[go: up one dir, main page]

CN104935402B - The method, apparatus and equipment that subband CQI is reported are carried out in LC-MTC user equipmenies - Google Patents

The method, apparatus and equipment that subband CQI is reported are carried out in LC-MTC user equipmenies Download PDF

Info

Publication number
CN104935402B
CN104935402B CN201410109877.4A CN201410109877A CN104935402B CN 104935402 B CN104935402 B CN 104935402B CN 201410109877 A CN201410109877 A CN 201410109877A CN 104935402 B CN104935402 B CN 104935402B
Authority
CN
China
Prior art keywords
sub
cqi
bands
user equipment
mtc user
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201410109877.4A
Other languages
Chinese (zh)
Other versions
CN104935402A (en
Inventor
陈宇
黄晟峰
马修·贝克
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Shanghai Bell Co Ltd
Alcatel Optical Networks Israel Ltd
Original Assignee
Nokia Shanghai Bell Co Ltd
Alcatel Optical Networks Israel Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Shanghai Bell Co Ltd, Alcatel Optical Networks Israel Ltd filed Critical Nokia Shanghai Bell Co Ltd
Priority to CN201410109877.4A priority Critical patent/CN104935402B/en
Publication of CN104935402A publication Critical patent/CN104935402A/en
Application granted granted Critical
Publication of CN104935402B publication Critical patent/CN104935402B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/001—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A kind of method that progress subband CQI is reported in LC MTC user equipmenies is provided, wherein, the network that the LC MTC user equipmenies are currently located does not support LC MTC to be configured, and this method includes the following steps：A. configuration is reported based on current CQI, determines to need the candidate subband into the multiple subbands and multiple subband that base station reports, wherein, the quantity of candidate's subband is no more than the number of sub-bands upper limit that the LC MTC user equipmenies are supported；B. the CQI deviations of the candidate subband are set as higher CQI deviations, the CQI deviations of other subbands in the multiple subband is set as relatively low CQI deviations；C., the CQI deviations of set the multiple subband are reported to the base station belonging to the user equipment.Scheme according to the present invention, can in traditional network more effective scheduling bandwidth limited users equipment.

