CN103379606B - A kind of method of control E-HICH transmitting power and base station - Google Patents

Abstract

The invention provides a kind of method and base station of control E-HICH transmitting power, the method comprises: the user power surplus (UPH) of the subscriber equipment of all configuration HSUPA business in acquisition Serving cell, base station; Described base station arranges the Initial Trans of E-HICH according to the maximum transmission power of UPH, UE and the maximum transmission power of E-HICH.The accurate power that can be realized E-HICH channel by the present invention is controlled, on the basis of effective transmission of guarantee information, and the transmitting power needed for reduction, and then promote network performance.

Description

A kind of method of control E-HICH transmitting power and base station

Technical field

The present invention relates to wireless telecommunication system field, the method of a kind of control E-HICH transmitting power particularly existed in TD-SCDMA (TimeDivisionSynchronousCodeDivisionMultipleAccess, TD SDMA) wireless telecommunication system and base station.

Background technology

TD-SCDMA wireless telecommunication system is one of 3-G (Generation Three mobile communication system) standard of 3GPP (3rdGenerationPartnershipProject, third generation partner program) normalized definition.

E-DCHHARQ (EnhancedDedicatedChannel, strengthen dedicated channel, HybridAutomaticRepeatReques, hybrid automatic repeat-request) confirm indicating channel (E-DCHHybridARQIndicatorChannel, be called for short E-HICH) be down physical channel, (HARQ-ACK) instruction is confirmed, for uplink packet transmission provides confirmation for carrying up E-DCH hybrid ARQ.If NodeB (base station) correctly receives the grouped data of E-PUCH (enhancing uplink physical channel), then feed back the confirmation (ACK) correctly receiving data, otherwise by the confirmation (NACK) of feedback one negative.If UE (subscriber equipment) receives confirm ACK order, illustrate that NodeB correctly receives data, so UE will send new data; If UE receives negative NACK order, illustrate that NodeB does not correctly receive data, so UE will resend and upload unsuccessful data.If the number of times of UE data retransmission has reached the maximum retransmission of regulation but still data retransmission is unsuccessful, then UE will transmit new data.

Because this channel (E-HICH) carries the confirmation of many UE simultaneously, so the power that up to the present clear stipulaties is not relevant in agreement controls to illustrate, the transmitting power of a regulation E-HICH is determined by NodeB.

E-UCCH namely strengthens ascending control channel, mainly assists E-PUCH to carry out the transmission of data.That the E-PUCH physical channel of scheduled transmission or non-scheduled transmission all at least carries an E-UCCH, this channel carries TBS (TransportB1ockSize, transport block size) 6bit, RSN (Theretransmissionsequencenumber, retransmission sequence number) 2bit, HARQID (TheHARQprocessID, HARQ process identification (PID)) 2bit.Wherein, RSN represents the sequence number of data re-transmission, RSN=0 during initial transmission, RSN=1 when first time retransmits, RSN=2 when second time retransmits, during number of retransmissions n >=3,2+ (nmod2) (result can become or 2 or 3, nmod2 be meant to number of retransmissions divided by the remainder after 2).

At present, mostly adopt all users for diverse location in community to adopt maximum transmission power in the implementation, so will cause power dissipation for the user near base station, introduce unnecessary interference.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of method and base station of control E-HICH transmitting power, to realize the accurate control of E-HICH power.

In order to solve the problems of the technologies described above, the invention provides a kind of method of control E-HICH transmitting power, comprising:

The user power surplus (UPH) of the subscriber equipment of all configuration high-speed uplink packet access (HSUPA) business in acquisition Serving cell, base station;

Described base station arranges the Initial Trans of E-HICH according to the maximum transmission power of UPH, UE and the maximum transmission power of E-HICH.

Further, said method also has feature below: described base station is according to the maximum transmission power P of UPH, UE _maxwith the maximum transmission power EHICH of E-HICH _powerMaxthe Initial Trans EHICH of E-HICH is set _powercomprise:

Calculate bias power EHICH _powerRatio, wherein,

EHICH _Power＝EHICH _PowerRatio×EHICH _PowerMax×α+β；

Wherein, P _{uPH_Max}for the power after the minimum UPH conversion in subscriber equipmenies all in Serving cell; α is compensation coefficient, α ∈ [0.1,2]; β is improvement factor.

Further, said method also has feature below: after described base station arranges the Initial Trans of E-HICH, in the process of transmission data, comprising:

The transmission confirmation of hybrid automatic repeat request process mark (HARQID) of the subscriber equipment of all configuration HSUPA business in acquisition Serving cell, described base station, retransmission sequence number (RSN) information that subscriber equipment carries on ascending control channel and described base station;

Whether the data that described base station sends according to subscriber equipment are correctly transmitted, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power.

