KR100763012B1 - Transmission rate control method, mobile station, radio base station, and radio network controller - Google Patents

Abstract

The present invention provides an absolute transmission rate of uplink user data transmitted through an absolute transmission rate control channel (E-AGCH), and a relative transmission rate of uplink user data transmitted via a relative transmission rate control channel (E-RGCH). In the wireless communication system capable of controlling the transmission rate of the uplink user data, the transmission rate control method in which the mobile station controls the transmission rate of the uplink user data, the mobile station is E-DPDCH (Enhanced Dedicated Physical Data Channel) (C) notifying the information identifying the E-RGCH transmitted from the serving cell, without notifying the information identifying the E-RGCH when setting the N-RGCH; And the mobile station controls the transmission rate of the uplink user data based on the absolute transmission rate received from the serving cell via the E-AGCH, without considering the relative transmission rate.

Baud rate, mobile station, radio base station, radio network control station, uplink user data

Description

Transmission rate control method, mobile station, wireless base station and wireless network control station {TRANSMISSION RATE CONTROL METHOD, MOBILE STATION, RADIO BASE STATION, AND RADIO NETWORK CONTROLLER}

1 is an overall configuration diagram of a general mobile communication system.

2A to 2C are graphs illustrating a method of controlling a transmission rate of uplink user data in a conventional mobile communication system.

3 is an overall configuration diagram of a conventional mobile communication system.

4 is an overall configuration diagram of a mobile communication system according to the first embodiment of the present invention.

Fig. 5 is a functional block diagram of a mobile station in the mobile communication system according to the first embodiment of the present invention.

6 is a functional block diagram of a baseband signal processing unit of a mobile station in the mobile communication system according to the first embodiment of the present invention.

FIG. 7 is a diagram for explaining the functions of the baseband signal processing unit in the mobile station of the mobile communication system according to the first embodiment of the present invention.

Fig. 8 is a functional block diagram showing a MAC-e functional unit in the baseband signal processing unit in the mobile station of the mobile communication system according to the first embodiment of the present invention.

9 is a graph showing an example of operation of a four-channel stop and weight protocol performed by a HARQ processing unit included in a MAC-e function unit in a baseband signal processing unit in a mobile station of a mobile communication system according to the first embodiment of the present invention. Drawing.

Fig. 10 is a functional block diagram of the layer-1 functional unit in the baseband signal processing unit in the mobile station of the mobile communication system according to the first embodiment of the present invention.

Fig. 11 is a diagram for explaining the functions of the layer-1 functional unit in the baseband signal processing unit in the mobile station of the mobile communication system according to the first embodiment of the present invention.

12 is a functional block diagram of a wireless base station according to the first embodiment of the present invention.

13 is a functional block diagram of a baseband signal processing unit in a wireless base station of the mobile communication system according to the first embodiment of the present invention.

14 is a functional block diagram of a layer-1 functional unit in the baseband signal processing unit in the radio base station of the mobile communication system according to the first embodiment of the present invention.

Fig. 15 is a functional block diagram of a MAC-e functional unit in the baseband signal processing unit in the radio base station of the mobile communication system according to the first embodiment of the present invention.

Fig. 16 is a functional block diagram of a radio network control station of the mobile communication system according to the first embodiment of the present invention.

Fig. 17 is a sequential pattern diagram showing the operation of the transmission rate control method in the mobile communication system according to the first embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

UE: mobile station, Node B: radio base station, RNC: radio network control station,

1: switching center, 11: bus interface, 12: call processing control unit,

13: baseband signal processor, 14: transceiver, 15: transceiver antenna,

21: HWY interface, 22: baseband signal processor, 23: transceiver,

24: amplifying unit, 25: transmitting and receiving antenna, 26: call processing control unit,

31: switching center interface, 32: LLC layer function unit, 33: MAC layer function unit,

34: media signal processor, 35: radio base station interface, 221p: DPCH transmitter,

36: call processing control unit, 131: higher layer function unit, 132: RLC function unit,

133: MAC-d function unit, 134: MAC-e function unit, 134a: multiplexer,

134b: E-TFC selector, 134c: HARQ processor, 135: layer-1 functional part,

135a: transport channel encoder, 135b: physical channel mapping unit, 222: MAC-e function unit,

135c: E-DPDCH transmitter, 135d: E-DPCCH transmitter, 135e: E-HICH receiver,

135f: E-RGCH receiver, 135g: E-AGCH receiver, 135h: physical channel demapping unit,

135i: PRACH transmitter, 135j: S-CCPCH receiver, 135k: DPCH receiver,

221: layer-1 functional unit, 221a: E-DPCCH despread-lake synthesis unit,

221b: E-DPCCH decoding unit, 221c: E-DPDCH despreading-lake synthesis unit,

221d: buffer, 221e: re-despreading section, 221f: HARQ buffer, 222c: scheduling section

221g: error correction decoder, 221h: transport channel encoder,

222b: reception processing instruction unit, 221o: S-CCPCH transmission unit,

221i: physical channel mapping unit, 222d: demultiplexer, 222a: HARQ processing unit,

221j: E-HICH transmitter, 221k: E-AGCH transmitter, 221l: E-RGCH transmitter,

221m: PRACH despreading-rake synthesis section, 221n: PRACH decoding section,

The present invention relates to uplink user data based on an absolute transmission rate of uplink user data received by the mobile station through an absolute transmission rate control channel and a relative transmission rate of uplink user data received via a relative transmission rate control channel. In a wireless communication system capable of controlling the transmission rate of the present invention, the present invention relates to a transmission rate control method for controlling a transmission rate of uplink user data, and a mobile station, a wireless base station, and a wireless network control station used in such a transmission rate control method. .