Description

Method, device and equipment for sub-band CQI reporting in LC-MTC user equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for reporting sub-band CQI in LC-MTC user equipment.
Background
In the prior art, typically, the PDCCH is received in the first few (e.g. the first 1 to 3) OFDM symbols in a user equipment subframe, and then the PDSCH PRB of interest is received in the following OFDM symbols in the same subframe. Since the UE cannot immediately decode the PDCCH, it needs to store a full-bandwidth-value PRB so that it can decode the PDSCH after decoding the PDCCH. This places certain requirements on the bandwidth of the user equipment. If the bandwidth of the ue is less than the full bandwidth value to be stored, a situation may occur in which data cannot be correctly received or transmitted on the LC-MTC ue.
However, in certain situations, the bandwidth of the user equipment may be limited, for example, to reduce the cost, and in some situations, the bandwidth usage of the user equipment may be limited. Then when the bandwidth-limited ues operate in the existing legacy network, the ues operating in the range of the existing legacy network, such as release11 and the network before the existing legacy network, will default to full-bandwidth devices, i.e. devices with unlimited bandwidth. Therefore, due to the limited bandwidth, the bandwidth-limited ue operating in such existing legacy networks often cannot completely receive or store the related information on all physical resource blocks, so that the bandwidth-limited ue may not receive or transmit data correctly.
Disclosure of Invention
The invention aims to provide a method, a device and equipment for sub-band CQI reporting in LC-MTC user equipment.
According to an aspect of the present invention, a method for sub-band CQI reporting in an LC-MTC user equipment is provided, wherein a network in which the LC-MTC user equipment is currently located does not support LC-MTC configuration, and the method includes the following steps:
a. determining a plurality of sub-bands needing to be reported to a base station and candidate sub-bands in the sub-bands based on the current CQI reporting configuration, wherein the number of the candidate sub-bands does not exceed the upper limit of the number of the sub-bands supported by the LC-MTC user equipment;
b. setting the CQI bias of the candidate sub-band to a higher CQI bias, and setting the CQI bias of the other sub-bands in the plurality of sub-bands to a lower CQI bias;
c. and reporting the set CQI deviations of the plurality of sub-bands to a base station to which the user equipment belongs.
According to another aspect of the present invention, there is provided a reporting apparatus for reporting sub-band CQI in an LC-MTC user equipment, wherein a network in which the LC-MTC user equipment is currently located does not support LC-MTC configuration, the reporting apparatus includes the following apparatus:
a determining device, configured to determine, based on a current CQI reporting configuration, a plurality of sub-bands that need to be reported to a base station and candidate sub-bands in the plurality of sub-bands, where the number of the candidate sub-bands does not exceed an upper limit of a number of sub-bands supported by the LC-MTC user equipment;
setting means for setting the CQI bias for the candidate subband to a higher CQI bias and the CQI bias for the other subbands in the plurality of subbands to a lower CQI bias;
and a sending device, configured to report the set CQI offset of the multiple subbands to a base station to which the ue belongs.
According to another aspect of the present invention, there is also provided an LC-MTC user equipment, including the reporting apparatus in the present invention.
Compared with the prior art, the invention has the following advantages: 1) according to the scheme of the embodiment, the LC-MTC user equipment can enable the base station to be more inclined to select the candidate sub-band with higher CQI by setting the CQI deviation of the reported sub-bands, so that the sub-bands scheduled by the base station when the base station transmits data to the LC-MTC user equipment are reduced in the existing traditional network, and the possibility that the data is lost or cannot be normally transmitted due to the limited bandwidth of the LC-MTC user equipment in the existing traditional network is reduced; preferably, when the CQI offset of the candidate sub-band is set to be the highest and the CQI offsets of other sub-bands are set to be the lowest, the probability that the base station selects the candidate sub-band can be further increased, so that the probability that the LC-MTC user equipment loses data or cannot normally transmit data due to bandwidth limitation in the existing conventional network is further reduced; 3) when the CQI reporting mode selects the sub-band for the LC-MTC user equipment, the situation that the base station schedules too many sub-bands (namely the sub-bands exceeding the upper limit of the number of the sub-bands supported by the LC-MTC user equipment) can be better avoided by limiting the number of the sub-bands reported by the LC-MTC user equipment; moreover, when the CQI reporting mode is that the base station configures sub-bands and the number of the sub-bands specified to be reported by the base station exceeds the upper limit of the number of the sub-bands supported by the LC-MTC user equipment, the advantage of reducing the sub-bands scheduled when the base station transmits data to the LC-MTC user equipment by setting the CQI deviation of the sub-bands is more obvious; 4) the communication quality can be improved by selecting the sub-band with higher actual CQI as a candidate sub-band; 5) by allowing the skipping of OFDM symbols in the same subframe during the decoding of PDCCH and recovering the skipped OFDM symbols, cross-subframe scheduling can be avoided, and the scheduling complexity is greatly reduced; 6) the LC-MTC user equipment can update the candidate sub-band in the sub-band reported to the base station according to the actual scheduling condition of the LC-MTC user equipment by the base station, so that the scheduling possibility and effectiveness of the LC-MTC user equipment can be increased. For example, when the candidate sub-band determined by the LC-MTC user equipment is a sub-band reserved by the base station for other purposes, the base station will not schedule the LC-MTC user equipment on the candidate sub-band, and the scheme of this embodiment may avoid the LC-MTC user equipment from being scheduled by updating the candidate sub-band.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic flow chart of a method for reporting sub-band CQI in LC-MTC user equipment according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for sub-band CQI reporting in an LC-MTC user equipment according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a reporting apparatus for reporting sub-band CQI in an LC-MTC user equipment according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a reporting apparatus for reporting sub-band CQI in an LC-MTC user equipment according to another embodiment of the present invention.
The same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
Fig. 1 is a flowchart illustrating a method for reporting sub-band CQI in an LC-MTC (Low Cost machine type communication, Low Cost MTC) user equipment according to an embodiment of the present invention. The method of the embodiment is mainly implemented by LC-MTC user equipment, which may be any user equipment supporting LC-MTC, such as a smart meter. In the scenario of this embodiment, the network where the LC-MTC user equipment is currently located does not support LC-MTC configuration; the LC-MTC ue may determine whether a network where the LC-MTC ue is currently located supports LC-MTC configuration by reading a System Information Block (SIB).
It should be noted that the LC-MTC ue is only an example, and other existing or future LC-MTC ues may be applicable to the present invention, and shall be included in the scope of the present invention and is included by reference.
In order to more clearly illustrate the scheme of the present invention, the following description is made for LC-MTC and LC-MTC user equipment:
M2M (Machine to Machine) communication is also called MTC (Machine type communication). In order to reduce the cost of MTC user equipment, the 3GPP proposes the concept of LC-MTC. In LC-MTC, the device performing machine type communication is an LC-MTC user equipment, and as a preferred example, the LC-MTC user equipment generally has at least one of the following features:
1) with one receiving antenna.
It should be noted that, since the LC-MTC ue only has one receiving antenna, the CQI reporting mode of the LC-MTC ue will not be configured by the base station as broadband reporting.
2) The maximum uplink and downlink TBS (Transport block size) for unicast is limited, e.g., not more than 1000 bits.
3) The bandwidth is limited, that is, the LC-MTC user equipment can only perform signaling or data processing within a smaller bandwidth, that is, the LC-MTC user equipment only supports a certain number of PRBs (Physical Resource blocks).
For example, the bandwidth of the LC-MTC user equipment may be set to 1.4MHz, where the LC-MTC user equipment may support a maximum of 6 PRBs.
The method according to the present embodiment includes step S1, step S2, and step S3.
In step S1, the LC-MTC user equipment determines, based on the current CQI reporting configuration, a plurality of sub-bands that need to be reported to the base station and candidate sub-bands in the plurality of sub-bands, where the number of the candidate sub-bands does not exceed the upper limit of the number of sub-bands supported by the LC-MTC user equipment.
And the base station can realize the CQI reporting configuration by sending a message to LC-MTC user equipment. The message sent by the base station for performing CQI reporting configuration for the LC-MTC user equipment may include multiple types. For example, the message sent by the base station to the LC-MTC user equipment includes but is not limited to:
RRCConnectionSetup (RRC connection establishment);
RRCConnectionReestablishment (RRC connection reestablishment);
RRCConnectionReconfiguration (RRC connection reconfiguration), and the like.
The CQI reporting configuration can be used for indicating a CQI reporting mode of LC-MTC user equipment; the CQI reporting method mainly includes: 1) the base station configures sub-bands, namely the base station specifies the number of the sub-bands needing to be reported by the LC-MTC user equipment, for example, the CQI reporting configuration indicates that the base station specifies that the LC-MTC user equipment reports the CQI of 5 sub-bands to the base station; 2) the LC-MTC user equipment selects the sub-band, namely the user equipment selects the quantity of the sub-band which needs to be reported by the user equipment.
Wherein each subband comprises a plurality of PRBs. For example, when a CQI reporting mode supported by LC-MTC user equipment configures a subband for a base station, each subband includes 4 to 8 PRBs; for another example, when the CQI reporting mode currently supported by the LC-MTC user equipment selects a subband for the LC-MTC user equipment, each subband includes 2 to 4 PRBs.
Specifically, the implementation manner of determining, by the LC-MTC user equipment, a plurality of sub-bands that need to be reported to the base station and candidate sub-bands in the plurality of sub-bands based on the current CQI reporting configuration includes, but is not limited to:
1) and the current CQI reporting configuration supports the selection of the sub-band by the LC-MTC user equipment, and the LC-MTC user equipment determines the sub-band not exceeding the upper limit of the sub-band number according to the current CQI reporting configuration as a plurality of sub-bands needing to be reported to the base station and determines the candidate sub-band in the plurality of sub-bands.
It should be noted that, when the current CQI reporting configuration supports the selection of a sub-band by the LC-MTC user equipment, the number of the sub-bands that the LC-MTC user equipment needs to report to the base station does not exceed the upper limit of the number of the sub-bands of the LC-MTC user equipment.
