Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L1/00—Arrangements for detecting or preventing errors in the information received
  • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
  • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
  • H04L1/0026—Transmission of channel quality indication
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/20—Control channels or signalling for resource management
  • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
• • 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 signalling, 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
  • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
  • H04L5/0094—Indication of how sub-channels of the path are allocated
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/04—Wireless resource allocation
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
  • Y02D30/00—Reducing energy consumption in communication networks
  • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

• the present invention relates to the field of wireless communication technologies. More particularly, the present invention relates to a method of transmitting/receiving a physical downlink channel of a serving cell and a base station/user equipment. Background technique
• LTE Long Term Evolution
• 3GPP 3rd Generation Partnership Project
• OFDMA orthogonal frequency division multiple access
• MIMO multiple antenna
• CA carrier aggregation
• HetNet heterogeneous network
• the type referred to as a low-cost MTC UE, supports the MTC service in all duplex modes of the existing LTE network and has such performance: 1) single receive antenna; 2) downlink and uplink
• TBS maximum transmission module
• the maximum transmission module (TBS) is 1000 bits; 3) the baseband bandwidth of the downlink data channel is reduced to 1.4 MHz, the bandwidth of the downlink control channel is consistent with the bandwidth of the network side system, the uplink channel bandwidth and the downlink
• the RF portion is consistent with the user equipment in the existing LTE network.
• MTC is a data communication service that does not require human involvement.
• Large-scale deployment of MTC user equipment can be used in security, tracking, billing, measurement, and consumer electronics applications, including video surveillance, supply chain tracking, smart meters, remote monitoring, and more.
• MTC requires lower power consumption, supports lower data transmission rates and lower mobility.
• the LTE system is mainly aimed at human-to-human (H2H) communication services. Therefore, to realize the scale competitive advantage and application prospect of MTC services, the key link is that LTE networks can support low-cost MTC devices. Work at low cost.
• MTC equipment needs to be installed in the basement of a residential building or protected by a thick wall of insulating foil, metal window or traditional building. Compared to conventional equipment terminals (such as mobile phones, tablets, etc.) in LTE networks, these devices are airborne. The interface will obviously suffer from more severe penetration losses. 3GPP decided to study the scheme design and performance evaluation of LTE network to provide additional 20dB coverage enhancement service for MTC equipment. It is worth noting that MTC equipment located in poor network coverage area has such characteristics: very low data transmission rate, very loose delay Requirements, and limited mobility.
• the LTE network can further optimize some signaling and/or channels to support MTCo 3GPP requirements for new defined low cost UEs and other UEs running MTC services (eg, very loose latency requirements).
• LTE network coverage enhancements which provide 15dB of network coverage enhancement for LTE Frequency Division Duplex (FDD) networks.
• FDD Frequency Division Duplex
• the data channel is 1.4MHz (ie, 6 RBs)
• the control channel can still access the entire downlink system bandwidth, and the RF link part remains unchanged. That is, the entire system bandwidth can be accessed; for the uplink, the baseband portion and the radio frequency portion remain unchanged.
• the receiving antenna of the low-cost MTC user equipment is a single antenna, and the largest uplink transmission module and the downlink transmission module are both 1000 bits.
• the data channel baseband of the downlink is 6 RBs
• the data channel is fixed at 6 RBs near the DC carrier frequency
• the PDSCH frequency domain selective scheduling of the low-cost MTC device will be affected, gp, low-cost MTC device It will be difficult to obtain a frequency domain selective gain. Therefore, how to ensure the frequency domain selective gain of low-cost MTC equipment is a problem that needs to be solved by the 3GPP standardization organization when standardizing MTC work items.
• the design of the downlink control channel is a challenge because the PDCCH needs to take into account the normal operation of the LTE REL-8/9/10/11 regular user equipment, the scrambling sequence of the PDCCH. It is related to the cell ID number and the subframe number, and the PDCCH region is dynamically changed from subframe to subframe.
• the PDCCH start frame sequence number and its repetition number are determined. And how to avoid the limitation of PCFICH/PHICH and realize the merging of multi-subframe PDCCH is a problem to be solved.
• the PDSCH needs repeated transmission of multiple subframes, how to inform the starting frame number of the PDSCH and the number of repetitions of the PDSCH at this time.
• the MTC user equipment is a problem that needs to be solved.
• the timing relationship between the PDCCH and the PDSCH also needs to be redefined. Summary of the invention
• the present invention proposes a PDCCH transmission/reception mechanism and PDSCH frequency domain selectivity for an MTC user equipment (including a low-cost UE and other UEs performing delay tolerant MTC services and requiring certain network coverage enhancement).
