CN1968540B - Cellular system, base station and travelling carriage and communication control method - Google Patents

Cellular system, base station and travelling carriage and communication control method Download PDF

Info

Publication number
CN1968540B
CN1968540B CN200610170652.5A CN200610170652A CN1968540B CN 1968540 B CN1968540 B CN 1968540B CN 200610170652 A CN200610170652 A CN 200610170652A CN 1968540 B CN1968540 B CN 1968540B
Authority
CN
China
Prior art keywords
base station
travelling carriage
grouping
power
channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN200610170652.5A
Other languages
Chinese (zh)
Other versions
CN1968540A (en
Inventor
高野奈穗子
滨边孝二郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2002132224A external-priority patent/JP4423836B2/en
Application filed by NEC Corp filed Critical NEC Corp
Publication of CN1968540A publication Critical patent/CN1968540A/en
Application granted granted Critical
Publication of CN1968540B publication Critical patent/CN1968540B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

Before packet signal sends, the target SIR (S12) that UL DPCH is improved in base station (BS1) is sent in grouping, improve with the transmitted power (S13) of the TPC of DL DPCH transmission, while improving the reference power of power-balance, improve the transmitted power (S14) of DL DPCH.In travelling carriage (MS3), in grouping receives, only send the transmitted power (S15) of the TPC control ULDPCH of base station 1 with grouping.Thus, improve the quality of reception of HS-DPCCH in base station 1 comprising ACK/NACK, thus reduce the error rate of ack/nack signal.

