WO2009064135A2 - Procede et appareil d'attribution et de gestion de cqich - Google Patents

Procede et appareil d'attribution et de gestion de cqich Download PDF

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Publication number
WO2009064135A2
WO2009064135A2 PCT/KR2008/006730 KR2008006730W WO2009064135A2 WO 2009064135 A2 WO2009064135 A2 WO 2009064135A2 KR 2008006730 W KR2008006730 W KR 2008006730W WO 2009064135 A2 WO2009064135 A2 WO 2009064135A2
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Prior art keywords
cqich
power
allocation
class
allocating
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WO2009064135A3 (fr
Inventor
Jungnam Yun
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Posdata Co Ltd
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Posdata Co Ltd
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Priority claimed from KR1020080111201A external-priority patent/KR20090049994A/ko
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Publication of WO2009064135A2 publication Critical patent/WO2009064135A2/fr
Publication of WO2009064135A3 publication Critical patent/WO2009064135A3/fr
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

Definitions

  • the present invention relates to a channel allocation in a wireless communication system, and more particularly, to a method and apparatus for allocating and managing CQICH in a WiMAX system.
  • 'WiMAX' uses an orthogonal frequency division multiplexing (hereinafter, referred to as 'OFDM') and an orthogonal frequency division multiple access (hereinafter, referred to as 'OFDMA') uses radio resources allocated appropriately so as to improve efficiency in use of channels between a base station (hereinafter, referred to as 'BS' and a plurality of mobile stations (hereinafter, referred to as 'MS').
  • 'BS' base station
  • 'MS' a plurality of mobile stations
  • the radio resources of the WiMAX system using the OFDM/OFDMA methods are comprised of symbols on the time-axis and sub-carriers on the frequency- axis.
  • the efficiency in use of the channels depends on a method for allocating the sub- carriers to the MSs within a cell.
  • one frame includes downlink
  • 'DL' uplink sub-frames
  • 'UL' uplink sub-frames
  • the fore part of frame is provided with an MAP message region with configuration information of the frame, wherein an MAP message allocated to the MAP message region is comprised of a UL MAP message for UL and a DL MAP message for DL.
  • the DL MAP message includes DL_MAP_IE informing which MS includes data corresponding to DL data bursts transmitted from the BS, and a region at which data bursts of the specific MS are provided in the DL sub-frame. Also, the UL MAP message includes UL_MAP_IE informing a region at which UL data bursts of MS are provided in the UL sub-frame.
  • the DL sub-frame and UL sub-frame include control channels, which occupy about 10 to 15 percentage of the whole frame.
  • the whole frame including the DL sub-frame, UL sub-frame, and MAP region has a predetermined size. That is, if the control channels are increased in size, an amount of data to be transmitted is decreased. Accordingly, various methods has been attempted to minimize an overhead caused by an allocation of control channels in the whole frame, to thereby improve efficiency in use of radio resources.
  • a typical one among the control channels in the WiMAX system is a fast feedback region (hereinafter, referred to as 'FFB region').
  • the FFB region includes a channel quality indicator channel (hereinafter, referred to as 'CQICH') for transmission of a channel quality indicator (hereinafter, referred to as 'CQI'), which is mainly used for transmission of the CQI.
  • 'CQICH' channel quality indicator channel
  • 'CQI' channel quality indicator
  • the CQI is transmitted by each unit of slot, and the control channel for transmission of the CQI is referred to as the CQICH.
  • each MS creates the CQI by measuring a quality of channel, and transmits the created CQI to the BS every predetermined period. After receiving the CQI from the MS, the BS applies data modulation and encoding modes according to a channel state of each MS, so as to realize high data-transmission efficiency.
  • the BS receives more often CQI from each MS, it can provide more stable link adaptation for each MS.
  • CQI allocation should be optimized for the better link adaptation.
  • the present invention has been made in view of the above problems, and it is an object of the present invention to provide a method and apparatus for allocating and managing CQICH in consideration to limited radio resources.
  • Another object of the present invention is to provide a method and apparatus for allocating and managing CQICH, which is capable of allocating CQICH to a new MS trying to enter a network.