In the conventional mobile communication system, when a dedicated physical channel (DPCH) is established between the mobile station UE and the radio base station Node B, the radio network control station RNC is configured by the radio base station Node B. Hardware resources (hereinafter referred to as "hardware resources"), radio resources on the uplink (amount of interference in the uplink), transmission power of the mobile station UE, transmission processing performance of the mobile station UE, or higher applications In consideration of the necessary transmission rate, the transmission rate of uplink user data is determined, and the determined transmission rate is layer-3 (Radio Resource Control layer) for the mobile station UE and the radio base station Node B. It is configured to notify as a message.

Here, the radio network control station RNC is an apparatus located above the radio base station Node B and controls the radio base station Node B and the mobile station UE.

In general, since data communication often generates bursts in comparison with voice communication and TV communication, it is desirable to be able to change the transmission speed of a channel used for data communication at a high speed.

However, as shown in FIG. 1, since a radio network control station (RNC) generally controls a large number of radio base stations (Node B) centrally and collectively, in a conventional mobile communication system, a radio network control station ( There is a problem that it is difficult to control the change of the transmission speed (for example, about 1 to 10 ms) at high speed of the uplink user data due to the processing load or the processing delay in the RNC.

In addition, in the conventional mobile communication system, even if the change to the transmission speed of the uplink user data can be controlled at high speed, there is a problem that the mounting cost of the device and the operating cost of the network are greatly increased.

For this reason, in the conventional mobile communication system, it is common to perform change control on the transmission rate of uplink user data on the order of several hundred milliseconds to several seconds.

Therefore, in the conventional mobile communication system, as shown in Fig. 2A, when performing data transmission in bursts, as shown in Fig. 2B, low speed, high delay, and low transmission efficiency are allowed. This allows data to be transmitted or, as shown in Fig. 2 (c), allows radio band resources in a usable state and hardware resources in the radio base station Node B to be wasted, thereby securing radio resources for high speed communication. This transmits data.

2 (b) and (c), it should be understood that the radio resources on the vertical axis can be applied to both the radio band resources and the hardware resources described above.

Thus, in the 3rd Generation Partnership Project (3GPP) and the 3GPP2, which are the international standardization bodies of the third generation mobile communication system, between the radio base station Node B and the mobile station UE in order to effectively use radio resources. High speed radio resource control methods in Layer-1 and Media Access Control (MAC) lower layers (layer-2) have been studied. This review or reviewed function will hereinafter be referred to collectively as "Enhanced Uplink" (EUL).

A mobile communication system to which "enhanced uplink" is applied will be described with reference to FIG.

In the example of FIG. 3, cell # 3 controlled by radio base station Node B # 1 serves a mobile station UE, which primarily controls the transmission rate of uplink user data transmitted by the mobile station UE. It is a cell (serving cell).

Cell # 4, controlled by a radio base station Node B # 2, is a non-serving cell for a mobile station UE in which a radio link is established with not only the serving cell but also the mobile station UE.

In such a mobile communication system, cell # 3 (serving cell of a mobile station (UE)) has an E-AGCH (Enhanced Absolute Rate Control Channel) for transmitting an absolute transmission rate of uplink user data to the mobile station (UE): Transmit Enhanced Relative Grant Channel (E-RGCH) for transmitting Enhanced Absolute Grant Channel and Relative Baud Rate (UP Command or DOWN Command) of Uplink User Data It is configured to.

Further, in such a mobile communication system, the mobile station UE has an "Ehanced Dedicated Physical Control Channel" (E-DPCCH) and an "Enhanced Dedicated" (E-DPDCH) for cell # 3 (a serving cell of the mobile station UE). Physical Data Channel) ".

In this mobile communication system, cell # 4 (non-serving cell of mobile station UE) is configured to transmit the E-RGCH to the mobile station UE.

In such a mobile communication system, when the mobile station UE establishes a data connection (DCH: Dedicated Channel / E-DPDCH) for transmitting uplink user data, the radio network control station (RNC) is connected to the mobile station UE. Information identifying the E-RGCH transmitted by cell # 3 [serving cell of mobile station UE] and information identifying the E-AGCH transmitted by cell # 3 [serving cell of mobile station UE]. It is configured to notify.

Then, the mobile station UE performs the reception process for the E-RGCH transmitted from the serving cell by using the channelization code and the sequence pattern of the E-RGCH. If the mobile station UE cannot determine the relative transmission rate of the uplink user data transmitted via the E-RGCH, the mobile station UE is configured to maintain the transmission rate of the uplink user data. When the mobile station UE can determine the relative transmission speed (up command or down command) of the uplink user data transmitted via the E-RGCH, the mobile station UE determines the result of such determination. Is configured to vary the transmission rate of uplink user data.

 However, in order to reduce the load in the wireless downlink, a mobile communication system in which the serving cell transmits only the E-AGCH and does not transmit the E-RGCH may be considered.

However, in the general mobile communication system, when the mobile station UE establishes data connection (DCH, E-DPDCH) for transmitting uplink user data, the E-RGCH is defined in the mobile station UE. Has a problem in that it cannot determine whether the serving cell is transmitting the E-RGCH or not.

In other words, even if the serving cell is not transmitting the E-RGCH, the mobile station UE causes false detection of the E-RGCH due to noise or the like, thereby unnecessarily changing the transmission rate of the uplink user data. Accordingly, there is a problem that the use efficiency of radio resources may be reduced.

