CN103095443B - Enhancement mode PDCCH implementation method and equipment - Google Patents
Enhancement mode PDCCH implementation method and equipment Download PDFInfo
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- CN103095443B CN103095443B CN201110338606.2A CN201110338606A CN103095443B CN 103095443 B CN103095443 B CN 103095443B CN 201110338606 A CN201110338606 A CN 201110338606A CN 103095443 B CN103095443 B CN 103095443B
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Abstract
The invention discloses a kind of enhancement mode PDCCH implementation method and equipment, in order to increase the capacity of traditional LTE system PDCCH system.Wherein, described enhancement mode PDCCH implementation method, comprise: for each user terminal UE, determine the available orthogonal frequency division multiplex OFDM value of symbol into the enhancement mode Physical Downlink Control Channel E-PDCCH of this UE control channel and available frequency resources information; And from frequency resource corresponding to described available frequency resources information, be defined as the frequency resource that described E-PDCCH distributes.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of enhancement mode PDCCH implementation method and equipment.
Background technology
At Long Term Evolution (LTE, Long Time Evolution) in R8/R9/R10 system, a time tranfer interval (TTI, Transmission Time Internal) to inner, several OFDM (OFDM above, Orthogonal Frequency Division Multiplexing) symbol be used for Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) transmission, OFDM symbol is below used for the transmission of data.In tradition LTE system, according to the difference of system configuration, for the system (downlink system is greater than 10 Physical Resource Block (PRB, Physical Resource Block)) that bandwidth is larger, PDCCH may take 1-3 OFMD symbol; For the system (downlink system is less than or equal to 10 PRB) that bandwidth is less, take 2-4 OFDM symbol, this is because in each OFDM symbol, the number of subcarrier is less, therefore need more symbol to carry the control information in PDCCH, and by Physical Control Format Indicator Channel (PCFICH, Physical Control Format Indicator Channel) indicating user terminal (UE, User Equipment) PDCCH specifically takies how many OFDM symbol.UE is by detecting PCFICH channel information, and just can know in the transmission of current time, PDCCH occupies several OFDM symbol, and transfer of data is from which OFDM symbol.As shown in Figure 1, in traditional LTE, PDCCH and data channel OFDM symbol take schematic diagram, and wherein, abscissa represents OFDM symbol value, and ordinate represents frequency domain resource, and in Fig. 1, PDCCH takies 3 OFDM symbol.
From LTE R8 system, multiple-input and multiple-output (MIMO, Multiple-Input Multiple-Out-put) technology acquisition extensive use, especially in LTE R9 and R10 system, multi-user's multiple-input and multiple-output (MU-MIMO, Multi-User-Multiple-Input Multiple-Out-put) technology waited until and strengthened and optimize, therefore, in LTE R9 and R10 system, the user terminal working in MU-MIMO will increase greatly, transmit while supporting a large number of users, challenge is proposed to the capacity of PDCCH.Particularly for some novel application scenarioss, such as, multiple remote radio (RRH, Remote Radio Head) share identical community ID, when namely multiple RRH is same community, the capacity constraint of traditional LTE system PDCCH, a large number of users cannot be supported, this data capacity larger with LTE system does not mate, and therefore, the capacity how increasing PDCCH becomes one of technical problem urgently to be resolved hurrily in prior art.
Summary of the invention
The embodiment of the present invention provides a kind of enhancement mode PDCCH implementation method and equipment, in order to increase the capacity of traditional LTE system PDCCH system.
The embodiment of the present invention provides a kind of enhancement mode PDCCH implementation method, comprising:
For each user terminal UE, determine the available orthogonal frequency division multiplex OFDM value of symbol into the enhancement mode Physical Downlink Control Channel E-PDCCH of this UE control channel and available frequency resources information; And
From the frequency resource that described available frequency resources information is corresponding, be defined as the frequency resource that described E-PDCCH distributes.
