KR20100108169A - Method for transmitting signal using the real-time scheduling service - Google Patents

Abstract

PURPOSE: A method for transmitting a signal using a real time scheduling service is provided to efficiently use a downlink resource, thereby reducing overhead of resources. CONSTITUTION: A terminal transmits a signal using a real time scheduling service. Uplink scheduling information for an individual terminal or a grouped terminal is received from a base station. A bandwidth request message is transmitted to the base station at least once based on the uplink scheduling information. The uplink scheduling information comprises a time point when the terminal transmits a bandwidth request message.

Description

Method for transmitting signal using real-time scheduling service {METHOD FOR TRANSMITTING SIGNAL USING THE REAL-TIME SCHEDULING SERVICE}

The present invention relates to a method for transmitting a signal using a real-time scheduling service.

The scheduling service and bandwidth request method used in the conventional broadband wireless access system will be described. First, the bandwidth allocation and request method will be briefly described.

The bandwidth request is a method used by the terminals to inform the base station that the terminals need uplink bandwidth allocation. In a general broadband wireless access system, there are two methods of requesting bandwidth, a basic request method and a random access request method.

The basic request scheme is for the UE to request uplink bandwidth allocation in unicast by polling of the base station. In addition, the UE may request an uplink bandwidth by piggybacking the remaining area of the bandwidth already allocated from the base station.

The random access request method is a contention base (contention base) in which a plurality of terminals competitively transmit a bandwidth request message through one uplink channel and receive an uplink bandwidth.

The scheduling service is a service for efficiently performing an uplink bandwidth request and resource allocation accordingly. In addition, the scheduling service refers to a data processing method supported by a media access control (MAC) scheduler in case of data transmission through a connection. The connection of the terminal and the base station is associated with one scheduling service. The scheduling service may be defined by a series of Quality of Service (QoS) parameters that perform a service operation. Scheduling services include outbound transmission scheduling and uplink request / grant scheduling.

Outgoing transmission scheduling means selecting a specific frame or allocating bandwidth to transmit data. The outgoing transmission scheduling may be performed at the base station (eg, downlink) or the terminal (eg, uplink).

The uplink request / license scheduling is performed by the base station to provide a bandwidth for uplink transmission to the terminal or to provide the terminal with an opportunity to request the bandwidth. Specifying the scheduling type and associated QoS parameters, the base station scheduler can estimate the throughput of the uplink traffic and the required latency, and can provide polls or grants as appropriate.

As an uplink request / grant scheduling type, an unsolicited grant service (UGS), a real time polling service (rtPS), a non-real time polling service (nrtPS), and a best effort (BE) ) There is a service type. Let's take a closer look at real-time polling service.

A real-time polling service (rtPS) is an uplink scheduling type of a terminal for requesting in real time a service for periodically generating data packets of variable size, such as a Moving Pictures Experts Group (MPEG) video. The real-time polling service may periodically provide real-time unicast request opportunities to the terminal.

In addition, it satisfies the real-time requirements of the service flow, and based on this, it is allowed to specify the size of the desired resource in the terminal. In this case, the terminal may use only a given request opportunity and cannot make a request through competition. In the present specification, a real time polling service (rtPS) will be described as an example of an uplink request / license scheduling service. However, other scheduling services may be used, which may be applied differently according to system requirements.

1 is a diagram illustrating an example of a unicast polling method that is generally used. The real-time polling service (rtPS) used in FIG. 1 is an uplink scheduling type of a terminal for requesting data of a variable size periodically such as MPEG video in real time.

Referring to FIG. 1, the base station Serving ABS # 1 transmits unicast polling through downlink to a terminal AMS # 1 supporting a real time polling service (rtPS) (S110). That is, the base station may allocate uplink resources for the bandwidth request message (or bandwidth request header) to be transmitted by the terminal using A-MAP (Advanced MAP) or UL-MAP. In this case, A-MAP or UL-MAP may be periodically allocated, and the period may use a value set in the process of generating a service flow (DSA).

