CN101247175B - Mobile communication terminal and radio communication system - Google Patents

Abstract

An objective of the invention is to obtain mobile communication terminal and radio communication system for improving multimedia data receiving quality without controlling sending power by base station, wherein multipath signal of wireless signal sent from multiple base station (5) are allotted to every sending source base station by using S-CCPCH, multiple multipath signal related sending source as same base station are executed maximum ratio synthesizing, and the synthesizing signal is decoded, and synthesizing signal with good decoding result are selected from decoded synthesizing signal.

Description

Wireless communication system

The application is the divisional application of following application:

Denomination of invention: mobile communication terminal and wireless communication system

The applying date: on March 30th, 2004

Application number: 200710101164.3

Technical field

The present invention relates to a kind of utilizing CDMA (Code Division Multiple Access: code division multiple access) mode can improve mobile communication terminal and the wireless communication system of its quality of reception while receiving the multi-medium data sending over from base station.

Background technology

It is prerequisite that existing wireless communication system such as, be 1 pair 1 to close with base station and mobile communication terminal (mobile phone, mobile PC etc.), there is no to consider to be sent to multiple mobile communication terminals by base station the service of data simultaneously.All the time, exist base station to use public channel to send simultaneously the method for the information of reporting to the mobile communication terminal in compass of competency, but this method is only notifying simultaneously and controls relevant information, instead of send simultaneously the data such as sound or image.

But, in recent years, as Mobile Communication Service, people expect multimedia service, and the technology that particularly multi-medium data of physical culture relay, weather forecast or broadcast etc. is distributed to simultaneously to multiple mobile communication terminals is especially attracted attention.

Therefore, (reference example is as patent documentation 1 to have proposed following technology, non-patent literature 1), the 1st common signal channel (P-CCPCH:Primary-Common Control Physical Channel: basic Common Control Channel) using when the information of reporting being notified in base station to multiple mobile communication terminal, prepare again in base station the 2nd common signal channel (S-CCPCH:Secondary-CommonControl Physical Channel: auxiliary Common Control Channel) using when signaling or multi-medium data are sent to multiple mobile communication terminal, base station utilizes S-CCPCH that multi-medium data is distributed to multiple mobile communication terminals.

According to this kind of mode, as long as utilizing S-CCPCH to send multi-medium data, base station just can provide multi-medium data to multiple mobile communication terminals simultaneously, but, even if mobile communication terminal is positioned at the compass of competency of this base station, for example ought be positioned near the situation periphery of compass of competency, the electric wave sending over from base station can die down, and the quality of reception can variation.

Therefore, base station possesses the function for controlling transmitted power, also can exceed reference power so that be positioned at the received power of the mobile communication terminal of received power minimum among the mobile communication terminal of self compass of competency.

On the other hand, mobile communication terminal also possesses in the case of receiving from multiple base stations identical multi-medium data by multiple multi-medium datas are carried out to the function that maximum ratio synthesizes to improve the quality of reception.But, owing to arriving the transmission path difference of the multi-medium data of mobile communication terminal from multiple base stations, so the multi-medium data sending out from multiple base stations is in the time of reception difference of mobile communication terminal, become the scheduled time when above when this time of reception is poor, just cannot carry out the maximum ratio of multiple multi-medium datas and synthesize.

[patent documentation 1] Japanese Patent Publication JP 2003-188818 communique

[non-patent literature 1] 3GPP standardization document R1-031103 Selective Combiningfor MBMS

Existing wireless communication system has structure as above, therefore, exceed reference power as long as the received power of the mobile communication terminal of received power minimum among the mobile communication terminal that transmitted power makes to be positioned at self compass of competency is controlled in base station, just can guarantee the quality of reception of mobile communication terminal.But existing problem is: improve while distributing to the transmitted power of S-CCPCH when base station, the transmitted power of distributing to other channels will reduce relatively, therefore, use the quality of reception of the information that other channels send will variation.

In addition, synthesize as long as the same multi-medium data sending over from multiple base stations is carried out maximum ratio by mobile communication terminal, even if transmitted power is not controlled in base station, also can improve the quality of reception.But, existing problem is: because arrive the transmission path difference of the multi-medium data of mobile communication terminal from multiple base stations, so the multi-medium data sending out from multiple base stations is in the time of reception difference of mobile communication terminal, become the scheduled time when above when this time of reception is poor, just cannot carry out the maximum ratio of multiple multi-medium datas and synthesize.

Summary of the invention

The present invention makes in order to solve the above problems, and object is to obtain a kind of transmitted power control without base station and can improve mobile communication terminal and the wireless communication system of the quality of reception of multi-medium data.

Mobile communication terminal of the present invention is provided with: maximum ratio synthesis unit, multipath signal (multipath signal) that will be relevant to the wireless signal that utilizes common signal channel to send from multiple base stations be distributed to each transmission source base station, will be that multiple multipath signals that same base station is relevant carry out maximum ratio and synthesize to transmission source; And decoding unit, decoding is from the composite signal of this maximum ratio synthesis unit output; The successful composite signal of selective decompression among the composite signal by this decoding unit decodes.

Thus, just can obtain the effect that also can improve the quality of reception of wireless signal without base station control transmitted power.

Brief description of the drawings

Fig. 1 is the structure chart that represents the wireless communication system of the 1st execution mode of the present invention.

Fig. 2 is the structure chart that represents the mobile communication terminal of the 1st execution mode of the present invention.

Fig. 3 is the structure chart that represents the base station of the 1st execution mode of the present invention.

Fig. 4 is the structure chart that represents the base-station control apparatus of the 1st execution mode of the present invention.

Fig. 5 is the key diagram that represents the channel architecture between mobile communication terminal and base station.

Fig. 6 is the key diagram that represents the base station of monitored object.

Fig. 7 is the flow chart that represents the contents processing of the mobile communication terminal of the 1st execution mode of the present invention.

Fig. 8 is the flow chart that represents the contents processing of the mobile communication terminal of the 1st execution mode of the present invention.

Fig. 9 is the flow chart that represents the contents processing of the mobile communication terminal of the 2nd execution mode of the present invention.

Figure 10 is the flow chart that represents the contents processing of the mobile communication terminal of the 3rd execution mode of the present invention.

Figure 11 is the flow chart that represents the contents processing of the mobile communication terminal of the 3rd execution mode of the present invention.

Figure 12 is the sequence chart that represents the signaling (signaling) of Active Set in wireless communication system (active set) renewal.

Figure 13 is the sequence chart that the parameter while representing activating set updating in wireless communication system is reported.

Figure 14 is the flow chart that represents the renewal processing of Active Set in mobile communication terminal.

Figure 15 is the sequence chart that represents the notice of the power ratio of CPICH and S-CCPCH.