The embodiment of the present invention provides a kind of base station, comprising:
First determining unit, for for each user terminal UE, determines the available orthogonal frequency division multiplex OFDM value of symbol into the enhancement mode Physical Downlink Control Channel E-PDCCH of this UE control channel and available frequency resources information;
Second determining unit, for from frequency resource corresponding to described available frequency resources information, is defined as the frequency resource that described E-PDCCH distributes.
The enhancement mode PDCCH implementation method that the embodiment of the present invention provides and equipment, base station is for each UE, be defined as available OFDM symbol value and the usable frequency information of the E-PDCCH of this UE control channel, and from frequency resource corresponding to usable frequency information, be defined as the frequency resource that this E-PDCCH distributes, like this, base station can E-PDCCH can OFDM symbol corresponding to OFDM symbol value and the running time-frequency resource jointly determined of the frequency resource determined on transmit E-PDCCH to UE, thus add the capacity of traditional LTE system PDCCH.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Fig. 1 is in prior art, and in traditional LTE, PDCCH and data channel OFDM symbol take schematic diagram;
Fig. 2 a is in the embodiment of the present invention, a kind of possible E-PDCCH resource occupation schematic diagram;
Fig. 2 b is in the embodiment of the present invention, the E-PDCCH resource occupation schematic diagram of another possibility;
Fig. 3 is in the embodiment of the present invention, the implementing procedure schematic diagram of enhancement mode PDCCH implementation method base station side;
Fig. 4 is in the embodiment of the present invention, PDCCH and E-PDCCH can OFDM conflict time resource occupation schematic diagram;
Fig. 5 is in the embodiment of the present invention, and base station is defined as the implementing procedure schematic diagram of the frequency resource that this UE distributes;
Fig. 6 is in the embodiment of the present invention, the implementing procedure schematic diagram of enhancement mode PDCCH implementation method UE side;
Fig. 7 is in the embodiment of the present invention, the structural representation of base station;
Fig. 8 is in the embodiment of the present invention, the structural representation of mobile terminal.
Embodiment
In order to increase the capacity of traditional LTE system PDCCH system, in the embodiment of the present invention, provide a kind of enhancement mode PDCCH implementation method and equipment.
Below in conjunction with Figure of description, the preferred embodiments of the present invention are described, be to be understood that, preferred embodiment described herein is only for instruction and explanation of the present invention, be not intended to limit the present invention, and when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
A kind of enhancement mode PDCCH (E-PDCCH) is provided in the embodiment of the present invention, its basic thought be E-PDCCH the information of control channel is placed on LTE R8/R9/R10 system Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel) on transmit.As shown in Figure 2 a, be a kind of possible E-PDCCH resource occupation schematic diagram, wherein, abscissa represents OFDM symbol value, ordinate represents frequency domain resource, and in Fig. 2 a, E-PDCCH takies the component frequency resource in (k+3) ~ (k+13) individual OFDM symbol; As shown in Figure 2 b, for the E-PDCCH resource occupation schematic diagram of another possibility, wherein, abscissa represents OFDM symbol value, ordinate represents frequency domain resource, and in Fig. 2 b, E-PDCCH takies the component frequency resource in (k+3) ~ (k+13) individual OFDM symbol, wherein, the zones of different that dash area divides represents the E-PDCCH of different UEs respectively.
Based on above-mentioned design philosophy, the embodiment of the present invention provides a kind of enhancement mode PDCCH implementation method and equipment, in order to increase the capacity of traditional LTE system PDCCH.
As shown in Figure 3, be the implementing procedure schematic diagram of the PDCCH base station side implementation method that the embodiment of the present invention provides, comprise the following steps:
S301, for each UE, determine the available OFDM symbol value into the enhancement mode Physical Downlink Control Channel E-PDCCH of this UE control channel and available frequency resources information;
S302, from frequency resource corresponding to this available frequency resources information, be defined as the frequency resource that this E-PDCCH distributes.
In concrete enforcement, by said process, the time-frequency location that the E-PDCCH into each UE distributes just can be determined in base station, and after the time-frequency location determined, can also comprise the following steps:
Send Resourse Distribute indication information to UE, in this Resourse Distribute indication information, comprise available OFDM symbol value and the available frequency resources information of E-PDCCH;
Instruction UE carries out E-PDCCH detection in the available OFDM symbol value of E-PDCCH and running time-frequency resource corresponding to available frequency resources information.
