WO2014117393A1 - Procédé de mappage de ressources et station de base - Google Patents

Procédé de mappage de ressources et station de base Download PDF

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Publication number
WO2014117393A1
WO2014117393A1 PCT/CN2013/071280 CN2013071280W WO2014117393A1 WO 2014117393 A1 WO2014117393 A1 WO 2014117393A1 CN 2013071280 W CN2013071280 W CN 2013071280W WO 2014117393 A1 WO2014117393 A1 WO 2014117393A1
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WO
WIPO (PCT)
Prior art keywords
cyclic
displacement value
cyclic displacement
particle group
sequence numbers
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PCT/CN2013/071280
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English (en)
Chinese (zh)
Inventor
张健
莫斯利·蒂姆
王轶
张翼
周华
Original Assignee
富士通株式会社
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Priority to PCT/CN2013/071280 priority Critical patent/WO2014117393A1/fr
Publication of WO2014117393A1 publication Critical patent/WO2014117393A1/fr

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Classifications

    • 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
    • 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
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • 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
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present invention relates to the field of communications, and in particular, to a resource mapping method and a base station of an enhanced physical downlink control channel.
  • the control channel is enhanced in LTE-A to meet the requirements of a new scenario such as a heterogeneous network, a multi-point cooperation, and a carrier aggregation, and is an Enhanced Physical Downlink Control Channel (EPDCCH).
  • EPDCCH Enhanced Physical Downlink Control Channel
  • EPDCCH is transmitted in a Physical Downlink Shared Channel (PDSCH) area; a physical resource block pair (PRB pair) to be used for EPDCCH transmission
  • PRB pair physical resource block pair
  • Each of the enhanced control channel elements (eCCEs) consists of four or eight eREGs, that is, each PRB pair contains 4, which is divided into 16 enhanced resource element groups (eREGs). Or 2 eCCEs; within a PRB pair, the eREG sequence is mapped to all resource element (RE, Resource Element) resources that do not contain demodulation reference signals (DM-RS).
  • DM-RS demodulation reference signals
  • Figure 1 shows the eREG resource mapping in the case of a regular cyclic prefix (CP, Cyclic Prefix) sub-frame with 4 eREGs per eCCE.
  • Figure 2 shows the mapping of eREG resources in the case of an eCCE with 8 eREGs in an extended CP subframe. All REs with the sequence number x in the figure constitute eREGx , where e ⁇ 0,l,2,...,15 ⁇ .
  • each eCCE size ie, the number of REs included in Figure 1 is 36, 36, 36, 36, respectively.
  • the embodiments of the present invention provide a resource mapping method and a base station, and the purpose is to ensure that each eCCE has almost the same number of REs when resource mapping is performed, and the difference in DCI transmission performance is reduced.
  • a resource mapping method is provided, which is applied to enhanced physical downlink control. Channel, the method includes:
  • the base station selects a cyclic shift value of ⁇ 2, 3 ⁇ , ⁇ 3, 2 ⁇ , ⁇ 3, 4 ⁇ or ⁇ for the enhanced resource particle group number in the OFDM symbol with sequence numbers 5 and 6 in the regular cyclic prefix subframe. 4, 3 ⁇ ;
  • mapping in each physical resource block pair, the sequentially numbered enhanced resource particle group number to the resource particle except the demodulation reference signal, and according to the cyclic shift value, the OFDM symbol in the regular cyclic prefix subframe
  • the enhanced resource particle group number is cyclically shifted.
  • a resource mapping method is provided, which is applied to an enhanced physical downlink control channel, where the method includes:
  • the base station selects a cyclic shift value of ⁇ 2, 3 ⁇ , ⁇ 3, 2 ⁇ , ⁇ 3, 4 ⁇ or ⁇ for the enhanced resource particle group number in the OFDM symbol with sequence numbers 12 and 13 in the regular cyclic prefix subframe. 4, 3 ⁇ ;
  • mapping within each physical resource block pair, the sequentially numbered enhanced resource particle group number to resource particles other than the demodulation reference signal, and according to the cyclic shift value, the OFDM symbol in the regular cyclic prefix subframe
  • the enhanced resource particle group number is cyclically shifted.