Accordingly, the present invention has been made in view of the above problems, and when the serving cell of the mobile station UE is not transmitting the relative transmission rate control channel E-RGCH, the relative transmission rate control channel by the mobile station UE is provided. It is an object of the present invention to provide a transmission rate control method, a mobile station, a radio base station, and a radio network control station that can prevent false detection of (E-RGCH) and realize more efficient radio resource allocation.

A first aspect of the invention is an uplink user based on an absolute transmission rate of uplink user data transmitted via an absolute transmission rate control channel and a relative transmission rate of uplink user data transmitted via a relative transmission rate control channel. In a wireless communication system capable of controlling a transmission speed of data, a transmission speed control method in which a mobile station controls a transmission speed of uplink user data, wherein the mobile network establishes a wireless network when the mobile station establishes a data connection for transmitting uplink user data. The control station notifying the mobile station of the information identifying the absolute transmission rate control channel transmitted by the serving cell, without notifying the mobile station of the information identifying the relative transmission rate control channel transmitted by the serving cell; And the absolute transmission rate of the uplink user data transmitted from the serving cell via the absolute transmission rate control channel without considering the relative transmission rate of the uplink user data, regardless of whether the relative transmission rate control channel is transmitted or not. And a step of controlling the transmission rate of the uplink user data based on the above.

In a first aspect of the present invention, a transmission rate control method includes a relative transmission rate for a radio base station at which a radio network control station controls a serving cell when the mobile station establishes a data connection for transmitting uplink user data. Notifying the information identifying the absolute transmission rate control channel transmitted by the serving cell without notifying the information identifying the control channel; And the serving cell transmitting the absolute transmission rate control channel to the mobile station without transmitting the relative transmission rate control channel.

A second aspect of the invention is an uplink user based on an absolute transmission rate of uplink user data transmitted via an absolute transmission rate control channel and a relative transmission rate of uplink user data transmitted via a relative transmission rate control channel. In a wireless communication system capable of controlling the transmission speed of data, as a mobile station controlling the transmission speed of uplink user data, when the mobile station establishes a data connection for transmitting uplink user data, the mobile station controls the mobile station. If the information identifying the relative transmission rate control channel transmitted by the serving cell of the terminal is not notified and the information identifying the absolute transmission rate control channel transmitted by the serving cell is notified, the mobile station determines that the relative transmission rate control channel is Whether or not transmitted, the relative transmission rate of uplink user data Without having to take, based on the absolute transmission rate of uplink user data transmitted from the serving cell for the mobile station via the absolute transmission rate control channel, and is configured to control a transmission rate of uplink user data to a base.

A third aspect of the invention is that a mobile station may be based on an absolute transmission rate of uplink user data transmitted via an absolute transmission rate control channel and a relative transmission rate of uplink user data transmitted via a relative transmission rate control channel. A wireless base station used in a wireless communication system capable of controlling the transmission speed of link user data, wherein when a mobile station establishes a data connection for transmitting uplink user data, information identifying a relative speed control channel is not informed, When the information identifying the absolute transmission rate control channel transmitted by the serving cell of the mobile station controlled by the radio base station is notified, the serving cell does not transmit the relative transmission rate control channel to the mobile station, and the absolute transmission rate control is performed. The subject matter is that the channel is configured to transmit.

A fourth aspect of the invention is that a mobile station may be based on an absolute transmission rate of uplink user data transmitted via an absolute transmission rate control channel and a relative transmission rate of uplink user data transmitted via a relative transmission rate control channel. A wireless network control station used in a wireless communication system capable of controlling the transmission speed of link user data, wherein when a mobile station establishes a data connection for transmitting uplink user data, a relative transmission speed control channel is identified for the mobile station. It is to be noted that the information is configured to notify the information identifying the absolute transmission rate control channel transmitted by the serving cell of the mobile station, without notifying the information.

In a fourth aspect of the present invention, the radio network controller is configured to, when the mobile station establishes a data connection for transmitting uplink user data, information for identifying a relative transmission rate control channel to the radio base station controlling the serving cell. It may be configured to notify the information identifying the absolute transmission rate control channel transmitted by the serving cell, without notifying.

(The best mode for carrying out the invention)

(Configuration of Mobile Communication System According to First Embodiment of the Present Invention)

4 to 16, the configuration of the mobile communication system according to the first embodiment of the present invention will be described.

The mobile communication system according to the present embodiment is designed for the purpose of improving communication performance such as communication capacity and communication quality. The mobile communication system according to the present embodiment is applicable to "W-CDMA" and "CDMA2000" which are third generation mobile communication systems.

In the example of FIG. 4, cell # 3 controlled by radio base station Node B # 1 is a serving cell that primarily controls the transmission rate of uplink user data transmitted by the mobile station UE. The cell # 4 controlled by the radio base station Node B # 2 is not only a serving cell but also a non-serving cell in which a radio link is established with a mobile station UE.

In this case, cell # 3 (serving cell of mobile station UE) is configured to transmit an E-AGCH (Enhanced Absolute Grant Channel) to the mobile station UE. The UE is configured to transmit an Enhanced Dedicated Physical Control Channel (E-DPCCH) and an Enhanced Dedicated Physical Data Channel (E-DPDCH) for cell # 3 (a serving cell of a mobile station (UE)).

However, in the mobile communication system according to the present embodiment, when the mobile station UE establishes a data connection (dedicated channel (DCH), E-DPDCH] for transmitting uplink user data, the radio network control station (RNC) Does not inform the mobile station UE of the information identifying the E-RGCH transmitted by cell # 3 (serving cell of mobile station UE), but does not notify cell # 3 (serving cell of mobile station UE). When notifying information for identifying the E-AGCH to be transmitted, cell # 3 (serving cell of the mobile station UE) is configured not to transmit the E-RGCH to the mobile station UE.

