CN101646198A - Implementation method for downlink of LTE-Advanced system, base station and user equipment - Google Patents
Implementation method for downlink of LTE-Advanced system, base station and user equipment Download PDFInfo
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Abstract
The invention discloses an implementation method for a downlink of an LTE-Advanced system, and a corresponding base station and user equipment. The base station acquires information on the frequency band capability of the user equipment, allocates a corresponding working frequency band for the user equipment according to the user frequency band capacity and the loading condition on a system frequency band, and informs the user equipment of the frequency band allocation condition in a signaling mode.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly the implementation method of the down link of LTE-Advanced system and relevant base station and subscriber equipment.
Background technology
7～8 April in 2008,3GPP has held IMT AdvancedWorkshop meeting in China Shenzhen, and the demand of senior LTE (LTE-Advanced) and possible correlation technique motion have been discussed respectively in the meeting.In this meeting, many companies have proposed the frequency band problem of LTE-Advanced system and the rendezvous problem of frequency spectrum.After discussing and conferring, the chairman has submitted LTE-Advanced demand draft to, and (REV-080058, Draft LTE-AdvancedRequirements) spells out the band system band that the LTE-Advanced system need support maximum 100MHz in this draft.Band system band for 100MHz can be one section continuous frequency spectrum, also can obtain by the discrete frequency spectrum of multistage is carried out spectrum aggregation.Draft points out that also LTE system and LTE-Advanced system can coexist on same frequency spectrum simultaneously, that is to say that the LTE-Advanced system needs the subscriber equipment of forward compatibility LTE.
Wideer band system band is in order to obtain the desired higher peak rate of LTE-Advanced system.And the LTE-Advanced system is in order to ensure the smooth evolution of LTE system to the LTE-Advanced system to the compatibility of LTE subscriber equipment, and this helps arranging net of early stage LTE-Advanced system.Because for early stage LTE-Advanced system, the user device quantity of LTE before is possibly much larger than the LTE-Advanced user device quantity, be necessary to guarantee that these LTE subscriber equipmenies that carry over can be good at inserting the LTE-Advanced network, for they provide corresponding data, services.The frequency band of LTE system is designed to maximum 20MHz, the maximum band ability of LTE subscriber equipment also is 20MHz, LTE-Advanced system by 100MHz is had only the LTE subscriber equipment of 20MHz ability that compatible services is provided, this has proposed challenge for the design of LTE-Advanced system, especially controls the aspects such as design of signaling in frequency band division, broadcast channel synchronisation channel design and system.
PANASONIC has proposed a solution in the China Shenzhen meeting in April, 2008, (REV-080007, Technical proposals and considerations for LTEadvanced, Panasonic, 3GPP TSG RAN IMT-Advanced Workshop, Shenzhen, China, April 7-8,2008).In this scheme, band system band is divided into the sub-band of a plurality of 20MHz, and equal transfer synchronous channel and broadcast channel are to support the LTE subscriber equipment of 20MHz on the sub-band of each 20MHz.Huawei Company has also proposed their scheme in same meeting, (REV-080020, Framework for LTE-Advancedair-interface technology development, Huawei, 3GPP TSG RANIMT-Advanced Workshop, Shenzhen, China, April 7-8,2008).Point out in Huawei's scheme, the reference signaling of LTE, synchronizing channel, broadcast channel and control channel should transmit in LTE-Advanced components of system as directed frequency band at least, these channels can guarantee that the LTE subscriber equipment can normally insert in this part frequency band in the LTE-Advanced system.Transfer synchronous channel and broadcast channel in a plurality of frequency bands of LTE-Advanced system, they think the increase that can bring expense like this, the system design relative complex.Japanese NTT Docomo also holds the same viewpoint of Huawei Company in Kan. meeting in May, (R1-081948, Proposals for LTE-Advanced Technologies, NTT DoCoMo, 3GPP TSGRAN1 53rd meeting, Kansas City, MO, USA, 5-9May, 2008).And TIX expresses support for (R1-081979, Enhancements for LTE-Advanced, Texas Instruments to the scheme of PANASONIC in the same meeting, 3GPP TSG RAN1 53rd meeting, Kansas City, MO, USA, 5-9May, 2008).In emerging company another kind of scheme has been proposed, (R1-081773, Technical points for LTE-advanced in this meeting, ZTE, 3GPP TSG RAN1 53rdmeeting, Kansas City, MO, USA, 5-9May, 2008), be that band system band is divided into a plurality of sub-bands, wherein a certain sub-band is the dominant frequency band, and other is from frequency band, transmits the synchronous/broadcast channel and the control channel of LTE system on principal and subordinate's frequency band respectively.And also transmit in the dominant frequency band LTE-Advanced system synchronously/broadcast channel and control channel.
