KR100803118B1 - Controlling messages and signaling procedures for DSCH TFCI and associated DCH TFCI power control - Google Patents

Abstract

In the mobile communication system according to the present invention, a method of implementing a control message and a signal procedure for power control of a downlink shared channel (DSCH) and a transmission format combination identifier (TFCI) of a dedicated channel (DCH) associated therewith, In the control message and signal procedure for soft handover of the DCH associated with the DSCH and power control during the hard handover of the DSCH according to the movement of the mobile station, for power control of the TFCI of the DSCH and the TFCI of the associated DCH. In the user plane, a control frame including a TFCI power offset value and a new field including information on the TFCI power offset value applied to the DPCCHs transmitting the TFCI2 value during soft handover of the associated DCH is used. do.

According to the present invention, by defining a message or frame format and a procedure according to the control plane or the user plane for transmitting information for power control for the TFCI in the DSCH hard split mode according to the movement of the mobile station It enables 3GPP asynchronous system and terminal to control power of TFCI in DSCH hard split mode.

Description

Controlling messages and signaling procedures for DSCH TFCI and associated DCH TFCI for power control of downlink shared channel (DSCH) and transmission format combination identifier (TFCI) of associated dedicated channel (DCH) power control}

1 is a structure of a wireless access network during soft handoff between base stations in the same base station controller.

2 is a structure of a wireless access network at different base station control period soft handoff.

3 is a diagram illustrating an example of a delay occurrence problem when using a DSCH logical split.

4 illustrates a configuration of a downlink shared channel (DSCH).

5 is a diagram illustrating a configuration of a dedicated channel (DCH).

FIG. 6 illustrates the types of control frames used in the user plane protocol for DCH in the 3GPP Iur / Iub interface. FIG.

7 is a control frame format configuration diagram of a conventional radio interface parameter update.

8 illustrates a UMTS Radio Network control plane protocol.

9 illustrates a UMTS Radio Network user plane protocol.                 

FIG. 10 is a block diagram showing a radio interface parameter update control format according to the first embodiment of the present invention. FIG.

11 is a control frame diagram for DSCH TFCI power control in a first embodiment according to the present invention;

12A to 12D are first exemplary diagrams illustrating soft handover of a DCH and hard handover of a DSCH associated with a DSCH according to movement of a mobile station in the present invention.

Figure 13 (a) (b) is a flow diagram of a conventional signaling procedure in the exemplary diagram of FIG.

14A to 14D are flowcharts of a signaling procedure for DSCH TFCI power control according to the first embodiment of the present invention in the exemplary view of FIG. 12.

15A to 15D are flowcharts of a signaling procedure for the DSCH TFCI of the first embodiment according to the present invention in the exemplary view of FIG. 12.

16 (a) to 16 (d) are flowcharts of a signaling procedure for preparing a radio link reconfiguration of a first embodiment according to the present invention in the exemplary diagram of FIG.

17A to 17E illustrate second exemplary soft handovers of DCHs and hard handovers of DSCHs associated with movement of a mobile station according to the present invention.

18 is a flow diagram illustrating a conventional signaling procedure in the example situation of FIG. 17.

19 is a modified format configuration diagram of a radio interface parameter update control frame in a second embodiment according to the present invention;

20 is a format diagram of a DSCH TFCI power control frame in the second embodiment according to the present invention;                 

21A to 21E are flowcharts illustrating a signaling procedure for a second embodiment according to the present invention in the exemplary view of FIG. 17.

22A to 22E are flowcharts illustrating a signaling procedure for a second embodiment in the exemplary diagram of FIG. 17.

23A to 23E are flowcharts illustrating a signaling procedure for a second embodiment in the exemplary diagram of FIG. 17.

24 is a control frame format configuration diagram of an air interface parameter update for a third embodiment of the present invention.

FIG. 25 is a configuration diagram of a DSCH TFCI control frame format according to a third embodiment of the present invention. FIG.

26A to 26D are flowcharts illustrating a signaling procedure for a third embodiment in the exemplary diagram of FIG. 17.

27A to 27E are flowcharts illustrating a signaling procedure for a third embodiment in the exemplary diagram of FIG. 17.

28A to 28E are flowcharts illustrating a signaling procedure for a third embodiment in the exemplary diagram of FIG. 17.

29 is a modified format configuration diagram of a radio link interface parameter update control frame for the first and second embodiments of the present invention.

30 is a block diagram illustrating control frames for the second and third embodiments of the present invention.

The present invention provides a downlink shared channel (DSCH) transport format combination identifier (TFCI) and a control message and signal procedure for TFCI power control of a DCH associated with a DSCH in a mobile communication system. The present invention relates to a base station and a base station control signal for transmitting power control information for a TFCI field transmitted in a hard split mode when a soft handover of a dedicated channel (DCH) associated with a DSCH occurs. The present invention relates to a method for implementing an operation procedure according to adding a new control message or frame for transferring between stations and a base station control station and a base station control station.

In addition, in the present invention, different procedures, messages or frame types are presented for two cases of sending such a control message to a user plane and to a control plane. .

FIG. 1 is a diagram illustrating a structure of a radio access network in a conventional Inter Node B Soft-handover (Intra RNS) in a conventional control station (RNC).

Referring to FIG. 1, a soft handover between base stations in a control station is present in a serving control station (SRNC) 106 in a UMTS radio access network 112 below the core network 110. Manages dedicated radio resources assigned to each mobile station 109 within a Serving Radio Network Subsystem 104.

At this time, when the mobile station 109 moves from one base station Node A, 106 in the serving control station 106 to another target base station Node B, two base stations Node A, Node B are moved from the mobile station 109. Each of the received signals is demodulated, and the demodulated frames are sent to the serving control station 106, and the serving control station 106 selects the best frame among the received frames, thereby allowing the mobile station 109 to move to two base stations (Nodes). A and Node B) are simultaneously communicated to maintain the call channel. Here, the serving control station 106 and the base stations (Node A, Node B) reside in a Serving Radio Network Subsystem (SRNS) 104.

3 is a diagram illustrating a structure of a radio access network during soft handover between different control stations 116 and 118. In the UMTS radio access network 112, a serving control station SRNC 116 and a destination control station DRNC, Under a wireless environment where 118 controls a plurality of base stations 313 and 317, respectively, the mobile station 124 simultaneously establishes a call channel with each of the base stations Node B, 120 and 122 present in the two control stations 116 and 118 during soft handover. It is in a holding state.

Here, the serving control station 116 manages the dedicated radio resources assigned to each mobile station, and the destination control station (DRNC: drift RNC) 118 indicates that the mobile station 124 leaves the serving control station 116 itself. When moving to the area of the control station of the destination that provides radio resources to the mobile station 124, and exists in the destination radio network subsystem (DRNS: Drift RNS).                         

Several base stations exist below the control stations 116 and 118, and the mobile station in soft handover is in a state of maintaining transmission simultaneously with each base station belonging to these two control stations.

In each case, although sometimes handed over from one of the base stations to a new base station, the mobile station will always communicate with at least two base stations of two different cells. As described above, it can be seen that when the mobile station is handed over, controlling the power in the downlink is very important.

Meanwhile, the 3GPP system has a downlink shared channel (DSCH) as a channel for transmitting burst data types.

3 is a diagram illustrating a configuration of a downlink shared channel (DSCH). In FIG. 3, the downlink shared channel (DSCH) is composed of a radio frame of 10 ms, which can be shared and used by different users in each frame. This would be possible by multiple users being assigned one node per frame from the channelization code for the downlink shared channel (DSCH).

On the other hand, although the downlink shared channel (DSCH) is shared by multiple users, a code with a constant data rate at a particular moment can be used by only one user. Therefore, the downlink shared channel DSCH occupied by a specific mobile station MS is controlled by the mobile station occupying the channel.