On the other hand, in this case, cell # 4 (non-serving cell of mobile station UE) is configured to transmit the E-RGCH to the mobile station UE.

5 shows an example of a general configuration of a mobile station UE according to the present embodiment.

As shown in FIG. 5, the mobile station UE includes a bus interface 11, a call processing control unit 12, a baseband signal processing unit 13, a transmission / reception unit 14, and a transmission / reception antenna 15. . The mobile station UE may be configured to include an amplifier (not shown in FIG. 5).

However, these configurations do not necessarily need to exist independently as hardware. That is, each structure may be integrated partially or entirely, or may be comprised by the process of software.

6 shows a functional block of the baseband signal processing unit 13.

As shown in FIG. 6, the baseband signal processing unit 13 includes a higher layer function unit 131, an RLC function unit 132, a MAC-d function unit 133, a MAC-e function unit 134, and a layer. -1 functional part 135 is provided.

The RLC functional unit 132 is configured to function as an RLC lower layer. The layer-1 functional unit 135 is configured to function as layer-1.

As shown in FIG. 7, the RLC function unit 132 divides the application data (RLC SDU) received from the higher layer function unit 131 into a predetermined PDU size and uses the same for order control processing, retransmission processing, or the like. The RLC header is configured to generate an RLC PDU and deliver it to the MAC-d function unit 133.

Here, a pipeline that functions as a bridge element between the RLC function 132 and the MAC-d function 133 is referred to as a "logical channel". These logical channels are classified according to the contents of the data to be transmitted and received, and when communicating, it is possible to set a plurality of logical channels for one connection. That is, a plurality of data having various contents (for example, control data and user data, etc.) can be transmitted and received logically in parallel.

The MAC-d function unit 133 multiplexes logical channels, and generates a MAC-d PDU by assigning a MAC-d header accompanying such multiplexing of logical channels. The plurality of MAC-d PDUs are transmitted from the MAC-d functional unit 133 to the MAC-e functional unit 134 in the flow of MAC-d.

The MAC-e function unit 134 arranges a plurality of MAC-d PDUs transmitted from the MAC-d function unit 133 as the flow of MAC-d, and assigns a MAC-e header to the summarized MAC-d PDUs. By assigning, a transport block is generated, and the generated transport block is transmitted to the layer-1 functional unit 135 through a transport channel.

In addition, the MAC-e function unit 134 functions as a lower layer of the MAC-d function unit 133 to perform a retransmission control function and a transmission rate control function by a hybrid ARQ (HARQ).

Specifically, as shown in FIG. 8, the MAC-e functional unit 134 includes a multiplexer 134a, an E-TFC selector 134b, and a HARQ processor 134c.

The multiplexer 134a receives the up-stream received from the MAC-d function unit 133 in the flow of MAC-d based on the Enhanced-Transport Format Indicator (E-TFI) notified from the E-TFC selector 134b. The link user data is configured to perform multiplexing processing, generate uplink user data (transport block) to be transmitted through a transport channel (E-DCH), and transmit the same to the HARQ processing unit 134c.

Hereinafter, the "uplink user data received in the flow of MAC-d" is referred to as "uplink user data (flow of the MAC-d)", and the uplink user data to be transmitted through the "transport channel (E-DCH)". "Uplink user data (E-DCH)".

The E-TFI is an identifier of a transport format corresponding to a format for supplying a transport block for each TTI in a transport channel (E-DCH) and is provided in a MAC-e header.

The multiplexer 134a determines the transmission data block size to be applied to the uplink user data based on the E-TFI notified from the E-TFC selector 134b, and transmits the determined transmission data block size to the HARQ processing unit 134c. ) Is notified.

When the multiplexer 134a receives the uplink user data from the MAC-d function unit 133 in the flow of the MAC-d, the multiplexer 134a selects the transport format for the received uplink user data. It is configured to notify the E-TFC selection unit 134b of -TFC selection information.

Such E-TFC selection information includes data size, priority level, and the like of uplink user data.

The HARQ processing unit 134c performs ACK / NACK (acknowledge response / negative response) of the uplink user data notified from the layer-1 functional unit 135 by the "N-channel stop and weight (N-SAW) protocol". Is configured to perform retransmission control processing on " uplink user data (E-DCH) ". In this regard, Fig. 9 shows an example of the operation of the four-channel stop and weight protocol.

In addition, the HARQ processing unit 134c stores the " uplink user data (E-DCH) " received from the multiplexing unit 134a and HARQ information (for example, retransmission number, etc.) used for HARQ processing, layer-1. It is configured to transmit to the functional unit 135.

The E-TFC selector 134b is configured to determine the transmission rate of the uplink user data by selecting a transport format (E-TF) applied to the "uplink user data (E-DCH)".

Specifically, the E-TFC selector 134b should execute or transmit the uplink user data based on the scheduling information, the data amount of the MAC-d PDU, the hardware resource state of the radio base station Node B, or the like. It is configured to determine whether to stop.

Scheduling information (e.g., absolute transmission rate and relative transmission rate of uplink user data) is received from the radio base station Node B, and the data amount of MAC-d PDU (data size of uplink user data) is MAC-. d delivered from the function unit 133, the hardware resource state of the radio base station (Node B) is controlled by the MAC-e function unit 134.

