JP2004072457A - Wireless communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system which mixedly accommodates multi-carrier terminals and single carrier terminals in the radio communication system for doing packet communications by radio communications. <P>SOLUTION: A base station 20 comprises a means 27 for giving allocating information to be commonly used for a plurality of carriers in allocating the carrier to a specified radio communication terminal 10, a means 27 for allocating time slots to be used by the radio communication terminal 10, and a memory means 28 for storing the allocating information. The time slot allocating means allocates one unit of the time slot allocation to be used by the radio terminal for every frequency to one radio communication terminal 10. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a CDMA wireless communication system for performing packet communication, in which a multicarrier terminal and a single carrier terminal can coexist.
[0002]
[Prior art]
As a CDMA wireless communication system that performs packet communication by time division multiplexing (TDMA) in forward communication from a base station, for example, C.P.G.2 (http://www.3gpp2.org/), which is disclosed in C.I. The “HRPD” standard specified in S0024 is known. This is a wireless communication technology of a single carrier terminal that performs packet communication via a set of uplink and downlink frequency channels (carriers).
[0003]
On the other hand, as a technique for performing forward packet communication from a base station using code division multiplexing (CDMA), for example, C.P. S0001 to C.I. “Spread Rate 3” (SR3) of S0005-A is known. 2. This is a wireless communication technology of a multi-carrier terminal that performs packet communication using a plurality of frequency channels at the same time, and performs communication by simultaneously using three carriers (frequency channels) having a chip rate of 1.2288 MHz. It is a technology that can communicate at 6864 MHz.
[0004]
[Problems to be solved by the invention]
In the multi-carrier terminal using the above SR3, one carrier occupies one spreading code for performing CDMA, so that a spreading code is required according to the number of multi-carrier terminals in the same cell.
[0005]
On the other hand, when migrating from a conventional system using a single carrier to a multi-carrier system that is expected to spread in the future, it is expected that existing facilities can be expanded and the single carrier system and the multi-carrier system can coexist and be used simultaneously. This is very effective in terms of cost and expandability.
[0006]
Also, when performing packet communication by performing TDMA, when transferring large data such as streaming communication, if the time slots used by the wireless communication terminals are not at equal intervals, packet delay has occurred.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 provides a base station and a radio communication terminal that performs packet communication with the base station using one carrier (for example, a set of frequency channels in the uplink and downlink, referred to as a single carrier). A wireless communication terminal that performs packet communication with the base station using a plurality of carriers (for example, one or more uplinks and a downlink is a combination of two or more sets of frequency channels and is referred to as a multicarrier); And at least one of the wireless communication terminals, wherein the base station, when allocating a carrier to the specific wireless communication terminal, assigns allocation information commonly used for a plurality of carriers Assigning means, time slot allocating means for allocating a time slot used by the wireless communication terminal for communication, and allocation information recording for storing the allocation information. And means, and the time slot assigning means, for each of the carrier, said one unit of time slot allocation radio communication terminal uses to communicate and allocates a single said wireless communication terminal.
[0008]
According to a second aspect of the present invention, a first radio communication terminal that performs packet communication with the base station using one carrier and performs packet communication with the base station simultaneously using a plurality of carriers is provided. And a second wireless communication terminal, wherein the base station assigns allocation information commonly used for a plurality of carriers when assigning a carrier to the first or second wireless communication terminal. Assignment information assigning means, a time slot assigning means for assigning a time slot used by the wireless communication terminal for communication, and assignment information storage means for storing the assignment information, wherein the time slot assigning means In each case, one wireless communication terminal is allocated to one unit of time slot allocation used by the wireless communication terminal for communication.
[0009]
According to a third aspect of the present invention, in the second aspect, the time slot allocating means assigns one wireless communication terminal to one unit of time slot allocation used by the wireless communication terminal for communication for each carrier. In addition to the assignment, the first wireless communication terminal and the second wireless communication terminal are assigned independently.
[0010]
According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the time slot allocating means is configured such that one unit of the time slot allocation used by the wireless communication terminal for communication for each carrier is one unit of the wireless communication. A terminal is assigned, and the first wireless communication terminal and the second wireless communication terminal are alternately assigned.
[0011]
According to a fifth aspect of the present invention, in any one of the first to fourth aspects of the present invention, the packet communication is performed using a variable length packet.