The terminal requests the base station for a bandwidth corresponding to the size of the data packet to be transmitted to the base station through the allocated uplink resources (S120). In this case, the terminal may use a bandwidth request header or a bandwidth request message to request the bandwidth.

The base station receives a bandwidth request for transmitting an uplink data packet from the terminal, and if the bandwidth requested by the terminal is assignable, allocates a corresponding uplink resource to the terminal and transmits an UL grant to the terminal (S130). ). A terminal allocated a bandwidth for the uplink region from the base station may transmit uplink data to the base station through the allocated transmission region (S140). That is, generally, a terminal receiving a real time polling service (rtPS) may request and be allocated an uplink resource according to the procedure shown in FIG. 1.

2 is a diagram illustrating an uplink allocation process for supporting a real time polling service to two terminals.

Referring to FIG. 2, the base station ABS # 1 Serving transmits A-MAP IE (Advanced-MAP Information Element) of each of UE 1 (AMS # 1) and UE 2 (AMS # 2) in downlink (S210). ). Each A-MAP IE designates an uplink region for transmitting data information to be transmitted by the terminal when the terminal has data to transmit to the base station. If there is data to be transmitted to the base station, the terminal transmits a bandwidth request header to the area allocated in the A-MAP IE (S220).

If there is no data to be transmitted to the base station, the bandwidth request header BR (Buffer size) region is set to 0 and the procedure ends. Here, BR means the size of data to be transmitted by the terminal. If there is data to be transmitted, the base station transmits, for example, an uplink grant (UL grant) to the terminal 1 and the terminal 2 allowing the transmission of data in the N + 1th frame (S230). Thereafter, the terminal 1 and the terminal 2 transmits data to the base station using the N + 1 th frame (S240). S210 to S240 are repeatedly performed at the polling interval specified in the DSA process.

In the conventional uplink allocation process for supporting the real-time polling service, the terminal supported by the real-time polling service must periodically allocate an uplink resource corresponding to the bandwidth request header to know whether there is data to be transmitted to the base station. As the real-time polling service terminal increases, uplink resources should be allocated during the period for the bandwidth request header of the corresponding terminal. In addition, it is necessary to periodically allocate the downlink for the A-MAP IE for uplink resource allocation of each terminal, which has a problem that the resource is not used efficiently.

An object of the present invention is to provide a method for a terminal to transmit a signal using a real-time scheduling service.

The technical problems to be solved by the present invention are not limited to the technical problems and other technical problems which are not mentioned can be understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a method for transmitting a signal using a real-time scheduling service by a terminal according to the present invention, the method comprising: receiving uplink scheduling information for an individual terminal or a grouped terminal from a base station; And transmitting the bandwidth request message to the base station at least once based on the uplink scheduling information, wherein the uplink scheduling information is a point in time when the terminal transmits a bandwidth request message and the bandwidth request message is transmitted. Period, uplink duration allocated for a specific scheduling service of the terminal, and uplink resource allocation information for the uplink scheduling service.

The method may further include receiving the changed uplink scheduling information from the base station when any one of the uplink scheduling information is changed.

The terminal may further include transmitting the bandwidth request message to a base station at a timing corresponding to the time point at which the received bandwidth request message is transmitted.

The method may further include receiving, from the base station, information about an uplink resource allocation region to which the terminal transmits data.

In this case, the bandwidth request message may include at least one of a flow ID of the terminal, priority and bandwidth size information between the terminals.

The method may further include transmitting data to the base station using the uplink resource allocation region for the received data transmission.

The terminal further includes transmitting the bandwidth request message at a new transmission timing based on the transmission period of the received bandwidth request message.

The method may further include receiving the uplink scheduling information from the base station when the received validity period has elapsed.

In addition, the uplink resource allocation information preferably includes the number of allocated OFDMA symbols, the number of subchannels, the allocated OFDMA symbol offset and subchannel offset information.

The uplink scheduling information on the grouped terminals may include a terminal identifier, the number of grouped terminals, information on whether the bandwidth request message of the grouped terminals is the same, and whether the uplink validity period is the same. Preferably, the method further includes at least one of reporting mode information indicating overall information for request size and bandwidth request and length information of the bandwidth request message.