Description

Cellular system, base station and travelling carriage and communication control method
The divisional application being entitled as the patent application No.03807558.X (PCT/JP2003/004290) of " cellular system, base station and travelling carriage and communication control method " in the application to be the applying date be on April 03rd, 2003.
Technical field
The present invention relates to cellular system, base station and travelling carriage and communication control method.
Background technology
In the past, this cellular system was proposed there is various system.Recently, as one of this cellular system, propose by 3GPP (third generation partnership projects) cellular system that high-speed downlink packet accesses (HSDPA:High-Speed Downlink Packet Access) mode.
Below, for the cellular system carrying out packet communication, be described for the cellular system of above-mentioned HSDPA mode, but the present invention is not limited to HSDPA.
In HSDPA mode, by high-speed data transfer to the down link from the base station of cellular system to travelling carriage, and then, for carrying out employing High-Speed Physical Downlink Shared Channel (HS-PDSCH:High-Speed Physical Downlink SharedChannel) from base station to the transmission of the down link of travelling carriage.This HS-PDSCH is for carrying out data transmission from each base station to multiple travelling carriage, therefore, the timetable carrying out data transmission to each in multiple travelling carriage determined by base station and control station thereof, sends data by each travelling carriage with the different moment (time division way).
For the data controlled from described base station to travelling carriage send, each base station sets dedicated channel DPCH (DPCH) between each of multiple travelling carriage.This DPCH is used to be sent control information to travelling carriage from base station by this down link signal, is transmitted control signal by uplink signal from travelling carriage to base station simultaneously.
In each travelling carriage, utilize the time scale of HS-PDSCH transmission data little, even if but under the data latency state not sending data, and also continue between base station to set DPCH, when asking to send data, just can start data at short notice and sending.Therefore, the travelling carriage that data transmission is carried out in each base station simultaneously only has one at synchronization, and most travelling carriage is in data latency state, and sets DPCH between base station.
In addition, there is technology in the cellular system that be called soft handover, travelling carriage and multiple base station can be made simultaneously to set channel.Each base station is to specify that power sends common pilot signal, the base station sets DPCH that the transmitted power of travelling carriage and common pilot signal is maximum, but in soft-handoff, when other base stations that the difference of the transmitted power that there is common pilot signal is very little, also with other base station sets DPCH, thus with multiple base station sets DPCH.In the following description, the base station setting DPCH so is in soft-handoff called connection base station.
In addition, the technology being called fast closed-loop transmission power control is applied in the cellular system.This fast closed-loop transmission power control is applicable to both its up link and down link for DPCH.In the transmission power control of the up link of DPCH, base station uses the dedicated pilot signal be comprised in uplink signal to receive SIR (signal-to-jamming ratio) to measure it, and this measured value and predetermined target SIR is made comparisons.Then, when this measured value is less than target SIR, inform to travelling carriage by representing that TPC (transmitting power control) bit of power increase is included in the down link signal of DPCH; In addition travelling carriage is informed to by representing that the TPC bit of power minimizing is included in the down link signal of DPCH time.Then, travelling carriage receives this TPC bit, and increases and decreases transmitted power according to this TPC bit.
When utilizing the transmission power control of up link while soft handover, travelling carriage receives TPC bit from each station of multiple connection base station, when at least one TPC bit represents that power reduces, the transmitted power of DPCH is reduced, in addition time (namely, when all TPC bit all represent that power increases), the transmitted power of DPCH is increased.By carrying out this transmission power control, connect in base station at least one, while the quality of reception of uplink signal meets target SIR, in all connection base stations, can both prevent the quality of reception of uplink signal from exceeding target SIR, the interference wave power of up link is not increased.
On the other hand, in the transmission power control of the down link of DPCH, travelling carriage utilizes the dedicated pilot signal be included in down link signal to measure this reception SIR, and by this measured value compared with predetermined target SIR.Then, when this measured value is less than target SIR, inform to base station by representing that the TPC bit of power increase is included in the uplink signal of DPCH; In addition base station is informed to by representing that the TPC bit of power minimizing is included in the uplink signal of DPCH time.Then, base station receives this TPC bit, and increases and decreases transmitted power according to this TPC bit.
When utilizing the transmission power control of down link while soft handover, travelling carriage receives the down link signal of DPCH from each station of multiple connection base station and is synthesized, and the reception SIR of the down link signal after synthesis is determined TPC bit compared with target SIR.Then, send common TPC bit to multiple connection base station, each station connecting base station increases and decreases transmitted power according to this TPC bit.So, transmitted power is increased and decreased according to common TPC bit by all connection base stations, the equilibrium of the transmitted power connected between base station can be kept, the down link signal that the connection base station making transmission loss between the mobile station minimum sends can be moved platform with good quality reception, thus can prevent the transmitted power of down link signal be increased to required more than, the interference wave power of down link is not increased.
Transmission power control described above and soft handover are as wireless access way, particularly in the cellular system of CDMA (code division multiple access) mode, reducing interference wave power for by reducing transmitted power thus capacity of trunk is increased, is a kind of effective technology.
Here, among soft handover, as in Figure 10 to shown in system outline, above-mentionedly illustrated that travelling carriage (MS) 3 connects DPCH with multiple base station (BS) 1,2 that is connected simultaneously, but HS-PDSCH is only connected with a base station (being base station 1 in the drawings).In addition, as mentioned above, travelling carriage 3 needs to represent that whether free of errors have received receiving of the grouping sended over by this HS-PDSCH confirms that notice (ACK/NACK: confirm/do not confirm) information sends to base station, and this receives and confirms that announcement information uses the HS-DPCCH (High-Speed Dedicated Physical Control Channel: the HS-PDSCH Dedicated Control Channel sent control information comprising grouping) of up link to send.
Relation between the HS-DPCCH of this up link and the DPCH of up link as shown in figure 11, DPCH is made up of DPCCH (Dedicated Physical Control Channel) and DPDCH (Dedicated Physical Data Channel), and DPCCH comprises dedicated pilot (channel) (Pilot), TPC bit and FBI (feedback information).In addition, DPDCH is data (Data), comprises user profile and control information.This DPCCH and DPDCH is orthogonal to each other and modulates and be sent out away after demultiplexing.
HS-DPCCH is divided into the slot length being equivalent to DPCCH or DPDCH tri-times of time slots, and previously described receiving confirms notice (ACK/NACK) information and represent that the CQI (channel quality instruction) of downlink quality is included.This HS-DPCCH and DPCH is sent out with Code Division Multiplex.In addition, to the judgement of the ACK be contained in this HS-DPCCH (reception)/NACK (no) signal, only in the base station sending HS-PDSCH, namely grouping sends in base station and carries out, therefore does not carry out assembling dividing between base station.
On the other hand, as shown in Figure 10, the DPCH of up link is in radio network controller (RNC) 10, carry out connecting and assemble dividing between base station 1,2, simultaneously, this DPCH is described above, controls it as predetermined transmission quality by fast closed-loop transmission power control, and the transmitted power PH of HS-DPCCH is the power transmission obtained to add predetermined offset power Δ on the transmitted power PD of this DPCH.That is, send with following relation:
PH＝PD+Δ (1)。
So, utilize HS-PDCCH, based on the ACK/NACK sent from travelling carriage, grouping sends base station and judges whether to be properly received grouping at travelling carriage, as being judged as NACK, then think that its corresponding travelling carriage that is grouped in is not received correctly, again carry out the transmission of this grouping, to prevent packet loss.
Here, particularly when NACK erroneous judgement is decided to be ACK, even if grouping is not correctly received, this base station also can send next grouping, and thus, that grouping be not correctly received would not be sent again, but lost at travelling carriage, thus there is packet loss.Therefore, the reception error rate that the reception error rate for NACK must be compared to ACK is abundantly little, in other words, needs fully to improve the quality of reception sending the ack/nack signal of base station in grouping.
But if do not take what countermeasure, due to action as described below, the quality of reception of ACK/NACK can reduce.
In soft handover runs, the transmitted power as UL (Up-Link: the up link) DPCH of the transmitted power benchmark of HS-DPCCH is controlled as follows.When the reception SIR of UL DPCH is larger than benchmark SIR, connect base station and send the TPC signal that power is reduced, and when the reception SIR after synthesizing is less than benchmark SIR, it sends the TPC signal that power is increased.
In addition, the operating travelling carriage of soft handover receives TPC signal from each connection base station, and when all TPC signals are all power increase, transmitted power is increased, and when being power minimizing having a TPC signal at least, transmitted power is reduced.Now, although the reception SIR that grouping sends the UL DPCH of base station does not reach benchmark SIR, if but the reception SIR of the UL DPCH of base station is in addition more than benchmark SIR, then owing to relative at least one TPC signal of travelling carriage being power minimizing, so travelling carriage makes the transmitted power of UL DPCH reduce, and the reception SIR that grouping sends the UL DPCH of base station can reduce further.Therefore, the quality of reception of HS-DPCCH reduces.
So, in soft-handoff, because grouping sends the TPC signal beyond base station, the quality of reception that there is HS-DPCCH reduces, thus easily produces the problem of the reception error of ACK/NACK.
In soft handover runs, control the transmitted power of DL (Down-Link: the down link) DPCH containing TPC signal as following, wherein, this TPC signal is the transmitted power for control UL DPCH.The DLDPCH that the synthesis of soft handover operating travelling carriage sends from each connection base station, and reception SIR in post synthesis larger than benchmark SIR time, send the TPC signal that power is reduced, and reception SIR in post synthesis less than benchmark SIR time, send the TPC signal that power is increased, each base station controls transmitted power according to this TPC signal.
Now, although the reception SIR that grouping sends the DL DPCH of base station is less than benchmark SIR, if but the reception SIR of the DL DPCH of base station is in addition large, then because the reception SIR after synthesis is larger than benchmark SIR, each base station makes the transmitted power of DL DPCH reduce, and the reception SIR that grouping sends the DL DPCH of base station reduces further.Therefore, the quality of reception reduction of the TPC signal that base station sends is sent from grouping, so the reception error of TPC signal will increase.Now, because grouping sends base station, the reception SIR of UL DPCH is increased, even if so travelling carriage sends the TPC signal making transmitted power increase, also can due to the mistake of this TPC signal, and the reception SIR that there is UL DPCH reduces, the quality of reception of HS-DPCCH reduces correspondingly, easily produces the problem of the reception error of ACK/NACK.