In three kinds of present schemes, Panasonic's scheme and in emerging scheme all need on a plurality of sub-bands, to transmit respectively corresponding LTE correlated channels, thereby make each frequency range in the LTE-Advanced system can both support the access of LTE subscriber equipment, this has proposed highly difficult challenge to its system design, also can increase the expense of system simultaneously greatly.Angle from real system, have the LTE-Advanced system that is multiple times than the LTE band system band and need not to support to be multiple times than the LTE number of users of LTE system, so can think that the receptive user device quantity of institute of LTE-Advanced system is basic suitable with the LTE system.Huawei's scheme is thought needs a sub-frequency bands to transmit corresponding LTE correlated channels at least, but need how to realize for its scheme, does not propose concrete scheme.Based on this, need a kind of technology of exploitation, make the LTE-Advanced system can be good at utilizing whole band system band to provide service for the LTE-Advanced subscriber equipment, the while is the subscriber equipment of forward compatibility LTE well.
Summary of the invention
The objective of the invention is to effectively solve the LTE-Advanced subscriber equipment of access various bandwidth ability in the LTE-Advanced system and the problem of compatible LTE subscriber equipment.Be specially, the bandwidth of LTE-Advanced system is considered to reach 100MHz, and the bandwidth ability of LTE-Advanced subscriber equipment also will guarantee the forward compatibility of system simultaneously possibly less than 100MHz, that is to say that the LTE-Advanced system must compatible LTE subscriber equipment.How efficiently for the LTE subscriber equipment provides service, do not influence the business of the LTE-Advanced subscriber equipment of the various bandwidth ability with bigger band capability simultaneously, this is one of LTE-Advanced system design and standardization problem demanding prompt solution.
In order to realize these and/or other advantage, and according to purpose of the present invention, as concrete and broadly described herein, the present invention is embodied in a kind of method and apparatus of the LTE-Advanced of being applied to mobile communication system, it is convenient to the LTE-Advanced system can effective compatible LTE subscriber equipment, and the LTE-Advanced subscriber equipment for bigger band capability provides data service at a high speed simultaneously.Especially, propose a kind of implementation method of down link, in the LTE-Advanced process of user equipment access, carried out bandwidth assignment, and by corresponding signaling mechanism notifying user equipment.
In one aspect of the invention, a kind of implementation method of LTE-Advanced system down link has been proposed, comprise: dominant frequency band determining step, in the band system band scope, determine the dominant frequency band of one section frequency band as system, control signaling in this dominant frequency band, channel design all with the LTE system compatible, and comprise all other LTE-Advanced system informations except that the system information of the LTE of LTE compatible broadcast channel radio definition in this dominant frequency band, and comprise the down control channel information that the LTE-Advanced system is public in this dominant frequency band; The sub-band division step is the frequency band division beyond the dominant frequency band a sub-band more than 1; Frequency band allocation step, if the minimum band capability of the user of system definition is less than system bandwidth, then the base station is based on the band capability information that receives from subscriber equipment, be this subscriber equipment chooser frequency band, associating dominant frequency band is as the working band of this subscriber equipment, in this working band, determine to distribute the sub-band of PDCCH for subscriber equipment, and the sub-band information that sends the working band assignment information and distribute PDCCH by signaling is to subscriber equipment, if the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the working band of default user equipment is the whole system bandwidth; Transmitting step according to the minimum band capability of the user of system definition, carries out distribution and the testing process of PDCCH in its working band.
According to embodiments of the invention, if being assembled by a plurality of discrete frequency bands, the LTE-Advanced band system band forms, then this dominant frequency band is positioned at one section sequential frequency band of bandwidth maximum.
According to embodiments of the invention, if the LTE-Advanced band system band is continuous, then this dominant frequency band is positioned at the center of this LTE-Advanced band system band, and the center frequency point of this dominant frequency band is on the channel grid of LTE system definition (channel raster).
According to embodiments of the invention, this LTE-Advanced system information comprises the frequency point information and the sub-band size information of LTE-Advanced system.
According to embodiments of the invention, the base station can be this user equipment allocation sub-band according to the subscriber equipment band capability.
According to embodiments of the invention, the base station is this user equipment allocation sub-band according to subscriber equipment band capability and the current loading condition of each sub-frequency bands.
According to embodiments of the invention, this frequency band allocation information is sent to subscriber equipment for the high-level signaling on first subframe of this dispatching user facility from the base station by the base station.
According to embodiments of the invention, the working band of first subframe of this dispatching user facility is the dominant frequency band.
According to embodiments of the invention, this dominant frequency band determining step and this sub-band division step can be carried out in the system initialization process.
According to embodiments of the invention, this frequency band allocation step is being carried out in the subscriber equipment random access procedure.
According to embodiments of the invention, in this frequency band allocation step, subscriber equipment by the RRC connectivity request message in the random access procedure to base station reporting user facility band capability information.
According to embodiments of the invention, in this frequency band allocation step, this frequency band allocation information can solve signaling by the competition in the random access procedure and be sent to subscriber equipment from the base station.
According to embodiments of the invention, if the minimum band capability of the user of system definition is less than system bandwidth, then the PDCCH assigning process that defines in the LTE system is implemented in the base station on the sub-band of described distribution PDCCH, subscriber equipment carries out the PDCCH blind detection process that defines in the LTE system according to the sub-band information of the described distribution PDCCH that receives.