Specifically, in this implementation, the modes for determining, by the LC-MTC ue, the sub-band that does not exceed the upper limit of the number of sub-bands supported by the LC-MTC ue as a plurality of sub-bands that need to be reported to the base station, and determining the candidate sub-band in the plurality of sub-bands include, but are not limited to:
a) and the LC-MTC user equipment determines the sub-band not exceeding the upper limit of the number of the sub-bands as a plurality of sub-bands needing to be reported to the base station, and randomly selects one or more sub-bands as candidate sub-bands.
For example, if the upper limit of the number of sub-bands supported by the LC-MTC user equipment is 3, the LC-MTC user equipment determines 3 sub-bands as a plurality of sub-bands that the LC-MTC user equipment needs to report to the base station; and, the LC-MTC user equipment may randomly select 2 subbands from the plurality of subbands as candidate subbands.
b) The method comprises the steps that LC-MTC user equipment determines sub-bands not exceeding the upper limit of the number of the sub-bands as a plurality of sub-bands needing to be reported to a base station; and, the LC-MTC user equipment calculates an actual CQI for each of the plurality of sub-bands and determines candidate sub-bands by comparing the actual CQI for each sub-band. Wherein the actual CQI of the candidate sub-band is higher than the actual CQI of other sub-bands in the plurality of sub-bands determined by the LC-MTC user equipment.
For example, if the upper limit of the number of sub-bands supported by the LC-MTC user equipment is 3, the LC-MTC user equipment determines 3 sub-bands as a plurality of sub-bands that the LC-MTC user equipment needs to report to the base station; and, the LC-MTC user equipment may determine 1 subband among the plurality of subbands having the highest actual CQI as a candidate subband.
Preferably, for a sub-band, the LC-MTC user equipment may calculate the actual CQI for the sub-band according to the total number of PDSCH symbols last received by the LC-MTC user equipment, the number of OFDM symbols last skipped during decoding of the received PDCCH symbols, and the SINR measurement value last on the sub-band or the CQI measurement value of the sub-band.
As an example, for a subband, the LC-MTC user equipment may calculate the actual CQI for the subband according to the total number of PDSCH symbols last received by the LC-MTC user equipment, the number of OFDM symbols skipped during decoding of the received PDCCH symbols last time, and the SINR measurement last time on the subband based on the following formula:
wherein,actual CQI for a subband; SINRmThe SINR value actually measured on the sub-band for the LC-MTC user equipment at the last time; n is a radical of0The total number of PDSCH symbols received last time by the LC-MTC user equipment; n is a radical ofsThe number of OFDM symbols skipped during decoding of the received PDCCH symbols for the last time of the LC-MTC user equipment; the f function is used for calculating an SINR loss value; g function for the SINRmAnd SINR loss value to calculate the actual CQI for the subband.
As another example, for a subband, the LC-MTC user equipment may calculate an actual CQI for the subband based on the following formula according to the total number of PDSCH symbols last received by the LC-MTC user equipment, the number of OFDM symbols skipped during decoding of the received PDCCH symbols last time, and the CQI measurement value for the subband:
wherein the CQImThe CQI value actually measured on the sub-band last time by the LC-MTC user equipment is obtained; d is a function used to calculate the CQI offset.
It should be noted that, the foregoing examples are only for better illustrating the technical solutions of the present invention, and are not limiting to the present invention, and it should be understood by those skilled in the art that any implementation manner that, in a case where a current CQI reporting configuration indicates that a sub-band is selected by an LC-MTC user equipment, determines, according to the current CQI reporting configuration, a sub-band that does not exceed an upper limit of the number of sub-bands, as a plurality of sub-bands that need to be reported to a base station, and determines a candidate sub-band in the plurality of sub-bands, should be included in the scope of the present invention.
In addition, by allowing the skipping of OFDM symbols in the same subframe during decoding of PDCCH and recovering the skipped OFDM symbols, cross-subframe scheduling can be avoided, greatly reducing the complexity of scheduling.
2) And if the current CQI reporting configuration indication is that the base station configures the sub-band, the LC-MTC user equipment determines a plurality of sub-bands according to the specific configuration requirement of the base station, wherein the sub-bands are used as a plurality of sub-bands needing to be reported to the base station, and determines candidate sub-bands in the plurality of sub-bands.
Specifically, in this implementation manner, the determining, by the LC-MTC ue, the multiple sub-bands according to the specific configuration requirement of the base station, where the multiple sub-bands are required to be reported to the base station, and the determining the candidate sub-bands in the multiple sub-bands includes, but is not limited to:
a) the number of sub-bands configured by the base station and required to be reported by the LC-MTC user equipment does not exceed the upper limit of the number of sub-bands supported by the LC-MTC user equipment.
In this case, the mode for determining, by the LC-MTC user equipment, the multiple subbands as the multiple subbands to be reported to the base station and determining the candidate subbands in the multiple subbands is the same as or similar to the mode for determining, by the LC-MTC user equipment in implementation 1) (when a subband is selected by the LC-MTC user equipment), the subbands that do not exceed the upper limit of the number of subbands are determined as the multiple subbands to be reported to the base station and determining the candidate subbands in the multiple subbands, and details are not repeated here.
b) The number of sub-bands configured by the base station and required to be reported by the LC-MTC user equipment exceeds the upper limit of the number of sub-bands supported by the LC-MTC user equipment.
It should be noted that, in this case, the candidate sub-band determined by the LC-MTC user equipment does not exceed the upper limit of the number of sub-bands supported by the LC-MTC user equipment, but the total number of the plurality of sub-bands determined by the LC-MTC user equipment exceeds the upper limit of the number of sub-bands supported by the LC-MTC user equipment. In a preferred scheme, the number of candidate subbands determined by the LC-MTC ue is the same as the upper limit of the number of subbands supported by the LC-MTC ue.
In this implementation manner, the manner for determining the candidate sub-band by the LC-MTC ue includes, but is not limited to:
i) and the LC-MTC user equipment randomly selects one or more sub-bands not exceeding the upper limit of the number of the sub-bands from the plurality of sub-bands as candidate sub-bands.
The manner in which the LC-MTC user equipment randomly selects one or more sub-bands not exceeding the upper limit of the number of sub-bands from the plurality of sub-bands as candidate sub-bands is the same as or similar to the manner in which the LC-MTC user equipment randomly selects one or more sub-bands from the plurality of sub-bands as candidate sub-bands in a) of implementation 1) (when the LC-MTC user equipment selects a sub-band).
For example, the upper limit of the number of sub-bands supported by the LC-MTC user equipment is 3, and the number of sub-bands configured by the base station and required to be reported by the LC-MTC user equipment is 5, the LC-MTC user equipment determines 5 sub-bands as a plurality of sub-bands required to be reported to the base station, and randomly selects 3 sub-bands from the plurality of sub-bands as candidate sub-bands.
ii) the LC-MTC user equipment calculates the actual CQI of each sub-band in the plurality of sub-bands, and determines one or more sub-bands not exceeding the upper limit of the number of sub-bands as candidate sub-bands by comparing the actual CQI of each sub-band.
Wherein the LC-MTC user equipment calculates the actual CQI of each of the plurality of sub-bands, and determines one or more sub-bands not exceeding the upper limit of the number of sub-bands as candidate sub-bands by comparing the actual CQI of each sub-band, in the same or similar manner as in b) of the foregoing implementation 1) (when a sub-band is selected by the LC-MTC user equipment), the LC-MTC user equipment calculates the actual CQI of each of the plurality of sub-bands, and determines the candidate sub-bands by comparing the actual CQI of each sub-band.
For example, the upper limit of the number of sub-bands supported by the LC-MTC user equipment is 3, and the number of sub-bands configured by the base station and required to be reported by the LC-MTC user equipment is 5, the LC-MTC user equipment determines that 5 sub-bands are multiple sub-bands required to be reported to the base station, and determines that 3 sub-bands with higher actual CQI among the multiple sub-bands are candidate sub-bands.
It should be noted that, the foregoing examples are only for better illustrating the technical solutions of the present invention, and are not limiting to the present invention, and it should be understood by those skilled in the art that any implementation manner that determines a plurality of subbands to be reported to a base station as a plurality of subbands to be reported to the base station and determines candidate subbands in the plurality of subbands in case that the current CQI reporting configuration indicates that the subbands are configured by the base station is included in the scope of the present invention.
It should be noted that, the above examples are only for better illustrating the technical solutions of the present invention, and not for limiting the present invention, and those skilled in the art should understand that any implementation manner for determining the multiple subbands to be reported to the base station and the candidate subbands in the multiple subbands based on the current CQI reporting configuration should be included in the scope of the present invention.
In step S2, the LC-MTC user equipment sets the CQI offset of the candidate sub-band to a higher CQI offset and sets the determined CQI offset of the other sub-bands of the plurality of sub-bands to a lower CQI offset.
Preferably, the higher CQI offset is a highest CQI offset and the lower CQI offset is a lowest CQI offset.
Preferably, the LC-MTC user equipment determines an optional CQI bias range according to a CQI reporting mode specified in the CQI reporting configuration, sets the CQI bias of the candidate sub-band as a higher CQI bias in the optional CQI bias range, and sets the CQI bias of other sub-bands than the candidate sub-band in the plurality of sub-bands as a lower CQI bias in the optional bias CQI range.
For example, if the LC-MTC user equipment determines that the LC-MTC user equipment supports the sub-band configured by the base station according to the CQI reporting configuration, if the optional CQI offset range is {0, 1, >2, < -1}, then in step S2, the LC-MTC user equipment sets the CQI offset of the candidate sub-band to >2, and sets the CQI offset of other sub-bands of the plurality of sub-bands that need to be reported to the base station to < -1.
For another example, if the LC-MTC user equipment determines, according to the CQI reporting configuration, that the LC-MTC user equipment supports the LC-MTC user equipment to select a subband, if the selectable offset CQI range is { <1, 2, 3, >4}, then in step S2, the LC-MTC user equipment sets the CQI offset of the candidate subband to >4, and sets the CQI offset of other subbands in the multiple subbands that need to be reported to the base station to < 1.
It should be noted that the above examples are only for better illustrating the technical solutions of the present invention, and not for limiting the present invention, and those skilled in the art should understand that any implementation manner of setting the CQI offset of the candidate subband as a higher CQI offset and setting the CQI offset of other subbands in the plurality of subbands as a lower CQI offset should be included in the scope of the present invention.