The E-TFC selector 134b selects a transport format (E-TF) applied to the transmission of uplink user data, and selects the E-TFI for identifying the selected transport format. And the multiplexer 134a.

For example, the E-TFC selector 134b associates and stores the transmission rate of the uplink user data with the transport format, and based on the scheduling information from the layer-1 functional unit 135, the uplink user data. It is configured to update the transmission rate of and notify the layer-1 functional unit 135 and the multiplexer 134a of the E-TFI for identifying a transport format related to the transmission rate of the updated uplink user data.

Here, when the E-TFC selector 134b receives the absolute transmission rate of the uplink user data from the serving cell of the mobile station as scheduling information through the E-AGCH, the E-TFC selector 134b receives the transmission rate of the uplink user data. And change to an absolute transmission rate of the received uplink user data.

In addition, the E-TFC selector 134b uses the E-RGCH as scheduling information to determine the relative transmission rate (down command or Don't) of uplink user data from the non-serving cell of the mobile station. command), the transmission rate of the uplink user data at that time is increased or decreased by a predetermined rate based on the relative transmission rate of the uplink user data.

In the present specification, the transmission rate of uplink user data may be a speed at which uplink user data can be transmitted through the E-DPDCH, or may be a transmission data block size (TBS) for transmitting uplink user data. The transmission power may be a transmission power of an E-DPDCH (Enhanced Dedicated Physical Data Channel) or a transmission power ratio (transmission power offset) of an E-DPDCH and a dedicated physical control channel (DPCCH).

As shown in Fig. 10, the layer-1 functional unit 135 includes a transport channel encoder 135a, a physical channel mapping unit 135b, an E-DPDCH transmitter 135c, an E-DPCCH transmitter 135d, and an E. -HICH receiver 135e, E-RGCH receiver 135f, E-AGCH receiver 135g, physical channel demapping unit 135h, PRACH transmitter 135i, S-CCPCH receiver 135j, and DPCH receiver ( 135k).

As shown in FIG. 11, the transmission channel coding unit 135a includes a forward error correction (FEC) coding unit 135a1 and a transmission rate matching unit 135a2.

As shown in FIG. 11, the FEC encoder 135a1 performs an error correction encoding process on the " uplink user data (E-DCH) " transmitted from the MAC-e function unit 134, that is, the transport block. It is configured to perform.

In addition, as shown in Fig. 11, the transmission rate matching unit 135a2 performs a " repetition (bit) of the transport block to which the error correction encoding process is performed to match the transmission capacity of the physical channel. Repetition) "or" puncture (bit out) ".

The physical channel mapping unit 135b maps "uplink user data (E-DCH)" from the transmission channel encoding unit 135a to the E-DPDCH, and the E-TFI from the transmission channel encoding unit 135a and It is configured to map HARQ information to the E-DPCCH.

The E-DPDCH transmitter 135c is configured to perform a transmission process for the E-DPDCH.

The E-DPCCH transmitter 135d is configured to perform transmission processing for the E-DPCCH.

The PRACH transmission unit 135i performs transmission processing for a Physical Random Access Channel (PRACH) that transmits an outgoing request requesting to establish a data connection (DCH, E-DPDCH) for transmitting uplink user data to a mobile station (UE). It is configured to perform.

In addition, the PRACH transmitter 135i performs a transmission process for the PRACH that transmits a control connection establishment response notifying that a dedicated control channel (DCCH) for transmitting control information to the mobile station UE is established. It is configured to.

The E-HICH receiver 135e is configured to receive an E-HCH (E-DCH HARQ Acknowledgment Indicator Channel) transmitted from a radio base station Node B.

The E-RGCH receiver 135f is configured to receive the E-RGCH transmitted from the radio base station Node B (serving cell and non-serving cell of the mobile station UE).

The E-AGCH receiver 135g is configured to receive an E-AGCH transmitted from a radio base station Node B (a serving cell of a mobile station UE).

However, when the mobile station UE establishes data connection (DCH, E-DPDCH) for transmitting uplink user data, the E-RGCH receiving unit 135f uses the serving cell from the radio network control station (RNC). When information (channelization code or sequential pattern, etc.) identifying the transmitted E-RGCH is not notified, and information (channelization code or sequential pattern, etc.) identifying the E-AGCH transmitted by the serving cell is notified, It may be configured not to perform the reception process for the E-RGCH transmitted from the serving cell.

The S-CCPCH receiver 135j is configured to receive a "Secondary Common Control Physical Channel (S-CCPCH)" transmitted from the radio base station Node B.

The DPCH receiver 135k is configured to receive a DPCH transmitted from a radio base station Node B.

The physical channel demapping unit 135h extracts ACK / NACK for uplink user data included in the E-HICH transmitted from the E-HICH receiving unit 135e and transmits the ACK / NACK to the MAC-e functional unit 134. Consists of.

In addition, the physical channel demapping unit 135h may include scheduling information (relative transmission rate of uplink user data, that is, an increase (UP) command / decrease (DOWN) included in the E-RGCH transmitted from the E-RGCH receiving unit 135f. Command), and transmits it to the MAC-e function unit 134.

In addition, the physical channel demapping unit 135h extracts scheduling information (absolute transmission rate of uplink user data) included in the E-AGCH transmitted from the E-AGCH receiving unit 135g, and extracts the MAC-e functional unit ( 134).

12 shows an example of the configuration of a functional block of a radio base station Node B according to the present embodiment.

As shown in FIG. 12, the radio base station Node B according to the present embodiment includes an HWY interface 21, a baseband signal processor 22, a transceiver 23, an amplifier 24, a transceiver 24. ) And a call processing control unit 26.