Figure 16 is the flow chart that represents the renewal processing of Active Set in mobile communication terminal.

Embodiment

In order to illustrate in greater detail the present invention, implement the preferred embodiment of the present invention according to brief description of the drawings below.

The 1st execution mode

Fig. 1 is the structure chart that represents the wireless communication system of the 1st execution mode of the present invention, and in figure, service centre 1 in the content of distributing, carries out the dispensing of this content in keeping.GGSN (Gateway GPRS Support Node:GPRS gateway support node) 2 becomes the door that leads to external network (for example internet) of bearing with outside gateway function, and guarantees the path (path) for grouping (packet) is passed through.In addition, the policy control of flow etc. is consulted, is adjusted in the collection, mobile management, QoS (Quality of Service: service quality) of in addition implementing pay imformation.SGSN (Service GPRS Support Node: Serving GPRS Support Node) 3 is responsible for packet communication, processes about each user's certification, adds service, route, mobile management, service restriction, context (context) keeping, pay imformation etc.

Base-station control apparatus 4 is connected with SGSN3, has the function of relaying between core network (Core Network) and the radio-circuit of base station 5, and main managing radio resources sends channel establishment and the instruction discharging etc. for base station 5.Base station 5 under the instruction of base-station control apparatus 4, for example, is used S-CCPCH (common signal channel) that wireless signal (for example multi-medium data, pilot signal) is sent to the mobile communication terminal 6 in compass of competency.

The function that mobile communication terminal 6 possesses comprises: in the time receiving the multipath signal relevant to the wireless signal that uses S-CCPCH to send over from multiple base stations 5, this multipath signal is assigned to each transmission source base station 5, to be that multiple multipath signals that same base station 5 is relevant carry out maximum ratio and synthesize and decode, successful composite signal of selective decompression etc. from decoded composite signal to transmission source.

Fig. 2 is the structure chart that represents the mobile communication terminal of the 1st execution mode of the present invention, and in figure, low noise enlarging section 12 is that multipath signal amplifies to the faint wireless signal receiving from antenna 11.Frequency conversion part 13 converts and exports RF (Radio Frequency: radio frequency) signal by the frequency of the multipath signal after amplifying by low noise enlarging section 12.A/D transformation component 14 is that RF signal is transformed to digital signal by the analog signal of exporting from frequency conversion part 13.In addition, antenna 11, low noise enlarging section 12, frequency conversion part 13 and A/D transformation component 14 have formed signal receiving unit.

In the time that search section 15 receives the RF signal of digital signal from A/D transformation component 14, by carrying out community (cell) thus search process and the transmission source base station 5 of this multipath signal detected.Code generator 16 generate with by the corresponding scrambler in the detected base station 5 of search section 15.

Branch road (finger) distributes control part 17 to control the synthetic portion 18 of RAKE, so that among multiple base stations 5, for example, when monitored object base station 5, (hereinafter referred to as Active Set) is set to base station A, in the situation of B, RF signal relevant the 1st multipath signal sending out to base station A (hereinafter referred to as RF signal A-1) is assigned to the 18a of branch road portion, the RF signal relevant to the 2nd multipath signal (hereinafter referred to as RF signal A-2) is assigned to the 18b of branch road portion, in addition, RF signal relevant the 1st multipath signal sending out to base station B (hereinafter referred to as RF signal B-1) is assigned to the 18c of branch road portion, the RF signal relevant to the 2nd multipath signal (hereinafter referred to as RF signal B-2) is assigned to the 18b of branch road portion.

The synthetic 18e of portion in the synthetic Bu18 of RAKE community carries out maximum ratio by the RF signal A-1 that is assigned to the 18a of branch road portion with the RF signal A-2 that is assigned to the 18b of branch road portion and synthesizes, and this composite signal is saved in to community input store 19a.The synthetic 18f of portion in community carries out maximum ratio by the RF signal B-1 that is assigned to the 18c of branch road portion with the RF signal B-2 that is assigned to the 18d of branch road portion and synthesizes, and this composite signal is saved in to community input store 19b.

In addition, distribute control part 17, RAKE synthetic Bu18Ji community input store 19a, b to form maximum ratio synthesis unit by search section 15, code generator 16, branch road.

Lsb decoder 20 is by the composite signal decoding being kept in the input store 19a of community, decoded composite signal is kept in the output storage 21a of community, and by the composite signal decoding being kept in the input store 19b of community, decoded composite signal is kept in the output storage 21b of community.

In addition, formed decoding unit by lsb decoder 20Ji community output storage 21a, 21b.

Selection portion 22 successful composite signal of selective decompression from be kept at the decoded composite signal community output storage 21a, 21b outputs to common down channel acceptance division 23.In addition, selection portion 23 has formed selected cell.

The composite signal of exporting from selection portion 22 is if control information, and common down channel acceptance division 23 just outputs to protocol processes portion 26 by this composite signal; Above-mentioned composite signal is if application data, and this composite signal is outputed to application handling part 27 by 23 of common down channel acceptance divisions.When the decoded composite signal being kept in the output storage 21a of community is to report in the situation of information, selection portion 22 is not carried out the selection processing of composite signal, therefore, reports after information acceptance division 24 receives this composite signal and outputs to protocol processes portion 26.

Even if the decoded composite signal being kept in the output storage 21a of community is application data or control information, in the situation that base station 5 utilizes descending separate channel to send, because selection portion 22 is not carried out the selection processing of composite signal, so descending separate channel acceptance division 25 receives this composite signal, if this composite signal is application data, just this composite signal is outputed to application handling part 27, if this composite signal is control information, just this composite signal is outputed to protocol processes portion 26.

Protocol processes portion 26 according to from common down channel acceptance division 23, report the composite signal that information acceptance division 24 or descending separate channel acceptance division 25 export (control information, report information) and carry out the processing relevant to Control on Communication such as setting/release or handing-over of channel.

Application handling part 27 is according to the composite signal (application data) of exporting from common down channel acceptance division 23 or descending separate channel acceptance division 25, carry out the conversion process such as sound encoding and decoding or image coding and decoding, in addition the processing of the man-machine interface such as execute key input or picture disply.

When have control information output from protocol processes portion 26, uplink common channel sending part 28 is just carried out chnnel coding or is sent the common signal channel processing such as timing.In the time that up separate channel sending part 29 receives by the telephone number inputted of application handling part 27 etc., carry out chnnel coding or send the separate channel processing such as timing.

Code generator 30 generates diffuse coding, and the signal that modulation portion 31 is exported uplink common channel sending part 28 or up separate channel sending part 29 by above-mentioned diffuse coding carries out diffusion modulation.

