CN102882644B - The check processing of Downlink Control Information, detection method and device - Google Patents
The check processing of Downlink Control Information, detection method and device Download PDFInfo
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- CN102882644B CN102882644B CN201210355167.0A CN201210355167A CN102882644B CN 102882644 B CN102882644 B CN 102882644B CN 201210355167 A CN201210355167 A CN 201210355167A CN 102882644 B CN102882644 B CN 102882644B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0075—Transmission of coding parameters to receiver
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Abstract
The invention provides a kind of check processing of Downlink Control Information, detection method and device, the check processing method of this Downlink Control Information comprises: be that each group configures a special exclusive search volume of group respectively for the cluster downlink multicast channel in broadband cluster communication system, wherein, the exclusive search volume of this group is identified by cluster wireless Network Temporary Identifier T-RNTI; In the exclusive search volume of group of configuration, distribute for physical downlink control channel PDCCH and specify the degree of polymerization, make colony terminal carry out blind Detecting according to the appointment degree of polymerization to the PDCCH in the exclusive search volume of group.Adopt technical scheme of the present invention, solve in correlation technique, there is no and the technological means that the PDCCH that covers detects is added to T-RNTI, thus Downlink Control Information when meeting that in group system, group service and general service coexist detects demand.
Description
Technical field
The present invention relates to the communications field, particularly a kind of check processing of Downlink Control Information, detection method and device.
Background technology
The private wireless communication system that trunked communication system (Trunking Communication System) is developed to meet industry user's command scheduling demand, apply towards specific industry, in system, a large amount of wireless user shares a small amount of wireless channel, being that main body is applied with command scheduling, is a kind of multipurpose, dynamical wireless communication system.Trunked communication system in a government office, public safety, emergency communication, electric power, civil aviaton, the field such as petrochemical industry and army have a wide range of applications market.
Trunked communication system experienced by the development course similar with cell mobile communication systems.Wherein, first generation group system is simulation trunked communication system, and main support voice communication, at present progressively by market.Second generation group system is narrow-band digital trunked communication system, is risen the nineties in 20th century, within about 2004, starts to dispose in China, is the most widely used trunked communication system of Present Domestic.Digital clustering communication system support voice communicates with low speed data (the highest 28.8kbps), representative system is ETSI (European Telecommunications Standards Institute, referred to as ETSI) TErrestrial TRunked Radio (the Terrestrial Trunked Radio that defines, referred to as TETRA) system, Integrated Digital Enhanced Network (the Integrated Digital Enhanced Networks of U.S. Motorola, referred to as iDEN) system, open trunking architecture (the GlobalOpen Trunking Architecture that ZTE Co., Ltd develops based on CDMA1X, referred to as GoTa) system and based on GSM exploitation GT800 system.
From the development of current cluster communication system, the development of trunked communication system lags far behind the development of public cellular system, and its aspect such as technological innovation and industrial chain is all also complete not to the utmost.In the tenability of data transmission capabilities and multimedia service, current digital narrowband trunked communication system is still relatively backward.Such as, iDEN system carries out improving the rear broadband integrated Dispatch Enhanced Network (Wide-iDEN, referred to as WiDEN) released to time slot and modulator approach, and hardware circuit solution is increased to 384kbps; TETRA enhanced data rates for GSM evolution (TETRA Release 2 Enhanced Data Service, referred to as TEDS), ideally can support the hardware circuit solution being no more than 700kbps; All do not reach the order of magnitude of Mbps.In addition, in the availability of frequency spectrum and covering, existing digital cluster system can not well satisfy the demands.
Along with the develop rapidly of mobile Internet and the Large scale construction in global radio city, the broadband development trend becoming whole radio communication.Accordingly; trunked communication system is technically also by the future development to system IPization, business variation, data broadband, terminal multimode; from concrete application point; be mainly reflected in high-speed data, video and be implemented in the multiple application on this basis, comprise the aspects such as mobile office, multimedia cluster scheduling, video monitoring, City Emergency Linkage Control System.
By International Standards Organization the 3rd generation partner program (3rd Generation Partnership Project, referred to as 3GPP) Long Term Evolution (the Long Term Evolution that works out, referred to as LTE) system become Next generation cellular communication mainstream standard, obtain the extensive support of operator and the manufacturer that communicates in global range, current industry has had comparatively ripe LTE system equipment and LTE terminal puts it into commercial operation, and progressively in global large scale deployment.LTE standard have employed OFDM (Orthogonal FrequencyDivision Multiplexing, referred to as OFDM), multiple-input, multiple-output (Multiple Input MultipleOutput, referred to as MIMO) etc. advanced Radio Transmission Technology, flat network topology result and all-IP systems framework, support the system bandwidth of maximum 20MHz, more than the downlink peak rates of 300Mbps and shorter transmission delay.
Consider the advantage of above-mentioned LTE standard and the requirement of broadband cluster communication system, industry very naturally proposes a kind of digital cluster system of the structure based on LTE technology.In this group system, group service will be carried in grouping (packet-switched, referred to as PS) territory, can be completely achieved sharing of Traffic Channel, will greatly improve resource utilization, thus reduce the operation cost of system.On the other hand, because LTE technology adopts the all-IP flattening network architecture, base station is directly connected with core net, and the network side interior signaling interaction therefore in call establishment reduces, and call set-up time is also shortened, and can meet the demand of group system.Based on LTE mature technology, depend on and quick transformation is carried out to the LTE system equipment of industry relative maturity and terminal industrial chain, be conducive to releasing broadband cluster communication system fast, meet the growing trunking communication market demand.For departments such as general enterprises, logistics, communications and transportation, in order to reduce costs, embody economic benefit, the general common set group communication system often adopting shared frequency resource and network infrastructure, adopts and provides the mode of group service to realize command scheduling function in public mobile communication system.On the other hand, along with the day of frequency resource is becoming tight, how to improve frequency efficiency, realize the best configuration of resource, strengthen that reply is urgent, the fast reaction of accident and the ability to ward off risks become top priority.In this case, Digital Clustering and public cellular net common network will become the developing direction of future digital trunking communication.This means, broadband cluster communication system, also must the common point-to-point service of compatible original LTE except supporting except group service.
In LTE standard, such as eMBMS(enhancement mode broadcast/group broadcast multimedia technology) point-to-multipoint transmission technology, wait until in the specification of 3GPP Release 9 version and just give complete definition, current industry supports that the mature system equipment of eMBMS is also relative less with terminal.Therefore, in the LTE technology that present stage is considered, should still based on point to point link.But cluster downlink business is a kind of business of multicast (multicast) type of point-to-multipoint, therefore need, on the basis of the original channel of LTE, to increase new logic channel, see Fig. 1.
