WO2007015529A1 - 基地局装置、通信端末装置、およびマルチキャリア通信方法 - Google Patents
基地局装置、通信端末装置、およびマルチキャリア通信方法 Download PDFInfo
- Publication number
- WO2007015529A1 WO2007015529A1 PCT/JP2006/315329 JP2006315329W WO2007015529A1 WO 2007015529 A1 WO2007015529 A1 WO 2007015529A1 JP 2006315329 W JP2006315329 W JP 2006315329W WO 2007015529 A1 WO2007015529 A1 WO 2007015529A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cqi
- communication terminal
- base station
- time
- subchannel
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
-
- 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
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
-
- 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
- H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
Definitions
- Base station apparatus communication terminal apparatus, and multicarrier communication method
- the present invention relates to a base station apparatus, a communication terminal apparatus, and a multicarrier communication method.
- a communication terminal reports channel quality information called CQI (Channel Quality Indicator) to a base station, and the base station is based on the reported CQI.
- CQI Channel Quality Indicator
- MCS Modulation Coding Scheme
- the base station determines the number of allocated subcarriers for each communication terminal based on the reported CQI, and notifies this to each communication terminal. Then, each communication terminal selects the subcarriers for the number of allocated subcarriers from the better reception quality, and reports only the CQI of this subcarrier to the base station to report the amount of CQI information.
- Patent Document 1 International Publication WO 2005 Z020489 Pamphlet (Page 12, Lines 19-24) Disclosure of the Invention
- a communication terminal receives streaming video such as Internet TV, and a communication terminal simply browses the text of the web site and sends it by the communication terminal as if it were The data to be communicated is different, and the transmission rate is also different. Also, as a certain communication terminal performs real-time communication by voice and a certain communication terminal exchanges e-mails, real-time communication also differs depending on the communication terminal. As described above, the required quality (QoS: Quality of Service), specifically, the minimum transmission rate, the error rate, the allowable delay time, and the like differ depending on each communication terminal.
- QoS Quality of Service
- Patent Document 1 if the technology disclosed in Patent Document 1 is applied under an environment where QoS differs depending on the communication terminal, the number of subcarriers is uniformly limited for all communication terminals, so that the QoS is relaxed. While communication terminals with a lot of time can afford QoS with sufficient time, there is a problem that QoS is severe (remaining time for allowable delay time is short) and communication terminals can not satisfy QoS. Thus, the throughput of the communication system is reduced.
- an object of the present invention is to provide a base station apparatus, a communication terminal apparatus, and a multi-carrier communication method capable of improving frequency utilization efficiency while satisfying QoS and improving the throughput of the communication system. It is.
- the base station apparatus is an allocation unit for allocating a subchannel to the communication terminal based on the CQI reported from the communication terminal, and a remaining time with respect to an allowable delay time of data transmitted by the communication terminal.
- a configuration comprising: determination means for determination, and instruction means for instructing the communication terminal having the remaining time of a predetermined time or more to report CQI for the allocated subchannel is adopted.
- FIG. 1 A block diagram showing the main configuration of a base station apparatus according to Embodiment 1.
- FIG. 2 A block diagram showing the main configuration inside the allocation control information generation unit according to Embodiment 1.
- FIG. 3 A diagram specifically showing the relationship between the packet timeout value Pt and the frame timing.
- FIG. 5 A flowchart showing the outline of the processing procedure of the allocation control information generation unit according to the first embodiment. 6) A table showing how the CQI reported by the communication terminal according to the first embodiment changes 7) A block diagram showing the main configuration of the communication terminal according to the first embodiment
- FIG. 13 A diagram showing an example of a frequency assignment management table according to the first embodiment.
- FIG. 23A A diagram for explaining switching of the CQI reporting method according to the second embodiment.
- FIG. 23B A diagram for explaining switching of the CQI reporting method according to the second embodiment.
- FIG. 24A A diagram showing the result of simulation verification of the effect of the embodiment 2.
- FIG. 24B A diagram showing the result of simulation verification of the effect of the second embodiment
- FIG. 25 A diagram showing a relationship between format instruction information according to Embodiment 3 and remaining time with respect to allowable delay time Z transmission rate Z reception fluctuation determination information
- FIG. 26A A diagram showing how the CQI reported by the communication terminal according to Embodiment 3 changes.
- FIG. 26B A diagram showing how the CQI reported by the communication terminal according to Embodiment 3 changes.
- FIG. 27 A flowchart showing the processing procedure of the CQI generation unit according to the third embodiment.
- FIG. 28A A diagram for describing switching of a CQI reporting method according to a third embodiment.
- FIG. 28B A diagram for illustrating switching of the CQI reporting method according to the third embodiment.
- FIG. 1 is a block diagram showing a main configuration of a base station apparatus according to Embodiment 1 of the present invention.
- the subchannel is a generic term for a band consisting of single or multiple subcarriers, and is a control unit of frequency scheduling (frequency assignment) and adaptive modulation.
- the base station apparatus mainly consists of transmitting section 100, receiving section 110, and antenna 120.
- the transmission unit 100 includes a switching unit 101, an encoding unit 102, a modulation unit 103, an IFFT unit 104, a GI insertion unit 105, and a transmission RF unit 106.
- the reception unit 110 includes a reception RF unit 111, GI.
- a removal unit 112, an FFT unit 113, a demodulation unit 114, a decoding unit 115, a CQI extraction unit 116, and an allocation control information generation unit 117 are provided.
- Switching section 101 switches either information of transmission data or allocation control information output from allocation control information generating section 117 and outputs the information to encoding section 102.
- Coding section 102 applies error correction coding to the transmission data or assignment control information output from switching section 101 according to the coding rate included in the assignment control information output from assignment control information generation section 117 and obtains
- the encoded signal is output to the modulation unit 103.
- Modulating section 103 performs multilevel modulation such as QPSK and 16 QAM on the encoded signal output from encoding section 102 based on the modulation multilevel number included in the allocation control information output from allocation control information generation section 117. Modulate every subchannel.
- the IFFT unit 104 performs inverse fast Fourier transform (IFFT) on the signal modulated for each subchannel, and multiplexes the signal using a plurality of orthogonal carriers.
- GI insertion section 105 inserts a guard interval (GI) into the multiplexed signal output from IFFT section 104 in order to reduce intersymbol interference (ISI) due to delayed waves.
- Transmission RF section 106 converts the frequency band of the baseband signal output from GI insertion section 105 to a radio frequency (RF), and transmits it to the communication terminal from antenna 120.
- RF radio frequency
- Reception RF section 111 receives a signal from each communication terminal via antenna 120, and frequency-converts a radio frequency signal into a baseband signal.
- GI removing section 112 removes the guard interval from the baseband received signal.
- FFT B 113 tt applies fast Fourier transform (FFT) to the received signal from which guard intervals have been removed, and transforms it into data in the frequency domain.
- the demodulation unit 114 demodulates the received signal output from the FFT unit 113 to obtain a demodulated signal.
- the decoding unit 115 performs error correction decoding on the demodulated signal output from the demodulation unit 114.
- CQI extraction section 116 extracts CQIs transmitted by each communication terminal from the reception information included in the decoded signal output from decoding section 115 and outputs this to allocation control information generation section 117.
- Allocation control information generation section 117 performs frequency allocation to each communication terminal using the CQI of each communication terminal output from CQI extracting section 116 and the remaining time until the allowable delay time of received data. Also determine the MCS parameters and format indication information. Allocation control information generation section 117 generates allocation control information by combining the determined identification information (ID) of allocation subchannels, the MCS parameter, and the format indication information, and switches this.
- the signal is output to unit 101, encoding unit 102, and modulation unit 103.
- the MCS parameter is a parameter such as the coding rate of error correction code, modulation multi-level number, repetition number, etc.