In general, the downlink shared channel (DSCH) may operate in association with a dedicated channel (DCH). That is, the mobile station occupying the downlink shared channel (DSCH) necessarily has a dedicated channel (DCH). Referring to general power control, the mobile station (MS) measures the power of the dedicated channel (DCH) transmitted from the base station, and generates a transmit power control (TPC) command therefrom and transmits it to the base station. Then, the base station updates the power of the dedicated channel (DCH) based on the transmission power control command. In addition, the base station may update the power of the downlink shared channel (DSCH) by using the updated dedicated channel (DCH) power.

As such, the power of the dedicated channel (DCH) and the power of the downlink shared channel (DSCH) operate in conjunction. That is, as described above, the downlink shared channel (DSCH), which is a 3GPP downlink channel, is a common channel used by several users by dividing time and code. The downlink shared channel (DSCH) may or may not be present in time for one user. On the other hand, for each user using the downlink shared channel (DSCH) to periodically transmit the pilot field (Filot Field) required for fast power control and to send control information of the downlink shared channel (DSCH) One dedicated channel (DCH) is used in combination, which is referred to as an associated dedicated channel (DCH). Accordingly, the downlink shared channel (DSCH) may communicate with each user in association with the associated dedicated channel allocated to each user.

4 is a diagram illustrating a configuration of a dedicated channel (DCH). Referring to FIG. 4, the dedicated channel DCH includes a radio frame having a frame period T _f of 10 ms, and includes 15 slots Slot # 0 to Slot # 14 for each radio frame. Here, one slot length (T _slot ) is 2560 chips. In addition, the Dedicated Channel (DCH) is alternately interposed between a Dedicated Physical Data CHannel (DPDCH) and a Dedicated Physical Control CHannel (DPCCH). The dedicated channel (DCH) has a first N _datal bit data (Datal) to the physical data channels in order from the left silrigo, the first physical control channel may be carried a TPC (N _TPC bit) and a TFCI (N _TFCI bits) . In addition, the next physical data channel may carry N _data2 bits of data Data2, and the second physical control channel may carry N _pilot bits of pilot signals. Here, the TFCI field contains information on a channel currently being transmitted. For example, the TFCI field may transmit information on the amount of data transmitted in the current radio frame, a coding method, and the like.

When data of a user is simultaneously transmitted to a single user through a dedicated channel (DCH) and a downlink shared channel (DSCH), the information on the dedicated channel (DCH) and the downlink shared channel ( DSCH) information should be transmitted at the same time. To this end, the TFCI field divides the bits included in the TFCI field transmitted per slot into two, one half may be used for a dedicated channel (DCH) and the other half for a downlink shared channel (DSCH).                         

Two methods may exist as a method for transmitting information on a dedicated channel (DCH) and a downlink shared channel (DSCH). That is, in the first method, the TFCI information (TFCI1) for the dedicated channel (DCH) and the TFCI information (TFCI2) for the downlink shared channel (DSCH) are one codeword based on one order (second order reed muller coding). (code word) is formed and transmitted. This is called Logical Split Mode. In the second method, the TFCI information (TFCIl) for the dedicated channel (DCH) and the TFCI information (TFCI2) for the downlink shared channel (DSCH) are different from each other through the first order reed muller coding. In this case, the bits of two codewords thus formed are mixed and transmitted. This is called Hard Split Mode. Here, the second method may transmit the TFCI field even when a dedicated channel (DCH) is transmitted by a different radio network controller (RNC). That is, TFCI information (TFCI2) for the downlink shared channel (DSCH) is only transmitted in a part of base stations in the entire radio link.

The transmit power control (TPC) command is a command for power control of an uplink channel, which can be used to change the power of the uplink (or reverse). The power of the channel may be measured using a pilot.

In general, the dedicated channel (DCH) supports soft handover, while the downlink shared channel (DSCH) does not support soft handover. Therefore, when the residual channel (DCH) is in soft handover state and the downlink shared channel (DSCH) is transmitted only in one base station, different power control is required for both.                         

That is, a dedicated channel (DCH) generates a transmit power control (TPC) command by summing power from several base stations, while the downlink shared channel (DSCH) is transmitted from a base station, so that power from a transmit power control (TPC) command is generated. Power control of the downlink shared channel (DSCH) cannot be performed through the control.

Such a DSCH transport channel necessarily operates in association with a dedicated channel (DCH) transport channel. That is, a user using a DSCH has a DCH associated with it. A user equipment (UE) sends a power control command by measuring the power of the DCH. The power control of the DSCH is performed by using an offset value for the power of the transmission format combination identifier (TFCI) field in the control channel in the physical channel mapped to the DCH. D) abbreviated).

Soft handover is possible in DCH, whereas only hard handover is supported in DSCH channel. Thus, when the DCH is in a soft handover state transmitted from several base stations, and the DSCH is transmitted from only one base station, different power control is required for the DCH and the DSCH. That is, although the TPC is generated by summing the powers from the various base stations, the DSCH power cannot be controlled through the power control by the TPC because the DSCH channel is transmitted from one base station. For this reason, another power control method should be applied to the DSCH channel.

There are two methods for such a power control method as follows.

The first method is proposed to use uplink signaling information used in Site Selection Diversity Transmission (SSDT), a technology applied to 3GPP release 99. When the mobile station is soft handed over by the SSDT, the mobile station measures the power of each base station using the SSDT, selects the base station having the largest received power as the primary base station, and then physically signals it to the base station. Send it through. In this case, each of the base stations continuously transmits information when the base stations are configured as primary base stations, but non-primary base stations stop transmission. Here, operating only on the uplink means that the signal for selecting the primary base station is transmitted on the uplink, but on / off of the power on the downlink does not work.

In this case, the downlink shared channel (DSCH) power control may operate in two modes. If the base station to which the current downlink shared channel (DSCH) is transmitted is a primary base station, it is transmitted at a higher power than the reference power, which is in accordance with the transmit power control (TPC) command generated by the dedicated channel (DCH). The power can be variable. On the other hand, when the base station transmitting the downlink shared channel (DSCH) is not the primary base station, a higher power offset may be assigned. This power offset value may be set high enough to be received in all regions of the cell.

In addition, triggering of the SSDT selects a base station representing power from the network side to the mobile station, designates it as a primary base station, and informs cells belonging to another active set by using an uplink FBI bit. The cells other than the primary base station among the cells belonging to the active set are called non-primary cells, and the cells other than the primary base station stop the DPDCH transmission on the downlink and perform only the DPCCH transmission. In the SSDT, the mobile station uplinks which cell in the active set is the primary base station and which cell is not the primary base station. A method of using this information for DSCH power control during handover has been proposed.

That is, when the associated DCH is in soft handover and the DSCH performs hard handover, the DSCH is transmitted at different power values depending on whether the base station to which the DSCH is transmitted is the primary base station or not. To this end, before performing the handover, a radio network subsystem application part (RNSAP) and an interface protocol between a base station (Node B) and a base station control station (RNC) are performed. The message is used to send the correct power information in advance.

This first power control method corresponds to a power control method for the PDSCH, which is a physical channel of the DSCH. However, in addition to the power control for the DSCH channel, a new method for power control of the TFCI field used in the DSCH has been proposed. The TFCI field contains the amount of data actually loaded on the DSCH channel for each TTI (Transmission Time Interval), and includes information on the CRC size and the coding rate. This information is essential for receiving and decoding actual data. Since it is important information, reliable transmission must be guaranteed. There are two ways of delivering TFCI for such a DSCH.

