WO2014110817A1 - 一种确定epdcch候选的方法及设备 - Google Patents
一种确定epdcch候选的方法及设备 Download PDFInfo
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- WO2014110817A1 WO2014110817A1 PCT/CN2013/070731 CN2013070731W WO2014110817A1 WO 2014110817 A1 WO2014110817 A1 WO 2014110817A1 CN 2013070731 W CN2013070731 W CN 2013070731W WO 2014110817 A1 WO2014110817 A1 WO 2014110817A1
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- Prior art keywords
- epdcch
- ecss
- determining
- occupied
- physical
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
-
- 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
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to the field of wireless communications, and in particular, to a method and a device for determining an enhanced physical downlink control channel (EPDCCH) candidate.
- EPDCCH enhanced physical downlink control channel
- a base station may transmit an EPDCCH to a specific transmission resource, and send carrier-related control information to the UE by transmitting an EPDCCH.
- the UE may also search for an EPDCCH in a specific transmission resource, thereby searching from the UE.
- the relevant configuration information of the carrier is obtained by parsing into the EPDCCH.
- the base station determines an available EPDCCH resource set from the subframe, and determines, according to the aggregation level of the EPDCCH to be transmitted, the number of the candidates corresponding to the aggregation level and the allocation manner from the EPDCCH resource set, which are to be transmitted.
- the EPDCCH is placed in any candidate and sent to the UE.
- the UE may determine the number and allocation mode of the candidate resources corresponding to each aggregation level in the same manner, and the UE may try to detect the candidates of different aggregation levels separately.
- the relevant control information of the carrier is obtained from the detected correct EPDCCH.
- the embodiments of the present invention provide an EPDCCH transmission method and device, which can avoid EPDCCH blocking and improve the reliability of control information transmission.
- a first aspect of the present invention provides a method for determining an enhanced physical downlink control channel EPDCCH candidate, where an EPDCCH candidate on at least two carriers is located on one of the at least two carriers in a cross-carrier scheduling process.
- the method includes:
- One EPDCCH candidate of the EPDCCH with an aggregation level of L corresponds to L consecutive ECCEs, and one EPDCCH candidate can place one EPDCCH;
- the determining the number of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex and each The ECCE corresponding to the EPDCCH candidate includes the ECCE corresponding to the mth EPDCCH candidate according to the following formula: ZL + 1
- the ⁇ is a random value related to the subframe number k and the EPDCCH resource set p, where p and k are integers, and M) is the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- M Cellindex is a predefined candidate offset of the carrier corresponding to the index Cellindex
- the determining the number of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex and the ECCE corresponding to each EPDCCH candidate includes: ECCE corresponding to m EPDCCH candidates:
- the ⁇ is a random value related to the subframe number k and the EPDCCH set index p, where p and k are integers, and M) is the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- M is the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- n is the number of carriers Q of the user equipment, or
- n is the number of carriers that the user equipment can schedule in the EPDCCH set p, and includes the carrier that is activated and deactivated by the user equipment in the EPDCCH set p in the subframe k.
- the mn (tex is a relative offset of the same numbered candidate between the respective carriers related to the index Cellindex;
- the value of the 3 ⁇ 4 llmdra ranges from 0 to the number of carriers aggregated by the user equipment carrier.
- the schedulable number of carriers D2-1 includes a carrier that is activated and deactivated by the user equipment in the EPDCCH set p in the subframe k.
- a sequence numbered first number sequence is obtained according to an index of each carrier, Cellindex from small to large or from large to small, and the frame is the carrier index Cellindex in the first number sequence.
- the value is the value of the index Cellindex.
- a second aspect of the present invention provides an apparatus for determining an enhanced physical downlink control channel EPDCCH candidate, where an EPDCCH candidate on at least two carriers is located on one of the at least two carriers in an inter-carrier scheduling process.
- a first determining unit configured to determine the EPDCCH resource set p in a subframe k, where the EPDCCH resource set p includes q resource block pairs, and each of the resource block pairs corresponds to r enhanced control channel units ECCE
- the aggregation level L is a EPDCCH EPDCCH candidates corresponding to the L consecutive numerals ECCE, - EPDCCH candidates can be placed in a EPDCCH;
- a second determining unit configured to determine an EPDCCH candidate number of an aggregation level L of a carrier corresponding to the index Cellindex and an ECCE corresponding to each EPDCCH candidate in the EPDCCH resource set p determined by the first determining unit, where the aggregation level
- the ECCE corresponding to each EPDCCH candidate of L is related to the index Cellindex.
- the second determining unit is further configured to obtain, according to the following formula, a corresponding one of the mth EPDCCH candidates.
- the ⁇ is a random value related to the subframe number k and the EPDCCH resource set p, where p and k are integers, and M) is the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- M Cellindex is a predefined candidate offset of the carrier corresponding to the index Cellindex
- the second determining unit is further configured to use the ECCE corresponding to the root candidate: modi N ECCEpk IL > + i
- the ⁇ is a random value related to the subframe number k and the EPDCCH set index p, where p and k are integers, and M) is the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- M is the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- the second determining unit is further configured to obtain, according to the following formula, an ECCE corresponding to the mth EPDCCH candidate:
- the ⁇ is a random value related to the subframe number and the EPDCCH set index p, where p and k are integers, and M) is that the user equipment UE corresponding to the EPDCCH candidate corresponds to the aggregation level L of the EPDCCH resource set p.
- n is the number of carriers Q of the user equipment, or
- n is the number of carriers that the user equipment can schedule in the EPDCCH set p, and includes the carrier that is activated and deactivated by the user equipment in the EPDCCH set p in the subframe k.
- the mn (tex is a relative offset of the same numbered candidate between the respective carriers related to the index Cellindex;
- said 3 ⁇ 4llmdra ranges from 0 to the user equipment for carrier aggregation D1-1 number of carriers, or user equipment can be scheduled in the EPDCCH D2-1 number of carriers, the number of carriers that can be scheduled D2-1
- the carrier including the activation and deactivation of the user equipment in the EPDCCH set p in the subframe k is included.
- the cell index is obtained from the smallest to the largest or from the largest to the smallest, and the first numbered sequence is sequentially numbered, and the number is the number of the carrier index Cellindex in the first number sequence.