The digital signal that D/A transformation component 32 is exported modulation portion 31 is that modulation signal is transformed to analog signal.Frequency conversion part 33 is to having carried out the frequency translation of the modulation signal after D/A conversion and having exported RF signal through D/A transformation component 32.Power amplification portion 34 will output to antenna 11 after the power amplification of RF signal.

Fig. 3 is the structure chart that represents the base station of the 1st execution mode of the present invention, in figure, receives while reporting information from base-station control apparatus 4 when reporting information sending part 41, carries out for this is reported to information and is loaded into the coding processing on P-CCPCH.When descending separate channel sending part 42 receives and utilizes data that separate channel (DPCH:Dedicated Physical channel: DPCH) sends or when control information, carry out for these data or control information are loaded into the coding processing on DPCH from base-station control apparatus 4.When common down channel sending part 43 receives and utilizes control information that S-CCPCH sends or when multi-medium data, carry out for this control information or multi-medium data are loaded into the coding processing on S-CCPCH from base-station control apparatus 4.

Descending channelizing identification code (Channelization Code) or the scrambler that generates descending use with code generator 44.Modulation portion 45 is utilized the code being generated with code generator 44 by descending, to carrying out diffusion modulation by reporting the signal that information sending part 41, descending separate channel sending part 42 or common down channel sending part 43 export.

D/A transformation component 46 is that modulation signal is transformed to analog signal by the digital signal of being exported by modulation portion 45.Frequency conversion part 47 converts and exports RF signal to the frequency of having carried out the modulation signal after D/A conversion through D/A transformation component 46.Power amplification portion 48 is by the power amplification of RF signal and output to antenna 49.

In the time that antenna 49 receives the faint wireless signal sending over from mobile communication terminal 6, this wireless signal is amplified in low noise enlarging section 50.Frequency conversion part 51 converts and exports RF signal to the frequency of the wireless signal after amplify low noise enlarging section 50.A/D transformation component 52 is that RF signal is transformed to digital signal by the analog signal of being exported by frequency conversion part 51.

Up channelizing identification code or the scrambler that generates up use with code generator 53.Demodulation section 54 utilizes the scrambler being generated with code generator 53 by up, by the RF signal demodulation of being exported by A/D transformation component 52, and utilizes and by the up channelizing identification code generating with code generator 53, the RF signal after demodulation is opened by each channel separation.Up separate channel acceptance division 55 carries out each separate channel channel-decoding and sends to base-station control apparatus 4.Uplink common channel acceptance division 56 carries out common signal channel (RACH:Random Access Channel, Random Access Channel) channel-decoding and sends to base-station control apparatus 4.

Fig. 4 is the structure chart that represents the base-station control apparatus of the 1st execution mode of the present invention, in figure, core network is sent to Return Reception Dept. 61 and carry out to the communication protocol processing of other base-station control apparatus of core network or the RNSAP (Radio Network Subsystem Application Part: Radio Network Subsystem Application Part) etc. of RANAP (Radio Access NetworkApplication Protocol: Radio Access Network application protocol) etc.

Qos parameter mapping portion 62, according to the QoS instruction from core network, obtains the parameter of the wireless channel meeting the demands.Radio Resource control part 63 is carried out the processing relevant to Radio Resource, and carries out control or the parameter notice of mobile communication terminal 6 according to RRC signaling.Wireless link control part 64 is carried out the buffering in wireless link and is retransmitted and control.

Base station is sent to Return Reception Dept. 65 carries out to the communication protocol processing of the base stations (Node-B) such as NBAP (NodeB Application Part:NodeB applying portion).

But the function sharing of base-station control apparatus 4 is logical formula in function, in actual hardware or software installation, might not clearly separate.

Fig. 5 is the key diagram that represents the channel architecture between mobile communication terminal 6 and base station 5, has represented to utilize the channel architecture W-CDMA mode in the example of Fig. 5.But actual channel occupation mode is likely to use in multiple combining channels to channel.

First, the physical channel towards the down direction of mobile communication terminal 6 from base station 5 is described.

For the whole mobile communication terminals 6 that are present in the compass of competency of base station 5, what in the time reporting timing base, use has a CPICH (Common Pilot Channel: Common Pilot Channel), and what in the time notifying other to report information, use has a P-CCPCH (Primary-Common ControlPhysical Channel: basic Common Control Channel).In addition, P-CCPCH is also as reporting information channel BCH (Broadcast channel: broadcast channel).

In addition, what base station 5 was used in the time that each mobile communication terminal 6 sends signaling or data has S-CCPCH (Secondary-Common Control Physical Channel: auxiliary Common Control Channel), and S-CCPCH allows to set many.

Further, there is PICH (Paging Indicatorchannel: Page Indication Channel) as the paging of down direction with instruction.

Next, the channel towards the up direction of base station 5 from mobile communication terminal 6 is described.

There is RACH (Random Access Channel: Random Access Channel) as common signal channel, in addition, there are indivedual DPCH (Dedicated Physical Channel: DPCH) that set in the time communicating with specific mobile communication terminal 6 as the channel that is set in upstream and downstream both direction.DPCH is set in respectively upstream and downstream direction, for the communication of voice and data etc. or the signaling of upper layer.Sometimes also DPCH is divided and be called the part DPDCH (Dedicated Physical Data Channel: Dedicated Physical Data Channel) and the part DPCCH (Dedicated Physical ControlChannel: Dedicated Physical Control Channel) that sends the bit relevant with control that send data.

In addition, DPCH is used separately by terminal, is therefore called as separate channel; Other channels, by the public use of multiple terminals, are therefore called as common signal channel.

Its action is then described.

First, GGSN2 takes out the multi-medium data of the content of being taken care of by service centre 1, and this multi-medium data is sent to SGSN3.

SGSN3 is in the time receiving multi-medium data from GGSN2,1 the above mobile communication terminal 6 that retrieves the distribution services that uses this content, is transferred to the multi-medium data of these contents the base-station control apparatus 4 being connected with the base station 5 that has held these mobile communication terminals 6.

Base-station control apparatus 4 in the time receiving multi-medium data from SGSN3, control base station 5 in case utilize S-CCPCH by multi-medium data from base station 5 points send.

Mobile communication terminal 6 receives from any one base station 5 among multiple base stations 5 and utilizes S-CCPCH channel to divide the multi-medium data sending.

But, even if mobile communication terminal 6 is just positioned in the compass of competency of the base station 5 of distributing multimedia data, for example, when near the situation periphery that is positioned at compass of competency, the electric wave sending out from base station 5 can die down, and the quality of reception can variation.

Near the periphery of compass of competency, the reasons are as follows of the quality of reception variation of S-CCPCH channel.Here, for ease of explanation, suppose as shown in Figure 6, base-station control apparatus 4 is connected with base station B with base station A, and mobile communication terminal 6 is positioned near the periphery of compass of competency of base station A.