Newly-increased logic channel includes:
Clustered paging channel (Trunking Paging Channel, TPCH): set up group service transmission fast for paging cluster user;
Cluster Dedicated Control Channel (Trunking Dedicated Control Channel, TDCCH): for carrying the clustered control signaling for descending right of speech user or individual calling user;
Cluster Common Control Channel (Trunking Global Control Channel, TGCCH): for carrying the control signal for the descending group service listening user in certain group;
Cluster Common transport channel (Trunking Global Traffic Channel, TGTCH): for carrying the descending group service for listening user in certain group.
In LTE standard, downlink business is generally mapped to the upper transmission of Physical Downlink Shared Channel (PhysicalDownlink Shared Channel, referred to as PDSCH).The time span of PDSCH channel is the subframe (subframe) that length equals 1ms, also referred to as a Transmission Time Interval (Transmission Time Interval, referred to as TTI).In each subframe, that corresponding with PDSCH is a physical control channel (Physical Downlink Control Channel, referred to as PDCCH).Similar, all uplink services are also mapped to the upper transmission of Physical Uplink Shared Channel (Physical Uplink SharedChannel, referred to as PUSCH), and corresponding with PUSCH generally also has a PDCCH.PDCCH carries Downlink Control Information (Downlink Control Information, referred to as DCI), and these DCI have different-format (format), different control information content that difference is corresponding, such as:
DCI format 0: can be used for the information such as instruction PUSCH resource, also referred to as " uplink authorization " (uplinkgrant);
DCI format 1A: can be used for the information such as instruction PDSCH resource, also referred to as " descending distribution " (downlink assignment).
According to down channel situation (terminal distance base station distance, face from adjacent area interference size etc.); protect to provide the chnnel coding of response; guarantee PDCCH channel end side can be very high probability successfully detect; DCI can adopt different chnnel coding code checks, is finally mapped in the resource of different size.In LTE system, define 4 kinds of PDCCH resource sizes altogether, be respectively 1,2,4 and 8 control channel elements (Control Channel Element, referred to as CCE), wherein each CCE contain 72 coding after bit information.CCE number shared by PDCCH, also referred to as the degree of polymerization (aggregation level).The degree of polymerization is higher, means that provided coding protection is stronger, but simultaneously shared by resource also more.
LTE uplink and downlink all adopt dynamic assignment (dynamic scheduling) or semi-continuous distribution (semi-persistent scheduling, referred to as SPS) mode, provide very high flexibility ratio.Accordingly, with the PDCCH control channel corresponding to PDSCH and PUSCH, also carry out distributing in certain public " control area " (control region).This control area is generally made up of 1 ~ 4 OFDM symbol before each subframe starts.Owing to there is different logic channels and transmission channel kinds in system, as system message, paging, accidental access response, user's dedicated uplink and downlink business and uplink power control commands etc., in order to distinguish, for each PDSCH and PUSCH defines the Radio Network Temporary Identifier (Radio Network Temporary Identifier, referred to as RNTI) of 16 bit lengths that is associated.
In a subframe, may there is multiple PDCCH needs to send simultaneously, and LTE system is in order to reduce control channel expense, and the position of these PDCCH channels residing for above-mentioned control area is dynamic assignment.Like this, terminal, in order to receive DCI, must first be searched in this control area.In LTE system, in this public domain, the process complexity of PDCCH is searched in order to reduce terminal, thus reach the object reducing process time delay and/or reduce power consumption, respectively define in control area two " PDCCH search space ", i.e. public search space (common search space) and the exclusive search volume of UE (UE-specificsearch space).Correspondence often plants DCI type, terminal only needs to search in the search volume of correspondence, that is: in control area, correspondence is each allows the original position occurring PDCCH, attempt carrying out processing (comprising: the links such as deinterleaving, rate de-matching, channel decoding) by the corresponding degree of polymerization successively, and utilize aforementioned RNTI value to remove to cover (de-masking), if CRC check is correct to CRC part, then detect a PDCCH, and comprised DCI information is resolved.Said process, also referred to as PDCCH blind Detecting (PDCCH blind detection) process.Note, public search space only takies the space of maximum 16 CCE, is generally used for the PDCCH carried for for users all in community or non-user-specific and transmits, such as system broadcast message and beep-page message etc.; But, for the purpose of raising flexibility and raising spectrum efficiency, if public search space has vacant, so also some PDCCH for specific user can be arranged in this public search space.Therefore, even if add the user special information covered for C-RNTI, except searching in the exclusive search volume of UE, also need in public search space, carry out corresponding PDCCH detection.
According to the definition of LTE standard, for various DCI format in each subframe, terminal needs at most to carry out totally 44 secondary channel decodings (Viterbi decoding).
In control area, public search space equals 0 from CCE offset address; And the exclusive search volume of UE, the CCE offset address of corresponding each degree of polymerization is then generated by a hash function (Hashing function), and changes by subframe.The initial value of this hash function equals terminal and sets up the C-RNTI distributed when RRC connects.Corresponding each terminal, because C-RNTI is its unique identification in a network, therefore can ensure that the exclusive search volume of UE defined for each terminal is different in each subframe.An example is see Fig. 2.Can guarantee like this to occur between the exclusive search volume of the UE of different terminals that the probability conflicted is low as far as possible, thus can guarantee that the availability of frequency spectrum that control channel transmits is higher, also providing network time logical is the flexibility ratio that different terminals carries out when PDCCH distributes.
Aforementioned four newly-increased clustering logic channels are all mapped to DL-SCH transmission channel, then are mapped on PDSCH physical channel in air interface transmission.For these four newly-increased clustering logic channels, the RNTI of existing or new definition is adopted to distinguish respectively according to its characteristic.Wherein:
TPCH channel: the mechanism that original paging channel (Paging Channel, referred to as PCH) is relevant with LTE is in essence similar, the clustered paging RNTI(TP-RNTI by a newly definition) add the PDCCH covered and carry out the instruction of PDSCH resource; By each terminal being needed reception General Page and the actual of clustered paging to stagger, terminal just can be avoided to need to go detection P-RNTI and TP-RNTI to add the possibility of the PDCCH covered in same subframe simultaneously;
TDCCH channel: in essence or point-to-point transmission, the PDCCH therefore still adopting original C-RNTI or SPSC-RNTI of LTE to cover carries out PDSCH resource, and wherein C-RNTI is that user to set up when RRC connects network allocation to a mark of this user;
TGCCH and TGTCH channel: be point-to-multipoint transmission in essence, the cluster RNTI(T-RNTI newly defined by one group) add the PDCCH covered and carry out the instruction of PDSCH resource, wherein, network reserved a collection of (such as: 4096) RNTI value in RNTI space is used as T-RNTI, and be each newly-built group allocation T-RNTI, in this group, all users of listening adopt this T-RNTI to receive to carry out corresponding descending cluster multicast business.