According to embodiments of the invention, if the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the PDCCH assigning process is implemented in the base station on the system bandwidth outside the dominant frequency band, and subscriber equipment is implemented the PDCCH blind detection process on the system bandwidth outside the dominant frequency band.
According to embodiments of the invention, if the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the PDCCH assigning process of LTE definition is preferentially implemented in the base station for it on the dominant frequency band for the LTE subscriber equipment, implements the PDCCH assigning process for the LTE-Advanced subscriber equipment then on system bandwidth.The LTE-Advanced subscriber equipment is implemented the PDCCH blind Detecting in band system band, the LTE subscriber equipment is implemented the PDCCH blind Detecting of LTE definition in the dominant frequency band.
In another aspect of this invention, proposed a kind of base station, having comprised: transmission/receiving element receives the band capability information from subscriber equipment; Access control/scheduling unit, if the minimum band capability of the user of system definition is less than system bandwidth, then according to the subscriber equipment band capability information that receives, be subscriber equipment chooser frequency band, associating dominant frequency band is as the working band of this subscriber equipment, in this working band, determine to distribute the sub-band of PDCCH for subscriber equipment, and the sub-band information that sends the working band assignment information by transmission/receiving element and distribute PDCCH by signaling is to subscriber equipment, if the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the working band of default user equipment is the whole system bandwidth; And the assigning process that in the subscriber equipment working band, carries out PDCCH for it.。
According to embodiments of the invention, this access control/scheduling unit is this user equipment allocation sub-band according to the subscriber equipment band capability.
According to embodiments of the invention, this access control/scheduling unit is this user equipment allocation sub-band according to subscriber equipment band capability and the current loading condition of each sub-frequency bands.
According to embodiments of the invention, this transmission/receiving element is by being sent to subscriber equipment with this frequency band allocation information from the base station for the high-level signaling on first subframe of this dispatching user facility.
According to embodiments of the invention, this transmission/receiving element solves signaling by the competition in the random access procedure this frequency band allocation information is sent to subscriber equipment from the base station.
In still another aspect of the invention, proposed a kind of subscriber equipment, having comprised: transmission/receiving element, the band capability information that sends this subscriber equipment is to the base station; The PDCCH detecting unit carries out the testing process of PDCCH in its working band.
According to embodiments of the invention, this transmission/receiving element by the RRC connectivity request message in the random access procedure to base station reporting user facility band capability information.
The scheme that is provided by foregoing invention as can be seen, the present invention is by setting up the major-minor frequency band, make the complete compatible LTE of dominant frequency band system, can be good to the LTE subscriber equipment provides service, comprise system information, synchronizing information and common control information simultaneously in the dominant frequency band towards all subscriber equipmenies.Carry out bandwidth assignment by the base station,, fully effectively utilized all subbands for each LTE-Advanced user equipment allocation working band.Above simplicity of design is effective, with the design of low complex degree, has realized the compatibility of LTE-Advanced system to the LTE subscriber equipment, and the data communication of two-forty is provided for LTE subscriber equipment, the multistage subscriber equipment of LTE-Advanced simultaneously.
Description of drawings
By below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:
Fig. 1 is the LTE-Advanced system architecture diagram;
Fig. 2 is the base station equipment block diagram of LTE-Advanced system;
Fig. 3 is a LTE-Advanced subscriber equipment block diagram;
Fig. 4 is the LTE-Advanced subscriber equipment obtains frequency band allocation information by random access procedure signaling process figure;
Fig. 5 is the LTE-Advanced subscriber equipment obtains frequency band allocation information by high-level signaling signaling process figure;
Fig. 6 is a channel Mapping schematic diagram in the LTE-Advanced system;
Fig. 7 is LTE subscriber equipment and LTE-Advanced subscriber equipment gained bandwidth assignment schematic diagram in the LTE system.
Embodiment
To be described embodiments of the invention below in conjunction with the accompanying drawings.In the description process below, having omitted is unnecessary details and function for the present invention, obscures to prevent that the understanding of the present invention from causing.
For clear detailed elaboration performing step of the present invention, provided specific embodiments of the invention below, be applicable to the LTE-Advanced cell mobile communication systems.Need to prove, the invention is not restricted to this application, but applicable to other related mobile communication system.
With reference to figure 1, the Organization Chart of LTE-Advanced system has been described wherein.Base station 101 is professional control centres of system, and it carries out the scheduling of resource of subscriber equipment in the sub-district and the transmission of data service.LTE subscriber equipment 102, the LTE system leaves over subscriber equipment, and the control signaling working mechanism that adopts the LTE system fully carries out work in the frequency band of LTE system definition.
LTE-Advanced subscriber equipment 103 can adopt the mechanism of LTE-Advanced system definition to carry out work in the frequency band of LTE-Advanced system definition.The LTE-Advanced system can be transparent provide corresponding data, services for two class subscriber equipmenies.LTE-Advanced system architecture among Fig. 1 is only for illustrative purpose, and do not mean that the present invention needs above-mentioned restrictive specified conditions in the enforcement of mobile communication system.
