CN103582135B - A kind of method for the eCCE for being configured to ePDCCH - Google Patents
A kind of method for the eCCE for being configured to ePDCCH Download PDFInfo
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- CN103582135B CN103582135B CN201210265061.1A CN201210265061A CN103582135B CN 103582135 B CN103582135 B CN 103582135B CN 201210265061 A CN201210265061 A CN 201210265061A CN 103582135 B CN103582135 B CN 103582135B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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Abstract
The present invention provides a kind of methods for the eCCE that ePDCCH is configured in the network entity of communication system.According to one embodiment of present invention, network entity can determine the quantity of the quantity of eCCE and the resource element shared by each eCCE according to the quantity of the available resource element of Physical Resource Block centering.In another embodiment of the present invention, network entity and then the quantity of the quantity of eREG that an eCCE occupies and the resource element shared by each eREG can be determined according to the quantity of the resource element shared by eCCE.By the preferred embodiment of the invention, some original configurations of previous PDCCH can be compatible with, while accelerate the process of standardization.
Description
Technical field
The present invention relates to communication systems, relate more specifically to, a kind of method for the eCCE for being configured to ePDCCH.
Background technology
For existing Physical Downlink Control Channel (PDCCH), each PDCCH uses one or more control channels
Element (Control Channel Element, CCE) is transmitted into row information, wherein each CCE corresponds to 9 groups, every group includes 4
The resource element groups (Resource Element Group, REG) of resource element (Resource Element, RE).
And currently in 3GPP Rel-11, considering enhancing Inter-Cell Interference Coordination (enhanced intercell
Interference coordination, eICIC), multipoint cooperative communication CoMP and downlink mimo when,
The design to enhancing Physical Downlink Control Channel (ePDCCH) is noted in series of fortified passes.Since ePDCCH is located in data field, so needing
The new rule different from PDCCH is formulated for ePDCCH, and needs to consider following main points herein：Enhancing control channel element/
Enhance resource element groups (enhanced Control Channel Element/enhanced Resource Element
Group, eCCE/eREG) definition, whether support the intertexture of eREG levels and the mapping ruler of resource element.Wherein, each
EPDCCH is transmitted by using eCCE.
And in RAN1 meetings #69bis, formulated with the resource element mapping ruler under classical signal crash scenario.
For example, the matching of chain encoding rate all can be used in base station and user equipment in the generation of one or more of following four situation
(coding chain rate-matching)：1. be provided with public reference signal (common reference signal,
CRS)；2. it is provided with for the new antenna port of new wave-carring type (New Carrier Type)；3. physical down control letter
The various situations (for example, occupying 1 symbol, 2 symbols, 3 symbols) for the OFDM symbol that road (PDCCH) occupies；4. it is provided with
PBCH (Physical Broadcast Channel) and PSS/SSS (primary synchronization signal/secondary synchronization signal).In addition, it also formulates in the meeting
According to specific situation, zero energy channel status reference signal (CSI-RS) and non-zero power CSI-RS are set for user equipment.
However, so far, the not specific design to the eCCE that is used for ePDCCH and configuration carried out discussion, such as
The quantity of the eCCE of one Physical Resource Block centering, the resource element quantity that each eCCE is included, if support flexibility and changeability
The quantity for the resource element that the eCCE/eREG of quantity, the quantity for the eREG that each eCCE is included and each eREG are occupied.
The content of the invention
As it can be seen that according to background technology, lack the research to eCCE concrete configurations at present.
Therefore, in the presence of background technology the problem of, according to the first aspect of the invention, it is proposed that one kind is communicating
The method of the eCCE of ePDCCH is configured in the network entity of system, wherein, it the described method comprises the following steps：A. object is determined
Manage resource block pair eCCE quantity and each eCCE shared by resource element quantity.
A preferred embodiment according to the present invention, step a further comprise：A11. the Physical Resource Block centering is determined
The quantity of available resource element；And the quantity of the eCCE of the Physical Resource Block centering is determined as 4 by a12., and based on institute
The quantity of the eCCE of definite Physical Resource Block centering determines the quantity of the resource element shared by average each eCCE；And
A13. when the quantity of the resource element shared by average each eCCE is integer, by the money shared by average each eCCE
The quantity of source element is determined as the quantity of the resource element shared by each eCCE, when the resource element shared by average each eCCE
When the quantity of element is non-integer, step a13-1 or a13-2 are performed：A13-1. the network entity includes base station and user equipment,
And when the base station and the user equipment share the first pre-defined rule, the base station and the user equipment are based on described
First pre-defined rule determines the quantity of the resource element shared by each eCCE；A13-2. the network entity includes base station and use
Family equipment, and when the first pre-defined rule is not shared in the base station with the user equipment, the base station is based on described first
Pre-defined rule sends the first information, institute to determine the quantity of the resource element shared by each eCCE to the user equipment
State the quantity for the resource element that the first information is indicated shared by eCCE and the eCCE shared by the user equipment, and the user
Equipment receives the first information from the base station, and determines eCCE shared by it and should based on the first information
The quantity of resource element shared by eCCE.
Above embodiment described a kind of methods of the quantity of the eCCE of fixed configurations Physical Resource Block centering, thus simplify
Implementation process.