For the purpose of describing simply, here TGCCH and TGTCH is referred to as " cluster downlink multicast channel ".In some other document, likely different titles is adopted to these cluster down channels, but the essence of their point-to-multipoint transmission is identical.
In this patent, group (trunking group): as the term suggests trunking communication multigroup user is integrated into instrument communicate.The maximum feature of trunking communication is that Speech Communication adopts PTT((Push ToTalk), the mode pushed to talk with one continues, calledly can to answer without the need to off-hook, and the speed that continues, and can the functions such as group call be supported, its function mode, based on single work, half-duplex, mainly adopts the dynamics of channels method of salary distribution, and user has different priority levels and specific function, can get ready to go into action in hundreds during communication.
In order to enable colony terminal while reception cluster downlink multicast channel, the carrying out maintaining original LTE general service can also be continued, wish that terminal is on existing PDCCH blind Detecting process base, then increase the detection adding the PDCCH covered for above-mentioned T-RNTI.How to carry out search volume definition for T-RNTI adds the PDCCH covered, and the terminal searching method that definition is relevant, be one of key issue of the group system needs solution based on LTE.And, in order to while network enabled in multiple group, multiple T-RNTI may be there is simultaneously, the PDCCH capacity only relying on public search space to provide (only can be held 2 degree of polymerization and equal 8, or 4 degree of polymerization PDCCH channel of equaling 4) be far from being enough, for the problems referred to above of correlation technique, at present effective solution is not yet proposed.
Summary of the invention
The invention provides a kind of check processing of Downlink Control Information, detection method and device, for solving in correlation technique, there is no and the technological means that the PDCCH that covers detects is added to T-RNTI, and when there is multiple T-RNTI, the technical problems such as the PDCCH capacity that existing public search space provides is not enough.
For achieving the above object, according to a first aspect of the invention, a kind of check processing method of Downlink Control Information is provided, and adopts following technical scheme:
The check processing method of Downlink Control Information, for network side entity, comprise: be that each group configures a special exclusive search volume of group respectively for the cluster downlink multicast channel in broadband cluster communication system, wherein, the exclusive search volume of this group is identified by cluster wireless Network Temporary Identifier T-RNTI; In the exclusive search volume of described group of configuration, distribute for physical downlink control channel PDCCH and specify the degree of polymerization, make colony terminal carry out blind Detecting according to the described appointment degree of polymerization to the PDCCH in the exclusive search volume of described group.
Further, distribute for physical downlink control channel PDCCH and specify the degree of polymerization, comprise: the physical downlink control channel PDCCH covered is added to each described T-RNTI and distributes a described appointment degree of polymerization, wherein, the described appointment degree of polymerization and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and semi-continuous distribution cell-radio network identify SPSC-RNTI and add the PDCCH degree of polymerization covered without common factor.
Further, add after the physical downlink control channel PDCCH covered distributes a described appointment degree of polymerization to each described T-RNTI, also comprise: receive at the described colony terminal of needs in the subframe of cluster downlink multicast channel, the PDCCH degree of polymerization selecting C-RNTI and SPSC-RNTI to add from the degree of polymerization outside the described appointment degree of polymerization to cover.
Further, the exclusive search volume of described group configures in the following manner: in the exclusive search volume of UE, divides specified search range as the exclusive search volume of described group.
Further, add to T-RNTI the physical downlink control channel PDCCH covered to each described T-RNTI to distribute one and specify after the degree of polymerization, also comprise: issue the described appointment degree of polymerization by the appointment signaling in system broadcast message or cluster downlink connection establishment process to colony terminal.
Further, the check processing method of Downlink Control Information also comprises: issue indication information to described colony terminal, and wherein, this indication information is used to indicate the subframe needing to receive cluster downlink multicast channel.
According to a second aspect of the invention, provide a kind of detection method of Downlink Control Information, and adopt following technical scheme:
The detection method of Downlink Control Information, for colony terminal, comprise: receive the appointment degree of polymerization coming from network side entity, wherein, this appointment degree of polymerization be network side entity for the cluster downlink multicast channel in broadband cluster communication system, configuration the exclusive search volume of group in, be physical downlink control channel PDCCH distribute the appointment degree of polymerization, further, the exclusive search volume of described group is identified by cluster wireless Network Temporary Identifier T-RNTI; According to the described appointment degree of polymerization, blind Detecting is carried out to the PDCCH in the exclusive search volume of described group.
Further, the described appointment degree of polymerization is described network side entity adds the physical downlink control channel PDCCH distribution the covered degree of polymerization to each described T-RNTI, further, the described appointment degree of polymerization and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and SPSC-RNTI add the PDCCH degree of polymerization covered without common factor.
According to a third aspect of the present invention, a kind of check processing device of Downlink Control Information is provided, and adopts following technical scheme:
The check processing device of Downlink Control Information, be arranged in network side entity, comprise: configuration module, for for the cluster downlink multicast channel in broadband cluster communication system, for each group configures a special exclusive search volume of group respectively, wherein, the exclusive search volume of this group is identified by cluster wireless Network Temporary Identifier T-RNTI; Distribution module, in the exclusive search volume of described group of configuration, distribute for physical downlink control channel PDCCH and specify the degree of polymerization, wherein, colony terminal carries out blind Detecting according to the described appointment degree of polymerization to the PDCCH in the exclusive search volume of described group.
According to a fourth aspect of the present invention, provide a kind of checkout gear of Downlink Control Information, and adopt following technical scheme:
The checkout gear of Downlink Control Information, be arranged in colony terminal, comprise: receiver module, for receiving the appointment degree of polymerization coming from network side entity, wherein, this appointment degree of polymerization is that network side entity is for the cluster downlink multicast channel in broadband cluster communication system, in the exclusive search volume of group of configuration, for the degree of polymerization that physical downlink control channel PDCCH is distributed, and the exclusive search volume of described group is identified by cluster wireless Network Temporary Identifier T-RNTI; Detection module, for carrying out blind Detecting according to the described appointment degree of polymerization to the PDCCH in the exclusive search volume of described group.