According to the description of Fig. 1, the LTE-Advanced system comprises at least one base station 101, and several LTE subscriber equipment 102 and several LTE-Advanced subscriber equipmenies 103 are distributing in the sub-district of base station 101.Base station 101 scheduling is also controlled each LTE subscriber equipment 102 and the LTE-Advanced subscriber equipment 103 that distributes in its sub-district by signaling method.
Base station 101 according to the present invention has frame structure as shown in Figure 2.Particularly, base station 101 comprises: transmission/receiving element 1010, be used for the sub-district in subscriber equipment carry out signaling and data communication; Access control/scheduling unit 1011 is used for the user of initial access is carried out access control and allocated frequency band resource; Decision unit 1012 is used for user device type is adjudicated, just according to judging that from the random access information of subscriber equipment this subscriber equipment is LTE subscriber equipment or LTE-Advanced subscriber equipment.
LTE-Advanced subscriber equipment 103 according to the present invention has block diagram as shown in Figure 3.Particularly, LTE-Advanced subscriber equipment 103 comprises: transmission/receiving element 1030 is used for carrying out signaling and data communication with base station 101; Access unit 1031 at random, according to the type generation random access information of subscriber equipment self; Information acquisition unit 1033 is obtained the band capability and the system bandwidth size of subscriber equipment, so that determine that this subscriber equipment is LTE subscriber equipment or LTE-Advancd subscriber equipment; Filtering adjustment unit 1032 according to the frequency band allocation information that receives, is adjusted filter parameter, thereby is convenient to the reception from the information of base station.In addition, this subscriber equipment also comprises PDCCH detecting unit 1034, is used for all sub-bands in the working band are carried out the PDCCH blind detection process that the LTE system defines.Describe the operating process of above-mentioned each unit of base station and subscriber equipment below in detail with the form of embodiment.
Though in Fig. 2 and Fig. 3, realized the structure of applied base station of the embodiment of the invention and subscriber equipment with concrete unit module, but just as known to persons of ordinary skill in the art, the present invention is not limited to these concrete unit modules, also can integrate, split or reconfigure, and can realize according to the form of software, hardware or its combination to some or all modules wherein.
Below, will be in conjunction with Fig. 4～7, the implementation method of the LTE-Advanced system down link that the embodiment of the invention proposed is made a more detailed description.
According to the embodiment of the invention, the band allocating method of a kind of LTE-Advanced system has been proposed.Specific as follows, the bandwidth of LTE-Advanced band system band is Ba, according to present LTE-Advanced session discussing draft resolution, can establish LTE-Advanced system bandwidth Ba=100MHz; The bandwidth of LTE band system band is B, and according to the resolution of present LTE, its band system band bandwidth range is 1.25～20MHz, establishes LTE system bandwidth B=20MHz in this example.
According to embodiments of the invention, the middle B megahertz of setting in the LTE-Advanced band system band Ba megahertz (being 100MHz in the example) (being 20MHz in the example) is a dominant frequency band, the center frequency point of this dominant frequency band is on the frequency of 100kHz integral multiple, (size of LTE system channel raster (raster) is 100kHz).As shown in Figure 6, in this dominant frequency band, the design of complete compatible LTE, promptly in this 20MHz frequency band, the broadcast channel BCH of LTE system, synchronous channel SCH, and control channel PDCCH is fully according to existing LTE system design.In addition, also should comprise the broadcast channel of LTE-Advanced system in this 20MHz dominant frequency band, the broadcast channel of this LTE-Advanced system can be made up of the broadcast channel and the distinctive broadcast channel (BCH-A) of augmenting of LTE-Advanced of LTE system.The LTE subscriber equipment can obtain the system information of LTE system by BCH.The LTE-Advanced subscriber equipment can obtain the system information of LTE-Advanced system by associating BCH and BCH-A.In addition, the Common Control Channel of system (PCCCH Common Search Space) is positioned at this dominant frequency band.
Here, form if the LTE-Advanced band system band is assembled by a plurality of discrete frequency bands, then the dominant frequency band is positioned at one section sequential frequency band of bandwidth maximum.Select as another, if the LTE-Advanced band system band is continuous, then described dominant frequency band is positioned at the centre of described LTE-Advanced band system band, and its center frequency point is on the frequency of 100kHz integral multiple.
In addition, set in the LTE-Advanced band system band in the middle of the outer frequency band of B megahertz be subband, subband can be divided into multistage according to system design, is example with every section 10MHz in this example, then subband can be made up of 8 sub-frequency bands.
According to the embodiment of the invention, if the minimum band capability of the user of system definition is during less than system bandwidth, the LTE-Advanced subscriber equipment is when the beginning connecting system, and the access control/scheduling unit 1011 of base station is required to be its distribution of carrying out working band and is notified to this subscriber equipment by transmission/receiving element 1010.Fig. 4 shows a kind of flow chart of concrete this process of enforcement.
