KR20110055013A - Uplink Resource Allocation Method and System for Voice Service - Google Patents

Abstract

According to the present invention, the base station allocates uplink resources such as code number and slot number to a user terminal when a voice packet service of the user terminal is turned on. The present invention relates to a method and system for allocating uplink resources for a voice service, wherein the resources are allocated at the end of the voice service.

The base station according to the present invention allocates an uplink resource for uplink transmission to the user terminal in the on state of the voice packet service for the user terminal and until the end of the on state of the voice packet service. Receiving a voice packet from the user terminal through the allocated uplink resources at predetermined time intervals, and upon termination of the ON state of the voice packet service, the allocated uplink resource is recovered from the user terminal, and E- Assigns an uplink resource for SID packet transmission to the user terminal using AGCH, receives an SID packet every 160 ms from the user terminal through an uplink resource for SID packet transmission allocated to the user terminal, and turns off. At the end of the state, uplink resources for SID packet transmission are recovered.

According to the present invention, since the voice service support technology in the TDD HSUPA allocates uplink resources to reflect the generation characteristics of the voice traffic, a frequent resource allocation process of the base station can be avoided and fixed because it uses a high speed packet transmission technology. Compared with the conventional method of allocating a radio resource, uplink voice service capacity can be greatly improved.

In addition, compared to the prior art in which the delay time becomes very long as the control information according to the on or off state transition of the voice service is transmitted, the present invention has a very short delay time because the state transition is made dynamically by the determination of the base station. Voice service can be provided in a short time. In addition, since the base station can know the state of the terminal more quickly, and because the CDMA scheme is used, a plurality of pieces of information can be simultaneously transmitted uplink unlike TDMA. In addition, it is possible to support a voice service by switching a TDMA-based scheme to a TD-SCDMA environment, and perform efficient uplink scheduling for voice packets and SIDs. In addition, it is possible to suppress the frequent transmission of control information by the base station and improve the capacity of voice service per cell by using a high-speed uplink transmission scheme.

Description

System and method for allocating a resource in uplink for voice services in high-speed wireless communication networks}

The present invention relates to a method and system for allocating uplink resources for voice services in a Time Division Duplexing (TDD) high-speed uplink packet access (HSUPA) system. ) E-AGCH is used to allocate uplink resources such as code number and slot number to the user terminal at the time of use, and to be used continuously until the end of the voice service at a predetermined time interval. The present invention relates to an uplink resource allocation method and system for voice service.

In general, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) is one of the third generation (3G) mobile communication technologies that combines the advantages of TDD / TDMA and CDMA. The TD-SCDMA system was proposed by the China Wireless Technology Standard (CWTS) Group in 1998 based on the huge potential of the Chinese mobile communication market, and was established as a 3G standard by the International Telecommunications Union (ITU) in May 2000. The following year, in March 2001, the 3GPP (The Third Generation Partnership Project), which is responsible for standardizing third-generation mobile communication systems, was registered as a formal standard included in Release 4.

TD-SCDMA, as the name suggests, combines Time Division Duplexing (TDD) and Time Division Multiple Access (TDMA) technologies with synchronous CDMA technology. Thus, it has unique advantages over other 3G technologies such as WCDMA and CDMA 2000, such as flexible frequency allocation, low cost transceiver implementation, and simple network evolution from GSM systems. Compared with the existing Wideband Code Division Multiple Access (WCDMA), this technology can be said to replace the wireless access technology with TD-SCDMA rather than WCDMA. In fact, 3GPP, which prepares WCDMA and TD-SCDMA standards, treats the rest as WCDMA except for the physical layer and the second layer of the air interface. Therefore, it can be said that the basic structure of TD-SCDMA is the same as that of the WCDMA system.

On the other hand, High-Speed Uplink Packet Access (HSUPA) technology is a technology that can improve the uplink transmission speed up to 2.23Mbps by utilizing the existing TD-SCDMA system scheme. This TDD-based HSUPA technology improves the maximum transmission speed and cell throughput of the terminal and reduces the traffic latency. To this end, HSUPA has adopted techniques to increase the transmission speed based on the existing TD-SCDMA technology.