In this case, mobile communication terminal 6 is closer with the distance of base station B, and therefore, separate channel DPCH, except being set between mobile communication terminal 6 and base station A, is sometimes also set between mobile communication terminal 6 and base station B.

Between mobile communication terminal 6 and base station A, B, set in the situation of DPCH, utilized data that DPCH sends out from base station A, B and both sides' data are carried out to maximum ratio synthetic by reception, just can improve the quality of reception of these data.

But because common signal channel S-CCPCH is only set between mobile communication terminal 6 and base station A or base station B, so it is synthetic to carry out the data that send out from base station A and base station B maximum ratio each other, its data receiver quality exists the trend of variation.

Therefore, in order to ensure the quality of reception of S-CCPCH, increase the power of distributing to S-CCPCH in base station 5 and send, but, as mentioned above, when having increased base station 5 while distributing to the power of S-CCPCH, the transmitted power of distributing to other channels can reduce relatively, therefore the information quality of reception meeting variation of, utilizing other channels to send.

In the 1st execution mode, the quality of reception of distributing to the power of S-CCPCH and improving S-CCPCH in order not increase base station 5, makes mobile communication terminal 6 have structure as shown in Figure 2.

The following describes the action of the mobile communication terminal 6 of Fig. 2.Fig. 7 and Fig. 8 are the flow charts that represents the contents processing of the mobile communication terminal of the 1st execution mode of the present invention.

Mobile communication terminal 6 likely receives the wireless signal that utilizes S-CCPCH to send out from more than 3 base stations 5, but restricted on the hardware due to the receiving terminal at mobile communication terminal 6, so not using whole base stations 5 as monitored object, and just using possible to a certain extent base station 5 (the large base station 5 of raising possibility of the quality of reception) as monitored object.Here, as shown in Figure 6, suppose using base station A and base station B as monitored object, receive the wireless signal sending out from base station A, B.But, because wireless signal arrives mobile communication terminal 6 from base station A, B through various paths, so being moved communication terminal as multipath signal respectively, the wireless signal sending out from base station A, B receives for more than 6 time.

In addition, multiple base stations 5 and mobile communication terminal 6 between do not set stage of S-CCPCH, as wireless signal, can consider not send at once multi-medium data, but pilot signal transmitted; Also can send at once multi-medium data.

First,, in the time that antenna 11 receives the wireless signal being sent out by base station A or base station B and is multipath signal, this multipath signal is amplified in the low noise enlarging section 12 of mobile communication terminal 6.

In the time that multipath signal is amplified in low noise enlarging section 12, frequency conversion part 13 converts and RF signal is outputed to A/D transformation component 14 frequency of this multipath signal.

In the time receiving analog signal from frequency conversion part 13 and be RF signal, this RF signal is carried out analog/digital conversion by A/D transformation component 14, is that RF signal outputs to the synthetic portion 18 of RAKE and search section 15 by digital signal.

In the time receiving the RF signal of digital signal from A/D transformation component 14, search section 15 detects the transmission source base station 5 of this multipath signal by carrying out cell search process., confirm the multipath signal that received by antenna 11 be send out from base station A or send from base station B.

Particularly, along with the movement of mobile communication terminal 6, multipath signal can be subject to the impact of phasing and change, therefore, search section 15 is set code or the timing etc. of S-CCPCH and is carried out the search (step ST1) of S-CCPCH, thereby calculates the delay curve (profile) etc. (step ST2) of corresponding S-CCPCH (S-CCPCH relevant to base station A, the S-CCPCH relevant with base station B).

Branch road distributes control part 17 to control the synthetic portion 18 of RAKE, makes to retrieve the peak value of the delay curve calculating by search section 15, and multipath signal when this peak value is assigned to the branch road portion (step ST3) of the synthetic portion 18 of RAKE.

Now, the base station 5 of monitored object is that Active Set is base station A, B, therefore, for example, if the transmission source of the multipath signal being received by antenna 11 is not yet to distribute the RF signal of exporting from A/D transformation component 14 on the 18a of branch road portion of the synthetic portion 18 of base station A and RAKE, branch road distributes 17 of control parts to control the synthetic portions 18 of RAKE so that this RF signal (hereinafter referred to as RF signal A-1) is assigned to the 18a of branch road portion.

In addition, if the transmission source of the multipath signal receiving by antenna 11 is to have distributed the RF signal of exporting from A/D transformation component 14 on the 18a of branch road portion of the synthetic portion 18 of base station A and RAKE, control the synthetic portion 18 of RAKE so that this RF signal (hereinafter referred to as RF signal A-2) is assigned to the 18b of branch road portion.

If the transmission source of the multipath signal receiving by antenna 11 is not yet to distribute the RF signal of exporting from A/D transformation component 14 on the 18c of branch road portion of the synthetic portion 18 of base station B and RAKE, branch road distributes 17 of control parts to control the synthetic portions 18 of RAKE so that this RF signal (hereinafter referred to as RF signal B-1) is assigned to the 18c of branch road portion.

In addition, if the transmission source of the multipath signal receiving by antenna 11 is to have distributed the RF signal of exporting from A/D transformation component 14 on the 18c of branch road portion of the synthetic portion 18 of base station B and RAKE, control the synthetic portion 18 of RAKE so that this RF signal (hereinafter referred to as RF signal B-2) is assigned to the 18d of branch road portion.

Code generator 16 generates the scrambler corresponding with the base station 5 detecting by search section 15.For example, if the base station 5 of the transmission source of this multipath signal is base station A, generate the scrambler corresponding with this base station A, if the base station 5 of the transmission source of this multipath signal is base station B, generate the scrambler corresponding with this base station B.

In the time of input rf signal A-1～B-2, the 18a of the branch road portion～18d of the synthetic portion 18 of RAKE utilizes the scrambler being generated by code generator 16 by this RF signal A-1～B-2 demodulation.

In the time that RF signal A-1, A-2 are assigned to the 18a of branch road portion, 18b, it is synthetic that this RF signal A-1 and RF signal A-2 are carried out maximum ratio by the synthetic 18e of portion in the synthetic Bu18 of RAKE community, and this composite signal (hereinafter referred to as composite signal A) is saved in to community input store 19a (step ST4, ST5).

In addition, in the time that RF signal B-1, B-2 are assigned to the 18c of branch road portion, 18d, it is synthetic that this RF signal B-1 and RF signal B-2 are carried out maximum ratio by the synthetic 18f of portion in the synthetic Bu18 of RAKE community, and this composite signal (hereinafter referred to as composite signal B) is saved in to community input store 19b (step ST4, ST5).

In the time that composite signal A is saved in community input store 19a by the synthetic 18e of portion in the synthetic Bu18 of RAKE community, lsb decoder 20 is processed (step ST11, ST12) by the fast decoding (TurboDecode) of carrying out this composite signal A, whereby this composite signal A is decoded and decoded composite signal A is saved in the output storage 21a of community (step ST13).