• Gain acquisition According to the present invention, the starting frame number, the starting subframe, and the number of repetitions of the PDCCH are set according to the coverage enhancement level required by the MTC user equipment. Then, configure the DCI parameters that need to override the enhanced MTC user. In DCI, the timing relationship between PDCCH and PDSCH can be added.
• Each of the low-cost MTC user equipments may be configured with RRC signaling not to exceed the maximum downlink data RB resources supported by the UE for reception of the PDSCH/EPDCCH.
• a method performed by a base station including: acquiring a coverage enhancement level of a user equipment UE; determining, according to a coverage enhancement level of the UE, physical downlink control channel PDCCH configuration information of the UE; An enhancement level, determining physical downlink shared channel PDSCH configuration information of the UE; and modifying downlink control information DCI configuration parameters to increase PDCCH configuration information and PDSCH configuration information.
• the PDCCH start frame number SFN, the start subframe 1 and the number of repetitions N of the UE are determined according to the coverage enhancement level of the UE.
• the PDSCH start frame number and the number of repetitions of the UE are determined according to the coverage enhancement level of the UE.
• determining the PDSCH configuration information of the UE includes: sending a channel quality indicator CQI measurement command to the user equipment UE; receiving a CQI measurement result from the UE; and determining, according to the CQI measurement result, a physical resource used by the UE to receive the PDSCH Piece.
• the number of physical resource blocks used by the UE to receive the PDSCH is not greater than the maximum downlink data bandwidth supported by the UE.
• the starting subframe of the PDSCH is fixed to the last k subframes of the corresponding PDCCH, and the number of repetitions of the PDSCH is associated with the coverage enhancement level of the UE.
• the user equipment is an inter-machine communication MTC user equipment.
• PDCCH configuration information and PDSCH configuration information are configured by radio resource control RRC signaling.
• the timing relationship between the PDCCH and the PDSCH is changed, and the PDSCH is scheduled in advance, that is, the PDCCH carries the scheduling information of the PDSCH in the subsequent subframes.
• a method performed by a user equipment comprising: receiving a channel quality indicator CQI measurement command from a base station, and performing CQI measurement; reporting to the base station a best specific number of sub-band positions of the CQI Information and CQI values of the sub-bands; and receiving physical downlink control channel PDCCH configuration information and physical downlink shared channel PDSCH configuration information sent by the base station.
• the PDCCH configuration information and the PDSCH configuration information are related to an coverage enhancement level of the user equipment.
• the user equipment is an inter-machine communication MTC user equipment.
• the user equipment if the user equipment does not require coverage enhancement, the user equipment periodically reports to the base station a particular number of sub-band location information of the CQI and the CQI values of the sub-bands.
• a base station including: an obtaining unit, configured to acquire a coverage enhancement level of a user equipment UE; and a first determining unit configured to: determine, according to a coverage enhancement level of the UE, a UE Physical downlink control channel PDCCH configuration information; the second determining unit is configured to: determine physical downlink shared channel (PDSCH) configuration information of the UE according to the coverage enhancement level of the UE; and modify the unit, configured to modify the downlink control information DCI configuration parameter to The PDCCH configuration information and the PDSCH configuration information are added.
• PDSCH physical downlink shared channel
• the first determining unit is configured to: determine, according to the coverage enhancement level of the UE, a PDCCH start frame number SFN and a repetition number N of the UE.
• the first determining unit is configured to: determine a PDCCH start frame number SFN, a start subframe i, and a repetition number N of the UE according to the coverage enhancement level of the UE.
• the second determining unit is configured to: determine a PDSCH starting frame number, a starting subframe, and a repetition number of the UE according to the coverage enhancement level of the UE.
• the second determining unit is configured to: send a channel quality indicator CQI measurement command to the user equipment UE; receive a CQI measurement result from the UE; and determine, according to the CQI measurement result, a physical resource used by the UE to receive the PDSCH Piece.
• the number of physical resource blocks used by the UE to receive the PDSCH is not greater than the maximum downlink data bandwidth supported by the UE.
• the second determining unit is configured to fix the starting subframe of the PDSCH to the last k subframes of the corresponding PDCCH, and the number of repetitions of the PDSCH is associated with the coverage enhancement level of the UE.
