JP4971637B2 - Sector allocation method, base station apparatus, mobile station apparatus, and radio communication system - Google Patents

Description

  The present invention relates to a sector allocation method for a base station apparatus to communicate with a mobile station apparatus in a wireless communication system, and in particular, a plurality of sectors are used, and a base station apparatus is connected to a specific mobile station apparatus. The present invention relates to a sector allocation method when performing inter-sector diversity for transmitting and receiving signals.

  Currently, the 3rd Generation Partnership Project (3GPP) is studying "Evolved UTRA (UMTS Terrestrial Radio Access)" that aims to achieve high-speed transmission, low delay, and low-cost wireless access based on IP (Internet Protocol). ing.

  According to “Evolved UTRA” under consideration, OFDM (Orthogonal Frequency Division Multiplexing) is adopted as a radio access method in the downlink direction, and further, peripheral cell (sector) interference is suppressed by low-rate channel coding and spreading gain due to spreading. By doing so, one-cell frequency repetition is realized. Also, each subcarrier in the band is divided into several subcarrier groups, and modulation schemes and coding rates are adjusted and resources are allocated to users based on the channel quality measurement results for each subcarrier group. On the other hand, single-carrier-based variable bandwidth allocation is adopted as the radio access scheme in the uplink direction, and 1-cell frequency repetition is realized by suppressing peripheral cell interference by low-rate channel coding and spreading gain by spreading. The frequency band to be used is divided into basic units called frequency blocks, and for each unit, line quality is measured, modulation scheme and coding rate are adjusted, and resources are allocated to users.

  Moreover, inter-sector diversity within the same base station has been proposed as one technique for realizing the “Evolved UTRA” (for example, Non-Patent Document 1). According to the following Non-Patent Document 1, a base station transmits data packets simultaneously from a plurality of sectors using the same scramble code to a user (mobile station) that performs inter-sector handover. The mobile station soft combines (synthesizes) data packets (signals) received from a plurality of sectors, and performs an FFT (Fast Fourier Transform) operation on the resulting signal. Even if soft combining is performed on signals received from a plurality of sectors, the shared data channels do not interfere with each other. Therefore, the received signals become signals with an increased number of multipaths, and the frequency diversity effect increases.

  As another conventional technique, a technique is proposed in which scheduling is performed so that mobile stations existing in the vicinity of adjacent sector edges do not perform uplink transmission at the same time (for example, Patent Document 1). According to the following Patent Document 1, the base station grasps the channel quality state of each mobile station for each sector, and determines the mobile station # 1 that can obtain the best channel quality in a certain sector (referred to as the first sector) as the first. Allocate to one sector. Then, by assigning another mobile station to another sector, the first sector to which mobile station # 1 is assigned is greatly affected (communication of other mobile stations interferes with communication of mobile station # 1). The other mobile stations are not assigned to other sectors. By doing this, it is possible to avoid simultaneous uplink transmissions between mobile stations that greatly interfere with other sectors, and to improve the uplink transmission throughput.

IEICE Communication Society B-5-46 (2005) "Multi-sector simultaneous transmission method using Soft-combining in Evolved UTRA downlink OFDM wireless access" JP 2003-304567 A

  Generally, the channel quality of a plurality of paths between a mobile station and a plurality of sectors fluctuates independently in time, so that the channel quality in each sector is often different from each other when viewed instantaneously. However, in the inter-sector diversity scheme (suggestion for inter-sector diversity within the same base station), a mobile station that is executing a handover always operates to perform soft combine. Therefore, when there is another mobile station with better path quality than the mobile station in the sector assigned to the mobile station being handed over, the sector is assigned to another mobile station with better channel quality. Despite the fact that the system throughput can be improved, the sector cannot be allocated to the other mobile station, and the effect of soft combine can be obtained at the moment when the difference in channel quality between paths is large. There is a problem that radio resources are used wastefully, and transmission from the base station interferes with other sectors.

  Furthermore, in the control method shown in Patent Document 1, there is a problem that transmission of downlink data is not considered, and processing for uplink data received at the base station is not described.

  The present invention has been made in view of the above, and efficiently sets a path with a mobile station (assigns a sector efficiently to the mobile station) and uses radio resources effectively. An object is to obtain a sector allocation method capable of performing

  In order to solve the above-described problems and achieve the object, a sector allocation method according to the present invention is a wireless communication system in which a base station apparatus has a plurality of sectors that it manages with respect to a specific mobile station apparatus. A sector allocation method for allocating at least one of them as a downlink sector, wherein the mobile station apparatus is based on downlink channel quality (downlink quality) of a sector managed by the base station apparatus, A downlink sector selection notification step of selecting at least one downlink sector candidate (downlink sector candidate), and notifying the selected downlink sector candidate to the base station apparatus; and A downlink sector assignment step of assigning at least one downlink sector to the mobile station apparatus.

  According to the present invention, it is possible to effectively use radio resources and improve system throughput.

  Embodiments of a sector allocation method according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a configuration example of a wireless communication system that implements a sector allocation method according to the present invention. This radio communication system includes a base station apparatus (hereinafter referred to as a base station) 1 and a mobile station apparatus (hereinafter referred to as a mobile station) 2, and the base station 1 uses a sector managed by the own station. To / from the mobile station 2 and the like.

  FIG. 2 is a diagram illustrating a configuration example of the mobile station 2 configuring the wireless communication system that implements the sector allocation method according to the first embodiment. The mobile station 2 includes a layer 1 processing unit 21, layer 2 processing units 23 and 26, a quality comparison unit 24, a quality information transmission unit 25, and an antenna 27. The layer 1 processing unit 21 includes a quality measuring unit 22.

  The layer 1 processing unit 21 performs reception signal decoding / demodulation processing, transmission signal modulation / coding processing, and the like, and transmits and receives signals via the antenna 27. When the quality measuring unit 22 of the layer 1 processing unit 21 receives the pilot signal transmitted from the base station, the channel quality (in the direction from the base station to the mobile station) in the downlink direction of the sector that has received the pilot signal ( Hereinafter, CQI: Channel Quality Indicator) is measured. When mobile station 2 is located near the edge of a sector and receives pilot signals of a plurality of sectors of the same base station in order to execute inter-sector handover, the CQIs (downward) of all the sectors are measured. To do. The layer 2 processing units 23 and 26 perform transmission control processing when transmitting and receiving signals. The quality comparison unit 24 that operates as a downlink sector candidate selection unit executes processing described later, generates channel quality feedback information, and outputs it to the quality information transmission unit 25. The quality information transmitting unit 25 operating as a downlink sector candidate notifying unit transmits channel quality feedback information to the base station periodically or when requested by the base station.

  Here, the operation in which the quality comparison unit 24 generates the line quality feedback information will be described with reference to FIG. FIG. 3 is a flowchart illustrating an operation example in which the quality comparison unit 24 updates the contents of the downlink sector selection bitmap included in the channel quality feedback information. Note that the sector selected in the downlink sector selection bitmap (sector corresponding to the bit that is turned ON) is a candidate for the sector (downlink sector) that receives the downlink signal transmitted from the base station.