In addition, in the time that composite signal B is saved in community input store 19b by the synthetic 18f of portion in the synthetic Bu18 of RAKE community, lsb decoder 20, by carrying out the fast decoding processing (step ST11, ST12) to this composite signal B, is decoded this composite signal B decoded composite signal B is saved in the output storage 21b of community (step ST13) whereby.

Selection portion 22 successful composite signal of selective decompression output to common down channel acceptance division 23 from be kept at decoded composite signal A, the B community output storage 21a, 21b.

For example, check the CRC result (step ST14) of decoded composite signal A, B, thereby confirm that this CRC result is normal composite signal.

In addition, selecting a CRC result is normal composite signal (step ST15), and this composite signal is outputed to common down channel acceptance division 23 (step ST16).

In the time that common down channel acceptance division 23 receives the composite signal choosing by selection portion 22, if this composite signal is control information, just this composite signal is outputed to protocol processes portion 26; If this composite signal is application data, this composite signal is outputed to application handling part 27.

When protocol processes portion 26 receives while being the composite signal of control information from common down channel acceptance division 23, carry out the processing relevant to Control on Communication of setting/release or the handing-over etc. of channel according to this control information.

; if the composite signal of exporting from common down channel acceptance division 23 is relevant to the multipath signal sending out from base station A; protocol processes portion 26 just carries out for setting the Control on Communication processing etc. of S-CCPCH between itself and base station A; if the composite signal of exporting from common down channel acceptance division 23 is relevant to the multipath signal sending out from base station B, protocol processes portion 26 just carries out for setting the Control on Communication processing etc. of S-CCPCH between itself and base station B.

Then, search section 15 is searched for the multipath signal of the S-CCPCH setting by protocol processes portion 26, the synthetic portion 18 of RAKE carries out maximum ratio by the multiple multipath signals that search by search section 15 and synthesizes, and this composite signal is saved in community output storage 21a by lsb decoder 20.

As mentioned above by protocol processes portion 26 and base station A or base station B between set S-CCPCH after, when receiving from common down channel acceptance division 23 while being the composite signal of application data, application handling part 27 is just according to conversion process such as these application data execution sound encoding and decoding or image coding and decodings.

In addition, when the decoded composite signal being kept in the output storage 21a of community is to report in the situation of information, because selection portion 22 is not carried out the selection processing of composite signal, receive this composite signal and output to protocol processes portion 26 so report information acceptance division 24.

Even if the decoded composite signal being kept in the output storage 21a of community is application data or control information, the in the situation that of utilizing descending separate channel to send over by base station 5, because selection portion 22 is not carried out the selection processing of composite signal, so descending separate channel acceptance division 25 receives this composite signal, if this composite signal is application data, just this composite signal is outputed to application handling part 27, if this composite signal is control information, just this composite signal is outputed to protocol processes portion 26.

As known from the above, by means of the 1st execution mode, the multipath signal relevant to the wireless signal that utilizes S-CCPCH to send out from multiple base stations 5 distributed to each transmission source base station and by be that multiple multipath signals that same base station 5 is relevant carry out maximum ratio synthetic with transmission source, and by this composite signal decoding, the successful composite signal of selective decompression from this decoded composite signal, due to this structure, can obtain base station 5 and also can improve the effect of the quality of reception of wireless signal without controlling transmitted power.

In addition, what in the 1st execution mode, represent is that the 18a of branch road portion, 18b input relevant RF signal A-1, the A-2 of multipath signal sending out to base station A, and the 18c of branch road portion, 18d input relevant RF signal B-1, the B-2 of multipath signal sending out to base station B; Distribution for the RF signal of the 18a～18d of branch road portion can be also arbitrarily, for example, also can be that the 18a of branch road portion, 18b, 18c input relevant RF signal A-1, A-2, the A-3 of multipath signal sending out to base station A, the 18d of branch road portion inputs the relevant RF signal B-1 of multipath signal sending out to base station B.

In addition, in the 1st execution mode, represent that RAKE synthesizes portion 18 and carried the synthetic 18f of portion in synthetic Bu18eHe community, community, but the synthetic portion in 1 community also can only be carried in the synthetic portion 18 of RAKE, the synthetic portion in this community has the function of the synthetic 18f of portion in synthetic Bu18eHe community, community concurrently.

In addition because the hardware of lsb decoder 20 in general circuit scale is larger, so what represent is to carry out decoding by lsb decoder 20 timesharing to process, but 2 lsb decoders can certainly be installed in the 1st execution mode.

Further, in the 1st execution mode, represent to install 2 community input store 19a, 19b and the example of 2 community output storage 21a, 21b has also been installed, only possessed respectively 1 memory but can certainly be configured to simultaneously.

The 2nd execution mode

Selection portion 22Cong community output storage 21a has been described in above-mentioned the 1st execution mode, the decoded composite signal A preserving in 21b, the successful composite signal of selective decompression output to the example of common down channel acceptance division 23 in B, but as shown in Figure 9, also can be whether the decoded result that for example elder generation is kept at the decoded composite signal A in the output storage 21a of community by selection portion 22 confirmations is good, if this decoded result is good, whether the decoded result of just no longer confirming to be kept at the decoded composite signal B in the output storage 21b of community is good, and decoded composite signal A is outputed to common down channel acceptance division 23 (step ST17, ST18).In addition, if it is not good being kept at the decoded result of the decoded composite signal A in the output storage 21a of community, whether well confirm to be kept at the decoded result of the decoded composite signal B in the output storage 21b of community, if this decoded result is good, just decoded composite signal B is outputed to common down channel acceptance division 23.

By means of the 2nd execution mode, if the decoded result of first confirming is good, just no longer need other the whether good confirmation processing of decoded result, therefore, can obtain the effect that reduces useless processing.

The 3rd execution mode

In above-mentioned the 1st execution mode, represent that Active Set is set as the example of base station A, B, but more new demand unit also can be set, this unit compares mutually to the incoming level of the wireless signal sending out from multiple base stations 5, sends the more new demand of Active Set according to its comparative result.

In addition, the search section 15 of Fig. 2 and agreement control part 26 have formed change request unit.

Figure 10 and Figure 11 are the flow charts that represents the contents processing of the mobile communication terminal of the 3rd execution mode of the present invention.

Next its work is described.

First, in the incoming level of CPICH, there are such as propagation loss (path loss) or CPICHEc/No (1 chip of CPICH suitable energy to noise ratio), CPICH-RSCP (CPICHReceived Signal Code Power: the power of distributing to CPICH code) etc.

Search section 15 obtains the incoming level (step ST21) of the CPICH of the base station 5 not comprising in the current Active Set the base station 5 comprising in Active Set.