  • a method for allocating CQICH in a WiMAX system comprises classifying MSs into CQICH classes according to a UL Tx power report received from each MS; allocating a CQICH to the MS which requests a CQICH allocation according to the CQICH class; checking whether or not there is available CQICH in any one frame of predetermined frame period, when the new MS trying to enter a network requests the CQICH allocation; and allocating the CQICH to the new MS according to the result obtained by checking whether or not there is available CQICH, wherein the available CQICH is allocated to the new MS when there is the available CQICH, and the CQICH is allocated to the new MS by extending the period for CQICH allocation when there is no available CQICH.
  • classifying the MSs into the CQICH classes comprises calculating an average
  • Tx power and a standard deviation of Tx power for each MS through the use of Tx power report received from each MS; and determining the CQICH class corresponding to a CQICH allocation priority for each MS based on the average Tx power and standard deviation of Tx power calculated by each MS.
  • a method for managing CQICH in a wireless communication system comprises receiving a UL Tx power report from an MS; classifying a CQICH class corresponding to a CQICH allocation priority of the MS based on the UL Tx power report; and allocating or de-allocating the CQICH for each MS according to the CQICH allocation priority.
  • WiMAX system comprises an RRA configured to create a Tx power report by measuring a TX power of MS from a signal transmitted from the MS, and to receive a CQICH allocation request from the MS; a user information DB configured to store and manage the Tx power report for the MS in sequence, and to store and manage information about the new MS trying to enter a network; a CQICH requesting unit configured to receive a CQICH allocation request header through the RRA from the MS, and to transmit the received CQICH allocation request header to a UL control channel managing unit; the UL control channel managing unit configured to classify a CQICH class informing a CQICH allocation priority of the MS based on the Tx power report of the corresponding MS which requests the CQICH allocation, and determining the CQICH allocation for the corresponding MS which requests the CQICH allocation; and a UL MAP allocating unit configured to create an IE defined with the CQICH allocation for each MS according the CQICH allocation result of the UL control channel managing unit.
  • an apparatus for managing CQICH in a wireless communication system comprises an RRA configured to receive a UL Tx power report; and an RRC configured to classify MSs into CQICH classes corre- sponding to CQICH allocation priorities according to the UL Tx power report, and to allocate or de-allocate the CQICH for each MS according to the CQICH allocation priority.
  • a method and apparatus for allocating and managing CQICH according to the present invention have the following advantages.
  • the CQICH class for each MS is determined based on the UL Tx power report received from each MS, and the CQICH allocation is managed according to the CQICH class, resulting in the high transmission efficiency.
  • the CQICH frame period is extended to 2 frames, 4 frames, or 8 frames. Accordingly, the CQICH can be allocated to the new MS trying to enter the network without collision against the other MS allocated with CQICH.
  • FIG. 1 illustrates a frame of a WiMAX system.
  • FIG. 2 illustrates a CQICH allocation apparatus according to the embodiment of the present invention.
  • FIG. 3 is a flow chart illustrating a method for classifying CQICH classes in a
  • FIG. 4 is a flow chart illustrating a CQICH allocation method with a period of 1 frame.
  • FIG. 5 is a flow chart illustrating a CQICH allocation method with a period of 2 frames.
  • FIGs. 6 and 7 are flow charts illustrating a CQICH allocation method with a period of 4 frames.
  • FIGs. 8 and 9 are flow charts illustrating a CQICH allocation method with a period of 8 frames.
  • WiMAX system according to the present invention will be explained with reference to the accompanying drawings.
  • WiMAX system according to the present invention, CQI and CQICH in the WiMAX system will be explained in brief.
  • a BS determines a method for allocating radio resources to each MS based on feedback information transmitted from the plurality of MS. Also, the BS allocates and manages sub-channels in an entire burst region of UL sub-frames and DL sub-frames of a current frame for receiving/transmitting data from/to each MS. That is, after finding a wireless channel of highest performance for each MS, the wireless channel of highest performance is scheduled to be allocated to the user's MS, and is transmitted to the MS by allocating a data burst to the frame according to the schedule.