In the data transmission process adopted by the HSUPA, the terminal first requests radio resources for uplink through an Enhanced Random Access Uplink Channel (E-RUCCH), and the base station scheduler decides to allocate uplink resources to the corresponding terminal. -Transmit the grant message through the Enhanced Absolute Grant Channel (AGCH). When the terminal receives the grant message through the E-AGCH and knows that the resource is allocated to the terminal, the terminal transmits data through the Enhanced Physical Uplink Channel (E-PUCH) based on the allocated resource. When the base station receives data through the E-PUCH, the base station returns whether the data is successfully received (ACK or NACK) to the terminal.

On the other hand, the use of the high-speed packet transmission service can significantly improve the transmission capacity of the voice as compared to supporting the voice service using the circuit switched method. First, since TDD HSDPA / HSUPA uses 16QAM, the voice capacity is doubled up to 2 times if proper scheduling is ensured. In addition, the voice capacity may be additionally increased up to 2 times by utilizing ON / OFF occurrence patterns of voice traffic. Therefore, the overall performance improvement can be expected up to four times.

Since voice service is a time-sensitive real-time service, scheduling function is very important in packet switching system. The existing TDD HSDPA / HSUPA additionally defines and uses a non-scheduled mode to guarantee QoS of real-time services such as voice. In this mode, the base station scheduler does not continuously transmit scheduling control information, and the terminal continuously uses fixed radio resources. However, such fixed resource allocation has a disadvantage in that it does not fully utilize the dynamic resource allocation function of HSDPA / HSUPA. If the voice packet does not occur, it is necessary to use the dynamic scheduling function of the base station as the resources are continuously occupied, and control information is exchanged for services that need to guarantee low data transmission speed and real-time performance, such as voice service. The burden can be great.

In particular, compared to downlink which can easily implement a dynamic scheduling function considering the delay time of a voice packet, scheduling of a real-time service is very complicated in uplink requiring control between multiple terminals.

An object of the present invention for solving the above problems is, by the base station to allocate the uplink resources such as code number and slot number to the user terminal by using the E-AGCH when the voice packet service of the user terminal (ON) state An uplink resource allocation method and system for a voice service, a base station and an uplink resource allocation method, which are configured to be continuously used at a predetermined time interval until the termination of the voice service and to recover resources allocated at the end of the voice service. In providing.

The uplink resource allocation system for a voice service according to the present invention for achieving the above object, allocates a code number and a slot number for uplink transmission to a user terminal in the ON state of the voice packet service, A base station receiving voice packets at predetermined time intervals from the user terminal until an ON state of a voice packet service ends; And a user terminal for receiving a code number and a slot number for uplink transmission from the base station in the ON state of the voice packet service, and transmitting a voice packet to the base station using the assigned code number and slot number. Include.

On the other hand, the base station according to the present invention for achieving the above object, a communication unit for communicating with the user terminal; A resource allocator for allocating an uplink resource to the user terminal; A scheduling unit which schedules a data packet using the allocated uplink resource; And allocating an uplink resource for uplink transmission to the user terminal in the on state of the voice packet service for the user terminal, and assigning the uplink resource for the uplink transmission until the end of the on state of the voice packet service. And a control unit controlling to receive a voice packet at a predetermined time interval from the user terminal through a link resource.

The controller may allocate a code number and a slot number to the user terminal using the E-AGCH through the resource allocator when the voice packet service is in an ON state.

In addition, the controller receives the voice packet from the user terminal through the allocated uplink resource until the end of the ON state of the voice packet service at regular intervals.

The control unit may recover the allocated uplink resource from the user terminal at the end of the ON state of the voice packet service, and obtain a code number and a slot number for transmitting an SID packet using an E-AGCH. Assign to the user terminal.

The controller may be configured to turn off the SID packet at a predetermined time interval from the user terminal through a code number and a slot number for SID packet transmission allocated to the user terminal when the voice packet service is turned off when the ON state of the voice packet service ends. Receive

The controller recognizes that the ON state of the voice packet service is terminated when the voice packet is not received at the predetermined position or when the SID packet is received through the E-PUCH.