In step S3, the LC-MTC user equipment reports the set CQI offset of the multiple subbands to the base station to which the user equipment belongs.
According to the scheme of the embodiment, the LC-MTC user equipment can enable the base station to tend to select the candidate sub-band with higher CQI by setting the CQI deviation of the reported sub-bands, so that the sub-bands scheduled by the base station when the base station transmits data to the LC-MTC user equipment are reduced in the existing traditional network, and the possibility that the LC-MTC user equipment loses data or cannot normally transmit the data due to the limited bandwidth in the existing traditional network is reduced. Preferably, when the CQI offset of the candidate sub-band is set to be the highest and the CQI offset of the other sub-bands is set to be the lowest, the probability that the base station selects the candidate sub-band can be further increased, so that the probability that the LC-MTC user equipment loses data or cannot normally transmit data due to the limited bandwidth in the existing conventional network is further reduced.
Preferably, when the CQI reporting mode selects a sub-band for the LC-MTC user equipment, the base station can better avoid the situation that the base station schedules too many sub-bands (i.e., sub-bands exceeding the upper limit of the number of sub-bands supported by the LC-MTC user equipment) by limiting the number of sub-bands reported by the LC-MTC user equipment; and when the CQI reporting mode is that the base station configures sub-bands and the number of the sub-bands specified to be reported by the base station exceeds the upper limit of the number of the sub-bands supported by the LC-MTC user equipment, the advantage of reducing the sub-bands scheduled when the base station transmits data to the LC-MTC user equipment by setting the CQI deviation of the sub-bands is more obvious.
Preferably, by selecting a subband having a high actual CQI as a candidate subband, communication quality can be improved.
As a preferable solution, the method of the present embodiment further includes executing step S5 before step S3, and step S3 further includes step S3'.
In step S5, the LC-MTC user equipment calculates an average CQI for all sub-bands. Wherein, the all sub-bands refer to all sub-bands included in the whole bandwidth range supported by the base station. If the base station bandwidth is 20MHz, all the sub-bands refer to all the sub-bands included in the 20MHz bandwidth range.
Wherein the LC-MTC user equipment may calculate the average CQI according to the total number of PDSCH symbols received by the LC-MTC user equipment, the number of skipped OFDM symbols during decoding of the received PDCCH symbols, and the SINR average of all subbands or the CQI average of all subbands.
As an example, the LC-MTC user equipment may calculate the average CQI for all subbands based on the total number of PDSCH symbols last received by the LC-MTC user equipment, the number of OFDM symbols skipped during the last decoding of the received PDCCH symbols, and the SINR average over all subbands last time, and based on the following formula:
wherein,average CQI for all sub-bands; SINRnAnd averaging the SINR measured on all sub-bands by the LC-MTC user equipment.
As another example, the LC-MTC user equipment may calculate the average CQI for all subbands based on the total number of PDSCH symbols last received by the LC-MTC user equipment, the number of OFDM symbols last skipped during decoding of the received PDCCH symbols, and the measured CQI average over all subbands, and based on the following formula:
wherein the CQInAnd averaging CQI of all sub-bands for the LC-MTC user equipment.
It should be noted that the above examples are only for better illustrating the technical solutions of the present invention, and not for limiting the present invention, and those skilled in the art should understand that any implementation manner for calculating the average CQI of the multiple sub-bands according to the actual CQI of the multiple sub-bands should be included in the scope of the present invention.
In step S3', the LC-MTC ue reports the set CQI offset of the multiple sub-bands and the average CQI to a base station to which the ue belongs.
It should be noted that, when the network where the LC-MTC ue is currently located supports LC-MTC, the LC-MTC ue may perform a standard LC-MTC access procedure and a transmission/reception procedure according to the specification in release 12.
The scheme also allows the OFDM symbols in the same subframe to be skipped during the decoding of the PDCCH, and the skipped OFDM symbols can be recovered, thereby avoiding the cross-subframe scheduling and greatly reducing the scheduling complexity.
Fig. 2 is a flowchart illustrating a method for sub-band CQI reporting in an LC-MTC user equipment according to another embodiment of the present invention. The method of the embodiment is mainly realized by LC-MTC user equipment; any description of the LC-MTC ue described with reference to the embodiment shown in fig. 1 is included in this embodiment by way of reference. The method according to the present embodiment includes step S1, step S2, step S3, and step S4. Step S1, step S2, and step S3 are already described in detail with reference to the embodiment shown in fig. 1, and are included herein by way of reference, and are not described again.
In step S4, when it is not scheduled by the base station within a predetermined time or when there are PRBs used by the base station when scheduling the LC-MTC device that do not belong to the PRBs corresponding to the candidate subband, the LC-MTC user equipment uses all or part of the other subbands as candidate subbands, and repeats steps S2 and S3.
Specifically, when the PRBs cannot be scheduled by the base station within the predetermined time or the PRBs used by the base station when scheduling the LC-MTC device do not belong to the PRBs corresponding to the candidate subband, the LC-MTC user device uses all or part of the other subbands as the candidate subbands, and the implementation manner of repeating the steps S2 and S3 includes but is not limited to:
1) the LC-MTC user equipment is not scheduled by the base station for a predetermined time, the LC-MTC user equipment takes all or part of the other sub-bands as candidate sub-bands, and repeats the steps S2 and S3.
For example, the predetermined time is 5 CQI reporting periods, and if the LC-MTC user equipment is not scheduled by the base station for more than 5 CQI reporting periods, the LC-MTC user equipment uses one other sub-band as a candidate sub-band, and repeats the steps S2 and S3.
2) And the PRBs used by the base station when the LC-MTC equipment is scheduled do not belong to the PRBs corresponding to the candidate sub-bands, the LC-MTC user equipment takes all or part of the other sub-bands as the candidate sub-bands, and the steps S2 and S3 are repeated.
Preferably, the LC-MTC user equipment takes the sub-band to which the PRB used by the base station when the base station schedules the LC-MTC user equipment belongs as a candidate sub-band.
For example, the LC-MTC user equipment reports two sub-bands to the base station: subband 1 and subband 2. Wherein, the sub-band 1 is a candidate sub-band; wherein subband 1 comprises PRB1, PRB2, PRB3 and PRB4, and subband 2 comprises PRB5, PRB6, PRB7 and PRB 8; the PRBs used by the base station to schedule the LC-MTC device are PRB5, PRB6, PRB7 and PRB8, and then the LC-MTC user equipment takes subband 2 as a candidate subband, and repeats the steps S2 and S3.
3) If the PRB existing part used when the base station schedules the LC-MTC device does not belong to the PRB corresponding to the candidate subband, the LC-MTC user equipment still retains the PRB as the candidate subband for which the corresponding PRB is scheduled, and the LC-MTC user equipment further uses all or part of the other subbands as new candidate subbands, and repeats steps S2 and S3.
For example, the LC-MTC user equipment reports two sub-bands to the base station: subband 1 and subband 2. Wherein, the sub-band 1 is a candidate sub-band; wherein subband 1 comprises PRB1, PRB2, PRB3 and PRB4, and subband 2 comprises PRB5, PRB6, PRB7 and PRB 8; the PRBs used by the base station when scheduling the LC-MTC device are PRB1, PRB2, PRB7 and PRB8, then the LC-MTC user equipment uses reserved subband 1 as a candidate subband, determines subband 2 as a new candidate subband, and repeats the steps S2 and S3.
It should be noted that, the foregoing examples are only for better illustrating the technical solutions of the present invention, and not for limiting the present invention, and those skilled in the art should understand that any implementation manner that, when PRBs used when the PRBs are not scheduled by the base station within the predetermined time or when the base station schedules the LC-MTC device do not all belong to the candidate sub-band, all or part of the other sub-bands are taken as candidate sub-bands, and the steps S2 and S3 are repeated should be included in the scope of the present invention.
According to the scheme of the embodiment, the LC-MTC user equipment can update the candidate sub-band in the sub-bands reported to the base station according to the actual scheduling condition of the LC-MTC user equipment by the base station, so that the scheduling possibility and effectiveness of the LC-MTC user equipment can be increased. For example, when the candidate sub-band determined by the LC-MTC user equipment is a sub-band reserved by the base station for other purposes, the base station will not schedule the LC-MTC user equipment on the candidate sub-band, and the scheme of this embodiment may avoid the LC-MTC user equipment from being scheduled by updating the candidate sub-band.
Fig. 3 is a schematic structural diagram of a reporting apparatus for reporting sub-band CQI in an LC-MTC user equipment according to an embodiment of the present invention.
The reporting device according to the present embodiment includes a determining device 1, a setting device 2, and a transmitting device 3.
The determining device 1 determines a plurality of sub-bands which need to be reported to a base station and candidate sub-bands in the plurality of sub-bands based on the current CQI reporting configuration, wherein the number of the candidate sub-bands does not exceed the upper limit of the number of sub-bands supported by the LC-MTC user equipment.
And the base station can realize the CQI reporting configuration by sending a message to LC-MTC user equipment. The message sent by the base station for performing CQI reporting configuration for the LC-MTC user equipment may include multiple types. For example, the message sent by the base station to the LC-MTC user equipment includes but is not limited to:
RRCConnectionSetup (RRC connection establishment);
RRCConnectionReestablishment (RRC connection reestablishment);
RRCConnectionReconfiguration (RRC connection reconfiguration), and the like.
The CQI reporting configuration can be used for indicating a CQI reporting mode of LC-MTC user equipment; the CQI reporting method mainly includes: 1) the base station configures sub-bands, namely the base station specifies the number of the sub-bands needing to be reported by the LC-MTC user equipment, for example, the CQI reporting configuration indicates that the base station specifies that the LC-MTC user equipment reports the CQI of 5 sub-bands to the base station; 2) the LC-MTC user equipment selects the sub-band, namely the user equipment selects the quantity of the sub-band which needs to be reported by the user equipment.
Wherein each subband comprises a plurality of PRBs. For example, when a CQI reporting mode supported by LC-MTC user equipment configures a subband for a base station, each subband includes 4 to 8 PRBs; for another example, when the CQI reporting mode currently supported by the LC-MTC user equipment selects a subband for the LC-MTC user equipment, each subband includes 2 to 4 PRBs.
Specifically, the implementation manner of determining, by the determining device 1, a plurality of sub-bands that need to be reported to the base station and candidate sub-bands in the plurality of sub-bands based on the current CQI reporting configuration includes, but is not limited to:
1) if the current CQI reporting configuration supports the selection of a sub-band by the LC-MTC user equipment, the determining device 1 determines, according to the current CQI reporting configuration, a sub-band that does not exceed the upper limit of the number of sub-bands, as a plurality of sub-bands that need to be reported to the base station, and determines a candidate sub-band among the plurality of sub-bands.
It should be noted that, when the current CQI reporting configuration supports the selection of a sub-band by the LC-MTC user equipment, the number of the sub-bands that the LC-MTC user equipment needs to report to the base station does not exceed the upper limit of the number of the sub-bands of the LC-MTC user equipment.
Specifically, the ways for determining the sub-band not exceeding the upper limit of the number of sub-bands supported by the determining device 1 in this implementation manner to serve as a plurality of sub-bands that need to be reported to the base station, and determining the candidate sub-band in the plurality of sub-bands include, but are not limited to:
a) the determining device 1 determines the sub-band not exceeding the upper limit of the number of the sub-bands as a plurality of sub-bands to be reported to the base station, and randomly selects one or more sub-bands from the plurality of sub-bands as candidate sub-bands.
For example, if the upper limit of the number of sub-bands supported by the LC-MTC user equipment is 3, the determining device 1 determines 3 sub-bands as a plurality of sub-bands that need to be reported to the base station; also, the determination device 1 may randomly select 2 subbands from the plurality of subbands as candidate subbands.
b) The determining device 1 determines the sub-band not exceeding the upper limit of the sub-band number as a plurality of sub-bands needing to be reported to the base station; and, the determination device 1 calculates an actual CQI for each of the plurality of subbands and determines candidate subbands by comparing the actual CQI for each of the subbands. Wherein the actual CQI of the candidate sub-band is higher than the actual CQI of other sub-bands in the plurality of sub-bands determined by the LC-MTC user equipment.
For example, if the upper limit of the number of sub-bands supported by the LC-MTC user equipment is 3, the determining device 1 determines 3 sub-bands as a plurality of sub-bands that need to be reported to the base station; and, the determination device 1 may determine 1 subband having the highest actual CQI among the plurality of subbands as a candidate subband.
Preferably, for a sub-band, the reporting device may calculate the actual CQI of the sub-band according to the total number of PDSCH symbols received last by the LC-MTC ue, the number of OFDM symbols skipped during decoding of the received PDCCH symbols last time, and the SINR measurement value or the CQI measurement value of the sub-band last time on the sub-band.
As an example, for a sub-band, the reporting device may calculate the actual CQI for the sub-band according to the total number of PDSCH symbols received last by the LC-MTC user equipment, the number of OFDM symbols skipped during decoding of the received PDCCH symbols last time, and the SINR measurement value last time on the sub-band, based on the following formula:
wherein,actual CQI for a subband; SINRm is an SINR value actually measured on the sub-band by the LC-MTC user equipment last time; n0 is the total number of PDSCH symbols last received by the LC-MTC user equipment; ns is the number of OFDM symbols last skipped by the LC-MTC user equipment during decoding of the received PDCCH symbol; the f function is used for calculating an SINR loss value; the g function is used to calculate the actual CQI for the subband from the SINRm and SINR loss values.
As another example, for a sub-band, the reporting device may calculate the actual CQI for the sub-band according to the total number of PDSCH symbols received last by the LC-MTC user equipment, the number of OFDM symbols skipped during decoding of the received PDCCH symbols last, and the CQI measurement value for the sub-band, based on the following formula:
the CQIm is a CQI value actually measured by the LC-MTC user equipment on the sub-band last time; d is a function used to calculate the CQI offset.
Preferably, when the reporting device determines the candidate subbands of the plurality of base stations that need to be reported to the base station by calculating the actual CQI of each subband, the operation of calculating the CQI value of each subband may be performed by the determining device 1 in the reporting device.
It should be noted that, the foregoing examples are only for better illustrating the technical solutions of the present invention, and are not limiting to the present invention, and it should be understood by those skilled in the art that any implementation manner that, in a case where a current CQI reporting configuration indicates that a sub-band is selected by an LC-MTC user equipment, determines, according to the current CQI reporting configuration, a sub-band that does not exceed an upper limit of the number of sub-bands, as a plurality of sub-bands that need to be reported to a base station, and determines a candidate sub-band in the plurality of sub-bands, should be included in the scope of the present invention.
In addition, by allowing the skipping of OFDM symbols in the same subframe during decoding of PDCCH and recovering the skipped OFDM symbols, cross-subframe scheduling can be avoided, greatly reducing the complexity of scheduling.
2) If the current CQI report configuration indicates that the base station configures a sub-band, the determining apparatus 1 determines a plurality of sub-bands according to the specific configuration requirement of the base station, and determines candidate sub-bands among the plurality of sub-bands, where the plurality of sub-bands are required to be reported to the base station.
Specifically, in this implementation, the determining apparatus 1 determines, according to the specific configuration requirement of the base station, a plurality of sub-bands, as the plurality of sub-bands that need to be reported to the base station, and the manner of determining the candidate sub-band in the plurality of sub-bands includes, but is not limited to:
a) the number of sub-bands configured by the base station and required to be reported by the LC-MTC user equipment does not exceed the upper limit of the number of sub-bands supported by the LC-MTC user equipment.
In this case, the manner in which the determining device 1 determines the multiple subbands as multiple subbands to be reported to the base station and determines the candidate subbands in the multiple subbands is the same as or similar to the manner in which the determining device 1 determines the subbands not exceeding the upper limit of the number of subbands as the multiple subbands to be reported to the base station and determines the candidate subbands in the multiple subbands (when the subbands are selected by the LC-MTC user equipment) in implementation 1), and thus, details are not repeated here.
b) The number of sub-bands configured by the base station and required to be reported by the LC-MTC user equipment exceeds the upper limit of the number of sub-bands supported by the LC-MTC user equipment.
It should be noted that, in this case, the candidate sub-band determined by the determining device 1 does not exceed the upper limit of the number of sub-bands supported by the LC-MTC user equipment, but the total number of the plurality of sub-bands determined by the determining device 1 exceeds the upper limit of the number of sub-bands supported by the LC-MTC user equipment. As a preferable mode, the number of candidate subbands determined by the determining means 1 is equal to the upper limit of the number of subbands supported by the determining means.
In this implementation, the determining apparatus 1 determines the candidate subbands by the following methods, but not limited to:
i) the determination device 1 randomly selects one or more subbands not exceeding the upper limit of the number of subbands from among the plurality of subbands as candidate subbands.
The manner in which the determining apparatus 1 randomly selects one or more sub-bands not exceeding the upper limit of the number of sub-bands from the plurality of sub-bands as candidate sub-bands is the same as or similar to the manner in which the determining apparatus 1 randomly selects one or more sub-bands from the plurality of sub-bands as candidate sub-bands in a) of the foregoing implementation 1) (when the sub-bands are selected by the LC-MTC user equipment).
For example, if the upper limit of the number of sub-bands supported by the LC-MTC user equipment is 3, and the number of sub-bands configured by the base station and required to be reported by the LC-MTC user equipment is 5, the determining device 1 determines that the 5 sub-bands are multiple sub-bands required to be reported to the base station, and randomly selects 3 sub-bands from the multiple sub-bands as candidate sub-bands.
ii) the determination apparatus 1 calculates an actual CQI for each of the plurality of subbands, and determines one or more subbands not exceeding an upper limit of the number of subbands as candidate subbands by comparing the actual CQI for each subband.
Wherein the determining apparatus 1 calculates the actual CQI of each of the plurality of sub-bands, and determines one or more sub-bands not exceeding the upper limit of the number of sub-bands by comparing the actual CQI of each of the plurality of sub-bands as candidate sub-bands, in the same or similar manner as in b) of the foregoing implementation 1) (when a sub-band is selected by the LC-MTC user equipment), the determining apparatus 1 calculates the actual CQI of each of the plurality of sub-bands, and determines the candidate sub-bands by comparing the actual CQI of each of the plurality of sub-bands.
For example, if the upper limit of the number of sub-bands supported by the LC-MTC user equipment is 3, and the number of sub-bands configured by the base station and required to be reported by the LC-MTC user equipment is 5, the determining device 1 determines that the 5 sub-bands are multiple sub-bands that need to be reported to the base station, and determines that 3 sub-bands with higher actual CQI among the multiple sub-bands are candidate sub-bands.
It should be noted that, the foregoing examples are only for better illustrating the technical solutions of the present invention, and are not limiting to the present invention, and it should be understood by those skilled in the art that any implementation manner that determines a plurality of subbands to be reported to a base station as a plurality of subbands to be reported to the base station and determines candidate subbands in the plurality of subbands in case that the current CQI reporting configuration indicates that the subbands are configured by the base station is included in the scope of the present invention.
It should be noted that, the above examples are only for better illustrating the technical solutions of the present invention, and not for limiting the present invention, and those skilled in the art should understand that any implementation manner for determining the multiple subbands to be reported to the base station and the candidate subbands in the multiple subbands based on the current CQI reporting configuration should be included in the scope of the present invention.
The setting means 2 sets the CQI offset of the candidate subband to a higher CQI offset and sets the determined CQI offset of the other subbands of the plurality of subbands to a lower CQI offset.
Preferably, the higher CQI offset is a highest CQI offset and the lower CQI offset is a lowest CQI offset.
Preferably, the setting device 2 determines the optional CQI bias range according to a CQI reporting mode specified in the CQI reporting configuration, sets the CQI bias of the candidate subband to a higher CQI bias in the optional CQI bias range, and sets the CQI bias of the other subbands than the candidate subband in the plurality of subbands to a lower CQI bias in the optional bias CQI range.