• a user equipment comprising: a channel quality indicator CQI unit configured to receive a CQI measurement command from a base station and perform CQI measurement; and a reporting unit configured to report the CQI to the base station a specific number of subband location information and CQI values of the subbands; and a receiving unit configured to receive physical downlink control channel PDCCH configuration information and physical downlink shared channel PDSCH configuration information sent by the base station, the PDCCH configuration information and the PDSCH The configuration information is related to the coverage enhancement level of the user equipment.
• the user equipment is an inter-machine communication MTC user equipment.
• the reporting unit is configured to: if the user equipment does not require coverage enhancement, periodically report to the base station a particular number of sub-band location information of the CQI and the CQI values of the sub-bands.
• FIG. 1 is a schematic diagram showing a location distribution of an MTC user equipment in an LTE cell
• FIG. 2 is a schematic diagram showing a PDCCH processing procedure in an LTE network
• FIG. 3 is a flow chart showing a method performed by a base station according to an embodiment of the present invention
• FIG. 4 is a diagram showing an overlay enhanced MTC user equipment according to an embodiment of the present invention.
• FIG. 5 is a schematic diagram showing a default downlink subframe structure of a low-cost MTC user equipment according to an embodiment of the present invention
• FIG. 6 is a schematic diagram showing a structure of a downlink subframe of a low-cost MTC user equipment RRC configuration according to an embodiment of the present invention
• Figure 7 is a flow chart showing a method performed by a user equipment according to an embodiment of the present invention
• Figure 8 is a block diagram showing a base station according to an embodiment of the present invention
• Figure 9 shows a block diagram of a user equipment in accordance with an embodiment of the present invention. detailed description
• the present invention proposes (requires additional coverage enhancement or no additional coverage enhancement) low-cost MTC user equipment and other MTC services supporting delay tolerance and requiring certain coverage of enhanced user equipment.
• the PDCCH information transmission/reception method, the base station, and the user equipment (UE) are described in detail. It should be noted that the present invention should not be limited to the specific embodiments described below. In addition, detailed descriptions of well-known techniques that are not directly related to the present invention are omitted for the sake of brevity to avoid obscuring the understanding of the present invention.
• the coverage enhancement level of this area is the highest, and the uplink/downlink physical layer channel requires the most time-frequency resources.
• each downlink subframe is divided into a control region and a data region, gP, and a first half of each subframe is used for transmitting a PDCCH, occupying one, two or three OFDM Symbol (For the case where the system bandwidth is 1.4 MHz, the size of the PDCCH region is 2, 3 or 4 OFDM symbols), in the case of carrier aggregation (CA), each carrier has a PDCCH region.
• the area size of the PDCCH is dynamically changed from subframe to subframe to adapt to instantaneous transmission traffic. For example, if there are fewer users to be scheduled in one subframe, less control signaling is required.
• the control regions of subframe 1 and subframe 6 are at most 2 OFDM symbols because the primary synchronization signal occupies the third OFDM symbol of subframe 1 and subframe 6.
• the control region whose PDCCH is the largest is limited to 2 OFDM symbols.
• Multiple PDCCHs may be simultaneously transmitted in a downlink control region of one subframe.
• the PDCCH is mainly used to transmit downlink control information (DCI), such as scheduling instructions and power control commands. As shown in FIG.
• DCI downlink control information
• each DCI message is suffixed with a 16-bit cyclic check code (CRC), and the Radio Network Terminal Identity (RNTI) is included in the CRC calculation process, that is, implicitly indicates the transmission RNTI.
• CRC cyclic check code
• RNTI Radio Network Terminal Identity
• Different RNTIs are used according to different purposes of the DCI message, for example, for normal unicast data transmission, terminal-specific C-RNTI is adopted.
• the terminal device uses the designated RNTI to check the CRC. If the CRC check passes, it indicates that the DCI is correctly received.
• the LTE system takes a 1/3 rate tail-bit convolutional coding of the transmission bits, and a rate matching algorithm to accommodate the time-frequency resources of the PDCCH transmission.
• the rate-matched coded bits take a cell-specific and subframe-specific scrambling code sequence to randomize inter-cell interference, followed by a four-phase phase shift keying (QPSK) modulation scheme.
• QPSK phase shift keying
• resource particle (RE) mapping of multiple PDCCHs adopts a specific control channel particle CCE structure, wherein the CCE includes 9 resource particle groups (REGs), and each REG contains 4 REs. That is, each CCE is composed of 36 REs.
• a specific PDCCH may be composed of one, two, four, or eight CCEs.