Pass through the present invention, be adopted as the technological means that each group all configures a special exclusive search volume of group, solve in correlation technique, there is no and the technological means that the PDCCH that covers detects is added to T-RNTI, and when there is multiple T-RNTI at the same time, the technical problems such as PDCCH capacity that existing public search space provides is not enough, thus Downlink Control Information when meeting that in group system, group service and general service coexist detects demand.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 be according to the cluster of correlation technique increase newly logic channel and and the schematic diagram of mapping relations between transmission channel and physical channel;
Fig. 2 is an example according to the PDCCH public search space defined in the LTE system of correlation technique and the exclusive search volume of UE;
Fig. 3 is the flow chart of the check processing method of Downlink Control Information according to the embodiment of the present invention 1;
Fig. 4 is the structured flowchart of the check processing device of Downlink Control Information according to the embodiment of the present invention 1;
Fig. 5 is the flow chart of the detection method of Downlink Control Information according to the embodiment of the present invention 2;
Fig. 6 is the structured flowchart of the checkout gear of Downlink Control Information according to the embodiment of the present invention 2;
Fig. 7 is an example schematic diagram of PDCCH public search space according to the embodiment of the present invention 3, the exclusive search volume in the exclusive search volume of UE and group;
Fig. 8 is the FB(flow block) of simultaneously carrying out PDCCH detection according to the terminal of the embodiment of the present invention 3 in the exclusive search volume in the exclusive search volume of UE and group.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Consider in correlation technique, when there is multiple T-RNTI at the same time, the technical problems such as the PDCCH capacity that existing public search space provides is not enough, provide relevant solution below in conjunction with embodiment, existing detailed description.
Fig. 3 is the flow chart of the check processing method of Downlink Control Information according to the embodiment of the present invention 1.The method application is used for network side entity, and shown in Figure 3, the method comprises following treatment step:
Step S302, for the cluster downlink multicast channel in broadband cluster communication system, for each group configures a special exclusive search volume of group respectively, wherein, the exclusive search volume of this group is identified by T-RNTI;
Step S304, in the exclusive search volume of group of configuration, specifies the degree of polymerization for PDCCH distributes, and makes colony terminal carry out blind Detecting according to the appointment degree of polymerization to the PDCCH in the exclusive search volume of group.
By above-mentioned treatment step, no matter for the situation that there is one or more T-RNTI, above-mentioned treatment step all can be utilized to carry out blind Detecting to PDCCH, especially for the situation that there is multiple T-RNTI, can solve in the case, the technical problem of the PDCCH capacity deficiency that existing public search space provides, thus Downlink Control Information when meeting that in group system, general service and group service coexist detects demand.
Adopt the processing procedure in step S302 and step S304, owing to having increased a set of exclusive search volume newly, but, based on LTE prior art, often only considered during Terminal Design and support public search space and the exclusive search volume of UE, maximum 44 the Viterbi decoding process of corresponding support.If terminal is in order to support group system, and needing to increase a set of exclusive search volume newly, adding the processing load of terminal PDCCH blind Detecting undoubtedly, causing the rising of complexity and/or the increase of power consumption.And if need to increase the PDCCH blind Detecting processing time, may mean that the more buffer memory of needs is to store the reception data of each subframe, because before completing the DCI information analysis on PDCCH, the method for there is no starts to carry out PDSCH decoding process.Further, the time leaving PUSCH transmission processing for can also be reduced.Therefore very tremendous influence may also be produced by the soft and hardware timing Design of terminal.If too large on the impact of terminal modifications, then available terminal kinds can be caused very few, the successful commercialization of group system is had a negative impact.
In a word, for the cluster downlink multicast channel of this newly-increased point-to-multipoint form in cluster, need the T-RNTI in the exclusive space of terminal support group to add the PDCCH covered on the one hand to detect, the rising of the terminal PDCCH blind Detecting complexity brought thus and required change amount of carrying out must be considered again on the other hand.In order to release rapidly the terminal supported based on the broadband cluster communication system of LTE, above-mentioned contradiction must be solved, take into account demand and the situation such as terminal processing capacity and maturity of cluster.For solving above-mentioned contradiction, in the present embodiment, network side entity adds to each T-RNTI the physical downlink control channel PDCCH covered and distributes an appointment degree of polymerization, wherein, specify the degree of polymerization and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and semi-continuous distribution cell-radio network to identify SPSC-RNTI and add the PDCCH degree of polymerization covered without common factor.
Existing LTE related specifications regulation, terminal is searched for the PDCCH that the degree of polymerization in the exclusive search volume of UE is respectively 1,2,4,8 respectively at each subframe needs.Now in order to support cluster application, for example network is that to add the degree of polymerization that the PDCCH that covers specifies be 4 to T-RNTI, when so terminal carries out PDCCH search in the exclusive search volume of original UE, just avoid the PDCCH that the degree of polymerization is 4, and only search for the PDCCH that the degree of polymerization is respectively 1,2,8; Then, terminal in this subframe vacant for the degree of polymerization be 4 PDCCH searching resource, add for carrying out T-RNTI the PDCCH search covered.Like this, the PDCCH search complexity that terminal is total does not rise.This mode, terminal only needs to change when dispense needles searches for hardware resource to the PDCCH of different polymerization degree, comparatively simply.
Correspondingly, network side entity each T-RNTI added T-RNTI the physical downlink control channel PDCCH covered distribute one specify the degree of polymerization after, colony terminal is being needed to receive in the subframe of cluster downlink multicast channel, the PDCCH degree of polymerization selecting C-RNTI and SPSC-RNTI to add from the degree of polymerization of specifying outside the degree of polymerization to cover.
In the present embodiment, the exclusive search volume of group configures in the following manner: in the exclusive search volume of UE, divides specified search range as the exclusive search volume of group.Following processing procedure can be shown as:
In the exclusive search volume of former UE, for the part of " DCI format 1 or 1B or 1D or 2 or 2A or 2B ", can mark special in the PDCCH search in the exclusive search volume of group, so still can accomplish the number of times not increasing Viterbi decoding in terminal PDCCH blind detection process.
In the present embodiment, network side entity adds to T-RNTI the physical downlink control channel PDCCH covered to each T-RNTI and distributes one and specify after the degree of polymerization, and network side entity also needs to issue the appointment degree of polymerization by the appointment signaling in system broadcast message or cluster downlink connection establishment process to colony terminal.
In the present embodiment, network side entity can also issue indication information to colony terminal, and wherein, this indication information is used to indicate the subframe needing to receive cluster downlink multicast channel.
In the present embodiment, additionally provide a kind of check processing device of Downlink Control Information, be arranged in network side entity, for realizing said method, as shown in Figure 4, this device comprises:
Configuration module 40, be connected to distribution module 42, for for the cluster downlink multicast channel in broadband cluster communication system, for each group configures a special exclusive search volume of group respectively, wherein, the exclusive search volume of this group is identified by cluster wireless Network Temporary Identifier T-RNTI;
Distribution module 42, in the exclusive search volume of group of configuration, distributes for physical downlink control channel PDCCH and specifies the degree of polymerization, and wherein, colony terminal carries out blind Detecting according to the appointment degree of polymerization to the PDCCH in the exclusive search volume of group.