  • a resource mapping method is provided, which is applied to an enhanced physical downlink control channel, where the method includes:
  • the base station selects a first cyclic shift value and a second cyclic shift value respectively for the enhanced resource particle group number in the OFDM symbol with sequence numbers 9 and 10 in the regular cyclic prefix subframe; the first cyclic shift value and the first The absolute value of the difference between the two cyclic displacement values is an odd number between 0 and 12;
  • mapping within each physical resource block pair, the sequentially numbered enhanced resource particle group number to resource particles other than the demodulation reference signal, and according to the cyclic shift value, the OFDM symbol in the regular cyclic prefix subframe
  • the enhanced resource particle group number is cyclically shifted.
  • a resource mapping method is provided, which is applied to an enhanced physical downlink control channel, where the method includes:
  • the base station selects a third cyclic shift value and a second cyclic shift value respectively for the enhanced resource particle group number in the OFDM symbol with sequence numbers 8 and 10 in the regular cyclic prefix subframe; the third cyclic shift value and the first
  • the absolute value of the difference between the two cyclic displacement values is an odd number between 0 and 12;
  • mapping within each physical resource block pair, the sequentially numbered enhanced resource particle group number to resource particles other than the demodulation reference signal, and according to the cyclic shift value, the OFDM symbol in the regular cyclic prefix subframe
  • the enhanced resource particle group number is cyclically shifted.
  • a resource mapping method is provided, which is applied to an enhanced physical downlink control channel, where the method includes:
  • the base station selects a fourth cyclic shift value and a fifth cyclic shift value respectively for the enhanced resource particle group number in the OFDM symbol with sequence numbers 4 and 5 in the extended cyclic prefix subframe; the fourth cyclic shift value and the first
  • the absolute value of the difference between the five cyclic displacement values is an odd number between 0 and 12;
  • the sequentially numbered enhanced resource particle group number is mapped to the demodulation reference And a resource particle outside the signal, and cyclically shifting the sequence of the enhanced resource particle group in the OFDM symbol of the extended cyclic prefix subframe according to the cyclic shift value.
  • a resource mapping method is provided, which is applied to an enhanced physical downlink control channel, where the method includes:
  • the base station selects a sixth cyclic shift value and a seventh cyclic shift value respectively for the enhanced resource particle group number in the OFDM symbol with sequence numbers 7 and 8 in the extended cyclic prefix subframe; the sixth cyclic shift value and the first
  • the absolute value of the difference between the seven cyclic displacement values is an odd number between 0 and 12;
  • the enhanced resource particle group number is cyclically shifted.
  • a resource mapping method is provided, which is applied to an enhanced physical downlink control channel, where the method includes:
  • the base station selects an eighth cyclic shift value and a ninth cyclic shift value respectively for the enhanced resource particle group number in the OFDM symbol with sequence numbers 10 and 11 in the extended cyclic prefix subframe; the eighth cyclic shift value and the first
  • the absolute value of the difference between the nine cyclic displacement values is an odd number between 0 and 12;
  • the enhanced resource particle group number is cyclically shifted.