Particularly, in each base station, owing to producing the reception error of TPC signal, the transmitted power that grouping sends the DL DPCH of other base stations of transmission power ratio of the DL DPCH of base station is little, thus the problems referred to above become easy generation.
Mode in the past for improving above problem is known to following two kinds of methods.
First method is, has increase when travelling carriage makes the offset power Δ value of HS-DPCCH when soft changing state than in non-sho state.In the method, due to suitable Δ according to connect base station number, send the UL quality of reception etc. of the link of grouping and different, so the problem that the incremental raio of optimum Δ is more difficult is determined in existence.In addition, in order to make the reception error rate of ACK/NACK enough little, just need to make Δ value enough large, thus the transmitted power of up link arrive greatly required more than, there is the consumed power of increase travelling carriage, also increase the shortcoming of the interference wave power of up link simultaneously.
In addition, because the transmission power ratio DPCCH of HS-DPCCH is large, so the quality of reception that there is the pilot signal of DPCCH reduces, and channel infers the shortcoming that precision reduces.For eliminating above-mentioned shortcoming, also considering to apply pilot signal to HS-DPCCH, but owing to often sending the pilot signal be only used in soft handover, there is the problem of the service efficiency reducing resource.
Second method is, in soft handover (SHO), grouping sends base station generates rapid closed-loop control formula transmission power control signal TPC-HS relative to the quality of reception of HS-DPCCH, to replace common TPC signal, or the two is all sent to travelling carriage.In the method, meeting ack signal, NACK signal quality for sending in base station in grouping, must make to require quality more strictly target setting SIR.Therefore, there is the shortcoming consuming excessive transmission signal.In addition, when sending TPC-HS when replacing common TPC, the power of HS-DPCCH rises and produces interference, and consequently, the channel that there is the DPCCH of other channels infers the shortcoming that precision reduces.In addition, when sending the TPC-HS different from common TPC, need to change time slot format.
The object of this invention is to provide a kind of cellular system, this system can solve above-mentioned existing issue, and in base station, can receive send from travelling carriage to base station, receive confirmation notice for dividing into groups ack/nack signal with high-quality.
Summary of the invention
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and be in soft hand-off state with described travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described cellular system is, described travelling carriage has transmission control device, described device is in described grouping bag receiving course, the transmission power control of special uplink channel is only carried out according to the transmission power control information be contained in downlink dedicated channels sending base station from described grouping bag.In addition, the feature of described cellular system is also, grouping bag sends base station to be had in described grouping bag process of transmitting, controls the intended recipient quality of described dedicated channel in this base station changes into second value larger than it device from the first value; The feature of described cellular system is also, the amplification of the transmitted power of described special uplink channel is set as larger than the range of decrease by described transmission control device.
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described cellular system is, grouping bag sends base station and has in described grouping bag process of transmitting, the transmitted power controlling the transmission power control information be contained in downlink dedicated channels changes into the device of second value larger than it from the first value.
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, between the base station utilizing reference power to carry out being in described soft hand-off state, the balance of the transmitted power of described dedicated channel, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described cellular system is, grouping bag sends base station and has in described grouping bag process of transmitting, control described reference power value changes into the second larger value device from the first value.In addition, the feature of described cellular system is also, described grouping bag sends base station to be had for while the described reference power value of increase, and the transmitted power controlling downlink dedicated channels changes into larger device.
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described cellular system is, described travelling carriage has in described grouping bag receiving course, control the intended recipient quality of described dedicated channel in this travelling carriage changes into second value larger than it device from the first value.
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, it is characterized in that, described travelling carriage has in described grouping bag receiving course, the device of the described power control information of downlink dedicated channels is only generated according to the quality of reception of described dedicated channel in this travelling carriage sending base station from grouping bag.
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and be in soft hand-off state with described travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping to wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation announcement information containing described grouping bag is sent to grouping bag transmission base station, the feature of described cellular system is, described travelling carriage has offset power determining device, this device determines the increment of described offset power according to the quality of reception of the down link of each base station in described soft handshaking.
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping to wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation announcement information containing described grouping bag is sent to grouping bag transmission base station, the feature of described cellular system is, described travelling carriage has offset power determining device, this device determines the increment of described offset power according to the number N of each base station in described soft handshaking.
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping to wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation notice (ACK/NACK) information containing described grouping bag is sent to grouping bag transmission base station, the feature of described cellular system is, grouping bag sends base station and has grouping bag transmission control device, this device according to described in receive and confirm that the transmission that the confidence level of judged result of notice carries out described grouping bag controls.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described communication control method is, there is in described travelling carriage transmission power control step, this step is in described grouping bag receiving course, the transmission power control of special uplink channel is only carried out according to the transmission power control information be contained in downlink dedicated channels sending base station from described grouping bag.In addition, the feature of described communication control method is also, sends in base station and has in described grouping bag process of transmitting, control the intended recipient quality of described dedicated channel in this base station changes into second value larger than it step from the first value at grouping bag; The feature of described communication control method is also, the amplification of the transmitted power of described special uplink channel is set as larger than the range of decrease by described transmission power control step.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described communication control method is, sending at grouping bag has in described grouping bag process of transmitting in base station, the transmitted power controlling the transmission power control information be contained in downlink dedicated channels changes into the step of second value larger than it from the first value.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, reference power is utilized to carry out the balance of the transmitted power of the described dedicated channel be between the base station of described soft hand-off state, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, it is characterized in that, sending at grouping bag has in described grouping bag process of transmitting in base station, control described reference power value changes into the second larger value step from the first value.In addition, the feature of described communication control method is also, send in base station at described grouping bag and have while the described reference power value of increase, the transmitted power controlling downlink dedicated channels changes into larger step.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, it is characterized in that, have in described travelling carriage in described grouping bag receiving course, control the intended recipient quality of described dedicated channel in this travelling carriage changes into second value larger than it step from the first value.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, it is characterized in that, have in described travelling carriage in described grouping bag receiving course, the step of the described power control information of downlink dedicated channels is only generated according to the quality of reception of described dedicated channel in this travelling carriage sending base station from grouping bag.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping to wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation announcement information containing described grouping bag is sent to grouping bag transmission base station, the feature of described communication control method is, there is offset power determining step in described travelling carriage, this step determines the increment of described offset power.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping to wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation announcement information containing described grouping bag is sent to grouping bag transmission base station, it is characterized in that, there is offset power determining step in described travelling carriage, this step determines the increment of described offset power.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping to wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation notice (ACK/NACK) information containing described grouping bag is sent to grouping bag transmission base station, the feature of described communication control method is, send in base station to have to divide into groups to wrap at grouping bag and send rate-determining steps, this step is that the confidence level receiving the result of determination confirming notice described in basis carries out described transmission control of dividing into groups to wrap.
According to the present invention, a kind of base station can be obtained, this base station is that the grouping bag in following cellular system sends base station, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described base station is, have in described grouping bag process of transmitting, control the intended recipient quality of described dedicated channel in this base station changes into second value larger than it device from the first value.
According to the present invention, a kind of base station can be obtained, this base station is that the grouping bag in following cellular system sends base station, described cellular system comprises travelling carriage, and be in soft hand-off state with described travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described base station is, have in described grouping bag process of transmitting, the transmitted power of the transmission power control information be contained in downlink dedicated channels is changed into the device of second value larger than it from the first value.
According to the present invention, a kind of base station can be obtained, this base station is that the grouping bag in following cellular system sends base station, described cellular system comprises travelling carriage, and be in soft hand-off state with described travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, between the base station utilizing reference power to carry out being in described soft hand-off state, the balance of the transmitted power of described dedicated channel, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described base station is, have in described grouping bag process of transmitting, control described reference power value changes into the second larger value device from the first value.In addition, the feature of described base station is also, send base station at described grouping bag and also have for while the described reference power value of increase, the transmission power value controlling downlink dedicated channels changes into the device of the second larger value from the first value.