Concrete, the Resourse Distribute indication information that base station is sending to this mobile terminal can comprise two-part content, part content is used to indicate the available OFDM symbol value of the E-PDCCH of UE, namely the E-PDCCH of this UE may take those OFDM symbol in a TTI, for convenience of description, below OFDM symbol corresponding for the available OFDM symbol value of the E-PDCCH of UE is designated as Oset; Part content is used to indicate the available frequency resources of the E-PDCCH of UE, the i.e. E-PDCCH of this UE carrier wave/carrier wave set/PRB (Physical Resource Block) etc. that may take, wherein, a PRB can be divided into multiple carrier wave set, for convenience of description, below frequency resource corresponding for the available frequency resources information of the E-PDCCH of UE is designated as Fset, and is described for carrier wave below.As in Fig. 2 a, Oset={ (k+3), (k+4) ... (k+13) }, Fset={ carrier wave f
8, carrier wave f
15, carrier wave f
16, carrier wave f
17.
In concrete enforcement, because base station indicates UE by PCFICH, the OFDM symbol that the PDCCH of this UE may take and frequency resource, as shown in Figure 4, the OFDM symbol value that the PDCCH of UE may take is k, k+1, k+2, and the frequency resource that may take is carrier wave f
1~ carrier wave f
17, and the OFDM symbol value that the E-PDCCH of UE may take is k+2, k+3, k+4 ..., the frequency resource that the E-PDCCH of k+13, UE may take is carrier wave f
15~ carrier wave f
17, as can be seen here, there is with the OFDM symbol that the E-PDCCH of UE may take conflict in the OFDM symbol that the PDCCH of UE may take.At this moment, in the embodiment of the present invention, can solve in the following manner:
Mode one
Base station, by the mode of scheduling, ensures that the OFDM symbol that PDCCH and E-PDCCH of all UE may take does not exist conflict.This is because, the subframe that PDCCH can take is the variable (running time-frequency resource that subframe and each OFDM symbol and each carrier wave are determined, can be understood as each grid in Fig. 4), so base station is when determining PDCCH and E-PDCCH of each UE, it is all different with the carrier wave taken that its ODFM value of symbol can be set, thus makes the two not conflict.
Based on above-mentioned analysis, preferably, the enhancement mode PDCCH implementation method that the embodiment of the present invention provides, can also comprise the following steps:
Before sending Resourse Distribute indication information to UE, determine the available OFDM symbol of E-PDCCH and PDCCH and there is not conflict for the frequency resource of E-PDCCH and PDCCH distribution.
Mode two
When base station determines that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, E-PDCCH is transmitted in base station in the OFDM symbol that may do not taken by PDCCH, such as, the scene clashed in Fig. 4, base station is the carrier wave f in the OFDM symbol of (k+3) ~ (k+13) at value of symbol
15~ carrier wave f
17transmission E-PDCCH, meanwhile, instruction UE only need carrier wave f in the OFDM symbol that value of symbol is (k+3) ~ (k+13)
15~ carrier wave f
17on carry out E-PDCCH detection.
Based on above-mentioned analysis, preferably, the enhancement mode PDCCH implementation method that the embodiment of the present invention provides, can also comprise the following steps:
When determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, in the available OFDM symbol of E-PDCCH, the OFDM symbol beyond the available OFDM symbol of PDCCH is selected to transmit E-PDCCH.Even the available OFDM symbol set of PDCCH is A, the available OFDM symbol set of E-PDCCH is B, the common factor of A and B is C, set C is the conflict part of the available OFDM symbol of E-PDCCH and PDCCH, in the embodiment of the present invention, in set (B-C), select OFDM symbol transmission E-PDCCH.
Mode three
When base station determines that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, E-PDCCH is not transmitted to UE in base station.
Based on this, the enhancement mode PDCCH implementation method that the embodiment of the present invention provides, can also comprise the following steps:
When determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, do not transmit E-PDCCH.