Further, said method also has feature below: whether the data that described base station sends according to subscriber equipment are correctly transmitted, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power, comprising:

The data that described base station sends according to subscriber equipment whether by correct transmission, described HARQID, described RSN information and described transmission confirmation, the transmitted error rate of calculating subscriber equipment in corresponding HARQ instance process;

Described transmitted error rate and preset error threshold value are compared, obtains corresponding power compensating value;

E-HICH transmitting power is adjusted by described power compensating value.

Further, said method also has feature below: whether the data that described base station sends according to subscriber equipment by confirmation, the transmitted error rate ErrorRate of calculating subscriber equipment in corresponding HARQ instance process of correct transmission, described HARQID, described RSN information and described transmission, comprising:

Described base station calculates ErrorRate by following formula:

$\mathrm{ErrorRate}=\frac{\mathrm{ErrorCounter}}{\mathrm{ErrorCounter}+\mathrm{CorrectCounter}}\×100$

Wherein, ErrorCounter is error of transmission counter, and act in HARQ process corresponding to all subscriber equipmenies, ErrorCounter is initialized as 0, and counting rule is as follows:

When number of retransmissions is less than 3, described base station sends the transmission confirmation (NACK) of negative, but when the new RSN received is less than or equal to old RSN, ErrorCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, but the new RSN received is not equal to 2 when adding the remainder of number of retransmissions divided by 2, and ErrorCounter is from adding once;

Wherein, CorrectCounter is the correct counter of transmission, and act in the same HARQ process of same subscriber equipment, CorrectCounter is initialized as 0, and counting rule is as follows:

When described base station sends the transmission confirmation (ACK) determined, when the new RSN received equals old RSN and equals 0, CorrectCounter is from adding once;

When number of retransmissions is less than 3, described base station sends NACK, and when new RSN is greater than old RSN, CorrectCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, and the new RSN received equals 2 when adding the remainder of number of retransmissions divided by 2, and CorrectCounter is from adding once.

Further, said method also has feature below: describedly described transmitted error rate and preset error threshold value are compared, and obtains corresponding power compensating value, adjusts E-HICH transmitting power, comprising by described power compensating value:

If described transmitted error rate is greater than the first error threshold value, then obtaining described power compensating value is one or more preset power per liter step values, then current E-HICH transmitting power is added this one or more preset power per liter step value;

If described transmitted error rate is less than the second error threshold value, then obtains described power compensating value and be 1 and preset fall power step size value, then current E-HICH transmitting power is deducted this 1 and preset fall power step size value;

Described first error threshold value is greater than described second error threshold value.

In order to solve the problem, present invention also offers a kind of method of control E-HICH transmitting power, comprising:

Base station, in the process of transmission data, obtains the transmission confirmation of hybrid automatic repeat request process mark (HARQID) of the subscriber equipment of all configuration high-speed uplink packet access (HSUPA) business in Serving cell, retransmission sequence number (RSN) information that subscriber equipment carries on ascending control channel and described base station;

Whether the data that described base station sends according to subscriber equipment are correctly transmitted, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power.

Further, said method also has feature below: whether the data that described base station sends according to subscriber equipment are correctly transmitted, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power, comprising:

The data that described base station sends according to subscriber equipment whether by correct transmission, described HARQID, described RSN information and described transmission confirmation, the transmitted error rate of calculating subscriber equipment in corresponding HARQ instance process;

Described transmitted error rate and preset error threshold value are compared, obtains corresponding power compensating value;

E-HICH transmitting power is adjusted by described power compensating value.

Further, said method also has feature below: whether the data that described base station sends according to subscriber equipment by confirmation, the transmitted error rate ErrorRate of calculating subscriber equipment in corresponding HARQ instance process of correct transmission, described HARQID, described RSN information and described transmission, comprising:

Described base station calculates ErrorRate by following formula:

$\mathrm{ErrorRate}=\frac{\mathrm{ErrorCounter}}{\mathrm{ErrorCounter}+\mathrm{CorrectCounter}}\×100$

Wherein, ErrorCounter is error of transmission counter, and act in HARQ process corresponding to all subscriber equipmenies, ErrorCounter is initialized as 0, and counting rule is as follows:

When number of retransmissions is less than 3, described base station sends the transmission confirmation (NACK) of negative, but when the new RSN received is less than or equal to old RSN, ErrorCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, but the new RSN received is not equal to 2 when adding the remainder of number of retransmissions divided by 2, and ErrorCounter is from adding once;

Wherein, CorrectCounter is the correct counter of transmission, and act in the same HARQ process of same subscriber equipment, CorrectCounter is initialized as 0, and counting rule is as follows:

When described base station sends the transmission confirmation (ACK) determined, when the new RSN received equals old RSN and equals 0, CorrectCounter is from adding once;

When number of retransmissions is less than 3, described base station sends NACK, and when new RSN is greater than old RSN, CorrectCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, and the new RSN received equals 2 when adding the remainder of number of retransmissions divided by 2, and CorrectCounter is from adding once.