Search section 15 obtains after the incoming level of CPICH of these base stations 5, and the incoming level of these CPICH is lined up (step ST22) in order, calculates and appends threshold value Tadd (step ST23).

That is, the incoming level that is included in CPICH minimum in the incoming level of CPICH of the base station 5 in Active Set is used as to X, appends threshold value Tadd according to the incoming level X of this CPICH with for preventing that the discrete lag parameter H of Active Set from calculating.Here, calculate and append threshold value Tadd by search section 15; But also can receive and append threshold value Tadd from upper layer.

Tadd＝X+H/2

Search section 15 confirms whether continue predefined time T (time T is the timer value for eliminating instantaneous variation) and be greater than the above-mentioned incoming level (step ST24) that appends threshold value Tadd in the incoming level of CPICH that is not included in the base station 5 in current Active Set.

Continue predefined time T and be greater than the incoming level that appends threshold value Tadd in the case of existing, whether search section 15 is investigated in Active Set has surplus energy to hold, even if append base station 5 as Active Set, can stand the reception & disposal load (step ST25) of appending in residence; If there is surplus energy to hold in Active Set, determine that carrying out Active Set as follows appends processing.In this case, transfer to the processing of the terminal A of Figure 11.

On the other hand, if do not have surplus energy to hold in Active Set, determine that carrying out Active Set as follows replaces processing.In this case, transfer to the processing of the terminal B of Figure 11.

Continue predefined time T being greater than the incoming level that appends threshold value Tadd in the case of not existing, 15 bases of search section are included in the incoming level X of CPICH minimum in the incoming level of CPICH of the base station 5 in Active Set and lag parameter H and calculate and delete threshold value Tdelete (step ST26).Here, search section 15 calculates deletes threshold value Tdelete, but also can receive and delete threshold value Tdelete from upper layer.

Tdelete＝X-H/2

Search section 15 confirms whether there is the incoming level (step ST24) that continues predefined time T and be less than above-mentioned deletion threshold value Tdelete in the incoming level of the CPICH that is included in the base station 5 in Active Set

In the time having lasting predefined time T and be less than the incoming level of deleting threshold value Tdelete, 15 of search section determine that carrying out Active Sets as follows deletes processing.In this case, transfer to the processing of the terminal C of Figure 11.

On the other hand, continue predefined time T and be less than the incoming level of deleting threshold value Tdelete in the case of not existing, not carrying out the renewal of Active Set and process and finish.

Active Set append processing

Determine appending after processing of execution Active Set when search section 15, protocol processes portion 26 sends appending of Active Set and requires signaling (step ST31) to base station 5.

That is, protocol processes portion 26 requires signaling to output to after up separate channel sending part 29 appending of Active Set, and up separate channel sending part 29 is carried out separate channel processing, and this is appended and requires signaling to output to modulation portion 31.

Modulation portion 31 utilizes appending that the diffuse coding that generates from code generator 30 exports up separate channel sending part 29 to require signaling to carry out diffusion modulation.

D/A transformation component 32 is that modulation signal is transformed to analog signal by the digital signal of exporting from modulation portion 31, frequency conversion part 33 is converted and is exported RF signal by the frequency modulating signal carrying out after digital-to-analog conversion through D/A transformation component 32, and power amplifier 34 will output to antenna 11 after the power amplification of this RF signal.

Thus, appending of Active Set requires signaling to be transferred to base station 5, and base station 5 will be appended and be required signalling to base-station control apparatus 4.

In the situation that base-station control apparatus 4 allows Active Set to append, base station 5 utilizes the DPCH of for example separate channel that the license signaling (comprising the S-CCPCH parameter that newly allows the base station 5 of appending) of appending of Active Set is sent to mobile communication terminal 6.

Append license signaling and similarly receive Active Set from descending separate channel acceptance division 25 with above-mentioned the 1st execution mode and append license signaling when (step ST32) when antenna 11 receives the Active Set sending out from base station 5, the protocol processes portion 26 of mobile communication terminal 6 resolves this signaling content, judges whether to allow append (the step ST33) of Active Set.

Allow Active Set append in the situation that being judged as, protocol processes portion 26 appends with reference to Active Set the S-CCPCH parameter comprising in license signaling and confirm the base station 5 of appending in Active Set, and this base station 5 is appended to (step ST34) in Active Set.

In addition, protocol processes portion 26 notifies this S-CCPCH parameter to search section 15, branch road and distributes control part 17 and the synthetic portion 18 of RAKE.

After, start to comprise the S-CCPCH reception & disposal (step ST35) of the base station 5 of the Active Set of the base station 5 of appending.

The replacement processing of Active Set

In the time that search section 15 is determined the replacement processing of carrying out Active Set, require the situation of signaling the same with sending appending of Active Set, protocol processes portion 26 sends replacement from Active Set to base station 5 requires signaling (step ST41).

Thus, the replacement of Active Set requires signaling to be sent to base station 5, and base station 5 requires signalling to base-station control apparatus 4 replacement.

In the situation that base-station control apparatus 4 allows Active Set to replace, base station 5 utilizes for example DPCH that the replacement license signaling (the S-CCPCH parameter of the base station 5 that comprises new permission increase) of Active Set is sent to mobile communication terminal 6.

In the time that antenna 11 receives the Active Set replacement license signaling sending out from base station 5 and similarly receives Active Set replacement license signaling (step ST42) from descending separate channel acceptance division 25 with above-mentioned the 1st execution mode, the protocol processes portion 26 of mobile communication terminal 6 resolves and judges whether to allow the replacement (step ST43) of Active Set to this signaling content.

In the situation that being judged as the replacement of permission Active Set, the base station that in the base station comprising in current Active Set 5, incoming level is minimum 5 from Active Set, is excluded (step ST44) by protocol processes portion 26.

In addition, protocol processes portion 26 replaces with reference to Active Set the S-CCPCH parameter comprising in license signaling and confirm the base station 5 of appending in Active Set, and this base station 5 is appended to (step ST45) in Active Set.

Further, protocol processes portion 26 notifies this S-CCPCH parameter to search section 15, branch road and distributes control part 17 and the synthetic portion 18 of RAKE.

After, the S-CCPCH reception & disposal (step ST46) of the base station 5 of the Active Set that startup has comprised the base station 5 of replacing.

The deletion processing of Active Set

In the time that search section 15 is determined the deletion processing of carrying out Active Set, require the situation of signaling the same with sending appending of Active Set, protocol processes portion 26 sends the erasure request signaling (step ST51) of Active Set to base station 5.

Thus, the erasure request signaling of Active Set is transferred to base station 5, base station 5 by erasure request signalling to base-station control apparatus 4.

