GB2492600A

GB2492600A - Transmission power control based on currently used bandwidth and comparison to power limits

Info

Publication number: GB2492600A
Application number: GB201111744A
Authority: GB
Inventors: Petteri Kalle Kela; Tommi Tapani Kangassuo; Petteri Mika Heinonen; Jonathan Michael Keast
Original assignee: Renesas Mobile Corp
Current assignee: Renesas Electronics Corp
Priority date: 2011-07-08
Filing date: 2011-07-08
Publication date: 2013-01-09
Anticipated expiration: 2031-07-08
Also published as: GB2492600B; GB201111744D0

Abstract

A method and apparatus is provided for uplink transmission power control in discontinuous data transfer in a wireless communication network. In situations where a user equipment (UE) receives a transmission power control (TPC) command from a base station for an uplink shared or control channel (PUSCH or PUCCH) but does not receive an uplink resource allocation, the power may exceed prescribed limits. Therefore the UE calculates its transmission power based on currently used bandwidth, and a check is made as to whether a transmission power limit has been reached based on the calculated transmission power. The calculation can use current resource block allocation or pre-defined (e.g. minimum or maximum) allocation. The power calculation can alternatively use data relating to the format of the channel e.g. the number of bits used for channel quality information and HARQ.

Description

INTELLECTUAL

. .... PROPERTY OFFICE Applicalion No. GB1111744.7 RTIN4 DaleS November2011 The following terms are registered trademarks and should be read as such wherever they occur in this document: 3GPP Intellectual Properly Office is an operaling name of Ihe Patent Office www.ipo.gov.uk METHOD AND APPARATUS FOR CONTROLLiNG TRANSMISSION POWER

Technical Field

The present application relates generally to an apparatus and method for controlling transmission power. In embodiments, the invention has particular application to uplink transmission power control in discontinuous data transfer.

Background

The following meanings for the abbreviations used in this specification apply: 3GPP The 3rd Generation Partnership Project BS Base Station CRC Cyclic Redundancy Check DCI Downlink Control Information E-UTRAN Evolved Universal Terrestrial Radio Access Network HARQ hybrid automatic repeat request PDCCH Physical Downlink Control Channel PUCCH Physical Uplink Control Channel PUSCIi Physical Uplink Shared Channel RNTI Radio Network Temporary Identity RSRP Reference Signal Received Power SRS Sounding Reference Symbol TPC Transmission Power Control UE User Equipment According to 3GPP, Technical Specification 36.2 13 V9.3.0 (September 2010); 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 9), hereinafter "document [1]", the setting of the UE Transmit powerPpuscH for the physical uplink shared channel (PIJSCH) transmission in subframe I is defined by: USCH (i) = iuin i[A)( 101og10(A111 (I)) + F0 PUSCH(J) + cr(j) FL + ATF(i) f(O} [dthn] where, * MAx is the configured UE transmitted power.

* is the bandwidth of the PIJSCI-1 resource assignment expressed in number of resource blocks valid for subframc /.

* is a parameter composed of the sum of a cell-specific nominal component N0Mf'\A (j) provided from higher layers forj=O and I and a UE-specific component P0 provided by higher layers for frO and I. For PUSCH (rc)transmissions corresponding to a semi-persistent grant then j0, for PUSCH (re)transmissions corresponding to a dynamic scheduled grant tlien/=/ and for FUSCH (re)transniissions corresponding to the random access response grant then j2. P-uEpuScn(2)=° and where the parameter PREAMBLE INITIAL RECEIVED TARGET P0 WER (1in&i:) a n d A FRE.4 till 1: -Mg1 arc signalled from higher layers.

* Forj 0 or 1, a e 0,0.4,0.5,0.6,0.7,0.8,0.9, } is a 3-bit cell-specific parameter provided by higher layers. For j2, a(j) = 1.

* FL is the downlink pathloss estimate calculated in the UE in dB and FL = referenceSignalPower -higher layer filtered RSRP, where referenceSignal Power is provided by higher layers.