  When the quality comparison unit 24 receives CQI values for a plurality of sectors from the quality measurement unit 22, the quality comparison unit 24 creates a list in which sector numbers corresponding to the received CQI values are arranged in descending order of CQI values (step S11). For example, the sector number of the highest CQI value is stored in the area SecN (0) of the list, the sector number of the second highest CQI value is stored in the area SecN (1), and the sector number of the third highest CQI value is stored. Store in area SecN (2). Thereafter, the same processing is performed for sectors corresponding to all CQI values received from the quality measurement unit 22. Next, the quality comparison unit 24 uses the sector number (CQI value) stored in the SecN (0) in the downlink sector selection bitmap for notifying the base station of the sector number of the sector to which allocation is requested. The bit corresponding to the highest sector number) is turned ON (step S12). Note that all bits are OFF in the initial state of the downlink sector selection bitmap. Next, the quality comparison unit 24 sets “1” to the counter value (i) of the counter for determining whether or not to end the content updating operation of the downlink sector selection bitmap (step S13). Next, the quality comparison unit 24 uses the sector CQI value (CQI (SecN (0))) corresponding to the sector number stored in the SecN (0) and the sector number stored in the SecN (1) (secondly). Compare the CQI value (CQI (SecN (1))) of the sector corresponding to the sector number having a high CQI value), and whether the difference (x1) is less than a predetermined threshold value (α). Is confirmed (step S14). When x1 is larger than α (CQI (SecN (1)) + α> CQI (SecN (0))) (step S14, No), the process is terminated. On the other hand, when x1 is α or less (step S14, Yes), the quality comparison unit 24 turns on the bit corresponding to the sector number stored in SecN (1) in the downlink sector selection bitmap. (Step S15). Then, the quality comparison unit 24 increments the counter (i) (step S16), and has i reached the total number of sectors (the number of active sets) notified in advance from the base station in communication with the mobile station 2? It is confirmed whether or not (step S17). If the number of Active Sets has been reached (step S17, Yes), the process is terminated. If the number of Active Sets has not been reached (No at Step S17), the process proceeds to Step S14. Hereinafter, for the sector corresponding to SecN (i), whether the counter value (i) reaches the number of active sets (step S17, Yes), or confirms that x1 is greater than α in step S14 ( The above-described processing (steps S14 to S17) is executed up to step S14, No). As a result of this processing, the sector having the best channel quality (CQI value) and the sector having the channel quality within the predetermined threshold (α) from the channel quality are selected (the bit corresponding to the selected sector is turned ON). ) A downlink sector selection bitmap is obtained. The threshold value (α) may be fixed to the system, or may be dynamically changed adaptively. The quality comparison unit 24 then obtains the CQI value (maximum CQI value) corresponding to the sector number stored in the downlink sector selection bitmap and Sec (0) obtained by executing the above-described processing (the processing shown in FIG. 3). ) Is output as channel quality feedback information. FIG. 4 is a diagram illustrating an example of channel quality feedback information.

  Next, the operation of the base station 1 will be described with reference to FIG. FIG. 5 is a diagram illustrating a configuration example of the base station 1 configuring the wireless communication system that implements the sector allocation method according to the first embodiment. This base station includes a layer 1 processing unit 11, a quality information acquisition unit 13, a scheduling unit 14, a layer 2 processing unit 15, and sector antennas 16 to 18. The layer 1 processing unit 11 includes a pilot signal transmission unit 12.

  The layer 1 processing unit 11 performs reception signal decoding / demodulation processing, transmission signal modulation / coding processing, and the like, and transmits and receives signals via the sector antennas 16 to 18. The pilot signal transmission unit 12 periodically generates and transmits a reference signal (pilot signal) for the mobile station to measure the quality of the received signal. The quality information acquisition unit 13 that operates as a downlink sector candidate information acquisition unit acquires channel quality feedback information included in a signal transmitted from each accommodated mobile station. The scheduling unit 14 that operates as a downlink sector allocating unit includes a maximum CQI value included in the channel quality feedback information acquired by the quality information acquisition unit 13 or a QoS (Quality of Service) request for user data notified from the upper network. Based on the value or the like, a mobile station as a transmission destination is selected at the next signal transmission timing, and a sector (for transmitting a signal) is assigned to the mobile station. The operation of allocating sectors will be described later. The layer 2 processing unit 15 performs transmission control processing when transmitting and receiving signals.

  Here, the operation of the scheduling unit 14 assigning (scheduling) sectors to the mobile station will be described with reference to FIG. FIG. 6 is a flowchart illustrating an operation example in which the scheduling unit 14 allocates sectors.

  The scheduling unit 14 refers to the downlink sector selection bitmap included in the channel quality feedback information received from the quality information acquisition unit 13, and grasps the selection desired sector (candidate for the downlink sector to be allocated) of the mobile station to which the sector is allocated. (Step S21). Specifically, in the downlink sector selection bitmap, the sector number corresponding to the bit that is turned ON is grasped as the selection desired sector. Next, the scheduling unit 14 refers to a “sector allocation table” indicating information related to sectors allocated to other mobile stations, and grasps the allocated sector numbers (step S22). Next, the scheduling unit 14 confirms whether or not the sector to be selected has already been assigned to another mobile station (step S23), and if it has already been assigned (step S23, Yes), terminates the assignment process to the mobile station. Yes (no sector assigned). On the other hand, when the selection desired sector is not assigned to another mobile station (step S23, No), the scheduling unit 14 assigns the selection desired sector to the mobile station (step S24), and “sector assignment table”. Is updated (step S25).

  Next, an operation example in which the base station 1 configuring the radio communication system that implements the sector allocation method according to the present invention allocates sectors to the mobile station 2 will be described. Here, an operation example in which the mobile station 2 having three sectors as active (selectable) sectors requests the base station 1 to allocate sectors will be described with reference to FIG. Here, FIG. 7 is a diagram illustrating an outline of an operation example in which a base station allocates sectors to mobile stations. In FIG. 7, the upper part shows the CQI measurement result (quality measurement result) of each sector (sectors # 0 to # 2) in the mobile station 2, and the middle part shows the channel quality transmitted from the mobile station 2 to the base station 1. The content of the feedback information is shown, and the lower part shows the scheduling result of the base station 2 (sector allocation result for the mobile station 2). In the channel quality feedback information in the middle stage, the sector selection result indicates the number of the sector selected in the above-described downlink sector selection bitmap (the number of the sector corresponding to the bit turned ON).

  First, the mobile station 2 transmits to the base station 1 channel quality feedback information (downlink sector selection bitmap and maximum CQI value) obtained by the quality comparison unit 24 executing the above-described processing. The scheduling unit 14 of the base station 1 that has received the channel quality feedback information receives the sector selection result (the sector corresponding to the bit turned ON in the downlink sector selection bitmap) and the sector assigned to another mobile station. A sector is allocated (scheduled) to the mobile station 2 based on the situation or the like. However, for convenience of explanation, in the example shown in FIG. 7, it is assumed that the scheduling priority for the mobile station 2 is the highest (scheduling is performed based only on the sector selection result). In FIG. 7, in the first slot (the slot shown on the left) where the sector selection results are “0” and “1”, the base station 1 selects sectors # 0 and # 1 as they are, and these sector # The same data (signal) is transmitted from 0 and # 1, and the mobile station 2 synthesizes (soft combines) two systems of received data (signal). In the next slot, since the sector selection result is “0”, the base station 1 transmits data only from sector # 0. Further, in the next slot, the sector selection result indicates all sectors. Therefore, the base station 1 transmits the same data from all sectors, and the mobile station 2 combines the three systems of received data. Thereafter, the base station 1 transmits the same data from the selected sector to the mobile station 2 based on the channel quality feedback information (sector selection result). Note that a sector that is not selected for data transmission to the mobile station 2 (for example, sector # 2 in the first slot) can be assigned to another mobile station that does not receive interference from the assigned sector.

  Next, an example in which the base station assigns sectors to a plurality of mobile stations based on the state of channel quality (CQI) at a certain time timing will be described with reference to FIG. FIG. 8 is a diagram illustrating an example of a state in which a base station managing a plurality of sectors allocates sectors to a plurality of mobile stations. In the example shown in FIG. 8, it is assumed that mobile station A has the same (and relatively good) CQI for the paths in sectors # 0 and # 1, while the CQI for the path to sector # 2 is low. At this time, it is assumed that the mobile station B has a low CQI for each path of sectors # 0 and # 1, and a better CQI for the path of sector # 2. In such a case, the base station transmits signals to mobile station A from sectors # 0 and # 1. At this time, the base station transmits a signal for mobile station B from sector # 2. As described above, for the mobile station B, the signals transmitted from the sectors # 0 and # 1 do not interfere with the signal transmitted from the sector # 2 because the path CQI is low. Similarly, the signal transmitted from sector # 2 does not interfere with the signal transmitted to mobile station A.