  • Each MS in the WiMAX system creates CQI by measuring a channel quality to inform a channel state to the BS, and transmits the created CQI to the BS periodically. For this, the MS transmits a request for allocating CQICH to the BS so as to transmit the CQI, and the BS allocates the CQICH to the MS so that the MS can transmit the CQI through the CQICH by a predetermined period.
  • CQICH class ifies CQICH classes (CQICH allocation priority) based on statistics of transmission power report (hereinafter, referred to 'UL Tx power report') from the MS, for example, based on an average TX power( ⁇ p ) and a standard deviation of Tx power( ⁇ p ), and allocates the CQICH for each MS according to the CQICH class.
  • CQICH allocation priority based on statistics of transmission power report (hereinafter, referred to 'UL Tx power report') from the MS, for example, based on an average TX power( ⁇ p ) and a standard deviation of Tx power( ⁇ p ), and allocates the CQICH for each MS according to the CQICH class.
  • TX power report is received from the MS, and the CQICH class (CQICH allocation priority) for each MS is determined based on the average Tx power( ⁇ p ) and standard deviation of Tx power( ⁇ p ). Then, it is determined whether or not the CQICH is allocated to the corresponding MS which requires the CQICH allocation according to the CQICH class (CQICH allocation priority).
  • the BS includes a CQICH allocation apparatus according to the embodiment of the present invention.
  • FIG. 2 illustrates the CQICH allocation apparatus according to the embodiment of the present invention.
  • the CQICH allocation apparatus 100 can control a ranging region, an ACK region, and an FFB region for transmission of CQI and non-CQI in a UL control channel.
  • the ranging region includes an initial region, a periodic transmission region, a bandwidth region, and a handover region.
  • the CQICH allocation apparatus 100 includes a radio resource controller (hereinafter, referred to as 'RRC) 200, a radio resource agent (hereinafter, referred to as 'RRA') 110, and a user information database 120.
  • the RRC 200 includes a frequency reuse controlling unit 210, a UL MAP allocating unit 220, a UL control channel managing unit 230, a CQICH requesting unit 240, and an HARQ managing unit 250.
  • the RRA 110 receives a CQICH allocation request header and UL data including network-entry request of new MS from the MS.
  • the RRA 110 provides the CQICH allocation request header received from the MS to the CQICH requesting unit 240 of the RRC 200.
  • the RRA 110 received the UL Tx power report.
  • TheUL Tx power report is provided to the user information database 120.
  • the Tx Power report may be generated by measuring a UL signal.
  • the network-entry request received from the MS is provided to the user information database 120.
  • the cases requesting the CQICH allocation are as follows. [48] First, the CQICH allocation is requested when the new MS enters the network. Second, the CQICH allocation is requested when the MS requests the additional CQICH allocation. Third, the CQICH allocation is requested when the BS determines the additional CQICH allocation. For the control of radio resource reuse, the BS can request the additional CQICH by other cases in addition to the aforementioned three cases.
  • the CQICH allocation apparatus 100 of FIG. 2 generates one output from three inputs, and allocates the CQICH to each MS which requires the CQICH allocation.
  • the CQICH allocation apparatus 100 generates control channel information of one parameter through the use of three parameters such as CQICH request, user information list, and ACKCH information.
  • the CQICH allocation is requested when the new MS enters the network.
  • the new MS requests the CQICH allocation so as to enter the network, wherein the request for CQICH allocation from the MS is updated in the user information database 120. All requests for CQICH allocation updated in the user information database 120 are provided to the UL control channel managing unit 230.
  • the CQICH requesting unit 240 requests the CQICH allocation request header of the MS.
  • the frequency reuse controlling unit 210 transmits a request for measuring a frequency reuse factor 1 (hereinafter, referred to as 'FRFl') or FRF3 to the CQICH requesting unit 240.
  • the ACKCH information corresponds to a channel allocated to the MS for supporting the HARQ.
  • the MS can transmit an ACK message to the BS through the ACKCH allocated from the BS.
  • the ACKCH for transmission of ACK information and the CQICH are allocated in the FFB region, wherein the ACKCH is not overlapped with the CQICH.