- the format instruction information is a frame former at the time of the next CQI report of the communication terminal. To specify the
- FIG. 2 is a block diagram showing the main configuration inside assignment control information generation section 117. As shown in FIG.
- the CQI of each of the communication terminals of the CQI extraction unit 116 is inputted, and from the QoS management unit (not shown) of the upper layer, the allowable delay time set in the data addressed to each communication terminal is input.
- Ru The allowable delay time is a time that is set according to the real time property required for the data, and is a time that can be waited until data reception, that is, the data is sent to the transmission queue of the base station The maximum delay time that is allowed for processing from storage to transmission until the communication terminal completes reception correctly.
- the memory 121 holds these data for a predetermined time, outputs the CQI to the frequency allocation unit 122 and the MCS extraction unit 123 according to the request, and permits the allowable delay time to the frequency allocation unit 122 and the format instruction information generation unit 124. Output to
- the frequency allocation unit 122 allocates a frequency to each communication terminal using the CQI and the allowable delay time, and assigns the subchannel ID of the allocated subchannel to the MCS extraction unit 123, and combines the allocation control information. Output to the unit 125 and the memory 121.
- MCS extraction section 123 After receiving the allocated sub-channel ID of each communication terminal output from frequency allocation section 122, MCS extraction section 123 determines the allocated sub-channel ID based on the CQI of each communication terminal output from memory 121. Extract the corresponding MCS parameters. The extracted MCS parameter is output to assignment control information combining section 125.
- Format designation information generation unit 124 calculates the remaining time to the allowable delay time of each data from the allowable delay time of the data addressed to each communication terminal output from memory 121. Specifically, by referring to the internal timer, the data is stored in the transmission queue to calculate the elapsed time of force, and the remaining time is calculated by subtracting the elapsed time from the allowable delay time. Then, format instruction information generating section 124 determines the calculated remaining time as a threshold, and outputs the format instruction information of the CQI frame according to the determination result to allocation control information combining section 125.
- the above-mentioned format instruction information is information specifying the format of a frame to be used at the time of CQI reporting at the communication terminal next time, and is, for example, “0” or “1”. Then, the format instruction information “0” corresponds to data with a small remaining time, and designates “the CQI reporting method of reporting CQI for all subchannels” to the communication terminal. Further, format instruction information “1” is data having a large remaining time, and corresponds to the case of the second and subsequent CQI reporting. Specify CQI report method to report CQI only.
- Allocation control information combining section 125 combines an allocation subchannel ID of each communication terminal, MCS parameter information of a subchannel corresponding to this ID, and format indication information indicating a frame format of CQI to be reported next. And generate allocation control information.
- the generated allocation control information is transmitted by the transmission unit 100 to each communication terminal.
- allocation control information generation section 117 can change the next CQI report method of the communication terminal depending on whether the remaining time for the calculated allowable delay time is long or short. It can. That is, allocation control information generation section 117 specifies the format of the C QI frame to be used at the time of the next CQI report by notifying the communication terminal of the format instruction information of the CQI frame, and in fact, next to the communication terminal It is possible to control SQ's CQI reporting method.
- allocation control information generation section 117 uses a packet timeout value Pt shown below as a remaining time with respect to an allowable delay time of each data.
- the packet timeout value Pt is a parameter representing the above-mentioned remaining time by the transmission frame timing interval (the number of frames). Then, if transmission is performed in a range that satisfies QoS, Pt takes a positive integer of 0 or more, and the target packet is not received normally by the communication terminal, and remains in the transmission queue of the base station. Each time a frame passes, it is decremented by one. If the packet timeout value becomes negative, the base station discards the packet.
- FIG. 3 is a diagram specifically showing the relationship between the packet timeout value Pt and the frame timing. Also, FIG. 4 is a diagram showing the correspondence between the allowable delay time of each data and the Pt value.
- the horizontal axis in FIG. 3 indicates time, and T_0 to T_N indicate transmission frame timing.
- Send queue The data present in are transmitted on a transmission frame interval basis.
- the transmission queue stores three data # 1 to # 3 shown in FIG. FIG. 4 shows that there are three data # 1 to # 3 in the transmission queue, and in FIG. 3 the current point is T_0.
- the allocation control information generation unit 117 performs size comparison with Pt, for example, using 2 as a threshold value, and when the Pt value is less than 2, determines that the data has a small remaining time with respect to the allowable delay time. Also, if the Pt value is 2 or more, it is determined that the data has a large remaining time with respect to the allowable delay time. If multiple data with different remaining time are to be transmitted to the same communication terminal, the Pt value of the data with the least remaining time is taken as the Pt value for that communication terminal.
- the force threshold described using the threshold value of 2 as an example is not limited to two.
- FIG. 5 is a flowchart showing an outline of a processing procedure of assignment control information generation section 117.
- Allocation control information generation section 117 determines whether the data to be transmitted by the communication terminal is that of the first communication or that of the second and subsequent communication (ST 1010). Then, if this data is for the first communication, it instructs the communication terminal to report CQI for all subchannels in the channel (ST 1020). If it is determined in ST1010 that it is the data for the second and subsequent communications, allocation control information generation section 117 calculates the remaining time for the allowable delay time of this data, and performs threshold determination on this time (ST1030). If it is determined that the remaining time is less than the threshold value, that is, the remaining time is short, it is instructed to report C QI for all subchannels (ST 1020).
- assignment control information generation section 117 instructs the communication terminal to report CQI only for the subchannel assigned this time by frequency assignment (ST1040).
- a more detailed flow of the processing procedure of allocation control information generation section 117 will be described later including the processing procedure of the entire base station.
- FIG. 6 is a diagram specifically showing how the CQI reported by the communication terminal changes according to the above instruction of the base station.
- the upper part of FIG. 6 shows a subchannel to be reported at the time of initial CQI reporting, or at the time of CQI reporting when the remaining time to the allowable delay time is short at the second and subsequent times.
- the CQI information reported in each subchannel includes MCS bits and SIR information.
- the base station transmits to the communication terminal a subchannel allocated this time, not all subchannels, Since only the CQI is reported, the amount of CQI information can be reduced.
- FIG. 7 is a block diagram showing a main configuration of a communication terminal apparatus according to the present embodiment, which communicates with the base station apparatus according to the above present embodiment.
- the same components as in the base station will be assigned the same reference numerals and descriptions thereof will be omitted.
- the configuration different from that of the base station is as follows: in the transmitting unit 150, in the switching unit 151, in the receiving unit 160, the channel estimation unit 161, the decoding unit 162, and the CQI generation unit 163.
- the switching unit 151 of the transmitting unit 150 differs from the switching unit 101 of the base station in the target signal. That is, switching section 151 switches either the transmission data or the information of the CQI frame output from CQI generating section 163 and outputs the result to coding section 102.
- the transmission path estimation unit 161 of the reception unit 160 uses the pilot signal included in the received signal.
- the channel quality (for example, SIR) is estimated for each subchannel, and the estimation result is output to CQI generating section 163.
- the basic operation of the decoding unit 162 is the same as that of the decoding unit 115 of the base station, but the signal subjected to the fast Fourier transform is error correction decoded and the decoded allocation control information is sent to the CQI generation unit 163.
- CQI generating section 163 generates a CQI frame using the channel quality information output from channel estimating section 161 and the allocation control information output from decoding section 162.
- FIG. 8 is a block diagram showing the main configuration inside CQI generation section 163. As shown in FIG.
- the MCS determination unit 171 determines MCS parameters based on the transmission path quality information for each subchannel output from the transmission path estimation unit 161 and the built-in MCS table. The determined MCS parameters are output to the memory 172.
- Memory 172 holds the MCS parameter of each subchannel determined by MCS determination section 171 and the corresponding subchannel ID, and outputs MCS information to report CQI generation section 174 in response to a request. .
- Allocation control information processing section 173 uses, from the allocation control information output from decoding section 162, sub-channel ro information to which frequency allocation has been made, and format instruction information for specifying the next report CQI frame format, and These two pieces of information are taken out and output to the report CQI generation unit 174.