  Next, an example in which the base station allocates sectors to a plurality of mobile stations based on the CQI state at a time timing different from that shown in FIG. 8 will be described with reference to FIG. FIG. 9 is a diagram illustrating an example of a state in which a base station managing a plurality of sectors allocates sectors to a plurality of mobile stations. In the example shown in FIG. 9, the mobile station A has a relatively good CQI of the path of sector # 1, and the CQI of the paths of sectors # 0 and # 2, and the mobile station B has a CQI of the path of sector # 2. Is relatively good and the CQI of the paths of sectors # 0 and # 1 is low, and mobile station C has a relatively good CQI of the path of sector # 0 and low CQIs of the paths of sectors # 1 and # 2 . In such a case, the base station transmits a signal from sector # 0 to mobile station C, transmits a signal from sector # 1 to mobile station A, and from sector # 2 to mobile station B. Send a signal. As described above, for mobile stations A, B, and C, only the signals transmitted from sectors # 1, # 2, and # 0 have good path CQIs. Therefore, the signals transmitted to the respective mobile stations do not interfere with each other, and all of the mobile stations A, B, and C can communicate with the base station satisfactorily.

  As shown in FIGS. 8 and 9, by dynamically changing the mobile station assigned to the sector based on the CQI state of the path, a combined gain is obtained when the CQI difference is small, while the CQI difference is When is large, different mobile stations can be allocated, and the system throughput can be improved.

  In this embodiment, the case where one sector is allocated to one mobile station in one unit time has been described. However, the present invention is not limited to this. One sector may be assigned to a plurality of mobile stations. In this case, quality measurement and quality comparison are performed independently for each frequency block, and based on the result, a scheduling operation is performed in which several frequency blocks (of the same channel quality) are collectively assigned to one mobile station. Further, several frequency blocks of different sectors can be collectively allocated to one mobile station. Note that it is possible to divide a sector into a plurality of frequency units and assign the frequency block to a mobile station as a frequency block, not only in the present embodiment but also in an embodiment described later.

  Further, the quality measuring unit 22 may measure “CQI value assuming a case where signals transmitted from a plurality of sectors are combined on the receiving side”.

  Further, when the quality measuring unit 22 measures the “CQI value assuming that signals transmitted from a plurality of sectors are combined on the receiving side”, the quality comparing unit 24 selects “synthesized” when selecting a sector. The sector may be selected using the “CQI value assuming the case”. Specifically, the “CQI value assuming the combined case” is corrected to a low value because of the large use of resources (= sectors), and then compared with the “CQI value in a single sector”. The sector or combination of sectors when the CQI value is the highest is set as the selected sector. Alternatively, after obtaining the amount of data that can be transmitted with the “CQI value assuming a combined case” and correcting it low because of the use of many resources (= sectors), the “CQI value in a single sector” Comparison processing is performed with the amount of data that can be transmitted, and the sector or combination of sectors that can transmit the largest amount of data is set as the selected sector. As a result of the comparison, when it is determined that the “CQI value assuming the case of combining” is the highest and a combination of sectors that realizes this is selected, the quality comparison unit 24 assumes the “case of combining” “CQI value” is set in the channel quality feedback information and output.

  In the above description, the same effect can be obtained even if the sector is replaced with an antenna beam (the antenna beam can be efficiently allocated to a plurality of mobile stations). Further, each sector does not need to be geographically identical (located in the vicinity). For example, it is possible to arrange each sector at a distance by using extension in layer 1 or cooperation between distributed schedulers in layer 2. Good.

  Further, in this embodiment, the sector allocation method during execution of inter-sector handover has been described. However, the present invention is not limited to this, and the mobile station and the base station execute the sector allocation operation described above even during normal communication operation. If necessary, signals may be transmitted / received in a plurality of sectors, and the reception side may synthesize (soft combine) the received signals. Similarly, the sector assignment operation (method) of the embodiment described later can be applied not only to the execution of the inter-sector handover but also to the normal communication operation, thereby improving the system throughput.

  As described above, in this embodiment, the base station determines whether to transmit the same signal from a plurality of sectors (signal) based on the channel quality feedback information (sector selection result) sequentially reported from the mobile station. Allocation of the sector to transmit) is performed dynamically. As a result, soft combining is performed only when the combined gain is high in the mobile station, and sectors can be allocated to other mobile stations when the combined gain is low, thereby effectively using radio resources and improving system throughput. Can be made.

Embodiment 2. FIG.
Next, the second embodiment will be described. The configuration of the wireless communication system that implements the sector allocation method of the present embodiment is the same as that of the wireless communication system of the first embodiment described above. In addition, the configurations of the base station and mobile station constituting the wireless communication system are the same as those of the base station and mobile station of the first embodiment described above. The sector allocation method according to the present embodiment allows one sector for a mobile station when the channel quality is sufficiently good (CQI is sufficiently large) even if the channel quality (CQI) in a plurality of sectors is similar. Is different from the first embodiment.

  First, the operation of the mobile station will be described. The mobile station of the present embodiment is different from the mobile station of the first embodiment described above only in the operation for generating the channel quality feedback information. Hereinafter, an operation in which the mobile station according to the present embodiment generates channel quality feedback information will be described with reference to FIGS. FIG. 10 is a flowchart illustrating an operation example in which the quality comparison unit of the mobile station according to the second embodiment generates channel quality feedback information. In the processing of the quality comparison unit of the mobile station according to the first embodiment (see FIG. 3) Step S31 is added. Therefore, the same processes as those shown in FIG. 3 are denoted by the same reference numerals and the description thereof is omitted.

  After executing step S12, the quality comparison unit 24 has a sector CQI value (CQI (SecN (0))) corresponding to the sector number stored in SecN (0) greater than a predetermined threshold (β). Whether or not (step S31). If “CQI (SecN (0))> β” (step S31, Yes), the process ends. In this case, in the downlink sector selection bitmap of the channel quality feedback information, only the bit of the sector corresponding to the sector number stored in SecN (0) is ON, and the maximum CQI value is CQI (SecN (0)). On the other hand, when “CQI (SecN (0)) ≦ β” (step S31, No), the processing of steps S13 to S17 is executed as in the first embodiment. The threshold value (β) may be fixed to the system, or may be dynamically changed adaptively.

  Based on the channel quality feedback information notified from the mobile station, the base station executes the same processing as the base station of the first embodiment described above, and allocates sectors to the mobile station. As described above, when there is a sector whose CQI value exceeds the threshold value (β), the mobile station selects only one sector, so the base station allocates one sector to the mobile station. . This is because sufficient reception quality can be ensured with only one sector, which makes it possible to allocate the remaining sectors to other mobile stations.

  Thus, in the present embodiment, when there is a sector with sufficiently good channel quality (CQI), the mobile station selects only the sector and does not select other sectors. Thereby, the base station can allocate sectors other than the selected sector to other mobile stations, and can improve the overall system throughput.

Embodiment 3 FIG.
Next, Embodiment 3 will be described. In the sector allocation method according to the present embodiment, the channel quality comparison processing (corresponding to the above-described channel quality feedback information generation processing) performed on the mobile station side in the first and second embodiments described above is performed on the base station side. This is different from the first and second embodiments. The configuration of the radio communication system that implements the sector allocation method of the present embodiment is the same as that of the radio communication system of the first embodiment described above.

  FIG. 11 is a diagram illustrating a configuration example of a mobile station configuring a wireless communication system that implements the sector allocation method according to the third embodiment. In this mobile station 2a, the quality comparison unit 24 is deleted from the mobile station 2 of the first embodiment, and the quality information acquisition unit 13a and the quality information transmission unit 25a are replaced with the quality information acquisition unit 13 and the quality information transmission unit 25. It becomes the composition provided with. In addition, the same code | symbol is provided about the part similar to the mobile station 2 of Embodiment 1, and the description is abbreviate | omitted.