[0012]
The invention according to claim 6 is a base station that performs packet communication with at least one of a wireless communication terminal that performs packet communication using a plurality of carriers simultaneously with a wireless communication terminal that performs packet communication using one carrier. In the station device, when simultaneously allocating a carrier to a specific wireless communication terminal, the wireless communication terminal communicates with allocation information assigning means for assigning assignment information commonly used to a plurality of carriers. Time slot allocating means for allocating a time slot to be used for the communication, and allocation information storing means for storing the allocation information, wherein the time slot allocating means uses, for each carrier, a time period used by the wireless communication terminal for communication. One wireless communication terminal is assigned to one unit of slot allocation.
[0013]
The invention according to claim 7 is a base station apparatus that performs packet communication with a first wireless communication terminal that performs packet communication using one carrier and a second wireless communication terminal that performs packet communication using a plurality of carriers. In the above, when simultaneously assigning a carrier to a specific wireless communication terminal, an assignment information assigning means for assigning assignment information commonly used to a plurality of carriers to the wireless communication terminal; Time slot allocating means for allocating time slots to be allocated, and allocation information storing means for storing the allocation information, wherein the time slot allocating means allocates, for each carrier, a time slot used by the wireless communication terminal for communication. One wireless communication terminal is assigned to one unit.
[0014]
The invention of claim 8 is characterized in that, in the invention of claim 6 or 7, the packet communication is performed using a variable length packet.
[0015]
According to a ninth aspect of the present invention, the wireless communication terminal that performs packet communication using one carrier and performs packet communication with at least one of the wireless communication terminals that performs packet communication using a plurality of carriers, When simultaneously allocating carriers to communication terminals, allocation information providing means for providing allocation information commonly used for a plurality of carriers, time slot allocating means for allocating a time slot used by the wireless communication terminal for communication, Allocation information storage means for storing allocation information, wherein the time slot allocation means includes one wireless communication terminal per unit of time slot allocation used for communication by the wireless communication terminal for each carrier. A wireless communication terminal that communicates with a base station device to which a base station is assigned, which is added to a header of a communication packet sent from the base station. By the allocation information, it determines the destination of the communication packet, and performs communication with the base station.
[0016]
The invention according to claim 10 performs packet communication with a wireless communication terminal that performs packet communication using one carrier and a wireless communication terminal that performs packet communication using a plurality of carriers at the same time. When simultaneously allocating carriers, allocation information providing means for providing allocation information commonly used for a plurality of carriers, time slot allocating means for allocating a time slot used by the wireless communication terminal for communication, and the allocation information Allocation time storage means for storing, wherein the time slot allocation means allocates one of the wireless communication terminals to one unit of time slot allocation used by the wireless communication terminal for communication for each of the carriers. A wireless communication terminal that communicates with a station device, wherein the assignment included in a header of a communication packet transmitted from the base station is provided. By broadcast, to determine the destination of the communication packet, and performs communication with the base station.
[0017]
According to an eleventh aspect, in the ninth or tenth aspect, the packet communication is performed using a variable length packet.
[0018]
Function and Effect of the Invention
According to the first and second aspects of the present invention, the wireless communication terminal includes time slot allocating means for allocating a time slot used for communication, and allocation information storing means for storing the allocation information. Since one wireless communication terminal is allocated to one unit of time slot allocation used by the wireless communication terminal for communication for each carrier, it is possible to suppress data delay of packet communication performed for each wireless communication terminal. it can.
[0019]
According to the invention of claim 3, the time slot allocating means allocates one wireless communication terminal to one unit of time slot allocation used by the wireless communication terminal for communication for each carrier, and This is characterized in that the wireless communication terminal and the second wireless communication terminal are independently assigned to each other, so that a data delay of packet communication performed to each wireless communication terminal can be suppressed.
[0020]
According to the invention of claim 4, the time slot allocating means allocates one wireless communication terminal to one unit of time slot allocation used by the wireless communication terminal for communication for each carrier, and Wireless communication terminal and the second wireless communication terminal are alternately assigned, so that the ratio of the data communication speed of packet communication performed to each wireless communication terminal becomes constant, and furthermore, data delay can be suppressed. Can be.
[0021]
According to a fifth aspect of the present invention, the packet communication is performed using a variable length packet.