Transmission/the receiving element 1030 of LTE-Advanced subscriber equipment carries out system synchronization operation, the simultaneous operation between LTE-Advanced subscriber equipment and the base station 101 just by the synchronous channel SCH in the dominant frequency band.
Then, the information acquisition unit 1033 of LTE-Advanced subscriber equipment is by the broadcast channel BCH in the dominant frequency band and augment broadcast channel BCH-A and obtain system information, this system information is except comprising all system informations of LTE system, the frequency point information that also comprises the LTE-Advanced system, sub-band size information.
Next, the LTE-Advanced subscriber equipment compares the system bandwidth in the gained system information and its band capability, if system bandwidth is smaller or equal to its band capability, then the access unit at random 1031 of this subscriber equipment carries out the access procedure that defines in the LTE system, if system bandwidth is greater than its band capability, then this subscriber equipment carries out following access procedure.
As shown in Figure 4, the LTE-Advanced subscriber equipment initiates to insert request 1. at random by Random Access Channel (RACH).Then,
2. the base station sends accidental access response information to this LTE-Advanced subscriber equipment.
Transmission/the receiving element 1030 of LTE-Advanced subscriber equipment is by additional user devices band capability information in the RRC connectivity request message of the message of general controls channel (CCCH) in random access procedure in 3., the band capability of this subscriber equipment of report base station.
Access control/the scheduling unit 1011 of base station is according to the band capability of the subscriber equipment that receives, and current system load situation and each sub-frequency bands loading condition distribute the sub-band of PDCCH for LTE-Advanced user equipment allocation working band and definite its that request inserts.Fig. 7 provides the bandwidth assignment example of a plurality of subscriber equipmenies.Band capability as certain LTE-Advanced subscriber equipment is 60MHz, and this 60MHz also should comprise the secondary sub-band of 4 10MHz except comprising fixing 20MHz dominant frequency band.Obtain the user device quantity that distributes on each sub-band, it is sorted, take out 4 minimum subband allocation and give this subscriber equipment.
Then, 4. the base station sends to this subscriber equipment to the sub-band information of the frequency band allocation information of this subscriber equipment and distribution PDCCH by the message in the random access procedure.The filtering adjustment unit 1032 of subscriber equipment is adjusted filter parameter according to the frequency band allocation information that receives, thereby is convenient to the reception from the information of base station.
According to the embodiment of the invention, if the minimum band capability of the user of system definition during less than system bandwidth, the LTE-Advanced subscriber equipment is when the beginning connecting system, and the base station is required to be it and carries out the distribution of working band and be notified to this subscriber equipment.Fig. 5 shows the another kind of concrete flow chart of implementing this process.
Transmission/the receiving element 1030 of LTE-Advanced subscriber equipment carries out system synchronization operation, the simultaneous operation between LTE-Advanced subscriber equipment and the base station 101 just by the synchronous channel SCH in the dominant frequency band.
Then, the information acquisition unit 1033 of LTE-Advanced subscriber equipment is by the broadcast channel BCH in the dominant frequency band and augment broadcast channel BCH-A and obtain system information, this system information is except comprising all system informations of LTE system, the frequency point information that also comprises the LTE-Advanced system, sub-band size information.
Next, the LTE-Advanced subscriber equipment compares the system bandwidth in the gained system information and its band capability, if system bandwidth is smaller or equal to its band capability, then the access unit at random 1031 of this subscriber equipment carries out the access procedure that defines in the LTE system, if system bandwidth is greater than its band capability, then this subscriber equipment carries out following access procedure.
As shown in Figure 5, the access unit at random 1030 of LTE-Advanced subscriber equipment initiates to insert request 1. at random by Random Access Channel (RACH).Then, 2. transmission/the receiving element 1010 of base station sends accidental access response information to this LTE-Advanced subscriber equipment.
Transmission/the receiving element 1030 of LTE-Advanced subscriber equipment is by additional user devices band capability information in the RRC connectivity request message of the message of general controls channel (CCCH) in random access procedure in 3., the band capability of this subscriber equipment of report base station.
Access control/the scheduling unit 1011 of base station is according to the band capability of the subscriber equipment that receives, and current system load situation and each sub-frequency bands loading condition are for inserting LTE-Advanced user equipment allocation working band and determining the sub-band that it distributes PDCCH.Fig. 7 provides the bandwidth assignment example of a plurality of subscriber equipmenies.Band capability as certain LTE-Advanced subscriber equipment is 60MHz, and this 60MHz also should comprise the secondary sub-band of 4 10MHz except comprising fixing 20MHz dominant frequency band.Obtain the user device quantity that distributes on each sub-band, it is sorted, take out 4 minimum subband allocation and give this subscriber equipment.
Then, 4. transmission/the receiving element 1010 of base station sends competition to this subscriber equipment by the message of general controls channel (CCCH) in random access procedure and solves (ContentionResolution) information (signaling).