In addition, the control unit recognizes that the voice packet service is ON by receiving a voice packet from the user terminal or receiving control information using the E-RUCCH.

In addition, the control unit, when the end of the off state becomes the on state of the next voice service to recover the pre-allocated uplink resources and allocates uplink resources for voice packet transmission.

The controller controls the voice packet received through the control information and the E-RUCCH included in the SID packet after the OFF state is turned OFF due to the ON state of the voice packet service. Recognize it through control information received through the E-RUCCH.

Meanwhile, an uplink resource allocation method for a voice service according to the present invention for achieving the above object is an uplink resource allocation method for a voice service of a system including a user terminal and a base station, and (a) the user terminal. Requesting a voice service from the base station; (b) the base station assigning a code number and a slot number to the user terminal using an E-AGCH; (c) the user terminal transmitting a voice packet to the base station at intervals of 20 ms using the code number and the slot number; And (d) the base station recovering the code number and the slot number from the user terminal at the end of the voice service.

Meanwhile, an uplink resource allocation method for voice service of a base station according to the present invention for achieving the above object is an uplink resource allocation method for voice service of a base station providing a voice service to a user terminal. Recognizing an ON state of a voice packet service for the user terminal; (b) allocating an uplink resource to the user terminal; (c) receiving a voice packet from the user terminal at predetermined time intervals; (d) determining whether an ON state of the voice service is terminated; (e) recovering the uplink resource and allocating an uplink resource for SID packet transmission at the end of the on state; (f) receiving the SID packet at regular time intervals from the user terminal; And (g) at the end of the off state, recovering uplink resources for the SID packet transmission.

In addition, step (a) recognizes an ON state of the voice packet service through receiving a voice packet from the user terminal using E-RUCCH or receiving related control information.

In addition, the step (b) allocates the code number and the slot number to the user terminal using the E-AGCH.

In the step (c), the voice packet is received from the user terminal through the allocated uplink resource until the end of the ON state of the voice packet service at a predetermined time interval.

In addition, in the step (e), the allocated uplink resource is recovered from the user terminal when the OFF state is terminated by the ON state of the voice packet service, and the code number for transmitting the SID packet using the E-AGCH. And a slot number assigned to the user terminal.

In addition, in step (e), the termination of the ON state of the voice packet service is recognized when a voice packet is not received at a predetermined position or an SID packet is received through an E-PUCH.

In addition, the step (f) receives the SID packet at regular intervals from the user terminal through a code number and slot number for SID packet transmission allocated to the user terminal.

The step (g) recognizes the termination of the off state through control information included in the SID packet, voice packet received through the E-RUCCH, and control information received through the E-RUCCH.

According to the present invention, since the voice service support technology in the TDD HSUPA allocates uplink resources to reflect the generation characteristics of the voice traffic, a frequent resource allocation process of the base station can be avoided and fixed because it uses a high speed packet transmission technology. Compared with the conventional method of allocating a radio resource, uplink voice service capacity can be greatly improved.

In addition, compared to the prior art in which the delay time becomes very long as the control information according to the on or off state transition of the voice service is transmitted, the present invention has a very short delay time because the state transition is made dynamically by the base station. Voice service can be provided in a short time.

In addition, since the base station can know the state of the terminal more quickly, and because the CDMA scheme is used, a plurality of pieces of information can be simultaneously transmitted uplink unlike TDMA.

In addition, it is possible to support a voice service by switching a TDMA-based scheme to a TD-SCDMA environment, and perform efficient uplink scheduling for voice packets and SIDs.

In addition, it is possible to suppress the frequent transmission of control information by the base station and improve the capacity of voice service per cell by using a high-speed uplink transmission scheme.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The most basic mode of operation adopted by TD-SCDMA technology is TDD (Time Division Duplexing). That is, a service is provided using the same band without separating frequencies for uplink and downlink.

By using the TDD scheme, since the uplink and the downlink are not separated, a guard band for frequency separation is not required, and asymmetric services can be supported in both directions, thereby maximizing frequency efficiency.

In addition, the transmitter and receiver RF modules must be separately implemented in the FDD transceiver, but TD-SCDMA can use a single RF module for transmission and reception, thereby enabling a low-cost transceiver.