* ST ()r lO1log 0((2M' -up)' ) for K5 = 1.25 and 0 for K5 = 0 where Kç is given by the UE-specific parameter deitaMCS-Enabled provided by higher layers o AlP!? = / N for control data sent via PUSCH without IJL-SCH data and K1 for other cases.

where c is the number of code blocks, K5 is the size for code block r, o,, is the number of CQI bits including CRC bits and lYRE is the number of resource elements determined as V -w-PUSCH_iniciaI ?V PTECH -initial / liE -as Uvrnb o = iCL for control data sent via PUSCH without UL-SCH data and 1 for other cases.

6PUSfl] is a UE-specific correction value, also rcfcrred to as a TPC command and is included in PDCCH with DCI format 0 or jointly coded with other TPC commands in PDCCH with DCI format 3/3A whose CRC parity bits are scrambled with TPC-PUSCH-RNTI. The current PUSCI-I power control adjustment state is given by 1(1) which is defined by: o f(i) = fU -1)+öc 0 -K20) if accumulation is enabled based on the UE-specific parameter Accumulation-enabled provided by higher layers or if the TPC command 6pUSC11 is includcd in a PDCCH with DCI format 0 where the CRC is scrambled by the Temporary C-RNTI * where signalled on PDCCH with DCI format 0 or 3!3A on subframe i -K1T511, and where [(0) is the first value after reset of accumulation.

* The value of 15 * For FDD,K,,h = 4 * For TDD UL/DL configurations 1-6, Kpyç1g is given in Table 5.1.1.1-1 in document [1j.

* For TDD IJL!DL configuration 0 o If the PIJSCH transmission in subframe 2 or 7 is scheduled with a PDCCH of DCI format 0 in which the LSB of the UL index is set to 1, = 7 a For all other PIJSCI-1 transmissions, Kpuccu giveninTable5.1.1.1-1 in document [1].

* The UE attempts to dccode a PDCCH of DCI format 0 with the UE's C-RNTI or SPS C-RNTI and a PDCCH of DCI format 3/3A with this UE's TPC-PUSCH-RNTI in every subframe except when in DRX * If DCI format 0 and DCI format 3/3A are both detected in the same subframe, then the UE shall use the öPTJsnT provided in DCI format 0.

* OIIJSCH =0dB for a subframe where no TPC command is decoded or where DRX occurs or! is not an uplink subframe in TDD.

* The bPUSCH dB accumulated values signalled on PDCCH with DCI format 0 arc given in Table 5.1.1.1-2 in document [1]. If the PDCCI-1 with DCI format 0 is validated as a SPS activation or release PDCCH, then is 0dB.

* The 5PTJSflT dB accumulated values signalled on PDCCH with DCI format 3/3A are one of SETI givenì in Table 5.1.1.1-2 in document [1j or SET2 given in Table 5.1.1.1-3 in document [1j as determined by the parameter TPC-Index provided by higher layers.

* If UE has reached maximum power, positive TPC commands shall not be accumulated * If UE has reached minimum power, negative TPC commands shall not be accumulated * liE shall reset accumulation * when J-LEPLSCH value is changed by higher layers * when the LiE receives random access response message a f@)=SPTJSCH(i-KpuscH) if accumulation is not enabled based on the UE-specific parameter Accumulation-enabled provided by higher layers * where (PUSCHO-KFUSL)was signalled on PDCCI-1 with DCI format 0 on subframe / - * The value of s * For FDD, K111 = 4 * For TDD UL!DL configurations h6, Kpyç1g is given in Table 5.1.1.1-1 in document [fl.

* For TDD UL/DL configuration 0 a Ifthe PUSCI-l transmission in subframe 2 or 7 is scheduled with a PDCCHof DCI format 0 in which the LSB of the IJL index is set to 1, = 7 o For all other PUSCH transmissions, KFUScH is given inTable 5.1.1.1-1 in document [1].