  • a base station is provided, where the base station includes:
  • the selection unit selects the cyclic displacement values ⁇ 2, 3 ⁇ , ⁇ 3, 2 ⁇ , ⁇ 3, 4 ⁇ for the enhanced resource particle group numbers in the OFDM symbols with sequence numbers 5 and 6 in the regular cyclic prefix subframe. Or ⁇ 4, 3 ⁇ ; or, for the enhanced resource particle group number in the OFDM symbol with sequence numbers 12 and 13 in the regular cyclic prefix subframe, respectively, the cyclic displacement values are selected as ⁇ 2, 3 ⁇ , ⁇ 3, 2 ⁇ , ⁇ 3, 4 ⁇ or ⁇ 4, 3 ⁇ ; or, for the enhanced resource particle group number in the OFDM symbol with sequence numbers 9, 10 in the regular cyclic prefix subframe, respectively selecting the first cyclic shift value And a second cyclic displacement value; an absolute value of the difference between the first cyclic displacement value and the second cyclic displacement value is an odd number between 0 and 12; or, for the conventional cyclic prefix subframe, the serial number is 8 The enhanced resource particle group number in the OFDM symbol of 10, respectively selecting the third cyclic shift value and the second
  • mapping unit in each Within the physical resource block pair, the sequentially numbered enhanced resource particle group number is mapped to resource particles other than the demodulation reference signal, and the enhanced type in the OFDM symbol of the regular cyclic prefix subframe according to the cyclic shift value
  • the resource particle group number is cyclically shifted.
  • a base station is provided, where the base station includes:
  • a selecting unit for selecting an enhanced resource particle group number in the OFDM symbol with sequence numbers 4 and 5 in the extended cyclic prefix subframe, respectively selecting a fourth cyclic shift value and a fifth cyclic shift value; the fourth cyclic shift value and the The absolute value of the difference between the fifth cyclic displacement values is an odd number between 0 and 12; or, before the expansion cycle An enhanced resource particle group number in an OFDM symbol with sequence numbers 7 and 8 in the suffix frame, respectively selecting a sixth cyclic shift value and a seventh cyclic shift value; the sixth cyclic shift value and the seventh cyclic shift value The absolute value of the difference is an odd number between 0 and 12; or, for the enhanced resource particle group number in the OFDM symbol with sequence numbers 10 and 11 in the extended cyclic prefix subframe, the eighth cyclic shift value is selected and a ninth cyclic displacement value; an absolute value of a difference between the eighth cyclic displacement value and the ninth cyclic displacement value is an odd number between 0 and 12.
  • mapping unit in each physical resource block pair, mapping the sequentially numbered enhanced resource particle group number to resource particles other than the demodulation reference signal, and performing the extended cyclic prefix subframe OFDM according to the cyclic shift value
  • the enhanced resource particle group number within the symbol is cyclically shifted.
  • a communication system comprising a base station as described above.
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to perform a resource mapping method as described above in the base station.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a resource mapping method as described above in a base station.
  • the beneficial effects of the embodiments of the present invention are: by selecting a cyclic shift value for an OFDM symbol in which a CSI-RS may occur, cyclically shifting the sequence of the enhanced resource particle group in the OFDM symbol according to the cyclic shift value, thereby ensuring each eCCE during resource mapping. Having almost the same number of REs, reducing the difference in DCI transmission performance
  • FIG. 2 is a schematic diagram of an extended CP subframe in the prior art
  • FIG. 3 is a diagram showing an example of an impact on eREG mapping in a 4-port CSI-RS configuration
  • Figure 4 is a schematic diagram of the use of cyclic displacement in the prior art
  • FIG. 5 is a flowchart of a resource mapping method according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of an eREG position after performing cyclic shift according to Embodiment 1 of the present invention
  • FIG. 7 is another flowchart of a resource mapping method according to Embodiment 1 of the present invention
  • FIG. 9 is another schematic diagram of the eREG position after cyclic shift according to Embodiment 1 of the present invention.
  • FIG. 10 is a schematic diagram of a CSI-RS position in a conventional CP subframe of frame structure type 2;
  • FIG. 11 is another flowchart of a resource mapping method according to Embodiment 1 of the present invention.
  • FIG. 12 is another schematic diagram of the position of the eREG after cyclic shifting according to Embodiment 1 of the present invention
  • FIG. 13 is a schematic diagram of the position of the eREG after conditional combination according to Embodiment 1 of the present invention
  • FIG. 14 is a schematic diagram of the position of the eREG after the conditional combination of Embodiment 1 of the present invention
  • Figure 17 is a schematic diagram showing the position of the eREG after the conditional combination of the embodiment 2 of the present invention.