Embodiment 2
The present embodiment is the processing scheme corresponding with embodiment 1, is mainly described in end side.Method in the present embodiment is applied in colony terminal, and particularly, Fig. 5 is the flow chart of the detection method of Downlink Control Information according to the embodiment of the present invention 2, and as shown in Figure 5, the method comprises:
Step S502, receive the appointment degree of polymerization coming from network side entity, wherein, this appointment degree of polymerization is that network side entity is for the cluster downlink multicast channel in broadband cluster communication system, in the exclusive search volume of group of configuration, for the appointment degree of polymerization that PDCCH distributes, and the exclusive search volume of group is identified by cluster wireless Network Temporary Identifier T-RNTI;
Step S504, carries out blind Detecting according to the appointment degree of polymerization to the PDCCH in the exclusive search volume of group.
Identical with in embodiment 1, in the present embodiment, the above-mentioned appointment degree of polymerization is network side entity adds the physical downlink control channel PDCCH distribution covered to the T-RNTI degree of polymerization to each T-RNTI, further, the PDCCH degree of polymerization of specifying the degree of polymerization and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and SPS C-RNTI to add to cover is without common factor.
In the present embodiment, additionally provide a kind of checkout gear of Downlink Control Information, be arranged in colony terminal, for realizing said method, as shown in Figure 6, this device comprises:
Receiver module 60, be connected to detection module 62, for receiving the appointment degree of polymerization coming from network side entity, wherein, this appointment degree of polymerization be network side entity for the cluster downlink multicast channel in broadband cluster communication system, configuration the exclusive search volume of group in, be physical downlink control channel PDCCH distribute the degree of polymerization, further, the degree of polymerization is specified to be identified by cluster wireless Network Temporary Identifier T-RNTI;
Detection module 62, for carrying out blind Detecting according to the appointment degree of polymerization to the PDCCH in the exclusive search volume of group.
In order to understand above-described embodiment better, describe in detail below in conjunction with embodiment 3 and embodiment 4
Embodiment 3
The present embodiment provides a kind of method of carrying out Downlink Control Information detection in based on the broadband cluster communication system of LTE, under the prerequisite of PDCCH check processing ability need not increasing existing terminal, be used in same subframe the detection of the Downlink Control Information (as: descending colony dispatching information) in the exclusive search volume of Downlink Control Information (as: uplink authorization) and group of simultaneously carrying out in the exclusive search volume of UE, thus Downlink Control Information testing requirement when can meet that in group system, general service and group service coexist.
For achieving the above object, the technical scheme that the present embodiment adopts is as follows:
Group system is each cluster group definition exclusive search volume of group, and this search volume generates based on T-RNTI.Wherein, T-RNTI is a community unique identification of this group, distributes when cluster downlink connection establishment, and in this group, all users of listening utilize T-RNTI to carry out the reception of cluster downlink multicast channel.
Group system is that T-RNTI adds the PDCCH covered and distributes a fixing PDCCH CCE degree of polymerization, this fixing PDCCE CCE polymeric area can be chosen for 4 or 8, and indicates this value by system broadcast message or by related signaling in cluster downlink connection establishment process to colony terminal.
Group system also by system broadcast message or by related signaling in cluster downlink connection establishment process, indicates those subframes to need to receive descending cluster multicast channel to terminal.
For each group, system is adopted with the following method when the DCI planning carrying out each subframe distributes and determines the PDCCH degree of polymerization:
Receiving in those subframes of cluster downlink multicast channel without the need to terminal, the correlation technique process C-RNTI/SPS C-RNTI still continuing to use existing LTE network adds the PDCCH covered, without the need to making change;
Receive in those subframes of cluster downlink multicast channel needing terminal, when determining that C-RNTI/SPSC-RNTI adds the PDCCH degree of polymerization covered, need to avoid aforementionedly to add that fixing degree of polymerization that the PDCCH that covers adopts for T-RNTI, and select in remaining degree of polymerization set.
Corresponding, terminal carries out PDCCH blind Detecting as follows in each subframe:
If cluster cluster downlink connects when not yet setting up or in those subframes without the need to receiving cluster downlink multicast channel, still continue to use the process of existing PDCCH blind checking method, include: in public search space and the exclusive search volume of UE that defined by C-RNTI, carry out the search that C-RNTI/SPS C-RNTI adds the PDCCH covered;
Needing to receive in those subframes of cluster downlink multicast channel, in public search space and the exclusive search volume based on T-RNTI definition, carry out T-RNTI add the PDCCH detection covered, when detecting in the exclusive search volume of group, only adopt the aforementioned fixing cluster PDCCH CCE degree of polymerization to search for simultaneously;
Needing to receive in those subframes of cluster downlink multicast channel, in public search space and the exclusive search volume of UE based on C-RNTI definition, carry out C-RNTI/SPS C-RNTI add the PDCCH detection covered, avoid the aforementioned fixing cluster PDCCH CCE degree of polymerization when detecting in the exclusive search volume of UE simultaneously and search for.
It can be seen from the above, and in the present embodiment, for cluster downlink multicast channel, newly increased one " the exclusive search volume of group ", this search volume defined by corresponding group T-RNTI; In the exclusive search volume of this group, add by T-RNTI the PDCCH covered and adopt certain fixing CCE degree of polymerization, such as 4 or 8, and be indicated to terminal by system message or signaling; Receive in the subframe of cluster downlink multicast channel needing terminal, group system is in the exclusive search volume of the UE defined by C-RNTI, carry out C-RNTI/SPS C-RNTI when adding the Resourse Distribute of the PDCCH covered, need to avoid above-mentioned T-RNTI and add the fixation of C CE degree of polymerization that the PDCCH that covers adopts, and select in remaining degree of polymerization set; Terminal is needing to receive in the subframe of cluster downlink multicast channel, C-RNTI/SPS C-RNTI can be carried out in exclusive space add the PDCCH that covers detect at the UE defined by C-RNTI, and in the exclusive search volume of the group defined by T-RNTI, carry out T-RNTI simultaneously add the PDCCH covered and detect;
For terminal realizes, because the CCE degree of polymerization of the PDCCH in two exclusive search volumes is not occured simultaneously, therefore in fact do not increase the complexity that terminal carries out PDCCH blind Detecting, this is a key point.On the other hand, although give constraint to the degree of polymerization of original part PDCCH, but influence surface is very little (only has impact to cluster group user, and only in the subframe that those need reception cluster downlink multicast channel, have impact), and system equipment can adopt some other means (such as: avoid distributing this CCE degree of polymerization in these subframes, if can delay other subframe scheduling or space, control area enough raisings CCE degree of polymerization) to be down to minimum by this impact.Therefore, should in this way, very little in order to support cluster to need to do the impact of transforming on current LTE terminal, system equipment.
In the present embodiment, two of above-described embodiment kinds of replacement schemes are also provided to be,
The first replacement scheme, increase group's dedicated search space by force, also not adding to original C-RNTI/SPS C-RNTI the CCE degree of polymerization covering PDCCH does any restriction simultaneously, but must mean that this terminal carries out the rising of PDCCH blind Detecting complexity, against original intention of the present invention like this.