  The quality information transmitting unit 25a transmits the downlink CQI value of the sector measured by the quality measuring unit 22 periodically or when requested from the base station as radio channel feedback information to the base station. The quality measuring unit 22 may measure “a CQI value assuming a case where signals transmitted from a plurality of sectors are combined on the receiving side”.

  When the mobile station 2a is located near the edge of a sector and the quality measuring unit 22 measures CQI values of a plurality of sectors in order to perform inter-sector handover, the quality information transmitting unit 25a Some CQI values are transmitted as radio link feedback information. Here, the quality information transmission unit 25a may transmit the “CQI value assuming that signals transmitted from a plurality of sectors are combined on the reception side” measured by the quality measurement unit 22 as the radio channel feedback information. Good. FIG. 12 is a diagram illustrating an example of the wireless line feedback information.

  FIG. 13 is a diagram illustrating a configuration example of a base station configuring a wireless communication system that implements the sector allocation method according to the third embodiment. This base station 1a has a configuration in which a quality comparison unit 31 is added to the base station 1 of the first embodiment described above. In addition, the same code | symbol is provided about the part similar to the base station 1 of Embodiment 1, and the description is abbreviate | omitted.

  The quality information acquisition unit 13a operating as a downlink quality acquisition unit acquires radio channel feedback information including a downlink CQI value. The quality comparison unit 31 of the base station 1a that operates as a downlink sector candidate selection unit, is based on the downlink CQI value included in the radio channel feedback information acquired by the quality information acquisition unit 13a, as described in the first or second embodiment. The same processing as that of the quality comparison unit 24 of the mobile station 2 is executed to determine candidate sectors to be allocated to the mobile station 2a (update the contents of the downlink sector selection bitmap). And the scheduling part 14 which operate | moves as a downlink sector allocation means performs the process similar to the scheduling part 14 of the base station 1 of Embodiment 1 mentioned above, and allocates a sector with respect to the mobile station 2a.

  When the quality measuring unit 22 measures the “CQI value assuming that signals transmitted from a plurality of sectors are combined on the receiving side”, the quality comparing unit 31 selects “synthesized” The sector may be selected using the “CQI value assuming the case”. Specifically, the “CQI value assuming the combined case” is corrected to a low value because of the large use of resources (= sectors), and then compared with the “CQI value in a single sector”. The sector or combination of sectors when the CQI value is the highest is set as the selected sector. Alternatively, after obtaining the amount of data that can be transmitted with the “CQI value assuming a combined case” and correcting it low because of the use of many resources (= sectors), the “CQI value in a single sector” Comparison processing is performed with the amount of data that can be transmitted, and the sector or combination of sectors that can transmit the largest amount of data is set as the selected sector. As a result of the comparison, when it is determined that the “CQI value assuming the case of combining” is the highest and a combination of sectors that realizes this is selected, the quality comparison unit 31 assumes the “case of combining” The CQI value ”is output to the scheduling unit 14.

  Thus, in the present embodiment, the base station performs the processing (processing for determining a candidate sector based on the CQI value) performed by the mobile station in the above-described first or second embodiment. We decided to reduce the processing of mobile stations. As a result, the circuit scale of the mobile station can be reduced and the power consumption can be suppressed while realizing the same effects as those of the first or second embodiment described above.

Embodiment 4 FIG.
Next, the fourth embodiment will be described. The sector allocation method according to the present embodiment includes a sector selection method when the base station according to the first to third embodiments transmits a downlink signal (data) (transmits a signal from the base station to the mobile station), and Is different. In the present embodiment, a method (sector allocation method) in which a base station allocates a sector (uplink sector) that receives an uplink signal based on an uplink CQI value of the sector will be described. The configuration of the radio communication system that implements the sector allocation method of the present embodiment is the same as that of the radio communication system of the first embodiment described above.

  FIG. 14 is a diagram illustrating a configuration example of a mobile station configuring a wireless communication system that implements the sector allocation method according to the fourth embodiment. This mobile station 2 b has a configuration in which a layer 2 control unit 52 is added to the mobile station 2 of the first embodiment described above and a layer 1 processing unit 21 b is provided instead of the layer 1 processing unit 21. The layer 1 processing unit 21 b includes a pilot signal transmission unit 51. In addition, the same code | symbol is provided about the part similar to the mobile station 2 of Embodiment 1, and the description is abbreviate | omitted.

  The pilot signal transmission unit 51 periodically generates and transmits a pilot signal used by the base station for CQI measurement in the uplink (sector uplink direction). The layer 2 control unit 52 controls the layer 2 processing unit 26 based on the uplink scheduling information received from the base station.

  FIG. 15 is a diagram illustrating a configuration example of a base station configuring a wireless communication system that implements the sector allocation method according to the fourth embodiment. In this base station 1b, a quality comparison unit 31b and a layer 2 processing unit 43 are added to the base station 1 of the first embodiment described above, and a layer 1 processing unit 11b and a scheduling are substituted for the layer 1 processing unit 11 and the scheduling unit 14. It becomes the structure provided with the part 14b. The layer 1 processing unit 11b includes a synthesis processing unit 41 and a quality measurement unit 42. In addition, the same code | symbol is provided about the part similar to the base station 1 of Embodiment 1, and the description is abbreviate | omitted.

  The quality measuring unit 42 of the layer 1 processing unit 11b measures the uplink CQI of each sector based on the pilot signal received from each mobile station in each sector. Further, the synthesis processing unit 41 synthesizes signals from the same mobile station received in a plurality of sectors as required in accordance with the instruction of the scheduling unit 14b. The quality comparison unit 31b that operates as an uplink sector candidate selection unit, based on the uplink CQI value measured by the quality measurement unit 42, indicates an uplink sector candidate that receives an uplink signal from a mobile station. Map "is generated. The procedure for generating this bitmap is the same as the procedure for generating the “downstream sector selection bitmap” by the quality comparison unit 31 of the base station of the third embodiment. Based on the CQI value measured by the quality measurement unit 42 or the QoS requirement value of traffic, the scheduling unit 14b operating as an uplink sector allocating unit determines which mobile station the next mobile station transmission timing (uplink signal transmission timing) To determine whether to permit transmission and to notify the mobile station of the determination result. At the same time, the scheduling unit 14b determines an uplink sector that receives an uplink signal from a mobile station that permits transmission. Specifically, the scheduling unit 14b refers to the uplink sector selection bitmap acquired from the quality comparison unit 31b and performs scheduling so as to receive a signal using a sector that is “selected” (bit is ON). To do. Then, no sector is allocated to other mobile stations that interfere with the selected sector (transmission is not permitted). Here, when a plurality of sectors are “selected”, the same signal (data) is received using all the selected sectors, and the received signals are combined by the combining processing unit 41. In addition, the scheduling unit 14b allocates a sector that is not selected in the uplink sector selection bitmap to a mobile station that does not interfere with the allocated sector (selected sector) and can obtain good quality. .

  Next, an example in which the base station 1b allocates sectors to a plurality of mobile stations based on the state of uplink quality (CQI) at a certain timing will be described with reference to FIG. FIG. 16 is a diagram illustrating an example of a state in which the base station 1b managing a plurality of sectors allocates a sector for uplink data transmission to a plurality of mobile stations. In the example shown in FIG. 16, it is assumed that the signals transmitted from mobile station A have the same (and relatively good) CQI in sector # 0 and sector # 1, while the CQI in sector # 2 is low. At this time, the signal transmitted from the mobile station B has a low CQI in the sector # 0 and the sector # 1, and a good CQI in the sector # 2. In such a case, the base station 1b receives and combines transmission signals (uplink signals) from the mobile station A in the sectors # 0 and # 1. At this time, the base station 1b receives the transmission signal from the mobile station B in the sector # 2. The CQI of the signal transmitted from the mobile station A and the signal transmitted from the mobile station B in each sector is in the relationship described above. Therefore, the signal transmitted from mobile station A does not interfere with the signal transmitted from mobile station B and received at sector # 2. Similarly, the signal transmitted from mobile station B does not interfere with the signals transmitted from mobile station A and received at sectors # 0 and # 1. As described above, the base station 1b can satisfactorily receive any of the signals transmitted from the mobile stations A and B.