According to the present invention, a kind of base station can be obtained, this base station is that the grouping bag in following cellular system sends base station, described cellular system comprises travelling carriage, and be in soft hand-off state with described travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping and wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation notice (ACK/NACK) information containing described grouping bag is sent to grouping bag transmission base station, the feature of described base station is, there is grouping bag transmission control device, this device according to described in receive and confirm that the transmission that the confidence level of result of determination of notice carries out described grouping bag controls.
According to the present invention, a kind of travelling carriage can be obtained, this travelling carriage is the travelling carriage in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described travelling carriage is, there is transmission control device, this device is in described grouping bag receiving course, the transmission power control of special uplink channel is only carried out according to the transmission power control information be contained in downlink dedicated channels sending base station from described grouping bag.In addition, the feature of described travelling carriage is also, the amplification of the transmitted power of described special uplink channel is set as larger than the range of decrease by described transmission control device.
According to the present invention, a kind of travelling carriage can be obtained, this travelling carriage is the travelling carriage in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with described travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described travelling carriage is, have in described grouping bag receiving course, control the intended recipient quality of described dedicated channel in this travelling carriage changes into second value larger than it device from the first value.
According to the present invention, a kind of travelling carriage can be obtained, this travelling carriage is the travelling carriage in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with described travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, mutually containing the transmission power control information for other dedicated channels in these dedicated channels, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel to carry out grouping to wrap and send, the feature of described travelling carriage is, have in described grouping bag receiving course, the device of the described power control information of downlink dedicated channels is only generated according to the quality of reception of described dedicated channel in this travelling carriage sending base station from grouping bag.
According to the present invention, a kind of travelling carriage can be obtained, this travelling carriage is the travelling carriage in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with this travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping to wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation announcement information containing described grouping bag is sent to grouping bag transmission base station, the feature of described travelling carriage is, there is offset power determining device, this device determines the increment of described offset power according to the quality of reception of the down link of each base station in described soft handshaking.
According to the present invention, a kind of travelling carriage can be obtained, this travelling carriage is the travelling carriage in following cellular system, described cellular system comprises travelling carriage, and be in soft hand-off state with described travelling carriage and set multiple base stations of dedicated channel with described travelling carriage, in the base station being in soft hand-off state, only have certain base station and described travelling carriage to set shared channel (HS-PDSCH) to carry out grouping to wrap and send, described travelling carriage to add the transmitted power of gained after predetermined migration power in the transmitted power of special uplink channel, the HS-PDSCH Dedicated Control Channel (HS-DPCCH) receiving confirmation announcement information containing described grouping bag is sent to grouping bag transmission base station, it is characterized in that of described travelling carriage, there is offset power determining device in described travelling carriage, this device determines the increment of described offset power according to the number N of each base station in described soft handshaking.
According to the present invention, a kind of cellular system can be obtained, this cellular system comprises travelling carriage, and set the base station of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, containing the transmission power control information for dedicated channel in downlink dedicated channels, special uplink channel is made up of Dedicated Control Channel (DPCCH) and specific information channel (DPDCH), described base station and described travelling carriage set shared channel (HS-PDSCH) to carry out grouping and wraps and send, described travelling carriage to add the transmitted power of the first predetermined deviant gained in the transmitted power of uplink dedicated control channel, send base station to grouping bag and send specific information channel, the feature of described cellular system is, described travelling carriage has transmitted power restraining device, this device is according to the transmitted power of described transmission power control information control DPCCH, when to add the transmitted power of the first predetermined deviant gained to send DPDCH in the transmitted power of DPCCH, when the transmitted power of the signal containing DPCCH and DPDCH exceedes predetermined maximum transmit power, suppress the transmitted power of DPDCH.
According to the present invention, a kind of communication control method can be obtained, the method is the communication control method in following cellular system, described cellular system comprises travelling carriage, and set the base station of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, containing the transmission power control information for dedicated channel in downlink dedicated channels, special uplink channel is made up of Dedicated Control Channel (DPCCH) and specific information channel (DPDCH), described base station and described travelling carriage set shared channel (HS-PDSCH) to carry out grouping and wraps and send, described travelling carriage to add the transmitted power of the first predetermined deviant gained in the transmitted power of uplink dedicated control channel, send base station to grouping bag and send specific information channel, the feature of described communication control method is, there is the step of the transmitted power according to described transmission power control information control DPCCH in described travelling carriage, with to add that in the transmitted power of DPCCH the transmitted power of the first predetermined deviant gained is to send DPDCH, when the transmitted power of the signal containing DPCCH and DPDCH exceedes predetermined maximum transmit power, suppress the step of the transmitted power of DPDCH.
According to the present invention, a kind of travelling carriage can be obtained, this travelling carriage is the travelling carriage in following cellular system, described cellular system comprises travelling carriage, and set the base station of dedicated channel with described travelling carriage, described dedicated channel has up and downlink dedicated channels, containing the transmission power control information for dedicated channel in downlink dedicated channels, special uplink channel is made up of Dedicated Control Channel (DPCCH) and specific information channel (DPDCH), described base station and described travelling carriage set shared channel (HS-PDSCH) to carry out grouping and wraps and send, described travelling carriage to add the transmitted power of the first predetermined deviant gained in the transmitted power of uplink dedicated control channel, send base station to grouping bag and send specific information channel, the feature of described travelling carriage is, there is transmitted power restraining device, this device is according to the transmitted power of described transmission power control information control DPCCH, to add that in the transmitted power of DPCCH the transmitted power of the first predetermined deviant gained is to send DPDCH, when the transmitted power of the signal containing DPCCH and DPDCH exceedes predetermined maximum transmit power, suppress the transmitted power of DPDCH.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the cellular system adopting embodiments of the invention;
Fig. 2 is the precedence diagram of the action representing the first embodiment of the present invention;
Fig. 3 is the block diagram of the base station in embodiments of the invention;
Fig. 4 is the block diagram of the travelling carriage in embodiments of the invention;
Fig. 5 is the precedence diagram of the action representing the second embodiment of the present invention;
Fig. 6 is the flow chart of the action of the travelling carriage represented in the third embodiment of the present invention;
Fig. 7 is the flow chart of the action of the base station represented in the 3rd, the 4th embodiment of the present invention;
Fig. 8 is the flow chart of the action of the travelling carriage represented in the fourth embodiment of the present invention;
Fig. 9 is the flow chart of the action of the travelling carriage represented in the fifth embodiment of the present invention;
Figure 10 is the schematic diagram for illustration of the general action in cellular system;
Figure 11 is the format chart for illustration of relation between UL DPCH and the HS-DPCCH in HSDPA mode.
Embodiment
With reference to the accompanying drawings, the of the present invention first to the 5th embodiment is described.Fig. 1 is the general schematic view of an example of the cellular system that the of the present invention first to the 5th embodiment is all suitable for.With reference to this figure, cellular system comprises base station 1, base station 2, travelling carriage 3,4,5.And, base station 1 is arranged in different communities from base station 2.In addition, in this example, although be illustrated the situation that there are two base stations 1,2 relative to three travelling carriages 3,4,5, be not limited thereto, be equally also applicable to the situation that there are more than three base stations relative to three travelling carriages 3,4,5.In general, there is multiple travelling carriage relative to a base station.
In addition, the present invention is also applicable to the situation that there are more than four travelling carriages in this transmitting system, and the situation of existence three travelling carriages 3,4,5 illustrates as an example by this figure.
In addition, as the wireless access way between base station and travelling carriage 3,4,5, CDMA (code division multiple access) mode can be adopted.
The figure shows and send HS-PDSCH signal, DPCH1 (DL:Down-Link: from base station to the transmission of travelling carriage) signal and CPICH1 (common pilot signal 1) signal from base station 1 to travelling carriage 3; DPCH1 (UL:Up-Link: from travelling carriage to the transmission of base station) signal is sent from travelling carriage 3 to base station 1.In addition, also show HS-DPCCH (UL) signal sent from travelling carriage 3 to base station 1 as shown in figure 11.
Equally, show and send DPCH2 (DL) signal and CPICH2 signal from base station 2 to travelling carriage 3; DPCH2 (UL) signal is sent to base station 2 from travelling carriage 3.This DPCH2 (UL), although different from the base station that DPCH1 (UL) receives, as the transmission signal of travelling carriage, is identical with DPCH1 (UL).That is, show HS-DPSCH signal and CPICH signal is one way signal, DPCH signal is two-way signaling.
HS-PDSCH is IA High Speed Channel, for receiving and dispatching the mass files such as animation with the short time.In addition, CPICH is Common Pilot Channel (just DL), by this channel from base station 1,2 to the full-time transmission common pilot signal of travelling carriage 3.
In addition, DPCH is special (physics) channel (UL and DL), and as shown in figure 11, it is made up of DPCCH and DPDCH.In addition, as mentioned above, comprise the CQI etc. of the transmission path line mass of ack/nack signal and expression down link at HS-DPCCH, the relation of the transmitted power between this DPCCH and HS-DPCCH, as shown in previous formula (1).
Then, all common actions of the first to the 5th embodiment are described.Each base station 1,2 sends CPICH1,2 respectively, and this CPICH presses each community by different scramble sign extended, thus each travelling carriage carries out the identification of community by the difference of scramble symbol.Each travelling carriage, when receiving downlink data, sets one or more base station and DPCH (UL/DL), becomes data latency state.