Especially, in concrete enforcement, if when determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, conflict can not also be considered, the available OFDM symbol of E-PDCCH transmits E-PDCCH.Even the available OFDM symbol set of PDCCH is A, the available OFDM symbol set of E-PDCCH is the common factor of B, A and B is C, and set C is the conflict part of the available OFDM symbol of E-PDCCH and PDCCH, in the embodiment of the present invention, in set B, OFDM symbol is selected to transmit E-PDCCH.
In the embodiment of the present invention, in step S302, the frequency resource of E-PDCCH distribution can be defined as according to following process.As shown in Figure 5, for each UE, base station is defined as the implementing procedure schematic diagram of the frequency resource that this UE distributes, and comprises the following steps:
S501, by frequency resource corresponding for available frequency resources information, be divided into multiple frequency resource groups according to preset rules;
S502, according to system message, and/or UE feedback CQI (channel quality instruction) information, from the frequency resource groups marked off selection a frequency resource groups;
In concrete enforcement, base station can according to the CQI information of UE feedback or system information, a frequency resource groups can also be selected from the frequency resource groups marked off in conjunction with the CQI information of UE feedback and system information, wherein, system information can be the schedule information of base station, and other UE takies situation etc. to frequency resource.
S503, the frequency resource frequency resource that the frequency resource groups selected comprises being defined as into E-PDCCH distributes.
Concrete, in Fset, the base unit of frequency resource can be carrier wave, can be carrier wave set, can also be PRB etc.In this example for the base unit of frequency resource for carrier wave is described.To comprise carrier wave f in Fset
1, f
2, f
3, f
4, f
5..., f
18, from Fset, select the frequency resource subclass of the E-PDCCH of K carrier wave composition, be designated as S_K_1, K is called the degree of polymerization of frequency resource, for K=3, from f
1start, select 3 carrier waves as carrier frequency subclass, i.e. a S_3_1={f successively
1, f
2, f
3, adopt similar method, the carrier wave comprised in Fset is divided, remaining carrier frequency subclass can be obtained, be respectively S_3_2={f
4, f
5, f
6, S_3_3={f
7, f
8, f
9, S_3_4={f
10, f
11, f
12, S_3_5={f
13, f
14, f
15, S_3_6={f
16, f
17, f
18.With Lset_K_M represent UE can frequency resource groups, wherein K is the degree of polymerization of frequency resource, and M is the quantity of the subset sums that frequency resource groups comprises, and base station can to K, M is configured, then Lset_3_6={S_3_1, S_3_2, S_3_3, S_3_4, S_3_5, S_3_6}.For each UE, base station is when determining the carrier wave that the E-PDCCH of this UE distributes, and the information such as the CQI that can feed back according to this UE, from Lset_3_6, selection frequency resource subset is incompatible transmits.Such as, S_3_1 is selected, namely at carrier wave f
1, f
2, f
3e-PDCCH is transmitted to this UE.
So far, it can be the frequency resource of UE transmission E-PDCCH that base station determines, and can transmit the available OFDM symbol value of E-PDCCH, just can determine the running time-frequency resource that can transmit E-PDCCH to UE in conjunction with base station to UE.
During concrete enforcement, for each UE, the control signal that transmits for this UE after process, can transmit control signal according to following principle by base station on the running time-frequency resource determined:
In step 1, first OFDM symbol in Oset (according to time order and function sequence), distribute control signal successively at the frequency domain position determined;
Such as, in (k+2) individual OFDM symbol in the diagram, at carrier wave f
1, f
2, f
3on distribute control signal successively.
In step 2, second OFDM symbol in Oset (according to time order and function sequence), distribute remaining control signal successively at the frequency domain position determined;
Namely in (k+3) individual OFDM symbol in the diagram, at carrier wave f
1, f
2, f
3on distribute control signal successively.
According to the method described above, successively in each available OFDM symbol, remaining control signal is distributed successively at the frequency domain position determined, until be assigned.