  Next, an example in which the base station 1b allocates sectors to a plurality of mobile stations based on the CQI state at a time timing different from the case shown in FIG. 16 will be described with reference to FIG. . FIG. 17 is a diagram illustrating an example of a state in which the base station 1b managing a plurality of sectors allocates a sector for uplink data transmission to a plurality of mobile stations. In the example shown in FIG. 17, the signal transmitted from mobile station A has a relatively good CQI in sector # 1 and a low CQI in sectors # 0 and # 2, and the signal transmitted from mobile station B The CQI in # 2 is relatively good and the CQI in sectors # 0 and # 1 is low, and the signal transmitted from mobile station C has a relatively good CQI in sector # 0 and low CQI in sectors # 1 and # 2 Shall. In such a case, the base station 1b receives the transmission signal (uplink signal) from the mobile station A in the sector # 1, receives the transmission signal from the mobile station B in the sector # 2, and receives the transmission signal from the mobile station B in the sector # 0. A transmission signal from C is received. The CQI of each signal transmitted from the mobile stations A, B, and C in each sector has the relationship described above. Therefore, the signals transmitted from the respective mobile stations do not interfere with each other in sectors # 0 to # 2, and the base station 1b receives all the signals transmitted from the mobile stations A, B, and C satisfactorily. it can.

  Note that the sector allocation method when receiving the signal described in the present embodiment is the same as the sector allocation method (selecting sector for transmitting a downlink signal) of any of the first to third embodiments described above. It may be used in combination. That is, in the wireless communication system, the allocation method according to the present embodiment is used as a method for allocating a sector for receiving an uplink signal, using the allocation method according to any one of the first to third embodiments as a method for allocating a sector for transmitting a downlink signal. May be used.

  Further, the quality measuring unit 42 may measure “a CQI value assuming a case where signals received in a plurality of sectors are combined”.

  Further, when the quality measuring unit 42 measures the “CQI value assuming the case where signals received in a plurality of sectors are combined”, the quality comparing unit 31b assumes that “synthesized is assumed” when selecting a sector. A sector may be selected using “CQI value”. Specifically, the “CQI value assuming the combined case” is corrected to a low value because of the large use of resources (= sectors), and then compared with the “CQI value in a single sector”. The sector or combination of sectors when the CQI value is the highest is set as the selected sector. Alternatively, after obtaining the amount of data that can be transmitted with the “CQI value assuming a combined case” and correcting it low because of the use of many resources (= sectors), the “CQI value in a single sector” Comparison processing is performed with the amount of data that can be transmitted, and the sector or combination of sectors that can transmit the largest amount of data is set as the selected sector. As a result of the comparison, when it is determined that the “CQI value assuming the case of combining” is the highest and a combination of sectors that realizes this is selected, the quality comparison unit 31b assumes the “case of combining” The “CQI value” is output to the scheduling unit 14b.

  Thus, in the present embodiment, the base station has a combined gain of the received signal based on the sector selection result (uplink sector selection bit map) sequentially obtained every time the pilot signal transmitted from the mobile station is received. A signal transmitted from a mobile station is received in a plurality of sectors only when the frequency is high. As a result, soft combining is performed at the base station only when the combined gain is high, and resources can be allocated to other mobile stations when the combined gain is low, so that the system throughput can be improved.

Embodiment 5 FIG.
Next, the fifth embodiment will be described. In the sector allocation method according to the present embodiment, the base station transmits a signal by adjusting transmission power in consideration of a combined gain obtained by soft combining a plurality of received signals on the mobile station side. The configuration of the radio communication system that implements the sector allocation method of the present embodiment is the same as that of the radio communication system of the first embodiment described above. In addition, the configurations of the base station and mobile station constituting the wireless communication system are the same as those of the base station and mobile station of the first embodiment described above, and only the operation of the scheduling unit provided in the base station is different. Here, the operation of the scheduling unit different from the first embodiment will be described with reference to FIG. FIG. 18 is a flowchart showing an operation example in which the scheduling unit of the base station according to the fifth embodiment allocates sectors. Steps S41 and S42 are performed in the processing (see FIG. 6) of the scheduling unit of the base station according to the first embodiment described above. Is added. Therefore, the same processes as those shown in FIG. 6 are denoted by the same reference numerals and the description thereof is omitted.

  After executing Step S24, the scheduling unit confirms whether or not a plurality of sectors are allocated to the mobile station (Step S41). When only one sector is allocated (No at Step S41), the scheduling unit updates the sector allocation table (Step S25) and ends the process. On the other hand, when a plurality of sectors are allocated (step S41, Yes), the scheduling unit transmits the downlink signal with lower transmission power in each sector than when the base station allocates one sector and transmits a signal. Is scheduled to be transmitted (step S42). Then, the scheduling unit updates the sector allocation table (step S25) and ends the process. Thereby, when transmitting a downlink signal by allocating a plurality of sectors, it is possible to reduce interference that transmission in each sector gives to other communications.

  Similarly, when a plurality of sectors are allocated using the sector allocation method of the second or third embodiment, the base station may perform transmission with low transmission power. As a result, radio resources can be saved. Further, it may be executed in combination with the sector allocation method (selecting operation of a sector that receives an uplink signal) described in the fourth embodiment. Also, in the above step S42, instead of scheduling to transmit with low transmission power, transmission is performed using a small number of radio resources (for example, the frequency is divided into frequency blocks, and a part of them is allocated to transmit. It is good also as scheduling.

  Further, in the present embodiment, the sector allocation method when the base station transmits the downlink signal has been described. However, the present invention is not limited to this, and the sector allocation method when receiving the uplink data described in Embodiment 4 , Transmission power or radio resources may be adjusted. Thereby, the power consumption on the mobile station side can be suppressed.

  As described above, in this embodiment, in the present embodiment, when a plurality of sectors are allocated to one mobile station, the base station performs transmission with lower transmission power than usual and The interference with the sector is reduced, or transmission is performed with a small number of radio resources to save radio resources. Thereby, the throughput of the system can be increased.

Embodiment 6 FIG.
Next, the sixth embodiment will be described. In the sector allocation method of this embodiment, when the received signal is not soft-combined on the mobile station side (when only one sector is allocated), the base station transmits the transmission power in consideration of the influence (interference) received from other sectors. Adjust. The configuration of the radio communication system that implements the sector allocation method of the present embodiment is the same as that of the radio communication system of the first embodiment described above. In addition, the configurations of the base station and mobile station constituting the wireless communication system are the same as those of the base station and mobile station of the first embodiment described above, and only the operation of the scheduling unit provided in the base station is different. Here, the operation of the scheduling unit different from the first embodiment will be described with reference to FIG. FIG. 19 is a flowchart showing an operation example in which the scheduling unit of the base station according to the sixth embodiment allocates sectors. Steps S41 and S51 are performed in the processing (see FIG. 6) of the scheduling unit of the base station according to the first embodiment described above. Is added. Therefore, the same processes as those shown in FIG. 6 are denoted by the same reference numerals and the description thereof is omitted.

  After executing Step S24, the scheduling unit confirms whether or not a plurality of sectors are allocated to the mobile station (Step S41). When only one sector is allocated (No in step S41), the scheduling unit downloads at a higher transmission power than when a plurality of sectors are allocated in consideration of interference from other sectors and transmission is performed in each sector. Scheduling is performed so as to transmit a signal (step S51). Then, the scheduling unit updates the sector allocation table (step S25) and ends the process. On the other hand, when a plurality of sectors are allocated (step S41, Yes), the scheduling unit updates the sector allocation table (step S25) and ends the process. As a result, when a downlink signal is transmitted by assigning only one sector, it can be transmitted robustly without being influenced by other sectors (the reliability when transmitting a downlink signal can be improved). ).