In order to achieve the above technical problem, a method for transmitting a signal to provide a real-time scheduling service, the method comprising: transmitting uplink scheduling information for an individual terminal or a grouped terminal; And receiving the bandwidth request message one or more times based on the uplink scheduling information from the terminal, wherein the uplink scheduling information is a point in time when the terminal transmits a bandwidth request message and the bandwidth request message is transmitted. Period, uplink duration allocated for a specific scheduling service of the terminal, and uplink resource allocation information for the uplink scheduling service.

The method may further include transmitting information about an uplink resource allocation region of data to be transmitted by the terminal with respect to the bandwidth request received from the terminal.

The base station further includes transmitting the changed uplink scheduling information to the terminal when any one of the uplink scheduling information is changed.

The method may further include allocating an uplink resource region corresponding to the bandwidth request of the terminal.

According to the present invention, when allocating uplink resources of individual or grouped UEs supported with the real-time polling service, downlink resources can be efficiently used. As a result, resource overhead can be reduced.

Effects obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description set forth below in conjunction with the appended drawings is intended to explain exemplary embodiments of the present invention and is not intended to represent the only embodiments in which the present invention may be practiced. The following detailed description includes specific details to assist in a thorough understanding of the present invention. However, those skilled in the art will appreciate that the invention may be practiced without these specific details. For example, the following description will focus on certain terms, but need not be limited to these terms and may refer to the same meaning even when referred to as any term. In addition, the same or similar components throughout the present specification will be described using the same reference numerals.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

The technique disclosed below may be used in various communication systems, which may provide various communication services such as voice, packet data, and the like. The technology of the communication system can be used for downlink or uplink. A base station may be replaced by terms such as a fixed station, a base station, a Node B, an eNode B (eNB), an access point, an ABS, and the like. In addition, a mobile station (MS) may be replaced with terms such as a user equipment (UE), a subscriber station (SS), a mobile subscriber station (MSS), an AMS, or a mobile terminal.

In addition, the transmitting end refers to a node transmitting data or voice service, and the receiving end refers to a node receiving data or voice service. Therefore, in uplink, a terminal may be a transmitting end and a base station may be a receiving end. Similarly, in downlink, a terminal may be a receiving end and a base station may be a transmitting end.

On the other hand, the terminal of the present invention PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, WCDMA (Wideband CDMA) phone, MBS (Mobile Broadband System) phone This can be used.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of the Institute of Electrical and Electronics Engineers (IEEE) 802 system, the 3GPP system, the 3GPP LTE system, and the 3GPP2 system, which are wireless access systems. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document. In particular, embodiments of the present invention may be supported by documents such as standard documents of the IEEE 802.16 system, P802.16-2004, P802.16e-2005, and P802.16Rev2.

Specific terms used in the following description are provided to help the understanding of the present invention, and the use of such specific terms may be changed to other forms without departing from the technical spirit of the present invention.

Polling refers to a type of multiple access control (MAC) method in which devices sharing a communication line check sequentially or periodically to check whether there is data to be transmitted. In particular, the polling method in wireless communication refers to an access control method in which a base station sequentially checks whether a transmission request is made to a terminal and allows transmission to a terminal having a request.

As such, polling is a procedure for the base station to specifically allocate uplink bandwidth to the terminals. The bandwidth allocation method may be performed in the form of a series of information elements (IEs) included in the polling MAP (A-MAP or UL-MAP), not in the form of a message. In general, polling may be performed on a terminal basis. The bandwidth is always required in units of a connection identifier (CID) and is allocated in units of terminals.

Embodiments of the present invention are directed to a method for allocating a resource region for a bandwidth allocation request of one or more terminals supported by a real-time service. In the embodiments of the present invention, the case of uplink is described as an example, but may be applied to downlink according to a system requirement and a communication environment.

Grouping used in embodiments of the present invention refers to grouping one or more terminals included in the same information (for example, a frame or a PDU). In addition, it may mean that the resource region of the one or more terminals is configured as a group.