Based on this, the enhancement mode PDCCH implementation method that the embodiment of the present invention provides, can also comprise step:
An OFDM symbol is selected successively according to time sequencing;
In the OFDM symbol selected, control signal is distributed in position corresponding to the frequency resource comprised at the frequency resource groups selected.
Especially, in above process, if some resource particle (RE, Resource Element) position needs to send reference signal (RS, Refrence Signal), then control signal is not distributed in this RE position.
Based on same inventive concept, another base station is also provided in the embodiment of the present invention, the principle of dealing with problems due to this base station is similar to above-mentioned enhancement mode PDCCH implementation method, and therefore the enforcement of this base station see the enforcement of above-mentioned enhancement mode PDCCH implementation method, can repeat part and repeat no more.
As shown in Figure 6, be the implementing procedure schematic diagram of the enhancement mode PDCCH implementation method UE side that the embodiment of the present invention provides, comprise the following steps:
S601, UE receive the Resourse Distribute indication information that base station sends, and comprise the OFDM symbol value for the E-PDCCH of control channel and frequency resource information in this Resourse Distribute indication information;
S602, UE carry out E-PDCCH detection in the available OFDM symbol value of E-PDCCH and running time-frequency resource corresponding to frequency resource information.
Preferably, UE, before the available OFDM symbol value of E-PDCCH and position probing E-PDCCH corresponding to frequency resource information, can also comprise the following steps:
UE determines that the available OFDM symbol value of E-PDCCH and PDCCH does not exist conflict.
Preferably, when UE determines that the available OFDM symbol value of E-PDCCH and PDCCH exists conflict, can process in such a way:
Processing mode one
If UE determines that the available OFDM symbol of the PDCCH that the available OFDM symbol of the E-PDCCH indicated in Resourse Distribute indication information indicates with PCFICH exists when conflicting, then think detection mistake, do not carry out E-PDCCH detection.
Based on this, the implementing procedure of enhancement mode PDCCH implementation method UE side, can also comprise the following steps: when UE really states the available OFDM symbol existence conflict of E-PDCCH and PDCCH, do not carry out E-PDCCH detection.
Processing mode two
If UE determines that the available OFDM symbol of the PDCCH that the available OFDM symbol of the E-PDCCH indicated in Resourse Distribute indication information indicates with PCFICH exists when conflicting, according to available OFDM symbol and the frequency resource information of the E-PDCCH indicated in Resourse Distribute indication information, the time-frequency location of correspondence carries out E-PDCCH detection.
Based on this, the implementing procedure of enhancement mode PDCCH implementation method UE side, can also comprise the following steps: when UE determines that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, according to Resourse Distribute indication information, carry out E-PDCCH detection.
As shown in Figure 7, be the structural representation of the base station that the embodiment of the present invention provides, comprise:
First determining unit 701, for for each user terminal UE, determines the available OFDM symbol value into the E-PDCCH of this UE control channel and available frequency resources information;
Second determining unit, for from frequency resource corresponding to available frequency resources information, is defined as the frequency resource that this E-PDCCH distributes.
Preferably, the second determining unit 702, can comprise:
Divide subelement, for by frequency resource corresponding for available frequency resources information, be divided into multiple frequency resource groups according to preset rules;
Chooser unit, for according to system information, and/or the channel quality indicator CQI information of UE feedback, from frequency resource groups, select a frequency resource groups;
Determine subelement, the frequency resource that the frequency resource groups for being gone out by chooser Unit selection comprises is defined as the frequency resource into E-PDCCH distributes.
In concrete enforcement, the base station that the embodiment of the present invention provides, can also comprise:
Selected cell, for selecting an OFDM symbol successively according to time sequencing;
Allocation units, for the OFDM symbol selected, control signal is distributed in position corresponding to the frequency resource comprised at the frequency resource groups selected.
In concrete enforcement, the base station that the embodiment of the present invention provides, can also comprise:
Transmitting element, for sending Resourse Distribute indication information to UE, comprises available OFDM symbol value and the available frequency resources information of described E-PDCCH in this Resourse Distribute indication information;
Indicating member, is used to indicate UE and carries out E-PDCCH detection in the available OFDM symbol value of E-PDCCH and running time-frequency resource corresponding to available frequency resources information.