The second replacement scheme, in the exclusive search volume of former UE, for the part of " DCI format 1or 1B or1D or 2or 2A or 2B ", can mark special in the PDCCH search in the exclusive search volume of cluster, so still can accomplish the number of times not increasing Viterbi decoding in terminal PDCCH blind detection process.But do like this and undoubtedly the flexibility ratio that realizes of existing LTE terminal is had higher requirement, must consider whether existing terminal can be supported.
Embodiment 4
The present embodiment provides a kind of broadband cluster digital communication system built based on existing LTE system, and when the RNTI that definitions set faciation closes, specially for T-RNTI marks off a scope, certain segment length being such as positioned at 0001 ~ FFF3 is a segment limit of 4096.Wherein, T-RNTI is a community unique identification of each group, distributes when cluster downlink connection establishment, and in this group, all users of listening utilize T-RNTI to carry out the reception of cluster downlink multicast channel.
In the present embodiment, group system is each cluster group definition exclusive search volume of group, and this search volume generates based on T-RNTI.Such as: can use for reference in existing LTE specification and utilize hash function to generate the mode of exclusive search volume, degree of polymerization L(L is in the search volume of set { in 1,2,4,8} value)
based on parameter Y
ky is got when calculating
-1equal T-RNTI:
Wherein, Y
kimplication be: the initial CCE offset address in PDCCH search space.Following table k represents subframe sequence number (0<=k<=9), and subscript-1 represents initialization value here.
Y
k=(A*Y
k-1)mod D
Wherein, the implication of D is total CCE number that PDCCH search space comprises.
Wherein, mod is modulo operation, and A=39827, D=6557, k are subframe numbers (0 ~ 9).Then, the PDCCH Candidate Set of corresponding degree of polymerization L is defined as:
L*{(Y
k+m)mod floor(N
CCE,K/L)}+i
Wherein, m is the index of the PDCCH candidate for some degree of polymerization L.I represents in each PDCCH candidate, the index of CCE.The calculating of floor representative " rounding downwards ".
Wherein, N
cCE, krepresent the CCE number that in a kth subframe, control area comprises, i=0 ..., L – 1 to represent in a PDCCH contain the sequence number of L CCE, m=0 ..., M
(L)– 1 M here
(L)it is the PDCCH candidate number of the degree of polymerization L that LTE specification defines.
Group system is that T-RNTI adds the PDCCH covered and distributes a fixing PDCCH CCE degree of polymerization.Consider that needing to cover the group user being positioned at cell edge receives, this fixing PDCCE CCE polymeric area can be chosen for 4 or 8, and indicates this value by system broadcast message or by related signaling in cluster downlink connection establishment process to colony terminal.
As shown in Figure 7, the Y calculated according to T-RNTI in a kth subframe is supposed
k=38, and the control area in a kth subframe is altogether containing N
cCE, k=42 CCE.Meanwhile, system fixes the CCE degree of polymerization L=4 that T-RNTI adds the PDCCH covered.So calculate according to above formula, corresponding M can be obtained
(4)the CCE start offset address of=2 candidate PDCCH in control area equals respectively:
The PDCCH position candidate that m=0 is corresponding is initial: 4*{ (36+0) mod floor (42/4) }=24
The PDCCH position candidate that m=1 is corresponding is initial: 4*{ (36+1) mod floor (42/4) }=28
On the other hand, group system also by system broadcast message or by related signaling in cluster downlink connection establishment process, indicates those subframes to need to receive descending cluster multicast channel to terminal.Such as: according to system dispatching cycle, definable bitmap (bitmap), whether each bit in bitmap represents corresponding subframe can carry cluster downlink multicast channel, and the length of bitmap is exactly the dispatching cycle of network.After colony terminal receives this bitmap, just can know and need in which subframe to go to receive cluster downlink multicast channel.And for the terminal that those are not supported the terminal of cluster or also do not set up cluster downlink multicast business, then can ignore these instructions, still carry out common LTE business by original mode.
Those subframes receiving cluster downlink multicast channel are needed at colony terminal, if system also will be added for this colony terminal distributes other in same subframe in the exclusive search volume of UE the PDCCH covered by C-RNTI or SPS C-RNTI, such as uplink authorization, so when determining the CCE degree of polymerization of PDCCH, need to avoid above-mentionedly to add the fixation of C CE degree of polymerization that the PDCCH that covers distributes for T-RNTI.
Continue see Fig. 7, suppose the Y calculated according to C-RNTI in a kth subframe
k=9.Meanwhile, because system chooses the CCE degree of polymerization L=4 that T-RNTI adds the PDCCH covered, therefore add the PDCCH covered for C-RNTI or SPS C-RNTI, the selected CCE degree of polymerization needs to avoid L=4, and namely L can only select { 1,2,8}.So according to the original formulae discovery of LTE specification, the CCE start offset address of corresponding candidate PDCCH in control area can be obtained as follows:
L=1(contains M altogether
(1)=6 PDCCH candidates):
The PDCCH position candidate that m=0 is corresponding is initial: 1*{ (9+0) mod floor (42/1) }=9
The PDCCH position candidate that m=1 is corresponding is initial: 1*{ (9+1) mod floor (42/1) }=10
The PDCCH position candidate that m=2 is corresponding is initial: 1*{ (9+2) mod floor (42/1) }=11
The PDCCH position candidate that m=3 is corresponding is initial: 1*{ (9+3) mod floor (42/1) }=12
The PDCCH position candidate that m=4 is corresponding is initial: 1*{ (9+4) mod floor (42/1) }=13
The PDCCH position candidate that m=5 is corresponding is initial: 1*{ (9+5) mod floor (42/1) }=14
L=2(contains M altogether
(2)=6 PDCCH candidates):
The PDCCH position candidate that m=0 is corresponding is initial: 2*{ (9+0) mod floor (42/2) }=18
The PDCCH position candidate that m=1 is corresponding is initial: 2*{ (9+1) mod floor (42/2) }=20
The PDCCH position candidate that m=2 is corresponding is initial: 2*{ (9+2) mod floor (42/2) }=22
The PDCCH position candidate that m=3 is corresponding is initial: 2*{ (9+3) mod floor (42/2) }=24
The PDCCH position candidate that m=4 is corresponding is initial: 2*{ (9+4) mod floor (42/2) }=26
The PDCCH position candidate that m=5 is corresponding is initial: 2*{ (9+5) mod floor (42/2) }=28
L=8(contains M altogether
(8)=2 PDCCH candidates):
The PDCCH position candidate that m=0 is corresponding is initial: 8*{ (9+0) mod floor (42/8) }=32
The PDCCH position candidate that m=1 is corresponding is initial: 8*{ (9+1) mod floor (42/8) }=0
It should be noted that, for non-clustered terminal or for colony terminal without the need to receiving in those subframes of cluster downlink multicast channel, system still can be pressed { 1 in the exclusive search volume of UE by the mode that LTE is original, 2,4, by existing criterion in 8} set, choose C-RNTI or SPS C-RNTI and add the PDCCHCCE degree of polymerization covered.Therefore, the PDCCH flow process that is associated on original LTE general service of said method is without any impact.