  • the control channel information created through the use of CQICH request, user information list, and ACKCH information is created in the UL control channel managing unit 230, and the created control channel information is provided to the UL MAP allocating unit 220 for creation of information element (hereinafter, referred to as 'IE').
  • the control channel information includes information about ranging region for
  • control channel information includes the FFB region and CQICH allocation information, and information about allocation of sounding region.
  • the user information database 120 stores the UL Tx power report sequentially transmitted from the RRA 110, and provides the stored UL Tx power report to the UL control channel managing unit 230.
  • the user information database 120 receives the network entry request, created by the initial network entry or handover of the MS, from the RRA 110, and stores the information about the network entry request of the new MS which requests the network entry.
  • the CQICH is allocated from the BS to the new MS trying to enter the network.
  • the user information database 120 provides the stored information about the network entry request of the new MS to the CQICH requesting unit 240 for the CQICH allocation.
  • the network entry request of new MS and the UL Tx power report stored in the user information database 120 is generated as the user information list, and the generated user information list is provided to the RRC 200.
  • the RRC 200 includes the frequency reuse controlling unit 210, the UL MAP allocating unit 220, the UL control channel managing unit 230, the CQICH requesting unit 240, and the HARQ managing unit 250.
  • the CQICH requesting unit 240 transmits a request for measuring the FRFl or FRF3 from the frequency reuse controlling unit 210 to the UL control channel managing unit 230.
  • the CQICH requesting unit 240 provides the information included in the
  • the CQICH allocation request header received from the RRA 110 to the UL control channel managing unit 230 so as to allocate the CQICH to the MS to be received with the CQICH allocation request header.
  • the CQICH allocation request header may include the CQICH allocation request information.
  • the HARQ managing unit 250 transmits a request for allocation of the ACKCH to the UL control channel managing unit 230 so that the corresponding MS can transmit the ACK message to the BS.
  • the UL control channel managing unit 230 allocates the CQICH to the corresponding MS through the use of CQICH allocation request information received from the CQICH requesting unit 240. After checking information included in the CQICH allocation request header, if the corresponding MS requests the CQICH allocation, the UL control channel managing unit 230 allocates the CQICH to the corresponding MS.
  • the UL control channel managing unit 230 determines the CQICH allocation for each MS which request the CQICH allocation.
  • the CQICH allocation for each MS is performed through the use of user information list provided from the user information database 120.
  • the UL control channel managing unit 230 calculates the average Tx power( ⁇ p ) and the standard deviation of Tx power( ⁇ p ) through the use of UL Tx power report included in the user information list provided from the user information database 120, and classifies the CQICH class for each MS based on the calculated average Tx power( ⁇ p ) and the standard deviation of Tx power ( ⁇ p ).
  • UL control channel managing unit 230 checks the slot of available CQICH in the current frame. If there is no available CQICH slot in the current frame, a frame period is changed(extended) for the CQICH allocation based on the CQICH class of each MS, and the CQICH is allocated to the corresponding MS which requests the CQICH allocation, according to the changed (extended) frame period of CQICH allocation.
  • the 230 calculates the average Tx power( ⁇ p ) and the standard deviation of Tx power ( ⁇ p ), but it is not limited to this.
  • the average Tx power( ⁇ p ) and the standard deviation of Tx power( ⁇ p ) may be calculated in the RRA 110 or user information DB 120.
  • the average Tx power( ⁇ p ) and the standard deviation of Tx power( ⁇ p ) are stored in the user information database 120, and are provided to the UL control channel managing unit 230.
  • the ACKCH After receiving the ACKCH allocation request from the HARQ managing unit 250, the ACKCH is allocated to the corresponding MS which requests the ACKCH allocation. Then, the information related with the ACKCH allocation of the corresponding MS is provided to the UL MAP allocating unit 220.
  • the UL MAP allocating unit 220 allocates the IE to the UL MAP, wherein the IE is defined with the CQICH allocation for each MS according to the control channel information with the CQICH allocation for each MS.
  • the CQICH allocation in the CQICH allocation apparatus 100 is performed through the two steps: the first step of determining the priority of CQICH allocation for each MS, that is, classifying the CQICH class, and the second step of determining whether or not the CQICH is allocated to the corresponding MS in consideration to the CQICH class determined for each MS and the available CQICH slot in the frame.