1) One method is to encode and transmit TFCI (TFCIl) for the DCH and TFCI (TFCI2) for the DSCH independently of each other by 5 bits in the TFCI field of the DCH associated with the DSCH. This method is called DSCH hard split mode. In this case, each 5-bit is independently encoded in the physical layer of the base station and is contained in a 10-bit TFCI field of the DPCCH and transmitted to the physical layer of the UE.

2) The other is that the bit lengths of TFCI1 and TFCI2 are variable (the number of bits of fixed length of 10 bits can be changed to TFCI1 and how many bits are allocated to TFCI2. The variable length information is informed by the upper layer), The TFCIl and TFCI2 bits are encoded in one codeword and transmitted. This method is called DSCH logical split mode because it means that the code layer is encoded as one codeword in the physical layer of the base station.

In the case of the logical split mode, the associated DCH is not used when the associated DCH is transmitted by different RNCs (that is, the associated DCH soft handover between Inter RNCs). Because there is currently no message for transmitting TFCI2 information between RNCs, and even if such a message occurs, a delay problem may occur between the DSCH data and the TFCI2 control information (see FIG. 3). On the other hand, since the hard split does not have this process, it may be applied even when the DCH is transmitted by different RNCs.

3 is an example of a delay occurrence problem when using DSCH logical split. When the destination control station (DRNC) transmits a TFCI2 or CFN message to a protocol entity message to the serving control station (SRNC), there is no current message and a new message. Even if they do, there is a high probability that they will arrive later than the actual data transfer as they move from the destination control station to the serving control station. This causes a delay problem. As described in the drawings, MAC-c / sh: Medium Access Control protocol entity for common / shared channel, MAC-d: Medium Access Control protocol entity for dedicated channel, DCH FP: Dedicated Channel (DCH) Frame Protocol TFCI: Transport Format Combination Indicator, PHY: Physical layer (layer 1), DPCH: dedicated physical channel, DSCH FP: Downlink Shared Channel Frame Protocol.

Among these two modes, a proposal was made to separately perform power control for TFCI in DSCH hard split mode. The reason for this is as follows. Power control during soft handover is performed with the sum of the powers transmitted by all base stations forming the active set. However, the TFCI bits for the DSCH may not be transmitted at all base stations, but may be transmitted only at some base stations. Therefore, when power control is performed, it is difficult to adjust the power of the TFCI to maintain a constant quality. Three methods have been proposed to more efficiently control power for TFCI in the DSCH hard split mode.

(1) A new Power Offset (TFCI PO: associated DCH) for TFCI in all base stations transmitting TFCI2 when the associated DPCH during handover is soft handover from the RNC to which the base station transmitting the PDSCH belongs to another RNC. It is a proposal (Method 1) to use a TFCI power offset value applied to DPCCHs that transmit a TFCI2 value during soft handover.                         

(2) Differently applied power offset to primary cell and non-primary cell using SSDT information as applied in the existing DSCH power control (TFCI PO_primary: primary among DPCCHs that transmit TFCI2 value during soft handover of associated DCH) TFCI power offset value applied to DPCCH belonging to cell, TFCI PO: Proposal to give TFCI power offset value applied to DPCCH belonging to non-primary cell among DPCCHs transmitting TFCI2 value at soft handover of associated DCH (Method 2).

(3) Similarly to the second scheme, SSDT information is used. However, only the base station transmitting the DSCH is configured with an appropriate power offset using information on the primary cell and the non-primary cell. That is, if a base station transmitting a DSCH is a primary cell, a power offset value of TFCI PO_primary is used for the corresponding base station, and in the case of a non-primary cell, a power offset value of TFCI PO is used for the base station (Method 3). .

Meanwhile, in the second method, a TPC command for a dedicated channel (DCH) and a TPC command for a downlink shared channel (DSCH) are generated and transmitted to a base station by a mobile station (MS), respectively. Way. However, in the second method, there is a problem that the mobile station (MS) needs to measure not only the power for the dedicated channel (DCH) but also the power for the downlink shared channel (DSCH).

On the other hand, when the mobile station is in the soft handover state, power control is based on the sum of the powers transmitted from all base stations forming the active set. However, the TFCI field for the downlink shared channel (DSCH) is not transmitted at all base stations, but is transmitted only at some base stations, as described above. Therefore, when power control is made, it is not easy to adjust the power of the TFCI field for the downlink shared channel (DSCH) to be maintained at a constant quality.

In a conventional power control scheme, a power offset of a TFCI field for a dedicated physical channel (DPCH) may be set only at a radio link setup. Power control of the DPCH may be performed based on the set power offset. That is, since the power offset of the TFCI field for the DPCH can be changed only during the radio link setup, other power cannot be allocated when the channel environment or the configuration of the base station forming the radio link is changed.

In addition, according to the conventional method, it is possible to assign a high power offset to the TFCI field in order to maintain the quality of the TFCI field, but this is because it does not adjust the power of the TFCI field but merely fixes it. Of waste occurs.

FIG. 13 is a diagram illustrating a conventional case of a soft handover of a DCH and a hard handover of a DSCH associated with a DSCH generated according to movement of a mobile station (UE) as shown in FIGS. 12A to 12D. Signaling procedure of. (A) of FIG. 12 is before soft handover occurrence of DCH associated with DCSH, (b) is before soft handover occurrence and DCCH hard handover occurrence of DCH associated with DSCH, and (c) is hard handover occurrence of DSCH And (d) is the soft handover end state of the DCH associated with the DSCH.

This conventional procedure always sets up a radio link for the first time regardless of the number of radio links transmitting TFCI2 or the power offset for TFCI without performing power control for TFCI separately in DSCH hard split mode. When using the TFCI power offset indicated by the NBAP and RNSAP messages of the control plane.

As described above, proposals have been made to separately perform power control for TFCI in the DSCH hard split mode. However, there is no method for enabling this in practice in the 3GPP Radio Access Network (RAN) interface standard.

In order to control the TFCI power in the DSCH hard split mode, a method of transmitting the power control command between the base station Node B and the base station control station RNC and between the base station control station and the base station control station is required. It is not yet defined how the power control command for the TFCI is transmitted in the DSCH hard split mode, and thus a specific operation procedure is not defined. Accordingly, the conventional technology may cause a lot of confusion in manufacturing a 3GPP asynchronous system and a terminal performing power control for TFCI in the DSCH hard split mode.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and is used to deliver power control information for a TFCI field delivered in hard split mode when a soft handover of a dedicated channel associated with a downlink shared channel occurs. TFCI of the DSCH and TFCI of the DCH associated with the DSCH, characterized in that a signal is added between the base station and the base station control station, between the base station control station and the base station control station, and an operation procedure according to the added message or frame is proposed. Its purpose is to provide a control message and signal procedure implementation method for power control.

Another object is to transmit a power control information message for a TFCI field transmitted in hard split mode, in which case the associated DPCH transmits TFCI2 when the soft handover is performed to a control station different from the control station to which the base station transmitting the PDSCH belongs. It is an object of the present invention to provide a control message and a signal procedure implementation method for TFCI power control of a DCH associated with a DSCH and a TFCI of a DSCH characterized in that all base stations use a new power offset for a TFCI.

Another object of the present invention is to provide a power offset for a primary cell and a non-primary cell for all base stations transmitting TFCI2 using uplink SSDT information, and the DCH associated with the TFCI and the DSCH of the DSCH. Its purpose is to provide a control message and signal procedure implementation method for TFCI power control.

Another purpose is to use the uplink SSDT information as applied in the conventional DSCH power control, the base station transmitting the DSCH is a primary cell and a non-primary cell, the power offset of the DSCH to give a different and An object of the present invention is to provide a control message and signal procedure implementation method for TFCI power control of a DCH associated with a DSCH.                         

In addition, it is associated with the TFCI and the DSCH of the DSCH to present the corresponding procedure, message or frame type for the two cases of sending to the user plane and sending to the control plane, respectively. Its purpose is to provide a control message and signal procedure implementation method for TFCI power control of DCH.