On the other hand, even if need at colony terminal to receive in those subframes of cluster downlink multicast channel, in the exclusive search volume of corresponding UE, run into the restriction that certain CCE degree of polymerization above-mentioned can not be selected, system still has some means to be solved.Illustrate, suppose that the CCE degree of polymerization 4 has been left T-RNTI for and added the PDCCH covered and employ, but system is according to the estimation of this user equipment downlink PDCCH reception quality, find that choosing the CCE degree of polymerization for this terminal PDCCH equals 4 also proper, so just may produce conflict, now have two kinds of countermeasures:
Method A: if control area remaining space is enough, just equals 8 for C-RNTI or SPSC-RNTI adds the PDCCH selective polymerization degree covered in this subframe;
Method B: if the uplink service throughput of this terminal is less demanding, such as voice or in, low speed upstream data transmission, so can select at this colony terminal without the need to receiving in those subframes of cluster downlink multicast channel, carry out C-RNTI or SPS C-RNTI and add the PDCCH scheduling covered, now the CCE degree of polymerization is selected no longer restricted.
Visible by embodiment above, adopt method provided by the present invention, the definition of the exclusive search volume of group can be supported, select the impact of realization also smaller on system equipment original DCI programming dispatching and the PDCCH CCE degree of polymerization simultaneously, be conducive to carrying out quick transformation to support cluster communication function to existing LTE system equipment.
The execution mode of end side:
Corresponding with system side execution mode, terminal carries out PDCCH blind Detecting as follows in each subframe.
Particularly, the related signaling of terminal by read apparatus message or when receiving group's connection establishment, knows the fixing CCE degree of polymerization value that the PDCCH that system is covered for T-RNTI adds distributes, such as 4 or 8.Then, terminal also needs read apparatus message, or related signaling during reception group's connection establishment, and the system that obtains may dispatch the information of the subframe of cluster downlink multicast channel, such as a bitmap.
When the connection of cluster cluster downlink is not yet set up or in those subframes without the need to receiving cluster downlink multicast channel, still continue to use the process of existing PDCCH blind checking method, include: in public search space and the exclusive search volume of UE that defined by C-RNTI, carry out the search that C-RNTI or SPS C-RNTI adds the PDCCH covered.
Need in terminal to receive in those subframes of cluster downlink multicast channel, in public search space and the exclusive search volume based on T-RNTI definition, carry out T-RNTI add the PDCCH detection covered, when detecting in the exclusive search volume of group, only adopt the aforementioned fixing cluster PDCCH CCE degree of polymerization to search for simultaneously.
Above-mentioned processing procedure specifically can show as the handling process shown in Fig. 8, and as shown in Figure 8, this flow process comprises:
Step S802, starts;
Step S804, judges whether the subframe having planned colony dispatching, if go to step S806, otherwise, go to step S818;
Step S806, obtains the CCE degree of polymerization T of cluster group scheduling Downlink Control Information.
Does step S808, judge that the CCE degree of polymerization equals 8? if it is S810 is gone to step, otherwise, go to step S814;
Step S810, in public search space and the exclusive search volume of group that defined by T-RNTI, carries out T-RNTI by the CCE degree of polymerization 8 and adds the PDCCH blind Detecting covered.
Step S812, in public search space and the exclusive search volume of UE that defined by C-RNTI, carries out C-RNTI/SPS C-RNTI by the CCE degree of polymerization 1,2,4 respectively and adds the PDCCH blind Detecting covered.Go to step S820;
Step S814, in public search space and the exclusive search volume of group that defined by T-RNTI, carries out T-RNTI by the CCE degree of polymerization 4 and adds the PDCCH blind Detecting covered.Go to step S816;
Step S816, in public search space and the exclusive search volume of UE that defined by C-RNTI, carries out C-RNTI/SPS C-RNTI by the CCE degree of polymerization 1,2,8 respectively and adds the PDCCH blind Detecting covered.Go to step S820;
Step S818, in public search space and the exclusive search volume of UE that defined by C-RNTI, carries out C-RNTI/SPS C-RNTI by the CCE degree of polymerization 1,2,4,8 respectively and adds the PDCCH blind Detecting covered.
Step S820, terminates.
In the present embodiment, T-RNTI adds the degree of polymerization that the PDCCH that covers chooses, and to be not limited to 8 can also be other values, such as, see Fig. 7, add the PDCCH covered and choose the CCE degree of polymerization assuming that terminal known system is T-RNTI and be fixed as 4, in the exclusive search volume of group of that calculate based on T-RNTI, corresponding L=4, so carry out the detection that T-RNTI adds the PDCCH covered, show in figure, only need the detection being 2 PDCCH candidates.Meanwhile, terminal also can carry out at public search space the detection that T-RNTI adds the PDCCH covered.
Need in terminal to receive in those subframes of cluster downlink multicast channel, in public search space and the exclusive search volume of UE based on C-RNTI definition, carry out C-RNTI/SPS C-RNTI add the PDCCH detection covered, avoid the aforementioned fixing cluster PDCCH CCE degree of polymerization when detecting in the exclusive search volume of UE simultaneously and search for.
Such as, see Fig. 7, add the PDCCH covered and choose the CCE degree of polymerization assuming that terminal known system is T-RNTI and be fixed as 4, so calculate based on C-RNTI, respectively corresponding L=1,2 and 8 the exclusive search volume of UE in carry out the detection that C-RNTI or SPS C-RNTI adds the PDCCH covered.This meaning person, respectively corresponding L=1,2 and 8 the CCE degree of polymerization, need the detection being 6,6 and 2 PDCCH candidates successively.Meanwhile, terminal also can carry out at public search space the detection that C-RNTI or SPSC-RNTI add the PDCCH covered.
Therefore, see Fig. 7, when terminal is searched in public search space, the exclusive search volume in the exclusive search volume of UE and group: on the one hand, the PDCCH testing mechanism in public search space does not change relative to the original realization of LTE terminal; On the other hand, because the PDCCH CCE degree of polymerization in the exclusive search volume in the exclusive search volume of UE and group is without common factor, namely all in all still equal 1,2,4,8 to search for by the CCE degree of polymerization successively.Do not increase so total PDCCH detection complexity is compared with the original realization of LTE terminal, that is altogether need in each subframe to carry out at most 44 Viterbi decoding.