- Reporting CQI generation section 174 generates a CQI frame from the allocation subchannel ID, the MCS information corresponding to this ID, and the format indication information. However, the reporting CQI generation unit 174 generates CQIs for all subchannels at the time of initial CQI reporting.
- FIG. 9 is a flow chart showing the processing procedure of the CQI generation section 163.
- CQI generation section 163 acquires channel quality information estimated by channel estimation section 161 (ST 3010), compares this with the MCS table, and determines the MCS parameter of each subchannel ( ST3020).
- allocation control information notified from the base station is checked (ST3030). If allocation control information has already been received, the process proceeds to ST3040 and allocation control information information is received. If not received, then CQIs are generated and reported for all subchannels included in the communication band (ST 3050). In ST3040, the format instruction information force S “0” is a force It is confirmed whether or not the format instruction information is 0, CQI is also generated for all subchannels (ST 3050). If it is not “0”, that is, if “1”, CQI is generated only for the subchannels assigned IJ according to the allocation control information notified from the base station ( ST3060).
- FIG. 10 is a sequence diagram summarizing a series of processes of the base station and the communication terminal according to the present embodiment.
- the communication terminal receives the pilot signal, estimates the channel quality of all subchannels, generates a C QI, and performs initial CQI report to the base station (ST 10).
- the base station having received the CQI report from each communication terminal performs frequency allocation and MCS parameter determination using these CQI reports (ST 20), and further, the remaining with respect to the allowable delay time of data for each communication terminal.
- the time is calculated, and the next CQI reporting method according to the remaining time is determined (ST30), and allocation control information indicating this is notified to each communication terminal (ST40).
- the communication terminal having received the allocation control information extracts format instruction information for specifying the next CQI reporting method from the allocation control information (ST 50).
- the base station After transmitting the allocation control information in ST40, the base station transmits data to each communication terminal (ST60).
- the communication terminal estimates channel quality of all subchannels using the pilot signal, and generates CQI only for the assigned subchannel based on the format indication information notified from the base station in ST 40 (ST 70). , This makes a second report to the base station (ST80) o
- FIG. 11 is a diagram showing an example of a frame format of allocation control information transmitted from the base station apparatus according to the present embodiment.
- the frame of allocation control information is mainly composed of three pieces of information: format indication information part, allocation subchannel ID part, and allocation MCS parameter (MCS parameter corresponding to allocation subchannel ID) part. Be done.
- the format indication information is placed at the beginning of the frame, and then the allocation subchannel ID and the allocation MCS parameter are alternately arranged. It is not a thing.
- FIG. 12 is a flowchart showing a series of processing procedures of the base station apparatus according to the present embodiment.
- the base station apparatus transmits a pilot symbol for channel quality estimation (ST 2010).
- ST 2010 check whether the communication terminal ID of the reported CQI exists in the memory 121 (check whether the stored power is stored (ST 2020), and if the communication terminal ID already exists in the memory 121, according to the format indication information, The CQI of the target sub-channel ID is updated (ST 2030) If the communication terminal ID does not exist in ST 2020, the communication terminal ID is newly added to memory 121, and the CQIs of all the sub-channels are held (ST 2040).
- the base station apparatus checks, among the communication terminal IDs present in memory 121, whether there is a communication terminal ID for which CQI has not been updated (ST 205). 0) If there is a communication terminal for which CQI has not been updated, the ID of the target communication terminal and the CQI stored in the memory 121 are deleted (ST 2060). Note that for communication terminals with a long CQI report cycle, CQI update is performed every corresponding cycle, so deletion of communication terminal IDs in cycles that do not correspond is not performed. If it is determined in ST2050 that there is no communication terminal for which the CQI has not been updated, then ST2060 is skipped.
- the base station apparatus performs frequency allocation (subchannel allocation) according to the CQI of each communication terminal and the allowable delay time (ST 2070). Then, for each communication terminal, it is checked whether there is a frequency-assigned subchannel (ST2080), and if there is a frequency-assigned subchannel terminal, the CQI is compared with the MCS table and the assignment subchannel The MCS parameter corresponding to the ID is determined (ST 2090). If there is no subchannel assigned to the communication terminal in ST2080, ST2090 is skipped.
- the base station apparatus determines the remaining time with respect to the allowable delay time of data addressed to each communication terminal (ST 2100), and if it is determined that the remaining time is short, The format instruction information is set to 0 (ST2110), and when it is determined that the remaining time is long, the format instruction information is set to 1 (ST2120).
- the base station apparatus performs allocation control by combining the allocated subchannel ID of each communication terminal, the MCS parameter of the subchannel corresponding to this ID, and the format instruction information.
- Information is generated and transmitted to each communication terminal (ST 2130), and transmission data for downlink is generated and transmitted according to the allocation control information of each communication terminal (ST 2140).
- FIG. 13 shows an example of a frequency assignment management table used at the time of frequency assignment.
- the case where the number of communication terminals is four will be described as an example.
- the base station apparatus generates this table from the CQI (MCS bit) of each communication terminal and the packet timeout value Pt indicating the remaining time with respect to the allowable delay time.
- This table aligns packet timeout values of communication terminals that have reported CQI in ascending order of power, and the base station apparatus according to the present embodiment uses this table to improve reception quality.
- the frequency assignment is performed in order from the subchannel (Sub CH) of the one with the larger MCS bit.
- communication terminal # 3 is assigned Sub_CH # 1
- communication terminal # 1 is assigned Sub_CH # 2.
- Communication terminal # 2 is assigned Sub_CH # N
- communication terminal # 4 is assigned Sub_CH # 3.
- FIGS. 14A to 14 C are diagrams for describing switching of the CQI reporting method according to the present embodiment.
- RM1 Report Method 1 refers to a C QI reporting method that reports CQIs of all subchannels
- RM2 Report Method 2 reports CQIs of only subchannels assigned by frequency allocation. It refers to the method, and indicates the CQI reporting method actually selected by hatching.
- FIG. 14A shows a case in which it is determined that the remaining time power to the allowable delay time of data for a certain communication terminal is small and the deviation is also small at the time of CQI reporting for the first time up to the third time. There is.
- this communication terminal reports CQIs of all subchannels
- the second CQI report reports all CQIs of all subchannels. Report the CQI. The same applies to the third time.
- FIG. 14B shows a case where it is determined that the remaining time to the allowable delay time of data for a certain communication terminal is large at the time of CQI reporting for the first time and for the third time.
- this communication terminal in the first CQI report, regardless of the remaining time, this communication terminal is capable of reporting the CQIs of all subchannels.
- this communication terminal In the second CQI report, this communication terminal has the frequency of the base station. Only CQIs of subchannels allocated by allocation, for example, subchannels # 2, # 3 and # 4 are reported. Also in the third CQI report, only the CQI of the subchannel allocated by the base station frequency allocation will be reported.
- the base station Since the subchannels for which the communication terminal reported CQI in the second time are only # 2, # 3, and # 4, the base station performs frequency allocation from among these three subchannels in the second time. Therefore, the number of subchannels allocated by the base station at the second time may be less than three, so the number of CQIs reported by the communication terminal at the third time may be less than three.
- FIG. 14C shows a case where the determination result of the remaining time of data addressed to a certain communication terminal shifts with the lapse of time. That is, this data is determined to have a large remaining time at the first and second CQI reporting points, but is determined to have a small remaining time due to the passage of time at the third reporting point. Therefore, the CQI reporting method is changed from RM1 to RM2. Even in the fourth and subsequent CQI reports, RM1 is selected because the remaining time of this data is only decreasing. As described above, the reason for changing the CQI reporting method over time is that the present invention aims to reduce the amount of CQI information to be reported while satisfying the allowable delay time.