- a third aspect of the present invention provides an apparatus for determining an enhanced physical downlink control channel EPDCCH candidate, where an EPDCCH candidate on at least two carriers is located on one of the at least two carriers in a cross-carrier scheduling process.
- a memory configured to store program code for determining an EPDCCH candidate
- one EPDCCH candidate of the EPDCCH with an aggregation level of L corresponds to L consecutive ECECs, EPDCCH candidates capable of placing one EPDCCH; determining an EPDCCH candidate number of an aggregation level L of a carrier corresponding to the index Cellindex and an ECCE corresponding to each EPDCCH candidate, wherein the ECCE corresponding to each EPDCCH candidate of the aggregation level L is Index Cellindex related.
- the determining the number of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex and the ECCE corresponding to each EPDCCH candidate includes: ECCE corresponding to m EPDCCH candidates:
- Cellindex is the predefined candidate offset of the carrier corresponding to the index Cellindex
- the determining the number of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex and the ECCE corresponding to each EPDCCH candidate includes: ECCE corresponding to m EPDCCH candidates: modi N ECCE pk IL
- a random value related to the subframe number k and the EPDCCH set index p is corresponding to the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- n is the number of carriers Q of the user equipment, or
- n is the number of carriers that the user equipment can schedule in the EPDCCH set p, and includes the carrier that is activated and deactivated by the user equipment in the EPDCCH set p in the subframe k.
- the mn (tex is a relative offset of the same numbered candidate between the respective carriers related to the index Cellindex;
- said 3 ⁇ 4llmdra ranges from 0 to the user equipment for carrier aggregation D1-1 number of carriers, or user equipment can be scheduled in the EPDCCH D2-1 number of carriers, the number of carriers that can be scheduled D2-1
- the carrier including the activation and deactivation of the user equipment in the EPDCCH set p in the subframe k is included.
- the cell index is obtained from the smallest to the largest or from the largest to the smallest, and the first numbered sequence is sequentially numbered, and the number is the number of the carrier index Cellindex in the first number sequence.
- the value is the value of the index Cellindex.
- the station includes: a device that determines an EPDCCH candidate, and a sending device;
- the transmitting device is configured to: send an EPDCCH in which the index Cellindex is a carrier of the carrier indication domain index Cellindex to one of the EPDCCH candidates determined by the device that determines the EPDCCH candidate.
- a fifth aspect of the present invention provides a user equipment UE, in an inter-carrier scheduling process, in which an EPDCCH candidate on at least two carriers is located on one EPDCCH resource set on one of the at least two carriers, where
- the receiving device is configured to detect an EPDCCH candidate determined by the device that determines the EPDCCH candidate, and when the correct EPDCCH is detected, obtain the first index Cellindex from the correct EPDCCH to be a carrier indication domain index Cellindex
- the control information of the carrier when the correct EPDCCH is not detected, indicates that the device that determines the EPDCCH candidate continues to use other aggregation levels to determine the number of EPDCCH candidates of other aggregation levels of the carrier corresponding to the index Cellindex and corresponding to each EPDCCH candidate. ECCE until the correct EPDCCH is detected, or the qxr ECCEs are traversed.
- a method for determining an ECSS resource for enhancing a public search space including:
- Determining a location of the physical resource occupied by the ECSS where the location of the physical resource occupied by the ECSS is a predefined location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth, or A random location associated with at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth.
- the determining, by the predetermined rule, the number N of physical resources occupied by the ECSS includes:
- the number N of physical resources occupied by the ECSS is related to the system bandwidth.
- the location of the physical resource occupied by the ECSS is a physical cell ID, a virtual cell ID, a sub-slot slot number, and a system. At least one related predefined location in the bandwidth, including:
- the physical resource location occupied by the ECSS is:
- - 1 The number of the first physical resource block pair occupied by the ECSS of the k-1th child, ⁇ 1 .
- X is the virtual cell ID
- N RB is the system bandwidth.
- the physical resource location occupied by the ECSS is:
- Y k , i (1, 1, + offset) mod N RB
- - u is the i-th physical resource block pair number occupied by the k-1th sub-element ECs, which may be a virtual cell ID or a sub- ⁇ The slot number
- N RB is the system bandwidth.
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth. , including:
- Each physical resource occupied by ECSS is randomly generated
- the first physical resource occupied by the ECSS is randomly generated.
- Yu x
- X is the virtual cell ID
- N is the number of physical resource blocks occupied by the ECSS
- i 0, l...Nl
- N RB is the system bandwidth.
- N RB is the system bandwidth.
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth. , including:
- the entire system bandwidth is divided into N groups of predefined resources that do not overlap each other.
- the physical resources occupied by ECSS of different cells in different sub-cells are physical or virtual cell IDs and sub-time slots determined by a random function in the resource group.
- the random function is a hash Hash function.
- a seventh aspect of the present invention provides a device for determining an ECSS resource, including: a third determining unit, configured to be configured by a high layer signaling or determining a number N of physical resources occupied by the ECSS according to a predetermined rule;
- a fourth determining unit configured to be occupied by the ECSS determined by the third determining unit The number of physical resources N, determining the location of the physical resources occupied by the ECSS, where
- the location of the physical resource occupied by the ECSS is a predefined location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth, or with a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth. At least one related random location.
- the number N of physical resources occupied by the ECSS is related to the system bandwidth.
- the location of the physical resource occupied by the ECSS is related to at least one of a physical cell ID, a virtual cell ID, a sub-slot slot number, and a system bandwidth.
- Predefined locations including:
- the physical resource location occupied by the ECSS determined by the fourth determining unit is:
- - 1 The number of the first physical resource block pair occupied by the ECSS of the k-1th child, ⁇ 1 .
- X is the virtual cell ID
- N RB is the system bandwidth.
- the physical resource location occupied by the ECSS determined by the fourth determining unit is:
- Y k ,i ( — 1,, ⁇ + offset) mod N RB
- N the number of physical resource blocks occupied by the ECSS
- i 0, 1...N-1
- N RB is the system bandwidth
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth. , including:
- Each physical resource occupied by ECSS is randomly generated
- the first physical resource occupied by the ECSS is randomly generated.