  • Figure 18 is a block diagram showing the structure of the base station according to the third embodiment of the present invention. detailed description
  • CSI-RS channel state information reference signals
  • Channel State Information Channel State Information
  • resource mapping may not guarantee that each eCCE has the same number of REs.
  • Figure 3 is a diagram showing an example of the impact on eREG mapping in a 4-port CSI-RS configuration.
  • a 4-port CSI-RS (4-port CSI-RS) appears in a regular CP subframe. Since the RE occupied by the CSI-RS cannot be used by the EPDCCH, the size of the eCCEO to eCCE3 becomes 36. 34, 36, 34, thus making the eCCE size unbalanced.
  • a cyclic shift can be introduced for each OFDM symbol based on the current eREG/eCCE partition. For example, let the cyclic shift equal the number of the OFDM symbol.
  • Figure 4 is a schematic illustration of the use of cyclic displacement in the prior art.
  • the value of the cyclic displacement here The range is 0 ⁇ 11.
  • the method can ensure that the REs used by each 2-port CSI-S are from two different eCCEs, so that the eCCE size imbalance problem can be alleviated to some extent.
  • there is still an eCCE imbalance for 4-port CSI-RS configurations, there is still an eCCE imbalance.
  • the number of REs included in eCCEO to lj eCCE3 is 36, 34, 34, 36 in order, so there is still room for optimization.
  • the embodiment of the invention provides a resource mapping method, which is applied to resource mapping of an EPDCCH.
  • the embodiment of the present invention uses a conventional CP subframe as an example to describe the resource mapping method of the present invention in detail.
  • FIG. 5 is a flowchart of a resource mapping method according to an embodiment of the present invention. As shown in FIG. 5, the method includes: Step 501: An enhanced type in an OFDM symbol with sequence numbers 5 and 6 in a regular cyclic prefix subframe. Resource particle group number, select the cyclic displacement value as ⁇ 2, 3 ⁇ or ⁇ 3, 2 ⁇ , or ⁇ 3, 4 ⁇ , or ⁇ 4, 3 ⁇ respectively;
  • Step 502 In each physical resource block pair, map the sequentially numbered enhanced resource particle group number to the resource particle except the demodulation reference signal, and then perform enhancement on the regular cyclic prefix subframe OFDM symbol according to the cyclic shift value.
  • the type of the resource particle group is cyclically shifted.
  • all sequentially numbered enhanced resource particle group numbers may be mapped to resource particles other than the DM-RS in the order of the prior frequency.
  • the OFDM symbol number in a regular CP subframe it can be divided into 14 columns from 0 to 13, and each column includes 12 REs.
  • resource particles in OFDM symbols with sequence numbers 5 and 6 a portion is occupied by the DMRS.
  • the specific content can refer to the prior art.
  • the cyclic shift values can be selected separately.
  • the selected cyclic shift value can be ⁇ 2, 3 ⁇ or ⁇ 3, 2 ⁇ , or ⁇ 3, 4 ⁇ , or ⁇ 4, 3 ⁇ .
  • the enhanced resource particle group number in the OFDM symbol with sequence number 5 selects a cyclic shift value of 2
  • the enhanced resource particle group number in the OFDM symbol with sequence number 6 may select a cyclic shift value of 3; or, the sequence number is
  • the enhanced resource particle group number selection within the OFDM symbol of 5 selects a cyclic shift value of 4, and the enhanced resource particle group number in the OFDM symbol with sequence number 6 can select a cyclic shift value of 3.
  • the base station may cyclically shift the sequence number of the enhanced resource particle group in some OFDM symbols of the regular CP subframe according to the selected cyclic shift value.
  • the available resource particles are resource particles other than the DMRS occupying resource particles.
  • the enhanced resource particle group number is mapped to the available resource particles, and then the enhanced resource particle group number is cyclically shifted according to the selected cyclic displacement value.