For example, if the LC-MTC user equipment determines that the LC-MTC user equipment supports the sub-band configured by the base station according to the CQI reporting configuration, if the optional CQI offset range is {0, 1, >2, < -1}, the setting device 2 sets the CQI offset of the candidate sub-band to >2, and sets the CQI offset of other sub-bands of the plurality of sub-bands to be reported to the base station to < -1.
For another example, if the LC-MTC user equipment determines, according to the CQI reporting configuration, that the LC-MTC user equipment supports the LC-MTC user equipment to select a subband, if the selectable offset CQI range is { <1, 2, 3, >4}, the setting device 2 sets the CQI offset of the candidate subband to >4, and sets the CQI offset of other subbands in the plurality of subbands to be reported to the base station to < 1.
It should be noted that the above examples are only for better illustrating the technical solutions of the present invention, and not for limiting the present invention, and those skilled in the art should understand that any implementation manner of setting the CQI offset of the candidate subband as a higher CQI offset and setting the CQI offset of other subbands in the plurality of subbands as a lower CQI offset should be included in the scope of the present invention.
The transmitter 3 reports the set CQI offset for the plurality of subbands to the base station to which the user equipment belongs.
According to the scheme of the embodiment, the LC-MTC user equipment can enable the base station to tend to select the candidate sub-band with higher CQI by setting the CQI deviation of the reported sub-bands, so that the sub-bands scheduled by the base station when the base station transmits data to the LC-MTC user equipment are reduced in the existing traditional network, and the possibility that the LC-MTC user equipment loses data or cannot normally transmit the data due to the limited bandwidth in the existing traditional network is reduced. Preferably, when the CQI offset of the candidate sub-band is set to be the highest and the CQI offset of the other sub-bands is set to be the lowest, the probability that the base station selects the candidate sub-band can be further increased, so that the probability that the LC-MTC user equipment loses data or cannot normally transmit data due to the limited bandwidth in the existing conventional network is further reduced.
Preferably, when the CQI reporting mode selects a sub-band for the LC-MTC user equipment, the base station can better avoid the situation that the base station schedules too many sub-bands (i.e., sub-bands exceeding the upper limit of the number of sub-bands supported by the LC-MTC user equipment) by limiting the number of sub-bands reported by the LC-MTC user equipment; and when the CQI reporting mode is that the base station configures sub-bands and the number of the sub-bands specified to be reported by the base station exceeds the upper limit of the number of the sub-bands supported by the LC-MTC user equipment, the advantage of reducing the sub-bands scheduled when the base station transmits data to the LC-MTC user equipment by setting the CQI deviation of the sub-bands is more obvious.
Preferably, by selecting a subband having a high actual CQI as a candidate subband, communication quality can be improved.
As a preferable scheme, the reporting apparatus of this embodiment further includes a computing apparatus (not shown) that performs operations before the sending apparatus 3, and the sending apparatus 3 further includes a sub-sending apparatus (not shown).
The computing means computes the average CQI for all sub-bands. Wherein, the all sub-bands refer to all sub-bands included in the whole bandwidth range supported by the base station. If the base station bandwidth is 20MHz, all the sub-bands refer to all the sub-bands included in the 20MHz bandwidth range.
Wherein the calculating means may calculate the average CQI from the total number of PDSCH symbols received by the LC-MTC user equipment, the number of OFDM symbols skipped during decoding of the received PDCCH symbols, and the SINR average of all subbands or the CQI average of all subbands.
As one example, the computing means may compute the average CQI for all subbands according to the total number of PDSCH symbols last received by the LC-MTC user equipment, the number of OFDM symbols skipped during the last decoding of the received PDCCH symbols, and the SINR average over all subbands last time, and based on the following formula:
wherein,average CQI for all sub-bands; SINRn is the average value of SINRs measured by the LC-MTC user equipment on all sub-bands.
As another example, the calculating means may calculate the average CQI for all subbands according to the total number of PDSCH symbols last received by the LC-MTC user equipment, the number of OFDM symbols skipped during decoding of the received PDCCH symbols last time, and the measured CQI average over all subbands, and based on the following formula:
the CQin is the average CQI of the LC-MTC user equipment in all sub-bands.
It should be noted that the above examples are only for better illustrating the technical solutions of the present invention, and not for limiting the present invention, and those skilled in the art should understand that any implementation manner for calculating the average CQI of the multiple sub-bands according to the actual CQI of the multiple sub-bands should be included in the scope of the present invention.
And the sub-sending device reports the set CQI deviations of the sub-bands and the average CQI to a base station to which the user equipment belongs.
It should be noted that, when the network where the LC-MTC ue is currently located supports LC-MTC, the LC-MTC ue may perform a standard LC-MTC access procedure and a transmission/reception procedure according to the specification in release 12.
The scheme also allows the OFDM symbols in the same subframe to be skipped during the decoding of the PDCCH, and the skipped OFDM symbols can be recovered, thereby avoiding the cross-subframe scheduling and greatly reducing the scheduling complexity.
Fig. 4 is a schematic structural diagram of a reporting apparatus for reporting sub-band CQI in an LC-MTC user equipment according to another embodiment of the present invention. The reporting device according to the present embodiment includes a determining device 1, a setting device 2, a transmitting device 3, and a reselecting device 4. The determining device 1, the setting device 2 and the sending device 3 have been described in detail in the embodiment shown in fig. 3, and are included herein by way of reference, which is not described again.
When the scheduling by the base station fails to be performed within the predetermined time or when the PRB used by the base station for scheduling the LC-MTC device does not belong to the PRB corresponding to the candidate subband, the reselection device 4 takes all or part of the other subbands as the candidate subbands and triggers the setting device 2 and the transmission device 3 to perform the operation repeatedly.
Specifically, when the base station fails to schedule the data in the predetermined time or when the base station schedules the LC-MTC device, the PRB used by the base station does not belong to the PRB corresponding to the candidate subband, the reselection device 4 takes all or part of the other subbands as the candidate subbands and triggers the setting device 2 and the transmission device 3 to repeatedly perform operations in an implementation manner, including but not limited to:
1) the LC-MTC user equipment is not scheduled by the base station within the predetermined time, the reselection device 4 takes all or part of the other sub-bands as candidate sub-bands, and triggers the setting device 2 and the transmission device 3 to repeatedly perform operations.
For example, the predetermined time is 5 CQI reporting periods, and if the LC-MTC user equipment is not scheduled by the base station for more than 5 CQI reporting periods, the reselection device 4 takes one other sub-band as a candidate sub-band, and triggers the setting device 2 and the sending device 3 to repeatedly execute operations.
2) All the PRBs used by the base station when the LC-MTC equipment is scheduled do not belong to the PRBs corresponding to the candidate sub-bands, the reselection device 4 takes all or part of the other sub-bands as the candidate sub-bands, and triggers the setting device 2 and the sending device 3 to repeatedly execute the operation.
Preferably, the reselection device 4 takes the sub-band to which the PRB used by the base station for scheduling the LC-MTC user equipment belongs as a candidate sub-band.
For example, the LC-MTC user equipment reports two sub-bands to the base station: subband 1 and subband 2. Wherein, the sub-band 1 is a candidate sub-band; wherein subband 1 comprises PRB1, PRB2, PRB3 and PRB4, and subband 2 comprises PRB5, PRB6, PRB7 and PRB 8; the PRBs used when the base station schedules the LC-MTC device are PRB5, PRB6, PRB7 and PRB8, the reselection device 4 takes subband 2 as a candidate subband, and triggers the setting device 2 and the transmission device 3 to repeatedly perform operations.
3) If the existing part of the PRBs used when the base station schedules the LC-MTC device does not belong to the PRBs corresponding to the candidate subband, the reselection device 4 still retains the corresponding PRBs as the candidate subband for which the corresponding PRB is scheduled, and the reselection device 4 further uses all or part of the other subbands as new candidate subbands and triggers the setting device 2 and the transmitting device 3 to repeatedly perform operations.
For example, the LC-MTC user equipment reports two sub-bands to the base station: subband 1 and subband 2. Wherein, the sub-band 1 is a candidate sub-band; wherein subband 1 comprises PRB1, PRB2, PRB3 and PRB4, and subband 2 comprises PRB5, PRB6, PRB7 and PRB 8; the PRBs used when the base station schedules the LC-MTC device are PRB1, PRB2, PRB7 and PRB8, the reselection device 4 uses reserved subband 1 as a candidate subband, determines subband 2 as a new candidate subband, and triggers the setting device 2 and the transmitting device 3 to repeatedly perform operations.
It should be noted that, the foregoing examples are only for better illustrating the technical solutions of the present invention, and not for limiting the present invention, and those skilled in the art should understand that any PRB that is not scheduled by the base station within the predetermined time or used when the base station schedules the LC-MTC device does not all belong to the candidate subbands, all or part of the other subbands are taken as candidate subbands, and the setting device 2 and the transmitting device 3 are triggered to repeatedly perform operations, and all the subbands or part of the other subbands are included in the scope of the present invention.
According to the scheme of the embodiment, the LC-MTC user equipment can update the candidate sub-band in the sub-bands reported to the base station according to the actual scheduling condition of the LC-MTC user equipment by the base station, so that the scheduling possibility and effectiveness of the LC-MTC user equipment can be increased. For example, when the candidate sub-band determined by the LC-MTC user equipment is a sub-band reserved by the base station for other purposes, the base station will not schedule the LC-MTC user equipment on the candidate sub-band, and the scheme of this embodiment may avoid the LC-MTC user equipment from being scheduled by updating the candidate sub-band.
It is noted that the present invention may be implemented in software and/or in a combination of software and hardware, for example, the various means of the invention may be implemented using Application Specific Integrated Circuits (ASICs) or any other similar hardware devices. In one embodiment, the software program of the present invention may be executed by a processor to implement the steps or functions described above. Also, the software programs (including associated data structures) of the present invention can be stored in a computer readable recording medium, such as RAM memory, magnetic or optical drive or diskette and the like. Further, some of the steps or functions of the present invention may be implemented in hardware, for example, as circuitry that cooperates with the processor to perform various steps or functions.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the system claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.