* The 5PTJSCH dB absolute values signalled on PDCCH with DCI format 0 are given in Table 5.1.1.1-2 in document [1]. lfthc PDCCH with DCI format 0 is validated as a SPS activation or release PDCCH, then 6PUSCH is 0dB.

f@) = [(i-i) for a subframe where no PDCCH with DCI format 0 is decoded or where DRX occurs or i is not an up link subframe in TDD.

o For both types of f(*) (accumulation or current absolute) the first value is set as follows: * If QUEPUSCIJ value is changed by higher layers, * * Else * [(0) = arnppmsg2 o where öm,,2 is the TPC command indicated in the random access response, and a is provided by higher layers and corresponds to the total power ramp-up from the first to the last preamble.

As described above, Qi) is the current power control adjustment state accumulated from received TPC commands.

Also, as described above, there are limitations in E-TJTRAN if the UE has reached a maximum or a minimum power. In particular, TPC commands shall not be accumulated to the current power control adjustment state in certain situations.

Namely: * If UE has reached maximum power, positive TPC commands shall not be accumulated; and * If UE has reached minimum power, negative TPC commands shall not be accumulated.

In practice, this means that f(i) is not accumulated with TPC commands, if the output power calculation has reached the upper or lower limit with the previous power control adjustment state f(i-1).

In order to calculate the UE Transmit power, the parameter (0 is needed, which is a resource allocation-dependent parameter. As mentioned above, 11pT:scrTO) is the bandwidth of the PUSCH resource assignment expressed in number of resource blocks valid for subframe /.

In a similar manner, according to document [1], the setting of the tiE Transmit power PUCCH for the physical uplink control channel (PIJCCH) transmission in subframc I is defined by: 6UCcH (i) = mm + FL * h(n(QJ JIARQ)* AF PUCC ()* gQ)} [dBrij where * PM is the configured tiE transmitted power.

* The parameter FpJccff(F) is provided by highcr layers. Each Ap1j11(F) value corresponds to a PIJCCH format (F) relative to PUCCH format Ia, where each PIJCCH format (F) is defined in Table 5.4-1 [3].

* is a PUCCH format dependent value, where fl(Q[ corresponds to the number of information bits for the channel quality information and JJA]?Q is tile number of HARQ bits.

o For PUCCH format 1,la and lb 11(n(vJ,nJIIRQ)= a o For PUCCH format 2, 2a, 2b and normal cyclic prefix 2 ( )_ ioio0[1] fnCOI »=4 CQJ'HARQ -4 0 otherwise

S

o For PUCCH format 2 and extended cyclic prefix j lOloo --I 1cei HAJ?() 4 1) [0 otherwise O_pUccH is a parameter composed of the sum of a cell-specific parameter O_NOM[NAI. FITCH provided by higher layers and a UE-specific component J_LE_PUCCH provided by higher layers.

* is a tiE-specific correction value, also referred to as a TPC command, included in a PDCCI-1 with DCI format lA/I B/i D/i/2A/2/2B or sent jointly coded with other LJE-specific PUCCH correction values on a PDCCH with DCI format 3/3A whose CRC parity bits are scrambled with TPC-PUCCH-RNTI.

o The tiE attempts to decode a PDCCH of DCI format 3/3A with the tiE's TPC-PUCCI-l-RNTI and one or several PDCCHs of DCI format 1AIIB/ID/l/2A/2/2B with the liE's C-RNTI or SPS C-RNTI on every subframe except when in DRX.

a Ifthe UE decodes a PDCCH with DCI format IA/IB/1D/1/2A/2/2B and the corresponding detected RNTI equals the C-RNTI or SPS C-RNTI of the tiE, the liE shall use the provided in that PDCCH. else

* ifthe tiE decodes a PDCCH with DCI format 3/3A, the tiE shall use the provided in that PDCCH else the UE shall set = 0 dB. Al 1

o g) = ö-(i-/ç) where g(i) is the current PUCCH power m-O control adjustment state and where g(O) is the first value after reset.

* ForFDD, M =1 and k0 =4.

* For TDD, values of Al and km are given in Table 10.1-1 of document [1].