  • FIG. 6 is a schematic diagram of the eREG position after cyclic shift according to an embodiment of the present invention. For simplicity, only the available resource particles in the OFDM symbols with sequence numbers 5 and 6 are shown, and the resource particles occupied by the DMRS are not shown. As shown in Figure 6, the box shows the possible locations of the CSI-RS.
  • the OFDM symbol of sequence number 5 has a cyclic shift value of 2, and the OFDM symbol of sequence number 6 has a cyclic shift value of 3.
  • the OFDM symbol number 5 has a cyclic shift value of 3, and the OFDM symbol number 6 has a cyclic shift value of 2.
  • the OFDM symbol number 5 has a cyclic shift value of 3, and the OFDM symbol number 6 has a cyclic shift value of 4.
  • D In the case, the OFDM symbol with sequence number 5 has a cyclic shift value of 4, and the OFDM symbol with sequence number 6 has a cyclic shift value of 3.
  • the above method differs from the method shown in FIG. 4 in that the four REs used by the 4-port CSI-RS in FIG. 4 are only from two different eCCEs (eCCEl, eCCE2), and the method of FIG. 5 can satisfy each 4-
  • the port CSI-RS occupies REs from 4 different eCCEs. Therefore, for a configuration in which the PRB pair includes four eCCEs, the present invention comprehensively considers the influence of the 4-port CSI-RS condition on the eCCE size when selecting the cyclic shift.
  • FIG. 7 is another flowchart of a resource mapping method according to an embodiment of the present invention.
  • the method includes: Step 701: A base station enhances an OFDM symbol with sequence numbers 12 and 13 in a regular cyclic prefix subframe. Type resource particle group number, select the cyclic displacement value as ⁇ 2, 3 ⁇ or ⁇ 3, 2 ⁇ , or ⁇ 3, 4 ⁇ , or ⁇ 4, 3 ⁇ respectively;
  • Step 702 In each physical resource block pair, map the sequentially numbered enhanced resource particle group sequence number to resource particles other than the demodulation reference signal, and then perform enhancement on the regular cyclic prefix subframe OFDM symbol according to the cyclic shift value.
  • the type of the resource particle group is cyclically shifted.
  • all sequentially numbered enhanced resource particle group numbers may be mapped to resource particles other than the DM-RS in the order of the pre-frequency. Similar to the method shown in FIG. 5, for OFDM symbols of sequence numbers 12 and 13, it is also possible to select a cyclic shift value of ⁇ 2, 3 ⁇ or ⁇ 3, 2 ⁇ , or ⁇ 3, 4 ⁇ , or ⁇ 4, 3, respectively. ⁇ .
  • FIG. 8 is another flowchart of the resource mapping method according to the embodiment of the present invention.
  • the method includes: Step 801: The base station is in an OFDM symbol with sequence numbers 9 and 10 in a regular cyclic prefix subframe. An enhanced resource particle group number, respectively selecting a first cyclic displacement value and a second cyclic displacement value; wherein an absolute value of a difference between the first cyclic displacement value and the second cyclic displacement value is an odd number between 0 and 12;
  • Step 802 In each physical resource block pair, map the sequentially numbered enhanced resource particle group number to resource particles other than the demodulation reference signal, and then perform enhancement on the regular cyclic prefix subframe OFDM symbol according to the cyclic shift value.
  • the type of the resource particle group is cyclically shifted.
  • all sequentially numbered enhanced resource particle group numbers may be mapped to resource particles other than the DM-RS in the order of the pre-frequency.
  • the absolute difference between x and y is the set ⁇ 1
  • Figure 9 is another schematic diagram of the eREG position after cyclic shifting in accordance with an embodiment of the present invention, wherein for simplicity, only available resource particles within the OFDM symbols of sequence numbers 9, 10 are shown.
  • Figure 9 shows an example of the cyclic shift of the eREG sequence number in the OFDM symbol with sequence numbers 9, 10.
  • the cyclic shift values used by the OFDM symbols of sequence numbers 9, 10 may be 0, 1 respectively; or 0, 3; or 0, 5; or 0, 7; or 0, 9 ; or 0, 11. It is to be noted that Fig. 9 only schematically shows the case of the cyclic displacement, but the invention is not limited thereto.
