * | 2017-03-21 | 2018-10-09 | 株式会社Ntt都科摩 | A kind of transmission method and device of Downlink Control Information |
| CN108633020B (en) | 2017-03-23 | 2021-06-15 | 华为技术有限公司 | Control information sending and receiving method and related equipment |
| CN108809493B (en) * | 2017-05-05 | 2022-06-24 | 中兴通讯股份有限公司 | Information sending and receiving method, device, equipment and storage medium |
| CN109039557B (en) * | 2017-06-12 | 2020-12-29 | 上海朗帛通信技术有限公司 | Method and device used in multi-antenna user equipment and base station |
| CN109219138B (en) * | 2017-07-06 | 2023-06-27 | 普天信息技术有限公司 | Transmission processing method, device, electronic equipment and storage medium |
| CN114040476B (en) * | 2017-10-27 | 2024-04-09 | 华为技术有限公司 | Method, equipment and system for transmitting downlink control information |
| CN110149643A (en) * | 2018-02-11 | 2019-08-20 | 索尼公司 | Device and method, computer readable storage medium in wireless communication system |
| CN110740008B (en) | 2018-07-18 | 2020-12-15 | 华为技术有限公司 | PDCCH sending and blind detection method and device |
| CN110839287B (en) * | 2018-08-17 | 2023-04-07 | ***通信有限公司研究院 | Indication method, user equipment and network side equipment |
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