• the PDCCH adopts multiple CCEs, which can compensate Unfavorable channel conditions.
• the number of CCEs included in one PDCCH is called the aggregation level (AL).
• Another consideration in CCE design is randomization and frequency diversity of inter-cell interference.
• LTE adopts cell-specific interleaving technology to divide all QPSK symbols in a CCE into groups, each group containing symbols, and then these QPSK symbols. Groups are interwoven. Different The zone adopts a uniform interleaver, but with different displacements, the displacement is an integer multiple, and finally
• the CCE is mapped to the RE, first mapped from the frequency domain, and then mapped in the time domain.
• the PDCCH adopts a hierarchical indication method, that is, a physical layer control format indication channel (PCFICH) is adopted to indicate the control region size (the number of OFDM symbols) of the PDCCH, and reading the PCFICH is a prerequisite for all users to successfully read the PDCCH.
• PCFICH physical layer control format indication channel
• the PDCCH and Physical Layer Broadcast Channel (PBCH) are configured with the same antenna port (AP).
• FIG. 3 shows a flow chart of a method performed by a base station in accordance with an embodiment of the present invention. As shown in Figure 3, method 30 begins at step S300.
• step S310 an coverage enhancement level of the user equipment UE is obtained.
• the physical downlink control channel PDCCH configuration information of the UE is determined according to the coverage enhancement level of the UE.
• the PDCCH in the coverage enhancement level CEJ MTC user equipment may be transmitted in one subframe, and the number of CCEs (i.e., AL) may be greater than 8 (e.g., 16, 32, etc.). These CCEs can end in one sub-frame and then repeat in some subsequent sub-frames. Repeat transmission in multiple subframes is allowed for the PDCCH at the coverage enhancement level CEJ MTC user equipment.
• the PDCCH is allowed to repeatedly transmit the PDCCH of the MTC user equipment in a subframe having a different subframe number.
• the PDCCH is allowed to repeatedly transmit the PDCCH of the MTC user equipment in a subframe having the same subframe number (i.e., only one subframe in each radio frame).
• the PDCCH is repeatedly transmitted in the subframe slot x in SFN ⁇ SFN+N X -1 .
• the starting frame number (including the starting subframe number) of the PDCCH that needs to be covered by the enhanced MTC user equipment and the number of repetitions may be configured through RRC signaling, or may be configured according to the RRC connection before the establishment. Define the configuration.
• the physical downlink shared channel PDSCH configuration information of the UE is determined according to the coverage enhancement level of the UE.
• the PDSCH start subframe may be fixed to the next subframe of the last transmission of the corresponding PDCCH, and the number of repetitions of the PDSCH is associated with the coverage level £ in which it is located.
• the downlink control information DCI configuration parameter is modified to increase PDCCH configuration information and PDSCH configuration information.
• a coverage level CEJ MTC user equipment It can simplify/decrease the load of its DCI format 1A (such as fixing its modulation and coding scheme (MCS), fixing its transmission mode (TM), reducing the hybrid automatic request retransmission process, fixed redundancy version (RV), etc.) to reduce The number of CRC bits.
• MCS modulation and coding scheme
• TM transmission mode
• RV fixed redundancy version
• the maximum downlink RB allocation can be limited to 6 RBs.
• the timing relationship between the PDCCH and the corresponding PDSCH may be added, such as the number of repetitions of the PDSCH and its starting subframe, and the scheduling information of the PDSCH.
• Figures 5 and 6 illustrate the downlink subframe structure of a low cost MTC user equipment.
• the low-cost MTC user equipment can read the control area of the entire carrier bandwidth, while the data channel can only read 1.4MHz (that is, the bandwidth of 6 RBs). This is because the baseband frequency domain width of the downlink data channel is fixed at 1.4 MHz, the RF bandwidth is still the entire downlink system bandwidth, and the baseband and RF bandwidth of the control channel are the entire system bandwidth.
• the PDSCH is uniformly fixed to 6 RBs, the PDSCH frequency domain selective gain of the low-cost MTC user equipment is limited.
• the uplink of the low-cost MTC user equipment remains unchanged, consistent with the user equipment of the existing LTE system.
• the low-cost MTC user equipment uses a single receive antenna whose maximum and maximum transport blocks are limited to 1000 bits.
• Figure 5 shows the default configuration of a low-cost MTC user equipment.
• the PDSCH is fixed at 6 RBs near the DC carrier.
• Figure 6 shows the configuration of a low cost MTC user equipment utilizing frequency domain selective gain. Specifically, the six RBs in FIG. 6 are RBs with a large channel gain of the low-cost MTC user equipment.