A preferred embodiment according to the present invention, step a further comprise that a21. determines the Physical Resource Block pair
In available resource element quantity；A22. when the quantity of the available resource element is greater than or equal to first threshold, really
The eCCE of fixed first quantity, and based on the eCCE of first quantity come the number of the resource element shared by definite average each eCCE
Amount when the quantity of the available resource element is less than the first threshold, determines the eCCE of the second quantity, and based on described
The eCCE of second quantity determines the quantity of the resource element shared by average each eCCE；And a23. is when described average each
When the quantity of resource element shared by eCCE is integer, the quantity of the resource element shared by average each eCCE is determined as
The quantity of resource element shared by each eCCE；When the quantity of the resource element shared by average each eCCE is non-integer
When, perform step a23-1 or a23-2：A23-1. the network entity include base station and user equipment, and when the base station with
When the user equipment shares the second pre-defined rule, the base station and the user equipment are based on second pre-defined rule come really
The quantity of resource element shared by fixed each eCCE；A23-2. the network entity includes base station and user equipment, and works as institute
When stating base station and not sharing the second pre-defined rule with the user equipment, the base station is determined every based on second pre-defined rule
The quantity of resource element shared by a eCCE, and the second information is sent to the user equipment, second information indicates institute
The quantity of the resource element shared by the eCCE and the eCCE shared by user equipment is stated, and the user equipment is received from described
Second information of base station, and the resource element shared by the eCCE and the eCCE shared by it is determined based on second information
Quantity.
Above embodiment described a kind of method of the quantity of the eCCE of flexible configuration Physical Resource Block centering, it is possible thereby to
According to the quantity of the available resource element of current physical block centering usually flexible configuration eCCE, therefore optimize implementation process.
A preferred embodiment according to the present invention, first pre-defined rule and/or the second pre-defined rule bag
Include the difference between the quantity for minimizing the resource element shared by each eCCE.If due to having in one piece of continuous resource
Two or more eCCE, then its it is close to experience the attenuation of channel.It therefore can be in the resource element shared by averagely each eCCE
Quantity when being non-integer, the difference between the quantity of the resource element shared by each eCCE to be minimized for each eCCE point
With resource element.Can be an eCCE for example, when can use in 63 resource elements and there are two have in the case of eCCE
31 resource elements are distributed, another eCCE distributes 32 resource elements.Although second eCCE overabsorption, one resource element
Element, but in systems in practice coding be it is very flexible, base station can for example by encrypting code check, allotment power adjustment (such as
Allocate the power of the last one resource element) handle the above situation.
A preferred embodiment according to the present invention, the eCCE of first quantity is 4, the eCCE of second quantity
For 2.The quantity of eCCE is configured by doing so, and the quantity of the eCCE of Physical Resource Block centering can be caused to polymerize with currently used
Horizontal { 1,2,3,4 } (aggregation level) matches, and has thus been convenient for realizing the blind decoding of ePDCCH.
A preferred embodiment according to the present invention, the first threshold are 72.A here, Physical Resource Block centering
With 168 resource elements, and be to the demodulation of ePDCCH based on distributing to Downlink Control Information transmission Physical Resource Block
The demodulated reference signal DM-RS (Demodulation Reference Signal) of interior transmission, DM-RS needs occupancy 24 at present
A resource element, therefore there remains 144 resource elements in Physical Resource Block pair, i.e. Physical Resource Block centering is up to 144
Resource element can use.As it can be seen that 72 be a median.On the other hand, due in CCE used in existing PDCCH, each
CCE has 36 resource elements.So choosing 72 is equivalent to the amount having chosen with the comparable resource elements of original 2 CCE.By
This, has been convenient for improving the compatibility with original configuration.
A preferred embodiment according to the present invention, the method further include step b：B. determine what an eCCE occupied
The quantity of the quantity of eREG and the resource element shared by each eREG.
A preferred embodiment according to the present invention, the step b further comprise：B11. an eCCE is occupied
The quantity of eREG is determined as 4, and determines the quantity of the resource element shared by average each eREG；And b12. is when described average
It is when the quantity of resource element shared by each eREG is integer, the quantity of the resource element shared by average each eREG is true
It is set to the quantity of the resource element shared by each eREG, when the quantity of the resource element shared by average each eREG is non-whole
During number, step b12-1 or b12-2 are performed：B12-1. the network entity includes base station and user equipment, and when the base station
When sharing three pre-defined rules with the user equipment, the base station and the user equipment based on the 3rd pre-defined rule come
Determine the quantity of the resource element shared by each eREG；B12-2. the network entity includes base station and user equipment, and works as
When three pre-defined rules is not shared in the base station with the user equipment, the base station is determined based on the 3rd pre-defined rule
The quantity of resource element shared by each eREG, and send the 3rd information, the 3rd information instruction to the user equipment
The quantity of the resource element shared by each eREG shared by the user equipment, and the user equipment is received from the base
The 3rd information stood, and the number of the resource element shared by each eREG shared by it is determined based on the 3rd information
Amount.
Above embodiment described a kind of sides of the quantity of eCCE of fixed configurations Physical Resource Block centering eREG occupied
Method thereby simplifies implementation process.
A preferred embodiment according to the present invention, the step b further comprise：B21. when identified eCCE institutes
When the quantity of the resource element accounted for is greater than or equal to second threshold, determine that an eCCE occupies the eREG of the 3rd quantity, and really
The quantity of the resource element shared by each eREG is allocated, when the quantity of the resource element shared by identified eCCE is less than described
During second threshold, determine that an eCCE occupies the eREG of the 4th quantity, and determine the resource element shared by average each eREG
Quantity；And b22. described will be averaged each when the quantity of the resource element shared by each eREG that is averaged is integer
The quantity of resource element shared by eREG is determined as the quantity of the resource element shared by each eREG, as average each eREG
When the quantity of shared resource element is non-integer, step b22-1 or b22-2 are performed：B22-1. the network entity includes base
It stands and user equipment, and when the base station and the user equipment share four pre-defined rules, the base station and the use
Family equipment determines the quantity of the resource element shared by each eREG based on the 4th pre-defined rule；B22-2. the network is real
Body includes base station and user equipment, and when four pre-defined rules is not shared in the base station with the user equipment, the base
It stands based on the 4th pre-defined rule to determine the quantity of the resource element shared by each eREG, and is sent out to the user equipment
The 4th information is sent, the 4th information indicates the quantity of the resource element shared by each eREG shared by the user equipment, and
And the user equipment receives the 4th information from the base station, and determined based on the 4th information shared by it
The quantity of resource element shared by each eREG.