[0022]
According to the invention of claims 6 and 7, when simultaneously allocating carriers to the radio communication terminal, the radio communication terminal assigns allocation information commonly used for a plurality of carriers; A time slot allocating means for allocating a time slot used by the terminal for communication, and allocation information storing means for storing the allocation information, wherein the time slot allocating means comprises Since one wireless communication terminal is allocated to one unit of time slot allocation to be used, data delay of packet communication performed for each wireless communication terminal can be suppressed.
[0023]
According to the eighth aspect of the present invention, since the packet communication is performed using the variable length packet, the communication line can be used efficiently without generating useless packets as much as possible.
[0024]
According to the ninth and tenth aspects of the present invention, when simultaneously assigning carriers to the wireless communication terminal, assignment information assigning means for assigning assignment information commonly used for a plurality of carriers, and the wireless communication terminal uses for communication. Time slot allocating means for allocating a time slot; and allocation information storing means for storing the allocation information, wherein the time slot allocating means comprises one of the time slot allocations used by the wireless communication terminal for communication for each carrier. The unit is a wireless communication terminal that communicates with a base station device that allocates one of the wireless communication terminals, and the allocation information added to the header of the communication packet sent from the base station, Since the destination is determined and communication is performed with the base station, data delay in packet communication from the base station can be suppressed.
[0025]
According to the eleventh aspect of the present invention, since the packet communication is performed using the variable length packet, the communication line can be used efficiently without generating useless packets as much as possible.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a communication system according to an embodiment of the present invention will be described in detail with reference to the drawings.
[0027]
FIG. 1 shows a schematic diagram of a communication system according to an embodiment of the present invention.
[0028]
10 is a mobile station, 20 is a base station, and 30 is an exchange.
[0029]
The mobile station 10 includes one or more mobile terminals. The mobile terminal A and the mobile terminal B are multi-carrier terminals, and use three carriers simultaneously, perform code division multiplexing for each carrier, and perform forward packet communication from the base station 20. The mobile terminal C, the mobile terminal D, the mobile terminal E, the mobile terminal F and the mobile terminal G are single carrier terminals, and perform code division multiplexing using only one carrier at the same time to perform forward packet communication from the base station 20. I do.
[0030]
The base station 20 includes antennas 21 to 23, radio units 24 to 26, a control unit 27, and a storage unit 28. The antennas 21 to 23 are connected to radio units 24 to 26, respectively, and receive radio waves from the mobile station 10 and transmit radio waves to the mobile station 10. Radio units 24 to 26 convert transmission data into high-frequency signals transmitted from antennas 21 to 23, and convert high-frequency signals received by antennas 21 to 23 into reception data. The antenna 21 and the radio unit 24, the antenna 22 and the radio unit 25, and the antenna 24 and the radio unit 26 communicate with the mobile station 10 using different carriers. That is, the base station 20 can simultaneously transmit and receive a plurality of carriers and perform multicarrier communication with the mobile station 10.
The control unit 27 controls the radio units 24 to 26, assigns a MAC index described later, stores the MAC index in the storage unit 28, and manages the mobile station 10.
[0031]
The exchange 30 connects the base station 20 to another base station or a broadband line and mediates communication.
[0032]
Next, an outline of the communication system according to the embodiment of the present invention will be described.
[0033]
In the communication system according to the present embodiment, base station 20 can transmit and receive three carriers at the same time, and mobile station 10 and base station 20 can simultaneously communicate using three carriers. Among the mobile stations 10, the single carrier terminal can communicate with the base station by using any one of the three carriers, and the multicarrier terminal can simultaneously use the three carriers. At this time, time division multiplexing (TDMA) is performed in each carrier, a time slot is set in one carrier, and data is divided for each time slot to perform communication. The size of the time slot may be a fixed length, or may be a variable length according to the amount of data and the type of data.
[0034]
Further, when communication is performed between the base station 20 and the mobile station 10, communication is performed by performing code division multiplexing (CDMA) on communication data in each time slot.
[0035]
When the mobile station 10 communicates with the base station 20, the base station 20 manages the carrier used by the mobile station and the time slot used by the “MAC index”.
[0036]
FIG. 2 illustrates this MAC index.
[0037]
The MAC index according to the present embodiment is a 6-bit code map composed of 64 types of codes (0 to 63 in decimal). This code (MAC index) is assigned to each terminal included in the mobile station 10 by the base station 20 with a carrier used by each terminal and an available time slot.