  In addition, when one sector is allocated using the sector allocation method of the second or third embodiment, the base station may transmit with high transmission power. Thereby, the certainty at the time of transmitting data can be raised. Further, it may be executed in combination with the sector assignment method (sector assignment method for receiving an uplink signal) of the fourth embodiment. Furthermore, it may be executed in combination with the sector allocation method (scheduling operation) of the fifth embodiment.

  In step S51, instead of transmitting with high transmission power, more radio resources are used (for example, the frequency is divided into frequency blocks and the amount to be allocated is adjusted), and the coding rate is reduced. Alternatively, scheduling may be performed so that transmission is performed robustly, for example, by using a low-speed modulation method. At this time, in the case of the configuration as in Embodiment 3 in which the base station side can grasp the CQI of the path with other sectors on the mobile station side, it is also possible to calculate the transmission power value and coding rate to the optimum ones. It is.

  Further, in the present embodiment, the sector allocation method when the base station transmits the downlink signal has been described. However, the present invention is not limited to this, and the sector allocation method when receiving the uplink data described in Embodiment 4 , Transmission power or radio resources may be adjusted. Thereby, the certainty at the time of transmitting uplink data can be raised.

  Thus, in this embodiment, when transmitting by allocating one sector, the base station uses high transmission power or uses many radio resources, and changes the coding rate and modulation scheme. Changed to send. Thereby, data transmission can be performed with high quality without receiving interference from other sectors.

Embodiment 7 FIG.
Next, Embodiment 7 will be described. The sector allocation method according to the present embodiment will be described as a sector allocation method that operates in consideration of a case where the CQI is not reliable, such as when a mobile station is moving at high speed. The configuration of the radio communication system that implements the sector allocation method of the present embodiment is the same as that of the radio communication system of the first embodiment described above. Also, the base station configuration constituting the radio communication system is the same as the base station of the first embodiment described above, and only the configuration of the mobile station is different.

  FIG. 20 is a diagram illustrating a configuration example of a mobile station configuring a wireless communication system that implements the sector allocation method according to the seventh embodiment. The mobile station 2c is configured to include a layer 1 processing unit 21c and a quality comparison unit 24c instead of the layer 1 processing unit 21 and the quality comparison unit 24 of the mobile station 2 of the first embodiment. Further, the layer 1 processing unit 21c has a configuration in which a moving speed detection unit 61 is added to the layer 1 processing unit 21 of the mobile station 2 of the first embodiment. In addition, the same code | symbol is provided about the part similar to the mobile station 2 of Embodiment 1, and the description is abbreviate | omitted.

  The moving speed detector 61 that operates as a moving state detecting unit detects the moving speed of the mobile station 2c based on the change state of the propagation environment, the change state of the current position, and the like. The quality comparison unit 24 c generates channel quality feedback information and outputs it to the quality information transmission unit 25. Hereinafter, the operation of the quality comparison unit 24c will be described with reference to FIG. FIG. 21 is a flowchart showing an operation example in which the quality comparison unit 24c updates the contents of the downlink sector selection bit map included in the channel quality feedback information, and the processing of the quality comparison unit of the mobile station according to the above-described first embodiment ( Steps S61 and S62 are added to FIG. Therefore, the same processes as those shown in FIG. 3 are denoted by the same reference numerals and the description thereof is omitted.

  When the quality comparison unit 24c receives the CQI value from the quality measurement unit 22, the quality comparison unit 24c confirms whether or not the mobile station 2c is in a high-speed movement state by comparing the speed detection result of the movement speed detection unit 61 with a threshold value (step) S61). When the mobile station 2c is in a high-speed movement state (Yes in step S61), the quality comparison unit 24c determines that the received CQI value is not reliable, and sets the current active set (selectable sector number) in the downlink sector selection bitmap. ) All the bits corresponding to) are turned on, and the process is terminated (step S62). That is, the mobile station always selects all active sectors, and synthesizes (soft combines) the data received in all sectors. This is because the time variation of the CQI is so intense that it is not reliable and it is meaningless even if the base station refers to the CQI and the CQI judgment result. If it is determined in step S61 that the mobile station 2c is not moving at a high speed (No in step S61), the operation after step S11 (the same operation as the quality comparison unit of the mobile station in the first embodiment) is executed. To do.

  Further, in the present embodiment, the operation in consideration of the moving speed of the mobile station is performed in the sector allocation method of the first embodiment described above. However, the present invention is not limited to this. In the sector allocation method, an operation in consideration of the moving speed of the mobile station may be performed. When the base station updates the contents of the downlink / uplink sector selection bitmap (selects allocation candidate sectors) (corresponding to the systems of Embodiments 3 and 4), the mobile station is in a high-speed movement state. Information on whether or not there is (or information for determining whether or not the mobile station is in a high-speed movement state) is periodically notified to the base station (for example, every time CQI is measured).

  When the quality measuring unit 22 measures the “CQI value assuming that signals transmitted from a plurality of sectors are combined on the receiving side”, the quality comparing unit 24c selects “synthesized” The sector may be selected using the “CQI value assuming the case”. Specifically, the “CQI value assuming the combined case” is corrected to a low value because of the large use of resources (= sectors), and then compared with the “CQI value in a single sector”. The sector or combination of sectors when the CQI value is the highest is set as the selected sector. Alternatively, after obtaining the amount of data that can be transmitted with the “CQI value assuming a combined case” and correcting it low because of the use of many resources (= sectors), the “CQI value in a single sector” Comparison processing is performed with the amount of data that can be transmitted, and the sector or combination of sectors that can transmit the largest amount of data is set as the selected sector. As a result of the comparison, when it is determined that the “CQI value assuming the case of combining” is the highest and a combination of sectors that realizes this is selected, the quality comparison unit 24c assumes the “case of combining” “CQI value” is set in the channel quality feedback information and output.

  Thus, in the present embodiment, when the mobile station is moving at high speed, all selectable sectors are always used regardless of the CQI state, and on the signal receiving side, all of these sectors are used. By operating to synthesize the received signals (soft combine), one sector is selected based on unreliable CQI, and the radio quality deteriorates when data is actually transmitted, resulting in reduced throughput. It was decided to prevent. As a result, it is possible to obtain an effect that the combined gain of the signal is always obtained and the throughput is improved.

  As described above, the sector allocation method according to the present invention is useful for a wireless communication system, and in particular, realizes inter-sector diversity in which signals are transmitted and received between a base station and a mobile station using a plurality of sectors. It is suitable for a wireless communication system.

It is a figure which shows the structural example of the radio | wireless communications system which implement | achieves the sector allocation method concerning this invention. 3 is a diagram illustrating a configuration example of a mobile station configuring a wireless communication system that implements the sector allocation method according to Embodiment 1. FIG. 6 is a flowchart showing an operation example in which the quality comparison unit of the mobile station in the first embodiment updates the contents of a downlink sector selection bitmap. It is a figure which shows an example of channel quality feedback information. 3 is a diagram illustrating a configuration example of a base station configuring a wireless communication system that implements the sector allocation method according to Embodiment 1. FIG. 3 is a flowchart illustrating an operation example in which a scheduling unit of the base station according to the first embodiment allocates sectors. It is a figure which shows the outline | summary of the operation example in which a base station allocates a sector with respect to a mobile station. It is a figure which shows an example of a mode that the base station which manages a some sector allocates a sector with respect to a some mobile station. It is a figure which shows an example of a mode that the base station which manages a some sector allocates a sector with respect to a some mobile station. 10 is a flowchart illustrating an operation example in which the quality comparison unit of the mobile station according to the second embodiment generates channel quality feedback information. FIG. 10 is a diagram illustrating a configuration example of a mobile station configuring a wireless communication system that implements the sector allocation method according to the third embodiment. It is a figure which shows an example of radio | wireless line feedback information. FIG. 10 is a diagram illustrating a configuration example of a base station configuring a wireless communication system that implements the sector allocation method according to the third embodiment. FIG. 10 is a diagram illustrating a configuration example of a mobile station configuring a wireless communication system that implements the sector allocation method according to the fourth embodiment. [Fig. 20] Fig. 20 is a diagram illustrating a configuration example of a base station configuring a wireless communication system that implements the sector allocation method of the fourth embodiment. It is a figure which shows an example of a mode that the base station which manages several sectors allocates the sector for uplink data transmission with respect to several mobile stations. It is a figure which shows an example of a mode that the base station which manages several sectors allocates the sector for uplink data transmission with respect to several mobile stations. 10 is a flowchart illustrating an operation example in which a scheduling unit provided in a base station according to Embodiment 5 allocates sectors. 20 is a flowchart illustrating an operation example in which a scheduling unit provided in a base station according to Embodiment 6 allocates sectors. FIG. 10 is a diagram illustrating a configuration example of a mobile station configuring a wireless communication system that implements the sector allocation method according to the seventh embodiment. 18 is a flowchart showing an operation example in which the quality comparison unit of the mobile station according to the seventh embodiment updates the contents of the downlink sector selection bitmap.