In addition, since propagation characteristics of channels for downlink and uplink are also very similar, system capacity can be improved by utilizing smart antenna technology and joint detection technology.

1 is a diagram illustrating a basic frame structure of a TD-SCDMA physical channel applied to an embodiment of the present invention.

In FIG. 1, a frame of TD-SCDMA has a length of 10 ms. Multiple frames are bundled together to form a super frame, and each frame consists of two 5ms long sub-frames. In particular, the basic unit for data transmission in TD-SCDMA becomes a sub-frame.

The downlink signal and the uplink signal coexist in one sub-frame, and the point in time at which the transmission direction is changed is called a switching point. In TD-SCDMA, there are always two switching points in one sub-frame as shown in FIG. 1. Of the seven time slots (TS), TS0 is always assigned downlink and TS1 is always assigned uplink. Since the data transfer directions of TS0 and TS1 are different, this point is also a switching point. The remaining timeslots can be freely adjusted in length to allocate up / down to support asymmetric traffic. In FIG. 1, four timeslots are allocated to downlink and three timeslots are allocated to uplink. Since the direction of the link is switched between TS3 and TS4, this boundary becomes another switching point. Within each sub-frame, a special signal to support the operation of the TDD system is added, along with seven timeslots. This information is defined between TS0 and TS1, respectively. It is called GP (Guard Period). DwPTS is a signal for transmitting pilot information for downlink and is used for downlink synchronization and initial cell search. UpPTS consists of a total of 160 chips, 32 chips are used as GP, and the remaining 128 chips are used as SYNC. This SYNC signal is used for uplink initial synchronization, random access procedure, measurement of neighbor cell during handover, and so on. GP consists of 96 chips with a guard period that prevents overlap between DwPTS and UpPTS signals.

HSUPA uses 16-QAM modulation, Adaptive Modulation & Coding (AMC), Hybrid ARQ (HARQ), high-speed scheduling, and various spreading factors (SF) to increase the transmission speed based on the existing TD-SCDMA technology. Techniques were adopted.

16-QAM modulation is a modulation scheme (4 bits / symbol) that doubles the number of transmitted bits per symbol compared to the conventional QPSK. In HSUPA, QPSK is also used.

Adaptive Modulation & Coding (AMC) is a technology that dynamically applies modulation and channel coding rates according to uplink channel conditions. For example, QPSK and 16-QAM may be selectively selected according to the state of the uplink channel.

Hybrid ARQ (HARQ) combines Forward Error Correction (FEC) and Automatic Repeat Request (ARQ) to quickly recover from errors in the physical layer. The success rate of the packet can be increased by combining the previously transmitted packet and the retransmitted packet to lower the coding rate.

In the case of high-speed scheduling, in the early TD-SCDMA, a scheduling function is located in a radio network controller (RNC), which causes a large delay in transmission control information. However, in HSUPA, the scheduling function is moved to a base station closer to the terminal. Transmission control information can be transmitted more quickly.

In the case of various spreading factors (SF), the terminal can select various transmission speeds. In this case, the method used is a method of changing the spreading coefficient according to the data transmission rate (spreading factors are 1, 2, 4, 8, 16).

The largest spreading factor (SF) used in the physical layer of TD-SCDMA is 16, and this SF16 code becomes a basic radio resource. That is, one SF16 code used in a specific timeslot is called 1 resource unit (RU). Therefore, it can be said that one time slot has a total of 16RU resources. Similarly, the concept of RU can be applied even when having a lower diffusion coefficient. For example, since the SF4 code has the same transmission capacity as four SF16 codes, it can be regarded as a resource corresponding to 4 RUs.

2 is a diagram illustrating a data transmission process adopted by HSUPA according to an embodiment of the present invention.