The HWY interface 21 is configured to receive downlink user data to be transmitted from a radio network control station (RNC) located above the radio base station Node B and provide it to the baseband signal processor 22. .

In addition, the HWY interface 21 is configured to transmit the uplink user data provided from the baseband signal processing unit 22 to the radio network control station (RNC).

The baseband signal processing unit 22 performs layer-1 processing such as channel encoding processing or spreading processing on the downlink user data provided from the HWY interface 21, and then the baseband including such downlink user data. It is configured to transmit a signal to the transceiver 23.

In addition, the baseband signal processing unit 22 performs layer-1 processing such as despreading, RAKE synthesis processing, error correction decoding processing, and the like on the baseband signal provided from the transmission / reception unit 23. Configured to transmit the acquired uplink user data to the HWY interface 21.

The transceiver 23 is configured to convert the baseband signal provided from the baseband signal processing unit 22 into a radio frequency band signal.

The transceiver 23 is configured to convert a radio frequency band signal provided from the amplifier 24 into a baseband signal.

The amplifier 24 is configured to amplify the radio frequency band signal provided from the transceiver 23 and transmit it to the mobile station UE via the transceiver antenna 25.

The amplifier 24 is configured to amplify a signal received by the transmission / reception antenna 25 and transmit the signal to the transmission / reception section 23.

The call processing control unit 26 transmits and receives a call processing control signal to and from the radio network control station RNC, and controls the state of each functional unit of the radio base station Node B and hardware resources by layer-3. Configured to perform processing such as allocation.

13 is a functional block diagram of the baseband signal processing unit 22.

As shown in FIG. 13, the baseband signal processing unit 22 includes a layer-1 functional unit 221 and a MAC-e functional unit 222.

As shown in Fig. 14, the layer-1 functional unit 221 includes an E-DPCCH despreading-lake (RAKE) synthesis unit 221a, an E-DPCCH decoder 221b, and an E-DPDCH despreading-lake ( RAKE) Synthesizing Unit 221c, Buffer 221d, Re-Despreading Unit 221e, HARQ Buffer 221f, Error Correction Decoding Unit 221g, Transport Channel Coding Unit 221h, Physical Channel Mapping Unit 221i ), E-HICH transmitter 221j, E-AGCH transmitter 221k, E-RGCH transmitter 221l, PRACH despread-lake synthesizer 221m, PRACH decoder 221n, S-CCPCH The transmitter 221o and the DPCH transmitter 221p are provided.

And these configurations do not necessarily need to exist independently as hardware. That is, each structure may be integrated partially or entirely, or may be comprised by the software process.

The E-DPCCH despreading-rake section 221a is configured to perform despreading and RAKE synthesis processing on the E-DPCCH.

The E-DPCCH decoding unit 221b uses the E-TFCI for determining the transmission rate of the uplink user data based on the output from the E-DPCCH despreading-rake unit 221a (or E-DPCCH). TFRI: Enhanced Transport Format and Resource Indicator] is decoded and transmitted to the MAC-e function unit 222.

The E-DPDCH despreading-lake synthesis unit 221c uses the number of multi-codes and the spreading rate (minimum spreading rate) corresponding to the highest rate that the E-DPDCH can use for the E-DPDCH. The diffusion process is performed, and the despread process data is stored in the buffer 221d. By performing the despreading process using such a spreading rate and the number of multi-codes, it is possible to secure resources so that uplink data can be received up to the highest rate (bit rate) available to the radio base station Node B.

The re-despreading unit 221e performs the re-despreading process on the data stored in the buffer 221d, using the spreading rate and the number of multi-codes notified from the MAC-e function unit 222. And re-spread this data in HARQ buffer 221f.

The error correction decoding unit 221g acquires the " uplink user data obtained by performing an error correction decoding process on the data stored in the buffer 221d based on the coding rate notified from the MAC-e function unit 222. (E-DCH) "to the MAC-e function unit 222. The &quot; E-DCH &quot;

The PRACH despreading-lake synthesis unit 221m is configured to perform despreading processing and RAKE synthesis processing on the PRACH.

Also, the PRACH decoding unit 221n decodes the transmission request or control connection establishment response transmitted from the mobile station UE on the basis of the output from the PRACH despreading-lake synthesis unit 221m. And to the MAC-e function unit 222 via a Random Access Channel.

The transport channel encoder 221h is configured to perform necessary encoding processing on the ACK / NACK and scheduling information for uplink user data received from the MAC-e function unit 222.

The physical channel mapping unit 221i maps ACK / NACK for uplink user data from the transmission channel coding unit 221h to the E-HICH, and scheduling information (absolute transmission rate) from the transmission channel coding unit 221h. ) Is mapped to the E-AGCH, and the scheduling information (relative transmission rate) from the transmission channel encoder 221h is mapped to the E-RGCH.

In addition, the physical channel mapping unit 221i is configured to map a control connection establishment request to the S-CCPCH requesting the establishment of a control connection for transmitting control information to the mobile station UE.

In addition, the physical channel mapping unit 221i transmits information (eg, channelization code or sequential pattern) identifying the E-AGCH to be transmitted to the mobile station (UE) and the E-RGCH to be transmitted to the mobile station (UE). The identification information (channelization code, sequential pattern, etc.) is configured to be mapped to DPCH (DPCCH or DPDCH).

The physical channel mapping unit 221i in the serving cell of the mobile station UE identifies the E-RGCH to be transmitted to the mobile station UE according to an instruction from the radio network controller RNC. Is not mapped to DPCH (DPCCH or DPDCH).