  • the CQICH class is determined in the UL control channel managing unit 230, wherein the CQICH class (CQICH allocation priority) for each MS is determined based on the average Tx power( ⁇ p ) and the standard deviation of Tx power( ⁇ p ). Then, it is determined whether or not the CQICH is allocated to the corresponding MS according to the determined CQICH class (CQICH allocation priority).
  • the CQICH class is determined based on the average Tx power ( ⁇ p ) and the standard deviation of Tx power ( ⁇ p ).
  • the UL Tx power report is created for all MSs within the cell, wherein the UL Tx power report is made through the use of the average Tx power( ⁇ p ) and the standard deviation of Tx power( ⁇ p
  • the average Tx power( ⁇ p ) and the standard deviation of Tx power( ⁇ p ) can be calculated by the following math-figures 1 to 5.
  • the average Tx power( ⁇ p ) is calculated by the following math-figures 1 to 3.
  • TxPower[0] io[ TxPower ' » ' [0] - i> " » - ⁇ ] /10
  • Tx Power dB[0] is the Tx power reported from the MS and P norm dB is the normalized factor for QPSK ; decided by the MCS used for the Tx power report and Normalized C/N table or Normalized C/N override 2 TLV (UCD, type 177).
  • the discrepancy of Normalized C/N for the current MCS and QPSK Vi will be value for P normjB •
  • the average Tx power( ⁇ p ) is calculated by the following math-figure 2 using the Tx power changed to the linear scale according to the math-figure 1.
  • the average Tx power( ⁇ p ) is calculated from the Tx power values provided from each MS through the math-figures 1 to 3.
  • Tx power( ⁇ p ) The standard deviation of Tx power( ⁇ p ) can be calculated by the following math- figures 4 and 5.
  • the standard deviation of Tx power( ⁇ p ) can be calculated from the Tx power value provided from each MS through the math-figures 4 and 5.
  • the number of CQICH classes may be set below the number of frame periods for the CQICH allocation to the MS.
  • the MSs may be classified into 4 CQICH classes.
  • the high average Tx power implies that the MS is located apart from the BS or the
  • MS is located in the shading area, which makes signals from the MS need to be monitored by the BS more frequently due to the weak wireless channel of the corresponding MS.
  • the high standard deviation of Tx power implies that the MS is moving without being stationary.
  • the signals generated from the MS have to be monitored by the BS more frequently, to thereby enable the stable link for the corresponding MS.
  • the corresponding MS is provided with the higher average Tx power( ⁇ p ), the corresponding MS is provided with the higher priority of CQICH allocation, that is, the higher CQICH class.
  • the corresponding MS is provided with the higher priority of CQICH allocation, that is, the higher CQICH class.
  • FIG. 3 illustrates a method for classifying the CQICHs in the CQICH allocation method according to the embodiment of the present invention.
  • the UL control channel managing unit 230 monitors the user information list stored in the user information database 120 periodically in step SlOO.
  • the threshold average Tx power for CQICH classification( ⁇ p ) and threshold standard deviation of Tx power(F ⁇ ) are calculated by each MS through the use of Tx power for each MS included in the user information list stored in the user information database 120 in step S 120.
  • the CQICH class is determined based on the average Tx power( ⁇ p ) and the standard deviation of Tx power( ⁇ p ) calculated by each MS.
  • the CQICH classification method for one MS among the MSs within the cell will be explained as follows, wherein the same CQICH classification method will be applied to the other MSs within the cell.
  • first threshold average Tx power( ⁇ pl ) is higher than the value of second threshold average Tx power( ⁇ p2 ).
  • the CQICH allocation priority of the corresponding MS is determined as the third CQICH class (CQICH Class 3) in step S 154.
  • the CQICH allocation priority of the corresponding MS is determined as the fourth CQICH class (CQICH Class 4) in step S 156.
  • step S 160 the update for the current Tx power of each MS in the user information database 120 is on standby in step S 160.
  • the CQICH class for the CQICH allocation of each MS is re-determined by performing the aforementioned steps SlOO to S156.