* The dB values signalled on PDCCH with DCI format IAI1B/ID/1/2A/2/2B arc given in Table 5.1.2.1-1. If the PDCCH with DCI format 1/IA/2/2A/2B is validated as an SPS activation PDCCH, or the PDCCFI with DCI format IA is validated as an SPS release PDCCH, then is 0dB.

* The 6PUCCH dB values signalled on PDCCH with DCI format 3/3A are given in Table 5.1.2.1-1 or in Table 5.1.2.1-2 of document [1] as semi-statically configured by higher layers.

* If kJJF_PUCCII value is changed by higher layers, * g(O)=O * Else * g(O) = AI'mtj?,p + a where 8m.sg2 is the TI'C command indicated in the random access response, and o AJn?pq) is the total power ramp-up from the first to the last preamble provided by higher layers.

* If UE has reached maximum power, positive TPC commands shall not be accumulated.

* If liE has reached minimum power, negative TPC commands shall not be accumulated.

* liE shall reset accumulation * when a_uE PUCCH value is changed by higher layers * when the UE receives a random access response message g) = -1) if I is not an uplink subframe in TDD.

The network may send TPC commands for PTJCCH in DCI format 3/3A even if there is no PUCCH transmissions occurring. In order to check if maximum or minimum PUCCFI transmission power has been reached according to document [11, hnCQJ flQ)+ AF puccil (F) is needed.

Further, according to document [I], the setting of the UE Transmit power SRS for the Sounding Reference Symbol transmitted on subframe i is defined by: sRsO) = 1nin{h4AX, SRS OFFSEt + lOlog10(M55)-i-o_puscHU) +a(j) PL + f(i)} [dBrn] where * ftM is the configured IJE transmitted power.

* For K =t*25'SRs_c1*SE*F is a 4-bit UE specific parameter semi-statically configured by higher layers with 1dB step size in the range [-3, 12] dB.

* For K = 0, "SKS OFFSET is a 4-bit IJE specific parameter semi-statically configured by higher layers with 1.5 dB step size in the range [-10.5,12] dB * AI is the bandwidth of the SRS transmission in subframe i expressed in number of resource blocks.

* f(i) is the current power control adjustment state for the PUSCH, as described above.

* o_pLTscHO) and a (j) are parameters as defined above, where j = 1.

As mentioned above, according to document [1], a TPC command for PUSCH can be included in PDCCH with DCI format 0 or jointly coded with other TPC commands in PDCCH with DCI format 3/3A whose CRC parity bits are scrambled with TPC-PTJSCH-RNTI.

However, if a TPC command is received in PDCCH with DCI format 3/3A, there may be a case in which a PIJSCH resource assignment is not received for the same subframe in DCI format 0.

If the UE rcccivcs a TPC command for PUSCH, it shall adjust the uplink power control state accordingly. This requires certain parameters to calculate the limits for accumulation when transmission power has reached the maximum or minimum power.

If the LIE receives a TPC command for PUCCI-I, it shall adjust the uplink power control state accordingly. This requires certain parameters to calculate the limits for accumulation.

I-lowcver, if there is no UL allocation for PUSCI-1 transmission or there is no PIJCCH transmission for the given subframc for which the accumulation is set, not all the parameters required for transmit power calculation are present. If it is not checked or is checked with incorrect parameters whether maximum/minimum transmission power level limits have been reached or not for uplink power control adjustment state, thc following PUSCH transmissions may be sent with invalid transmission power.

Summary

According to a first aspect of the present invention, there is provided a method for controlling transmission power, the method comprising: calculating, on a processor at a user equipment, a transmission power based on currently used bandwidth, and checking, on the processor at the user equipment, whether a transmission power limit has been reached by the calculated transmission power.

According to a second aspect of the present invention, there is provided apparatus for controlling transmission power, the apparatus comprising: a processing system constructed and arranged to cause: a user equipment to calcu'ate a transmission power based on currently used bandwidth, and the user equipment to check whether a transmission power limit has been reached by the calculated transmission power.

The processing system may comprisc at Icast one processor and at least one memory including computer program codc.