The E-HICH transmitter 221j is configured to perform a transmission process for the E-HICH.

The E-AGCH transmitter 221k is configured to perform a transmission process for the E-AGCH.

The E-RGCH transmitter 221l is configured to perform transmission processing for the E-RGCH.

The S-CCPCH transmitter 221o is configured to perform a transmission process for the S-CCPCH.

The DPCH transmitter 221p is configured to perform a transmission process for the DPCH.

As shown in FIG. 15, the MAC-e functional unit 222 includes a HARQ processing unit 222a, a reception processing command unit 222b, a scheduling unit 222c, and a demultiplexer 222d.

The HARQ processing unit 222a is configured to receive the uplink user data and the HARQ information received from the layer-1 functional unit 221 and perform HARQ processing on the "uplink user data (E-DCH)". .

Further, the HARQ processing unit 222a is configured to notify the layer-1 functional unit 221 of an ACK / NACK (for uplink user data) indicating a result of receiving processing for "uplink user data (E-DCH)". It is.

The HARQ processing unit 222a is configured to notify the scheduling unit 222c of ACK / NACK (for uplink user data) for each process.

The reception processing command unit 222b relates to the transport format of each mobile station (UE) identified by the E-TFCI for each TTI received from the E-DPCCH decoding unit 221b of the layer-1 functional unit 221. The spreading rate and the number of multi-codes are notified to the re-despreading section 221e and the HARQ buffer 221f, and to the error correction decoding section 221g.

The scheduling unit 222c is an E-TFCI for each TTI received from the E-DPCCH decoder 221b of the layer-1 functional unit 221, an ACK / NACK for each process received from the HARQ processing unit 222a, or And configured to change the absolute transmission rate or the relative transmission rate of the uplink user data based on the interference level or the like.

The scheduling unit 222c is configured to notify the layer-1 functional unit 221 of the absolute transmission rate or the relative transmission rate of such uplink user data as scheduling information.

The demultiplexer 222d is configured to transmit the uplink user data obtained by performing demultiplexing processing on the "uplink user data (E-DCH)" received from the HARQ processing unit 222a to the HWY interface 21. It is.

Further, the demultiplexer 222d receives the result obtained by performing demultiplexing processing on the origination request (RACH) and the control connection establishment response (E-DPDCH) received from the layer-1 functional unit 221, and the HWY interface. It is configured to transmit to 21.

The radio network control station RNC according to the present embodiment is a device located above the radio base station Node B, and is configured to control radio communication between the radio base station Node B and the mobile station UE.

As shown in Fig. 16, the radio network control station (RNC) according to the present embodiment includes an exchange station interface 31, an LLC (Logical Link Control) layer function unit 32, and a MAC layer function unit 33. ), A media signal processor 34, a wireless base station interface 35, and a call processing controller 36.

The switching center interface 31 is an interface with the switching center 1, and transmits the downlink signal transmitted from the switching station 1 to the LLC layer function unit 32, and the uplink transmitted from the LLC layer function unit 32. It is configured to transmit a signal to the switching center 1.

The LLC layer functional unit 32 is configured to perform LLC lower layer processing, such as composition processing of a header or trailer, such as a sequential pattern number.

The LLC layer functional unit 32 is configured to transmit the uplink signal to the switching center interface 31 and the downlink signal to the MAC layer functional unit 33 after performing the LLC lower layer processing.

The MAC layer function unit 33 is configured to first perform MAC layer processing such as control processing or header granting processing.

After performing MAC layer processing, the MAC layer function unit 33 transmits an uplink signal to the LLC layer function unit 32, and transmits the downlink signal to the radio base station interface 35 (or the media signal processor 34). )].

The media signal processing unit 34 is configured to perform media signal processing on an audio signal or a real time image signal.

The media signal processing unit 34 is configured to transmit the uplink signal to the MAC layer function unit 33 and the downlink signal to the radio base station interface 35 after performing the media signal processing.

The radio base station interface 35 is an interface with a radio base station Node B. The radio base station interface 35 transmits the uplink signal transmitted from the radio base station Node B to the MAC layer function unit 33 (or the media signal processing unit 34), and the MAC layer function unit 33 [ Or a downlink signal transmitted from the media signal processor 34 to the radio base station Node B.

The call processing control section 36 is configured to perform radio resource control processing, channel setting and release processing by layer-3 signaling, and the like. Here, the radio resource control includes call permission control, handover control, and the like.

In addition, the call processing control unit 36 sets the data connection (DCH, E-DPDCH) for the mobile station UE to transmit uplink user data, and the E transmitted by the serving cell to the mobile station UE. It is configured to notify the information identifying the E-AGCH transmitted by the serving cell without notifying the information identifying the -RGCH.

(Operation of Mobile Communication System According to First Embodiment of the Present Invention)

The operation of the mobile communication system according to the present embodiment will be described below with reference to FIG. 17. Specifically, the operation of controlling the transmission rate of uplink user data in the mobile communication system according to the present embodiment will be described.

As shown in Fig. 17, in step S1001, the mobile station UE uses PRACH (RACH) to set the data connection CHDC, E-DPDCH) for the mobile station UE to transmit uplink user data. Send the requested origination request.

In step S1002, the radio network controller RNC establishes a data connection for the mobile station UE for the radio base station Node B that controls the serving cell of the mobile station UE based on the received origination request. Sends a connection establishment request to request.

In step S1003, when it is determined that the radio base station Node B can establish a data connection between the mobile station UE and the radio base station Node B, the radio base station Node B sends a connection establishment response to the radio network control station ( RNC).