In the embodiments of the present invention, a real time polling service (rtPS) is described as an example among various scheduling services. However, embodiments of the present invention can also be applied to other scheduling services according to user requirements or communication environments.

The uplink scheduling type of the terminal supporting the real-time polling service may be classified into a message based method and a method based on a fixed dedicated channel.

In this specification, when allocating an uplink region for a bandwidth allocation request of a mobile terminal supported with a real-time polling service, a method for efficiently using downlink resources is defined.

For uplink scheduling of a terminal supporting the real-time polling service, the base station may allocate an uplink resource for a bandwidth request header (or bandwidth request message) to be transmitted by the terminal. The allocated uplink information may be transmitted to the terminal through A-MAP or UL-A-MAP. In this case, A-MAP or UL-A-MAP may be referred to as a polling A-MAP IE. The polling A-MAP IE may include information such as a time point at which the UE transmits a bandwidth request message, a polling start time, a period, an expiration date, and an uplink resource allocation area.

In this case, the time point at which the terminal transmits the bandwidth request message may mean, for example, a start frame number. The polling start time point may mean, for example, a start offset. In addition, a period may mean, for example, a polling period, and a polling period is a period in which the terminal may transmit a bandwidth request message. The duration may mean, for example, a period in which the uplink allocated by the base station for polling of the terminal is valid. Polling is valid during the validity period, and the base station may not transmit the information element (IE) to the terminal whenever an uplink region is allocated. That is, the base station may not transmit the polling period polling A-MAP IE during the validity period. However, the base station may transmit a polling A-MAP IE including the changed information to the terminal when the uplink resource allocation is released during the effective period or when parameters such as an allocation area and a period are changed.

The base station may indicate the uplink resource allocation region of the terminal included in the polling A-MAP IE in the following manner.

First, an uplink resource allocation region of a UE may be represented by an OFDMA symbol offset, a subchannel offset, a number of OFDMA symbols, and a number of subchannels. Can be. It may also be reconfigured and designated in units of a logical resource unit (LRU) or a distributed resource unit (DRU).

In addition, the uplink resource allocation region may be designated as a fixed channel. For example, it may be designated as a fixed channel for UL polling channel or bandwidth request BR. However, it is not limited to a specific channel. It is designated by indexing number or allocation offset of this fixed channel.

3 is a diagram schematically showing an uplink allocation procedure for supporting a real-time polling service.

Referring to FIG. 3, the base station may allocate uplink resources corresponding to a bandwidth request header (or bandwidth request message) to be transmitted to the terminal. The allocated uplink information may be transmitted to the terminal through A-MAP or UL-A-MAP (S310). In this case, A-MAP or UL-A-MAP may be referred to as a polling A-MAP IE. The polling A-MAP IE may include information such as a time point at which the UE transmits a bandwidth request message, a polling start time, a period, an expiration date, and an uplink resource allocation area.

In this case, the time point at which the terminal transmits the bandwidth request message may mean, for example, a start frame number. The polling start time point may mean, for example, a start offset. In addition, a period may mean, for example, a polling period, and a polling period is a period in which the terminal may transmit a bandwidth request message.

The duration may mean, for example, a period in which the uplink allocated by the base station for polling of the terminal is valid. Polling is valid during the validity period, and the base station may not transmit the IE to the terminal whenever an uplink region is allocated. That is, the base station may not transmit the polling period polling A-MAP IE during the validity period. However, the base station may transmit a polling A-MAP IE including the changed information to the terminal when the uplink resource allocation is released during the effective period or when parameters such as an allocation area and a period are changed.

Thereafter, the terminal may transmit a bandwidth request header or a bandwidth request message to an uplink region allocated to the Nth frame at that time (S320). The bandwidth request message may include information such as a flow ID, a priority, and a bandwidth size for the UE to transmit a data packet.