• the eNB performs dynamic scheduling (in this case, it is necessary to change the timing relationship between the PDCCH and the PDSCH, such as scheduling a PDSCH in advance by several TTIs), or may pass RRC signaling.
• dynamic scheduling in this case, it is necessary to change the timing relationship between the PDCCH and the PDSCH, such as scheduling a PDSCH in advance by several TTIs
• RRC is preferred for semi-static configuration.
• the specific RRC configuration process is as follows:
• the low-cost MTC user equipment receives the CQI measurement command sent by the eNB, starts the aperiodic sub-band CQI feedback (the transmission mode is TM1, the CQI mode is 2-0), and feeds the CQI measurement result to the eNB through the PUSCH.
• the low-cost MTC user equipment measures the PRB group (including n consecutive PRBs) based on the CRS reference signal of the downlink full bandwidth control region, wherein the size of the PRB (ie, the value of «) and which PRB group performs CQI measurement , are all semi-statically configured by the eNB.
• the eNB configures m PRBs for PDSCH/EPDCCH reception by using the RRC signaling to the MTC user equipment according to the CQI reported by the low-cost MTC user equipment, where m ⁇ 6.
• the information particles (IE) of RRC signaling can be, for example:
• resourceBlockConfig-MTC-rl2:: BIT STRING (SIZE(1..31))
• This value is indicated to a specific combination of 6 PRBs for the MTC UE.
• Deriving the size of the resourceBlockConfig-MTC-r 12 based on the value of the dl-Bandwidth If the low-cost MTC user equipment does not need coverage enhancement, the MTC user equipment periodically reports the RRC configured m (m ⁇ 6 RB CQI measurement, eNB Further, the PDSCH/EPDCCH of the MTC user equipment is scheduled. If the low-cost MTC user equipment needs coverage enhancement, the MTC user does not need to periodically report the CQI, because the mobility of such users is very limited, the MTC is in a long time. The channel conditions experienced by the user equipment are limited, so the PRB information configured by the RRC is continuously used.
• Table 7.2.3.1 in 3GPP TS36.213 can be improved in the CQI sequence number table of the low-cost MTC user equipment.
• the 3-bit CQI table is adopted, the CQI sequence number is selected from 1 to 8, and the number of repetitions of a PDSCH is increased (the specific value is based on the actual value). The situation is determined), as shown in the following table:
• the PDCCH configuration may be predefined according to the required coverage enhancement level. (Including the starting frame and the number of repetitions, as shown in Figure 4).
• the PDSCH configuration information is included in the DCI. At this stage, the PDSCH is transmitted in 6 RBs near the downlink DC carrier.
• the eNB After the RRC connection is established, the eNB triggers the low-cost MTC user equipment to measure/report the CQI for the low-cost MTC user equipment that needs to be covered and the other user equipment that needs to cover the enhanced running MTC service (where the CQI measurement is based on the control region) CRS reference signal). Then, the eNB can configure a maximum of 6 RBs for each MTC user equipment for PDSCH reception through RRC signaling. At this time, the start frame and the number of repetitions of the PDSCH can be modified within the DCI.
• the PDCCH configuration (including the starting frame and the number of repetitions of the PDCCH) at this time can be reconfigured or the system pre-defined configuration can be used.
• method 30 ends at step S350.
• FIG. 7 shows a flow chart of a method performed by a user equipment in accordance with an embodiment of the present invention. As shown in Figure 7, method 70 begins at step S700.
• step S710 the channel quality indicator CQI measurement command is received from the base station, and the CQI is executed.
• the base station reports the CTXI best specific number of subband position information and the CQI values of the subbands. If the user equipment does not require coverage enhancement, the user equipment can periodically report to the base station a particular number of sub-band location information of the CQI and the CQI values of the sub-bands. If the user equipment needs coverage enhancement, the user does not need to periodically report the CQI. Since the mobility of such users is very limited, the channel conditions experienced by the user equipment are limited for a long time, so the PRB information configured by the RRC is continuously used.
• step S730 the physical downlink control channel PDCCH configuration information and the physical downlink shared channel PDSCH configuration information sent by the base station are received, where the PDCCH configuration information and the PDSCH configuration information are related to the coverage enhancement level of the user equipment.
• method 70 ends at step S740.
• Figure 8 shows a block diagram of a base station in accordance with an embodiment of the present invention.