In step S1004, the radio network controller RNC uses the S-CCPCH (FACH) for the mobile station UE to identify control information (e.g., an E-AGCH) for the mobile station UE. Information, identifying information for identifying the E-RGCH, etc.) and sends a control connection establishment request requesting the establishment of the control connection (DCH, DPCH).

In step S1005, the mobile station UE transmits a control connection establishment response to the radio network control station RNC using the PRACH (RACH) to notify that the control connection has been established.

In step S1006, via such a control connection, a data connection for transmitting uplink user data is established.

Here, the radio network controller RNC does not notify the mobile station UE and the radio base station Node B information to identify the E-RGCH transmitted by the serving cell, but is transmitted by the serving cell. Notify the information identifying the AGCH.

In step S1007, the serving cell controlled by the radio base station Node B does not transmit the E-RGCH to the mobile station UE, but transmits only the E-AGCH.

In step S1008, the mobile station UE transmits the absolute transmission rate of the uplink user data transmitted by the serving cell of the mobile station UE controlled by the radio base station Node B, and the non-serving cell (shown in FIG. 17). Control the transmission rate of the uplink user data based on the relative transmission rate of the uplink user data.

As mentioned above, although an Example demonstrated this invention in detail, it is clear for those skilled in the art that this invention is not limited to the Example demonstrated in this specification. The apparatus of the present invention can be implemented as modifications and variations without departing from the spirit and scope of the invention as defined by the description of the claims. Accordingly, the description herein is for the purpose of illustration and has no limiting meaning to the invention.

According to the mobile communication system according to the present embodiment, when the serving cell of the mobile station UE is not transmitting the E-RGCH, the mobile station UE is informed of identifying the E-RGCH from the radio network control station RNC. Is not notified, so no E-RGCH is detected. As a result, erroneous detection of the E-RGCH by the mobile station UE can be prevented, and more efficient allocation of radio resources can be realized.

In addition, according to the mobile communication system according to the present embodiment, since the transmission of the E-AGCH and / or the E-RGCH for correcting the false detection of the E-RGCH by the mobile station UE is unnecessary, The load can be reduced.

Claims (6)

Based on the absolute transmission rate of the uplink user data transmitted through the absolute transmission rate control channel and the relative transmission rate of the uplink user data transmitted through the relative transmission rate control channel, the transmission rate of the uplink user data can be controlled. In a wireless communication system, a transmission rate control method in which a mobile station controls the transmission rate of the uplink user data, When the mobile station establishes a data connection for transmitting the uplink user data, the radio network controller informs the mobile station of the information identifying the absolute rate control channel transmitted from the serving cell and transmits the relative transmission. Not notifying information identifying the speed control channel; And The uplink transmitted by the mobile station from the serving cell on the absolute rate control channel without considering the relative rate of transmission of the uplink user data, regardless of whether the relative rate control channel is transmitted or not; Controlling the transmission rate of the uplink user data based on the absolute transmission rate of user data Transmission rate control method comprising a. The method of claim 1, When the mobile station establishes a data connection for transmitting the uplink user data, the wireless network control station establishes the absolute transmission rate control channel transmitted by the serving cell to a wireless base station controlling the serving cell. Notifying the identifying information but not the identifying information of the relative transmission rate control channel; And The serving cell transmitting the absolute transmission rate control channel without transmitting the relative transmission rate control channel to the mobile station. Transmission rate control method further comprising. Based on the absolute transmission rate of the uplink user data transmitted through the absolute transmission rate control channel and the relative transmission rate of the uplink user data transmitted through the relative transmission rate control channel, the transmission rate of the uplink user data can be controlled. In a wireless communication system, a mobile station for controlling the transmission rate of the uplink user data, When the mobile station establishes a data connection for transmitting the uplink user data, information from the radio network controller identifying the absolute rate control channel transmitted by the serving cell is notified and indicates the relative rate control channel. If the identifying information is not informed, regardless of whether the relative transmission rate control channel is transmitted, the absolute transmission rate control channel is removed from the serving cell of the mobile station without considering the relative transmission rate of the uplink user data. A mobile station configured to control a transmission rate of the uplink user data based on the absolute transmission rate of the uplink user data transmitted via the transmission. The mobile station controls the transmission rate of the uplink user data based on the absolute transmission rate of the uplink user data transmitted through the absolute transmission rate control channel and the relative transmission rate of the uplink user data transmitted through the relative transmission rate control channel. A wireless base station used in a wireless communication system capable of When the mobile station establishes a data connection for transmitting the uplink user data, information identifying the absolute rate control channel transmitted by the serving cell of the mobile station controlled by the wireless base station is informed and the relative rate And when the information identifying the control channel is not notified, the serving cell is configured to transmit the absolute transmission rate control channel to the mobile station without transmitting the relative transmission rate control channel. The mobile station controls the transmission rate of the uplink user data based on the absolute transmission rate of the uplink user data transmitted through the absolute transmission rate control channel and the relative transmission rate of the uplink user data transmitted through the relative transmission rate control channel. A wireless network control station used in a wireless communication system capable of When the mobile station establishes a data connection for transmitting the uplink user data, the mobile station is informed of the information identifying the absolute rate control channel transmitted by the serving cell of the mobile station, and the relative transmission rate. A wireless network control station, configured to not notify of information identifying the control channel. The method of claim 5, When the mobile station establishes a data connection for transmitting the uplink user data, informs the wireless base station controlling the serving cell of information identifying the absolute rate control channel transmitted by the serving cell, And notifying the information identifying the relative transmission rate control channel.

Images