When between base station 1,2, the difference of the received power of CPICH is below predetermined value, a travelling carriage 3 not only sets DPCH with base station 1 but also with base station 2, becomes the state (soft handover) setting DPCH with multiple base station 1,2.
In the DPCH of UL and DL, containing the dedicated pilot signal (Pilot) be made up of the bit series specified.The DPCH transmitted power of UL is controlled by fast closed-loop transmission power control, and in this control, base station utilizes the dedicated pilot signal of the DPCH of UL to measure the reception SIR of DPCH, and the target SIR that this measured value and this base station have is compared.Then, when this measured value is less than target SIR, utilizes the DPCH1 of DL, 2 that the TPC bit of " power increase " is informed to travelling carriage 3, time in addition, the TPC bit of " power reduction " is informed to travelling carriage 3.In addition, the value of this target SIR sends from radio network controller RNC (10 Figure 10).
It is than DPCH channel at a high speed that each base station sends HS-PDSCH, this HS-PDSCH, sends with the power larger than the DPCH of DL.Each base station uses a HS-PDSCH to send data to multiple travelling carriage.The timetable carrying out data transmission to each travelling carriage is determined in RNC or base station, thus carries out data transmission to each travelling carriage with different timetables.That is, give an example, first carry out the transmission of HS-PDSCH to travelling carriage 3, after this transmission terminates, carry out the transmission of HS-PDSCH to travelling carriage 4, after this transmission terminates, carry out the transmission of HS-PDSCH to travelling carriage 5.
After the data sent from communication network to travelling carriage 3 arrive RNC, the base station 1 or 2 that these data set DPCH to travelling carriage 3 sends by RNC.Here, data are admitted to base station 1.
The above is all common action of the first to the 5th embodiment, utilizes the precedence diagram of Fig. 2 to explain orally the first embodiment below.After the data that should send from communication network to travelling carriage (MS) 3 arrive RNC, the base station (BS) that these data set DPCH to travelling carriage 3 sends by RNC.Here, data are sent (step S10) to base station 1.
1 pair, base station travelling carriage 3 means the advance notice (step S11) that data transmit.Then, the SIR corresponding with the quality of reception of UL DPCH is improved predetermined value (step S12) by base station 1.In addition, make increase predetermined value with the transmitted power of the TPC bit of DL DPCH transmission and carry out sending (step S13).In addition, while the reference power being used for balanced power is promoted a predetermined value, the transmitted power of DL DPCH is also promoted a predetermined value (step S14).
This power-balance is 3GPP (third generation partnership projects) defined, in order in the degree not affecting closed loop transmission power control, by making the transmitted power of DL DPCH close to described reference power at leisure, make the described transmitted power balance between base station.That the reference power used for carrying out this balance adjustment is promoted predetermined value in grouping transmission base station 1.
In travelling carriage 3, after receiving the data transmission advance notice from base station 1, only control (step S15) according to the transmitted power of TPC signal to the UL DPCH self sent of grouping transmission base station 1 transmission.
In the above-described state, first grouping #1 (step S16) after utilizing HS-PDSCH to send from base station 1 to travelling carriage 3 Data Segmentation become block, if correctly have received this grouping #1 in travelling carriage 3, then HS-DPCCH is utilized to send ACK (step S17) to base station 1.Below, similarly send grouping #2 (step S18) from base station 1, send ACK (step S19) from travelling carriage 3 to base station 1.
After data transmission terminates, base station 1 notifies travelling carriage 3 ED (End of Data) (step S20).Response data send terminate, carry out returning process in base station 1, in step S12 ~ S14 respectively altered each numerical value return to initial condition (step S21).And, in travelling carriage 3, in step 81 5 only with the recovering state of transmitted power of the TPC control ULDPCH sending base station 1 that divides into groups for utilizing the TPC of all base stations in soft handover to this initial condition of transmitted power (step S22) of control UL DPCH.In addition, also can replacing the notice of ED (End of Data), when not having grouping to be sent out in the scheduled time, turning back to the initial condition before grouping transmission.
As shown in above-mentioned steps S15, the transmitted power of TPC signal to the UL DPCH that travelling carriage 3 self sends only sending base station 1 to divide into groups controls, thus the transmitted power of travelling carriage can be controlled, the UL DPCH in resulting packets base station 1 is made to meet aimed quality, thus, the quality of reception of that send with the power after add constant offset power value (Δ in formula (1)) in this UL DPCH, in HS-DPCCH ack/nack signal also meets aimed quality.Consequently, the Receiver Precision of ack/nack signal improves, and too increases based on the throughput that the data of HS-DPSCH send.
In addition, grouping sends base station 1 and improves with the engine power (step 13) of the TPC signal of DL DPCH transmission, or improve the reference power of power-balance and the transmitted power (step S14) of DL DPCH, thus, reduce the reception error rate that grouping sends the TPC signal that base station 1 sends, and improve the precision of the transmission power control in travelling carriage 3, therefore, the quality of reception that grouping sends the ack/nack signal in base station 1 can be improved further.In addition, sending in base station 1 in grouping, by promoting the target SIR (step S12) of UL DPCH, the quality of reception of the ack/nack signal in this base station 1 can be improved.
According to the first embodiment, time slot data mode need not be changed as the second method in the past, and, because the offset power value of DPCH and HS-DPCCH is constant, so will as first and second method in the past, cause channel to infer that precision reduces because the quality of reception of the pilot signal of DPCH reduces, thus pilot signal need not be added to HS-DPCCH.
In addition, in the present first embodiment, in grouping transmitting-receiving process, only adopt the process of step S12 ~ S15, time scale larger than the grouping transmitting-receiving time, in time beyond the grouping transmitting-receiving time, do not carry out these process, therefore the situation of interfering and increasing can not be produced within this time.
In addition, only just can realize object of the present invention by the action in the travelling carriage 3 of step S15, and the grouping combination of actions sent in base station 1 of the action of described step S15 and step S12 is implemented also can realize object of the present invention.In addition, send in base station 1 in grouping, even if the action of the action of step S13 or step S14 separately carried out, also can realize object of the present invention.In addition, the reference power only improving the power-balance of step S14 is also passable.
Fig. 3 and Fig. 4 respectively illustrates the functional block diagram for the base station and travelling carriage realizing the first embodiment.With reference to Fig. 3, in a base station, the Received signal strength from antenna 11 is input to receiving unit 13 by antenna switching unit (DUP: duplexer) 12, carry out amplifying, frequency conversion, the process such as demodulation.Demodulation exports and is separated into user profile and various control information by channel separation device 14.These control informations are imported into the process such as the step S12 shown in precedence diagram ~ S14 and S21 of control section (CPU) 15, Fig. 2, carry out according to the procedure order prestored in the memory 16.
On the other hand, the user profile relative with travelling carriage and control information are synthesized by channel composite part 17, and be supplied to transmitting portion 19 after being amplified by amplifier section 18, and carry out the process such as modulation and frequency conversion, then sent by antenna switching unit 12 and antenna 11.
With reference to Fig. 4, in a mobile station, the Received signal strength from antenna 21 is provided to receiving unit 23 by antenna switching unit 22, and carry out amplifying, frequency conversion, the process such as demodulation.Demodulation exports and is separated into user profile and the TPC signal as control information by channel separation device 24.This TPC signal is imported into the step S15 shown in precedence diagram of control section (CPU) 25, Fig. 2 and the process of S22, carries out according to the procedure order be stored in advance in memory 26.
On the other hand, the user profile relative with base station and control information are synthesized at channel composite part 27, and be supplied to transmitting portion 29 after being amplified by amplifier section 28, and carry out the process such as modulation and frequency conversion, then sent by antenna switching unit 22 and antenna 21.
Then, the action sequence diagram with reference to Fig. 5 illustrates the second embodiment of the present invention.After the data that should send from communication network to travelling carriage 3 arrive RNC, the base station that these data set DPCH to travelling carriage 3 sends by RNC.Here, data are sent to base station 1 (step S30).
The advance notice (step S31) meaning data transmission is carried out to travelling carriage 3 in base station 1.Then, the desired value SIR corresponding with the quality of reception of UL DPCH is promoted predetermined value (step S32) by base station 1.On the other hand, if travelling carriage 3 receives after data transmit advance notice from base station 1, then only send according to grouping the transmitted power (step S33) that TPC signal that base station 1 sends controls the UL DPCH that self sends.In addition, travelling carriage 3 only makes the target SIR of DL DPCH increase predetermined value (step S34).
In addition, travelling carriage 3 controls to make the ascensional range of the transmission power control of the UL DPCH in self larger than fall, makes the increase and decrease of rate-determining steps asymmetric (step S35).That is, if set increase step as Δ Pup, if reducing step is Δ Pdown, then Δ Pup > Δ Pdown is made.
In addition, travelling carriage 3, by sending the reception SIR of the DL DPCH that base station 1 sends from grouping, generates the TPC signal (step S36) that the power for DL DPCH controls.
Then, utilize HS-PDSCH to send from base station 1 to travelling carriage 3 and data are divided into each grouping #1 and #2 (step S37, S39) after block, utilize HS-DPCCH to send the ack signal (step S38, S40) meaning and have received each grouping from travelling carriage 3 to base station 1.After data send and terminate, base station 1 is terminated (step S41) to travelling carriage 3 notification data.Respond this ED, in base station 1, altered value will revert to former state (step S42) in step s 32, and in step S33 ~ S36, altered process will revert to former state (step S43) in travelling carriage 3.In addition, in the present embodiment, ED also can being replaced to notify, making when not dividing into groups to send at the appointed time, just turn back to the initial condition before grouping transmission.
In this second embodiment, except carrying out the process (S32 and S33) identical with the step S12 of the precedence diagram in Fig. 2 of the first embodiment and S15, can also in travelling carriage 3, (step S34) is increased by making the target SIR of DL DPCH, improve the quality of reception of the TPC signal received at travelling carriage, and improve the precision of the transmission power control on UL.Thus, the quality of reception that grouping sends the ack/nack signal in base station is improved.
In addition, asymmetric by the rate-determining steps of the transmitted power making the UL DPCH in travelling carriage 3, make to increase step than reducing step large (step S35), thus transmitted power can be made to increase, make it to reach the required quality of reception immediately.Therefore, even if also required quality can be ensured within the short transmission time that grouping is such.In addition, TPC signal (step S36) is generated by the reception SIR of the DL DPCH sending base station from grouping, this DL DPCH is made to become large in the quality of reception of travelling carriage thus, thus can correctly receiving package TPC signal with which, consequently, in base station 1, correctly can receive the HS-DPCCH sent from travelling carriage.