- the physical resource location occupied by the ECSS determined by the fourth determining unit is:
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth. , including: The entire system bandwidth is divided into N groups of pre-defined resources that do not overlap each other.
- the physical resources occupied by ECSS of different cells in different sub-cells are physical or virtual cell IDs and sub-time slots determined by a random function in the resource group. A random set of numbers associated with at least one of the system bandwidths.
- the random function is a hash Hash function.
- a device for determining an ECSS resource for enhancing a common search space including:
- a memory configured to store program code for determining an ECSS resource
- a processor configured to read and run program code stored in the memory, the program code is configured to: perform high-level signaling configuration or determine a number N of physical resources occupied by the ECSS according to a predetermined rule;
- Determining a location of the physical resource occupied by the ECSS where the location of the physical resource occupied by the ECSS is a predefined location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth, or A random location associated with at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth.
- the number N of physical resources occupied by the ECSS is related to the system bandwidth.
- the location of the physical resource occupied by the ECSS is related to at least one of a physical cell ID, a virtual cell ID, a sub-slot slot number, and a system bandwidth.
- Predefined locations including:
- the physical resource location occupied by the ECSS determined by the processor is:
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth. , including:
- the physical resource location occupied by the ECSS determined by the processor is:
- N RB is the system bandwidth.
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth. , including:
- the entire system bandwidth is divided into N groups of pre-defined resources that do not overlap each other.
- the physical resources occupied by ECSS of different cells in different sub-cells are physical or virtual cell IDs and sub-time slots determined by a random function in the resource group.
- the random function is a hash Hash function.
- the sending device is configured to: place an ECSS in the physical resource occupied by the ECSS determined by the device that determines the ECSS resource, and send the carrier after the ECSS is placed.
- a tenth aspect of the present invention provides a user equipment UE, in an inter-carrier scheduling process, in which an EPDCCH candidate on at least two carriers is located on one EPDCCH resource set on one of the at least two carriers, where
- an EPDCCH candidate of the EPDCCH with an aggregation level of L corresponds to L consecutive ECECs, and one EPDCCH candidate can place one EPDCCH; determining an index corresponding to Cellindex The number of EPDCCH candidates of the aggregation level L of the carrier and the ECCE corresponding to each EPDCCH candidate, where the ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex;
- the receiving device is configured to detect the ECSS in the physical resource occupied by the ECSS determined by the device that determines the ECSS resource, and parse the common control information of the cell.
- the method and device for determining an EDPCCH candidate provided by an embodiment of the present invention are determined to be used for determining
- the EPDCCH candidates of the two carriers with the same aggregation level are separated by one candidate offset, which may be different from the technology in which the EPDCCH candidates corresponding to the carrier with the same aggregation level in the prior art are completely overlapped.
- the EPDCCH candidates of the carrier are staggered, so that the EPDCCH of each carrier can be successfully placed in the corresponding EPDCCH candidate, and the EPDCCH candidate overlap is avoided to cause the partial EPDCCH to be discarded, thereby avoiding EPDCCH blocking and improving the reliability of control information transmission.
- FIG. 1 is a flowchart of a method for determining an EPDCCH candidate according to an embodiment of the present invention
- FIG. 2 is a flowchart of a method for determining an EPDCCH candidate according to another embodiment of the present invention
- FIG. 3 is a schematic diagram of a device for determining an EPDCCH candidate according to another embodiment of the present invention.
- FIG. 4 is a schematic diagram of a device configuration for determining an EPDCCH candidate according to another embodiment of the present invention.
- FIG. 5 is a flowchart of a method for determining an ECSS resource according to another embodiment of the present invention
- FIG. 6 is a schematic diagram of a device for determining an ECSS resource according to another embodiment of the present invention.
- FIG. 7 is a schematic diagram of a device for determining an ECSS resource according to another embodiment of the present invention.
- An embodiment of the present invention provides a method for determining an EPDCCH candidate, where an EPDCCH candidate on at least two carriers is located on an E PDCCH resource set on one of the at least two carriers, in an inter-carrier scheduling process,
- the method includes:
- the method for determining the EPDCCH resource set p that can be used for transmitting the EPDCCH is a prior art, which is not described in detail in the embodiment of the present invention.
- the EPDCCH resource set p may be composed of multiple resource block pairs. Specifically, on one subframe k, a pair of resource blocks (RBs) of two slots It is called a resource block pair (RB pair, RB pair). In actual transmission, a resource block pair used by a physical resource is also called a physical resource block pair (Physical RB pair, PRB pair). Depending on the type of subframe, there may be 2 or 4 Enhanced Control Channel Elements (ECCEs) within a PRB pair.
- ECCEs Enhanced Control Channel Elements
- the PRB pair has 16 Enhanced Resource Element Groups (EREGs), and the 16 EREG numbers are 0 1 2...15.
- EREGs Enhanced Resource Element Groups
- 4 EREGs form one ECCE, such a PBR pair includes 4 ECCEs.
- 8 EREGs form one ECCE, such that one PRB pair includes 2 ECCEs.
- Table 1 with aggregation level 1 as an example, one carrier EPDCCH has 4 EPDCCH candidates. There are 16 potential EPDCCH candidates in the EPDCCH resource set, respectively
- EPDCCH candidates for transmitting EPDCCH may be determined from these 16 potential EPDCCH candidates.
- the number of EPDCCH candidates depends on the aggregation level L t of the EPDCCH to be transmitted, and the number of EPDCCH candidates corresponding to different aggregation levels is different. For example, the number of candidates corresponding to the aggregation level 1 2 4 8 is 4 6 2 2
- the EPDCCH candidate distribution pattern of two carriers in the prior art, carrier 1 ( CA1 ) and carrier 2 ( CA2 ) in one EPDCCH resource set is the same as the aggregation level of the EPDCCH to be transmitted by the two carriers.
- L t so the prior art determines that the EPDCCH candidate of CA1 and the EPDCCH candidate of CA2 are distributed on the same ECCE, and one 20 ECCE can only place one PDCCH.
- 102. Determine an EPDCCH candidate number of an aggregation level L of a carrier corresponding to the index Cellindex and an ECCE corresponding to each EPDCCH candidate, where an ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex.