Claims (15)

1. A method for sub-band CQI reporting in LC-MTC user equipment, wherein the current network of the LC-MTC user equipment does not support LC-MTC configuration, comprises the following steps:
a. determining a plurality of sub-bands needing to be reported to a base station and candidate sub-bands in the sub-bands based on the current CQI reporting configuration, wherein the number of the candidate sub-bands does not exceed the upper limit of the number of the sub-bands supported by the LC-MTC user equipment;
b. setting the CQI bias of the candidate sub-band to a higher CQI bias, and setting the CQI bias of the other sub-bands in the plurality of sub-bands to a lower CQI bias;
c. reporting the set CQI deviations of the plurality of sub-bands to a base station to which the user equipment belongs;
wherein the step b comprises:
and determining an optional CQI deviation range according to a CQI reporting mode appointed in the CQI reporting configuration, setting the CQI deviation of the candidate sub-band as a higher CQI deviation in the optional CQI deviation range, and setting the CQI deviation of other sub-bands except the candidate sub-band in the plurality of sub-bands as a lower CQI deviation in the optional deviation CQI range.
2. The method of claim 1, wherein an actual CQI for the candidate subband is higher than an actual CQI for other subbands in the plurality of subbands.
3. The method of claim 2, wherein the step of calculating the actual CQI for one subband comprises:
-calculating an actual CQI for the sub-band based on the total number of PDSCH symbols last received by the LC-MTC user equipment, the number of OFDM symbols last skipped during decoding of the received PDCCH symbols, and the SINR measurement last on the sub-band or the CQI measurement on the sub-band.
4. The method according to any one of claims 1 to 3, wherein the current CQI reporting configuration supports selection of a sub-band by an LC-MTC user equipment, and the number of the plurality of sub-bands does not exceed an upper limit of the number of sub-bands supported by the LC-MTC user equipment.
5. The method according to any one of claims 1 to 3, wherein the current CQI reporting configuration supports sub-band configuration by the base station, and the number of the plurality of sub-bands exceeds an upper limit of the number of sub-bands supported by the LC-MTC user equipment.
6. The method according to any one of claims 1 to 3, wherein the method further comprises the steps of:
-when not scheduled by the base station within a predetermined time or when the base station schedules the LC-MTC device using PRBs existing without PRBs corresponding to the candidate subband, taking all or part of the other subbands as candidate subbands and repeating the steps b and c.
7. The method according to any one of claims 1 to 3, wherein the method further comprises, before step c, the steps of:
-calculating an average CQI for all sub-bands;
wherein the step c comprises the steps of:
reporting the set CQI deviation of the plurality of sub-bands and the average CQI to a base station to which the user equipment belongs.
8. A reporting device for sub-band CQI reporting in LC-MTC user equipment, wherein the current network of the LC-MTC user equipment does not support LC-MTC configuration, the reporting device comprises the following devices:
a determining device, configured to determine, based on a current CQI reporting configuration, a plurality of sub-bands that need to be reported to a base station and candidate sub-bands in the plurality of sub-bands, where the number of the candidate sub-bands does not exceed an upper limit of a number of sub-bands supported by the LC-MTC user equipment;
setting means for setting the CQI bias for the candidate subband to a higher CQI bias and the CQI bias for the other subbands in the plurality of subbands to a lower CQI bias;
a sending device, configured to report the set CQI offset of the multiple subbands to a base station to which the ue belongs;
wherein the setting means is for:
and determining an optional CQI deviation range according to a CQI reporting mode appointed in the CQI reporting configuration, setting the CQI deviation of the candidate sub-band as a higher CQI deviation in the optional CQI deviation range, and setting the CQI deviation of other sub-bands except the candidate sub-band in the plurality of sub-bands as a lower CQI deviation in the optional deviation CQI range.
9. The reporting apparatus of claim 8, wherein the actual CQI for the candidate subband is higher than the actual CQI for other subbands in the plurality of subbands.
10. The reporting apparatus of claim 9, wherein the operation of calculating the actual CQI for a subband comprises:
and calculating the actual CQI of the sub-band according to the total number of the PDSCH symbols received last time by the LC-MTC user equipment, the number of OFDM symbols skipped during the decoding of the received PDCCH symbols last time, and the SINR measurement value on the sub-band last time or the CQI measurement value on the sub-band.
11. The reporting apparatus according to any one of claims 8 to 10, wherein the current CQI reporting configuration supports selection of a sub-band by an LC-MTC user equipment, and a number of the plurality of sub-bands does not exceed an upper limit of a number of sub-bands supported by the LC-MTC user equipment.
12. The reporting apparatus according to any one of claims 8 to 10, wherein the current CQI reporting configuration supports sub-band configuration by the base station, and the number of the plurality of sub-bands exceeds an upper limit of the number of sub-bands supported by the LC-MTC user equipment.
13. The reporting apparatus according to any one of claims 8 to 10, wherein the reporting apparatus further comprises:
and the reselection device is used for taking all or part of the other sub-bands as the candidate sub-bands and triggering the setting device and the sending device to repeatedly execute the operation when the PRBs which are not scheduled by the base station within the preset time or used when the base station schedules the LC-MTC equipment do not belong to the PRBs corresponding to the candidate sub-bands.
14. The reporting apparatus according to any one of claims 8 to 10, wherein the reporting apparatus further comprises the following apparatus, which performs operations before the transmitting apparatus:
calculating means for calculating an average CQI for all sub-bands;
wherein the transmitting device comprises the following devices:
and the sub-sending device is used for reporting the set CQI deviations of the plurality of sub-bands and the average CQI to a base station to which the user equipment belongs.
15. An LC-MTC user equipment comprising the reporting apparatus according to any one of claims 8 to 14.
CN201410109877.4A 2014-03-21 2014-03-21 The method, apparatus and equipment that subband CQI is reported are carried out in LC-MTC user equipmenies Active CN104935402B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410109877.4A CN104935402B (en) 2014-03-21 2014-03-21 The method, apparatus and equipment that subband CQI is reported are carried out in LC-MTC user equipmenies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410109877.4A CN104935402B (en) 2014-03-21 2014-03-21 The method, apparatus and equipment that subband CQI is reported are carried out in LC-MTC user equipmenies