Thereafter, the base station receives a bandwidth request for transmitting an uplink data packet from the terminal, and if the bandwidth requested by the terminal is allocated, the base station allocates the corresponding uplink resource to the N + 1th frame to grant an UL grant. Send to the terminal (S330). Thereafter, the terminal allocated the bandwidth for the uplink region from the base station may transmit data to the base station through the N + 1 th frame, which is the allocated transmission region (S340). S310 to S340 may be one cycle in the real-time polling service.

The terminal may transmit the bandwidth request header back to the base station according to the period and the validity period information received in step S310 (S350). Subsequently, the terminal receiving the bandwidth request header for transmitting an uplink data packet from the terminal, if the requested bandwidth is allocable, allocates the corresponding UL resource to the N + 5th frame to grant the UL grant. Transfer to (S360).

Thereafter, the terminal allocated the bandwidth for the uplink region from the base station may transmit data to the base station through the N + 5th frame, which is the allocated transmission region (S370). S350 to S370 may also be one period in the real time polling service.

In this case, if two periods are set to one valid time, after this valid time passes, the base station may allocate an uplink resource corresponding to the bandwidth request header (or bandwidth request message) to be transmitted to the terminal. The allocated uplink information may be transmitted to the terminal through A-MAP or UL-A-MAP. Through this process, the problem of periodically allocating an uplink resource corresponding to the bandwidth request header can be solved. In addition, it is possible to solve the problem of inefficient use of resources to periodically allocate the downlink for the A-MAP IE for uplink resource allocation of each terminal.

Table 1 and Table 2 below show an embodiment of the A-MAP IE when the base station transmits feedback_polling_IE (or polling A-MAP IE: not limited to a specific IE) for each terminal.

Syntax Size (bits) Description (Descripition / Notes) A-MAP IE 4 Feedback_polling_IE MCS 2 MCS level for sending feedback header Resource allocation 7 Uplink Resource Allocation Allocation Relevance 3 Define the allocation associations. Offset from the first uplink subframe when the first uplink feedback header is transmitted on the allocated uplink resource after the downlink subframe including the IE. The starting value of the subframe offset is 1. Allocation durartion (d) 3 The assignment is valid for 4 ^(d-1) starting from the frame defined by the assignment relevance. If d is 0b000, the prescheduled feedback header (or BR header) transmission is released. If d is 0b111, the prescheduled feedback header transmission is valid until the base station commands it to release it. Cycle (p) 2 For example, a feedback header (or BR header) is transmitted every 2 ^p superframes. DRLU 5 The downlink LRU indicates the type of RU and the number of RUs that perform feedback.
0b00000 ~ 0b10111: For DLRU = n, nth Subband CRU
0b11000: Whole bandwidth
0b11001: Frequency partition 0
0b11010: Power boosted reuse N frequency partition
0b11011: Whole subband CRUs
0b11100: DRU / mini-band CRU
0b11101: Multi-carrier
0b11110 ~ 0b11111: Reserved
Feedback type 4 See also table xxx. N 3 A DLRU of 0b11110 indicates a multicarrier for feedback, otherwise it indicates how many PMIs and CQIs should be reported for neighbor cells. Padding Variable padding to reach byte boundary MCRC 16, up to 48 Station IDFH Masked 16-Bit CRC