Above embodiment described a kind of sides of the quantity of eCCE of flexible configuration Physical Resource Block centering eREG occupied
Method, it is possible thereby to according to the available resource element of current physical block centering, and then the money according to shared by averagely each eCCE
The quantity of source element carrys out the quantity of flexible configuration eREG, therefore optimizes implementation process.
A preferred embodiment according to the present invention, the 3rd pre-defined rule and/or the 4th pre-defined rule bag
Include the difference between the quantity for minimizing the resource element shared by each eREG.
A preferred embodiment according to the present invention, the eREG of the 3rd quantity is 4, the eREG of the 4th quantity
For 2.
A preferred embodiment according to the present invention, the second threshold are 16.
By the preferred embodiment of the invention, some original configurations of previous PDCCH can be compatible with, while accelerate standard
The process of change.
Description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, of the invention is other
Feature, objects and advantages will become more apparent：
Fig. 1 shows the flow chart of method according to an embodiment of the invention；
Fig. 2 shows the flow chart of the method for the step S1 in implementation Fig. 1 according to an embodiment of the invention；
Fig. 3 shows the flow chart of the method for implementing the step S1 in Fig. 1 according to another embodiment of the invention；
Fig. 4 shows the flow chart of the method for the step S2 in implementation Fig. 1 according to an embodiment of the invention；And
Fig. 5 shows the flow chart of the method for implementing the step S2 in Fig. 1 according to another embodiment of the invention.
In the figure through different diagrams, same or similar reference numeral represents identical or corresponding component or spy
Sign.
Specific embodiment
Fig. 1 shows the flow chart of method according to an embodiment of the invention.As described in Figure 1, it is according to the present invention
Method is made of substantially 2 parts, i.e. step S1 determine the eCCE of Physical Resource Block centering quantity and each eCCE shared by money
The quantity and step S2 of source element determine the eREG that an eCCE occupies quantity and each eREG shared by resource element number
Amount.By network entity implementation steps S1 and S2.In the description of the invention, network entity includes base station and user equipment.
Fig. 2 shows the flow chart of the method for the step S1 in implementation Fig. 1 according to an embodiment of the invention.Scheming
It is fixed in a Physical Resource Block pair to choose 4 eCCE in embodiment described in 2.
Specifically, in step S101, network entity determines the quantity of the available resource element of Physical Resource Block centering.One
A Physical Resource Block centering has 168 resource elements, and is to be based on distributing to Downlink Control Information to the demodulation of ePDCCH
The demodulated reference signal DM-RS (Demodulation Reference Signal) of transmission in the Physical Resource Block of transmission, at present
DM-RS needs to occupy 24 resource elements, therefore there remains 144 resource elements in Physical Resource Block pair.Therefore, network entity
It needs to be determined that in 144 resource elements available resource element quantity.
When network entity is base station, resource element of the meeting for example according to shared by other signals of Physical Resource Block centering
Element determines an available resource element of Physical Resource Block centering.Specifically, such as it can be occupied according to PDCCH
Whether the symbolic number of OFDM, the antenna port number of CRS, Physical Resource Block centering there are the conditions such as CSI-RS to determine a physics money
The available resource element of source block centering.Preferably, base station can also judge whether transmit PBCH, PSS/ in soon in physical resource
SSS determines an available resource element of Physical Resource Block centering.Those skilled in the art, it should be understood that in this base station
An available resource element of Physical Resource Block centering can be determined with reference to one or more condition described herein or not described
Element.
When network entity is user equipment, due to user equipment also will appreciate that PDCCH, CRS, PSS, SSS, PBCH,
The presence or absence of CSI-RS and/or its configuration, so user equipment also will impliedly predict the quantity of available resource element.
Then, network entity is average to determine by the quantity of available resource element divided by the quantity of eCCE (being herein 4)
The quantity of resource element shared by each eCCE.Such as when there is 144 resource elements can use, then shared by average each eCCE
The quantity of resource element is 36, when there is 72 resource elements can use, then the quantity for the resource element being averaged shared by each eCCE
For 18, when there is 106 resource elements can use, then the quantity of the resource element shared by average each eCCE is 26.5.
When the quantity of the resource element shared by averagely each eCCE is integer, method enters step S203.In step
In S203, the quantity of the resource element shared by averagely each eCCE is determined as the resource element shared by each eCCE by network entity
Quantity.Such case can be used for 144 resource elements, the quantity of the resource element shared by 4 eCCE is all determined as
36、36、36、36。
When the resource element shared by averagely each eCCE quantity be non-integer when, it is necessary to judge that base station is with user equipment
No share has the first pre-defined rule.When base station and user equipment, which are shared, the first pre-defined rule, method enters step S204.It is no
Then enter step S205.
Specifically, such as 106 resource elements can use, the quantity of the resource element shared by average each eCCE is
26.5 such cases, if base station and user equipment are shared in advance to have (predefined to have) by the quantity of the resource element of 4 eCCE
26,26,27,27 this rule are respectively set to, then base station and user equipment can carry out really according to the pre-defined rule respectively
The quantity of each shared resource element in fixed 4 eCCE.Here, the pre-defined rule is preferably to minimize each eCCE institutes
Difference between the quantity of the resource element accounted for.Certainly, other applicable rules are also not excluded for herein.Such as base station and user
The pre-defined rule that equipment is shared can also be 28,28,25,25.
And when base station and user equipment are not shared and have above-mentioned rule, then base station is determined each based on the pre-defined rule
The quantity of resource element shared by eCCE determines 26,26,27,27, and sends the first information to user equipment, this first
(information for example can be by public for the quantity of the resource element shared by eCCE and the eCCE shared by information instruction user equipment
The control information of search space (Common Searching Space, CSS) realizes or by high-level signaling, such as wirelessly
Resource control signaling (Radio Resource Control, RRC) is sent).Then, user equipment based on the first information come really
Determine the quantity of the resource element shared by the eCCE and the eCCE shared by it.