Publications (2)

Publication Number Publication Date
CN104935402A CN104935402A (en) 2015-09-23
CN104935402B true CN104935402B (en) 2018-07-10

Family

ID=54122388

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410109877.4A Active CN104935402B (en) 2014-03-21 2014-03-21 The method, apparatus and equipment that subband CQI is reported are carried out in LC-MTC user equipmenies

Country Status (1)

Country Link
CN (1) CN104935402B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114765483B (en) * 2021-01-15 2025-04-08 维沃移动通信有限公司 Method, device and terminal for reporting channel state information

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101426225B (en) * 2008-12-09 2010-09-29 中兴通讯股份有限公司 Method for uploading channel quality indication report by terminal
CN101789841B (en) * 2009-01-24 2014-04-09 中兴通讯股份有限公司 Channel quality information feedback method and terminal
CN101808370B (en) * 2009-02-18 2012-07-25 华为技术有限公司 Method and device for reporting status information of channel

Also Published As

Publication number Publication date
CN104935402A (en) 2015-09-23

Similar Documents

Publication Publication Date Title
US9681427B2 (en) Method for transmitting feedback information for downlink data, terminal, and base station
US9345044B2 (en) Method and apparatus for processing information
CN107615854B (en) Terminal device, base station device, and communication method
CN106455091B (en) A method and device for reporting channel state information CSI
EP3257313B1 (en) Selective distribution of system information for mtc
EP2528400B1 (en) Method, terminal and base station for triggering terminal to transmit sounding reference signal
US10912076B2 (en) Physical downlink control channel transmission method and apparatus
CN108738149B (en) Apparatus and method for processing common search space
EP3013092B1 (en) Terminal apparatus, base station apparatus, integrated circuit, and radio communication method
US20180084548A1 (en) Access point (ap), station (sta) and method for full-duplex (fd) communication in high-efficiency (he) arrangements
EP3703295B1 (en) Monitoring method and relevant apparatus for downlink control channel
US12010199B2 (en) Information transmission method, apparatus, and system
CN107896140A (en) Data method of sending and receiving, base station and user equipment
WO2016161871A1 (en) Method, user terminal, base station, and system for reporting channel state information
WO2018210493A1 (en) Techniques for handling semi-persistent scheduling collisions for wireless networks
WO2017081490A1 (en) Method of initialising physical downlink control channel (pdcch) for emtc and iot devices
EP3565166A1 (en) Method for sending and receiving downlink control information, and device
EP3013093B1 (en) Terminal device, integrated circuit, and wireless communication method
CN111918397A (en) Channel monitoring method and device
EP2838298A1 (en) Method and device for data transmission
US9867061B2 (en) Method of handling measurement pattern for TDD system and related communication device
CN104935402B (en) The method, apparatus and equipment that subband CQI is reported are carried out in LC-MTC user equipmenies
EP3051738A1 (en) Method for monitoring a user equipment specific search space, user equipment, a node and a computer program product
CN110024463B (en) Combination of remaining system information PDCCH
JP2021103861A (en) Terminal device, base station device, and communication method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information
CB02 Change of applicant information

Address after: No. 388, ningqiao Road, Pudong New Area free trade test area (Shanghai)

Applicant after: Shanghai NOKIA Baer Limited by Share Ltd

Applicant after: Alcatel Optical Networks Israe

Address before: 201206 Pudong New Area Jinqiao Ning Road, Shanghai, No. 388

Applicant before: Shanghai Alcatel-Lucent Co., Ltd.

Applicant before: Alcatel Optical Networks Israe

GR01 Patent grant
GR01 Patent grant