Further, said method also has feature below: describedly described transmitted error rate and preset error threshold value are compared, and obtains corresponding power compensating value, adjusts E-HICH transmitting power, comprising by described power compensating value:

If described transmitted error rate is greater than the first error threshold value, then obtaining described power compensating value is one or more preset power per liter step values, then current E-HICH transmitting power is added this one or more preset power per liter step value;

If described transmitted error rate is less than the second error threshold value, then obtains described power compensating value and be 1 and preset fall power step size value, then current E-HICH transmitting power is deducted this 1 and preset fall power step size value;

Described first error threshold value is greater than described second error threshold value.

In order to solve the problem, present invention also offers a kind of base station, comprising:

Acquisition module, for obtaining the user power surplus (UPH) of the subscriber equipment of all configuration high-speed uplink packet access (HSUPA) business in Serving cell;

First arranges module, for arranging the Initial Trans of E-HICH according to the maximum transmission power of UPH, UE and the maximum transmission power of E-HICH.

Further, above-mentioned base station also has feature below:

Described first arranges module, for the maximum transmission power P according to UPH, UE _maxwith the maximum transmission power EHICH of E-HICH _powerMaxthe Initial Trans EHICH of E-HICH is set _power, comprising:

Calculate bias power EHICH _powerRatio, wherein,

EHICH _Power＝EHICH _PowerRatio×EHICH _PowerMax×α+β；

Wherein, P _{uPH_Max}for the power after the minimum UPH conversion in subscriber equipmenies all in Serving cell; α is compensation coefficient, α ∈ [0.1,2]; β is improvement factor.

Further, above-mentioned base station also has feature below: also comprise second and arrange module,

Described acquisition module, also in the process of transmission data, obtain the transmission confirmation of hybrid automatic repeat request process mark (HARQID) of the subscriber equipment of all configuration HSUPA business in Serving cell, retransmission sequence number (RSN) information that subscriber equipment carries on ascending control channel and described base station;

Whether described second arranges module, correctly transmitted for the data sent according to subscriber equipment, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power.

Further, above-mentioned base station also has feature below: described second arranges module comprises:

First module, for the data that send according to subscriber equipment whether by correct transmission, described HARQID, described RSN information and described transmission confirmation, the transmitted error rate of calculating subscriber equipment in corresponding HARQ instance process;

Second unit, for described transmitted error rate and preset error threshold value being compared, obtains corresponding power compensating value;

Unit the 3rd, for adjusting E-HICH transmitting power by described power compensating value.

Further, above-mentioned base station also has feature below:

Described first module, specifically for calculating ErrorRate by following formula:

$\mathrm{ErrorRate}=\frac{\mathrm{ErrorCounter}}{\mathrm{ErrorCounter}+\mathrm{CorrectCounter}}\×100$

Wherein, ErrorCounter is error of transmission counter, and act in HARQ process corresponding to all subscriber equipmenies, ErrorCounter is initialized as 0, and counting rule is as follows:

When number of retransmissions is less than 3, described base station sends the transmission confirmation (NACK) of negative, but when the new RSN received is less than or equal to old RSN, ErrorCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, but the new RSN received is not equal to 2 when adding the remainder of number of retransmissions divided by 2, and ErrorCounter is from adding once;

Wherein, CorrectCounter is the correct counter of transmission, and act in HARQ process corresponding to all subscriber equipmenies, CorrectCounter is initialized as 0, and counting rule is as follows:

When described base station sends the transmission confirmation (ACK) determined, when the new RSN received equals old RSN and equals 0, CorrectCounter is from adding once;

When number of retransmissions is less than 3, described base station sends NACK, and when new RSN is greater than old RSN, CorrectCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, and the new RSN received equals 2 when adding the remainder of number of retransmissions divided by 2, and CorrectCounter is from adding once.

Further, above-mentioned base station also has feature below:

Described second unit, if specifically for judging that described transmitted error rate is greater than the first error threshold value, then obtaining described power compensating value is one or more preset power per liter step values; If judge, described transmitted error rate is less than the second error threshold value, then obtain described power compensating value and be 1 and preset fall power step size value, described first error threshold value is greater than described second error threshold value;

Described Unit the 3rd, specifically for adding this one or more preset power per liter step value by current E-HICH transmitting power; Or current E-HICH transmitting power deducted this 1 and preset fall power step size value.

To sum up, the invention provides a kind of method and base station of control E-HICH transmitting power, control for the accurate power realizing E-HICH channel, on the basis of effective transmission of guarantee information, the transmitting power needed for reduction, and then promote network performance.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of the base station of the embodiment of the present invention;

Fig. 2 is the flow chart of the method for the control E-HICH transmitting power of the embodiment of the present invention one;

Fig. 3 is the flow chart of the method for the control E-HICH transmitting power of the embodiment of the present invention two.