[0038]
FIG. 3 is a schematic diagram showing the assignment of carriers and time slots when the mobile station 10 and the base station 20 perform communication.
[0039]
The multicarrier terminal (wireless terminal A or B) simultaneously uses a plurality of (three in this embodiment) time slots at the same time among a plurality of (three in this embodiment) allocated carriers. Perform communication. Since single carrier terminals (wireless terminals C to G) perform communication using only one carrier, only one time slot of one carrier is used in the same time, so that three single carrier terminals are used in different carriers. At the same time, packet communication can be performed.
[0040]
Next, an operation when the base station 20 allocates a carrier and a time slot to a wireless terminal using the MAC index and performs packet communication will be described.
[0041]
First, an operation when the base station 20 allocates a carrier to the mobile station 10 (wireless terminal) will be described with reference to FIG.
[0042]
The base station 20 constantly transmits a synchronization signal to the mobile station 10 (process 401).
[0043]
When the power of the mobile station 10 is turned on and a synchronization signal is received from the base station (process 402), the mobile station 10 performs a registration operation process shown in the following processes 404 to 413 on the base station 20 (process 403).
[0044]
This registration operation requires that the mobile station 10 be registered in the control unit 27 of the base station 20 in order to communicate with the base station 20. The mobile station 10 transmits a registration operation start request message for this registration to the base station 20 and requests registration with the base station 20 (process 404). Upon receiving this request message, the base station 20 recognizes the presence of the mobile station 10. At the same time, a registration operation start permission message for confirming the start of the registration operation is returned to the mobile station 10 (process 405).
[0045]
When the mobile station 10 receives the permission message, the mobile station 10 transmits function information indicating whether the mobile station 10 (wireless terminal) is a single-carrier terminal or a multi-carrier terminal to the base station 20 and adapts to the function of the wireless terminal. Request carrier assignment (process 406). The base station 20 receives the function information, recognizes that the mobile station 10 is a single carrier terminal or a multi-carrier terminal, and stores the function information of the mobile station 10 in the storage unit 28. When the function information is stored, the base station 20 returns a function information reception message for confirming that the function information has been received to the mobile station 10 (process 407).
[0046]
Next, the base station 20 allocates one or more (two or all three) of the carriers 1 to 3 to be used for communication with the mobile station 10 (process 408). Details of this processing will be described later with reference to FIG.
[0047]
When a carrier is allocated to the mobile station 10 in the base station 20, the allocated carrier information is transmitted to the mobile station 10 as a carrier allocation message (process 409). Upon receiving the carrier assignment message, mobile station 10 returns a carrier assignment acknowledgment message indicating that the carrier information has been received (process 410). The mobile station 10 changes the carrier setting of a radio unit (not shown) provided in the mobile station 10 so as to communicate with the base station 20 using the allocated carrier (process 411). When the carrier setting is completed in the mobile station 10, a carrier change completion message is transmitted to the base station 20 (process 412). Upon receiving the carrier change completion message, the base station 20 recognizes that communication with the carrier allocated to the mobile station 10 has become possible, and returns a carrier change completion confirmation message (process 413).
[0048]
As described above, the carrier for packet communication between the mobile station 10 and the base station 20 is determined, and thereafter, the base station 20 and the mobile station 10 can communicate with each other using the determined carrier.
[0049]
FIG. 5 is a flowchart showing the carrier assignment process, which is executed in the base station 20 as the process 408 in FIG.
[0050]
First, referring to the function information of the mobile station 10 received in the process 406 of FIG. 4 (process 501), it is determined whether the mobile station 10 is a single carrier terminal or a multi-carrier terminal (process 502). If it is a multi-carrier, the process moves to step 503. If the mobile station 10 is a single carrier, the process proceeds to step 504.
[0051]
In the process 503, the mobile station 10 that is a multicarrier terminal is assigned to use all three carriers.
[0052]
In the process 504, the number and traffic information of the mobile stations 10 assigned to the carrier 1 and the number and traffic information of the mobile stations 10 assigned to the carrier 3 are referred to.
[0053]
Since the base station 20 always knows which mobile station is allocated to which carrier, it is easy to know how many mobile stations are allocated to each carrier. In addition, the time slots in each carrier are statistically calculated, the empty slot ratio and the used slot ratio are grasped, and the traffic of each carrier can be grasped.
