KR100744061B1 - Transmission rate control method, and radio network controller - Google Patents

Abstract

The present invention relates to a transmission rate control method for transmitting uplink user data transmitted through an Enhanced Dedicated Physical Data Channel (E-DPDCH), wherein the wireless network control station is configured for a first cell only. Determining that the mobile station transmitting the E-DPDCH transmits the E-DPDCH for the first cell and the second cell; The radio network control station notifying the mobile station of the E-RGCH decoding information for decoding the E-RGCH of the uplink user data to be transmitted by the second cell based on this determination; Transmitting, by the mobile station, the E-DPDCH for the first cell and the second cell after receiving the E-RGCH; And based on the E-RGCH decoding information, the mobile station decodes the E-RGCH of the uplink user data to be transmitted from the second cell, and at a relative transmission rate for the uplink user data notified by the decoded E-RGCH. Based on the transmission rate of the uplink user data.

Enhanced dedicated physical data channel, relative transmission rate, mobile station, radio base station, radio network control station, uplink user data

Description

Transmission rate control method and wireless network control station {TRANSMISSION RATE CONTROL METHOD, AND RADIO NETWORK CONTROLLER}

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

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

3 is a view for explaining a transmission rate control method in a conventional mobile communication system.

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

5 is a functional block diagram of a 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.

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

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

Fig. 10 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.

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

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

13 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.

14 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. 15 is a functional block diagram of a radio network control station in the mobile communication system according to the first embodiment of the present invention.

16 is a flowchart 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 station, 11: bus interface, 12: call processing control unit, 15: transmit / receive antenna, 14, 23: transceiver unit, 13: baseband signal processor 26, 36: call processing control unit, 21: HWY interface, 22: baseband signal processing unit, 24: amplifying unit, 25: transmit and receive antenna, 31: switching center interface, 32: LLC layer function unit, 33: MAC layer function unit, 34: media signal processing unit, 35: radio base station interface, 131: upper 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 unit, 135a: transport channel encoder, 135b: physical channel mapping unit, 135c: DPDCH transmitter, 135d: E-DPDCH transmitter, 135e: E-DPCCH transmitter, 135f: E-HICH receiver, 135g: E-RGCH receiver, 135h: E-AGCH receiver, 135i: DPCH receiver, 135j: physical channel demapping, 221: layer-1 functional, 221a: DPDCH Diffuse-Rake Synthesizer, 221b: DPDCH Decoder, 221c: E-DPCCH Despread-Rake Synthesis, 221d: E-DPCCH Decoder, 221e: E-DPDCH Despread-Rake Synthesizer, 221f: buffer, 221g: re-despreader, 221h: HARQ buffer, 221i: error correction decoder, 221j: transport channel encoder, 221k: physical channel mapping, 221l: E-HICH transmitter, 221m: E-AGCH transmitter, 221n: E-RGCH transmitter, 221o: DPCH transmitter, 222: MAC-e function unit, 222a: HARQ processing unit, 222b: reception processing command unit, 222c: scheduling unit, 222d: demultiplexer

The present invention relates to a transmission rate control method and a wireless network control station for controlling a transmission rate of uplink user data from an mobile station through an enhanced dedicated physical data channel.

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 connected to the radio base station Node B. Receiving hardware resources (hereinafter referred to as " hardware resources "), radio resources in 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 required transmission rate and the like, the transmission rate of the uplink user data is determined, and the determined transmission rate of the uplink user data is determined by the layer-3 (for the mobile station UE and the radio base station Node B). And a notification as a message of a Radio Resource Control layer).

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 occurs in bursts as compared with voice communication or TV communication, it is preferable to change the transmission speed of a channel used for data communication at a high speed.

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

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).

Referring to Fig. 3, the function of soft-handover (hereinafter referred to as "SHO") in the "enhanced uplink" will be described.

In step S2001, the mobile station UE establishes a connection of the data E-DPDCH for transmitting uplink user data to the radio network control station RNC via cell # 10.

In such a case, cell # 10 uses a relative Relative Grant Channel (E-RGCH) for the mobile station UE, using a relative transmission rate (e.g., an Up command / Down command / Doncare). Don't care)] is configured to control the transmission rate of the uplink user data of the mobile station UE.

In step S2002, when the received power of the common pilot signal received from the cell # 20 becomes equal to or greater than a predetermined value, the mobile station UE transmits a measurement report to the radio network control station RNC.

In step S2003, the radio network controller RNC requests the cell # 20 to establish synchronization of the uplink radio link with the mobile station UE, based on the received measurement report.