According to a third aspcct of the prescnt invention, there is providcd apparatus for controlling transmission power, the apparatus comprising: a processing system constructed and arranged to: calcu'ate a transmission power based on channel format and bit number dependent values, and check whether a transmission power limit has been reached based on the calculated transmission power.

Brief Description of the Drawings

The above and other objects, features, details and advantages will become more frilly apparent from the following detailed description of example embodiments which is to be taken in conjunction with the appended drawings, in which: Fig. 1 shows a signalling diagram for a method for calculating the transmission power; Fig. 2 shows a diagram illustrating a change of transmission power over time; Fig. 3 shows a diagram illustrating a change of transmission power over time where the transmission power reaches a maximum transmission power; Fig. 4 shows a diagram illustrating a change of transmission power over time where the transmission power reaches a minimum transmission power; Fig. 5 shows schematically an example of an apparatus according to certain S embodiments of the present invention; and Fig. 6 shows a schematic flowchart of an example of a method according to certain embodiments of the present invent ion.

Detailed Description

In the following, embodiments of the present invention are described by referring to general and specific examples of the embodiments. It is to be understood, however, that the description is given by way of example only, and that the described embodiments are by no means to be understood as limiting the present invention thereto.

In the following description of embodiments of the present invention, the present invention is described as being applied to IJTRAN/E-UTRAN. However, it is noted that this is merely an example and that the invention is applicable to other radio access tecimologies using network controlled power adjustment.

In broad terms, the liE of specific embodiments calculates its uplink transmission power and the eNodeB can adjust the liEs transmission power by sending Transmission Power Control (TPC) commands that accumulate to the power control adjustment state used in the calculation, with the behaviour of the power control adjustment state being changed as described herein.

Fig. 1 illustrates a method for calculating a transmission power. As shown in Fig. 1, the UE first calculates the transmission power and uses the calculated transmission power for signalling on shared/control channels, i.e. PUSCH or PUCCI-!.

Additionally, transmission power can be calculated for the Sounding Reference S3mbol (SRS) transmission. Then, the base station sends to the UE a TPC command.

Based on the TPC command, the UE re-calcu'ates the transmission power and uses the re-calculated transmission power for PUSCH, PUCCH and SRS signalling.

Fig. 2 illustrates the change of the transmission power over time. As shown in Fig. 2, the TPC command is added to the current transmission power and thus the transmission power rises.

Fig. 3 shows a case in which thc transmission power rcachcs a maximum transmission power. As is shown in Fig. 3, although the TPC commands are received and should be added to the current transmission power, the TPC commands (i.e. the power control adjustment statc) cannot be accumulated to the transmission power, once the maximum transmission power has been reached. Thus, TPC commands are not accumulated when the power calculation has reached the maximum power limit.

In a similar manner, Fig. 4 shows a case in which the transmission power reaches a minimum transmission power. As is shown in Fig. 4, although the TPC commands are received and should be added to the current transmission power, the TPC commands (i.e. the power control adjustment state) cannot be accumulated to the transmission power if the minimum transmission power has been reached. Thus, TPC commands are not accumulated when power calculation has rcachcd the minimum power limit.

According to an embodimcnt of the present invention, in order to check if the maximum or minimum transmission power has been reached for PLJSCH, which limits the accumulation of the power control adjustment state as shown in Figs. 3 and 4, the transmission power for PUSCH can be calculated based on a predefined resource block assignment for currently used bandwidth. The predetermined resource block assignment is, for example, a minimum/maximum resource block assignment.

When checking if the maximum power limit has been reached, the minimum resource block assignment can be used. Further, when checking if minimum power limit has been reached, the maximum resource block assignment can be used.

S One option can be to use the previous resource block allocation for the calculation.

Another option is to use the previously stored PUSCI-1 transmission power with accumulation addcd from a received TPC command.

As described above, the network may send TPC commands for PUSCH in DCI format 3!3A without thc uplink resource block allocation in DCI format 0. For example, TPC commands for PUSCH can be based on SRS transmissions. In order to check if the maximum or minimum PUSCH transmission power has been reached according to the above described formula defined in document [1], MPUSCH(i)is needed. However, as mentioned above, there might be cases in which MPUSCH (1) is not received. Thus, there might be a case in which not all parameters for controlling the transmission power arc assigned.