  • the CSI-RS considered above is applicable to the frame structure type 1 and the frame structure type 2.
  • 10 is a schematic diagram of CSI-RS locations in a regular CP subframe of frame structure type 2, and for a CSI-RS only for frame structure type 2, a possible CSI-RS location is shown in FIG.
  • the cyclic shift is determined according to the OFDM symbol number, it can be seen from FIG. 10 that the RE occupied by the 4-port CSI-RS is only from two different eCCEs, and thus the ideal effect is not achieved.
  • FIG. 11 is another flowchart of a resource mapping method according to an embodiment of the present invention. As shown in FIG. 11, the method includes:
  • Step 1101 The base station selects a third cyclic shift value and a second cyclic shift value for the eREG sequence numbers in the OFDM symbols with sequence numbers 8 and 10 in the regular cyclic prefix subframe, where the third cyclic shift value and the second cyclic shift value are respectively selected.
  • the absolute value of the difference is an odd number between 0 and 12.
  • Step 1102 In each physical resource block pair, map the sequentially numbered enhanced resource particle group number to resource particles other than the demodulation reference signal, and then perform enhancement on the regular cyclic prefix subframe OFDM symbol according to the cyclic shift value.
  • the type of the resource particle group is cyclically shifted.
  • all sequentially numbered enhanced resource particle group numbers may be mapped to resource particles other than the DM-RS in the order of the pre-frequency.
  • the following conditions can also be added: Assuming that the cyclic displacement used by the OFDM symbols 8, 10 is 2, y, the absolute value of the difference between 2 and y is a set. Elements in ⁇ 1, 3, 5, 7, 9, 11 ⁇ .
  • FIG. 12 is another schematic diagram of the eREG position after cyclic shift according to an embodiment of the present invention.
  • the eCCE mapping may use a cyclic shift of 3 for each OFDM symbol (symbols 8, 10) that may occur in the CSI-RS. 0, that is, the condition described in FIG. 11 is satisfied.
  • the REs occupied by any 4-port CSI-RS are derived from 4 different eCCEs, so the above conditions are used to constrain the eCCE size.
  • the above only describes the cyclic shift of the eREG sequence number of the OFDM symbol number 5, 6, or 12, 13, or 9, 10, or 8, 10 respectively.
  • the cyclic shift may be performed in combination with several or all of the cases.
  • the prior art may be used, and a specific implementation manner may be determined according to actual conditions.
  • FIG. 13 is a schematic diagram of an eREG position after conditional combination according to an embodiment of the present invention. As shown in Figure 13 It is shown that for OFDM symbols (5, 6, 12, 13, 8, 9, 10) that may occur in CSI-RS, the cyclic shift selection satisfies the conditions in Figs. 5, 7, 8, and 11.
  • the OFDM symbol number 5 has a cyclic shift value of 3, and the sequence number is
  • the OFDM symbol selection of 6 has a cyclic shift value of 2.
  • the OFDM symbol numbered 12 has a cyclic shift value of 2
  • the OFDM symbol number 13 has a cyclic shift value of 3.
  • the OFDM symbol with sequence number 9 has a cyclic shift value of 1
  • the OFDM symbol with sequence number 10 has a cyclic shift value of 0, and the absolute value of the difference between the two is 1.
  • the serial number is 8.
  • the OFDM symbol selection cyclic shift value is 3, the OFDM symbol numbered 10 has a cyclic shift value of 0, and the absolute value of the difference between the two is 3.
  • the resource particles corresponding to the OFDM symbols may still be selected according to the cyclic shift equal to the OFDM symbol number.
  • the cyclic shift value can be chosen to be 8.
  • the present invention is still applicable to CSI-RS and the like.
  • the present invention is also applicable.
  • the RE used in the 2-port CSI-RS is from two different eCCEs; the RE used in the 4-port CSI-RS is from four different The eCCE; 8-port CSI-RS uses RE from 4 different eCCEs. This makes it possible to obtain an eCCE size that is as uniform as possible.