In the embodiment of another variation, when base station determines each eCCE institutes to be different from the rule of the first pre-defined rule
During the quantity of the resource element accounted for, such as in the above example, the quantity of the resource element of 4 eCCE is respectively set to 28,
26th, 25,27 or 30,22,27,27 etc. whens, base station can also tell above-mentioned configuration to user equipment by the first information, in order to
User equipment carries out subsequent operation.
In the embodiment of another variation, if 4 eCCE correspond to such as 2 user equipmenies, preferably, base respectively
Needs of standing to two user equipmenies send information respectively, to tell eCCE of two user equipmenies corresponding to it and corresponding
The quantity of resource element in eCCE, so as to avoid the unnecessary excessive blind decoding of user equipment.
Therefore, by step S205, user equipment it is shared have pre-defined rule in the case of, can be received from base station
The first information, and determine therefrom that out the quantity of the eCCE shared by it and the resource element shared by eCCE.Certainly, it is even if more existing
In the case of a user equipment, user equipment can also know the eCCE shared by other user equipmenies by suitable signaling
With the quantity of the resource element shared by eCCE.
In conclusion in step shown in Fig. 2, base station and user equipment (network entity) can separately be implemented
Step S201, S202, S203 and S204.Only in step S205, it is necessary to base station send additional message come with user equipment into
Row interaction, so as to come complete to be used for ePDCCH eCCE configure.
Fig. 3 shows the flow chart of the method for implementing the step S 1 in Fig. 1 according to another embodiment of the invention.
Embodiment shown in Fig. 3 describes a kind of method of the quantity of the eCCE of flexible configuration Physical Resource Block centering, it is possible thereby to root
According to the quantity of the available resource element of current physical block centering usually flexible configuration eCCE, therefore optimize implementation process.
Specifically, step S301 is similar to the step S201 in Fig. 2, and network entity determines that Physical Resource Block centering is available
The quantity of resource element.Its determination process and the process in step S201 are similar, and this will not be detailed here.
In step s 302, when the quantity of available resource element is greater than or equal to first threshold, network entity determines
The eCCE of first quantity, and the quantity of the resource element shared by average each eCCE is determined based on the eCCE of the first quantity, when
When the quantity of available resource element is less than first threshold, network entity determines the eCCE of the second quantity, and based on the second quantity
ECCE determine the quantity of the resource element shared by average each eCCE.
Specifically, herein for illustration purposes, the eCCE of the first quantity is arranged to 2, the eCCE of the second quantity is arranged to
4, first threshold is arranged to 72.It is pointed out that those numerical value are only that preferably (its advantage is explained above
State, this will not be detailed here), and not limit, the quantity of the other threshold values of selection and/or eCCE have no effect on the reality of scheme
It applies.Such as first threshold can also be arranged to 80,90 equivalences, the eCCE of the first quantity is arranged to 3, the eCCE of the second quantity
6 grades other suitable values are arranged to, this both depends on the specific implementation of scheme.For example, it may be possible to the resource element included in eCCE
When the quantity of element is too small, just no longer ePDCCH is transmitted in this frame.
Below by using the eCCE of the first quantity as 2, the eCCE of the second quantity is 4, and first threshold is discussed for 72.
Specifically, Tables 1 and 2 respectively illustrates the configuration of eCCE of the Physical Resource Block centering without PBCH, PSS, SSS
The configuration scenario of the eCCE of situation and Physical Resource Block centering with PBCH, PSS, SSS is (here, Tables 1 and 2 is only to be specific
Ground elaboration is of the invention and uses, and nonrestrictive).Further, since in standard process, it will be in Physical Resource Block pair
It discusses with ePDCCH whether is transmitted under PBCH, PSS, SSS situation, so herein table 1 will be categorized into the configuration of eCCE
With table 2.
Table 1 (Physical Resource Block centering does not have PBCH, PSS, SSS)
Table 2 (Physical Resource Block centering has PBCH, PSS, SSS)
In tables 1 and 2, the first row has indicated PDCCH symbolic numbers (quantity of shared RE), CRS port numbers (institute respectively
Need RE quantity), PBCH, PSS/SSS, CSI-RS and in each Physical Resource Block to having 4 eCCE and 2 eCCE situations
Under the quantity of RE that includes of average each eCCE, wherein RE represents resource element.Yes expressions have in table, and No is represented not
Have.
Referring to Tables 1 and 2, it should be pointed out that the configuration of CSI-RS is very flexible, by CSI-RS in Tables 1 and 2
It is arranged to occupy 8 resource elements, this is only an example.In practice, CSI-RS institutes can be changed according to the configuration of base station
The quantity of the resource element of occupancy.In addition, because PDCCH decodings are carried out by CRS, if without CRS, just do not have
There are PDCCH for necessity.For the fraction occurred in Tables 1 and 2, such as 31.5, this is not intended that there are half of resource element, and
It is merely meant that the quantity of the resource element shared by average each eCCE, such as in the case of with 4 eCCE, this 4 eCCE
31,32,31,32 resource elements can be respectively provided with.Also, all show each physical resource in the rightmost of Tables 1 and 2
Block is to having 4 eCCE and 2 eCCE both situations, this simply facilitates the blind decoding of user equipment, so being not precluded from
The situation of the eCCE of other quantity not shown in Tables 1 and 2.
It, can be in addition, those skilled in the art is it will be readily appreciated that under various situations shown in Tables 1 and 2
Therefore resource element value according to shared by frame structure draws various signals also can obtain the physics gone out as Table 1 and Table 2 below
The quantity of the available resource elements of resource block pair, is just no longer described in detail herein.