  • the CQICH classification based on the average Tx power( ⁇ p ) and the standard deviation of Tx power( ⁇ p ) can be used to determine the priority of CQICH allocation for each MS.
  • Each CQICH class may be provided with the plurality of MSs. Also, the CQICH class indicating the priority of CQICH allocation for each MS can be re-determined whenever the UL Tx power report stored in the user information database 120 is changed.
  • the CQICH allocation method according to the present invention may be performed with the period of the minimum 1 frame to the maximum 8 frames, that is, with the period of 1 frame, 2 frames, 4 frames, or 8 frames.
  • the CQICH classification, and the average Tx power and standard deviation of Tx power calculated from the Tx power report are updated periodically.
  • FIG. 4 is a flow chart illustrating the CQICH allocation method with the period of 1 frame.
  • the base station controlling the cell including the new MS checks whether or not there is the available CQICH slot at the current point, so as to check whether or not there is the available CQICH to be allocated to the new MS in step S210.
  • the CQICH is allocated to the new MS which requests the CQICH allocation according to the regular order of channel index values. That is, among the CQICHs, the CQICH with the small channel index value is firstly allocated to the MS which requests the CQICH allocation when there is the available CQICH slot in the current frame.
  • the period of CQICH allocation for the new MS is set as 1 frame
  • the CQICH de-allocated by the first MS is allocated to the new MS which requests the CQICH allocation in step S240.
  • the base station can transmit a request for a report of CINR to the first MS through the use of feedback polling IE or REP_REQ message, and the first MS receiving the request for the report of CINR can report the CINR to the base station through the use of feedback header or REQ_RSP message.
  • the CQICH allocation method enables both the CQICH allocation and the CQICH de-allocation.
  • the CQICH may be allocated to the new MS which requests the CQICH allocation while extending the CQICH allocation period for the MSs included in the lowest CQICH class.
  • FIG. 5 is a flow chart illustrating the CQICH allocation method with the period of 2 frames.
  • CQICH allocation period of 1 frame, and 2 frames. If the CQICH allocation period is 1 frame, the steps S200 to S220 for allocating the CQICH when there is the available CQICH slot in the current frame are identical to those in the CQICH allocation method shown in FIG. 4, whose detailed explanation will be omitted.
  • the frame for allocation of the CQICH slot is designated through the frame offset.
  • the CQICH de-allocated by the second MS is allocated to the new MS which requests the CQICH allocation in step S320.
  • the base station can transmit a request for a report of CINR to the second MS through the use of feedback polling IE or REP_REQ message, and the second MS receiving the request for the report of CINR can report the CINR to the base station through the use of feedback header or REQ_RSP message.
  • FIGs. 6 and 7 illustrate the CQICH allocation method with the period of 4 frames.
  • the CQICH allocation method shown in FIGs. 6 and 7 considers the case having the CQICH allocation period of 1 frame, 2 frames, and 4 frames.
  • step S340 it is checked whether or not the frame available for the CQICH allocation with the period of 4 frames is found in step S340.
  • the frame for allocation of the CQICH slot is defined through the frame offset.
  • the CQICH de-allocated by the third MS is allocated to the new MS which requests the CQICH allocation in step S430.
  • the base station can transmit a request for a report of CINR to the third MS through the use of feedback polling IE or REP_REQ message, and the third MS receiving the request for the report of CINR can report the CINR to the base station through the use of feedback header or REQ_RSP message.
  • FIGs. 8 and 9 illustrate the CQICH allocation method with the period of 8 frames.
  • the CQICH allocation method shown in FIGs. 8 and 9 considers the case having the CQICH allocation period of 1 frame, 2 frames, 4 frames, and 8 frames.
  • step S450 it is checked whether or not the frame available for the CQICH allocation with the period of 8 frames is found in step S450.
  • the frame for allocation of the CQICH slot is defined through the use of frame offset differently set by each MS.
  • the CQICH de-allocated by the fourth MS is allocated to the new MS which requests the CQICH allocation in step S540.