In concrete enforcement, the base station that the embodiment of the present invention provides, can also comprise:
3rd determining unit, for before sending Resourse Distribute indication information to UE, determines the available OFDM symbol of E-PDCCH and PDCCH and there is not conflict for the frequency resource of this E-PDCCH and PDCCH distribution.
In concrete enforcement, the base station that the embodiment of the present invention provides, can also comprise:
Processing unit, during for determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, in the available OFDM symbol of E-PDCCH, selects the OFDM symbol beyond the available OFDM symbol of PDCCH to transmit E-PDCCH; Or during for determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, do not transmit E-PDCCH; When determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, the available OFDM symbol of described E-PDCCH transmits E-PDCCH.
As shown in Figure 8, be the structural representation of the mobile terminal that the embodiment of the present invention provides, comprise:
Receiving element 801, for receiving the Resourse Distribute indication information that base station sends, comprises the OFDM symbol value for the E-PDCCH of control channel and available frequency resources information in this Resourse Distribute indication information;
Detecting unit 802, for carrying out E-PDCCH detection in the available OFDM symbol value of E-PDCCH and running time-frequency resource corresponding to available frequency resources information.
In concrete enforcement, the mobile terminal that the embodiment of the present invention provides, can also comprise:
Determining unit, before carrying out E-PDCCH detection in the available OFDM symbol value of E-PDCCH and running time-frequency resource corresponding to available frequency resources information, determines that the available OFDM symbol of E-PDCCH and PDCCH does not exist conflict.
In concrete enforcement, the mobile terminal that the embodiment of the present invention provides, can also comprise:
Processing unit, for when determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, does not carry out E-PDCCH detection; Or for when determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, according to Resourse Distribute indication information, carry out E-PDCCH detection.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
The enhancement mode PDCCH implementation method that the embodiment of the present invention provides and equipment, base station is for each UE, be defined as available OFDM symbol value and the usable frequency information of the E-PDCCH of this UE control channel, and from frequency resource corresponding to usable frequency information, be defined as the frequency resource that this E-PDCCH distributes, like this, base station can E-PDCCH can OFDM symbol corresponding to OFDM symbol value and the running time-frequency resource jointly determined of the frequency resource determined on transmit E-PDCCH to UE, thus add the capacity of traditional LTE system PDCCH.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. an enhancement mode PDCCH implementation method, is characterized in that, comprising:
For each user terminal UE, determine the available orthogonal frequency division multiplex OFDM value of symbol into the enhancement mode Physical Downlink Control Channel E-PDCCH of this UE control channel and available frequency resources information; And
From the frequency resource that described available frequency resources information is corresponding, be defined as the frequency resource that described E-PDCCH distributes, before the frequency resource being defined as described E-PDCCH distribution, when determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, in the available OFDM symbol of described E-PDCCH, the OFDM symbol beyond the available OFDM symbol of PDCCH is selected to transmit E-PDCCH; Or before the frequency resource being defined as described E-PDCCH distribution, when determining that the available OFDM symbol of E-PDCCH and PDCCH exists conflict, do not transmit E-PDCCH.
2. the method for claim 1, is characterized in that, also comprises:
Before being defined as the frequency resource that described E-PDCCH distributes, the available OFDM symbol determining described E-PDCCH and physical downlink control channel PDCCH and the frequency resource of distributing for described E-PDCCH and PDCCH do not exist conflicts.
3. the method for claim 1, is characterized in that, from the frequency resource that described available frequency resources information is corresponding, is defined as the frequency resource that described E-PDCCH distributes, specifically comprises:
By frequency resource corresponding for described available frequency resources information, be divided into multiple frequency resource groups according to preset rules;
According to system information, and/or the channel quality indicator CQI information that described UE feeds back, from the frequency resource groups marked off, select a frequency resource groups;
The frequency resource that the frequency resource groups selected comprises is defined as the frequency resource for described E-PDCCH distributes.