Access control/scheduling unit 1011 scheduling LTE-Advanced subscriber equipmenies of base station are dispatched the sub-band information of transmitting the working band assignment information and distributing PDCCH by high-level signaling in the subframe its first.Subscriber equipment is operated on the dominant frequency band in its first scheduling subframe.
The PDCCH detecting unit 1034 of LTE-Advanced subscriber equipment obtains the PDSCH resource allocation information according to the PDCCH information on the dominant frequency band, reads the sub-band information that corresponding PDSCH obtains its working band assignment information and distributes PDCCH.
On follow-up scheduling subframe, this LTE-Advanced subscriber equipment then is operated on the working band that is assigned to.At this moment, filtering adjustment unit 1032 is adjusted filter parameter according to the frequency band allocation information that receives, thereby is convenient to the reception from the information of base station.
In addition, according to the embodiment of the invention, the method for transmission LTE-Advanced system descending control signaling specifically describes as follows when also proposing the minimum band capability of a kind of user when system definition less than system bandwidth.
PDCCH common search part (common searchspace) unique in the LTE-Advanced system is positioned at the dominant frequency band, the PDCCH common search part that can be multiplexing defines in the LTE system is as the PDCCH common search part of LTE-Advanced system, also the PDCCH common search part of a LTE-Advanced system of definition in the dominant frequency band again.
The PDCCH assigning process of LTE-Advanced system is described below.
The base station for selecting a certain definite frequency band for the LTE-Advanced subscriber equipment, is implemented the PDCCH assigning process that defines in the LTE system according to a certain special algorithm in this frequency band.
The PDCCH detecting unit 1034 of LTE-Advanced subscriber equipment is on the sub-band shown in the sub-band information of the distribution PDCCH that receives, carry out the PDCCH blind detection process that defines in the LTE system with Downlink Control Information (DCI) form of a redetermination, this PDCCH information should comprise all resource allocation informations on this subscriber equipment place working band.
According to embodiments of the invention, the method for the minimum band capability of another kind of user when system definition transmission LTE-Advanced system descending control signaling during less than system bandwidth can be described below: the PDCCH assigning process that defines in the enforcement LTE system on all sub-bands in LTE-Advanced subscriber equipment working band of base station.All sub-bands in 1034 pairs of place working bands of the PDCCH detecting unit of LTE-Advanced subscriber equipment carry out the PDCCH blind detection process that defines in the LTE system, and the PDCCH in each sub-frequency bands indicates corresponding PDSCH relevant information in this frequency band with the mode and Downlink Control Information (DCI) form of LTE system compatible.
According to embodiments of the invention, if the minimum band capability of the user of system definition more than or equal to system bandwidth, then the working band of default user equipment is the whole system bandwidth.For the LTE subscriber equipment, the PDCCH assigning process that defines in the LTE system is implemented at the dominant frequency band in the base station for it.The LTE subscriber equipment is then implemented the PDCCH blind detection process of LTE definition in the dominant frequency band.For the LTE-Advanced subscriber equipment, the base station is that it implements the PDCCH assigning process on the system bandwidth outside the dominant frequency band, and the LTE-Advanced subscriber equipment is implemented the PDCCH blind detection process on the system bandwidth outside the dominant frequency band.
According to embodiments of the invention, if the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the PDCCH assigning process of LTE definition is preferentially implemented in the base station for it on the dominant frequency band for the LTE subscriber equipment, implements the PDCCH assigning process for the LTE-Advanced subscriber equipment then on system bandwidth.The LTE-Advanced subscriber equipment is implemented the PDCCH blind Detecting in band system band, the LTE subscriber equipment is implemented the PDCCH blind Detecting of LTE definition in the dominant frequency band.
By with the uplink downlink implementation procedure, LTE subscriber equipment and LTE-Advanced subscriber equipment all can well insert the system of LTE-Advanced, obtain the high data rate service that the LTE-Advanced system brings.This simplicity of design is effective simultaneously, has reduced the complexity of system design, has satisfied the demand of actual subscriber device.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that those skilled in the art can carry out various other change, replacement and interpolations under the situation that does not break away from the spirit and scope of the present invention.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited by claims.
Claims (22)
1. the implementation method of a LTE-Advanced system down link comprises:
Dominant frequency band determining step, in the band system band scope, determine the dominant frequency band of a cross-talk frequency band as system, control signaling in the described dominant frequency band, channel design all with the LTE system compatible, and comprise all other LTE-Advanced system informations except that the system information of the LTE of LTE compatible broadcast channel radio definition in the described dominant frequency band, and comprise the down control channel information that the LTE-Advanced system is public in the described dominant frequency band;
The sub-band division step is the frequency band division beyond the dominant frequency band a sub-band more than 1;
Frequency band allocation step, if the minimum band capability of the user of system definition is less than system bandwidth, then the base station is this subscriber equipment chooser frequency band based on the band capability information that receives from subscriber equipment, associating dominant frequency band is as the working band of this subscriber equipment, in described working band, determine to distribute the sub-band of PDCCH for subscriber equipment, and the sub-band information that sends the working band assignment information and distribute PDCCH by signaling is to subscriber equipment, if the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the working band of default user equipment is the whole system bandwidth;
Transmitting step carries out distribution and the testing process of PDCCH in each subscriber equipment working band.