Specifically, in step S2003, the radio network controller RNC transmits a SHO setting request including the SHO parameter to the radio base station Node B # 2. For example, the SHO parameter includes a channelization code for identifying a channel configuration in the uplink radio link, a scramble code for identifying a mobile station (UE), and a start time of the SHO.

In step S2004, the cell # 20 transmits a SHO setting response indicating that the SHO setting request has been received.

In step S2005, the radio network controller RNC requests the mobile station UE to establish synchronization of the downlink radio link between the cell # 20 and the mobile station UE.

Specifically, in step S2005, the radio network controller RNC sends a SHO setting request including the SHO parameter to the mobile station UE.

In step S2006, a SHO setting response indicating that the mobile station UE has received a SHO setting request is transmitted.

The mobile station UE transitions from the non-SHO state to the SHO state based on the SHO parameter. In step S2007, the mobile station enters a soft handover (SHO) state with cell # 10 and cell # 20.

Thereby, the mobile station UE to which "enhanced uplink" is applied is connected to a plurality of cells simultaneously in the SHO state, and is configured to prevent interruption of communication.

Here, the set of radio links established between the mobile station UE and the radio base station Node B is referred to as the " active set " of the mobile station UE.

The active set is updated when the mobile station UE transitions between the non-SHO state and the SHO state, or when the cell in which the mobile station UE establishes the radio link is changed.

On the other hand, the transmission rate of the E-DPDCH is controlled based on the relative transmission rate transmitted from the mobile station UE via the E-RGCH.

However, in such a mobile communication system, even when the mobile station is updated based on the transition from the non-SHO state to the SHO state, the E-RGCH used in the newly connected radio base station Node B (cell) is selected. Information for decoding is not immediately notified to the mobile station UE.

Therefore, after the active set is updated, until the information for decoding the E-RGCH is notified to the mobile station (UE), the E-DPDCH of the E-DPDCH controlled by the relative transmission rate transmitted to the mobile station (UE) through the E-RGCH. The baud rate is not controlled.

That is, after the active set is updated, a time lag occurs until the transmission rate of the E-DPDCH is controlled, resulting in a waste of radio resources in the uplink radio link.

Accordingly, the present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a transmission rate control method and a radio network control station that can effectively use radio resources in an uplink radio link even when an active set is updated. The purpose.

This application is based on Japanese Patent Application No. P2005-274653 for which it applied on August 24, 2005, and claims that priority, and the whole content is taken in into this specification as a reference.

A first aspect of the present invention is a transmission rate control method for controlling a transmission rate of uplink user data transmitted through an enhanced dedicated physical data channel from a mobile station, the wireless network control station comprising: Determining that a mobile station transmitting an enhanced dedicated physical data channel only for a first cell transmits an enhanced dedicated physical data channel for a first cell and a second cell other than the first cell; The radio network control station notifying the mobile station of the relative transmission rate control channel decoding information for decoding the relative transmission rate control channel of the uplink user data to be transmitted by the second cell based on this determination; After the mobile station receives the relative transmission rate control channel, transmitting an enhanced dedicated physical data channel for the first cell and the second cell; And the mobile station decodes the relative transmission rate control channel of the uplink user data to be transmitted from the second cell based on the relative transmission rate control channel decoding information, and is informed by the decoded relative transmission rate control channel. And a step of controlling the transmission rate of the uplink user data based on the relative transmission rate for.

A second aspect of the present invention is a wireless network control station for use in a mobile communication system for controlling a transmission rate of uplink user data transmitted from an mobile station over an enhanced dedicated physical data channel. A determination unit for determining, by the mobile station that transmits the enhanced dedicated physical data channel only for the first cell, to transmit the enhanced dedicated physical data channel for the first cell and a second cell other than the first cell; And relative transmission rate control of uplink user data to be transmitted by the second cell based on the determination by the determining unit before the mobile station initiates transmission of the enhanced dedicated physical data channel to the first cell and the second cell. It is essential to include a notification unit for notifying the mobile station of relative transmission rate control channel decoding information for decoding a channel.

(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. Further, 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, a mobile station UE that receives a dedicated physical channel (hereinafter referred to as "DPCH") transmitted from cell # 3 controlled by the radio base station Node B # 1 receives the received DPCH. Based on the power, determine the increase / decrease of the transmission power of the DPCH at the wireless base station Node B # 1, and determine the result of the determined increase / decrease in a TPC command (e.g., Up / Down command). ] To transmit to the radio base station (Node B) # 1 controlling cell # 3.