In addition, in a second embodiment, only in grouping sends, adopt the process of step S32 ~ S36, time scale larger than the grouping transmitting-receiving time, in time beyond the grouping transmitting-receiving time, do not carry out these process, thus can not produce to interfere within this time increases.
And in travelling carriage 3, even if the just independently action of implementation step S34 and the action of step S36, also can realize object of the present invention.In addition, grouping sends the action of the step S32 in base station 1, after the combination of actions of the step S33 in travelling carriage 3, then in conjunction with the action of the step S35 in travelling carriage 3, also can realize object of the present invention.
Obviously, the functional block diagram shown in Fig. 3 and Fig. 4 is also applicable to base station for realizing this second embodiment and travelling carriage.
Then, with reference to the flow process of Fig. 6 and Fig. 7, the third embodiment of the present invention is described.Fig. 6 is the motion flow of travelling carriage, respond data transmission advance notice (step S5 1) sending base station 1 from grouping, travelling carriage 3 determines the increment of the offset power Δ SHO of HS-DPCCH according to the quality connecting the DL that base station 1,2 sends with predetermined transmitted power.Specifically, measure received power RP1, the RP2 (step S52) of the common pilot signal from the connection base station 1,2 under soft changing state, and judge the quality of DL.
According to this received power RP1, RP2, determine the increment (step S53) of the offset power Δ SHO of HS-DPCCH.Specifically, offset power Δ SHO is calculated by following formula:
ΔSHO＝ΔNON-SHO+10log 10{max(RP1，RP2)/RP1}(dB) (2)。Here, offset power when Δ NON-SHO is non-soft changing state, max (RP1, RP2) represents RP1, maximum that in RP2.
Therefore, if RP1 > RP2, then Δ SHO=NON-SHO, if RP1 < is RP2, then
ΔSHO＝ΔNON-SHO+10log 10(RP2/RP1) (3)，
The Section 2 on the right is the increment of offset power.The increment making offset power only increase this to determine, and send HS-DPCCH (step S54).
Fig. 7 is the motion flow of the grouping transmission base station in this 3rd embodiment.In addition, the flow process of this Fig. 7 is identical with the action of the base station of the 4th embodiment below.With reference to Fig. 7, the reception (step S61) of response HS-DPCCH, carries out the judgement of ACK/NACK, as being judged to be " NACK " (being " N " in step S62), then carries out common process (step S63).Namely if " NACK ", then the transmission again of respective packets is carried out.
As being judged as in step S62 " ACK ", then carry out the action determining that the grouping in UL sends according to the confidence level of the reception result of determination of the ACK/NACK of HS-DPCCH.That is, detect the confidence level (step S64) of the reception result of determination of ACK/NACK, compare this confidence level and predetermined threshold (step S65).If Reliability ratio threshold value is high, then transfer common process (step S63) to, if low, then have nothing to do with ack/nack signal and be usually judged as NACK (step S66).Therefore, the transmission again (step S67) of respective packets is carried out.
According to this 3rd embodiment, compared with other base stations connected in base station, the propagation loss (line quality) of the UL of base station is sent according to grouping, if namely propagation loss is large, then set larger offset power (Δ SHO), if little, set less offset power, thus the reduction of the quality of reception of the ack/nack signal that propagation loss causes can be compensated.In addition, send in the ACK/NACK judgement in base station in grouping, if NACK erroneous judgement is decided to be ACK, then packet loss can be produced, therefore when being judged as ACK, usually be judged to be NACK according to the confidence level receiving result of determination, thus the error rate of NACK can be reduced and reduce packet loss rate, and then can throughput be improved.
In the present embodiment, the base station number being in soft changing state is 2, when for more than 3 time, the max{RP1 in obvious known above-mentioned formula (2), RP2} are just max{RP1, RP2, RP3 ... .}.
In addition, the action of Fig. 6 and Fig. 7 realizes by each functional block shown in Fig. 3 and Fig. 4 certainly.
Below the fourth embodiment of the present invention is described.Fig. 8 is the action flow chart of the travelling carriage of this 4th embodiment.Response data transmits advance notice (step S71), and the increment (step S72) of the offset power Δ SHO of HS-DPCCH determined by travelling carriage according to the base station number N in soft handover.Specifically, be calculate offset power according to following formula,
ΔSHO＝ΔNON-SHO+10log 10N(dB) (4)，
Thus, the increment of offset power is the Section 2 on formula (4) the right.To add the offset power of the formula (4) of this increment to send HS-DPCCH (step S73).The motion flow that grouping in this 4th embodiment sends base station is identical with the motion flow of Fig. 7.
In this 4th embodiment, there is following effect.Namely, if the base station number N in soft handover becomes large, then the receive diversity gain of DPCH becomes large, therefore the transmitted power of DPCH reduces, but in a mobile station, if this number N becomes large, because the increment of the offset power of HS-DPCCH correspondingly also becomes large, thus the quality of reception of HS-DPCCH is how many regardless of the base station number in soft handover, can control as desirable value.
In addition, the bit series signal that base station receiving mobile sends, and carry out the judgement of ACK or NACK, but when the quality of reception of bit series is poor, the confidence level of its signal message reduces.Now, no matter whether have sent NACK from travelling carriage, be all judged as ACK.Therefore, data in the present invention send in base station (grouping sends base station), are usually judged as NACK according to the confidence level of the reception result of determination of the ACK/NACK of HS-DPCCH.Thus, the error rate of NACK can be reduced, reduce packet loss rate.In addition, owing to infrequently carrying out the calculating of the confidence level of the reception result of determination of the ACK/NACK of HS-DPCCH, just just calculating when being judged as ACK, thus can reduce the load for described calculating.
In addition, in this 4th embodiment, in a mobile station, the only process of application drawing 8 in grouping sends, due to time scale larger than packet delivery time, in time beyond packet delivery time, do not carry out these process, thus can not produce to interfere within this time increases.
The action of above-mentioned 4th embodiment obviously also can be realized by each functional block shown in Fig. 3 and Fig. 4.
Below the fifth embodiment of the present invention is described.In the 5th embodiment, the DPCH of up link as shown in Figure 10, carry out connecting in radio network controller (RNC) 10 and assemble dividing between base station 1,2, this DPCH is controlled as the predetermined quality of reception usually through fast closed-loop transmission power control simultaneously.Specifically, travelling carriage increases and decreases the transmitted power of DPCH according to the TPC bit sent from base station, and the power that the transmitted power PDPDCH of DPDCH obtains to add predetermined offset value delta 1 on the transmitted power PDPCCH of DPCCH sends.That is, following relation of plane sends:
PDPDCH＝PDPCCH+Δ1(dB) (5)。
In addition, the power that the transmitted power PH of HS-DPCCH obtains to add predetermined offset value delta 2 on the transmitted power PDPCCH of this DPCCH sends.That is, following relation of plane sends:
PH＝PDPCCH+Δ2(dB) (6)。
Wherein, in formula (5) and formula (6), each value is decibel value.
This action and the first embodiment are in fact identical, but in this 5th embodiment, when the transmitted power of travelling carriage is restricted to predetermined maximum, preferentially guarantee the transmitted power of HS-DPCCH, and suppress the transmitted power of DPDCH.Except this point, all identical with the first embodiment.The control of the transmitted power of DPDCH is suppressed to be carried out in the control section 25 of the travelling carriage of Fig. 4.
Fig. 9 is the flow process that the transmitted power of DPDCH in this 5th embodiment suppresses.With reference to Fig. 9, travelling carriage receives TPC bit (step S81), calculates the total transmitted power (step S82) of DPCCH and HS-DPCCH, calculates the maximum transmit power (step S83) can distributing to DPDCH.This DPDCH maximum transmit power is obtained by the total transmitted power deducting DPCCH and HS-DPCCH from the predetermined maximum of transmitted power.
Then, when the transmitted power of the DPDCH calculated by formula (5) is no more than DPDCH maximum transmit power, using the transmitted power of DPDCH as the value (step S85) calculated by formula (5), when the transmitted power of the DPDCH calculated by formula (5) is more than DPDCH maximum transmit power, the transmitted power of DPDCH is suppressed to make it as DPDCH maximum transmit power (step S86).
In addition, as the method for the transmitted power of suppression DPDCH, when the total transmitted power of travelling carriage is close to predetermined maximum, the value of the offset value delta 1 in formula (5) can also temporarily be reduced.
In this 5th embodiment, there is following effect.Namely, when the propagation loss from travelling carriage to base station is large, or when the interference wave power that grouping transmission base station receives is large, travelling carriage needs HS-DPCCH to send with large transmitted power, and the ratio of the transmitted power of DPCCH and DPDCH is kept constant, transmitted power due to travelling carriage reaches predetermined maximum, therefore the transmitted power of HS-DPCCH can not be made fully to increase, thus the quality of reception being contained in the ack/nack signal in HS-DPCCH may reduce.
But, in this 5th embodiment, when the transmitted power of travelling carriage is restricted to the maximum of regulation, owing to inhibit the transmitted power of DPDCH, therefore the transmitted power can distributed to HS-DPCCH becomes large, thus the possibility that the quality of reception reducing ack/nack signal reduces.Consequently, send in base station the quality of reception that improve ack/nack signal in grouping, and add the throughput that the data based on HS-DPSCH send.
In addition, in the 5th embodiment, under the soft changing state of travelling carriage and multiple base station sets dedicated channel, as shown in the step S15 of the first embodiment, in grouping receives, only control by the transmitted power of TPC signal to the UL DPCH that travelling carriage sends of grouping transmission base station.Now, this travelling carriage be in the base station of soft changing state, no matter whether meet predetermined quality target in the quality of reception dividing into groups to send DPCCH and DPDCH in the base station beyond base station, the quality of reception of DPCCH and the DPDCH sent in base station due to grouping does not meet predetermined quality target, so there is the situation that travelling carriage makes the transmitted power of DPCCH and DPDCH increase.Now, the transmitted power of DPDCH is increased to required more than.This is that DPDCH owing to receiving in the multiple base stations being in soft changing state divides the cause assembled.Therefore, in a soft handover state, to be restricted to the possibility of predetermined maximum higher for the transmitted power of travelling carriage.
But in this 5th embodiment, the maximum making the transmitted power of HS-DPCCH not be moved the transmitted power of platform by suppressing the transmitted power of DPDCH limited.Therefore, particularly in a soft handover state, send in grouping the effect improving the quality of reception of ack/nack signal in base station to increase.
As mentioned above, according to the present invention, following effect can be obtained: though when travelling carriage by be in soft changing state and state with multiple base station sets DPCH time, because grouping transmission base station can with enough quality reception HS-DPCCH, thereby reduce and be contained in this HS-DPCCH, that expression normally could receive the ack/nack signal of grouping error rate, there is no packet loss, achieve the raising of throughput.
In addition, just in soft changing state and in grouping transmitting-receiving, the reduction just carrying out above-mentioned ack/nack signal error rate controls, in the grouping that time scale is larger than the grouping transmitting-receiving time is waited for, do not carry out this control, thus the increase of transmitted power can not be caused just can to reduce the error rate of ack/nack signal, and the diversity effect during soft handover of UL/DL DPCH does not have any loss yet.
Industrial applicibility:
The present invention is applicable to the cellular system comprising travelling carriage and base station, is particularly applicable to the system being sent ACK/NACK by HS-DPCCH from travelling carriage to base station.