2. according to the implementation method described in the claim 1, it is characterized in that:
Form if the LTE-Advanced band system band is assembled by a plurality of discrete frequency bands, then described dominant frequency band is positioned at one section sequential frequency band of bandwidth maximum.
3. according to the implementation method described in the claim 1, it is characterized in that:
If the LTE-Advanced band system band is continuous, then described dominant frequency band is positioned at the center of described LTE-Advanced band system band, and the center frequency point of described dominant frequency band is on the channel grid of LTE system definition (channel raster).
4. according to the implementation method described in the claim 1, it is characterized in that:
Described LTE-Advanced system information comprises the frequency point information and the sub-band size information of LTE-Advanced system.
5. according to the implementation method described in the claim 1, it is characterized in that:
The base station can be described user equipment allocation sub-band according to the subscriber equipment band capability.
6. according to the implementation method described in the claim 1, it is characterized in that:
The base station is described user equipment allocation sub-band according to subscriber equipment band capability and the current loading condition of each sub-frequency bands.
7. according to the implementation method described in the claim 1, it is characterized in that:
Described frequency band allocation information is sent to subscriber equipment for the high-level signaling on first subframe of this dispatching user facility from the base station by the base station.
8. according to the implementation method described in the claim 7, it is characterized in that:
The working band of first subframe of described dispatching user facility is the dominant frequency band.
9. according to the implementation method described in the claim 1, it is characterized in that:
Described dominant frequency band determining step and described sub-band division step can be carried out in the system initialization process.
10. according to the implementation method described in the claim 1, it is characterized in that:
Described frequency band allocation step is carried out in the subscriber equipment random access procedure.
11. the implementation method according to Claim 8 is characterized in that:
In the described frequency band allocation step, subscriber equipment by the RRC connectivity request message in the random access procedure to base station reporting user facility band capability information.
12. the implementation method according to Claim 8 is characterized in that:
In the described frequency band allocation step, described frequency band allocation information can solve signaling by the competition in the random access procedure and be sent to subscriber equipment from the base station.
13. the implementation method according to described in the claim 1 is characterized in that:
If the minimum band capability of the user of system definition is less than system bandwidth, then the PDCCH assigning process that defines in the LTE system is implemented in the base station on the sub-band of described distribution PDCCH, subscriber equipment carries out the PDCCH blind detection process that defines in the LTE system according to the sub-band information of the described distribution PDCCH that receives.
14. the implementation method according to described in the claim 1 is characterized in that:
If the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the PDCCH assigning process is implemented in the base station on the system bandwidth outside the dominant frequency band, and subscriber equipment is implemented the PDCCH blind detection process on the system bandwidth outside the dominant frequency band.
15. the implementation method according to described in the claim 1 is characterized in that:
If the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the PDCCH assigning process of LTE definition is preferentially implemented in the base station for it on the dominant frequency band for the LTE subscriber equipment, implements the PDCCH assigning process for the LTE-Advanced subscriber equipment then on system bandwidth.The LTE-Advanced subscriber equipment is implemented the PDCCH blind Detecting in band system band, the LTE subscriber equipment is implemented the PDCCH blind Detecting of LTE definition in the dominant frequency band.
16. a base station comprises:
Transmission/receiving element receives the band capability information from subscriber equipment;
Access control/scheduling unit, if the minimum band capability of the user of system definition is less than system bandwidth, be subscriber equipment chooser frequency band then according to the subscriber equipment band capability information that receives, associating dominant frequency band is as the working band of this subscriber equipment, in described working band, determine to distribute the sub-band of PDCCH for subscriber equipment, and the sub-band information that sends the working band assignment information by transmission/receiving element and distribute PDCCH by signaling is to subscriber equipment, if the minimum band capability of the user of system definition is more than or equal to system bandwidth, then the working band of default user equipment is the whole system bandwidth; And
Described transmission/receiving element carries out the assigning process of PDCCH for it in the subscriber equipment working band.
17. the base station according to described in the claim 16 is characterized in that:
Described access control/scheduling unit is described user equipment allocation sub-band according to the subscriber equipment band capability.
18. the base station according to described in the claim 16 is characterized in that:
Described access control/scheduling unit is described user equipment allocation sub-band according to subscriber equipment band capability and the current loading condition of each sub-frequency bands.
19. according to described in the claim 16 the base station, it is characterized in that:
Described transmission/receiving element is by being sent to subscriber equipment with described frequency band allocation information from the base station for the high-level signaling on first subframe of this dispatching user facility.
20. the base station according to described in the claim 16 is characterized in that:
Described transmission/receiving element solves signaling by the competition in the random access procedure described frequency band allocation information is sent to subscriber equipment from the base station.
21. a subscriber equipment comprises:
Transmission/receiving element, the band capability information that sends described subscriber equipment is to the base station;
The PDCCH detecting unit carries out the testing process of PDCCH in its working band.