Embodiment

The power that E-HICH can be set by power bias method is just given simply in existing protocol, do not provide the power bias technical scheme that E-HICH is rationally set, therefore, there is following defect: due to different types of service and channel circumstance, different to the requirement of descending E-HICH transmitting power, if power setting is too high, the transmitting power of other physical channels in community will be affected; And if power setting is on the low side, then UE correctly cannot know carrying HAEQ indication information on the e-hich, thus have impact on the correct realization of HARQ functions of retransmission and the uplink throughput of HSUPA (HighSpeedUplinkPacketAccess, High Speed Uplink Packet accesses) system.

After user initiates HSUPA business, EAGCH (E-DCHAbsoluteGrantChannel, absolute grant channel), EPUCH, EHICH start as HSUPA data service provides service, wherein, EAGCH, EHICH provide necessary control information transmission service for EPUCH transport service.First carry configuration information by EAGCH and notify UE outgoing data can send in which resource, when carrying out confirmation of receipt instruction on EHICH channel after NodeB completes the reception of EPUCH, correct reception sends ACK, incorrect transmission NACK.Data on EPUCH channel are if new biography, and the new biography RSN=0 that it carries, retransmits RSN > 0, and every multiple biography once from adding once, abandons after exceeding maximum retransmission.

If the confirmation data of EHICH can not correctly be obtained the mistake that the data normally received may be caused again to retransmit by UE, thus waste resource and reduce network performance, if in order to ensure that all UE can, with higher success rate confirmation of receipt information, need to launch with relatively high power, because EHICH channel is a broadcast channel, all UE share, Here it is, and current most of equipment all configures this channel with maximum power transmission, and does not do the accurate reason controlled.

For making the object, technical solutions and advantages of the present invention clearly understand, hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.

Fig. 1 is the schematic diagram of the base station of the embodiment of the present invention, and as shown in Figure 1, the base station of the present embodiment comprises:

Acquisition module: for obtaining the UPH (UEPowerHeadroom of the subscriber equipment of all configuration high-speed uplink packet access (HSUPA) business in Serving cell, user power surplus), the transmission confirmation of hybrid automatic repeat request process mark (HARQID), retransmission sequence number (RSN) information that subscriber equipment carries on ascending control channel and described base station can also be obtained;

Particularly, UPH is solved in the data of being carried at E-RUCCH (enhanced uplink random access channel) channel by UE, and be kept at separately in data memory module for each user, only record up-to-date UPH numerical value, will be capped before, this value passes as new user head the direct basis that in E-HICH power bias computing module, power changes, and same also needs to detect and preserve the information such as HARQID, RSN.

The transmission confirmation of described base station is ACK or NACK.

First arranges module, for arranging the Initial Trans of E-HICH according to the maximum transmission power of UPH, UE and the maximum transmission power of E-HICH.

Whether second arranges module, correctly transmitted for the data sent according to subscriber equipment, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power.

Wherein, described first arranges module, for the maximum transmission power P according to UPH, UE _maxwith the maximum transmission power EHICH of E-HICH _powerMaxthe Initial Trans EHICH of E-HICH is set _power, comprising:

Calculate bias power EHICH _powerRatio, wherein,

EHICH _Power＝EHICH _PowerRatio×EHICH _PowerMax×α+β；

Wherein, P _{uPH_Max}for the power after the minimum UPH conversion in subscriber equipmenies all in Serving cell; α is compensation coefficient, α ∈ [0.1,2]; β is improvement factor.

Wherein, described second module be set comprise:

First module, for the data that send according to subscriber equipment whether by correct transmission, described HARQID, described RSN information and described transmission confirmation, the transmitted error rate of calculating subscriber equipment in corresponding HARQ instance process;

Second unit, for described transmitted error rate and preset error threshold value being compared, obtains corresponding power compensating value;

Unit the 3rd, for adjusting E-HICH transmitting power by described power compensating value.

Described first module is specifically for calculating ErrorRate by following formula:

$\mathrm{ErrorRate}=\frac{\mathrm{ErrorCounter}}{\mathrm{ErrorCounter}+\mathrm{CorrectCounter}}\×100$

Wherein, ErrorCounter is error of transmission counter, and act in HARQ process corresponding to all subscriber equipmenies, ErrorCounter is initialized as 0, and counting rule is as follows:

When number of retransmissions is less than 3, described base station sends the confirmation (NACK) of negative, but when the new RSN received is less than or equal to old RSN, ErrorCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends the confirmation (NACK) of negative, but the new RSN received is not equal to 2 when adding the remainder of number of retransmissions divided by 2, and ErrorCounter is from adding once;

Wherein, CorrectCounter is the correct counter of transmission, and act in HARQ process corresponding to all subscriber equipmenies, CorrectCounter is initialized as 0, and counting rule is as follows:

When described base station sends ACK, when the new RSN received equals old RSN and equals 0, CorrectCounter is from adding once;

When number of retransmissions is less than 3, described base station sends NACK, and when new RSN is greater than old RSN, CorrectCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, and the new RSN received equals 2 when adding the remainder of number of retransmissions divided by 2, and CorrectCounter is from adding once.