[0054]
Next, the congestion state is determined from the number of mobile stations allocated to carrier 1 and carrier 3 and traffic. (Process 505). If carrier 1 is not congested with carrier 3, carrier 1 is allocated to the mobile station (process 506). If carrier 3 is not congested with carrier 1, carrier 3 is allocated to the mobile station (process 507). If it is determined that both carrier 1 and carrier 3 are in a congested state, carrier 2 is allocated to the mobile station (process 508).
[0055]
Next, an operation when the base station 20 assigns a MAC index to the mobile station 10 will be described with reference to FIG.
[0056]
First, when a carrier is determined according to the sequence of FIG. 4 and a carrier for packet communication is set, the mobile station 10 transmits a communication channel assignment request message requesting assignment of a communication channel to the base station 20 ( Process 601). Upon receiving the communication channel assignment request message, the base station 20 returns a communication channel assignment request response message for confirming the reception of the request message to the mobile station 10 (process 602), and information necessary for assigning the MAC index (hereinafter, referred to as “MAC index”). , “Mobile station information”), and transmits a MAC index allocation mobile station information request message to request information on whether the mobile station is a multicarrier terminal or a single carrier terminal, and the communication quality state of the mobile station. Request information or the like (process 603).
[0057]
When the mobile station 10 receives this information request message, the base station 20 transmits a MAC index assignment mobile station information request response message including information on the type of the mobile station terminal and information on the communication quality state of the mobile station as mobile station information. (Step 604). When the mobile station information is received by the base station 20, an information reception response message for confirming the reception is transmitted (process 605).
[0058]
The base station 20 assigns a MAC index to the mobile station 10 based on the mobile station information. This allocation process will be described later with reference to FIG.
[0059]
When the MAC index is assigned, the base station 20 transmits this MAC index to the mobile station 10 by transmitting a MAC index assignment message to notify the MAC index (process 607). Upon receiving the MAC index assignment message, the mobile station 10 returns an information reception response message to the effect that the reception has been confirmed to the base station 20 (process 608), and the storage unit having the assigned MAC index in the mobile station ( (Not shown), and set to a communicable state so that packets with the MAC index can be transmitted and received (process 609).
[0060]
This allows the base station 20 and the mobile station 10 to perform data communication using the MAC index (process 610).
[0061]
FIG. 7 is a flowchart showing the operation of this MAC index assignment.
[0062]
First, the mobile station 10 that performs communication recognizes and acquires whether it is a single carrier or a multi-carrier based on the information received in the process 406 of FIG. 4 (process 701), and moves to the mobile station 10 set by the process 408 of FIG. The carrier of the station 10 is recognized and acquired (process 702).
[0063]
Based on the above information, when the mobile station 10 is a multi-carrier, the process proceeds to a process 704, and when the mobile station 10 is a single carrier, the process proceeds to a process 710 (process 703).
[0064]
In step 704, it is determined whether there is a vacancy in the MAC index that can be assigned to the multicarrier terminal. If there is a vacancy in the MAC index for the multicarrier terminal, the process proceeds to step 705, where the MAC index is assigned to the mobile station 10, and the carrier used by the mobile station 10 is stored in association with the MAC index.
[0065]
The mobile station 10 and the carrier used by the mobile station 10 are allocated and stored in the code map of the MAC index. The code map according to the embodiment of the present invention uses a 6-bit code map composed of 64 types of elements 0 to 63 (see FIG. 2). At this time, single carriers are allocated in the forward direction and multicarriers are allocated in the reverse direction (for example, single carrier terminals are allocated in the order of 0, 1, 2, 3, 4,..., And multicarriers are allocated in 63, 62, 61,. ··· Assign in order). By doing so, the assignment of the carrier and the time slot of each mobile station becomes unique, and the time slot and the carrier can be effectively used to the maximum.
[0066]
If it is determined in step 704 that there is no free space in the MAC index, the process proceeds to step 706 to determine whether there is a free space in the MAC index for the single carrier terminal. If there is no space in the MAC index for the single carrier terminal, it is determined that the upper limit of the number of communicable mobile stations in the cell of the base station 20 has been reached, and a message indicating that the mobile station is congested. Is transmitted (process 707), and the process ends.