- the base station transmits data with a large remaining time to the allowable delay time, that is, to a communication terminal to which data with a sufficient remaining time is available. It indicates that the second and subsequent CQI reports should be performed only for subchannels that have already been allocated. On the other hand, for data for which the remaining time is short, ie, data for which the remaining time can not be spared, it is requested to report CQI for all subchannels. This By limiting the subchannels to be subject to CQI reporting, it is possible to reduce the amount of CQI information, and strict QoS, communication terminals (data) and QoS are weak, communication terminals (data terminals (data terminals). And, because it changes the CQI reporting method, it is easy to meet QoS. Therefore, it is possible to improve uplink frequency utilization efficiency overall.
- the base station that can easily determine the remaining time with respect to the allowable delay time of the data addressed to the communication terminal. This is because the elapsed time in the base station transmission queue can be easily grasped.
- FIG. 15A and FIG. 15B show the results of quantitatively evaluating the effects of the present embodiment.
- the evaluation conditions are as follows: number of communication terminals: 10, number of subchannels: 32, MCS expression bit: 5, number of transmission frames: 5.
- FIG. 15A is a graph showing the total amount of CQI information of all communication terminals with respect to the occupancy rate (C. D. F.) of the communication terminal that is the destination of data having a large remaining time with respect to the allowable delay time.
- the plot P1 shows the result of the conventional method, and the plot P2 shows the result according to the present embodiment.
- FIG. 15B is a graph showing the reduction ratio of the amount of CQI information to C. D.F. As described above, it is understood that the present embodiment can reduce the amount of CQI information by 13% at the maximum.
- the base station apparatus instructs a communication terminal with a low transmission rate to report CQIs of a predetermined number of subchannels with good reception quality among all the subchannels.
- the basic configuration of the base station apparatus according to the present embodiment is the same as the base station apparatus shown in Embodiment 1, the description thereof is omitted, and an assignment control information generation unit having a different configuration is provided. Will be described below.
- basic actions are the same, but components that differ slightly in detail are indicated by attaching the same number to lower case letters of the alphabet.
- FIG. 16 is a block diagram showing the main configuration of allocation control information generation section 117 a according to the present embodiment. Note that this allocation control information generation unit 117a has the same basic configuration as the allocation control information generation unit 117 described in the first embodiment, and the same components are assigned the same reference numerals. , I omit the explanation.
- Allocation control information generation section 117 a uses the CQI of each communication terminal output from CQI extraction section 116, the allowable delay time of received data, and the required transmission rate to obtain frequency allocation, MCS parameters, and so on. , And determine the format instruction information.
- the difference from Embodiment 1 is that the parameters output from the QoS management section in the upper layer are two, the allowable delay time and the requested transmission rate, and the reception variation in the CQI report from each communication terminal. There are two points: receiving reports including the reception fluctuation judgment information that indicates the status.
- the CQI extraction unit 116 outputs the CQI (MCS parameter and reception fluctuation determination information) from each communication terminal to the memory 121.
- the memory 121 acquires the required transmission rate for the received data of each communication terminal from the QoS management unit (not shown) of the upper layer, records this, and, if necessary, the frequency allocation unit 122 and output to the format instruction information generation unit 124a.
- the reception fluctuation determination information is also output from the memory 121 to the format instruction generation unit 124a.
- Frequency allocation section 122 performs frequency allocation in consideration of the required transmission rate of each communication terminal.
- the format instruction information generation unit 124a determines format instruction information using three parameters of the remaining time, the required transmission rate, and the reception fluctuation determination information.
- FIG. 17 is a flow diagram showing an outline of the processing procedure of the assignment control information generation unit 117a.
- Allocation control information generation section 117 a determines whether the data to be transmitted by the communication terminal is that of the first communication or that of the second and subsequent communication (ST 4010). Then, if this data is for the first communication, it instructs the communication terminal to report CQIs to all subchannels in the channel (ST 4020).
- allocation control information generation section 117 determines the requested transmission rate of this data as the first threshold and determines the first threshold (ST 4010). 30) If it is determined that the transmission rate is lower than the first threshold, that is, the transmission rate is low, then the remaining time for the allowable delay time of this data is calculated, and this is determined as the second threshold and the threshold.
- the reception variation is determined as the third threshold (ST 4050), and the reception variation (as reception variation) More specifically, if the reception SIR variance value of the subchannel is less than the third threshold, that is, if it is determined that the reception variation is gradual, the CQI of n subchannels with good reception quality is reported, more specifically, It is instructed to select n subchannels from the one with better reception quality and report the CQI of the subchannel corresponding to the selected subchannel ID and ID (ST 4060). If it is determined that the reception fluctuation is not gradual, the process proceeds to ST4020.
- the CQI reporting method of the communication terminal that receives data with a low transmission rate may be “report CQI of all subchannels” or “the reception quality is good”. This is in order to select n subchannels from one side and determine the power of “report CQI for the selected subchannel”.
- allocation control information generation section 117 a further performs threshold determination of the remaining time to the allowable delay time of this data with the second threshold (ST 4070). If it is determined that the time is short, the process proceeds to ST4020, and if it is determined that the remaining time is large, it instructs to report the CQI only for the subchannel allocated by frequency allocation this time (ST4080). If it is determined in ST4040 that the remaining time is large, the process proceeds to ST4080.
- Figs. 18A to 18C specifically show differences in the reported content of CQI reported by the communication terminal according to the above instruction of the base station.
- FIG. 18A shows subchannels to be reported by the CQI reporting method of ST4020.
- the communication terminal reports CQIs for all subchannels of subchannel numbers 0 to (N — 1) included in the bandwidth of the communication line, and also reports reception fluctuation determination information.
- FIG. 18B shows a subchannel to be reported by CQI report of ST 4080.
- the communication terminal reports CQIs only for the subchannels of subchannel numbers 1 and 2 assigned by the current frequency assignment, and also reports on reception fluctuation determination information. I tell you.
- FIG. 18C shows a subchannel to be reported by CQI report of ST 4060.
- the frame format of the allocation control information transmitted from the base station apparatus according to the present embodiment is the same as that of Embodiment 1, but the format instruction information is “2”, ie, “reception quality”. The difference is that information is added as “good, then n CQIs in the n subchannels”.
- the determination of whether the required transmission rate is high or low uses the number of allocated request subchannels. For example, if the number of requested assignment subchannels is less than two, it is determined that the requested transmission rate is low speed data. In addition, when the number of request allocation subchannels is 2 or more, it is determined that the required transmission rate is high speed data.
- FIG. 19 is a view showing the correspondence between format instruction information according to the present embodiment and remaining time / requested transmission rate / reception fluctuation determination information with respect to allowable delay time.
- the reception fluctuation determination information indicates the reception fluctuation degree of each communication terminal.
- “0” indicates a gradual reception fluctuation
- “1” indicates a severe reception fluctuation.
- the “one” shown in the column of the reception fluctuation determination information in FIG. 19 means that “0” or “1” may be used.
- FIG. 20 is a diagram showing a frame format for transmission rate information notification transmitted from a base station apparatus according to the present embodiment.
- the base station uses this to notify each communication terminal whether the required transmission rate is high or low.
- Transmission rate notification includes scheduling information (including allocation control information, modulation parameters, data size, information necessary for demodulating data, etc.) to be subjected to reception processing prior to data transmission. Also, notify on other control channels.
- the communication terminal according to the present embodiment has the same basic configuration as the communication terminal shown in Embodiment 1, and thus detailed description will be omitted. The difference is that, in addition to control information, requested transmission rate information is output to CQI generation section 163a (a configuration similar to that of CQI generation section 163).
- FIG. 21 is a block diagram showing a main configuration inside CQI generation section 163a according to the present embodiment.
- the same components as those of CQI generating section 163 shown in Embodiment 1 are assigned the same reference numerals and descriptions thereof will be omitted.