Wherein, if described second unit is specifically for judging that described transmitted error rate is greater than the first error threshold value, then obtaining described power compensating value is one or more preset power per liter step values; If judge, described transmitted error rate is less than the second error threshold value, then obtain described power compensating value and be 1 and preset fall power step size value, described first error threshold value is greater than described second error threshold value;

Described Unit the 3rd, specifically for adding this one or more preset power per liter step value by current E-HICH transmitting power; Or current E-HICH transmitting power deducted this 1 and preset fall power step size value.

The base station of the present embodiment can also comprise: data memory module, for preserving the UPH information of NodeB owning user and corresponding E-HICH transmitting power, the ERRORRATE (transmitted error rate) of community HSUPA business, the number of retransmissions of various process and business.Data in notebook data memory module can by all process transfers in the present embodiment and amendment, for preserving all proprietary data information related to.

Wherein, the ratio of UPH Parametric Representation maximum UE transmitting power and corresponding Pe-base (network expects the minimum received power received) and non-serving cell path loss code word power sum.The E-HICH power bias ratio needed for each UE transmission data can be calculated, as Δ EHICH by this information _power< Δ EHICH _{th_Power}time, do not upgrade the power bias first of E-HICH, with EHICH after exceeding _power± PowerControl_Step resets EHICH transmitting power.

Δ EHICH _powerthe absolute value of the difference of last E-HICH channel emission power and current transmitting power, Δ EHICH _power=| EHICH _power(n)-EHICH _power(n-1) |.

PowerControl_Step is the step-length of E-HICH channel power change each time.

Can according to the BLERTarget (BlockErrorRatioTarget of system configuration, the desired value of bLock error rate) determine required power control step-length with proportional manner, such as BLERTarget is 5%, so raising power step size is (N*0.05) dB, lowering power step size is (1-N*0.05) dB, N be greater than 0 integer, be defaulted as 1.

For each UE carries out the calculating of power bias ratio, conduct maximum in current area is finally adopted to export, Δ EHICH _powerit is cell-level calculating parameter.

After the minimum UPH in netinit and all UE changes, E-HICH transmitting power just can upgrade.

Before dynamically arranging E-HICH transmitting power, can also judge whether to exceed initial guard time, carry out again dynamically arranging E-HICH transmitting power after exceeding initial guard time, to prevent because sample number causes the shake of ERRORRATE data very little.

Fig. 2 is the flow chart of the method for the control E-HICH transmitting power of the embodiment of the present invention one, and as shown in Figure 2, the method for the present embodiment comprises step below:

The UPH of the subscriber equipment of all configuration HSUPA business in S10, acquisition Serving cell, base station;

S20, base station arrange the Initial Trans of E-HICH according to the maximum transmission power of UPH, UE and the maximum transmission power of E-HICH.

The method of the Initial Trans of the configuration E-HICH of the present embodiment, and arranges compared with a maximum Initial Trans in prior art, can saving power effectively.

In the process of transmission data, step below can be comprised:

The transmission confirmation of the HARQID of the subscriber equipment of all configuration HSUPA business in S30, acquisition Serving cell, base station, RSN information that subscriber equipment carries on ascending control channel and described base station;

Whether the data that S40, base station send according to subscriber equipment are correctly transmitted, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power.

Like this, Dynamic controlling E-HICH transmitting power in the process of transmission data, can saving power resource further.

With specific embodiment, method of the present invention is described in detail below.

After having some users to be configured with HSUPA business in a certain community, after UE uploads E-PUCH and E-UCCH, as shown in Figure 3, following operation is carried out in NodeB side:

Step 101:NodeB measures and adds up UPH, HARQID, RSN of all UE;

NodeB obtains the UPH of all configuration HSUPA business UE in Serving cell and monitors the RSN information that EPUCH channel carries.

Choose that UPH value that all users in network are minimum, because EHICH is shared channel, ensuring coverage to all users, namely the channel circumstance of that user that UPH value is minimum is the poorest.

When UE initiates up-high speed data service, by E-RUCCH channel SI reporting (ScheduleInformation, schedule information), this channel carries the information that SNPL (ServingandNeighborCellPathloss, the path loss of Serving cell and neighbor cell), UPH etc. can reflect UE path loss and transmitting power.

Step 102: judge whether that the first transmitting power first passing E-HICH, EHICH adopts open loop power control, be enter step 103, otherwise be, enter step 104.