The transmission time interval (TTI), which is a basic transmission interval related to data transmission in HSUPA, is 5 ms. All resources for uplink transmission, such as transmit power, timeslots, and code resources, are allocated by the base station. In addition, various physical channels for uplink high-speed data transmission have been added in HSUPA. First, an E-PUCH (enhanced physical uplink channel) is a channel for transmitting data in uplink, and one code (SF = 1, 2, 4, 8, 16) per slot is allocated to each user. Control channels supporting transmission of the E-PUCH include an enhanced uplink control channel (E-UCCH) and an enhanced random access uplink channel (E-RUCCH). The E-UCCH is often multiplexed with the E-PUCH, and the E-RUCCH uses uplink resources that contend with other terminals. The E-UCCH includes control information related to the decoding of the E-PUCH, and the E-PUCCH is used when the terminal requests radio resources for uplink transmission from the base station. An enhanced acknowledgment indicator channel (E-HICH) is a downlink channel indicating whether reception is successful at the base station for uplink transmission through the E-PUCH. In addition, there is an enhanced absolute grant channel (E-AGCH) as a downlink control channel for supporting uplink scheduling, which includes a scheduling control message transmitted from each terminal by a base station.

The data transmission process adopted by the HSUPA is shown in FIG. First, the base station allocates an E-PUCH channel resource to a specific terminal through the E-AGCH, and the terminal transmits data using the assigned E-PUCH resource. The base station transmits an acknowledgment of the received data through the E-HICH (ACK or NACK). In FIG. 2, nE-AGCH represents the interval between the start of the E-AGCH and the first slot of the E-PUCH, which is set to 6 in the standard. E-PUCH resources allocated by the base station may be allocated from 1 to 5 depending on the location of the switching point, each terminal may be allocated a continuous slot to the limit not exceeding this. However, for convenience of implementation, the code and SF used in each slot are the same during a specific subframe. When the uplink transmission is completed, whether the transmission is successful is received through the E-HICH. At this time, the received E-HICH maintains an interval as much as nE-HICH with the last slot of the E-PUCH. This value is set by the upper layer and has a value between 4 and 15.

In the present invention, the characteristic that the generation period of the voice packet is 20 ms is used. Immediately after the voice traffic is turned ON, a code and a slot for uplink transmission must be designated, so that the base station starts the ON state and when the first packet is received, an uplink resource to be used in the future through the E-AGCH. Allocate Once the uplink code and the transmission location (= time slot) are determined, the corresponding terminal continuously transmits data at 20 ms intervals by using the previously used radio resource without using the E-AGCH. If the terminal transitions to the OFF state, it is necessary to recover the previously allocated RU. However, the base station scheduler expects a voice packet to occur for 1 second on average, but does not know the exact end time.

There may be various ways of informing the terminal of termination of the ON state. First, the base station can know the end of the ON state when the voice packet does not arrive at the predetermined position. In another implementation, the terminal may transmit the SID indicating the end of the ON state using a pre-reserved RU. Recognizing that the OFF state has started, the base station can allocate a fixed radio resource using the E-AGCH for SID packet transmission.

The method for transmitting the voice packet in the initial ON state to the base station may use a random access procedure using the E-RUCCH. In addition, if a voice packet is generated at the time of transmitting the SID, the terminal may transmit information indicating the start of the ON state to the SID packet. However, considering that the generation period of the SID is about 160 ms and the voice packet should guarantee a delay time of 40 ms or less, the method of notifying the start of the ON state using the SID may be limited.

In addition, since the TDD HSUPA supports retransmission by HARQ, if the delay time between the terminal and the base station is very small, the TDD HSUPA may support retransmission of the real-time service. However, since the terminal uses a fixed resource in the ON state without scheduling, a separate E-AGCH should be used when retransmission is required.

3 is a configuration diagram schematically showing the overall configuration of an uplink resource allocation system for voice service according to an embodiment of the present invention.

Referring to FIG. 3, the uplink resource allocation system 300 according to the present invention includes a user terminal 310, a communication network 320, and a base station 330.

The user terminal 310 receives a code number and a slot number for uplink transmission from the base station 330 in the ON state of the voice packet service, and transmits a voice packet to the base station 330 using the assigned code number and slot number. ).

The communication network 320 is a mobile communication network, and includes a CDMA 2000 1x, a CDMA 2000 1x EV-DO, a WCDMA network, a TD-SCDMA network, and the like.