- the ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex, and indicates that the ECCE corresponding to each EPDCCH candidate can be calculated according to the index Cellindex and other related parameters, and the calculation method can be based on actual conditions. Need
- the determining the number of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex and the ECCE corresponding to each EPDCCH candidate includes: corresponding to the mth EPDCCH candidate according to the following formula ECCE: IL + 1
- ⁇ is a random value related to the subframe number k and the EPDCCH resource set p
- Y k + offset
- ⁇ 0 ⁇ (A ⁇ ⁇ 0 ⁇ ) mod D
- n RNTI n RNTI .
- offset is an integer, such as 3, which is an offset value of Y p' k of the two EPDCCH sets.
- A 39827
- D 65537
- k is the subframe number.
- the above y generation method is applicable to all embodiments herein.
- the ellmdex may be a relative offset of the same numbered candidate between the carriers corresponding to the index Cellindex.
- the value range of the 3 ⁇ 4 Umd e X may be 0 to the number of carriers D1-1 of the user equipment carrier aggregation, or the number of carriers D2- 1 that the user equipment can schedule in the EPDCCH set, where the schedulable carrier includes a sub-carrier A carrier that is activated and deactivated by the user equipment in the EPDCCH set p in frame k.
- the first number sequence of the sequence number is obtained according to the index of each carrier, Cellindex from small to large or from large to small, and the w cwx is the carrier index Cellindex at the first number.
- the numbered value in the sequence is obtained according to the index of each carrier, Cellindex from small to large or from large to small, and the w cwx is the carrier index Cellindex at the first number.
- the index Cellindex can be a carrier indicator or (Carrier Indicator)
- the value of Field, CIF which is configured by higher layer signaling to identify different carriers.
- the relative offset l md6X of the same numbered candidate between the respective carriers may be pre-configured on the base station or the UE as the number of the index Cellindex from small to large, since the first number sequence is like 0.
- the number interval is 1, so the interval between the EDPCCH candidates of the two carriers with the same aggregation level is 1.
- the CIF value is 6.
- a centralized EPDCCH set has 4 PRB pairs, each PRB pair has 4 ECCEs, and carrier 1's EDPCCH and carrier 2's EDPCCH have the same aggregation level L. 1.
- the number of EDCCH candidates for both carriers is 4.
- the first, second, third, and fourth EPDCCH candidates of the EDPCCH of carrier 1 are ECCE0, ECCE4, ECCE8, and ECCE12, respectively, and the first of the EDPCCH of carrier 2.
- the 2, 3, and 4 EPDCCH candidates are respectively ECCE1, ECCE5, ECCE9, and ECCE 13.
- the number of EDPCH candidates of the two carriers with the same aggregation level is the same, and the positions distributed in the EDPCCH resource set do not overlap, and the carrier 1 is
- the EPDCCH candidates of the carrier 2 are offset from each other. Therefore, when the EDPCH of each carrier is placed in the EPDCCH candidate, the EDCCH blocking is not caused, and the control information of the carrier 1 or the carrier 2 is prevented from being lost.
- the dUndex may be a value of the index Cellindex.
- the index Cellindex of the carrier is also the CIF value corresponding to each carrier, the CIF value of carrier 1 is 1, and the CIF value of carrier 2 is 6.
- the "cwx of the carrier 1 can be 1 and the "c ell index of the carrier 2 can be 6". Therefore, the relative offset between the EPDCCH candidates of the two carriers can also be implemented, and the EPDCCH candidates of the carriers with the same aggregation level can be avoided. Coincident problem.
- the determining the number of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex and the ECCE corresponding to each EPDCCH candidate includes: obtaining, corresponding to the mth EPDCCH candidate according to the following formula: ECCE:
- Equation 2 Equation 2 where, is a random value related to the subframe number k and the EPDCCH set index p,
- Both p and k are integers, which are aggregation levels of the UE in the EPDCCH resource set p
- the EPDCCH candidates of the respective carriers may be distributed as much as possible over the entire frequency bandwidth of the EPDCCH resource set.
- the ⁇ is a relative offset of the same numbered candidate between the respective carriers related to the index Cellindex.
- the value range of 0 to 41 U ⁇ is 0 to the number of carriers D1-1 of the user equipment carrier aggregation, or the number of carriers D2-1 that the user equipment can schedule in the EPDCCH set, and the schedulable carrier includes the subframe k A carrier activated and deactivated by the user equipment in the EPDCCH set p.
- n is obtained by the following method: the n is the number of carriers Q of the user equipment, or the n is the number of carriers that the user equipment can schedule in the EPDCCH set p, and the schedulable carrier includes a subframe.
- the number of carriers scheduled by the user equipment in the scheduling carrier corresponding to the EPDCCH set may be obtained; or n is a user.
- the system activates or deactivates the Q carriers by using MAC signaling.
- the UE does not receive and transmit data on this carrier.
- the base station also does not receive and transmit this UE data on this carrier.
- the UE does not receive the EPDCCH for the carrier, and the base station does not send the EPDCCH for the carrier to the UE.
- the activated carrier the UE receives and transmits data on the carrier, and the base station receives and transmits the UE data on the carrier. Meanwhile, the UE receives an EPDCCH for the carrier, and the base station also sends an EPDCCH for the carrier to the UE.
- the EPDCCH resource set there are four PBR pairs in one EPDCCH resource set, and two EPDCCHs are carried in the EPDCCH resource set, and carrier 1 and carrier 2 are cross-carrier scheduled.
- the EPDCCH aggregation levels of carrier 1 and carrier 2 are both 1, and the EPDCCHs of the two carriers have 4 candidate resources respectively, assuming 0, and the 1 2 3 4 candidate resources of the EDPCCH of carrier 1 are separated by another 'J is ECCE0 ECCE4 ECCE8 and ECCE12, EDPCCH carrier 2 1 2 3 4 1 J candidate resources to the other points and ECCE2 ECCE6 ECCE10 ECCE14.
- the number of candidate resources of the EDPCCH of the two carriers with the same aggregation level is the same, the positions distributed in the EDPCCH resource set do not overlap, and the total of 8 candidate resources of the two carriers can be evenly spaced, two The candidate resources of the carrier are distributed in the EDPCCH resource set, so that the EDPCCH blocking can be avoided, and the candidate resources are distributed over the entire frequency bandwidth as much as possible, and the gain of the frequency selective scheduling is obtained, and the transmission reliability of the EDPCCH is enhanced.