- the reception fluctuation determination information determination unit 271 calculates the average and the dispersion of the transmission path quality information (SIR value) for each sub-channel output from the transmission path estimation unit 161. Then, based on the calculated variance value of SIR, reception fluctuation determination information (“0” or “1”) is determined and output to the report CQI generation unit 174 a.
- SIR value transmission path quality information
- the communication terminal reports reception fluctuation information which is a parameter indicating the degree of reception fluctuation of the communication terminal which is not divided by only the MCS parameter at the time of CQI reporting.
- the reception variation determination information determination unit 271 determines reception variation determination information based on the variance values of the SIRs of all the subchannels.
- reception judgment information for example, (dispersion value of reception SIR of all subchannels) ⁇ 3.0, it is judged that the reception fluctuation is moderate and the reception fluctuation judgment information is set to “0”. Do. If (dispersion value of reception SIRs of all subchannels) ⁇ 3.0, it is determined that the reception fluctuation is severe, and the reception fluctuation judgment information is set to “1”.
- Reporting CQI generation section 174a generates a CQI frame according to the format indication information. At the time of initial CQI reporting, CQI is generated based only on the requested transmission rate and the reception fluctuation determination information.
- FIG. 22 is a flowchart showing the processing procedure of the CQI generation unit 163a. Only the procedure different from the flow of CQI generation section 163 shown in Embodiment 1 will be described.
- CQI generation section 163a determines whether the format indication information is 1 or not (ST5010), and if format indication information is received, CQIs are generated only for the subchannel assigned by the assignment control information notified from the base station (ST 3060). Format indication information force S 'l' was not In the case where the format indication information is “2”, CQI is generated for n sub-channels of good reception quality (ST 5020).
- FIG. 23A and FIG. 23B are diagrams for describing switching of the CQI reporting method according to the present embodiment.
- RM1 and RM2 are as described in Embodiment 1, and RM3 refers to a CQI reporting method in which CQIs of n subchannels are reported in order from the best reception quality, and it is actually selected.
- the hatched CQI reporting methods will be shown.
- the difference from Embodiment 1 is that the request transmission rate is also taken into consideration in addition to the remaining time, and one of RM1 and RM3 may be selected.
- the details are the same as in the first embodiment, so the description will be omitted.
- CQIs reported by the communication terminal are subchannels for n channels in the order of good reception quality among all subchannels. It is limited to the channel ID and the CQI of the subchannel corresponding to the ID. By this means, it is possible to reduce the amount of CQI information while satisfying the transmission rate of the communication terminal, and improve the uplink communication efficiency.
- a communication terminal determined to have a low transmission rate reports only CQIs for n channels in the order of good reception quality among all subchannels. Report the ID of this n channel.
- a communication terminal determined to have a low remaining time for allowable delay time and a transmission rate determined to be low reports the CQIs of all subchannels, but the number of actually allocated subchannels is small. As described above, by reporting only the CQI of the subchannel with good reception quality among all the subchannels, the subchannel actually assigned to the frequency may be a subchannel with good reception quality. The ability to reduce the amount of CQI information while increasing
- FIGS. 24A and 24B show the results of quantitatively evaluating the effects of the present embodiment.
- the evaluation conditions are the same as in the first embodiment, with the number of communication terminals: 10, the number of subchannels: 32, the MCS representation bits: 5, and the number of transmission frames: 5.
- FIG. 24A shows the communication end to which data having a large remaining time with respect to the allowable delay time is received. It is a graph showing the total amount of CQI information of all communication terminals with respect to the final occupancy rate (CDF).
- the plot P1, 2 is as described in the first embodiment, and the plot P3 shows the result according to the present embodiment.
- FIG. 24B is a graph showing the reduction ratio of the amount of CQI information to CDF.
- the base station apparatus according to Embodiment 3 of the present invention has more format indication information than the base station apparatus shown in Embodiment 2, that is, the CQI reporting method.
- CQI reporting method and format indication information “CQI of already allocated subchannel and n subchannels with good reception quality outside the allocated band are further added.
- the base station apparatus also has more cancellations than the reception fluctuation determination information in comparison with the second embodiment.
- the reception fluctuation determination information in Embodiment 2 has two values of “0 (reception fluctuation is gradual)” and “1 (reception fluctuation is severe)”
- the present embodiment There are three values of “0”, “1” and “2”, “0” indicates a gradual reception fluctuation, “1” indicates a somewhat severe reception fluctuation, and “2” indicates It shows that the reception fluctuation is severe. That is, it has an intermediate value (reception fluctuation is somewhat intense, status) as a further variation.
- the level of the reception fluctuation judgment information that “the reception fluctuation is a little severe” is newly added at the low transmission rate and the remaining time to the allowable delay time is short.
- the base station apparatus according to the present embodiment is the same as the base station apparatus shown in Embodiments 1 and 2. Since the basic configuration is the same, the description is omitted.
- FIG. 25 is a diagram showing the relationship between the format instruction information according to the present embodiment and the remaining time with respect to the allowable delay time Z request transmission rate Z reception fluctuation determination information.
- “1” can take any value of “0”, “1”, and “2”.
- the base station transmits a signal to the communication terminal. Transmit format instruction information "4". Therefore, this communication terminal reports CQI to the base station about the same subchannel as the previous CQI reporting. Furthermore, when it is determined that the reception fluctuation of the communication terminal that receives data requiring a slow transmission rate with a margin for remaining time with respect to the allowable delay time is determined to be rather severe, the base station requests the communication terminal for this communication terminal. , Transmit format instruction information "2". The CQI report of the format designation information “2” has been described in the second embodiment, and thus will not be described in detail here.
- FIG. 26A and FIG. 26B are diagrams specifically showing differences in CQI content reported by the communication terminal according to the above instruction of the base station.
- FIG. 26A shows sub-channels targeted for reporting of the CQI reporting method according to format designation information “3”.
- the communication terminal receives the CQIs of the subchannels of subchannel numbers 3 and 4 assigned by frequency assignment and the received products on the subchannels outside the frequency assignment band.
- the two subchannels (0, N-2) are selected in order of quality, and the CQI for this subchannel and the information for identifying the selected subchannel Sub-CH0, Sub-CH (N 1) Report the reception fluctuation judgment information.
- FIG. 26B shows a subchannel to be reported in the CQI reporting method according to the format designation information “4”.
- the communication terminal reports CQIs on subchannels 1 to 4 which are the same as subchannels 1 to 4 reported at the previous CQI report, and also reports reception fluctuation determination information.
- the communication terminal according to the present embodiment also has the same basic configuration as the communication terminal shown in Embodiments 1 and 2, the description will be omitted.
- FIG. 27 is a flowchart showing the processing procedure of the CQI generation unit. Only procedures different from the flows shown in the first and second embodiments will be described.
- the CQI generation section next judges whether or not the format designation information is 2 (ST7010), and if the format designation information is 2, reception quality is determined.
- the CQI is generated for n subchannels of good quality (ST 5020). If the format instruction information is not “2”, then it is judged whether or not the format instruction information is 3 (ST 7020). If the format instruction information is 3 ⁇ 4, the sub unit allocated from the base station C QI is generated for the channel and n subchannels with good reception quality outside the assigned band (ST 7030). If the format indication information is not 3, that is, if the format indication information is 4, CQI is generated for the same subchannel as the previous report (ST 7040).
- FIG. 28A and FIG. 28B are diagrams for describing switching of the CQI reporting method according to the present embodiment.
- RM:! To RM3 are as described in the first and second embodiments, and RM4 is the CQI of the subchannel to which the frequency assignment has been performed and is outside the assignment band and has good reception quality.
- RM4 is the CQI of the subchannel to which the frequency assignment has been performed and is outside the assignment band and has good reception quality.
- the CQI reporting method for reporting the CQI of n subchannels is shown.
- RM5 is the CQI reporting method for reporting the CQI for the same subchannel as the previously reported subchannel.
- RM1 to RM5 may be used in combination. For details I omit explanation.