For example, see the 7th row in table 1, PDCCH occupies an OFDM symbol (occupying 10 resource elements), and CRS has
One antenna port (occupying 8 resource elements), and the situation without PBCH, PSS/SSS, then by the way that 24 DM- will be removed
RS needs 144 resource elements after 24 resource elements of occupancy to subtract 18 to obtain resource currently available in this case
The quantity of element is 126.And since 126 are more than threshold value 72, then 4 eCCE will be chosen, by that by 126 divided by 4, can obtain
The quantity (being 31.5 in this example embodiment) of average each occupied resource elements of eCCE.For another example, referring to the 45th in table 2
Row, there are one two OFDM symbols of PDCCH occupancy (occupying 22 resource elements), CRS tools, and antenna port (occupies 8 resource elements
Element), there is PBCH (occupying 46 resource elements), the situation without PSS/SSS, then by that will remove 24 DM-RS needs
144 resource elements after 24 resource elements of occupancy subtract 76 to obtain resource element currently available in this case
Quantity is 68.And since 68 are less than threshold value 72, then 2 eCCE will be chosen, it is averagely each by that by 68 divided by 2, can obtain
The quantity (being 34 in this example embodiment) of the occupied resource elements of eCCE.
In a preferred embodiment, network entity (base station and user equipment) all has Tables 1 and 2, and according to step
The rule of rapid S302 carries out the configuration to eCCE by means of Tables 1 and 2, such as chooses the quantity of eCCE, determines average each
The quantity of resource element shared by eCCE.Certainly, base station and user equipment can also be without Tables 1 and 2s, and can alternatively root
It usually calculates the quantity of eCCE in real time according to currently available resource element, determines the number of the resource element shared by average each eCCE
Amount.
In conclusion base station and user equipment can determine the quantity of eCCE by step S301 and step S302, and
Thereby determine that the quantity of the resource element shared by averagely each eCCE.
Then, when the quantity of the resource element shared by averagely each eCCE is integer, method enters step S303.
Step S303 is similar with step S203, in step S303, resource of the network entity shared by by averagely each eCCE
The quantity of element is determined as the quantity of the resource element shared by each eCCE.Such case can be used for 144 resource elements,
The quantity of resource element shared by 4 eCCE is all determined as 36,36,36,36.
Similar to the step of correlation shown in Fig. 2, when the quantity of the resource element shared by averagely each eCCE is non-whole
, it is necessary to judge there is the second pre-defined rule in base station with whether user equipment is shared during number.Being shared when base station and user equipment has second
During pre-defined rule, method enters step S304.Otherwise S305 is entered step.Herein, it should be pointed out that second herein is predetermined
Rule may be the same or different with the first pre-defined rule above.
Step 304 is similar with step 204 corresponding in Fig. 2, such as with average each under above 4 eCCE situations
Exemplified by resource element shared by eCCE is 31.5, if base station and user equipment are shared in advance to have (predefined to have) by 4 eCCE
The quantity of resource element be respectively set to 31,32,31,32 this rule, then base station and user equipment can be respectively according to should
Pre-defined rule is determined the quantity of each shared resource element in 4 eCCE.Here, the pre-defined rule is preferably
Minimize the difference between the quantity of the resource element shared by each eCCE.Certainly, other applicable rule are also not excluded for herein
Then.Such as the pre-defined rule that base station and user equipment are shared can also be 32,32,32,30.
And when base station and user equipment are not shared and have above-mentioned rule, then base station is determined each based on the pre-defined rule
The quantity of resource element shared by eCCE determines 31,32,31,32, and sends the second information to user equipment, this second
(information for example can be by public for the quantity of the resource element shared by eCCE and the eCCE shared by information instruction user equipment
The control information of search space (Common Searching Space, CSS) realizes or by high-level signaling, such as wirelessly
Resource control signaling (Radio Resource Control, RRC) is sent).Then, user equipment based on the second information come really
Determine the quantity of the resource element shared by the eCCE and the eCCE shared by it.
In the embodiment of another variation, when base station determines each eCCE institutes to be different from the rule of the first pre-defined rule
During the quantity of the resource element accounted for, such as in the above example, the quantity of the resource element of 4 eCCE is respectively set to 33,
33rd, 30,30 or 33,32,31,30 etc. whens, base station can also tell above-mentioned configuration to user equipment by the second information, in order to
User equipment carries out subsequent operation.
In the embodiment of another variation, if 4 eCCE correspond to such as 2 user equipmenies, preferably, base respectively
Needs of standing to two user equipmenies send information respectively, to tell eCCE of two user equipmenies corresponding to it and corresponding
The quantity of resource element in eCCE, so as to avoid the unnecessary excessive blind decoding of user equipment.
Therefore, by step S305, user equipment it is shared have pre-defined rule in the case of, can be received from base station
Second information, and determine therefrom that out the quantity of the eCCE shared by it and the resource element shared by eCCE.Certainly, it is even if more existing
In the case of a user equipment, user equipment can also know the eCCE shared by other user equipmenies by appropriate signaling
With the quantity of the resource element shared by eCCE.
In conclusion in step shown in Fig. 3, base station and user equipment (network entity) can separately be implemented
Step S301, S302, S303 and S304.Only in step S205, it is necessary to base station send additional message come with user equipment into
Row interaction, so as to come complete to be used for ePDCCH eCCE configure.
Fig. 4 shows the flow chart of the method for the step S2 in implementation Fig. 1 according to an embodiment of the invention.Fig. 4
Described in embodiment in, the fixation of the quantity of the eCCE eREG occupied is determined as 4.
Specifically, in step S401, the quantity of the eCCE eREG occupied is determined as 4 by network entity, and really
Allocate the quantity of the resource element shared by each eREG.Such as by by means of embodiment described in Fig. 2 or Fig. 3, it may be determined that
Go out the quantity of the occupied resource elements of each eCCE.It is possible thereby to quantity divided by eREG by the occupied resource elements of eCCE
Quantity (being herein 4), to determine the quantity of the resource element shared by average each eREG.For example, there are 4 above
In the case of eCCE, 4 eCCE are respectively provided with 31,32,31,32 resource elements, by above-mentioned value difference divided by 4, thus
ECCE has the situation of 31 resource elements, and the quantity of the resource element shared by average each eREG is 7.75, is had in eCCE
In the case of 32 resource elements, the quantity of the resource element shared by average each eREG is 8.