4. method as claimed in claim 3, is characterized in that, also comprise:
An OFDM symbol is selected successively according to time sequencing;
In the OFDM symbol selected, described control signal is distributed in the position corresponding in the frequency resource of distributing for described E-PDCCH.
5. the method as described in claim as arbitrary in Claims 1 to 4, is characterized in that, also comprise:
Send Resourse Distribute indication information to described UE, in described Resourse Distribute indication information, comprise available OFDM symbol value and the available frequency resources information of described E-PDCCH;
Described UE is indicated to carry out E-PDCCH detection in the available OFDM symbol value of E-PDCCH and running time-frequency resource corresponding to available frequency resources information.
6. a base station, is characterized in that, comprising:
First determining unit, for for each user terminal UE, determines the available orthogonal frequency division multiplex OFDM value of symbol into the enhancement mode Physical Downlink Control Channel E-PDCCH of this UE control channel and available frequency resources information;
Second determining unit, for from frequency resource corresponding to described available frequency resources information, is defined as the frequency resource that described E-PDCCH distributes;
Processing unit, for before the frequency resource being defined as described E-PDCCH distribution, when determining that the available OFDM symbol value of E-PDCCH and PDCCH exists conflict, in the available OFDM symbol of described E-PDCCH, the OFDM symbol beyond the available OFDM symbol of PDCCH is selected to transmit E-PDCCH; Or when determining that the available OFDM symbol value of E-PDCCH and PDCCH exists conflict, do not transmit E-PDCCH.
7. base station as claimed in claim 6, is characterized in that, also comprise:
3rd determining unit, for before being defined as the frequency resource that described E-PDCCH distributes, the available OFDM symbol determining described E-PDCCH and physical downlink control channel PDCCH and the frequency resource of distributing for described E-PDCCH and PDCCH do not exist conflicts.
8. base station as claimed in claim 6, it is characterized in that, described second determining unit, comprising:
Divide subelement, for by frequency resource corresponding for described available frequency resources information, be divided into multiple frequency resource groups according to preset rules;
Chooser unit, for according to system information, and/or the channel quality indicator CQI information that described UE feeds back, from the frequency resource groups marked off, select a frequency resource groups;
Determine subelement, the frequency resource for being comprised by the frequency resource groups selected is defined as the frequency resource for described E-PDCCH distributes.
9. base station as claimed in claim 8, is characterized in that, also comprise:
Selected cell, for selecting an OFDM symbol successively according to time sequencing;
Allocation units, for the OFDM symbol selected, described control signal is distributed in the position corresponding in the frequency resource of distributing for described E-PDCCH.
10. the base station as described in claim as arbitrary in claim 6 ~ 9, is characterized in that, also comprise:
Transmitting element, for sending Resourse Distribute indication information to described UE, comprises available OFDM symbol value and the available frequency resources information of described E-PDCCH in described Resourse Distribute indication information;
Indicating member, is used to indicate described UE and carries out E-PDCCH detection in the available OFDM symbol value of E-PDCCH and running time-frequency resource corresponding to available frequency resources information.
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| US11006400B2 (en) * | 2015-01-16 | 2021-05-11 | Sharp Kabushiki Kaisha | User equipments, base stations and methods |
| CN108811052B (en) * | 2017-04-28 | 2021-05-14 | 电信科学技术研究院 | Downlink control channel detection receiving method, terminal and network side equipment |
| CN111510266B (en) * | 2019-01-31 | 2021-10-01 | 成都华为技术有限公司 | Signal sending method, signal receiving method and related equipment |
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| CN102170703A (en) * | 2011-05-11 | 2011-08-31 | 电信科学技术研究院 | Method for receiving and transmitting information on physical downlink control channel and equipment thereof |
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| CN102170703A (en) * | 2011-05-11 | 2011-08-31 | 电信科学技术研究院 | Method for receiving and transmitting information on physical downlink control channel and equipment thereof |
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| Title |
|---|
| Application scenario for introducing enhanced PDCCH in Rel-11;CMCC;《3GPP TSG-RAN WG1 #66》;20110826;全文 * |
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