[0067]
On the other hand, if there is a vacancy in the MAC index for the single carrier terminal, the vacant area of the MAC index for the single carrier terminal is allocated to the area of the MAC index for the multicarrier terminal (processing 708), and the MAC index of the added vacant area is assigned. Is assigned to the mobile station (multi-carrier terminal) (process 709).
[0068]
In the present embodiment, the boundaries of the respective areas of the MAC index used by the single carrier and the MAC index used by the multicarrier are set in advance, but as described above, one of the single carrier and the multicarrier is used. In the case where is already congested and the space is exhausted, the boundary of the area can be moved to increase the area where the congestion is higher.
[0069]
Alternatively, the boundary between the single carrier and the multicarrier may be fixed, and the ratio at which the mobile station of the single carrier and the multicarrier communicating in the same cell can communicate with each other may be fixedly set in advance.
[0070]
Alternatively, different code maps may be prepared for a single carrier terminal and for a multicarrier terminal, and may be individually allocated. In this case, it is not affected by the congestion state of the other type of terminal.
[0071]
If it is determined in step 703 that the terminal is a single carrier terminal, the same processing as the above steps 704 to 709 is performed, a message indicating that the terminal is congested and waiting for free is transmitted, and the processing is terminated or the MAC index is changed. Assign (processing 710 to 715).
[0072]
As described above, the MAC index is assigned to the mobile station 10 from the base station 20.
[0073]
Next, a procedure for performing packet communication between the base station 20 and the mobile station 10 based on the assigned MAC index will be described.
[0074]
When there is a data transmission request from the mobile station 10, the base station 20 first obtains the mobile station 10 and the carrier allocated to the mobile station 10 by referring to the MAC index, and obtains one for each MAC index. One time interval is assigned to a frame, and packets are transmitted in the assigned order.
[0075]
In the mobile radio communication system according to the present embodiment, when the base station 20 allocates each terminal included in the mobile station 10 to a frame, one time slot is set to one frame as shown in FIG. And frames to be assigned to multicarrier terminals are alternately assigned at equal intervals.
[0076]
When the frame allocation is determined, the base station 20 sequentially transmits the packets to which the header including the MAC index is added (FIG. 8).
[0077]
The mobile station 10 refers to the header, recognizes a packet length, a time unit length, and the like, and receives the packet. When the time unit ends, the system prepares to receive the next packet.
[0078]
In the communication system according to the embodiment of the present invention configured as described above, when the base station 20 performs downlink packet communication with the mobile station 10, the carrier used by the multicarrier terminal and the single carrier terminal is used. Since the base station and the time slot are centrally managed by the MAC index, the multi-carrier terminal and the single-carrier terminal can coexist in the same communication system.
[0079]
Further, since single-carrier terminals and multi-carrier terminals are alternately allocated at equal intervals, even when large data is transferred, such as in streaming communication, occurrence of data delay can be suppressed.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a communication system according to a first embodiment of the present invention.
FIG. 2 is a schematic diagram of a MAC index.
FIG. 3 is a schematic diagram showing assignment of carriers and mobile stations.
FIG. 4 is a sequence diagram showing an operation of allocating carriers between a mobile station and a base station.
FIG. 5 is a flowchart when a base station allocates a carrier to a mobile station.
FIG. 6 is a sequence diagram showing an operation of assigning a MAC index between a mobile station and a base station.
FIG. 7 is a flowchart when a base station assigns a MAC index to a mobile station.
FIG. 8 is a schematic diagram of frame allocation to be allocated to each mobile terminal.
FIG. 9 is a schematic diagram of a packet used for communication performed by a mobile station and a base station.