- the ⁇ is a relative offset of the same numbered candidate between the respective carriers related to the index Cellindex.
- the value range of 0 to 41 U ⁇ is 0 to the number of carriers D 1 1 of the user equipment carrier aggregation, or the number of carriers D 2 that the user equipment can schedule in the EPDCCH set, and the schedulable carrier includes the subframe k A carrier that is activated and deactivated by the user equipment at the EPDCCH set p.
- the n is the number of carriers Q of the user equipment, or the n is the number of carriers that the user equipment can schedule in the EPDCCH set p, and the schedulable carrier includes the user equipment in the subframe k in the EPDCCH set p Activated and deactivated carriers.
- the positions of the EPDCCH candidates with the same number of the different carriers may be allocated in a resource fast pair as much as possible.
- the carriers may be numbered according to the value of the CIF, and the index Cellindex of the carriers is obtained.
- the candidate level of the EDPCCH candidate with the number k of the EPCCH candidate of the carrier corresponding to the cell index of the carrier index L is the same as that of the other carrier group with the same aggregation level L of the carrier. Remove the negative sign.
- the number of ECCEs in one PRB pair is r
- the aggregation level of carrier 1 may be 1, 2, 4, 8, 16, or 32.
- r>L there may be qxr/L potential for a PRB pair for aggregation level L
- a potential EDPCCH candidate indicating that it can be selected as an EDPCCH candidate to be able to place one of the aggregation levels L
- ECCE0-ECCE3 belongs to the first PBR pair
- ECCE4-ECCE7 belongs to the second PBR pair
- ECCE8-ECCE11 belongs to the third PBR pair
- ECCE12-ECCE15 belongs to the fourth PBR pair.
- Carrier E and carrier 2 have the same EPDCCH aggregation level. If the EPDCCH corresponding to the EPDCCH of carrier 1 corresponds to the potential EDPCCH candidate of the first qxr/L/2 of one PRB pair, the ith EDPCCH candidate of carrier 2.
- the EPDCCH candidate determining method provided by the embodiment of the present invention when determining an EPDCCH candidate for carrying an EPDCCH, is configured to allocate a candidate offset between EPDCCH candidates of two carriers with the same aggregation level, which is the same as the aggregation level in the prior art.
- the EPDCCH candidates of the different carriers may be offset by the EPDCCH candidates of the carrier, so that the EPDCCH of each carrier can be successfully placed in the corresponding EPDCCH candidate, and the EPDCCH candidate overlap is prevented from causing partial EPDCCH to be discarded. Thereby avoiding EPDCCH blocking and improving the reliability of control information transmission.
- another embodiment of the present invention provides an application embodiment of a method for determining an EPDCCH candidate on a base station side, where the present embodiment is used to perform an EPDCCH resource set on one carrier.
- a user equipment UE transmits an EPDCCH of multiple carriers, and the UE may receive an EPDCCH of multiple carriers on one EPDCCH resource set.
- the method in this embodiment includes:
- the base station determines an EPDCCH candidate number of the aggregation level L of the carrier corresponding to the index, and an ECCE corresponding to each EPDCCH candidate, where the ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex.
- the base station sends the to-be-transmitted EPDCCH of the carrier corresponding to the index Cellindex in one of the determined multiple EPDCCH candidates.
- the EPDCCH to be transmitted is placed in one of the plurality of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex, and is sent to the UE.
- the UE may determine the EPDCCH candidate corresponding to each aggregation level by using different aggregation levels, and detect the EPDCCH to be transmitted from the determined EPDCCH candidates.
- the control information of the tth carrier is obtained from the correct EPDCCH.
- the UE does not detect the correct EPDCCH, the UE further determines the corresponding EPDCCH candidate by using other aggregation levels, and performs detection. Until the correct EPDCCH is detected, Or traversing the qxr ECCEs.
- the UE determines an EPDCCH candidate number of the aggregation level L of the carrier corresponding to the index, and an ECCE corresponding to each EPDCCH candidate, where the ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex.
- the UE detects the EPDCCH candidate corresponding to the aggregation level L of the carrier corresponding to the determined index Cellindex, and when the correct EPDCCH is detected, obtains the control information of the carrier corresponding to the index Cellindex from the correct EPDCCH.
- the correct EPDCCH is not detected, the other aggregation level is adopted, and the UE continues to determine the EPDCCH candidate corresponding to the aggregation level L of the carrier corresponding to the index Cellindex and performs detection until the correct EPDCCH is detected, or the qxr ECCEs are traversed. .
- the determining the EPDCCH candidate method when determining the candidate resource for carrying the EPDCCH, the candidate resources of the two carriers with the same aggregation level are separated by a candidate offset, which is the same as the aggregation level in the prior art.
- the candidate resources of the different carriers may be staggered, so that the EPDCCH of each carrier can be successfully placed in the corresponding candidate resources to avoid overlapping of candidate resources. Part of the EPDCCH is discarded, thereby avoiding EPDCCH blocking and improving the reliability of control information transmission.
- Another embodiment of the present invention provides an apparatus for determining an EPDCCH candidate, where an EPDCCH candidate on at least two carriers is located on an EPDCCH resource set on one of the at least two carriers, in an inter-carrier scheduling process,
- the device includes:
- a second determining unit 32 configured to determine an EPDCCH candidate number of an aggregation level L of a carrier corresponding to the index Cellindex, and an ECCE corresponding to each EPDCCH candidate in the EPDCCH resource set p determined by the first determining unit 31, where The ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex.
- the second determining unit 32 is further configured to obtain an ECCE corresponding to the mth EPDCCH candidate according to the following formula: ZL + 1
- ⁇ is a random value related to the subframe number k and the EPDCCH resource set p
- ⁇ ⁇ is a predefined candidate offset of the carrier corresponding to the index Cellindex
- the second determining unit 32 is further configured to obtain an ECCE corresponding to the mth EPDCCH candidate according to the following formula: modi N ECCEpk IL
- a random value related to the subframe number k and the EPDCCH set index p is corresponding to the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- the second determining unit 32 is further configured to obtain an ECCE corresponding to the mth EPDCCH candidate according to the following formula:
- a random value related to the subframe number and the EPDCCH set index p is the EPDCCH corresponding to the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- n is the number of carriers Q of the user equipment, or
- n is the number of carriers that the user equipment can schedule in the EPDCCH set p, and includes the carrier that is activated and deactivated by the user equipment in the EPDCCH set p in the subframe k.