According to embodiments of the present invention, there are proposed thrcc methods in order to check whether a minimum or maximum transmission power has been reached.

In the first method, a predefined bandwidth-dependent value is used. The value can be for example a maximum or minimum value for resource block assignment. That is, when checking if the maximum transmission power limit has been reached, a minimum resource block assignment can be used for example, and when checking if the minimum transmission power limit has been reached, a maximum resource block assignment can be used for example.

In the second method, the latest resource block assignment for PUSCH is used in the calculation.

In the third method, the latest calculated PUSCH transmission power accumulated with received TPC command is used.

Accordingly, a base station can safely update accumulated power control adjustment with DCI formats 3 and 3A without granting uplink allocations to the UE.

The UE can propcrly limit power control adjustment accumulation so that the predicted calculated transmission power does not cross its limits even when resource block allocations are not received.

In the case of PIJCCH, there are also proposed three methods in order to check whether a minimum or maximum transmission power has been reached.

In the first method, predefmed PUCCH format and bit number dependent values are used. The values can be such that they will result in the maximum or m[nimum value for h and forAF p1c11(F). That is, when checking if the maximum transmission power limit has been reached, minimum values for h and A can be used for example, and when checking if the minimum transmission power limit has been reached, maximum values can be used for example.

In the second method, the latest h and AFPUCCH(F) values for PUCCH in the calculation are used.

In the third method, the latest calculated PIJCCH transmission power accumulated with received TPC command is used.

Fig. 5 shows schematically an example of an apparatus according to certain embodiments of the present invention. One option for implementing this example apparatus would be by way of a component in a handset such as user equipment according to E-UTRAN.

Specifically, as shown in Fig. 5, the example apparatus 10 comprises at least one processor 11 and at least one memory 12 including computer program code, the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to perform calculating a transmission power based on currently used bandwidth, and checking whether a transmission power limit has been reached based on the calculated transmission power. According to another embodiment, the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus to perform calculation a transmission power based on channel format and bit number dependent values.

Additionally, the apparatus may comprise a transceiver unit (not shown) configured to receive a TPC command from a base station and to send various data to the base station.

In the foregoing exemplary description of the apparatus, only the units that are relevant for understanding the principles of the invention have been described using functional blocks. The apparatus may comprise further units that are necessary for its respective operation. However, a description of these units is omitted in this specification. The arrangement of the functional blocks of the devices is not construed to limit the invention, and the functions may be performed by one block or thither split into sub-blocks.

Fig. 6 shows a schematic flowchart of an example of a method according to certain embodiments of the present invention. That is, as shown in Fig. 6, this example method comprises calculating, at step S21, a transmission power based on currently used bandwidth or based on channel format and bit number dependent

S

values, and checking, at step 522, whether a transmission power limit has been reached based on the calculated transmission power.

Additionally, the method may include receiving (not shown) a TPC command from a base station and sending (not shown) various data to the base station.

One option for performing the example of a method according to certain embodiments of the present invention would be to use the apparatus as described above or a modification thereof which becomes apparent from the embodiments as dcscribed above.