In order to achieve the above object, a control message and a signal procedure implementing method for power control of a downlink shared channel (DSCH) and a transmission format combination identifier (TFCI) of a dedicated channel (DCH) associated with the present invention are provided.

A control message and signal procedure for soft handover of a DCH associated with a DSCH and power control during hard handover of a DSCH according to movement of a mobile station,

Added a new field to put information about the TFCI power offset value applied to the DPCCHs that transmit TFCI2 value during soft handover of the associated DCH in the user plane for power control of the TFCI of the DSCH and the TFCI of the associated DCH. It is characterized by using one control frame. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

In another embodiment, a control message and signal procedure for soft handover of a DCH associated with a DSCH and power control during a hard handover of a DSCH according to movement of a mobile station, the TFCI of the DSCH and the TFCI of the associated DCH. It is characterized by using a control message in the form of adding a new parameter for information on the TFCI power offset value applied to the DPCCHs transmitting the TFCI2 value during soft handover of the associated DCH in the control plane for power control. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

According to another embodiment of the present invention, in the control message and signal procedure for soft handover of the DCH associated with the DSCH and power control during the hard handover of the DSCH, the TFCI of the DSCH and the TFCI of the associated DCH are further described. TFCI power offset value applied to the DPCCH belonging to the primary cell among the DPCCHs transmitting the TFCI2 value at the soft handover of the associated DCH in the user plane for the power control for the control plane, and the DPCCH transmitting the TFCI2 value at the soft handover of the associated DCH. Among them, it is characterized by using a control frame in which a new field is added, which contains information on the TFCI power offset value applied to a DPCCH belonging to a non-primary cell. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

According to another embodiment of the present invention, in the control message and signal procedure for soft handover of the DCH associated with the DSCH and power control during the hard handover of the DSCH, the TFCI of the DSCH and the TFCI of the associated DCH are further described. TFCI power offset value applied to the DPCCH belonging to the primary cell among the DPCCHs transmitting the TFCI2 value at the soft handover of the associated DCH in the control plane for the power control, and the DPCCH transmitting the TFCI2 value at the soft handover of the associated DCH. Among them, it is characterized by using a control message in the form of adding a new parameter for information on the TFCI power offset value applied to the DPCCH belonging to the non-primary cell. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

According to another embodiment of the present invention, in the control message and signal procedure for soft handover of the DCH associated with the DSCH and power control during the hard handover of the DSCH, the TFCI of the DSCH and the TFCI of the associated DCH are further described. TFCI power offset value applied when the cell transmitting DSCH is the primary cell among the DPCCHs of the cell transmitting the TFCI2 value during soft handover of the associated DCH for TFCI Power Control in the user plane for power control TFCI power offset value applied when a cell that transmits a TFCI2 value does not transmit the DSCH and a cell that transmits the DSCH among the DPCCHs that transmit the TFCI2 value is a non-primary cell during soft handover It is characterized by using a control frame that adds a new field for information about. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

According to another embodiment of the present invention, in the control message and signal procedure for soft handover of the DCH associated with the DSCH and power control during the hard handover of the DSCH, the TFCI of the DSCH and the TFCI of the associated DCH are further described. TFCI power offset value applied when the cell transmitting the DSCH is the primary cell among the DPCCHs of the cell transmitting the TFCI2 value in the control plane for the power control for the associated DCH and the soft handover of the associated DCH. New information on the TFCI power offset value applied when a cell which does not transmit DSCH among the DPCCHs of a cell transmitting a TFCI2 value and a cell which transmits a DSCH among the DPCCHs of a cell which transmits a TFCI2 value are non-primary cells It is characterized by using a control message in the form of adding a new parameter for. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

A method of implementing a control message and a signal procedure for controlling TFCI of the DSCH and TFCI power control of the DCH associated with the DSCH according to the present invention will be described with reference to the accompanying drawings.

A signal for transmitting power control information for a TFCI field transmitted in hard split mode when a soft handover of a DCH associated with a DSCH occurs due to movement of a mobile station is performed between a base station and a base station control station, a base station control station and a base station control station. In order to make it possible to transfer data between them, we add a new control message or frame and propose an operation procedure that follows the added message or frame.

In transmitting the power control information message for the TFCI field transmitted in the hard split mode, in the first embodiment, all TFCI2 transmissions are performed when the associated DPCH performs soft handover to an RNC different from the RNC to which the base station transmitting the PDSCH belongs. The base station uses a new power offset for the TFCI, and the second embodiment transmits the power offset differently in the case of the primary cell and the non-primary cell for all base stations transmitting TFCI2 using the uplink SSDT information. In addition, the second embodiment relates to a proposal for differently providing a power offset when a base station transmitting a DSCH using a uplink SSDT information is a primary cell and a non-primary cell as in the conventional DSCH power control. For each of the two cases, respectively, to the user plane and to the control plane. The procedures and messages or frames form according to it to present.

First, general communication protocols are divided into a control plane as shown in FIG. 8 and a user plane protocol as shown in FIG. 9 because it is common to transmit control end signaling and actual end-user data for control purposes throughout the system. .

Among the UMTS protocols, control plane protocols used in a wireless network include Radio Resource Control (RRC), Radio Access Network Application Part (RANAP), and RNSAP (Radio) as shown in FIG. Network Subsystem Application Part (NBAP) and Node B Application Part (NBAP).

The interface in which the respective protocols are used is shown in FIG. 8.

Referring to FIG. 8, a protocol used between a mobile station (UE) and a base station control station (RNC) 132 is an RRC protocol and is connected to an Iub interface between a base station (Node B) 136 and a base station control station (RNC) 134. The protocol used is NBAP, the protocol used for the Iur interface between base station control station 132 and base station control station 134 is RNSAP, MSC of base station control station 132 and Core Network (hereinafter abbreviated as CN). The protocol used for the lu interface between the Mobile Services Switching Center (VLR) / Visitor Location Register (VLR) or Serving GPRS Support Node (SGSN) 130 is RANAP.

These Radio Network control plane protocols exist under client-server principle environment. That is, in the Iu interface, the UTRAN serves as a radio access server and the core network (CN) serves as a client requesting an access service from the UTRAN.

Similarly, in the Iub interface, the base station acts as a server, the control station (RNC) acts as a client, and in the Iur interface, the destination control station (DRNC: Drift RNC) 134 acts as a server and the serving control station (SRNC) 132 Serves as a client to request control services for remote base stations.

These NBAP, RNSAP, and RANAP messages contain various information about resources for the radio access bearer that spans all intervals between the base station and the base station control station, the base station control station and the base station control station, and between the core network and the base station control station. Control messages are included.

In addition, user plane protocols used in the above-mentioned interfaces include a frame protocol (PF) for carrying a UMTS user data frame. This is also called Iub FP, Iur FP, and Iu UP (User Plane Protocol) as shown in FIG. 10 according to each interface.                     

This frame protocol performs many control functions besides uplink and downlink data transmission. Control functions provided by these frame protocols include functions such as timing adjustment and synchronization, which perform important functions in asynchronous European CDMA. It also sends an outer loop power control command to the mobile station.

The types of control frames used in the user plane protocol for the DCH in the 3GPP Iur / Iub interface are shown in FIG. 6.

6, outer loop power control, Timig adjustment, DL synchronization, UL synchronization, DL signaling for DSCH, DL node synchronization, UL node synchronization, Rx Timing deviation, Radio Interface Parameter Update (Radio Interface Parameter Update), timing Control frame types such as advance may be distinguished by 8-bit coding information.

Among the control frames, a frame called an air interface parameter update includes 8-byte connection frame numbers (CFNs), 5-bit transmit power control (TPC) power offset, and 1-bit downlink power control (DPC) mode information as shown in FIG. It is used at the time of update. It consists of a payload of 4 bytes or more in total.