Visible by embodiment above, adopt the embodiment of the present invention, terminal can support in same subframe that the PDCCH in the exclusive search volume in the exclusive search volume of UE and group detects simultaneously, and the complexity that existing LTE terminal carries out PDCCH blind Detecting can not be increased, thus be conducive to carrying out quick transformation to support cluster communication function to existing LTE terminal.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a check processing method for Downlink Control Information, for network side entity, is characterized in that, comprising:
Be that each group configures a special exclusive search volume of group respectively for the cluster downlink multicast channel in broadband cluster communication system, wherein, the exclusive search volume of this group is identified by cluster wireless Network Temporary Identifier T-RNTI;
In the exclusive search volume of described group of configuration, distribute for physical downlink control channel PDCCH and specify the degree of polymerization, make colony terminal carry out blind Detecting according to the described appointment degree of polymerization to the PDCCH in the exclusive search volume of described group;
Distribute for physical downlink control channel PDCCH and specify the degree of polymerization, comprising:
The physical downlink control channel PDCCH covered is added to each described T-RNTI and distributes a described appointment degree of polymerization, wherein, the described appointment degree of polymerization and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and semi-continuous distribution cell-radio network identify SPS C-RNTI and add the PDCCH degree of polymerization covered without common factor;
Add after the physical downlink control channel PDCCH covered distributes a described appointment degree of polymerization to each described T-RNTI, also comprise:
Described colony terminal is being needed to receive in the subframe of cluster downlink multicast channel, the PDCCH degree of polymerization selecting C-RNTI and SPS C-RNTI to add from the degree of polymerization outside the described appointment degree of polymerization to cover.
2. method according to claim 1, is characterized in that, the exclusive search volume of described group configures in the following manner:
In the exclusive search volume of UE, divide specified search range as the exclusive search volume of described group.
3. method according to claim 1 and 2, is characterized in that, adds the physical downlink control channel PDCCH covered and distributes one and specify after the degree of polymerization, also comprise each described T-RNTI to T-RNTI:
The described appointment degree of polymerization is issued to colony terminal by the appointment signaling in system broadcast message or cluster downlink connection establishment process.
4. method according to claim 1 and 2, is characterized in that, also comprises:
Issue indication information to described colony terminal, wherein, this indication information is used to indicate the subframe needing to receive cluster downlink multicast channel.
5. a detection method for Downlink Control Information, for colony terminal, is characterized in that, comprising:
Receive the appointment degree of polymerization coming from network side entity, wherein, this appointment degree of polymerization is that network side entity is for the cluster downlink multicast channel in broadband cluster communication system, in the exclusive search volume of group of configuration, for the appointment degree of polymerization that physical downlink control channel PDCCH is distributed, further, the exclusive search volume of described group is identified by cluster wireless Network Temporary Identifier T-RNTI;
According to the described appointment degree of polymerization, blind Detecting is carried out to the PDCCH in the exclusive search volume of described group;
Wherein, to be described network side entity add to each described T-RNTI the degree of polymerization that the physical downlink control channel PDCCH covered distributes to the described appointment degree of polymerization, and the described appointment degree of polymerization and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and SPS C-RNTI add the PDCCH degree of polymerization covered without common factor;
After network side entity distributes the described appointment degree of polymerization, described colony terminal is being needed to receive in the subframe of cluster downlink multicast channel, the PDCCH degree of polymerization selecting C-RNTI and SPSC-RNTI to add from the degree of polymerization outside the described appointment degree of polymerization to cover.
6. a check processing device for Downlink Control Information, is arranged in network side entity, it is characterized in that, comprising:
Configuration module, for for the cluster downlink multicast channel in broadband cluster communication system, for each group configures a special exclusive search volume of group respectively, wherein, the exclusive search volume of this group is identified by cluster wireless Network Temporary Identifier T-RNTI;
Distribution module, in the exclusive search volume of described group of configuration, distribute for physical downlink control channel PDCCH and specify the degree of polymerization, wherein, colony terminal carries out blind Detecting according to the described appointment degree of polymerization to the PDCCH in the exclusive search volume of described group;
Described distribution module, a described appointment degree of polymerization is distributed specifically for adding the physical downlink control channel PDCCH covered to each described T-RNTI, wherein, the described appointment degree of polymerization and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and semi-continuous distribution cell-radio network identify SPS C-RNTI and add the PDCCH degree of polymerization covered without common factor;
Described distribution module, also specifically for adding after the physical downlink control channel PDCCH covered distributes a described appointment degree of polymerization to each described T-RNTI, described colony terminal is being needed to receive in the subframe of cluster downlink multicast channel, the PDCCH degree of polymerization selecting C-RNTI and SPSC-RNTI to add from the degree of polymerization outside the described appointment degree of polymerization to cover.
7. a checkout gear for Downlink Control Information, is arranged in colony terminal, it is characterized in that, comprising:
Receiver module, for receiving the appointment degree of polymerization coming from network side entity, wherein, this appointment degree of polymerization is that network side entity is for the cluster downlink multicast channel in broadband cluster communication system, in the exclusive search volume of group of configuration, for the degree of polymerization that physical downlink control channel PDCCH is distributed, and the exclusive search volume of described group is identified by cluster wireless Network Temporary Identifier T-RNTI;
Detection module, for carrying out blind Detecting according to the described appointment degree of polymerization to the PDCCH in the exclusive search volume of described group;
Wherein, to be described network side entity add to each described T-RNTI the degree of polymerization that the physical downlink control channel PDCCH covered distributes to the described appointment degree of polymerization, and the described appointment degree of polymerization and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and SPS C-RNTI add the PDCCH degree of polymerization covered without common factor;
After network side entity distributes the described appointment degree of polymerization, described colony terminal is being needed to receive in the subframe of cluster downlink multicast channel, the PDCCH degree of polymerization selecting C-RNTI and SPSC-RNTI to add from the degree of polymerization outside the described appointment degree of polymerization to cover.
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| CN111836205B (en) * | 2019-04-15 | 2022-05-17 | 海能达通信股份有限公司 | Multicast service implementation method based on cluster communication and related equipment |
| CN114982158B (en) * | 2020-12-30 | 2023-11-28 | 北京小米移动软件有限公司 | Parameter determining method, parameter determining device and storage medium |
| CN112839306B (en) * | 2021-01-11 | 2022-08-02 | 浪潮通信技术有限公司 | Method, system and device for transmitting cluster broadcast message supported by 5G NR (noise generation and noise reduction) |
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| CN102625457A (en) * | 2011-02-01 | 2012-08-01 | 中兴通讯股份有限公司 | Methods for sending, receiving and transmitting downlink control information and related devices |
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| CN102882644B (en) * | 2012-09-21 | 2015-09-16 | 中兴通讯股份有限公司 | The check processing of Downlink Control Information, detection method and device |
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| CN102333381A (en) * | 2011-10-28 | 2012-01-25 | 电信科学技术研究院 | Resource scheduling and data transmission methods and devices |
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