When the quantity of the resource element shared by averagely each eCCE is integer, method enters step S402.In step
In S402, the quantity of the resource element shared by averagely each eREG is determined as the resource element shared by each eREG by network entity
Quantity.Such case that the quantity of resource element shared by i.e. average each eREG is 8, by the resource element shared by 4 eCCE
The quantity of element is all determined as 8,8,8,8.
When the resource element shared by averagely each eREG quantity be non-integer when, it is necessary to judge that base station is with user equipment
No share has the 3rd pre-defined rule.When base station and user equipment, which are shared, three pre-defined rules, method enters step S403.It is no
Then enter step S404.
Specifically, such as the quantity of the resource element shared by averagely each eREG it is 7.75 this situations, if base
Stand and user equipment it is shared in advance have (predefined to have) by the quantity of the resource element of 4 eREG be respectively set to 8,8,8,7 this
One rule, then shared by base station and user equipment can be determined each in 4 eREG according to the pre-defined rule respectively
Resource element quantity.Here, the pre-defined rule is preferably to minimize between the quantity of the resource element shared by each eREG
Difference.Certainly, other applicable rules are also not excluded for herein.Such as pre-defined rule that base station and user equipment are shared
Can also be 9,8,7,7.
And when base station and user equipment are not shared and have above-mentioned rule, then base station is determined each based on the pre-defined rule
The quantity of resource element shared by eCCE determines 8,8,8,7, and sends the 3rd information, the 3rd information to user equipment
(information can for example pass through public search space to the quantity of the resource element shared by each eREG shared by instruction user equipment
The control information of (Common Searching Space, CSS) is realized or by high-level signaling, such as wireless heterogeneous networks
Signaling (Radio Resource Control, RRC) is sent).Then, user equipment is determined based on the 3rd information shared by it
Each eREG shared by resource element quantity.
In the embodiment of another variation, when base station determines each eREG institutes to be different from the rule of the 3rd pre-defined rule
During the quantity of the resource element accounted for, such as in the above example, the quantity of the resource element of 4 eREG is respectively set to 6,8,
8th, 9 etc. whens, base station can also tell above-mentioned configuration to user equipment by the 3rd information, in order to user equipment carry out it is subsequent
Operation.
Therefore, by step S404, user equipment it is shared have pre-defined rule in the case of, can be received from base station
3rd information, and determine therefrom that out the quantity of the eREG shared by it and the resource element shared by eREG.
In conclusion in step shown in Fig. 4, base station and user equipment (network entity) can separately be implemented
Step S401, S402, S403., it is necessary to which base station sends additional message to be interacted with user equipment only in step S405,
So as to complete the configuration to eREG, i.e., the eCCE for being used for ePDCCH is configured.
Fig. 5 shows the flow chart of the method for implementing the step S2 in Fig. 1 according to another embodiment of the invention.Figure
The method that embodiment shown in 5 describes a kind of quantity for the eREG that eCCE of flexible configuration Physical Resource Block centering occupies, by
This can be according to the available resource element of current physical block centering, and then the resource element according to shared by averagely each eCCE
Quantity carry out the quantity of flexible configuration eREG, therefore optimize implementation process.
Specifically, in step 501, using each eCCE by being determined in the embodiment according to Fig. 2 or Fig. 3 descriptions
The quantity of shared resource element, when the quantity of the resource element shared by identified eCCE is greater than or equal to second threshold,
Network entity determines that an eCCE occupies the eREG of the 3rd quantity, and determines the number of the resource element shared by average each eREG
Amount, when the quantity of the resource element shared by identified eCCE is less than second threshold, network entity determines that an eCCE occupies
The eREG of 4th quantity, and determine the quantity of the resource element shared by average each eREG.
Specifically, herein for the sake of example, the eREG of the 3rd quantity is arranged to 4, the eREG of the 4th quantity is arranged to 2,
Second threshold is arranged to 16.It is noted that those numerical value are only preferred, and not restrictive, it is fixed not also to be.
It will be understood by those of skill in the art that the other threshold values of selection or the quantity of eREG have no effect on the implementation of scheme.Below
By using the eREG of the 3rd quantity as 2, the eREG of the 4th quantity is 4, and second threshold is discussed for 16 as example.
Specifically, when the quantity of the resource element shared by eCCE is, for example, 36, since 36 more than 16, then by the number of eREG
Amount is arranged to 4, and determines the quantity of the resource element shared by averagely each eREG for 9 (by the way that 36 resource elements are removed
With 4 eREG).And when the quantity of the resource element shared by eCCE is such as 15, then the quantity of eREG is arranged to 2, and
The quantity for determining the resource element shared by averagely each eREG is 7.5.
In conclusion base station and user equipment can determine the quantity of eREG by step S501, and thereby determine that flat
The quantity of resource element shared by each eREG.
Then, when the quantity of the resource element shared by averagely each eREG is integer, method enters step S502.In step
In rapid S502, the quantity of the resource element shared by averagely each eREG is determined as the resource element shared by each eREG by network entity
The quantity of element.It is, for example, 36 i.e. for the quantity of the resource element shared by eCCE, the resource element shared by average each eREG
Quantity is 9 this situations, and the quantity of the resource element shared by 4 eREG is all determined as 9,9,9,9.
When the resource element shared by averagely each eREG quantity be non-integer when, it is necessary to judge that base station is with user equipment
No share has the 4th pre-defined rule.When base station and user equipment, which are shared, four pre-defined rules, method enters step S503.It is no
Then enter step 504.Herein, it should be pointed out that the 4th pre-defined rule herein can phase with the 3rd pre-defined rule above
It together, can not also be same.