In addition, when the control signaling is sent using the control frame in the user plane, the signaling can be restarted faster and the message size is smaller than when the signaling is sent using the control plane.

However, when the control signaling is sent using the control frame in the user plane, the signaling is unreliably delivered. Control information sent in the control plane is usually called "control message", and control information sent in the user plane is usually called "control frame".

As described above, three schemes have been proposed for DSCH TFCI power control. In all three methods, whether to use the DSCH TFCI power control method in common should be indicated through the NBAP and RNSAP protocols.

To this end, control information called a DSCH TFCI power control identifier (PC Indicator) is added to a RADIO LINK SETUP REQUEST message and a RADIO LINK RECONFIGURATION PREPARE message. When the DSCH TFCI PC Indicator is on, it indicates that DSCH TFCI power control is operating for newly configured or reconfigured Radio Links, and when it is off, it is not operated.

First embodiment (Method-1);

Procedures and messages are as follows to assist in informing the TFCI power offset during handover. This is a procedure and message designed to assist in informing the TFCI power offsets of DPCCHs that transmit a TFCI2 value upon soft handover of the associated DCH.

As a first method (Method-1a), we added a new field that contains information about the TFCI power offset values applied to DPCCHs that transmit TFCI2 values in soft handover of the associated DCH for TFCI Power Control in the user plane. You will use a control frame of type. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

In this method, a method for newly adding TFCI Power Control fields to the RADIO INTERFACE PARAMTER UPDATE control frame used in FIG. 7 ([Method 1a-1]), or DSCH Hard There is a method ([Method 1a-2]) to create a new control frame for TFCI Power Control for split mode.

In this case, the information required includes a TFCI power offset value applied to DPCCHs transmitting a TFCI2 value during soft handover of the associated DCH. The added power offset value should be recalculated and updated by the proposed method when the number of links belonging to the active set changes or the number of links transmitting TFCI2 changes according to the link configuration change by the handover. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value. Looking at each method in detail as follows.

Specific first method [Method 1a-1];

FIG. 10 is a modified format of an existing interface parameter update control frame. In this format, the third bit of the Radio Interface Parameter Update flags indicates whether the fifth byte contains the TFCI PO value. In the above method, when the handover is over and the general TFCI Power Offset value should be used, the corresponding field may be known by containing the general TFCI Power Offset value.

The method [Method 1a-2];

11 is a format of a control frame newly created to inform the TFCI Power Offset value in the DSCH hard split mode. This new control frame can be used to report the TFCI Power Offset value in DSCH Hard split mode.

Although the field length into which the TFCI Power Offset values of FIGS. 10 and 11 are inserted is 7 bits, a maximum of 8 bits is also possible. When the 7-bit TFCI Power Offset in FIG. 11 is used, the offset range becomes 0-31.75 dB when the offset is changed by 0.25 dB.

Specifically, the air interface parameter update control frame format of FIG. 10 includes a 2-byte air interface parameter updater flag field, a 1-byte CFN field, a 1-byte TPC power offset and a DPC mode and spare bit information field, and at least 7 of 1 byte. In a format including a field containing a TFCI power offset value (TFCI PO) applied to DPCCHs that transmit a TFCI2 value in soft handover of a DCH associated with a bit or more, and comprising a payload of at least 5 bytes. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

In addition, for this purpose, the DCSH TFCI power control frame format is applied to the enhanced DSCH TFCI power control flag information field of 1 byte and TFCI applied to the DPCCHs that transmit the TFCI2 value during soft handover of at least 7 bits of the associated DCH of 1 byte. Contains information on the field containing the power offset value (TFCI PO), which consists of at least three bytes of payload. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

Then, in order to compare the signaling procedure of [Method 1a-1] and the signaling procedure of the prior art, as shown in FIG. 11, soft handover of the DCH associated with the DSCH and hard handover of the DSCH are performed as the UE moves. Let's take an example of what happens.

12 illustrates a soft hand of a DCH associated with a DSCH as the mobile station 214 moves in a system comprising a serving control station 206 and a destination control station 212, corresponding jurisdiction base stations 208, 214, and a mobile station 216. (1) is a situation before soft handover of the DCH associated with the DSCH, and (b) is a soft handover occurrence of the DCH associated with the DSCH and hard of the DSCH. A situation before handover occurs, (c) is a hard handover occurrence situation of DCSH, and (d) is a soft handover termination state of the DCH associated with the DSCH.

When the method [Method 1a-2] is used, the signaling procedure in the situation as shown in FIG. 12 is shown in FIG.

13 (a) and 13 (b) are procedures when a conventional technique is used. In (a) and (b) of FIG. 13, the TFCI power offset informed by the NBAP and RNSAP messages of the control plane is always used when the radio link is first set up regardless of the movement of the mobile station or the variation of the number of radio links transmitting TFCI2. It is supposed to be. In addition, only NBAP and RNSAP messages in the control plane may be used to transfer the TFCI Power Offset between the control station and the base station or between the control stations. That is, there is no way to inform the TFCI Power Offset in the control frame of the user plane.

However, in FIG. 14, when a radio link is added or deleted to change an active set, or when the number of radio links transmitting TFCI2 is changed, a control frame used in the user plane is used (see FIG. 10 for a form), so that an appropriate TFCI power is used. The offset can be given. (A) (b) (c) (d) of FIG. 14 is a procedure corresponding to each case of (a) (b) (c) (d) of FIG. 12, and FIG. 14 (a) shows serving control. The radio setup process is performed between the station and the base station. (B) Each control station performs a radio link setup step, and a serving control station sends a radio interface parameter update message to a corresponding base station and a destination control station. A control frame called (RADIO INTERFACE PARAMETER UPDATE) is transmitted, and a TFCI PO is included in the message. In (c), the serving control station transmits the base station and destination control station having jurisdiction, and the destination control station including the radio interface parameter update message transmission and power offset control information (TFCI PO). In (d), the serving control station transmits air interface parameter update information and power offset control information (TFCI PO) to the destination control station, and the destination control station to the corresponding base station.

In addition, the signaling procedure in the situation as shown in FIG. 12 when using the method [Method 1a-2] is shown in FIG. 15. (A) and (b) of FIG. 15 are very similar to (a) and (b) of FIG. 14, and instead of the control frame called RADIO INTERFACE PARAMETER UPDATE used in FIG. For the form, see Fig. 11. In the procedure of Fig. 15, "DSCH TFCI POWER CONTROL" is sent.

In addition, the method [Method-1b] adds to the TFCI power offset value applied to the DPCCHs that transmit the TFCI2 value upon soft handover of the DCH associated with the messages used in the NBAP and RNSAP for TFCI Power Control in the control plane. Enter the parameters. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

In the case of using [Method 1b], the signaling procedure in the situation as shown in (a) to (d) of FIG. 12 is the same as that of (a) (b) (c) (d) of FIG. As shown in FIG. 16, the TFCI power offset is not informed when the Radio Link is set up once, and not after that. RADIO LINK RECONFIGURATION PREPARE, RADIO LINK RECONFIGURATION READY, RADIO LINK RECONFIGURATION of NBAP or RNSAP, In the COMMIT message, a TFCI power offset value (TFCI PO1) applied to DPCCHs transmitting TFCI2 values during soft handover of the associated DCH is notified. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

In addition, procedures and messages for supporting TFCI power offset of all DPCCHs transmitting TFCI2 upon handover according to Primary and non-primary cells according to Uplink SSDT signaling information (Method 1b) and the prior art An example situation for comparing the techniques is shown in FIG. 17.