• the base station 80 includes an obtaining unit 810, a first determining unit 820, a second determining unit 830, and a modifying unit 840.
• the obtaining unit 810 may be configured to acquire a coverage enhancement level of the user equipment UE.
• the first determining unit 820 may be configured to determine physical downlink control channel PDCCH configuration information of the UE according to a coverage enhancement level of the UE.
• the first determining unit 820 may be configured to determine a PDCCH start frame number SFN and a repetition number N of the UE according to a coverage enhancement level of the UE.
• the second determining unit 830 may be configured to determine the physical downlink shared channel PDSCH configuration information of the UE according to the coverage enhancement level of the UE. For example, the second determining unit may be configured to determine the PDSCH starting frame number and the number of repetitions of the UE according to the coverage enhancement level of the UE. Preferably, the second determining unit may be configured to: send a channel quality indicator CQI measurement command to the user equipment UE; receive the CQI measurement result from the UE; and determine, according to the CQI measurement result, a physical resource block used by the UE to receive the PDSCH.
• Modification unit 840 can be configured to modify downlink control information DCI configuration parameters to add PDCCH configuration information and PDSCH configuration information.
• Figure 9 shows a block diagram of a user equipment in accordance with an embodiment of the present invention.
• the user equipment 90 includes a channel quality indicator CQI unit 910, a reporting unit 920, and a receiving unit 930.
• the CQI unit 910 can be configured to receive CQI measurement commands from the base station and perform CQI measurements.
• the reporting unit 920 can be configured to report to the base station a particular number of sub-band location information that is best for the CQI and the CQI values for the sub-bands.
• the reporting unit 920 can be further configured to: if the user equipment does not require coverage enhancement, periodically report to the base station a particular number of sub-band location information of the CQI and the CQI values of the sub-bands. If the user equipment needs coverage enhancement, the user does not need to periodically report the CQI. Since the mobility of such users is very limited, the channel conditions experienced by the user equipment are limited for a long time, so the PRB information configured by the RRC is continuously used.
• the receiving unit 930 is configured to receive physical downlink control channel PDCCH configuration information and physical downlink shared channel PDSCH configuration information that are sent by the base station, where the PDCCH configuration information and the PDSCH configuration information are related to the coverage enhancement level of the user equipment.
• the PDCCH information of the downlink physical layer PDCCH process information of the MTC user equipment of the serving cell proposed by the present application is implemented, and the PDCCH information for allowing the base station to send the serving cell and the low frequency MTC user equipment to obtain the frequency domain selective gain are implemented. It can also implement PDCCH/PDSCH enhancement when covering enhanced MTC applications. Using the technical solution proposed by the present application, It can improve the resource utilization of LTE to support MTC user equipment and improve spectrum/energy efficiency, and reduce time/frequency resource conflict between cells.
• the above-described embodiments of the present invention can be implemented by software, hardware, or a combination of both software and hardware.
• the base station and various components within the user equipment in the above embodiments may be implemented by various devices including, but not limited to, analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, and programmable processing. , Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), Programmable Logic Devices (CPLDs), and more.
• ASICs Application Specific Integrated Circuits
• FPGAs Field Programmable Gate Arrays
• CPLDs Programmable Logic Devices
• base station refers to a mobile communication data and control switching center having a large transmission power and a relatively large coverage area, including resource allocation scheduling, data reception and transmission, and the like.
• user equipment refers to a user mobile terminal, for example, a terminal device including a mobile phone, a notebook, etc., which can perform wireless communication with a base station or a micro base station.
• embodiments of the invention disclosed herein may be implemented on a computer program product.
• the computer program product is a product having a computer readable medium encoded with computer program logic that, when executed on a computing device, provides related operations to implement The above technical solution of the present invention.
• the computer program logic When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of the present invention.
• Such an arrangement of the present invention is typically provided as software, code and/or other data structures, such as one or more, disposed or encoded on a computer readable medium such as an optical medium (e.g., CD-ROM), floppy disk, or hard disk.
• Software or firmware or such a configuration may be installed on the computing device such that one or more processors in the computing device perform the technical solutions described in the embodiments of the present invention.

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• 2013
  • 2013-08-06 CN CN201310339122.9A patent/CN104348580A/zh active Pending
• 2014
  • 2014-08-06 JP JP2016532227A patent/JP6386045B2/ja active Active
  • 2014-08-06 WO PCT/CN2014/083808 patent/WO2015018342A1/zh not_active Ceased
  • 2014-08-06 US US14/910,214 patent/US10674494B2/en active Active

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