- the 3 ⁇ 4 llmdra is a relative offset of the same numbered candidate between the respective carriers related to the index Cellindex; Wherein said 3 ⁇ 4llmdra ranges from 0 to the user equipment for carrier aggregation D1-1 number of carriers, or user equipment can be scheduled in the EPDCCH D2-1 number of carriers, the number of carriers that can be scheduled D2-1
- the carrier including the activation and deactivation of the user equipment in the EPDCCH set p in the subframe k is included.
- the cell index is from small to large or from large to small.
- the first number sequence of the sequence number is obtained from 0, and the ⁇ is the number value of the carrier index Cellindex in the first number sequence.
- the value of the index Cellindex is the value of the index Cellindex.
- the device for determining the EPDCCH candidate when determining the candidate resource for carrying the EPDCCH, the candidate resources of the two carriers with the same aggregation level are separated by a candidate offset, which is the same as the aggregation level in the prior art.
- the candidate resources of the different carriers may be offset, so that the EPDCCH of each carrier can be successfully placed in the corresponding candidate resources, and the partial resources are discarded due to the overlapping of candidate resources. Therefore, EPDCCH blocking is avoided, and the reliability of control information transmission is improved.
- Another embodiment of the present invention provides an apparatus for determining an EPDCCH candidate, where an EPDCCH candidate on at least two carriers is located on an EPDCCH resource set on one of the at least two carriers, in an inter-carrier scheduling process,
- the device includes:
- a memory 41 configured to store program code for determining an EPDCCH candidate
- the processor 42 is configured to read and run the program code stored in the memory 41, where the program code is configured to: determine the EPDCCH resource set p in the subframe k,
- the number of ECCEs in the EPDCCH resource set p, the labels of the N ECCE , p , , and ECCE are 0, 1, 2, ..., N £CC£i -1, respectively, and the aggregation level is L.
- One EPDCCH candidate of the EPDCCH corresponds to L consecutive ECECs, and one EPDCCH candidate can place one EPDCCH;
- the number of EPDCCH candidates for determining the aggregation level L of the carrier corresponding to the index Cellindex and the ECCE corresponding to each EPDCCH candidate include: obtaining the ECCE corresponding to the mth EPDCCH candidate according to the following formula: ZL + 1
- the ⁇ is a random value related to the subframe number k and the EPDCCH resource set p, where p and k are integers, and M) is the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- M Cellindex is a predefined candidate offset of the carrier corresponding to the index Cellindex
- the number of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex and the ECCE corresponding to each EPDCCH candidate are included, according to the following ECCE:
- a random value related to the subframe number k and the EPDCCH set index p is corresponding to the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- the number of EPDCCH candidates for determining the aggregation level L of the carrier corresponding to the index Cellindex and the ECCE corresponding to each EPDCCH candidate including obtaining the mth EP according to the following formula
- a random value related to the subframe number and the EPDCCH set index p is the EPDCCH corresponding to the aggregation level L of the user equipment UE corresponding to the EPDCCH candidate in the EPDCCH resource set p
- n is the number of carriers Q of the user equipment, or
- n is the number of carriers that the user equipment can schedule in the EPDCCH set p, and includes the carrier that is activated and deactivated by the user equipment in the EPDCCH set p in the subframe k.
- the 3 ⁇ 4 llmdra is a relative offset of the same numbered candidate between the respective carriers related to the index Cellindex;
- said 3 ⁇ 4llmdra ranges from 0 to the user equipment for carrier aggregation D1-1 number of carriers, or user equipment can be scheduled in the EPDCCH D2-1 number of carriers, the number of carriers that can be scheduled D2-1
- the carrier including the activation and deactivation of the user equipment in the EPDCCH set p in the subframe k is included.
- the first number sequence of the sequence number is obtained according to the index of each carrier, Cellindex from small to large or from large to small, and the frame is the carrier index Cellindex. The number value in the first numbered sequence.
- the value of the index Cellindex is the value of the index Cellindex.
- the device for determining the EDPCCH candidate when determining the candidate resource for carrying the EPDCCH, the candidate resources of the two carriers with the same aggregation level are separated by a candidate offset, which is the same as the aggregation level in the prior art.
- the candidate resources of the different carriers may be offset, so that the EPDCCH of each carrier can be successfully placed in the corresponding candidate resources, and the partial resources are discarded due to the overlapping of candidate resources. Therefore, EPDCCH blocking is avoided, and the reliability of control information transmission is improved.
- Another embodiment of the present invention provides a base station, in an inter-carrier scheduling process, where EPDCCH candidates on at least two carriers are located on one EPDCCH resource set on one of the at least two carriers, where the EPDCCH
- the base station includes the device for determining the EDCCH candidate as described in FIG. 3 or FIG. 4, and the transmitting device, and the device for determining the EPDCCH candidate is used to determine the location in the subframe k.
- One EPDCCH candidate of the EPDCCH with an aggregation level of L corresponds to L consecutive ECECs, one EPDCCH candidate can place one EPDCCH, and the number of EPDCCH candidates of the aggregation level L of the carrier corresponding to the index Cellindex is determined and corresponding to each EPDCCH candidate.
- ECCE where each EP of the aggregation level L
- the ECCE corresponding to the DCCH candidate is related to the index Cellindex;
- the sending device is configured to: send an EPDCCH in which the index Cellindex is a carrier of the carrier indication domain index Cellindex to one of the EPDCCH candidates determined by the device that determines the EPDCCH candidate.
- an EPDCCH candidate of the EPDCCH with an aggregation level of L corresponds to L consecutive ECECs, and one EPDCCH candidate can place one EPDCCH; determining an index corresponding to Cellindex The number of EPDCCH candidates of the aggregation level L of the carrier and the ECCE corresponding to each EPDCCH candidate, where the ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex;
- the receiving device is configured to detect an EPDCCH candidate determined by the device that determines the EPDCCH candidate, and when the correct EPDCCH is detected, obtain the first index Cellindex from the correct EPDCCH to be a carrier indication domain index Cellindex
- the control information of the carrier when the correct EPDCCH is not detected, indicates that the device that determines the EPDCCH candidate continues to use other aggregation levels to determine the number of EPDCCH candidates of other aggregation levels of the carrier corresponding to the index Cellindex and corresponding to each EPDCCH candidate. ECCE until the correct EPDCCH is detected, or the qxr ECCEs are traversed.