Explanation of symbols

1, 1a, 1b Base station device 2, 2a, 2b, 2c Mobile station device 11, 11b, 21, 21b, 21c Layer 1 processing unit 12, 51 Pilot signal transmission unit 13, 13a Quality information acquisition unit 14, 14b Scheduling unit 15, 23, 26, 43 Layer 2 processing unit 16, 17, 18 Sector antenna 22, 42 Quality measurement unit 24, 24c, 31, 31b Quality comparison unit 25, 25a Quality information transmission unit 27 Antenna 41 Combining processing unit 52 Layer 2 Control unit 61 Movement speed detection unit

Claims (41)

In a radio communication system, a base station apparatus assigns at least one of a plurality of sectors managed by a base station apparatus to a specific mobile station apparatus as a downlink sector,
Based on the downlink channel quality (downlink quality) of the sector managed by the base station device, the mobile station device receives a sector candidate (downlink sector candidate) for receiving downlink data from the base station device ), And a downlink sector selection notification step of notifying the base station device of the selected downlink sector candidate;
The base station apparatus, a downlink sector assignment process of assigning to the mobile station device at least one sector from among the selected sectors as the downlink sector candidate as a downlink sector for downlink data reception,
Only including,
In the downlink sector selection notification step, channel quality (combined channel quality) obtained by executing correction processing based on the amount of resources used for channel quality after combining downlink signals received in a plurality of sectors, Compare the downlink quality of downlink signals received in each sector, and if the combined channel quality is the highest (the channel quality is the best), select multiple sectors that received the combined downlink signal as downlink sector candidates sector allocation method characterized by.   The downlink sector selection notifying step selects a sector having the best downlink quality and a sector whose difference in downlink quality is within a predetermined range as the downlink sector candidate. Item 4. The sector allocation method according to Item 1. In the downlink sector allocation step, the one or more other mobile station devices further execute the downlink sector selection notification step from one or more other mobile station devices different from the mobile station device. When receiving the notification of the selected downlink sector candidate, based on the downlink sector candidate notified from the mobile station device and each downlink sector candidate notified from the one or more other mobile station devices, respectively, The sector allocation method according to claim 1 or 2 , wherein a downlink sector is allocated to the mobile station apparatus. In the downlink sector allocation process, in the downlink sector candidate already all sectors except assigned sector to another mobile station device, one of the claims 1-3, characterized in that assigned as the downlink sector The sector allocation method as described in one. In the downlink sector selection notifying step, if the downlink quality of the sector with the best downlink quality is better than a predetermined threshold value that is a value that can ensure sufficient reception quality even in one sector, the sector The sector allocation method according to any one of claims 1 to 4 , wherein only the first sector is selected as a downlink sector candidate. further,
A moving state detecting step for detecting whether or not the mobile station device is in a high speed moving state;
Including
2. In the downlink sector selection notification step, when the mobile station apparatus is in a high-speed movement state, all selectable sectors are selected as downlink sector candidates without considering downlink quality. 6. The sector allocation method according to any one of 5 above. In a radio communication system, a base station apparatus assigns at least one of a plurality of sectors managed by a base station apparatus to a specific mobile station apparatus as a downlink sector,
A downlink quality notification step in which the mobile station device notifies the base station device of downlink quality (downlink quality) of a sector managed by the base station device in communication;
The base station apparatus, based on the downlink quality, the sector to be used in downlink data transmission to the reporting mobile station apparatus of the downlink quality candidates (downlink sector candidate) select at least one lower Ri sector candidate and the downstream sector selection allocation step of allocating to the mobile station device at least one sector from the selected sectors as a downlink sector for downlink data received as,
Only including,
A sector allocation method characterized in that, in the downlink sector selection / allocation step, all sectors other than those already allocated to other mobile station devices among the downlink sector candidates are allocated as the downlink sector . The downlink sector selection / allocation step selects, as the downlink sector candidate, a sector having the best downlink quality and a sector whose difference between the downlink quality of the sector is within a predetermined range. Item 8. The sector allocation method according to Item 7 . In the downlink sector selection / assignment step, if the downlink quality of the sector having the best downlink quality is better than a predetermined threshold value that is a value that can secure sufficient reception quality even in one sector, the sector The sector allocation method according to claim 7 or 8 , wherein only the first sector is selected as a downlink sector candidate. further,
The mobile station device detects whether or not it is in a high-speed moving state, and notifies the base station device of the detection result, a moving state detection notification step,
Including
In the downlink sector selection allocating step, the when the mobile station apparatus of the fast moving state, without regard to the downlink quality, claims 7 to, wherein the selection of all selectable sector as a downlink sector candidate 10. The sector allocation method according to any one of 9 above. The base station apparatus, when there are a plurality of downlink sectors, performs transmission with transmission power lower than transmission power used when there is one downlink sector in each downlink sector. The sector allocation method according to any one of 0 . The base station apparatus, when there are a plurality of downlink sectors, performs transmission using less radio resources in each downlink sector than radio resources used when there is one downlink sector. 1-1. The sector allocation method according to any one of 1 to 11 . The base station apparatus, when the downlink sector is one, according to claim 1 to 1 2, characterized in that to transmit at a higher transmission power than the transmission power used in each downlink sector if the downlink sector there are a plurality of The sector allocation method according to any one of the above. The base station apparatus performs transmission using more radio resources than radio resources used in each downlink sector when the number of downlink sectors is one and a plurality of downlink sectors exist. sector allocation method according to any one of 1 to 1 3. In a wireless communication system, a base station apparatus assigns at least one of a plurality of sectors managed by a base station apparatus to a specific mobile station apparatus as an uplink sector,
Based on the uplink channel quality (uplink quality) between each base station and the mobile station device in each sector , sector candidates (uplink sector candidates) for receiving uplink data from the mobile station device ) select at least one of the uplink sector selection allocation process as an uplink sector assigned to the mobile station device for at least one sector of the uplink data transmission from the sector selected as above Ri sector candidate,
When the base station apparatus allocates a plurality of uplink sectors in the uplink sector selection determination step, an uplink signal combining step of combining uplink signals received in the plurality of uplink sectors;
Only including,
In the uplink sector selection / assignment step, channel quality (combined channel quality) obtained by executing correction processing based on the amount of resources used for channel quality after combining uplink signals received in a plurality of sectors; Compare the uplink quality of the uplink signal received in each sector, and if the combined channel quality is the highest (the channel quality is the best), select multiple sectors that received the combined uplink signal as uplink sector candidates sector allocation method characterized by. The uplink sector selection / assignment step selects a sector having the best uplink quality and a sector having a difference in uplink quality within a predetermined range as the uplink sector candidate. sector allocation method according to claim 1 5. In the uplink sector selection / assignment step, when signals transmitted from one or a plurality of other mobile station devices different from the mobile station device are received by a plurality of sectors, the uplink sector candidates of the respective mobile station devices And assigning an uplink sector to each mobile station device based on the uplink sector candidate of the mobile station device and each uplink sector candidate of the one or more other mobile station devices. The sector allocation method according to claim 15 or 16 . In the uplink sector selection assigning step, all the sectors other than those already assigned for uplink signal reception from other mobile station apparatuses are assigned as the uplink sectors among the uplink sector candidates. The sector allocation method according to any one of claims 15 to 17 . In the uplink sector selection / assignment step, if the uplink quality of the sector with the best uplink quality is better than a predetermined threshold value that is a value that can ensure sufficient reception quality even in one sector, only the sector The sector allocation method according to any one of claims 15 to 18 , characterized in that is selected as an uplink sector candidate. further,