Feedback type Feedback content Explanation Undecided (TBD) N × (PMI (6 bit) + CQI difference (2 bit) + Temp_BSID) Interference coordination type (ICT) = 0b01
Temp_BSID, downlink PMI recommendation feedback for neighbor cell ID, the weakest interfering PMI and CQI difference, and Temp_BSID are mentioned in 15.3.11.1.1.1. Temp_BSID is a diversity set member ID assigned to this BS. Undecided (TBD) N × (PMI (6 bit) + CQI difference (2 bit) + Temp_BSID) Interference coordination type (ICT) = 0b01
Temp_BSID, downlink PMI recommendation feedback for neighbor cell ID, the weakest interfering PMI and CQI difference, and Temp_BSID are mentioned in 15.3.11.1.1.1. Temp_BSID is a diversity set member ID assigned to this BS. Undecided (TBD) N × (PMI (6 bit) + CQI difference (2 bit) + Temp_BSID) Interference coordination type (ICT) = 0b10
Temp_BSID, downlink PMI recommendation feedback for neighbor cell ID, the weakest interfering PMI and CQI difference, and Temp_BSID are mentioned in 15.3.11.1.1.1. Temp_BSID is a diversity set member ID assigned to this BS. Undecided (TBD) N × (PMI (6 bit) + CQI difference (2 bit) + Temp_BSID) Interference coordination type (ICT) = 0b11
Temp_BSID, downlink PMI recommendation feedback for neighbor cell ID, the weakest interfering PMI and CQI difference, and Temp_BSID are mentioned in 15.3.11.1.1.1. Temp_BSID is a diversity set member ID assigned to this BS. Undecided (TBD) Quantized Correlation Matrix 6 bits for 2Tx, 28 bits for 4Tx, 120 bits for 8Tx Undecided (TBD) [~ 6] byte BR header for rtPS

In the case of a grouped UE, the base station may poll at a predetermined period for uplink for bandwidth request during a duration. The grouped terminals may all use the same validity period and period, or may separately designate the validity period and period for each terminal. In this case, allocation information of a plurality of terminals grouped in one polling A-MAP IE may be included. In the A-MAP IE of the grouped UEs, the following parameter information may be further added to the contents described in Table 1 above.

Terminal identifier information may be further included. The terminal identifier may be a terminal ID (or a station ID), a reduced ID, a compacted ID, a BRCH ID, and the like as the terminal indicator. In addition, the number information of the grouping terminal may be further included. The size information of the number of groups of UEs may be 8 bits. In addition, the validity period and period information about the grouped terminals may be further included.

The case of validity period and period are same or different per IE. The validity indicator may be 1 bit in size, and when the validity indicator indicates 0, it may mean that the grouped terminals have the same validity period. In contrast, when the validity indicator indicates 1, the validity information is further added for each grouped terminal. Can be. In addition, when the period indicator indicates 0, all of the grouped terminals have the same period. Otherwise, if the period indicator indicates 1, the period information may be further added for each grouped terminal.

Consider the case where the expiration date and period are partially the same or different per IE.

The validity indicator may be 1 bit in size. If the validity indicator indicates 0, it may mean that the validity indicator has the same validity period as the previous terminal. Otherwise, if the validity indicator indicates 1, the validity information may be further added. . In addition, if the period indicator indicates 0, it may mean that it has the same period as the previous terminal, otherwise, if it indicates 1, period information may be further added.

In addition, report mode information may be further included. The reporting mode information may have a size of 1 bit, and if 0 is indicated, the total information for bandwidth request is indicated, and if it is 1, it may mean bandwidth request size (BR size).

In addition, length information may be further included. This length information size may be 4 bits and may indicate the length of the message in bytes.

As the number of terminals supported for the real-time polling service increases, the base station may reduce downlink overhead (eg, Polling A-MAP IE) transmitted to each terminal.

In short, when allocating uplink resources of individual or grouped UEs supported with the real-time polling service according to the present invention, downlink resources can be efficiently used and an overhead of resources can be reduced.

As described above, a method of transmitting a signal by a terminal using a real-time polling service may be performed by various units including a processor in a terminal device to be described below.

4 is a block diagram illustrating an example of a structure of a terminal device.

Referring to FIG. 4, the terminal device may include an RF unit 410, a display unit 420, a user interface 430, a processor (or a digital signal processor) 440, and a memory 450. In addition, the terminal device may further include a power management module (not shown), an antenna (not shown), a battery (not shown), a subscriber identifier module (SIM) card (not shown) (optional), and a speaker (not shown). It may also include.

The user may input indication information such as a telephone number into the user interface unit 430. Processor 440 receives and processes the indication information to perform suitable functions such as telephone number dialing. In addition, the processor 440 may transmit to the display unit 420 to display the instruction and operation information for the user's reference and convenience.