- the embodiment of the present invention further provides an EDPCCH transmission system, including the foregoing base station and UE in this embodiment.
- the UE, the base station, and the EDPCCH transmission system provided by the embodiments of the present invention when determining the candidate resources for carrying the EPDCCH, are separated by a candidate offset between the candidate resources of the two carriers with the same aggregation level, and are aggregated in the prior art.
- the candidate resources of the different carriers may be staggered, so that the EPDCCH of each carrier can be successfully placed in the corresponding candidate resources, and the candidate resources are prevented from being overlapped, so that some EPDCCHs are avoided. Discard, thereby avoiding EPDCCH blocking and improving the reliability of control information transmission.
- Another embodiment of the present invention provides a method for determining an ECSS resource, as shown in FIG. 5, including:
- the ECSS may be used for EPDCCH of a common control information, a random access response (RAR), or a multicast TPC Command.
- RAR random access response
- the location occupying the physical resource is a predefined location related to at least one of a physical cell ID, a virtual cell ID, a sub-slot slot number, and a system bandwidth, or with a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth. At least one related random location.
- the location of the physical resource occupied by the ECSS is a predefined location related to at least one of a physical cell ID, a virtual cell ID, a sub-slot slot number, and a system bandwidth.
- the location of the physical resource occupied by the ECSS is a predefined location related to at least one of a physical cell ID, a virtual cell ID, a sub-slot slot number, and a system bandwidth, and includes: a physical occupied by an ECSS of each cell. There is a fixed deviation between resource blocks, and the physical resource blocks occupied by ECSS under different sub-slot time slots or different physical or virtual cell IDs are different.
- the physical resource location occupied by the ECSS is:
- - 1 The number of the first physical resource block pair occupied by the ECSS of the k-1th child, ⁇ 1 .
- X is the virtual cell ID
- N is the number of physical resource blocks occupied by the ECSS
- i 0, l, ..., Nl
- N RB is the system bandwidth.
- the physical resource location occupied by the ECSS is:
- the location of the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth.
- Each physical resource occupied by ECSS is randomly generated.
- the first physical resource occupied by ECSS is randomly generated.
- the physical resource location occupied by the ECSS is:
- each physical resource block pair of the ECSS is determined by a cell-specific dynamic variable function such as a hash function, that is, each physical resource block pair of the ECSS is determined by a random function, and each sub-enthalpy dynamic can be determined. change.
- a cell-specific random function such as a hash function, randomly determines the starting position of the physical resource block pair of the eCSS, and then selects the interval at a time interval.
- the first physical resource occupied by the ECSS is:
- y t ((AY t _ 1 )modD)modJV RB
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth, including: It is divided into N groups of pre-defined resource groups that do not overlap each other.
- the resource group may be composed of one or more physical resource block pairs.
- the physical resources occupied by ECSS of different cells in different sub-networks are randomly selected from the resource group. Function determined with physical or virtual cell A random set of IDs, sub-slot time slots, and at least one of the system bandwidths.
- the N physical resource block pairs of each group satisfy the following relationship: traverse the entire system bandwidth; when the maximum bandwidth is selected, when the system bandwidth ⁇ can not be divisible by the number of physical resource blocks occupied by the ECSS, the maximum interval
- the selection is rounded up or down.
- the random function may be a hash function.
- the embodiment overcomes the design blind zone, implements interference coordination between cells and frequency domain diversity gain, and improves the reliability of EPDCCH common control information transmission.
- Another embodiment of the present invention further provides a device for determining an ECSS resource, as shown in FIG. 6, including:
- a third determining unit 61 configured to be configured by high layer signaling or determining a number N of physical resources occupied by the ECSS according to a predetermined rule;
- a fourth determining unit 62 configured to determine, according to the number N of physical resources occupied by the ECSS determined by the third determining unit 61, a location of a physical resource occupied by the ECSS, where the physical resources occupied by the ECSS are The location is a predefined location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth, or a random number associated with at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth position.
- the number N of physical resources occupied by the ECSS is related to the system bandwidth.
- the location of the physical resource occupied by the ECSS is a predefined location related to at least one of a physical cell ID, a virtual cell ID, a sub-slot slot number, and a system bandwidth.
- - 1 The number of the first physical resource block pair occupied by the ECSS of the k-1th child, ⁇ 1 .
- X is the virtual cell ID
- N RB is the system bandwidth.
- the physical resource location occupied by the ECSS determined by the fourth determining unit 62 is:
- Y k ,i ( — ⁇ ,, ⁇ + offset) mod N RB
- — u is the i-th physical resource block pair number occupied by the k-1th sub-element ECSS, which may be a virtual cell ID or a sub- ⁇ The slot number
- N RB is the system bandwidth.
- the physical resources occupied by the ECSS are physical or virtual cells.
- a random location associated with at least one of an ID, a sub-slot slot number, and a system bandwidth including:
- Each physical resource occupied by ECSS is randomly generated
- the first physical resource occupied by the ECSS is randomly generated.
- the physical resource location occupied by the ECSS determined by the fourth determining unit 62 is:
- Y kl ((A l - Y k _ ll ) mod D i ) mod N RB
- Yu x
- A A+i* offset ⁇
- A 9 g27
- N RB is the system bandwidth.
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth, and includes:
- the entire system bandwidth is divided into N groups of pre-defined resources that do not overlap each other.
- the physical resources occupied by ECSS of different cells in different sub-cells are physical or virtual cell IDs and sub-time slots determined by a random function in the resource group.
- the random function is a hash Hash function.
- the device for determining the ECSS resource provided by the embodiment of the present invention allocates the physical resource of the ECCS to the ECCS for transmitting the common control information, and the prior art does not have a method for the reasonable allocation of the physical resource occupied by the ECCS, so the present invention
- the embodiment overcomes the design blind zone, implements interference coordination between cells and frequency domain diversity gain, and improves the reliability of EPDCCH common control information transmission.