The base station 330 allocates a code number and a slot number for uplink transmission to the user terminal 310 in the ON state of the voice packet service, and the user terminal (until the end of the ON state of the voice packet service). 310 receives voice packets at regular time intervals.

4 is a configuration diagram schematically showing a functional block of a base station according to an embodiment of the present invention.

Referring to FIG. 4, the base station 330 according to the present invention includes a communication unit 410, a resource allocation unit 420, a scheduler 430, and a control unit 440.

The communication unit 410 communicates with the user terminal 410 through the communication network 420.

The resource allocator 420 allocates uplink resources to the user terminal 310.

The scheduler 430 schedules the data packet using the allocated uplink resources.

The controller 440 allocates an uplink resource for uplink transmission to the user terminal 310 when the voice packet service for the user terminal 310 is on, and the voice packet service is on. Control to receive voice packets from the user terminal 310 at predetermined time intervals through the allocated uplink resources until termination.

In addition, the controller 440 allocates the code number and the slot number to the user terminal 310 by using the E-AGCH through the resource allocator 420 in the ON state of the voice packet service.

In addition, the controller 440 receives a voice packet from the user terminal through an allocated uplink resource until the end of the ON state of the voice packet service at an interval of 20 ms.

In addition, the control unit 440 recovers the allocated uplink resources from the user terminal at the end of the ON state of the voice packet service, and stores the code number and the slot number for the SID packet transmission using the E-AGCH. Assign to the user terminal.

In addition, when the ON state of the voice packet service is terminated, the controller 440 receives the SID packet at 160 ms intervals from the user terminal through a code number and a slot number for SID packet transmission allocated to the user terminal. .

In addition, the controller 440 recognizes that the ON state of the voice packet service is terminated when the voice packet is not received at the predetermined position or the SID packet is received through the E-PUCH.

In addition, the control unit 440 recognizes that the voice packet service is on by receiving a voice packet from the user terminal or receiving control information using the E-RUCCH.

In addition, when the off state is terminated, the controller 440 recovers pre-allocated uplink resources and allocates uplink resources for voice packet transmission.

The controller 440 recognizes the end of the off state through the control information included in the SID packet, the voice packet received through the E-RUCCH, and the control information received through the E-RUCCH.

5 is a flowchart illustrating an uplink resource allocation method for voice service according to an embodiment of the present invention.

Referring to FIG. 5, the user terminal 310 requests a voice service from the base station 330 (S510).

Accordingly, the base station 330 allocates the code number and the slot number to the user terminal 310 by using the E-AGCH (S520).

Subsequently, the user terminal 310 transmits a voice packet to the base station 330 at intervals of 20 ms using the assigned code number and slot number (S530).

Thereafter, the base station 330 recovers the code number and the slot number from the user terminal 310 at the end of the voice service (S540).

6 is a flowchart illustrating an uplink resource allocation method for voice service of a base station according to an embodiment of the present invention.

Referring to FIG. 6, when the base station 330 recognizes the ON state of the voice packet service for the user terminal 310 (S602), the base station 330 allocates an uplink resource to the user terminal 310. (S604).

Here, the uplink resource includes a code number and a slot number, and the base station 330 allocates the code number and the slot number to the user terminal 310 using the E-AGCH as shown in FIG. 7. 7 illustrates uplink resource allocation using an ON / OFF occurrence pattern according to an embodiment of the present invention.

At this time, the base station 330 receives the voice packet from the user terminal 310 by using the E-RUCCH, or recognizes the ON state of the voice packet service through the received control information.

Subsequently, the base station 330 receives a voice packet from the user terminal 310 at predetermined time intervals (S606).

That is, the base station 330 receives the voice packet from the user terminal 310 until the end of the ON state of the voice packet service through the allocated uplink resource, code number, and slot number at 20 ms intervals.

Subsequently, the base station 330 determines whether the ON state of the voice service is terminated, and at the end of the ON state (S608-Yes), recovers the uplink resource and allocates an uplink resource for SID packet transmission (S608-Yes). S610).

That is, the base station 330 recovers the code number and the slot number assigned to the user terminal 310 from the user terminal 310 when the OFF state is terminated due to the ON state of the voice packet service. As described above, the code number and the slot number for SID packet transmission are allocated to the user terminal 310 using the E-AGCH.