The radio base station Node B # 1 controlling cell # 3 is configured to control the transmission power of the DPCH for transmission to the mobile station UE using the TPC command transmitted from the mobile station UE.

In addition, the mobile station UE controls the transmission rate of the uplink user data transmitted to the cell # 3 based on the relative transmission rate control channel (hereinafter referred to as "E-RGCH" (Enhanced Relative Grant Channel)). Consists of.

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 software process.

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 establish 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 logically transmitted and received 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.

In addition, when the multiplexer 134a receives uplink user data from the MAC-d function unit 133 in the flow of MAC-d, the multiplexer 134a selects an E for selecting a 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 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.

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

Further, the E-TFC selector 134b, via E-RGCH, provides, as scheduling information, the relative transmission rate of the uplink user data from the non-serving cell of the mobile station (down command or Don '). t care) command], the transmission speed of the uplink user data at that time is increased or decreased by a predetermined speed based on the relative transmission speed 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 via "E-DPDCH", and a transmission data block size (TBS) for transmitting uplink user data. It is also possible to set the transmission power of "E-DPDCH" or the transmission power ratio (transmission power offset) of "E-DPDCH" (Enhanced Dedicated Physical Data Channel) and "DPCCH" (Dedicated Physical Control Channel).

As shown in Fig. 9, the layer-1 functional unit 135 includes a transport channel encoder 135a, a physical channel mapping unit 135b, a DPDCH transmitter 135c, a DPCCH transmitter (not shown), and an E-DPDCH. A transmitter 135d, an E-DPCCH transmitter 135e, an E-HICH receiver 135f, an E-RGCH receiver 135g, an E-AGCH receiver 135h, a physical channel demapping unit 135j, and a DPCH receiver ( 135i).

As illustrated in FIG. 10, the transmission channel encoder 135a includes a forward error correction (FEC) encoder 135a1 and a transfer rate matching unit 135a2.

As shown in FIG. 10, 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. 10, 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 DPDCH transmitter 135c is configured to perform a transmission process for "Dedicated Physical Data Channel (DPDCH)" of uplink user data. The DPDCH is used to transmit uplink user data transmitted by the mobile station (UE).

Here, the uplink user data includes a measurement report that reports the transmit power of the common pilot channel transmitted from the cell.

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

The E-DPCCH transmitter 135e is configured to perform transmission processing of the E-DPCCH.

The E-HICH receiver 135f is configured to receive an E-HCH (E-DCH HARQ Acknowledgment Indicator Channel) transmitted from a cell (a serving cell and a non-serving cell for a mobile station (UE)).

The E-RGCH receiver 135g is configured to receive the E-RGCH transmitted from the cell (serving cell and non-serving cell of a mobile station (UE)).

The E-RGCH receiver 135g is configured to receive relative transmission rate control channel decoding information for decoding the relative transmission rate control channel for uplink user data.

The E-AGCH receiver 135h is configured to receive the E-AGCH transmitted from the cell (a serving cell of a mobile station (UE)).

The DPCH receiver 135i is configured to perform reception processing of the downlink dedicated physical channel (DPCH) transmitted from the cell.

Here, the dedicated physical channel (DPCH) includes a dedicated physical data channel (DPDCH) and a dedicated physical control channel (DPCCH).

The physical channel demapping unit 135j includes scheduling information (relative transmission rate of uplink user data, that is, an up command / down command) included in the E-RGCH transmitted from the E-RGCH receiving unit 135g. / Don't care command] is extracted and transmitted to the MAC-e function unit 134. FIG.

Specifically, the physical channel demapping unit 135j decodes the E-RGCH received by the E-RGCH receiving unit 135g, and transmits a relative transmission rate (i.e., uplink user data notified by the decoded E-RGCH). , Up command / Down command / Don't care command] are extracted, and the extracted relative transfer rate is transmitted to the MAC-e function unit 134.

In addition, the physical channel demapping unit 135j extracts scheduling information (absolute transmission rate of uplink user data) included in the E-AGCH received by the E-AGCH receiving unit 135h, and then the MAC-e function unit. 134 is configured to transmit.

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

As shown in FIG. 11, 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.

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

As shown in FIG. 12, the baseband signal processing unit 22 includes a layer-1 functional unit 221 and a MAC-e functional unit 222.