  • the embodiment of the invention provides a resource mapping method, which is applied to resource mapping of an EPDCCH.
  • the resource mapping method of the present invention is described in detail in the embodiment of the present invention by using the extended CP subframe as an example, and the same content as the first embodiment will not be described again.
  • FIG. 14 is a flowchart of a resource mapping method according to an embodiment of the present invention.
  • the method includes: Step 1401: For an eREG sequence number in an OFDM symbol with sequence numbers 4 and 5 in an extended cyclic prefix subframe, Selecting a fourth cyclic displacement value and a fifth cyclic displacement value respectively; wherein an absolute value of a difference between the fourth cyclic displacement value and the fifth cyclic displacement value is an odd number between 0 and 12;
  • Step 1402 In each physical resource block pair, map the sequentially numbered enhanced resource particle group number to resource particles other than the demodulation reference signal, and then perform enhancement on the extended cyclic prefix subframe OFDM symbol according to the cyclic shift value.
  • the type of the resource particle group is cyclically shifted.
  • FIG. 15 is another flowchart of a resource mapping method according to an embodiment of the present invention.
  • the method includes: Step 1501: A base station selects an eREG in an OFDM symbol with sequence numbers 7 and 8 in an extended cyclic prefix subframe. a serial number, a sixth cyclic displacement value and a seventh cyclic displacement value are respectively selected; wherein an absolute value of a difference between the sixth cyclic displacement value and the seventh cyclic displacement value is an odd number between 0 and 12;
  • Step 1502 In each physical resource block pair, map the sequentially numbered enhanced resource particle group number to resource particles other than the demodulation reference signal, and then perform enhancement on the extended cyclic prefix subframe OFDM symbol according to the cyclic shift value.
  • the type of the resource particle group is cyclically shifted.
  • FIG. 16 is another flowchart of the resource mapping method according to the embodiment of the present invention.
  • the method includes: Step 1601: The base station selects an eREG sequence number in an OFDM symbol with sequence numbers 10 and 11 in an extended cyclic prefix subframe. And selecting an eighth cyclic displacement value and a ninth cyclic displacement value respectively; wherein an absolute value of a difference between the eighth cyclic displacement value and the ninth cyclic displacement value is an odd number between 0 and 12;
  • Step 1602 In each physical resource block pair, map the sequentially numbered enhanced resource particle group number to the resource particle except the demodulation reference signal, and then perform enhancement on the extended cyclic prefix subframe OFDM symbol according to the cyclic shift value.
  • the type of the resource particle group is cyclically shifted.
  • step 1402 in each physical resource block pair, all sequentially numbered enhanced resource particle group numbers may be mapped to the DM in the order of the prior frequency. - Resource particles outside the RS.
  • each PRB pair contains only two eCCEs
  • RE resources from two different eCCEs can be used as long as any CSI-RS configuration is satisfied.
  • the possible OFDM symbols are 4, 5, 10, 11; for CSI-RS only applicable to Frame Structure Type 2, its possible OFDM The symbols are 7, 8. Therefore, satisfying the conditions in Fig. 14, 15 or 16, it is guaranteed that each eCCE has the same number of REs when the resource is mapped.
  • FIG. 17 is a schematic diagram of resource particles after conditional combination according to an embodiment of the present invention. As shown in Fig. 17, for the OFDM symbols (4, 5, 7, 8, 10, 11) that may appear in the CSI-RS, the cyclic shift selection satisfies the conditions in Figs. 14, 15, and 16.
  • the embodiment of the present invention provides a base station, which corresponds to the method described in Embodiment 1 or 2, and the same content is not described again.
  • FIG. 18 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in FIG. 18, the base station 1800 includes: The unit 1801 and the mapping unit 1802 are selected. Other parts of the base station 1800 can refer to the prior art.