Step 103: first biography E-HICH bias power is set;

Control to realize power comparatively accurately, first will know the maximum EHICH transmitting power that in Serving cell, all UE need, the maximum transmission power of EHICH is determined by eNodeB.Detect the maximum path loss power of all UE of current area configuration HSUPA business, according to agreement regulation, this information is obtained after being calculated by the UPH information that E-RUCCH reports by UE.

In conjunction with the maximum transmission power of UE, (maximum transmission power giving tacit consent to all UE in TDSCDMA is consistent, determined by system configuration), after UPH being converted to the milliwatt power of UE, it is deducted and compared with maximum transmission power with the maximum transmission power of UE, and then obtain a ratio, path loss or the disturbed condition of this ratio less explanation UE are more serious, and the power that correct decryption needs is also higher.Bias power can be obtained by following formula:

${\mathrm{EHICH}}_{\mathrm{PowerRatio}}=\frac{P_{\mathrm{Max}}-P_{\mathrm{UPH}\_\mathrm{Max}}}{P_{\mathrm{Max}}}$

The ratio that can obtain the correct transmitting power needed for decryption of UE energy is accordingly interval; be mapped on EHICH according to this ratio; be multiplied by a coefficient with this ratio to add an adjusted basis and can obtain HSUPA business initializtion transmitting power; the setting of these two coefficients is to give certain power protection; generally α is set to 1; β is set to 3, if the EHICH power exported is greater than maximum transmission power, gets maximum transmission power.HSUPA business initializtion transmitting power EHICH _powercan be calculated by following formula:

EHICH _Power＝EHICH _PowerRatio×EHICH _PowerMax×α+β

P _max: the maximum transmission power of UE;

P _{uPH_Max}: the transmission power obtaining current UE after the minimum UPH value in UE all in community is converted;

EHICH _powerMax: the maximum transmission power of EHICH channel, unit is dB;

EHICH _power: the power output of EHICH channel, unit is dB;

α: compensation coefficient, α ∈ [0.1,2], is defaulted as 1;

β: improvement factor, can customize, and is defaulted as 3dB;

Above power unit is milliwatt, needs to be converted into dB when EHICH exports.

Then, step 107 is skipped to.

Step 104:E-HICHERRORRATE calculates, and whether the data on assessment EHICH are effectively received, and the ACK/NACK that can be sent by NodeB side in the same HARQ process of same user indicates and judges in conjunction with the logical relation between the RSN that EPUCH carries;

A self-defined ERRORRATE being specific to E-HICH is carried out by the relation between EHICH channel and E-UCCH channel, this is because after the resource received from UE as NodeB, ACK/NACK information is sent to the UE belonging to it by E-HICH, because there is strict timing relationship in E-HICH channel and E-UCCH channel, and carry in E-UCCH channel and pass resource identification to some extent, so just need not carry resource indication information in E-HICH channel, UE also knows the confirmation carried out which resource.

When a nack is received, UE data retransmission, now will identify in the RSN position of E-UCCH channel is which time retransmits, and corresponding concrete resource each+1, after exceeding maximum retransmission, counts again; After receiving ACK, RSN resets, if RSN non-zero is also transmitting procedure occurred mistake.

By each UE ERRORRATE within a certain period of time just can be obtained to the RSN of Resource Block, by setting ERRORRATETarget, adjust the bias power of E-HICH thereupon, just can introduce dynamic open Loop Power control mechanism.

E-PUCH resource ERRORRATE computational methods:

$\mathrm{ErrorRate}=\frac{\mathrm{ErrorCounter}}{\mathrm{ErrorCounter}+\mathrm{CorrectCounter}}\&times;100$

ErrorCounter (error of transmission counter) acts in HARQ process corresponding to all subscriber equipmenies, and this counter initialization is 0, and add up in sliding window, maximum is ErrorCounter_Max:

Below the RSN that NodeB sends NACK and receives does not meet during rule, error of transmission counter is from adding once, and n is number of retransmissions,

$\left\{\begin{array}{cc}{\mathrm{RSN}}_{\mathrm{New}}\&le;{\mathrm{RSN}}_{\mathrm{Old}}& n<3\\ {\mathrm{RSN}}_{\mathrm{New}}\&NotEqual;2+\left(n\mathrm{mod}2\right)& n\&GreaterEqual;3\end{array}\right..$

CorrectCounter (transmitting correct counter) acts in HARQ process corresponding to all subscriber equipmenies, and this counter initialization is 0, and add up in sliding window, maximum is CorrectCounter_Max:

When the RSN_NEW=RSN_OLD=0 that NodeB sends ACK and receives, transmit correct counter from adding once;

Below the RSN that NodeB sends NACK and receives meets during rule, transmit correct counter from adding once:

$\left\{\begin{array}{cc}{\mathrm{RSN}}_{\mathrm{New}}\&le;{\mathrm{RSN}}_{\mathrm{Old}}& n<3\\ {\mathrm{RSN}}_{\mathrm{New}}\&NotEqual;2+\left(n\mathrm{mod}2\right)& n\&GreaterEqual;3\end{array}\right..$

Step 105: determine power control step-length;

BLERTarget according to system configuration determines required power control step-length with proportional manner, such as BLERTarget is 5%, so raising power step size be (N*0.05) dB, downward power step size to be (1-N*0.05) dB, N be greater than 0 integer.Then, step 106 is entered.