Claims (3)

1. a communication control method, it performs soft handover by arranging in a mobile station with the uplink dedicated physical channels of multiple base station and downlink dedicated physical channels, said method comprising the steps of:
Shared channel is utilized to receive the grouping only sending base station from the grouping sending grouping in described multiple base station; And
Increase the target sir of the signal received through described downlink dedicated physical channels, thus improve the quality of reception only being sent the transmission power control signal that base station sends by described grouping be included in described downlink dedicated physical channels.
2. communication control method according to claim 1, described communication control method is further comprising the steps of:
The transmission power control signal of the through-put power for controlling described downlink dedicated physical channels is only produced according to the Received signal strength interference ratio sending the described downlink dedicated physical channels that base station is sent from described grouping.
3. one kind with communication control method in a mobile station, it performs soft handover by arranging with the up-link of multiple base station and downlink dedicated channel, these up links and downlink dedicated channel comprise the transmission power control information for other dedicated channels separately, said method comprising the steps of:
Shared channel is utilized to receive the grouping only sending base station from the grouping sending grouping in described multiple base station; And
Only produce the transmission power control signal of the through-put power for controlling described downlink dedicated channel according to the quality of reception sending the signal received in the downlink dedicated channel of base station from the grouping described multiple base station at the reception period of grouping.
CN200610170652.5A 2002-04-03 2003-04-03 Cellular system, base station and travelling carriage and communication control method Expired - Lifetime CN1968540B (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP2002-100701 2002-04-03
JP2002100701 2002-04-03
JP2002100701 2002-04-03
JP2002132224 2002-05-08
JP2002-132224 2002-05-08
JP2002132224A JP4423836B2 (en) 2002-04-03 2002-05-08 Cellular system, communication control method, and mobile station
CN03807558XA CN100407848C (en) 2002-04-03 2003-04-03 Cellular system, base station, mobile station, and communication control method