- the base station in addition to the CQIs of the subchannels to which frequency assignment has been made, transmits to the communication terminal among the subchannels to which no assignment has been made.
- the base station By reporting the CQI of n subchannels from the better side, in frequency scheduling, it is possible to improve the freedom of channel selection when allocating data having a large allowable delay time and a high request transmission rate. .
- the base station is determined to have a high transmission rate, and to the communication terminal determined to have a large remaining time for the allowable delay time, the previously reported CQI is reported. Report the CQI of the same subchannel as the subchannel of. Also in this case, the degree of freedom in subchannel selection can be improved in frequency allocation.
- a communication terminal determined to have a large remaining time continuously may have a gradually usable subchannel area (degree of freedom of subchannel selection) narrowed.
- degree of freedom of subchannel selection degree of freedom of subchannel selection
- the base station apparatus, the communication terminal apparatus, and the multicarrier communication method according to the present invention are not limited to the above-described embodiments, and can be implemented with various modifications. It is also possible to implement in combination as appropriate.
- each embodiment a plurality of CQI reporting methods have been shown. Then, when the embodiments are combined, the present invention switches and uses a plurality of predetermined CQI reporting methods based on the remaining time with respect to the allowable delay time of the transmission data of each communication terminal, the transmission rate, and the transmission path environment. It can also be called an invention to
- the communication terminal determined to have a large remaining time for the allowable delay time at the previous CQI reporting has a small remaining time for the allowable delay time at the current CQI reporting. If it is determined that the “report CQI for all subchannels” is set, Switch to “Report CQI for n channels in order of good reception quality”.
- the present invention can determine the remaining time, etc. of each communication terminal each time, and can select an appropriate CQI reporting method. It is possible to reduce the amount of information of CQI while satisfying the rate.
- the base station apparatus and communication terminal apparatus according to the present invention can be described by describing the algorithm of the multicarrier communication method according to the present invention in a programming language and storing the program in memory and executing the program by information processing means. And similar functions can be realized.
- Each function block employed in the description of each of the aforementioned embodiments may typically be implemented as an LSI constituted by an integrated circuit. These may be individually integrated into a single chip, or may be integrated into a single chip to include some or all.
- LSI is used herein to mean “IC,” “system LSI,” “super LSI,” or “ultra LSI,” depending on the degree of integration.
- the method of circuit integration is not limited to LSI's, and implementation using dedicated circuitry or general purpose processors is also possible.
- FPGA field programmable gate array
- reconfigurable processor that can reconfigure connection or setting of circuit cells in the LSI.
- the base station apparatus, the communication terminal apparatus, and the multicarrier communication method according to the present invention can be applied to a mobile communication system of the OF DM scheme.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/997,699 US20090209261A1 (en) | 2005-08-03 | 2006-08-02 | Base station apparatus, communication terminal apparatus, and multicarrier communication method |
EP06782198A EP1901573A1 (en) | 2005-08-03 | 2006-08-02 | Base station apparatus, communication terminal apparatus, and multicarrier communication method |
BRPI0614259-1A BRPI0614259A2 (pt) | 2005-08-03 | 2006-08-02 | aparelho de estação de base, aparelho de terminal de comunicação, e, método de comunicação de múltiplas portadoras |
JP2007529514A JPWO2007015529A1 (ja) | 2005-08-03 | 2006-08-02 | 基地局装置、通信端末装置、およびマルチキャリア通信方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005225892 | 2005-08-03 | ||
JP2005-225892 | 2005-08-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007015529A1 true WO2007015529A1 (ja) | 2007-02-08 |
Family
ID=37708809
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/315329 WO2007015529A1 (ja) | 2005-08-03 | 2006-08-02 | 基地局装置、通信端末装置、およびマルチキャリア通信方法 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20090209261A1 (ja) |
EP (1) | EP1901573A1 (ja) |
JP (1) | JPWO2007015529A1 (ja) |
KR (1) | KR20080035595A (ja) |
CN (1) | CN101233774A (ja) |
BR (1) | BRPI0614259A2 (ja) |
RU (1) | RU2008104026A (ja) |
WO (1) | WO2007015529A1 (ja) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008115699A1 (en) * | 2007-03-20 | 2008-09-25 | Motorola, Inc. | Method and apparatus for resource allocation within a multi-carrier communication system |
WO2008120549A1 (ja) * | 2007-03-19 | 2008-10-09 | Sharp Kabushiki Kaisha | 移動通信システム、移動局装置、基地局装置及び移動通信方法 |
JP2008271201A (ja) * | 2007-04-20 | 2008-11-06 | Sharp Corp | 基地局装置、端末装置、無線通信システム、受信状態通知方法およびプログラム |
JP2008271205A (ja) * | 2007-04-20 | 2008-11-06 | Sharp Corp | 基地局装置、端末装置、通信システム及び通信方法 |
JP2008271200A (ja) * | 2007-04-20 | 2008-11-06 | Sharp Corp | 基地局装置、端末装置、無線通信システム、受信状態通知方法およびプログラム |
WO2008133185A1 (ja) * | 2007-04-20 | 2008-11-06 | Sharp Kabushiki Kaisha | 基地局装置、無線通信システム、端末装置、受信状態通知方法およびプログラム |
JP2008271199A (ja) * | 2007-04-20 | 2008-11-06 | Sharp Corp | 基地局装置、端末装置、無線通信システム、受信状態通知方法およびプログラム |
JP2008289147A (ja) * | 2007-05-16 | 2008-11-27 | Samsung Electronics Co Ltd | 周波数環境での遊休チャンネル検索方法及びその装置 |
JP2009517965A (ja) * | 2005-12-23 | 2009-04-30 | サムスン エレクトロニクス カンパニー リミテッド | チャネル品質情報報告のための方法及び装置 |
JP2009231908A (ja) * | 2008-03-19 | 2009-10-08 | Toshiba Corp | 無線通信端末 |
JP2010514372A (ja) * | 2006-12-20 | 2010-04-30 | インテル・コーポレーション | 無線システムに関するチャネル品質情報フィードバック技術 |
JP2010521088A (ja) * | 2007-02-28 | 2010-06-17 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | ワイヤレス電気通信ネットワークにおける隣接セルの自己設定および最適化 |