Step 106: compare according to ERRORRATE and error threshold value, obtain output power back off.When the statistical sample of ERRORRATE does not meet predetermined quantity, then jump directly to step 107, if met, then calculate output power back off value below carrying out;

If ERRORRATE > is U_Target, then increase the transmitting power of 1 power per liter step-length, U_Target is power per liter thresholding, is defaulted as 10%;

If ERRORRATE < is D_Target, then reduce the transmitting power that 1 is fallen power step size, power threshold falls in D_Target, is defaulted as 5%;

Then step 107 is entered.

Step 107: export the rear E-HICH transmitting power of adjustment.

The invention provides a kind of method and base station of control E-HICH transmitting power, power for realizing E-HICH controls, compared with prior art, with crossing the cooperation of Open-closed-loop power, both ensure that effective transmission of information, improve again the accuracy that power controls further, reduce unnecessary interference power, improve network performance.

The all or part of step that one of ordinary skill in the art will appreciate that in said method is carried out instruction related hardware by program and is completed, and described program can be stored in computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Correspondingly, each module/unit in above-described embodiment can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

These are only the preferred embodiments of the present invention; certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.

Claims (10)

1. a method for control E-HICH transmitting power, comprising:

The user power surplus UPH of the subscriber equipment of all configuration high-speed uplink packet access HSUPA business in acquisition Serving cell, base station;

Described base station arranges the Initial Trans of E-HICH according to the maximum transmission power of UPH, UE and the maximum transmission power of E-HICH;

Described base station is according to the maximum transmission power P of UPH, UE _maxwith the maximum transmission power EHICH of E-HICH _powerMaxthe Initial Trans EHICH of E-HICH is set _powercomprise:

Calculate bias power EHICH _powerRatio, wherein,

EHICH _Power＝EHICH _PowerRatio×EHICH _PowerMax×α+β；

Wherein, P _{uPH_Max}for the power after the minimum UPH conversion in subscriber equipmenies all in Serving cell; α is compensation coefficient, α ∈ [0.1,2]; β is improvement factor.

2. the method for claim 1, is characterized in that: after described base station arranges the Initial Trans of E-HICH, in the process of transmission data, comprising:

The transmission confirmation of the hybrid automatic repeat request process mark HARQID of the subscriber equipment of all configuration HSUPA business in acquisition Serving cell, described base station, retransmission sequence number RSN information that subscriber equipment carries on ascending control channel and described base station;

Whether the data that described base station sends according to subscriber equipment are correctly transmitted, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power.

3. method as claimed in claim 2, it is characterized in that: whether the data that described base station sends according to subscriber equipment are correctly transmitted, and described HARQID, described RSN information and described transmission confirmation dynamically arranges E-HICH transmitting power, comprising:

The data that described base station sends according to subscriber equipment whether by correct transmission, described HARQID, described RSN information and described transmission confirmation, the transmitted error rate of calculating subscriber equipment in corresponding HARQ instance process;

Described transmitted error rate and preset error threshold value are compared, obtains corresponding power compensating value;

E-HICH transmitting power is adjusted by described power compensating value.

4. method as claimed in claim 3, it is characterized in that: whether the data that described base station sends according to subscriber equipment by confirmation, the transmitted error rate ErrorRate of calculating subscriber equipment in corresponding HARQ instance process of correct transmission, described HARQID, described RSN information and described transmission, comprising:

Described base station calculates ErrorRate by following formula:

$ErrorRate=\frac{ErrorCounter}{ErrorCounter+CorrectCounter}\&times;100$

Wherein, ErrorCounter is error of transmission counter, and act in HARQ process corresponding to all subscriber equipmenies, ErrorCounter is initialized as 0, and counting rule is as follows:

When number of retransmissions is less than 3, described base station sends the transmission confirmation NACK of negative, but when the new RSN received is less than or equal to old RSN, ErrorCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, but the new RSN received is not equal to 2 when adding the remainder of number of retransmissions divided by 2, and ErrorCounter is from adding once;

Wherein, CorrectCounter is the correct counter of transmission, and act in the same HARQ process of same subscriber equipment, CorrectCounter is initialized as 0, and counting rule is as follows:

When described base station sends the transmission confirmation ACK determined, when the new RSN received equals old RSN and equals 0, CorrectCounter is from adding once;

When number of retransmissions is less than 3, described base station sends NACK, and when new RSN is greater than old RSN, CorrectCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, and the new RSN received equals 2 when adding the remainder of number of retransmissions divided by 2, and CorrectCounter is from adding once.