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CN03807558XA Division CN100407848C (en) 2002-04-03 2003-04-03 Cellular system, base station, mobile station, and communication control method

Publications (2)

Publication Number Publication Date
CN1968540A CN1968540A (en) 2007-05-23
CN1968540B true CN1968540B (en) 2015-09-16

Family

ID=38077011

Family Applications (2)

Application Number Title Priority Date Filing Date
CN200610170652.5A Expired - Lifetime CN1968540B (en) 2002-04-03 2003-04-03 Cellular system, base station and travelling carriage and communication control method
CN2008101114555A Expired - Lifetime CN101312598B (en) 2002-04-03 2003-04-03 Cellular system, base station, mobile station, and communication control method

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN2008101114555A Expired - Lifetime CN101312598B (en) 2002-04-03 2003-04-03 Cellular system, base station, mobile station, and communication control method

Country Status (2)

Country Link
JP (3) JP4893724B2 (en)
CN (2) CN1968540B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8477672B2 (en) * 2010-02-10 2013-07-02 Qualcomm Incorporated 4C-HSDPA acknowledgment signaling
EP2640127B1 (en) 2012-03-16 2017-05-03 Alcatel Lucent Proactive uplink transmit power increase in small cells upon outbound handovers
JP6458571B2 (en) * 2015-03-13 2019-01-30 沖電気工業株式会社 Wireless communication apparatus and wireless communication program

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1220812A (en) * 1997-02-18 1999-06-23 诺基亚电信公司 Handover in mobile communication system
CN1234711A (en) * 1998-02-16 1999-11-10 日本电气株式会社 Base-station transmitting-power control system and mobile station and base station thereof
WO2002001893A2 (en) * 2000-06-30 2002-01-03 Nokia Corporation Downlink shared channel (dsch) power control in soft handover

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1189942A (en) * 1995-06-02 1998-08-05 Dsc通讯有限公司 Appts. and method of controlling transmitting power in a subscriberterminal of a wireless teldcommunications system
JPH1079701A (en) * 1996-09-03 1998-03-24 Fujitsu Ltd Mobile communication terminal and its transmission power control system
JP3343214B2 (en) * 1998-04-17 2002-11-11 株式会社日立製作所 Transmission power control method at the time of executing soft handover and apparatus for implementing the method
JP3960799B2 (en) * 1999-05-26 2007-08-15 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Closed loop power control in wireless communication systems
JP3276620B2 (en) * 1999-10-29 2002-04-22 松下電器産業株式会社 Base station apparatus and transmission power control method
JP4240726B2 (en) * 2000-02-04 2009-03-18 株式会社日立コミュニケーションテクノロジー Wireless communication system, base station control station, base station, and transmission power control method
JP3480710B2 (en) * 2000-03-28 2003-12-22 松下電器産業株式会社 Transmission power control device and transmission power control method
JP2002026747A (en) * 2000-07-13 2002-01-25 Matsushita Electric Ind Co Ltd Wireless communication terminal device and transmission power control method
CN1210886C (en) * 2000-08-21 2005-07-13 皇家菲利浦电子有限公司 Method for communication of information and apparatus employing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1220812A (en) * 1997-02-18 1999-06-23 诺基亚电信公司 Handover in mobile communication system
CN1234711A (en) * 1998-02-16 1999-11-10 日本电气株式会社 Base-station transmitting-power control system and mobile station and base station thereof
WO2002001893A2 (en) * 2000-06-30 2002-01-03 Nokia Corporation Downlink shared channel (dsch) power control in soft handover

Also Published As

Publication number Publication date
CN1968540A (en) 2007-05-23
JP2010051034A (en) 2010-03-04
JP2009065693A (en) 2009-03-26
JP4893724B2 (en) 2012-03-07
JP4858601B2 (en) 2012-01-18
JP2009071865A (en) 2009-04-02
JP4968244B2 (en) 2012-07-04
CN101312598B (en) 2013-07-24
CN101312598A (en) 2008-11-26

Similar Documents

Publication Publication Date Title
CN100407848C (en) Cellular system, base station, mobile station, and communication control method
EP1653765B1 (en) Cellular system, base station, mobile station and communication control method therefor
US7346034B2 (en) Cellular system, mobile station, base station and transmission power control method as well as program to be executed for implementing the method
EP1223769B1 (en) Power control apparatus and method for a W-CDMA communication system employing a high-speed downlink packet access scheme
KR100616648B1 (en) Transmissions in a communication system
US8130694B2 (en) Method for controlling transmission power of HS-SCCH in UMTS system
EP1826922B1 (en) Mobile communication system, mobile station, and radio base station
EP1354426B1 (en) Radio communication system
US7725121B2 (en) Mobile communication system, wireless base station, radio network controller, and power control method
US20020119798A1 (en) Mobile communication system, transmission power control method therefor, and base station used therefor
MXPA04005859A (en) Method for trasmitting power control information for hs-scch in mobile communication system.
KR20040097359A (en) Communication terminal device, base station device, and transmission power control method
AU7702498A (en) Modified downlink power control during macrodiversity
CN102804871A (en) Transmit Power Control Of Channels Transmitted In Different Frequency Regions
KR100357265B1 (en) A method for power control of tfci field in a mobile communication system of 3gpp standard
CN1968540B (en) Cellular system, base station and travelling carriage and communication control method
KR20020029143A (en) Power control of downlink shared channel in soft handover in 3gpp system
AU2008200143A1 (en) Transmissions in a communication system
KR100874834B1 (en) Wireless communication system
MXPA99011142A (en) Modified downlink power control during macrodiversity

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 1107212

Country of ref document: HK

C14 Grant of patent or utility model
GR01 Patent grant
REG Reference to a national code

Ref country code: HK

Ref legal event code: GR

Ref document number: 1107212

Country of ref document: HK

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20150916