(A) and (b) of FIG. 18 show a second example of soft handover of the DCH and hard handover of the DSCH associated with the DSCH according to the movement of the mobile station as shown in (a) to (e) of FIG. The signaling procedure when using the prior art in the situation (a) (c) of 18.

FIG. 17 illustrates a mobile station 320 in a system comprising a serving control station 306, a destination control station 314, a destination base station 316 and a mobile station 320 that govern a plurality of base stations 308, 310. A second exemplary diagram illustrating a soft handover of a DCH associated with a DSCH and a hard handover of a DSCH according to a movement of a, wherein (a) is a situation before a soft handover of a DCH associated with a DSCH occurs, and (b) is associated with a DSCH. Before the soft handover occurs between the control stations of the DCH and the hard handover of the DSCH, (c) indicates the hard handover occurs between the control stations of the DCSH and the soft handover occurs between the control stations of the DCH, and (d) indicates the control of the DSCH. Inter-station hard handover occurs, and (e) is a soft handover termination situation of the DCH associated with the DSCH.

18 (a) (b) is a conventional signaling procedure, and as shown in FIG. 17 (a) (c), even if equipments supporting SSDT are used, a DPCCH transmitting a TFCI2 value during soft handover of an associated DCH. Among the DPCCHs belonging to the primary cell or the DPCCHs transmitting the TFCI2 value among the DPCCH belonging to the non-primary cell there was no signaling that gives a different TFCI power offset. In FIG. 18, the TFCI Power Offset information is transmitted only when the Radio Link is newly set up. In FIG. 17, the TFCI Power Offset information is transmitted only in the case of (a) and (c). Therefore, the conventional procedure cannot set an appropriate TFCI power offset value at that time according to the movement of the mobile station or the number of radio links transmitting TFCI2. The newly designed procedures and messages to support this are shown below.

Meanwhile, as a second embodiment (Method-2), informing a TFCI power offset of DPCCHs transmitting TFCI2 values according to uplink SSDT signaling information at handover according to primary and non-primary cells (Method 2). We propose a procedure and message designed to support.

[Method 2a] The TFCI power offset value applied to the DPCCH belonging to the primary cell among the DPCCHs transmitting the TFCI2 value at the soft handover of the associated DCH for TFCI Power Control in the user plane, and the TFCI2 value at the soft handover of the associated DCH. The control frame is a form of adding a new field for inserting information on the TFCI power offset value applied to the DPCCH belonging to the non-primary cell among the DPCCH transmitting the.

This method is similar to Method 1a in Method 1 mentioned above. However, since the control information to be added is different from Methol 1, and the actual situation in which this information is required, the operation of the procedure and the format of the control frame are also changed accordingly. A method of newly adding TFCI Power Control fields to the RADIO INTERFACE PARAMTER UPDATE control frame used in FIG. 7 ([Method 2a-1]) or a new control frame for TFCI Power Control for the DSCH Hard split mode. There is a method of making it ([Method 2a-2]).

The necessary information includes a TFCI power offset (TFCI PO_primary) value applied to the DPCCH belonging to the primary cell among the DPCCHs that transmit the TFCI2 value at the soft handover of the associated DCH, and the TFCI2 value at the soft handover of the associated DCH. Among the transmitting DPCCHs, there is a TFCI power offset (TFCI PO_non_primary) value applied to a DPCCH belonging to a non-primary cell. These values are used in different situations depending on the link change caused by handover. That is, if the number of links belonging to the active set changes or the number of links transmitting TFCI2 changes, it must be recalculated and updated by the proposed method. Looking at each method in detail as follows.

[Method 2a-1] FIG. 19 is a modified format of an existing RADIO INTERFACE PARAMTER UPDATE control frame. In this format, the third bit of the Radio Interface Parameter Update flags indicates whether the fifth byte contains the TFCI PO value. The fourth bit indicates whether the sixth byte contains TFCI PO_primary and the fifth bit indicates whether the seventh byte contains TFCI PO_non_primary.

That is, the control frame format of FIG. 19 is associated with a radio frame parameter updater flag information field of 2 bytes, a CFN information field of 1 byte, a TPC PO and DPC mode information field of 1 byte, and at least 7 bits or more of 1 byte. A field containing a TFCI power offset value (TFCI PO) applied to DPCCHs that transmit TFCI2 value during soft handover of DCH, and belongs to a primary cell among DPCCHs that transmit TFCI2 value during soft handover of the associated DCH. TFCI power offset value field (TFCI PO_primary) of the TFCI power offset value applied to the DPCCH is configured in the format, TFCI power offset applied to the DPCCH belonging to the non-primary cell among the DPCCH transmitting the TFCI2 value during soft handover of the associated DCH The value is applied to the above-mentioned TFCI PO field value, and consists of at least 6 bytes of payload.

[Method 2a-2] FIG. 20 is a format of a control frame newly created to inform the TFCI Power Offset value in the DSCH hard split mode. This new control frame can be used to report the TFCI Power Offset value in DSCH Hard split mode.

The control frame format of FIG. 20 includes a field containing a DSCH TFCI power control flag of 1 byte, a TFCI power offset value applied to DPCCHs that transmit a TFCI2 value during soft handover of an associated DCH of at least 7 bits of 1 byte. (TFCI PO), the information field (TFCI PO_primary) of the TFCI power offset value applied to the DPCCH belonging to the primary cell among the DPCCH transmitting the TFCI2 value during soft handover of the associated DCH is configured in the format, the soft of the associated DCH The TFCI power offset value applied to the DPCCH belonging to the non-primary cell among the DPCCHs transmitting the TFCI2 value at the time of handover is applied to the TFCI PO field value and consists of at least 4 bytes of payload.

Although the field length into which the TFCI Power Offset values of FIGS. 19 and 20 are inserted is 7 bits, a maximum of 8 bits is also possible. When the 7-bit TFCI Power Offset in FIG. 10 is used, the offset range becomes 0-31.75 dB when the offset is changed by 0.25 dB.                     

In order to compare the signaling procedure of [Method 2a] and the signaling procedure of the prior art, as shown in FIG. 17, the soft handover of the DCH and the hard handover of the DSCH are generated as the UE moves. I'll listen.

When using [Method 2a1], the signaling procedure in the situation as shown in FIG. In the conventional procedure of FIG. 17, the power offset for the TFCI always informs the NBAP and RNSAP messages of the control plane when the Radio Link is first set up regardless of the movement of the UE or the variation of the number of radio links transmitting TFCI2. The offset is to be used. In addition, only NBAP and RNSAP messages in the control plane are used to transfer TFCI Power Offset between the RNC and the base station or between the RNCs.

 That is, there is no way to inform the TFCI Power Offset in the control frame of the user plane. However, when the radio link is added or deleted in FIG. 21 (b) to change the active set or the number of Radio Links transmitting TFCI2 is changed, a control frame used in the user plane is used (see FIG. 19 for a form). ), It will tell you the appropriate TFCI power offset.

When [Method 2a-2] is used, the signaling procedure in the situation as shown in FIG. 17 is shown in FIG. 22, and instead of a control frame called "RADO INTERFACE PARAMETER UPDATE" used in FIG. 20 is sent to the control frame (named "DSCH TFCI POWER CONTROL" in the procedure of Figure 22).

[Method 2b] TFCI power offset value applied to DPCCH belonging to primary cell among DPCCHs transmitting TFCI2 value during soft handover of DCH associated with messages used in NBAF and RNSAP for TFCI Power Control in control plane; In the soft handover of the associated DCH, an additional parameter for the TFCI power offset value applied to the DPCCH belonging to the non-primary cell among the DPCCHs transmitting the TFCI2 value is included. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

FIG. 23 is a signaling procedure for adjusting TFCI power offset using Method-2b for supporting Method B in the same situation as in FIG. 17. As shown, the TFCI power offset is not known when setting up one Radio Link, and not afterwards. Depending on the situation, the "RADIO LINK RECONFIGURAITON PREPARE", "RADIO LINK RECONFIGURAITON READY", "RADIO LINK RECONFIGURAITON COMMIT" "TFCI power offset value (TFCI PO_primary) of DPCCH belonging to primary cell among DPCCHs transmitting TFCI2 value in soft handover of DCH associated in message, for DPCCH belonging to non-primary cell among DPCCHs transmitting TFCI2 value This is a method of informing a user by inserting a TFCI power offset value (TFCI PO). In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value.