22. the subscriber equipment according to described in the claim 21 is characterized in that:
Described transmission/receiving element by the RRC connectivity request message in the random access procedure to base station reporting user facility band capability information.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810129700 CN101646198B (en) | 2008-08-07 | 2008-08-07 | Implementation method for downlink of LTE-Advanced system, base station and user equipment |
| PCT/JP2009/064069 WO2010016596A1 (en) | 2008-08-07 | 2009-08-07 | Base station, communication terminal, communication system, base station control method, communication terminal control method, communication system control method, control program, and recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810129700 CN101646198B (en) | 2008-08-07 | 2008-08-07 | Implementation method for downlink of LTE-Advanced system, base station and user equipment |
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| Publication Number | Publication Date |
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| CN101646198A true CN101646198A (en) | 2010-02-10 |
| CN101646198B CN101646198B (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200810129700 Expired - Fee Related CN101646198B (en) | 2008-08-07 | 2008-08-07 | Implementation method for downlink of LTE-Advanced system, base station and user equipment |
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| Country | Link |
|---|---|
| CN (1) | CN101646198B (en) |
| WO (1) | WO2010016596A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012136059A1 (en) * | 2011-04-02 | 2012-10-11 | 中兴通讯股份有限公司 | Resource scheduling method, user equipment, and base station |
| WO2013044771A1 (en) * | 2011-09-30 | 2013-04-04 | 电信科学技术研究院 | Method and device for transmitting downlink control information |
| WO2013097120A1 (en) * | 2011-12-28 | 2013-07-04 | 富士通株式会社 | Mapping method and device for search space of downlink control channel |
| WO2014005282A1 (en) * | 2012-07-03 | 2014-01-09 | 华为技术有限公司 | Information transmission method, user equipment, and network device |
| WO2015172275A1 (en) * | 2014-05-12 | 2015-11-19 | 华为技术有限公司 | Downlink signal transmission method, base station and user equipment |
| WO2018196632A1 (en) * | 2017-04-24 | 2018-11-01 | 中国移动通信有限公司研究院 | Uplink transmission scheduling method, terminal and base station |
| WO2018233597A1 (en) * | 2017-06-19 | 2018-12-27 | 中兴通讯股份有限公司 | Resource allocation method and apparatus |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2547002B1 (en) | 2010-03-12 | 2015-02-25 | Electronics and Telecommunications Research Institute | Method and apparatus for transmitting and receiving data in a mimo system |
| CN102263604B (en) | 2010-05-25 | 2014-07-16 | 中兴通讯股份有限公司 | LTE (long term evolution) PDCCH (physical downlink control channel) demapping method and device |
| CN102378370B (en) * | 2010-08-13 | 2014-10-29 | 电信科学技术研究院 | Method and device for processing carrier aggregation capacity |
Citations (1)
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| CN101227717A (en) * | 2008-01-05 | 2008-07-23 | 中兴通讯股份有限公司 | User equipment, base station and method for testing and presenting PUCCH transmission state |
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- 2008-08-07 CN CN 200810129700 patent/CN101646198B/en not_active Expired - Fee Related
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101227717A (en) * | 2008-01-05 | 2008-07-23 | 中兴通讯股份有限公司 | User equipment, base station and method for testing and presenting PUCCH transmission state |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012136059A1 (en) * | 2011-04-02 | 2012-10-11 | 中兴通讯股份有限公司 | Resource scheduling method, user equipment, and base station |
| CN102740485A (en) * | 2011-04-02 | 2012-10-17 | 中兴通讯股份有限公司 | Method, user equipment, and base station of resource scheduling |
| WO2013044771A1 (en) * | 2011-09-30 | 2013-04-04 | 电信科学技术研究院 | Method and device for transmitting downlink control information |
| WO2013097120A1 (en) * | 2011-12-28 | 2013-07-04 | 富士通株式会社 | Mapping method and device for search space of downlink control channel |
| US11160065B2 (en) | 2011-12-28 | 2021-10-26 | Fujitsu Limited | Mapping method and apparatus for a search space of a physical downlink control channel |
| WO2014005282A1 (en) * | 2012-07-03 | 2014-01-09 | 华为技术有限公司 | Information transmission method, user equipment, and network device |
| CN103718634A (en) * | 2012-07-03 | 2014-04-09 | 华为技术有限公司 | Information transmission method, user equipment, and network device |
| WO2015172275A1 (en) * | 2014-05-12 | 2015-11-19 | 华为技术有限公司 | Downlink signal transmission method, base station and user equipment |
| WO2018196632A1 (en) * | 2017-04-24 | 2018-11-01 | 中国移动通信有限公司研究院 | Uplink transmission scheduling method, terminal and base station |
| WO2018233597A1 (en) * | 2017-06-19 | 2018-12-27 | 中兴通讯股份有限公司 | Resource allocation method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2010016596A1 (en) | 2010-02-11 |
| CN101646198B (en) | 2013-10-30 |
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