As shown in FIG. 13, the layer-1 functional unit 221 includes a DPDCH despreading-lake synthesis unit 221a, a DPDCH decoder 221b, and a DPCCH despreading-lake synthesis unit (shown in FIG. 13). DPCCH decoder (not shown), E-DPCCH despread-lake synthesis section 221c, E-DPCCH decoder 221d, E-DPDCH despread-lake synthesis section 221e, buffer 221f, re-despreading unit 221g, HARQ buffer 221h, error correction decoding unit 221i, transport channel coding unit 221j, physical channel mapping unit 221k, E- An HICH transmitter 221l, an E-AGCH transmitter 221m, an E-RGCH transmitter 221n, and a DPCH transmitter 221o 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 DPDCH despread-lake synthesis unit 221a is configured to perform despreading and RAKE synthesis processing on the DPDCH.

The DPDCH decoding unit 221b decodes the uplink user data transmitted from the mobile station UE on the basis of the output from the DPDCH despread-lake synthesis unit 221a, and the MAC-e function unit 222. It is configured to transmit to).

Here, the uplink user data includes a measurement report for reporting the received power of the common pilot signal transmitted from the mobile station UE.

The E-DPCCH despread-lake synthesis unit 221c is configured to perform despreading and RAKE synthesis processing on the E-DPCCH.

The E-DPCCH decoding unit 221d uses the E-TFCI (or E for determining the transmission rate of uplink user data based on the output from the E-DPCCH despreading-lake synthesis unit 221c). -TFRI: It is configured to decode the Enhanced Transport Format and Resource Indicator (TFRI) and transmit it to the MAC-e function unit 222.

The E-DPDCH despreading-lake synthesis unit 221e uses the number of multi-codes and the diffusion rate (minimum diffusion rate) corresponding to the highest rate that the E-DPDCH can take with respect to the E-DPDCH. The diffusion process is performed, and the despread process data is stored in the buffer 221f. By performing the despreading process using such a spreading rate and the number of multi-codes, the radio base station Node B allocates resources to receive uplink data up to the highest rate (bit rate) available to the mobile station UE. It can be secured.

The re-despreading unit 221g performs the re-spreading process on the data stored in the buffer 221f by using the spreading rate and the number of multi-codes notified from the MAC-e function unit 222, and HARQ It is configured to accumulate in the buffer 221h.

The error correction decoding unit 221i performs an error correction decoding process on the data stored in the HARQ buffer 221h based on the coding rate notified from the MAC-e function unit 222, thereby obtaining " Uplink user data (E-DCH) "

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

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

The E-AGCH transmitter 221m is configured to perform transmission processing for the E-AGCH.

In addition, the E-RGCH transmitter 221n is configured to perform a transmission process for the E-RGCH.

The DPCH transmitter 221o is configured to perform a transmission process for the downlink " Dedicated Physical Channel " (DPCH) transmitted from the radio base station Node B.

As shown in FIG. 14, 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)". .

In addition, the HARQ processing unit 222a notifies the layer-1 functional unit 221 of ACK / NACK (for uplink user data) indicating a result of receiving processing for "uplink user data (E-DCH)". Consists of.

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 is assigned to the transport format of each mobile station (UE) specified by the E-TFCI for each TTI received from the E-DPCCH decoding unit 221d of the layer-1 functional unit 221. The re-spreading section 221g and the HARQ buffer 221h are informed of the spreading rate and the number of multi-codes related, and the error correction decoding section 221i is notified of the coding rate.

The scheduling unit 222c is an E-TFCI for each TTI received from the E-DPCCH decoding unit 221d 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 the uplink user data as the scheduling information.

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

Such uplink user data includes a measurement report that reports the received power of the common pilot channel transmitted from the mobile station (UE).

The radio network control station RNC according to the present embodiment is a device located at a higher level of 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. 15, the radio network control station (RNC) according to the present embodiment includes an exchange station interface 31, an LLC layer function unit 32, a MAC layer function unit 33, a media signal processor 34, The radio base station interface 35 and the call processing control unit 36 are provided.

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.

The call processing control section 36 is also configured to determine that the mobile station UE transitions between the SHO state and the non-SHO state based on the above-described measurement report or the like.

Further, the call processing control section 36, based on the determination of the transition between the SHO state and the non-SHO state of the mobile station UE, the relative rate control channel for decoding the relative rate control channel of the uplink user data. The decoding information is configured to be transmitted to the mobile station UE.

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

Hereinafter, with reference to FIG. 16, the transmission power control method in the mobile communication system which concerns on this embodiment is demonstrated.

Specifically, the case where the mobile station UE transitions from the non-SHO state to the SH0 state by the transmission power control method according to the present embodiment will be described.

In the transmission power control method according to the embodiment of the present invention, the active set can be changed according to not only the above-described case but other conditions, and the cell establishing the radio link with the mobile station UE This is also possible when the number of cells that are changed or establishes a radio link with a mobile station (UE) is reduced.