In addition, procedures and messages for supporting the notification of the TFCI power offset of the DPCCH of the base station transmitting the DSCH according to Uplink SSDT signaling information according to the case of primary and non-primary cells (Method 3) and the prior art An example situation for comparison is shown in FIG. 17.

18 is a signaling procedure when using the prior art in the example situation of FIG. 17. In FIG. 18, even when the devices supporting the SSDT are used, signaling that provides a different TFCI power offset does not exist for a case where a base station transmitting a DSCH is a primary cell and a non-primary cell. In FIG. 18, the TFCI Power Offset information is transmitted only when the Radio Link is newly set up. Therefore, in the case of (a) and (c) of FIG. Therefore, the conventional procedure cannot set the appropriate TFCI power offset value at that time when changing to primary and non-primary according to the change of radio link status. The newly designed procedures and messages to support this are shown below.

Third Embodiment (Method 3): Supporting different notification of TFCI power offsets of DPCCHs of cells transmitting DSCHs according to uplink SSDT signaling information in case of primary and non-primary cells during handover of a mobile station The procedures and messages designed for this are as follows.

As an embodiment, the TFCI power offset value applied when the cell transmitting the DSCH is a primary cell among the DPCCHs of the cell transmitting the TFCI2 value at the soft handover of the associated DCH for TFCI Power Control in the user plane, and the associated DCH TFCI power offset value applied when a cell that transmits TFCI2 value does not transmit DSCN and a cell that transmits DSCH among DPCCHs that transmit TFCI2 value is a non-primary cell during soft handover You will use a control frame that adds a new field that contains information about.

This method is similar to Method 2a in Method 2 mentioned above. However, since the control information to be added is different from Method 2 and the actual situation in which this information is required, the operation of the procedure and the format of the control frame are also changed accordingly.

A method of newly adding fields for TFCI Power Control to the RADIO INTERFACE PARAMTER UPDATE control frame used in FIG. 7 ([Method 3a]) or TFCI Power for DSCH Hard split mode. There is a way to create a new control frame ([Method 3b]).

The necessary information includes a TFCI power offset (TFCI PO_primary) value applied when the cell transmitting the DSCH is a primary cell among the DPCCHs of the cell transmitting the TFCI2 value during the soft handover of the associated DCH and the soft handover of the associated DCH. A TFCI power offset (TFCI PO) value applied when a cell that transmits a DSCH among the DPCCHs of a cell that transmits a TFCI2 value to a cell that transmits a TFCI2 value and a cell that transmits a DSCH among the DPCCHs of a cell that transmits a TFCI2 value are non-primary cells. There is this. These values are used in different situations depending on the link change caused by handover. That is, if the number of links belonging to the active set changes or the number of links transmitting TFCI2 changes, it must be recalculated and updated by the proposed method. In the above method, when a handover is over and a general TFCI Power Offset value should be used, the corresponding field may be known by containing a general TFCI Power Offset value. Looking at each method in detail as follows.                     

[Method 3a-1] FIG. 24 illustrates a modified format of an existing RADIO INTERFACE PARAMTER UPDATE control frame. In this format, the third bit of Radio Interface Parameter Update flags indicates whether the fifth byte contains the TFCI PO1 value, and the fourth bit indicates whether the sixth byte contains the TFCI PO_primary.

Referring to FIG. 24, the control frame format includes a 2-byte air interface parameter update flag information field, a 1-byte CFN information field, a 1-byte TPC power offset and a DPC mode, and a TFCI PO field of at least 7 bits. It includes at least 7-bit TFCI PO_primary field and consists of payload of 6 bytes or more.

[Method 3a-2] FIG. 25 is a format of a control frame newly created to inform the TFCI Powsr Offset value in the DSCH hard split mode. This new control frame can be used to report the TFCI Power Offset value in DSCH Hard split mode.

Referring to FIG. 25, the control frame format includes a DSCH TFCI power control flag field of 1 byte, a TFCI PO information field of at least 7 bits, and a TFCI PO_primary field of at least 7 bits, and is composed of a payload of 4 bytes or more. .

Although the field length into which the TFCI Power Offset values of FIGS. 24 and 25 are inserted is 7 bits, a maximum of 8 bits is also possible. When the 7-bit TFCI Power Offset in FIG. 10 is used, the offset range becomes 0-31.75 dB when the offset is changed by 0.25 dB.                     

In order to compare the signaling procedure of [Method 3a] and the conventional signaling procedure, a soft handover of the DCH and a hard handover of the DSCH are generated as a mobile station (UE) moves as shown in FIG. 17 as an example. I'll listen.

When using [Method 3a-1], the signaling procedure in the situation as shown in FIG. 17 is as shown in FIG. In the conventional procedure of FIG. 18, the power offset for the TFCI always indicates the TFCI power in the NBAP and RNSAP messages of the control plane when the Radio Link is first set up regardless of the movement of the UE or the variation of the number of radio links transmitting TFCI2. It is intended to use offset.

In addition, only NBAP and RNSAP messages in the control plane are used to transfer TFCI Power Offset between the RNC and the base station or between the RNCs. That is, there is no way to inform the TFCI Power Offset in the control frame of the user plane. However, in FIG. 26, when a change is made to an active set due to addition or deletion of a radio link, or when the number of radio links transmitting TFCI2 is changed, a control frame used in the user plane is used (see FIG. 25 for a form), so that an appropriate TFCI power is used. The offset can be given.

When [Method 1a-2] is used, the signaling procedure in the situation as shown in FIG. 22 is shown in FIG. 27, and a new control frame for TFCI Power Control only is used instead of the control frame called RADIO INTERFACE PARAMETER UPDATE used in FIG. 24. 25, "DSCH TFCI POWER CONTROL" is sent in the procedure of FIG. 27).                     

[Method 3b] In the control plane, the message used in NBAP and RNSAP for TFCI Power Control is transmitted to the cell transmitting the DSCH among the DPCCHs of the cell transmitting the TFCI2 value during soft handover of the DCH associated with the TFCI Power Offset value. TFCI applied to the cell that does not transmit the DSCH among the TFCI power offset values (different values depending on whether the cell is primary or non-primary) and DPCCHs of cells transmitting the TFCI2 value during soft handover of the associated DCH. Enter additional parameters for the power offset value.

FIG. 28 is a signaling procedure for adjusting a TFCI power offset for supporting Method 3 in the situation as shown in FIG. 17. As shown, the TFCI power offset is not known when setting up the Radio Link once and then not afterwards. Instead, the DCH is normally displayed in the RADIO LINK RECONFIGURAITON PREPARE, RADIO LINK RECONFIGURAITON READY, RADIO LINK RECONFIGURAITON COMMIT messages, depending on the situation. A value for the TFCI power offset (PO1) applied for the TFCI power offset value (TFCI) applied when the cell transmitting the DSCH among the DPCCHs of the cell transmitting the TFCI2 value at the soft handover of the associated DCH is a primary cell. PO_primary), when a soft handover of the associated DCH transmits a TFCI2 value but does not transmit a DSCH, and a base station that transmits a DSCH is a non-primary cell among the DPCCHs of a cell transmitting a TFCI2 value, This is a method to notify by inserting a TFCI power offset value (TFCI PO).