At this time, the termination of the ON state of the voice packet service is recognized when the voice packet is not received at the predetermined position or when the SID packet is received through the E-PUCH.

Subsequently, the base station 330 receives the SID packet at a predetermined time interval from the user terminal 310 (S612).

That is, the base station 330 receives the SID packet at regular time intervals, for example, at 160 ms intervals, from the user terminal 310 through the code number and the slot number for the SID packet transmission allocated to the user terminal 310.

Subsequently, the base station 330 recovers uplink resources for SID packet transmission from the user terminal 310 at the end of the off state (S614-Yes) (S616). Here, the end of the off state means the on state of the next voice service.

At this time, the base station 330 recognizes the end of the off state through the control information included in the SID packet, the voice packet received through the E-RUCCH, and the control information received through the E-RUCCH.

When the OFF state is terminated and a new voice packet is generated, the base station 330 may receive a message indicating that the ON state is resumed by using the E-RUCCH or SID packet from the user terminal 310. Accordingly, the base station 330 allocates an uplink resource to the user terminal 310 to use during the new ON state using the E-AGCH as shown in FIG. 7. This process is repeated until the voice call ends.

As described above, according to the present invention, the base station allocates an uplink resource such as a code number and a slot number to the user terminal at a predetermined time interval by using the E-AGCH in the ON state of the voice packet service of the user terminal. An uplink resource allocation method and system for a voice service, a base station, and an uplink resource allocation method thereof, which are configured to be used continuously until the end of the voice service and to recover resources allocated at the end of the voice service, can be realized. .

As those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features, the embodiments described above are exemplary in all respects and are not intended to be limiting. You must do it. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

The present invention can be applied to a TDD HSUPA system for allocating uplink resources for voice service.

In addition, it can be applied to the base station to allocate the uplink resources by reflecting the generation characteristics of the voice traffic, and can be applied to the terminal continuously used without additional instructions of the base station for a certain period of time.

In addition, the present invention can be applied to a system in which frequent transmission of control information of a base station is suppressed and a capacity of a voice service per cell needs to be increased by using a fast uplink transmission scheme.

1 is a diagram illustrating a basic frame structure of a TD-SCDMA physical channel applied to an embodiment of the present invention.

2 is a diagram illustrating a data transmission process adopted by HSUPA according to an embodiment of the present invention.

3 is a configuration diagram schematically showing the overall configuration of an uplink resource allocation system for voice service according to an embodiment of the present invention.

4 is a configuration diagram schematically showing a functional block of a base station according to an embodiment of the present invention.

5 is a flowchart illustrating an uplink resource allocation method for voice service according to an embodiment of the present invention.

6 is a flowchart illustrating an uplink resource allocation method for voice service of a base station according to an embodiment of the present invention.

7 illustrates uplink resource allocation using an ON / OFF occurrence pattern according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

300: uplink resource allocation system 310: user terminal

320: communication network 330: base station

410: communication unit 420: resource allocation unit

430: scheduler 440: control unit

Claims (19)