  • the base station can transmit a request for a report of CINR to the fourth MS through the use of feedback polling IE or REP_REQ message, and the fourth MS receiving the request for the report of CINR can report the CINR to the base station through the use of feedback header or REQ_RSP message.
  • the CQICH class for each MS is determined based on the UL Tx power report received from each MS, and the CQICH allocation is managed according to the CQICH class, resulting in the high transmission efficiency.
  • the CQICH frame period is extended to 2 frames, 4 frames, or 8 frames. Accordingly, the CQICH can be allocated to the new MS trying to enter the network without collision against the other MS allocated with CQICH.
  • the CQICH of MS classified as the lowest CQICH class is deallocated, and the CQICH de-allocated by the MS classified as the lowest CQICH class is allocated to the new MS which requests the CQICH allocation.
  • the MS whose CQICH is de-allocated can transmit a request for a report of CINR to the MS through the use of feedback polling IE or REP_REQ message, and the MS receiving the request for the report of CINR can report the CINR to the base station through the use of feedback header or REQ_RSP message.
  • the aforementioned method for allocating CQICH according to the embodiment of the present invention can be implemented in a program command type executed by various computers, and can be recorded in computer-readable record media.
  • the computer-readable record media may include the program command, data file, and data architecture.
  • the program command recorded in the record media may be especially designed for the present invention, or may be used for those who are in a computer-software field.
  • the computer-readable record media include a hardware especially designed to store and execute the program command, for example, magnetic media such as hard disk, floppy disk and magnetic tape, optical media such as CD-ROM and DVD, magneto- optical media such as floptical disk, ROM, RAM, flash memory, and etc.

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Abstract

L'invention concerne un procédé et un appareil d'attribution et de gestion de canal d'informations de qualité de canal (CQICH). Le procédé selon l'invention consiste : à classer des stations mobiles par catégories de CQICH en fonction d'un rapport de puissance d'émission en liaison montante reçu de chaque station mobile; à attribuer un CQICH à la station mobile qui demande une attribution de CQICH, en fonction de la catégorie de CQICH; à vérifier si un CQICH est disponible ou non dans une trame, quelle qu'elle soit, d'une période de trame prédéterminée lorsqu'une nouvelle station mobile tentant de pénétrer dans un réseau demande l'attribution de CQICH; et à attribuer le CQICH à la nouvelle station mobile en fonction du résultat de la vérification de disponibilité de CQICH, l'étape d'attribution consistant à attribuer le CQICH disponible, le cas échéant, à la nouvelle station mobile ou à attribuer le CQICH à la nouvelle station mobile par extension de la période d'attribution de CQICH s'il n'y a pas de CQICH disponible.
PCT/KR2008/006730 2007-11-14 2008-11-14 Procede et appareil d'attribution et de gestion de cqich Ceased WO2009064135A2 (fr)

Applications Claiming Priority (4)

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US98806707P 2007-11-14 2007-11-14
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US20140036837A1 (en) * 2010-04-19 2014-02-06 Clearwire Ip Holdings Llc System and method for combined mac level message with cqi channel control message for channel feedback report

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JP4187940B2 (ja) * 2001-03-06 2008-11-26 株式会社エヌ・ティ・ティ・ドコモ パケット伝送方法及びシステム、並びにパケット送信装置、受信装置、及び送受信装置
KR20040096363A (ko) * 2003-05-09 2004-11-16 삼성전자주식회사 이동 통신 시스템의 기지국에서의 트래픽 스케줄링 장치및 방법
WO2006004355A1 (fr) * 2004-07-01 2006-01-12 Samsung Electronics Co., Ltd. Systeme et procede de transmission d'une information de commande en liaison montante dans un systeme de communication ofdma
KR100946878B1 (ko) * 2005-01-10 2010-03-09 삼성전자주식회사 통신 시스템에서 채널 품질 정보 채널 할당 시스템 및 방법

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140036837A1 (en) * 2010-04-19 2014-02-06 Clearwire Ip Holdings Llc System and method for combined mac level message with cqi channel control message for channel feedback report
US9166762B2 (en) * 2010-04-19 2015-10-20 Clearwire Ip Holdings Llc System and method for combined MAC level message with CQI channel control message for channel feedback report

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