In addition, in the user plane, parameters required in the first and second embodiments may be sent in one frame format at a time.

As a fourth embodiment, a method for inserting parameters for the first and second embodiments (Methods 1 and 2) into one frame format in the user plane.

The frame format used in this case is the same as in FIG. 29 and FIG. If a frame such as FIG. 29 is used, a RADIO INTERFACE PARAMETER UPDATE control frame is sent for both the procedure for [Method 1a] of Method 1 and the procedure for [Method 1a] of Method 2, respectively. . If a new frame is used as shown in FIG. 29, a DSCH TFCI POWER CONTROL control frame is sent in both a procedure for [Method 1b] of Method 1 and a procedure for [Method 2b] of Method 2; You lose.

In the control frame format of FIG. 30, the control frame format includes a 2-byte air interface parameter updater flag information field, a 1-byte CFN information field, a 1-byte TPC power offset and a DPC mode information field, and at least one of 1 byte. Among the DPCCHs transmitting the TFCI2 value during soft handover of the associated DCH and the field containing the TFCI power offset value (TFCI PO) applied to the DPCCHs transmitting the TFCI2 value upon soft handover of the associated DCH of 7 bits or more. TFCI power offset information field (TFCI PO_primary) applied to the DPCCH belonging to the primary cell and TFCI power offset applied to the DPCCH belonging to the non-primary cell among the DPCCHs transmitting the TFCI2 value during soft handover of the associated DCH. The information field (TFCI PO_non_primary) of the value is configured in a format and consists of a payload of 7 bytes.                     

The control frame format of FIG. 31 includes a field containing a TFCI power offset value (TFCI PO) applied to DPCCHs that transmit a TFCI2 value upon soft handover of an associated DCH of at least 7 bits of 1 byte, and the soft hand of the associated DCH. Among the DPCCHs transmitting the TFCI2 value at the time of over, the information field (TFCI PO_primary) of the TFCI power offset value applied to the DPCCH belonging to the primary cell, and non- among the DPCCHs transmitting the TFCI2 value at the soft handover of the associated DCH. The information field (TFCI PO_non_primary) of the TFCI power offset value applied to the DPCCH belonging to the primary cell includes a format and consists of a payload of 3 bytes.

In addition, in the user plane, the parameters required in the first and third embodiments may be sent in one frame format at a time.

As a sixth embodiment, the first and second embodiments are a method of putting a parameter in one frame format in a user plane.

The frame format used in this case is the same as that of FIG. If a frame such as FIG. 24 is used, a RADIO INTERFACE PARAMETER UPDATE control frame is sent in both a procedure for [Method la] of Method 1 and a procedure for [Method 2a] of Method 2. . If a new frame is used as shown in FIG. 25, a DSCH TFCI POWER CONTROL control frame is sent in both the procedure for [Method 1a] of Method 1 and the procedure for [Method 2a] of Method 2. You lose. In this case, TFCI PO is commonly used in both Method 1 and Method 2. Actual parameter values may or may not be the same in some cases.

As described above, the present invention provides a method of implementing a control message and a signal procedure for power control of a downlink shared channel and a transmission format combination identifier of a dedicated channel associated therewith, according to a conventional UMTS radio interface protocol. Proposed and defined that there was no message or procedure that informs power control for TFCI in DSCH hard split mode between the base station control station (RNC) and the base station control station and the base station control station.

In the present invention, the DSCH in the 3GPP asynchronous system and the terminal by defining a message or frame format in the control plane or the user plane and a procedure for each to transmit information for power control for the TFCI in the DSCH hard split mode. Allows you to perform power control for TFCI in hard split mode.

In addition, when using the control message or frame type and procedure proposed in the present invention, the TFCI power offset is appropriately adjusted according to the movement of the UE or the change of the number of radio links transmitting TFCI2 when the Radio Link is initially set up. It is possible to tell this information by setting a value.

Claims (28)

A signaling method for power control for a transport format combination identifier (TFCI) in a mobile communication system, Generating a control frame including a first offset used for controlling the transmit power of the TFCI and a second offset used for controlling the transmit power of the TFCI; And Transmitting the control frame from a specific first control station (RNC) to a particular base station (BS) And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 1, The first offset and the second offset are power offsets of the TFCI for the Dedicated Physical Data Channel (DPDCH), respectively, The second offset is applied when the cell to which the TFCI is transmitted according to the SSDT operation is a primary base station. Otherwise the first offset is applied And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 1, The control frame is transmitted through a protocol of a user plane And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 1, The control frame is a radio interface parameter update (RADIO INTERFACE PARAMETER UPDATE) frame used to update a parameter transmitted through the air interface. And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 4, wherein The first offset is characterized in that the offset relative to the DPDCH The second offset is used when the base station transmitting the TFCI as the offset for the DPDCH is determined as the primary base station according to the SSDT operation. And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 5, The radio interface parameter update (RADIO INTERFACE PARAMETER UPDATE) frame includes 6 bytes, The first offset is included in the fifth byte and is 7 bits, The second offset is included in the sixth byte and is 7 bits And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 6, The radio interface parameter update (RADIO INTERFACE PARAMETER UPDATE) frame includes a radio interface parameter update flag (RADIO INTERFACE PARAMETER UPDATE FLAGS) including a first byte and a second byte, A third bit of the air interface parameter update flag indicates whether the first offset is included; The fourth bit of the air interface parameter update flag indicates whether the second offset is included. And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 1, The first offset is an offset used when the base station transmitting the TFCI is a non-primary base station. The second offset is an offset used when the base station transmitting the DSCH is a primary base station according to the SSDT operation. And transmitting and receiving power control information for a transport format combination identifier (TFCI). A signaling method for power control for a transport format combination identifier (TFCI) in a mobile communication system, Obtaining information on whether a specific base station is determined as a primary base station by a Site Selection Diversity Transmit power control (SSDT) operation; Transmitting, from a specific control station (RNC) to a specific base station, information about an offset value for power control of the TFCI determined according to whether the base station is a primary base station; And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 9, The offset value is used for power control of TFCI for downlink shared channel (DSCH). And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 9, The field for transmitting the TFCI is, A first TFCI field generated by a specific first coding method and for a DSCH; and Generated by a particular second coding method and comprising a second TFCI field for the DCH And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 9, The information about the offset value is included in the Radio Link Setup message. And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 9, Information about the offset value is included in the Radio Link Reconfiguration Preparation message. And transmitting and receiving power control information for a transport format combination identifier (TFCI). A signaling method for power control for a transport format combination identifier (TFCI) in a mobile communication system, Generating identification information indicating whether only a first offset for controlling transmission power of the TFCI is provided or whether a first offset and a second offset for controlling transmission power of the TFCI are provided; Transmitting the identification information to either a second control station or a base station at a specific first control station (RNC); And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 14, The first offset and the second offset are power offsets of the TFCI for the Dedicated Physical Data Channel (DPDCH), respectively, The second offset is applied when the cell to which the TFCI is transmitted according to the SSDT operation is the main station. Otherwise the first offset is applied And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 14, The first offset is characterized in that the offset relative to the DPDCH The second offset is used when the base station transmitting the TFCI as the offset for the DPDCH is determined as the primary base station according to the SSDT operation. And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 14, The first offset is an offset used when the base station transmitting the TFCI is a non-primary base station. The second offset is an offset used when the base station transmitting the DSCH is a primary base station according to the SSDT operation. And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 14, The identification information is transmitted using a Radio Link Setup message. And transmitting and receiving power control information for a transport format combination identifier (TFCI). The method of claim 14, Receiving information on whether to support power control for the TFCI from at least one selected base station; And transmitting and receiving power control information for a transport format combination identifier (TFCI). delete delete delete delete delete delete delete delete delete

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