[Explanation of symbols]
Reference Signs List 10 mobile station 20 base station 21 to 23 antenna 24 to 26 radio unit 27 management unit 28 storage unit 30 exchange

Claims (11)

At least one of a base station and a radio communication terminal that performs packet communication with the base station using one carrier and at least one of a radio communication terminal that performs packet communication with the base station using a plurality of carriers. And a communication system comprising:
The base station, when allocating a carrier to the specific wireless communication terminal, allocation information providing means for providing allocation information commonly used for a plurality of carriers,
Time slot allocating means for allocating a time slot used by the wireless communication terminal for communication,
Allocation information storage means for storing the allocation information,
The wireless communication system, wherein the time slot allocating unit allocates one wireless communication terminal to one unit of a time time slot allocation used for communication by the wireless communication terminal for each carrier. A base station, a first wireless communication terminal that performs packet communication with the base station using one carrier, and a second wireless communication terminal that performs packet communication with the base station using a plurality of carriers simultaneously. In a communication system comprising
The base station, when allocating a carrier to the first or second wireless communication terminal, allocation information providing means for providing allocation information commonly used for a plurality of carriers,
Time slot allocating means for allocating a time slot used by the wireless communication terminal for communication,
Allocation information storage means for storing the allocation information,
The wireless communication system, wherein the time slot allocating means allocates one wireless communication terminal to one unit of time slot allocation used for communication by the wireless communication terminal for each carrier. The time slot allocating means allocates one radio communication terminal to one unit of time slot allocation used by the radio communication terminal for communication for each carrier, and the first radio communication terminal and the second radio communication terminal The wireless communication system according to claim 2, wherein each of the wireless communication terminals is assigned independently. The time slot allocating means allocates one radio communication terminal to one unit of time slot allocation used by the radio communication terminal for communication for each carrier, and the first radio communication terminal and the second radio communication terminal The wireless communication system according to claim 2, wherein the wireless communication terminals are alternately assigned. The wireless communication system according to any one of claims 1 to 4, wherein the packet communication is performed using a variable length packet. In a base station apparatus that performs packet communication with at least one of the wireless communication terminals that perform packet communication using a plurality of carriers simultaneously with the wireless communication terminal that performs packet communication using one carrier and performs packet communication with the wireless communication terminal,
When simultaneously allocating a carrier to the specific wireless communication terminal, the wireless communication terminal, the allocation information providing means for providing allocation information commonly used for a plurality of carriers,
Time slot allocating means for allocating a time slot used by the wireless communication terminal for communication,
Allocation information storage means for storing the allocation information,
The base station apparatus, wherein the time slot allocating means allocates one wireless communication terminal to one unit of time slot allocation used for communication by the wireless communication terminal for each carrier. A first wireless communication terminal that performs packet communication using one carrier and a base station device that performs packet communication with a second wireless communication terminal that performs packet communication using a plurality of carriers simultaneously,
When simultaneously allocating a carrier to the specific wireless communication terminal, the wireless communication terminal, the allocation information providing means for providing allocation information commonly used for a plurality of carriers,
Time slot allocating means for allocating a time slot used by the wireless communication terminal for communication,
Allocation information storage means for storing the allocation information,
The base station apparatus, wherein the time slot allocating means allocates one wireless communication terminal to one unit of time slot allocation used for communication by the wireless communication terminal for each carrier. 8. The base station apparatus according to claim 6, wherein the packet communication is performed using a variable length packet. Perform packet communication with at least one of the wireless communication terminals performing packet communication using a plurality of carriers simultaneously with the wireless communication terminal performing packet communication using one carrier,
Assignment information assigning means for assigning assignment information commonly used for a plurality of carriers when simultaneously assigning carriers to the specific wireless communication terminal; and time slot assignment for assigning a time slot used by the wireless communication terminal for communication. Means, and allocation information storage means for storing the allocation information, wherein the time slot allocating means is one unit for each unit of the time slot allocation used by the wireless communication terminal for communication for each of the carriers. A wireless communication terminal that communicates with a base station device that assigns the wireless communication terminal,
A wireless communication terminal, wherein a destination of the communication packet is determined based on the assignment information included in a header of the communication packet sent from the base station, and communication is performed with the base station. Perform packet communication with a wireless communication terminal that performs packet communication using one carrier and a wireless communication terminal that performs packet communication using a plurality of carriers simultaneously,
Assignment information assigning means for assigning assignment information commonly used for a plurality of carriers when simultaneously assigning carriers to the specific wireless communication terminal; and time slot assignment for assigning a time slot used by the wireless communication terminal for communication. Means, and allocation information storage means for storing the allocation information, wherein the time slot allocating means is one unit for each unit of the time slot allocation used by the wireless communication terminal for communication for each of the carriers. A wireless communication terminal that communicates with a base station device that assigns the wireless communication terminal,
A wireless communication terminal, wherein a destination of the communication packet is determined based on the assignment information included in a header of the communication packet sent from the base station, and communication is performed with the base station. The wireless communication terminal according to claim 9, wherein the packet communication is performed using a variable length packet.

Images