The mobile station device detects whether or not it is in a high-speed moving state, and notifies the base station device of the detection result, a moving state detection notification step,
Including
In the uplink sector selection allocating step, the when the mobile station apparatus of the fast moving state, according to claim 1 5, characterized in that without regard to the upstream channel quality, selecting all sectors that can be selected as the upstream sector candidate The sector allocation method according to any one of to 19 . The mobile station apparatus, wherein if the uplink sector there are a plurality, in the upstream sector, according to claim 1 5-6 and performs transmission at lower transmission power than the transmission power uplink sector is used when one 20. The sector assignment method according to any one of 0 . The mobile station apparatus, when there are a plurality of uplink sectors, performs transmission using less radio resources in each uplink sector than radio resources used when there is one uplink sector. The sector allocation method according to any one of 1 5 to 2 1 . The mobile station apparatus, wherein if the uplink sector is one, according to claim 1 5-2, characterized in that to transmit at a higher transmission power than the transmission power used in each uplink sector if the uplink sector there are a plurality of The sector allocation method according to any one of 2 above. The mobile station apparatus performs transmission using more radio resources than radio resources used in each uplink sector when there is one uplink sector and there are a plurality of uplink sectors. sector allocation method according to any one of 1 5-2 3. A first allocation process of assigning downlink sector by sector allocation method according to any one of claims 1 to 1 4,
A second allocation processing for allocating an uplink sector by sector allocation method according to any one of claims 1 to 5 21 to 24,
Including a sector allocation method. A base station apparatus that allocates at least one of a plurality of sectors managed by itself as a downlink sector to a specific mobile station apparatus,
Acquisition of downlink sector candidate information for acquiring sector candidates (downlink sector candidates) for receiving downlink data selected by the mobile station device based on downlink channel quality (downlink quality) of the plurality of sectors Means,
A downstream sector allocation means for allocating to the mobile station device at least one sector from among the selected sectors as the downlink sector candidate as a downlink sector for downlink data reception,
Equipped with a,
The downlink sector allocation means, already all sectors except assigned sector to another mobile station apparatus in the downlink sector candidate, base station apparatus, wherein assign as the downlink sector. A base station apparatus that allocates at least one of a plurality of sectors managed by itself as a downlink sector to a specific mobile station apparatus,
Downlink quality acquisition means for acquiring downlink channel quality (downlink quality) measured by the mobile station device;
Based on the downlink quality, downlink sector candidate selection means for selecting at least one sector candidate (downlink sector candidate) to be used for downlink data transmission to the mobile station device ;
A downstream sector allocation means for allocating to the mobile station device at least one sector as a downlink sector for downlink data received from the sector selected as the downlink sector candidates,
Equipped with a,
The downlink sector allocation means, already all sectors except assigned sector to another mobile station apparatus in the downlink sector candidate, base station apparatus, wherein assign as the downlink sector. The downlink sector candidate selecting means selects, as the downlink sector candidate, a sector having the best downlink quality and a sector whose difference in downlink quality is within a predetermined range. Item 28. The base station apparatus according to Item 27 . When the downlink sector allocating means has a downlink quality of a sector having the best downlink quality better than a predetermined threshold value that is a value that can ensure sufficient reception quality even in one sector, only the sector 29. The base station apparatus according to claim 27 or 28 , wherein: is selected as a downlink sector candidate. 30. The transmission device according to any one of claims 26 to 29 , wherein when there are a plurality of downlink sectors, transmission is performed in each downlink sector with a transmission power lower than that used when there is one downlink sector. The base station apparatus as described in. If the downlink sector there are a plurality, in each downlink sector, downstream sector claim 2 6-3 0, characterized in that performing transmission using fewer radio resources from the radio resource to be used when one The base station apparatus as described in any one. If the downlink sector is one, claim 2 6-3 1, characterized in that to transmit at a higher transmission power than the transmission power used in each downlink sector if the downlink sector there are a plurality of The base station apparatus as described in. If the downlink sector is one, downstream sector of Claim 2 6-3 2, characterized in that for transmission using a plurality of radio resources from the radio resources used in each downlink sector when there are a plurality of The base station apparatus as described in any one. A base station apparatus that allocates at least one of a plurality of sectors managed by itself as an uplink sector to a specific mobile station apparatus,
Uplink sector that selects at least one sector candidate (uplink sector candidate) for receiving uplink data from the mobile station apparatus based on uplink channel quality (uplink quality) with the mobile station apparatus Candidate selection means;
And an upstream sector allocation means for allocating to the mobile station device at least one sector among the sectors is selected as the uplink sector candidate as an upstream sector for the uplink data transmission,
Equipped with a,
The uplink sector allocation means, in the upstream sector candidate already all sectors except assigned sector to another mobile station apparatus, base station apparatus, wherein assign as the upstream sector. The uplink sector candidate selecting means selects, as the uplink sector candidate, a sector having the best uplink quality and a sector whose uplink quality difference between the sector is within a predetermined range. the base station apparatus according to claim 3 4. When the uplink sector allocating means is better than a predetermined threshold value that is a value that can ensure sufficient reception quality even with one sector, the uplink quality of the sector with the best uplink quality is only the sector. the base station apparatus according to claim 3 4 or 35, characterized by selecting as the upstream sector candidates. A base station apparatus that allocates at least one of a plurality of sectors managed by itself to a specific mobile station apparatus as a sector for data transmission,
Assign a downlink sector to the mobile station apparatus by the process according to any one of claims 2 6-3 3,
further,
The base station apparatus characterized by allocating the uplink sector to the mobile station apparatus by the process according to any one of claims 3 4 to 36. A mobile station apparatus that receives a downlink signal using a downlink sector allocated from a specific base station apparatus,
At least one sector candidate (downlink sector candidate) for receiving downlink data from the base station apparatus is selected based on downlink channel quality (downlink quality) of a plurality of sectors managed by the base station apparatus Down sector candidate selection means to perform,
A downlink sector that notifies the base station device of the downlink sector candidate and causes at least one sector to be selected as a downlink sector for downlink data transmission to the mobile station device from among the sectors selected as the downlink sector candidate Candidate notification means;
Equipped with a,
If the downlink sector candidate selection means has a downlink quality of a sector with the best downlink quality better than a predetermined threshold value that is a value that can ensure sufficient reception quality even in one sector, only the mobile station apparatus characterized that you selected as the downlink sector candidates. The downlink sector candidate selecting means selects, as the downlink sector candidate, a sector having the best downlink quality and a sector whose difference in downlink quality is within a predetermined range. Item 40. The mobile station apparatus according to Item 38 . further,
Moving state detecting means for detecting whether or not the own device is in a high-speed moving state;
With
40. The mobile station apparatus according to claim 38 or 39 , wherein when the own apparatus is in a high-speed moving state, all selectable sectors are selected as downlink sector candidates without considering downlink quality. A base station apparatus that performs the sector allocation process according to any one of claims 1 to 25 , and a mobile station apparatus that receives and allocates sectors from the base station apparatus and performs data transmission and reception ,
A wireless communication system comprising:

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