For the purpose of thc present invention as dcscribcd herein above, it should be noted that -method steps likely to be implemented as software code portions and being run using a processor or several processors at a user equipment (as examples of devices, apparatus and/or modules thereof, or as examples of entities including apparatus and/or modules therefore), are software code independent and can be specified using any known or future developed programming language as long as the functionality defined by the method steps is preserved; -generally, any method step is suitable to be implemented as software or by hardware without changing the idea of the embodiments and its modification in terms of the functionality implemented; -method steps and/or devices, units or means likely to be implemented as hardware components at thc above-defined apparatuses, or any module(s) thercof, (e.g. devices carrying out the functions of the apparatus according to the embodiments as described above) are hardware independent and can be implemented using any known or fi.iture developed hardware technology or any hybrids of these, such as MOS (Metal Oxide Semiconductor), CMOS (Complementary MOS), BiMOS (Bipolar MOS), BiCMOS (Bipolar CMOS), ECL (Emitter Coupled Logic), TTL (Transistor-Transistor Logic), etc., using for example ASIC (Application Specific IC (Integrated Circuit)) components, FPGA (Field-programmable Gate Arrays) components, CPLD (Complex Programmable Logic Device) components or DSP (Digital Signal Processor) components; -devices, units or means (e.g. the above-defined apparatuses and user equipments, or any one of their respective units/means) can be implemented as individual devices, units or means, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device, unit or means is preserved; -an apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) moduic comprising such chip or chipsct; this, however, does not exclude the possibility that a functionality of an apparatus or module, instead of being hardware implemented, be implemented as software in a (software) module such as a computer program or a computer program product comprising executable sofiware code portions for execution/being run on a processor or on several processors; -a device may be regarded as an apparatus or as an assembly of more than one apparatus, whether functionally in cooperation with each other or functionally independently of each other but in a same device housing, for example.

In general, it is to be noted that respective functional blocks or elements according to above-described aspects can be implemented by any known means, either in hardware and/or software, respectively, if it is adapted to perform the described functions of the respective parts. The mentioned method steps can be realized in individual functional blocks or by individual devices, or one or more of the method steps can be realized in a single functional block or by a single device.

Generally, any method step is suitable to be implemented as software or by hardware without changing the idea of the present invention. Devices and means can be implemented as individual devices, but this does not exclude that they are implemented in a distributed fashion throughout the system, as long as the functionality of the device is preserved. Such and similar principles are to be considered as known to a skilled person.

Software in the sense of the present description comprises software code as such comprising code means or portions or a computer program or a computer program product for performing the respective functions, as well as software (or a computer program or a computer program product) embodied on a tangible medium such as a computer-readable (storage) medium having stored thereon a respective data structure or code means/portions or embodied in a signal or in a chip, potentially during processing thereof The above embodiments are to be understood as illustrative examples of the invention. Further embodiments of the invention are envisaged. It is to be understood that any feature described in relation to any one embodiment may be used alone, or in combination with other features described, and may also be used in combination with one or more features of any other of the embodiments, or any combination of any other of the embodiments. Furthermore, equivalents and modifications not described IS above may also be employed without departing from the scope of the invention, which is defmed in the accompanying claims.