  • the selecting unit 1801 selects cyclic shift values of ⁇ 2, 3 ⁇ , ⁇ 3, 2 for the eREG sequence numbers in the OFDM symbols of sequence numbers 5 and 6 in the regular CP subframe, respectively. ⁇ , ⁇ 3, 4 ⁇ or ⁇ 4, 3 ⁇ ;
  • the cyclic shift values are selected as ⁇ 2, 3 ⁇ , ⁇ 3, 2 ⁇ , ⁇ 3, 4 ⁇ , or ⁇ 4, 3 ⁇ . ;
  • the third cyclic shift value and the second cyclic shift value are respectively selected; wherein the difference between the third cyclic shift value and the second cyclic shift value is The absolute value is an odd number between 0 and 12;
  • the mapping unit 1802 maps, in each physical resource block pair, all sequentially numbered enhanced resource particle group numbers to the resource particles except the demodulation reference signal in the order of the first frequency and then the regular CP according to the cyclic displacement value.
  • the enhanced resource particle group number within the frame OFDM symbol is cyclically shifted.
  • the selecting unit 1801 selects a fourth cyclic shift value and a fifth cyclic shift value respectively for the eREG sequence numbers in the OFDM symbols of sequence numbers 4 and 5 in the extended CP subframe;
  • the absolute value of the difference between the fourth cyclic shift value and the fifth cyclic shift value is an odd number between 0 and 12; or, for the eREG sequence number in the OFDM symbol of sequence number 7, 8 in the extended CP subframe, respectively, the sixth is selected.
  • a cyclic displacement value and a seventh cyclic displacement value wherein an absolute value of a difference between the sixth cyclic displacement value and the seventh cyclic displacement value is an odd number between 0 and 12;
  • the mapping unit 1802 maps, in each physical resource block pair, all sequentially numbered enhanced resource particle group numbers to resource particles other than the demodulation reference signal in the order of the first frequency, and then expands the CP according to the cyclic displacement value.
  • the enhanced resource particle group number within the frame OFDM symbol is cyclically shifted.
  • the embodiment of the present invention further provides a communication system, which includes the base station as described in Embodiment 3.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to execute the resource mapping method as described in Embodiment 1 or 2 above in the base station.
  • An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a resource mapping method as described in Embodiment 1 or 2 above in a base station.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

Abstract

Des modes de réalisation de la présente invention se rapportent à un procédé de mappage de ressources et à une station de base. Une valeur de décalage cyclique est sélectionnée par la station de base pour un symbole OFDM (symbole de multiplexage par répartition de fréquence orthogonale) dans lequel un signal CSI-RS (signal de référence d'informations d'état de canal) peut être présent, et un décalage cyclique est réalisé sur un certain nombre de séquences d'un groupe d'éléments de ressources améliorés dans le symbole OFDM selon la valeur de décalage cyclique, chaque élément de canal de contrôle amélioré (eCCE) pouvant être assuré d'avoir à peu près le même nombre d'éléments de ressource dans le mappage des ressources tandis que la différence des performances de transmission des informations de commande de liaison descendante (DCI) est réduite.
PCT/CN2013/071280 2013-02-01 2013-02-01 Procédé de mappage de ressources et station de base WO2014117393A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101247382A (zh) * 2008-03-25 2008-08-20 中兴通讯股份有限公司 基于ofdm系统的分布式传输资源映射方法和装置
CN101911577A (zh) * 2007-10-29 2010-12-08 爱立信电话股份有限公司 Ofdm系统中的控制信道数据分配方法
CN102511191A (zh) * 2009-10-02 2012-06-20 松下电器产业株式会社 无线通信装置及无线通信方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101911577A (zh) * 2007-10-29 2010-12-08 爱立信电话股份有限公司 Ofdm系统中的控制信道数据分配方法
CN101247382A (zh) * 2008-03-25 2008-08-20 中兴通讯股份有限公司 基于ofdm系统的分布式传输资源映射方法和装置
CN102511191A (zh) * 2009-10-02 2012-06-20 松下电器产业株式会社 无线通信装置及无线通信方法

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