JP2011510592A (ja) * | 2008-02-03 | 2011-03-31 | エルジー エレクトロニクス インコーポレイティド | 無線通信システムにおけるcqi送信方法 |
JP2012074874A (ja) * | 2010-09-28 | 2012-04-12 | Kyocera Corp | 基地局と基地局の制御方法 |
JP2012074873A (ja) * | 2010-09-28 | 2012-04-12 | Kyocera Corp | 基地局と基地局の制御方法 |
JP2012514877A (ja) * | 2008-10-13 | 2012-06-28 | サムスン エレクトロニクス カンパニー リミテッド | Mimoシステムにおける動的フィードバックチャネル情報送信装置及びその方法 |
JP2013530559A (ja) * | 2010-04-05 | 2013-07-25 | クゥアルコム・インコーポレイテッド | ワイヤレス通信における非周期チャネル状態情報要求 |
US8626074B2 (en) | 2007-06-08 | 2014-01-07 | Canon Kabushiki Kaisha | Method for controlling a control station for determining a bandwidth for data communication |
JP2014523198A (ja) * | 2011-07-12 | 2014-09-08 | 中▲興▼通▲訊▼股▲ふぇん▼有限公司 | チャネルフィードバック情報の送信方法及びシステム |
EP2202901A4 (en) * | 2007-08-07 | 2015-09-23 | Sharp Kk | COMMUNICATION DEVICE AND METHOD FOR PRODUCTION OF RECEPTION QUALITY INFORMATION |
US9369967B2 (en) | 2009-04-21 | 2016-06-14 | Optis Wireless Technology, Llc | Terminal apparatus and retransmission control method |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070149132A1 (en) | 2005-12-22 | 2007-06-28 | Junyl Li | Methods and apparatus related to selecting control channel reporting formats |
WO2008132865A1 (ja) * | 2007-04-20 | 2008-11-06 | Sharp Kabushiki Kaisha | 基地局装置、端末装置、通信システム及び通信方法 |
KR101455981B1 (ko) * | 2007-08-14 | 2014-11-03 | 엘지전자 주식회사 | 하향링크 상황에 따른 적응적 채널 품질 지시자 생성 방법및 이를 위한 사용자 기기 |
US7974242B2 (en) * | 2007-10-25 | 2011-07-05 | Intel Corporation | Device, system, and method of channel quality indication |
US20090305715A1 (en) * | 2008-06-04 | 2009-12-10 | Motorola, Inc. | Channel quality reporting in a wireless communication system |
WO2010026936A1 (ja) * | 2008-09-04 | 2010-03-11 | シャープ株式会社 | 無線通信装置及び無線通信システム |
KR101640624B1 (ko) * | 2009-01-30 | 2016-07-19 | 삼성전자주식회사 | 연속 및 비연속 주파수 대역들에 걸친 송신을 위한 제어 시그널링 방법 및 장치 |
FR2942684B1 (fr) * | 2009-02-27 | 2012-12-28 | Commissariat Energie Atomique | Methode de signalisation de la qualite d'un canal de transmission. |
WO2010121642A1 (en) * | 2009-04-20 | 2010-10-28 | Nokia Siemens Networks Oy | Method and device for transmitting allocation information based on a received channel quality report |
US8531982B1 (en) * | 2009-11-09 | 2013-09-10 | Marvell International Ltd. | Quality of service aware channel quality indicator |
CN101908951B (zh) * | 2010-08-16 | 2016-05-11 | 中兴通讯股份有限公司 | 一种信道状态信息的报告方法及基站 |
WO2012042872A1 (ja) * | 2010-09-28 | 2012-04-05 | 京セラ株式会社 | 基地局及び基地局の制御方法 |
US8817647B2 (en) | 2011-02-15 | 2014-08-26 | Mediatek Inc. | Priority rules of periodic CSI reporting in carrier aggregation |
CN112910604B (zh) * | 2021-02-05 | 2022-09-02 | 展讯通信(上海)有限公司 | Cqi上报方法及装置、存储介质、终端 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005020489A1 (ja) | 2003-08-20 | 2005-03-03 | Matsushita Electric Industrial Co., Ltd. | 無線通信装置及びサブキャリア割り当て方法 |
JP2005159577A (ja) * | 2003-11-21 | 2005-06-16 | Toshiba Corp | 無線通信システム、移動通信端末装置、基地局装置および無線通信方法 |
JP2005204307A (ja) * | 2004-01-14 | 2005-07-28 | Samsung Electronics Co Ltd | 通信システムにおける干渉及び雑音推定装置及びその方法 |
JP2005225892A (ja) | 2001-06-22 | 2005-08-25 | Hiroyuki Yuya | 抗グリピカン3抗体を含む細胞増殖抑制剤 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6321158B1 (en) * | 1994-06-24 | 2001-11-20 | Delorme Publishing Company | Integrated routing/mapping information |
US6366856B1 (en) * | 2000-11-21 | 2002-04-02 | Qualcomm Incorporated | Method and apparatus for orienting a map display in a mobile or portable device |
US20030223396A1 (en) * | 2002-05-31 | 2003-12-04 | Tsai Shiau-He Shawn | Method of indicating the forward link serving sector in high data rate CDMA systems |
JP3512783B1 (ja) * | 2002-10-08 | 2004-03-31 | 松下電器産業株式会社 | 通信端末装置及び基地局装置 |
EP1557057A4 (en) * | 2002-11-01 | 2006-12-13 | Interdigital Tech Corp | METHOD FOR PREDICTING THE QUALITY OF THE WAY IN WIRELESS COMMUNICATION SYSTEMS |
TWI337018B (en) * | 2002-12-04 | 2011-02-01 | Interdigital Tech Corp | A base station for determinig a channel quality and the method thereof, and wireless transmit/receive unit |
WO2004073245A1 (de) * | 2003-02-14 | 2004-08-26 | Siemens Aktiengesellschaft | Verfahren zur datenübertragung |
KR100929094B1 (ko) * | 2003-09-20 | 2009-11-30 | 삼성전자주식회사 | 직교 주파수 분할 다중 접속 방식을 사용하는 이동 통신시스템에서 동적 자원 할당 시스템 및 방법 |
JP4088243B2 (ja) * | 2003-11-20 | 2008-05-21 | 松下電器産業株式会社 | 無線通信装置及び伝送レート予測方法 |
US9184898B2 (en) * | 2005-08-01 | 2015-11-10 | Google Technology Holdings LLC | Channel quality indicator for time, frequency and spatial channel in terrestrial radio access network |
-
2006
- 2006-08-02 RU RU2008104026/09A patent/RU2008104026A/ru not_active Application Discontinuation
- 2006-08-02 EP EP06782198A patent/EP1901573A1/en not_active Withdrawn
- 2006-08-02 JP JP2007529514A patent/JPWO2007015529A1/ja not_active Withdrawn
- 2006-08-02 KR KR1020087002733A patent/KR20080035595A/ko not_active Application Discontinuation
- 2006-08-02 BR BRPI0614259-1A patent/BRPI0614259A2/pt not_active Application Discontinuation
- 2006-08-02 CN CNA2006800277094A patent/CN101233774A/zh not_active Withdrawn
- 2006-08-02 WO PCT/JP2006/315329 patent/WO2007015529A1/ja active Application Filing
- 2006-08-02 US US11/997,699 patent/US20090209261A1/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005225892A (ja) | 2001-06-22 | 2005-08-25 | Hiroyuki Yuya | 抗グリピカン3抗体を含む細胞増殖抑制剤 |
WO2005020489A1 (ja) | 2003-08-20 | 2005-03-03 | Matsushita Electric Industrial Co., Ltd. | 無線通信装置及びサブキャリア割り当て方法 |
JP2005159577A (ja) * | 2003-11-21 | 2005-06-16 | Toshiba Corp | 無線通信システム、移動通信端末装置、基地局装置および無線通信方法 |
JP2005204307A (ja) * | 2004-01-14 | 2005-07-28 | Samsung Electronics Co Ltd | 通信システムにおける干渉及び雑音推定装置及びその方法 |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009517965A (ja) * | 2005-12-23 | 2009-04-30 | サムスン エレクトロニクス カンパニー リミテッド | チャネル品質情報報告のための方法及び装置 |
JP4732521B2 (ja) * | 2005-12-23 | 2011-07-27 | サムスン エレクトロニクス カンパニー リミテッド | チャネル品質情報報告のための方法及び装置 |
JP2010514372A (ja) * | 2006-12-20 | 2010-04-30 | インテル・コーポレーション | 無線システムに関するチャネル品質情報フィードバック技術 |
US20190021030A1 (en) | 2007-02-28 | 2019-01-17 | Unwired Planet, Llc | Self configuration and optimization of cell neighbors in wireless telecommunications |
US10123244B2 (en) | 2007-02-28 | 2018-11-06 | Unwired Planet, Llc | Self configuration and optimization of cell neighbors in wireless telecommunications |
US9432889B2 (en) | 2007-02-28 | 2016-08-30 | Unwired Planet, Llc | Self configuration and optimization of cell neighbors in wireless telecommunications |