In the situation that base-station control apparatus 4 allows Active Set to delete, base station 5 utilizes for example DPCH that Active Set is deleted to license signaling and sends to mobile communication terminal 6.

In the time that antenna 11 receives the Active Set deletion license signaling sending out from base station 5 and similarly receives Active Set deletion license signaling (step ST52) from descending separate channel acceptance division 25 with above-mentioned the 1st execution mode, the protocol processes portion 26 of mobile communication terminal 6 resolves and judges whether to allow the deletion (step ST53) of Active Set to this signaling content.

In the time being judged as the deletion of permission Active Set, the reception & disposal of the S-CCPCH of the base station that in the base station comprising in current Active Set 5, incoming level is minimum 5 is stopped (step ST54) by protocol processes portion 26, and from Active Set, this base station 5 is excluded to (step ST55).

Figure 12 is the sequence chart that represents the signaling of activating set updating in wireless communication system.Below with reference to Figure 12, the information exchange between mobile communication terminal 6 and base station 5, base-station control apparatus 4 is described.

First,, in the time upgrading Active Set as described above (step ST61), mobile communication terminal 6 utilizes the RACH of common signal channel to send to base station 5 the activating set updating information (step ST62) that represents that Active Set has been updated.

In the time receiving activating set updating information from mobile communication terminal 6, base station 5 by this activating set updating communication to base-station control apparatus 4 (step ST63).

In the time receiving activating set updating information from base station 5, base-station control apparatus 4 is inquired about the S-CCPCH state (step ST64) of the base station 5 newly covering in Active Set., confirm newly to cover that base station 5 in Active Set is current whether is carrying out multimedia service.

In the time newly covering that base station 5 in Active Set is current does not carry out multimedia service, base-station control apparatus 4 just starts multimedia services (step ST66) to these base station 5 instructions.

In addition, base-station control apparatus 4 is obtained S-CCPCH parameter (for example timing, code etc.) or service starting state, starts RRC (Radio Resource Control: Radio Resource control) signaling (step ST67).

Base station 5 receives S-CCPCH parameter from base-station control apparatus 4, for example, utilize the CPICH of common signal channel that S-CCPCH parameter is carried out to signaling transmission (step ST68).

In the time receiving S-CCPCH parameter from base station 5 signalings (step ST69), mobile communication terminal 6 is set this S-CCPCH parameter and is carried out and receives action (step ST70).

As known from the above, by means of the 3rd execution mode, be configured to more new demand unit is set, its incoming level to the wireless signal sending out from multiple base stations 5 compares mutually, send the more new demand of Active Set according to its comparative result, even if therefore can obtain the mobile effect that also can guarantee the quality of reception of wireless signal of mobile communication terminal 6.

In addition, what in the 3rd execution mode, represent is that mobile communication terminal 6 sends to base station 5 example that activating set updating requires, and base station 5 between set separate channel in the situation that, also the Active Set of separate channel can be diverted in common signal channel, in this case, do not need the more new demand of Active Set to send to base station 5.

The 4th execution mode

The example that sends the more new demand of Active Set to be mobile communication terminal 6 carry out mutually relatively to the incoming level of the wireless signal sending out from multiple base stations 5 according to its comparative result to base station 5 representing in above-mentioned the 3rd execution mode, monitored object updating block also can be set, it receives the necessary information of reporting from base station 5 in the time that mobile communication terminal 6 upgrades Active Set, report information updating Active Set with reference to this, base station 5 also can not participate in upgrading.In addition, the search section 15 of Fig. 2 and agreement control part 26 have formed monitored object updating block.

Figure 13 is the sequence chart that the parameter while representing activating set updating in wireless communication system is reported.

First, base-station control apparatus 4 such as, sends to base station 5 (step ST71) using necessary activating set updating information (threshold value etc.) as the information of reporting.

When receiving from base-station control apparatus 4 while reporting information, communication is reported to mobile communication terminal 6 (step ST72) by this in base station 5.

Report the required information of information setting activating set updating (such as threshold value etc.) (step ST73) when receive (step ST73) mobile communication terminal 6 while reporting information from base station 5 with reference to this.

In addition, base-station control apparatus 4 after the information of reporting sends to base station 5, the S-CCPCH state (for example service status, regularly) (step ST75) of inquiry peripheral base station.

Then, base-station control apparatus 4, by synthetic the parameter group of S-CCPCH information element (step ST76), sends to base station 5 (step ST77) using the information element of S-CCPCH as the information of reporting.

When receiving from base-station control apparatus 4 while reporting information, communication is reported to mobile communication terminal 6 (step ST78) by this in base station 5.

When receive (step ST79) while reporting information from base station 5, mobile communication terminal 6 is reported the parameter of information setting S-CCPCH with reference to this and is started to receive (step ST80).

Figure 14 is the flow chart that represents the renewal processing of Active Set in mobile communication terminal 6.But, mobile communication terminal 6 is identical with Figure 11 to the selection of appending processing, replacement processing or deletion processing of Active Set, and therefore description thereof is omitted.

Active Set append processing

The protocol processes portion 26 of mobile communication terminal 6 receives S-CCPCH parameter (service state that comprises S-CCPCH) as reporting information (step ST81) from base station 5.

Protocol processes portion 26 confirms with reference to the service state of the S-CCPCH comprising in S-CCPCH parameter whether the base station 5 corresponding with S-CCPCH parameter is providing service (step ST82).

If the base station 5 corresponding with S-CCPCH parameter providing service, protocol processes portion 26 is just appended to (step ST83) in Active Set by this base station 5.

In addition, protocol processes portion 26 notifies this S-CCPCH parameter to search section 15, branch road and distributes control part 17 and the synthetic portion 18 of RAKE.

After, start to comprise the S-CCPCH reception & disposal (step ST84) of the base station 5 of the Active Set of the base station 5 of appending.

The replacement processing of Active Set

Protocol processes portion 26 receives S-CCPCH parameter (service state that comprises S-CCPCH) as reporting information (step ST85) from base station 5.

Protocol processes portion 26, with reference to the service state of the S-CCPCH comprising in S-CCPCH parameter, confirms whether the base station corresponding with S-CCPCH parameter 5 is providing service (step ST86).

If the base station 5 corresponding with S-CCPCH parameter providing service, protocol processes portion 26 just excludes (step ST87) by the base station that in the base station comprising in current Active Set 5, incoming level is minimum 5 from Active Set.

In addition, the base station corresponding with S-CCPCH parameter 5 is appended to (step ST88) in Active Set by protocol processes portion 26.

Further, protocol processes portion 26 notifies this S-CCPCH parameter to search section 15, branch road and distributes control part 17 and the synthetic portion 18 of RAKE.

After, the S-CCPCH reception & disposal (step ST89) of the base station 5 of the Active Set that startup has comprised the base station 5 of replacing.