In the ON state of the voice packet service, a code number and a slot number for uplink transmission are allocated to the user terminal, and the voice packet is transmitted from the user terminal at predetermined time intervals until the ON state of the voice packet service ends. A base station for receiving the; And A user terminal that receives a code number and a slot number for uplink transmission from the base station and transmits a voice packet to the base station using the assigned code number and slot number when the voice packet service is in an ON state; Uplink resource allocation system for a voice service comprising a. A communication unit for communicating with a user terminal; A resource allocator for allocating an uplink resource to the user terminal; A scheduling unit which schedules a data packet using the allocated uplink resource; And When the voice packet service for the user terminal is in an ON state, an uplink resource for uplink transmission is allocated to the user terminal, and the allocated uplink until the ON state of the voice packet service is terminated. A control unit controlling to receive a voice packet at a predetermined time interval from the user terminal through a resource; Base station comprising a. The method of claim 2, The controller may be configured to allocate a code number and a slot number to the user terminal using an enhanced absolute grant channel (E-AGCH) through the resource allocator when the voice packet service is in an ON state. . The method of claim 2, The control unit, through the allocated uplink resources, the base station, characterized in that for receiving a voice packet from the user terminal until the end of the ON state of the voice packet service at regular intervals. The method of claim 2, The controller may recover the allocated uplink resource from the user terminal when the voice packet service is turned off by ending the on state of the voice packet service and transmit a Silence Insertion Descriptor (SID) packet using an E-AGCH. And a code number and a slot number for the base station are allocated to the user terminal. The method of claim 2, The control unit receives the SID packet at regular intervals from the user terminal through a code number and slot number for SID packet transmission allocated to the user terminal when the ON state of the voice packet service is terminated. Base station. The method of claim 2, The controller determines that the ON state of the voice packet service is terminated when a voice packet is not received at a predetermined position or when an SID packet is received through an Enhanced Physical Uplink Channel (E-PUCH). . The method of claim 2, The control unit is a base station, characterized in that to receive the voice packet from the user terminal using the E-RUCCH or when the related control information is received to the ON (ON) state of the voice packet service. The method of claim 5, The control unit, when the end of the OFF (OFF) state of the next voice service, the base station, characterized in that to recover the pre-allocated uplink resources and allocate uplink resources for voice packet transmission. The method of claim 2, The control unit, after the OFF state by the end of the ON state of the voice packet service, the control information contained in the SID packet, E-RUCCH (Enhanced Random access Uplink Channel) to terminate the OFF state A base station characterized in that it is recognized through the voice packet received through the), the control information received through the E-RUCCH. An uplink resource allocation method for voice service of a system including a user terminal and a base station, (a) the user terminal requesting a voice service from the base station; (b) the base station assigning a code number and a slot number to the user terminal using an E-AGCH; (c) the user terminal transmitting a voice packet to the base station at predetermined time intervals using the code number and the slot number; And (d) the base station recovering the code number and the slot number from the user terminal at the end of the voice service; Uplink resource allocation method for a voice service comprising a. An uplink resource allocation method for voice service of a base station providing a voice service to a user terminal, (a) recognizing an ON state of a voice packet service for the user terminal; (b) allocating an uplink resource to the user terminal; (c) receiving a voice packet from the user terminal at predetermined time intervals; (d) determining whether an ON state of the voice service is terminated; (e) recovering the uplink resource and allocating an uplink resource for SID packet transmission when the off state is terminated due to the termination of the on state; (f) receiving the SID packet at regular time intervals from the user terminal; And (g) recovering uplink resources for transmitting the SID packet when the next voice service is turned on when the off state ends; Uplink resource allocation method for voice service of a base station comprising a. 13. The method of claim 12, In the step (a), the voice of the base station is characterized in that the voice packet is received from the user terminal using the E-RUCCH or the ON state of the voice packet service is recognized through the reception of the related control information. Uplink resource allocation method for service. 13. The method of claim 12, The step (b) of the uplink resource allocation method for the voice service of the base station, characterized in that for assigning the code number and the slot number to the user terminal using the E-AGCH. 13. The method of claim 12, In the step (c), the voice packet is received from the user terminal through the allocated uplink resource at a predetermined time interval until the end of the ON state of the voice packet service. Uplink resource allocation method. 13. The method of claim 12, In the step (e), when the ON state of the voice packet service is terminated, the allocated uplink resource is recovered from the user terminal and a code number for transmitting a SID (Silence Insertion Descriptor) packet using an E-AGCH. And a slot number assigned to the user terminal. The uplink resource allocation method for voice service of a base station. 13. The method of claim 12, In the step (e), the termination of the ON state of the voice packet service is recognized when the voice packet is not received at the predetermined position or when the SID packet is received through the E-PUCH. Uplink resource allocation method for service. 13. The method of claim 12, In the step (f), the uplink resource for the voice service of the base station, characterized in that the SID packet is received at a predetermined time interval from the user terminal through the code number and the slot number for the SID packet transmission allocated to the user terminal. Assignment method. 13. The method of claim 12, In the step (g), the end of the off state is recognized through the control information included in the SID packet, the voice packet received through the E-RUCCH, and the control information received through the E-RUCCH. Uplink resource allocation method for service.

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