US9661535B2 (en) | 2007-02-28 | 2017-05-23 | Unwired Planet, Llc | Self configuration and optimization of cell neighbors in wireless telecommunications |
US10536883B2 (en) | 2007-02-28 | 2020-01-14 | Unwired Planet, Llc | Self configuration and optimization of cell neighbors in wireless telecommunications |
US10785691B2 (en) | 2007-02-28 | 2020-09-22 | Unwired Planet, Llc | Self configuring and optimization of cell neighbors in wireless telecommunications networks |
US11317327B2 (en) | 2007-02-28 | 2022-04-26 | Unwired Planet, Llc | Self configuring and optimization of cell neighbors in wireless telecommunications networks |
JP2010521088A (ja) * | 2007-02-28 | 2010-06-17 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | ワイヤレス電気通信ネットワークにおける隣接セルの自己設定および最適化 |
WO2008120549A1 (ja) * | 2007-03-19 | 2008-10-09 | Sharp Kabushiki Kaisha | 移動通信システム、移動局装置、基地局装置及び移動通信方法 |
WO2008115699A1 (en) * | 2007-03-20 | 2008-09-25 | Motorola, Inc. | Method and apparatus for resource allocation within a multi-carrier communication system |
US8553594B2 (en) | 2007-03-20 | 2013-10-08 | Motorola Mobility Llc | Method and apparatus for resource allocation within a multi-carrier communication system |
JP2008271201A (ja) * | 2007-04-20 | 2008-11-06 | Sharp Corp | 基地局装置、端末装置、無線通信システム、受信状態通知方法およびプログラム |
JP2008271205A (ja) * | 2007-04-20 | 2008-11-06 | Sharp Corp | 基地局装置、端末装置、通信システム及び通信方法 |
JP2008271200A (ja) * | 2007-04-20 | 2008-11-06 | Sharp Corp | 基地局装置、端末装置、無線通信システム、受信状態通知方法およびプログラム |
JP2008271199A (ja) * | 2007-04-20 | 2008-11-06 | Sharp Corp | 基地局装置、端末装置、無線通信システム、受信状態通知方法およびプログラム |
WO2008133185A1 (ja) * | 2007-04-20 | 2008-11-06 | Sharp Kabushiki Kaisha | 基地局装置、無線通信システム、端末装置、受信状態通知方法およびプログラム |
JP2008289147A (ja) * | 2007-05-16 | 2008-11-27 | Samsung Electronics Co Ltd | 周波数環境での遊休チャンネル検索方法及びその装置 |
US8626074B2 (en) | 2007-06-08 | 2014-01-07 | Canon Kabushiki Kaisha | Method for controlling a control station for determining a bandwidth for data communication |
US8811364B2 (en) | 2007-06-08 | 2014-08-19 | Canon Kabushiki Kaisha | Method for controlling a control station, a method for controlling terminal station, a control station, a terminal station, and a computer readable storage medium |
EP2202901A4 (en) * | 2007-08-07 | 2015-09-23 | Sharp Kk | COMMUNICATION DEVICE AND METHOD FOR PRODUCTION OF RECEPTION QUALITY INFORMATION |
US8509168B2 (en) | 2008-02-03 | 2013-08-13 | Lg Electronics Inc. | Method for transmitting CQI in wireless communication system |
JP2011510592A (ja) * | 2008-02-03 | 2011-03-31 | エルジー エレクトロニクス インコーポレイティド | 無線通信システムにおけるcqi送信方法 |
JP2009231908A (ja) * | 2008-03-19 | 2009-10-08 | Toshiba Corp | 無線通信端末 |
JP2012514877A (ja) * | 2008-10-13 | 2012-06-28 | サムスン エレクトロニクス カンパニー リミテッド | Mimoシステムにおける動的フィードバックチャネル情報送信装置及びその方法 |
US9369967B2 (en) | 2009-04-21 | 2016-06-14 | Optis Wireless Technology, Llc | Terminal apparatus and retransmission control method |
US9854534B2 (en) | 2009-04-21 | 2017-12-26 | Optis Wireless Technology, Llc | Terminal apparatus and retransmission control method |
US10455516B2 (en) | 2009-04-21 | 2019-10-22 | Optis Wireless Technology, Llc | Terminal apparatus and retransmission control method |
US8638684B2 (en) | 2010-04-05 | 2014-01-28 | Qualcomm | Aperiodic channel state information request in wireless communication |
JP2013530559A (ja) * | 2010-04-05 | 2013-07-25 | クゥアルコム・インコーポレイテッド | ワイヤレス通信における非周期チャネル状態情報要求 |
JP2012074873A (ja) * | 2010-09-28 | 2012-04-12 | Kyocera Corp | 基地局と基地局の制御方法 |
JP2012074874A (ja) * | 2010-09-28 | 2012-04-12 | Kyocera Corp | 基地局と基地局の制御方法 |
JP2014523198A (ja) * | 2011-07-12 | 2014-09-08 | 中▲興▼通▲訊▼股▲ふぇん▼有限公司 | チャネルフィードバック情報の送信方法及びシステム |
US9265064B2 (en) | 2011-07-12 | 2016-02-16 | Zte Corporation | Method and system for transmitting channel feedback information |
Also Published As
Publication number | Publication date |
---|---|
CN101233774A (zh) | 2008-07-30 |
RU2008104026A (ru) | 2009-08-10 |
EP1901573A1 (en) | 2008-03-19 |
JPWO2007015529A1 (ja) | 2009-02-19 |
BRPI0614259A2 (pt) | 2012-01-24 |
KR20080035595A (ko) | 2008-04-23 |
US20090209261A1 (en) | 2009-08-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2007015529A1 (ja) | 基地局装置、通信端末装置、およびマルチキャリア通信方法 | |
JP5443462B2 (ja) | 下りチャネルに関する報告周期決定方法、下りチャネルに関する報告方法、送信機、及び受信機 | |
US9240877B2 (en) | Segment sensitive scheduling | |
US8660567B2 (en) | Radio communication apparatus and subcarrier assignment method | |
CN101286971B (zh) | 一种ofdm系统中的自适应帧长控制系统和方法 | |
US20090147869A1 (en) | Communication terminal apparatus, base station apparatus and reception quality reporting method | |
JP5209346B2 (ja) | 送信装置、送信方法、受信装置及び受信方法 | |
JP2004312291A (ja) | 基地局装置及び通信方法 | |
KR101656291B1 (ko) | 무선통신시스템에서 전송 효율을 개선하기 위한 장치 및 방법 | |
WO2006054697A1 (ja) | 通信装置、通信システム及び通信方法 | |
CN1498474A (zh) | 带有时分复用和载波选择加载的多载波通信 | |
TWI426723B (zh) | 於正交分頻多重存取符號中功率分佈之重新塑造 | |
US8243668B2 (en) | Method for allocating radio resource in wireless communication system and method for transmitting or receiving data using the same | |
EP2200387B1 (en) | Access control for cellular wireless communication | |
JP2023058618A (ja) | 基地局、受信方法及び集積回路 | |
EP2107700A1 (en) | Mobile communication system, terminal, base station device, and data communication method | |
US8630313B2 (en) | Signal mapping method and communication device | |
CN106688261A (zh) | 资源分配的方法、发送端设备和接收端设备 | |
Capozzi et al. | UTRAN LTE downlink system performance under realistic control channel constraints | |
Tran et al. | Optimized scheduling algorithm for LTE downlink system | |
CN102763462B (zh) | 基于优先级和信令功率的资源分配 | |
CN103688482A (zh) | 数据发送方法、装置及设备 | |
JP4476331B2 (ja) | 変調パラメータ選択方法、変調パラメータ選択装置及び通信装置 | |
KR100877746B1 (ko) | Ofdma기반의 무선통신 시스템에서 맵 구성 방법 및이를 이용한 프레임 전송 장치 | |
CN108712780A (zh) | 下行占用指示粒度的选择和确定方法、选择和确定装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200680027709.4 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2007529514 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006782198 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: MX/a/2008/001523 Country of ref document: MX |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008104026 Country of ref document: RU Ref document number: 202/MUMNP/2008 Country of ref document: IN Ref document number: KR |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11997699 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: PI0614259 Country of ref document: BR Kind code of ref document: A2 Effective date: 20080201 |