The processor 440 may communicate the indication information to the RF unit 410 to initiate communication, such as, for example, transmitting a wireless signal comprising voice communication data. The RF unit 410 may include a transmitter and a receiver for transmitting and receiving wireless signals. At this time, the antenna facilitates transmission and reception of a radio signal. Upon receiving the wireless signal, the RF unit 410 may forward the received wireless signal and convert the signal to a baseband frequency for the processor 440 to process the signal. The signal processed by the processor 440 may be audible through the speaker or may be output as readable information. The memory unit 450 may be located inside or outside the processor, and may exchange data with the processor by various known means. The software code may be stored in the memory unit 450 and driven by the processor 440.

The processor 440 may include protocols and functions necessary to perform various processes described herein for IEEE 802.16m, Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), and the like.

The embodiments described above are the components and features of the present invention are combined in a predetermined form. Each component or feature is to be considered optional unless stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.

Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of a hardware implementation, an embodiment of the present invention may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), FPGAs ( Field Programmable Gate Arrays), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code may be stored in a memory unit and driven by a processor. The memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above detailed description should not be interpreted as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description in order to provide a thorough understanding of the present invention, provide an embodiment of the present invention and together with the description, illustrate the technical idea of the present invention.

1 is a diagram showing an example of a commonly used unicast polling method;

2 is a diagram illustrating an uplink allocation process for supporting a real-time polling service to two terminals;

3 is a diagram schematically showing an uplink allocation procedure for supporting a real-time polling service, and

4 is a block diagram illustrating an example of a structure of a terminal device.

Claims (13)

In the method for the terminal to transmit a signal using a real-time scheduling service, Receiving uplink scheduling information for an individual terminal or a grouped terminal from a base station; And Transmitting the bandwidth request message to the base station at least once based on the uplink scheduling information, The uplink scheduling information includes a time point at which the terminal transmits a bandwidth request message, a transmission period of the bandwidth request message, an uplink duration allocated for a specific scheduling service of the terminal, and the uplink scheduling service. Signal transmission method comprising uplink resource allocation information. The method of claim 1, And receiving the changed uplink scheduling information from the base station when any one of the uplink scheduling information is changed. The method of claim 1, The bandwidth request message transmission step, And transmitting, by the terminal, the bandwidth request message to a base station at a timing corresponding to the time point at which the received bandwidth request message is transmitted. The method of claim 1, And receiving information regarding an uplink resource allocation region to which the terminal transmits data in response to the bandwidth request message from the base station. The method of claim 4, wherein And transmitting data to the base station using the uplink resource allocation region for the received data transmission. The method of claim 1, The bandwidth request message includes one or more of a flow ID of the terminal, priority between the terminals, and bandwidth size information. The method of claim 1, And re-receiving the uplink scheduling information from the base station when the received validity period has elapsed. The method of claim 1, The uplink resource allocation information includes the number of allocated OFDMA symbols, the number of subchannels, the allocated OFDMA symbol offset and the subchannel offset information. The method of claim 1, The uplink scheduling information for the grouped terminals may include a terminal identifier, the number of grouped terminals, information on whether the bandwidth request message of the grouped terminals is the same, and whether the uplink validity period is the same, and the bandwidth request size. And reporting mode information indicating overall information for a bandwidth request and length information of the bandwidth request message. In the method for transmitting a signal to provide a real-time scheduling service, Transmitting uplink scheduling information for an individual terminal or a grouped terminal; Receiving the bandwidth request message one or more times based on the uplink scheduling information from the terminal; The uplink scheduling information includes a time point at which the terminal transmits a bandwidth request message, a transmission period of the bandwidth request message, an uplink duration allocated for a specific scheduling service of the terminal, and the uplink scheduling service. Signal transmission method comprising uplink resource allocation information. The method of claim 10, And transmitting information on an uplink resource allocation region of data to be transmitted by the terminal with respect to the bandwidth request message received from the terminal. The method of claim 10, The base station further comprises the step of transmitting the changed uplink scheduling information to the terminal when any one of the uplink scheduling information, signal transmission method. The method of claim 10, And allocating an uplink resource region corresponding to the bandwidth request of the terminal.

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