Specifically, it is similar with the step S404 in Fig. 4, for there are 4 eREG, and shared by average each eREG
The quantity of resource element is 7.75 this situations, if base station and user equipment are shared in advance to have (predefined to have) by 4 eREG
The quantity of resource element be respectively set to 8,8,8,7 this rule, then base station and user equipment can be predetermined according to this respectively
Rule is determined the quantity of each shared resource element in 4 eREG.Here, the pre-defined rule is preferably minimum
Change the difference between the quantity of the resource element shared by each eREG.Certainly, other applicable rules are also not excluded for herein.Example
The pre-defined rule as base station and user equipment are shared can also be 9,8,7,7.
And when base station and user equipment are not shared and have above-mentioned rule, then base station is determined each based on the pre-defined rule
The quantity of resource element shared by eCCE determines 8,8,8,7, and sends the 4th information, the 4th information to user equipment
(information can for example pass through public search space to the quantity of the resource element shared by each eREG shared by instruction user equipment
The control information of (Common Searching Space, CSS) is realized or by high-level signaling, such as wireless heterogeneous networks
Signaling (Radio Resource Control, RRC) is sent).Then, user equipment is determined based on the 4th information shared by it
Each eREG shared by resource element quantity.
In the embodiment of another variation, when base station determines each eREG institutes to be different from the rule of the 4th pre-defined rule
During the quantity of the resource element accounted for, such as in the above example, the quantity of the resource element of 4 eREG is respectively set to 6,8,
8th, 9 etc. whens, base station can also tell above-mentioned configuration to user equipment by the 4th information, in order to user equipment carry out it is subsequent
Operation.Therefore, by step S505, user equipment it is shared have pre-defined rule in the case of, the can be received from base station
Four information, and determine therefrom that out the quantity of the resource element shared by the eREG shared by it.
In conclusion in the step shown in Fig. 5, base station and user equipment (network entity) can separately be implemented
Step S501, S502, S503., it is necessary to which base station sends additional message to be interacted with user equipment only in step S504,
So as to complete the configuration to eREG, i.e., the eCCE for being used for ePDCCH is configured.
Those skilled in the art will be understood that above-described embodiment is illustrative and not restrictive.In different embodiments
The different technologies feature of middle appearance can be combined, to obtain advantageous effect.Those skilled in the art are in research attached drawing, explanation
On the basis of book and claims, it will be understood that and realize the embodiment of other variations of revealed embodiment.For example,
Predefined step, shared step can be substituted by subsequently sending relevant signaling, otherwise also may be used.
In detail in the claims, term " comprising " is not precluded from other devices or step；Indefinite article "one" be not excluded for
It is multiple；Term " first ", " second " are used to indicate title not for any specific order of expression.Any reference numeral is not
It should be understood limiting of its scope.The function of the multiple portions occurred in claim can be by an individual part
To realize.
Claims (10)
1. a kind of method for the eCCE that ePDCCH is configured in the network entity of communication system, wherein, the described method includes
Following steps：
A. determine that a Physical Resource Block centering can be used for the quantity of the resource element of transmission ePDCCH, and can be used for based on described
The quantity of the resource element of ePDCCH is transmitted to determine shared by the quantity of the eCCE of the Physical Resource Block centering and each eCCE
Resource element quantity,
Wherein, the step a further comprises：
A11. the quantity of the eCCE of the Physical Resource Block centering is determined as 4, and based on identified Physical Resource Block centering
The quantity of eCCE determine the quantity of the resource element shared by average each eCCE；And
A12. when the quantity of the resource element shared by average each eCCE is non-integer, step a12-1 or a12- are performed
2:
A12-1. the network entity includes base station and user equipment, and shares first with the user equipment when the base station
During pre-defined rule, the base station and the user equipment determine the resource shared by each eCCE based on first pre-defined rule
The quantity of element；
A12-2. the network entity includes base station and user equipment, and when the base station does not share the with the user equipment
During one pre-defined rule, the base station determines the quantity of the resource element shared by each eCCE based on first pre-defined rule,
And the first information is sent to the user equipment, the first information indicates the eCCE and the eCCE shared by the user equipment
The quantity of shared resource element, and the user equipment receives the first information from the base station, and based on institute
The first information is stated to determine the quantity of the resource element shared by the eCCE and the eCCE shared by it,
Alternatively, the step a further comprises:
A21. when the quantity of the available resource element is greater than or equal to first threshold, the eCCE of the first quantity is determined, and
The quantity of the resource element shared by average each eCCE is determined based on the eCCE of first quantity, when the available resource
When the quantity of element is less than the first threshold, the eCCE of the second quantity is determined, and the eCCE based on second quantity is come really
Allocate the quantity of the resource element shared by each eCCE；And
A22. when the quantity of the resource element shared by average each eCCE is non-integer, step a22-1 or a22- are performed
2:
A22-1. the network entity includes base station and user equipment, and shares second with the user equipment when the base station
During pre-defined rule, the base station and the user equipment determine the resource shared by each eCCE based on second pre-defined rule
The quantity of element；
A22-2. the network entity includes base station and user equipment, and when the base station does not share the with the user equipment
During two pre-defined rules, the base station determines the quantity of the resource element shared by each eCCE based on second pre-defined rule,
And the second information is sent to the user equipment, second information indicates the eCCE and the eCCE shared by the user equipment
The quantity of shared resource element, and the user equipment receives second information from the base station, and based on institute
The second information is stated to determine the quantity of the resource element shared by the eCCE and the eCCE shared by it.
2. according to the method described in claim 1, it is characterized in that, first pre-defined rule and/or the second pre- set pattern
Then include minimizing the difference between the quantity of the resource element shared by each eCCE.
3. according to the method described in claim 1, it is characterized in that, the eCCE of first quantity be 4, second quantity
ECCE is 2.
4. according to the method described in claim 1, it is characterized in that, the first threshold is 72.
5. according to the method described in claim 1, it is characterized in that, the method further includes step b：
B. the quantity of eREG that an eCCE occupies and the quantity of the resource element shared by each eREG are determined.