5. the method as described in claim 3 or 4, is characterized in that: describedly described transmitted error rate and preset error threshold value are compared, and obtains corresponding power compensating value, adjusts E-HICH transmitting power, comprising by described power compensating value:

If described transmitted error rate is greater than the first error threshold value, then obtaining described power compensating value is one or more preset power per liter step values, then current E-HICH transmitting power is added this one or more preset power per liter step value;

If described transmitted error rate is less than the second error threshold value, then obtains described power compensating value and be 1 and preset fall power step size value, then current E-HICH transmitting power is deducted this 1 and preset fall power step size value;

Described first error threshold value is greater than described second error threshold value.

6. a base station, comprising:

Acquisition module, for obtaining the user power surplus UPH of the subscriber equipment of all configuration high-speed uplink packet access HSUPA business in Serving cell;

First arranges module, for arranging the Initial Trans of E-HICH according to the maximum transmission power of UPH, UE and the maximum transmission power of E-HICH;

Described first arranges module, for the maximum transmission power P according to UPH, UE _maxwith the maximum transmission power EHICH of E-HICH _powerMaxthe Initial Trans EHICH of E-HICH is set _power, comprising:

Calculate bias power EHICH _powerRatio, wherein, ${\mathrm{EHICH}}_{PowerRatio}=\frac{P_{max}-P_{UPH\_max}}{P_{Max}}:$

EHICH _Power＝EHICH _PowerRatio×EHICH _PowerMax×α+β；

Wherein, P _{uPH_Max}for the power after the minimum UPH conversion in subscriber equipmenies all in Serving cell; α is compensation coefficient, α ∈ [0.1,2]; β is improvement factor.

7. base station as claimed in claim 6, is characterized in that: also comprise second and arrange module,

Described acquisition module, also in the process of transmission data, obtain the transmission confirmation of the hybrid automatic repeat request process mark HARQID of the subscriber equipment of all configuration HSUPA business in Serving cell, retransmission sequence number RSN information that subscriber equipment carries on ascending control channel and described base station;

Whether described second arranges module, correctly transmitted for the data sent according to subscriber equipment, and described HARQID, described RSN information and described transmission confirmation dynamically arrange E-HICH transmitting power.

8. base station as claimed in claim 7, is characterized in that: described second arranges module comprises:

First module, for the data that send according to subscriber equipment whether by correct transmission, described HARQID, described RSN information and described transmission confirmation, the transmitted error rate of calculating subscriber equipment in corresponding HARQ instance process;

Second unit, for described transmitted error rate and preset error threshold value being compared, obtains corresponding power compensating value;

Unit the 3rd, for adjusting E-HICH transmitting power by described power compensating value.

9. base station as claimed in claim 8, is characterized in that:

Described first module, specifically for calculating ErrorRate by following formula:

$ErrorRate=\frac{ErrorCounter}{ErrorCounter+CorrectCounter}\&times;100$

Wherein, ErrorCounter is error of transmission counter, and act in HARQ process corresponding to all subscriber equipmenies, ErrorCounter is initialized as 0, and counting rule is as follows:

When number of retransmissions is less than 3, described base station sends the transmission confirmation NACK of negative, but when the new RSN received is less than or equal to old RSN, ErrorCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, but the new RSN received is not equal to 2 when adding the remainder of number of retransmissions divided by 2, and ErrorCounter is from adding once;

Wherein, CorrectCounter is the correct counter of transmission, and act in HARQ process corresponding to all subscriber equipmenies, CorrectCounter is initialized as 0, and counting rule is as follows:

When described base station sends the transmission confirmation ACK determined, when the new RSN received equals old RSN and equals 0, CorrectCounter is from adding once;

When number of retransmissions is less than 3, described base station sends NACK, and when new RSN is greater than old RSN, CorrectCounter is from adding once;

When number of retransmissions is more than or equal to 3, described base station sends NACK, and the new RSN received equals 2 when adding the remainder of number of retransmissions divided by 2, and CorrectCounter is from adding once.

10. base station as claimed in claim 8 or 9, is characterized in that:

Described second unit, if specifically for judging that described transmitted error rate is greater than the first error threshold value, then obtaining described power compensating value is one or more preset power per liter step values; If judge, described transmitted error rate is less than the second error threshold value, then obtain described power compensating value and be 1 and preset fall power step size value, described first error threshold value is greater than described second error threshold value;

Described Unit the 3rd, specifically for adding this one or more preset power per liter step value by current E-HICH transmitting power; Or current E-HICH transmitting power deducted this 1 and preset fall power step size value.