The deletion processing of Active Set

The reception & disposal of the S-CCPCH of the base station that in the base station comprising in current Active Set 5, incoming level is minimum 5 is stopped (step ST90) by protocol processes portion 26, and from Active Set, this base station 5 is excluded to (step ST91).

As known from the above, by means of the 4th execution mode, mobile communication terminal 6 is configured in the time upgrading Active Set and receives the necessary information of reporting from base station 5, reports information updating Active Set with reference to this; Due to this structure, move even if just can obtain mobile communication terminal 6 effect that also can guarantee the quality of reception of wireless signal.

In addition, by means of the 4th execution mode, as above-mentioned the 3rd execution mode, mobile communication terminal 6, without sending activating set updating requirement to base station 5, therefore, can obtain the effect of carrying out quickly activating set updating processing than above-mentioned the 3rd execution mode.

In addition, the information relevant to S-CCPCH can be reported once simultaneously to multiple mobile communication terminals 6, on the other hand, do not need again to pass on Active Set to append processing etc. to base station 5, therefore, a lot of in the situation that, can obtain the effect that reduces signaling number in mobile communication terminal 6 quantity.

The 5th execution mode

The example that sends the more new demand of Active Set to be mobile communication terminal 6 carry out mutually relatively to the incoming level of the wireless signal sending out from multiple base stations 5 according to its comparative result to base station 5 representing in above-mentioned the 3rd execution mode; Also can in the time that being compared, the incoming level of the wireless signal sending out from multiple base stations 5 infer in such a way the incoming level of wireless signal.

,, in order to confirm that received power utilize the incoming level of the wireless signal that S-CCPCH sends out, need to, by setting code or the timing of this S-CCPCH and carrying out demodulation, ask for thus the power RSCP that is assigned to this code.

But, carry out code setting in order to obtain in advance S-CCPCH parameter, need to carry out complicated processing.

Therefore, in the 5th execution mode, carry out following methods: base station 5 is notified the power ratio of CPICH (pilot channel) and S-CCPCH (common signal channel) to mobile communication terminal 6 in advance, mobile communication terminal 6 is measured the power of CPICH, the power of inferring out S-CCPCH according to the measured value of the power of this CPICH and above-mentioned power ratio.

Described in specific as follows.

Figure 15 is the sequence chart that represents the notice of the power ratio of CPICH and S-CCPCH.

First, base-station control apparatus 4 is obtained the power ratio (step ST101) of CPICH and the S-CCPCH of each base station 5.

Then, base-station control apparatus 4 sends to base station 5 using the power ratio of the CPICH of each base station 5 and S-CCPCH as the information of reporting.

When receiving from base-station control apparatus 4 while reporting information, communication is reported to mobile communication terminal 6 (step ST102) by this in base station 5.

Mobile communication terminal 6 is measured the power of the CPICH of each base station 5, when receiving (step ST103) while reporting information from base station 5 with reference to this power ratio of reporting information the power of the CPICH of each base station 5 being multiplied by this CPICH and S-CCPCH, be converted into the power (step ST104) of S-CCPCH.

Figure 16 is the flow chart that represents the renewal processing of Active Set in mobile communication terminal.

The search section 15 of mobile communication terminal 6 receives the CPICH of each base station 5 and the power ratio of S-CCPCH as reporting information (step ST111) from base station 5.

Search section 15 is measured power, as the incoming level (step ST112) of the CPICH of the base station 5 not comprising in the current Active Set the base station 5 comprising in Active Set.

Search section 15 is multiplied by the power of the CPICH of each base station 5 power ratio of this CPICH and S-CCPCH, is converted into the power (step ST113) of S-CCPCH.

Search section 15 relatively represents the power of the incoming level of S-CCPCH in each base station 5, and by the incoming level of these S-CCPCH line up in order (step ST114).

The incoming level that is included in S-CCPCH minimum in the incoming level of S-CCPCH of the base station 5 in Active Set is used as X by search section 15, appends threshold value Tadd according to the incoming level X of this S-CCPCH with for preventing that the discrete lag parameter H of Active Set from calculating.

Tadd＝X+H/2

Here be that search section 15 calculates and appends threshold value Tadd, but also can receive and append threshold value Tadd from upper layer.

When calculating in the manner described above while appending threshold value Tadd, search section 15 is transferred to the processing of the step ST24 of Figure 10.Later identical with above-mentioned the 1st execution mode, therefore the description thereof will be omitted.

As known from the above, by means of the 5th execution mode, receive in advance the information of the power ratio that represents CPICH and S-CCPCH from multiple base stations 6, according to the incoming level of the wireless signal that utilizes CPICH to send out from multiple base stations 5 and this power ratio, infer out the incoming level that utilizes the wireless signal that S-CCPCH sends out from multiple base stations 5, the effect of this structure is: obtain the go forward side by side complex process of line code setting etc. of S-CCPCH parameter without execution and just can obtain the incoming level that utilizes the wireless signal that S-CCPCH sends out from multiple base stations 5.With the difference of base station 5 different, because it can omit the code setting of One's name is legion, used especially effective at the transmission level of S-CCPCH.

As mentioned above, when wireless communication system of the present invention is applicable to utilize S-CCPCH to send multi-medium data simultaneously in multiple base stations, thereby mobile communication terminal need to select the base station of the most applicable multi-medium data reception to improve the situation of the quality of reception of multi-medium data.

Claims (1)

1. a communication system, relates to multimedia broadcasting and multicast services that same multi-medium data is distributed to the multiple terminals in communication system, it is characterized in that, described communication system has:

Base station, the information of the power ratio between the power to the Secondary Common Control Physical Channel receiving from base-station control apparatus and the power of Common Pilot Channel sends, wherein, this Secondary Common Control Physical Channel is in each predetermined cell, described many coal bodies data being distributed, and this Common Pilot Channel sends the information of timing base for predetermined cell described in each; With

Mobile communication terminal, comprising:

Search section, receive the information of the power ratio sending from base station, obtain the power of described Common Pilot Channel, the power of described Common Pilot Channel is multiplied by described power ratio and is converted into the power of described Secondary Common Control Physical Channel, and arrange in order the power of described Secondary Common Control Physical Channel, pay thereby order is carried out in multiple communities; And

Protocol processes portion,

The Secondary Common Control Physical Channel parameter that comprises described Secondary Common Control Physical Channel service state in predetermined cell described in each is received, and

The information of the order determining based on described search section and predetermined threshold value and the described Secondary Common Control Physical Channel parameter receiving in described protocol processes portion, carry out Active Set and append processing, Active Set replacement processing or Active Set deletion processing, thereby renewal Active Set, obtaining mobile communication terminal can be from the set of multiple communities of its receiving multimedia broadcast and multicast services.