- Another embodiment of the present invention further provides an apparatus for determining an ECSS resource, as shown in FIG. include:
- a memory 71 configured to store program code for determining an ECSS resource
- the processor 72 is configured to read and run the program code stored in the memory 71, where the program code is configured to: configure, by high layer signaling, or determine a number of physical resources occupied by the ECSS according to a predetermined rule. ;
- Determining a location of the physical resource occupied by the ECSS where the location of the physical resource occupied by the ECSS is a predefined location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth, or A random location associated with at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth.
- the number N of physical resources occupied by the E C S S is related to the system bandwidth.
- the location of the physical resource occupied by the ECSS is a predefined location related to at least one of a physical cell ID, a virtual cell ID, a sub-slot slot number, and a system bandwidth, and includes:
- the physical resource location occupied by the ECSS determined by the processor is:
- - 1 The number of the first physical resource block pair occupied by the ECSS of the k-1th child, ⁇ 1 .
- X is the virtual cell ID
- N RB is the system bandwidth.
- the physical resource location occupied by the ECSS determined by the processor is:
- Y k ,i ( — ⁇ ,, ⁇ + offset) mod N RB
- the physical resource occupied by the ECSS is a random location related to at least one of a physical or virtual cell ID, a sub-slot slot number, and a system bandwidth, and includes:
- Each physical resource occupied by ECSS is randomly generated
- the first physical resource occupied by the ECSS is randomly generated.
- the physical resource location occupied by the ECSS determined by the processor is:
- Y kl ((A l -Y k _ ll )modD i )modN RB
- A 9 g27
- X is the virtual cell ID
- N RB is the system bandwidth.
- the first physical resource occupied by the ECSS determined by the processor is:
- Y k ((AY k _ l ) modD) modN RB
- X is the virtual cell ID
- A 39827
- N RB is the system bandwidth.
- the physical resources occupied by the ECSS are physical or virtual cells.
- a random location associated with at least one of an ID, a sub-slot slot number, and a system bandwidth including:
- the entire system bandwidth is divided into N groups of predefined resources that do not overlap each other.
- the physical resources occupied by ECSS of different cells in different sub-cells are the objects determined by the random function in the resource group.
- the random function is a hash hash function.
- the device for determining the ECSS resource provided by the embodiment of the present invention allocates the physical resource of the ECCS to the ECCS for transmitting the common control information, and the prior art does not have a method for the reasonable allocation of the physical resource occupied by the ECCS, so the present invention
- the embodiment overcomes the design blind zone, implements interference coordination between cells and frequency domain diversity gain, and improves the reliability of EPDCCH common control information transmission.
- an EPDCCH candidate of the EPDCCH with an aggregation level of L corresponds to L consecutive ECECs, and one EPDCCH candidate can place one EPDCCH; determining an index corresponding to Cellindex The number of EPDCCH candidates of the aggregation level L of the carrier and the ECCE corresponding to each EPDCCH candidate, where the ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex;
- the sending device is configured to: place an ECSS in the physical resource occupied by the ECSS determined by the device that determines the ECSS resource, and send the carrier after the ECSS is placed.
- the embodiment of the present invention further provides a UE, in an inter-carrier scheduling process, where EPDCCH candidates on at least two carriers are located on one EPDCCH resource set on one of the at least two carriers, where the EPDCCH
- an EPDCCH candidate of the EPDCCH with an aggregation level of L corresponds to L consecutive ECECs, and one EPDCCH candidate can place one EPDCCH; determining an index corresponding to Cellindex The number of EPDCCH candidates of the aggregation level L of the carrier and the ECCE corresponding to each EPDCCH candidate, where the ECCE corresponding to each EPDCCH candidate of the aggregation level L is related to the index Cellindex;
- the receiving device is configured to detect the ECSS in the physical resource occupied by the ECSS determined by the device that determines the ECSS resource, and parse the common control information of the cell.
- Another embodiment of the present invention further provides an ECSS transmission system, including the foregoing base station and UE in this embodiment.
- the base station, the UE, and the ECSS transmission system provided by the embodiments of the present invention allocate a physical resource of the ECCS to the ECCS that transmits the common control information, and no method in the prior art involves a reasonable allocation of the physical resources occupied by the ECCS.
- the embodiment of the invention overcomes the design blind zone, implements interference coordination between cells and frequency domain diversity gain, and improves the reliability of EPDCCH common control information transmission.
- the invention can be implemented by means of software plus the necessary general hardware, and of course also by hardware, but in many cases the former is a better implementation.
- the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
- a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
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Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
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RU2015134545A RU2608767C1 (ru) | 2013-01-18 | 2013-01-18 | Способ определения epdcch кандидата и устройство |
PCT/CN2013/070731 WO2014110817A1 (zh) | 2013-01-18 | 2013-01-18 | 一种确定epdcch候选的方法及设备 |
CN201380034021.9A CN104396325B (zh) | 2013-01-18 | 2013-01-18 | 一种确定epdcch候选的方法及设备 |
CN201910226107.0A CN110034910B (zh) | 2013-01-18 | 2013-01-18 | 一种确定epdcch候选的方法及设备 |
BR112015017187-7A BR112015017187B1 (pt) | 2013-01-18 | 2013-01-18 | Método e dispositivo de determinação de candidato a canal físico de controle de enlace de descida aprimorado epdcch, estação base e equipamento de usuário |
CN201910226652.XA CN109905223B (zh) | 2013-01-18 | 2013-01-18 | 一种确定epdcch候选的方法及设备 |
EP13871577.6A EP2938145B1 (en) | 2013-01-18 | 2013-01-18 | Method and device for determining epdcch candidate |
MX2015009255A MX360096B (es) | 2013-01-18 | 2013-01-18 | Método y dispositivo para determinar candidato de epdcch. |
CN201710923182.3A CN107682136B (zh) | 2013-01-18 | 2013-01-18 | 一种确定epdcch候选的方法及设备 |
US14/802,585 US9860896B2 (en) | 2013-01-18 | 2015-07-17 | EPDCCH candidate determining method and device |
US15/840,659 US10383123B2 (en) | 2013-01-18 | 2017-12-13 | Control channel candidate determining method and device |
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