6. according to the method described in claim 5, it is characterized in that, the step b further comprises：
B11. the quantity of the eCCE eREG occupied is determined as 4, and determines the resource element shared by average each eREG
Quantity；And
It b12., will be shared by average each eREG when the quantity of the resource element shared by average each eREG is integer
The quantity of resource element be determined as the quantity of the resource element shared by each eREG, when the money shared by average each eREG
When the quantity of source element is non-integer, step b12-1 or b12-2 are performed:
B12-1. the network entity includes base station and user equipment, and shares the 3rd with the user equipment when the base station
During pre-defined rule, the base station and the user equipment determine the resource shared by each eREG based on the 3rd pre-defined rule
The quantity of element；
B12-2. the network entity includes base station and user equipment, and when the base station does not share the with the user equipment
During three pre-defined rules, the base station determines the quantity of the resource element shared by each eREG based on the 3rd pre-defined rule,
And the 3rd information is sent to the user equipment, the 3rd information is indicated shared by each eREG shared by the user equipment
Resource element quantity, and the user equipment receives the 3rd information from the base station, and based on described the
Three information determine the quantity of the resource element shared by each eREG shared by it.
7. according to the method described in claim 5, it is characterized in that, the step b further comprises：
B21. when the quantity of the resource element shared by identified eCCE is greater than or equal to second threshold, determine that an eCCE is accounted for
There is the eREG of the 3rd quantity, and determine the quantity of the resource element shared by average each eREG, when shared by identified eCCE
The quantity of resource element when being less than the second threshold, determine that an eCCE occupies the eREG of the 4th quantity, and determine flat
The quantity of resource element shared by each eREG；And
It b22., will be shared by average each eREG when the quantity of the resource element shared by average each eREG is integer
The quantity of resource element be determined as the quantity of the resource element shared by each eREG, when the money shared by average each eREG
When the quantity of source element is non-integer, step b22-1 or b22-2 are performed：
B22-1. the network entity includes base station and user equipment, and shares the 4th with the user equipment when the base station
During pre-defined rule, the base station and the user equipment determine the resource shared by each eREG based on the 4th pre-defined rule
The quantity of element；
B22-2. the network entity includes base station and user equipment, and when the base station does not share the with the user equipment
During four pre-defined rules, the base station determines the quantity of the resource element shared by each eREG based on the 4th pre-defined rule,
And the 4th information is sent to the user equipment, the 4th information is indicated shared by each eREG shared by the user equipment
Resource element quantity, and the user equipment receives the 4th information from the base station, and based on described the
Four information determine the quantity of the resource element shared by each eREG shared by it.
8. the method according to claim 6 or 7, which is characterized in that the 3rd pre-defined rule and/or described 4th predetermined
Rule includes minimizing the difference between the quantity of the resource element shared by each eREG.
9. the method according to the description of claim 7 is characterized in that the eREG of the 3rd quantity be 4, the 4th quantity
EREG is 2.
10. the method according to the description of claim 7 is characterized in that the second threshold is 16.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210265061.1A CN103582135B (en) | 2012-07-27 | 2012-07-27 | A kind of method for the eCCE for being configured to ePDCCH |
| PCT/IB2013/001644 WO2014016672A1 (en) | 2012-07-27 | 2013-07-09 | Method of configuring ecce for epdcch |
| TW102124924A TW201417606A (en) | 2012-07-27 | 2013-07-11 | Method of configuring ECCE for EPDCCH |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210265061.1A CN103582135B (en) | 2012-07-27 | 2012-07-27 | A kind of method for the eCCE for being configured to ePDCCH |
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| Publication Number | Publication Date |
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| CN103582135A CN103582135A (en) | 2014-02-12 |
| CN103582135B true CN103582135B (en) | 2018-05-25 |
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| CN201210265061.1A Active CN103582135B (en) | 2012-07-27 | 2012-07-27 | A kind of method for the eCCE for being configured to ePDCCH |
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| Country | Link |
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| CN (1) | CN103582135B (en) |
| TW (1) | TW201417606A (en) |
| WO (1) | WO2014016672A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108833066A (en) * | 2012-09-29 | 2018-11-16 | 索尼公司 | Base station equipment, terminal device and communication system |
| CN106304340A (en) * | 2015-05-13 | 2017-01-04 | 夏普株式会社 | Subscriber equipment, base station and correlation technique |
| US10178659B2 (en) | 2015-11-09 | 2019-01-08 | Htc Corporation | Device and method of handling shortened enhanced physical downlink control channel transmission |
| EP3260339A1 (en) | 2016-06-20 | 2017-12-27 | Haldex Brake Products Aktiebolag | Disc brake actuator for a vehicle |
| WO2019028770A1 (en) | 2017-08-10 | 2019-02-14 | 华为技术有限公司 | Communication method, terminal device, and network device |
| CN110557222B (en) * | 2018-05-31 | 2020-07-14 | 展讯通信（上海）有限公司 | Transmission control method and device of downlink control information, storage medium, base station and terminal |
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| EP2633333B1 (en) * | 2010-11-15 | 2018-03-21 | Huawei Technologies Co., Ltd. | System and method for resource management in a communications system |
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2012
- 2012-07-27 CN CN201210265061.1A patent/CN103582135B/en active Active
-
2013
- 2013-07-09 WO PCT/IB2013/001644 patent/WO2014016672A1/en active Application Filing
- 2013-07-11 TW TW102124924A patent/TW201417606A/en unknown
Non-Patent Citations (2)
| Title |
|---|
| Definitions of eREG and eCCE;Panasonic;《3GPP TSG RAN WG1 Meeting #69》;20120525;第2章节，图1-3，表1 * |
| R1-121963：eCCE definition for ePDCCH;Huawei等;《3GPP TSG RAN WG1 Meeting #69》;20120525;第2章节 * |
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| TW201417606A (en) | 2014-05-01 |
| WO2014016672A1 (en) | 2014-01-30 |
| CN103582135A (en) | 2014-02-12 |
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