Here, the radio base station Node B according to the present embodiment is configured to control one or a plurality of cells. In addition, in this embodiment, the cell includes the function of the radio base station Node B.

Here, the radio link according to this embodiment represents a DPCH or an E-DPDCH between a mobile station (UE) and a cell.

Therefore, in this embodiment, the case where the mobile station UE establishes a radio link with one cell is referred to as a "non-SHO state", and the case where a radio link is established with a plurality of cells is referred to as a "SHO state". .

In addition, in this embodiment, cell # 10 and cell # 20 may be comprised so that it may be controlled by the same single radio base station Node B, and cell # 10 and cell # 20 are different by different radio base station Node B. It may be comprised so that it may be controlled.

As shown in Fig. 16, in step S1001, the mobile station UE establishes a data connection with the radio network control station RNC for transmitting uplink user data via # 10.

In step S1002, the mobile station UE transmits a measurement report to the radio network control station RNC when the reception power of the common pilot signal from the cell # 20 becomes equal to or greater than a predetermined value.

In step S1003, the radio network controller RNC transmits, to cell # 20, a SHO setting request for establishing synchronization of an uplink radio link between the cell # 20 and the mobile station UE.

Specifically, in step S1003, the radio network controller RNC transmits a SHO setting request including the SHO parameter to the radio base station Node B # 2. For example, the SHO parameter includes a start time of the SHO, a channelization code for identifying a channel configuration in the uplink radio link, and a scramble code for identifying a mobile station (UE).

In step S1004, cell # 20 transmits a SHO setting response indicating that a SHO setting request has been received.

In step S1005, the radio network controller RNC requests the mobile station UE to establish synchronization of the downlink radio link between the cell # 20 and the mobile station UE.

Specifically, in step S1005, the radio network controller RNC sends a SHO setting request including the SHO parameter to the mobile station UE. For example, the SHO parameter includes a start time of the SHO, a channelization code for identifying a channel configuration in the uplink radio link, a scramble code for identifying a mobile station (UE), and E-RGCH information.

In step S1006, the mobile station UE transmits a SHO setting response indicating that the SHO setting request has been received.

The mobile station UE transitions from the non-SHO state to the SHO state based on this parameter. In step S1007, the mobile station UE is in soft handover (SHO) state with cell # 10 and cell # 20.

In this way, before the mobile station enters the SHO state, the radio network controller RNC transmits, to the mobile station UE and the radio base station Node B, the relative transmission rate control channel decoding information for decoding the " E-RGCH ". Notify.

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.

As described above, according to the present invention, before the mobile station enters the SHO state, the radio network controller RNC informs the mobile station of the relative transmission rate control channel decoding information for decoding the relative transmission rate control channel. Even if the set is updated, it is possible to provide a transmission rate control method and a radio network control station capable of transmitting user data at high speed.

Claims (2)

A transmission rate control method for controlling a transmission rate of uplink user data transmitted from an mobile station through an enhanced dedicated physical data channel, A radio network control station determines that a mobile station transmitting the enhanced dedicated physical data channel only for a first cell transmits the enhanced dedicated physical data channel for the first cell and a second cell other than the first cell. Process of doing; The radio network control station notifying the mobile station of the relative transmission rate control channel decoding information for decoding the relative transmission rate control channel of the uplink user data to be transmitted by the second cell based on the determination. ; After the mobile station receives the relative transmission rate control channel, transmitting the enhanced dedicated physical data channel to the first cell and the second cell; And The mobile station decodes the relative transmission rate control channel of the uplink user data to be transmitted from the second cell based on the relative transmission rate control channel decoding information and is notified by the decoded relative transmission rate control channel. Controlling a transmission rate of the uplink user data based on a relative transmission rate for the uplink user data Transmission rate control method comprising a. A wireless network control station used in a mobile communication system for controlling a transmission rate of uplink user data transmitted from an mobile station through an enhanced dedicated physical data channel, A determination unit for determining, by a mobile station transmitting the enhanced dedicated physical data channel only for a first cell, to transmit the enhanced dedicated physical data channel for the first cell and a second cell other than the first cell; And The uplink user to be transmitted by the second cell, based on the determination by the determining unit, before the mobile station initiates transmission of the enhanced dedicated physical data channel to the first cell and the second cell. A notification unit for notifying the mobile station of relative transmission rate control channel decoding information for decoding the relative transmission rate control channel of data; Wireless network control station comprising a.

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