Claims

<claim-text>CLAIMS1. A method for controlling transmission power, the method comprising: calculating, on a processor at a user equipment, a transmission power based on currently used bandwidth, and checking, on the processor at the user equipment, whether a transmission power limit has been reached by the calculated transmission power.</claim-text> <claim-text>2. A method according to claim 1, whercin the calculating a transmission power is based on a predefined resource block assignment.</claim-text> <claim-text>3. A mcthod according to claim I or claim 2, comprising: calculating a minimum transmission power based on a maximum resource block assignment, and checking whether a minimum transmission power limit has been reached based on the calculated minimum transmission power.</claim-text> <claim-text>4. A method according to any ofclaims Ito 3, comprising: calculating a maximum transmission power based on a minimum resource block assignment, and checking whcther a maximum transmission power limit has been reached based on the calculated maximum transmission power.</claim-text> <claim-text>5. A method according to any of claims I to 4, wherein the transmission power is calculated based on a previous resource block assignment.</claim-text> <claim-text>6. A method according to any of claims Ito 5, wherein the transmission power is calculated based on a previously calculated transmission power accumulated with a transmission power control command received from a base station.</claim-text> <claim-text>7. Apparatus for controlling transmission power, the apparatus comprising: a processing system constructed and arranged to cause: a user equipment to calculate a transmission power based on currently used bandwidth, and the user equipment to check whether a transmission power limit has been reached by the calculated transmission power.</claim-text> <claim-text>8. Apparatus according to claim 7, wherein the processing system is constructed and arranged such that the calculating a transmission power is based on a predefined resource block assignment.</claim-text> <claim-text>9. Apparatus accordiiig to claim 7 or claim 8, wherein the processing system is constructed and arranged to cause: calculating a minimum transmission power based on a maximum resource block assignment, and checking whether a minimum transmission power limit has been reached based on the minimum calculated transmission power.</claim-text> <claim-text>10. Apparatus according to any of claims to 9, wherein the processing system is constructed and arranged to cause: calculating a maximum transmission power based on a minimum resource block assignment, and checking whether a maximum transmission power limit has been reached based on the maximum calculated transmission power.</claim-text> <claim-text>11. Apparatus according to any of claims 7 to 10, wherein the processing system is constructed and arranged to cause: calculating the transmission power based on a previous resource Mock assignment.</claim-text> <claim-text>12. Apparatus according to any of claims 7 to 11, wherein the processing system is constructed and arranged to cause: calculating the transmission power based on a previously calculated transmission power accumulated with a transmission power control command received from a base station.</claim-text> <claim-text>13. Apparatus for controlling transmission power, the apparatus comprising: a processing system constructed and arranged to: calculate a transmission power based on channel format and bit number dependent values, and check whether a transmission power limit has been reached based on the calculated transmission power.</claim-text> <claim-text>14. Apparatus according to claim 13, wherein the processing system is constructed and arranged such that the calculating a transmission power is based on predefmed values dependent on channel format and bit number.</claim-text> <claim-text>15. Apparatus according to claim 13 or claim 14, wherein the processing system is constructed and arranged to: calculate a minimum transmission power based on maximum values dependent on channel format and bit number, and check whether a minimum transmission power limit has been reached based on the calculated minimum transmission power.</claim-text> <claim-text>16. Apparatus according to any of claims 13 to 15, wherein the processing system is constructed and arranged to: calculate a maximum transmission power based on minimum values dependent on channel format and bit number, and cheek whether a maximum transmission power limit has been reached based on the calculated maximum transmission power.</claim-text> <claim-text>17. Apparatus according to any of claims 13 to 16, wherein the processing system is constructed and arranged to: calculate the transmission power based on previous channel format and bit number dependent values.</claim-text> <claim-text>18. Apparatus according to any of claims 13 to 17, wherein the processing system is constructed and arranged to: calculate the transmission power based on a previous calculated transmission power accumulated with a transmission power control command received from a base station.</claim-text> <claim-text>19. A method for controlling transmission power substantially in accordance with any of the examples as described herein with reference to the accompanying drawings.</claim-text> <claim-text>20. Apparatus for controlling transmission power substantially in accordance with any of the examples as described herein with reference to the accompanying drawings.Amended claims have been filed as follows:-CLAIMS1. A method for controlling wireless transmission power, the method comprising: calculating, on a processor at a user equipment, a wireless transmission power based on currently used bandwidth, and checking, on the processor at the user equipment, whether a wireless transmission power limit has been reached by the calculated wireless transmission power.
2. A method according to claim I, wherein the calculating a wireless transmission power is based on a predefined resource block assignment.C\J
3. A method according to claim 1 or claim 2, comprising: calculating a minimum wireless transmission power based on a maximum (.0 is resource block assignment, and checking whether a mmimum wireless transmission power limit has been reached based on the calculated minimum wireless transmission power
4. A method according to any ofclaims ito 3, comprising: calculating a maximum wireless transmission power based on a minimum resource block assignment, and checking whether a maximum wireless transmission power limit has been reached based on the calculated maximum wireless transmission power.
5. A method according to any of claims 1 to 4, wherein the wireless transmission power is calculated based on a previous resource block assignment.
6. A method according to any of claims I to 5, wherein the wireless transmission power is calculated based on a previously calculated wireless transmission power accumulated with a wireless transmission power control command received from a base station.
7. Apparatus for controlling wireless transmission power, the apparatus comprising: a processing system constructed and arranged to cause: a user equipment to calculate a wireless transmission power based on currently used bandwidth, and the user equipment to cheek whether a wireless transmission power limit has been reached by the calculated wireless transmission power.
8. Apparatus according to claim 7, wherein the processing system is constructed and arranged such that the calculating a wireless transmission power is based on a predefined resource block assignment.r
9. Apparatus according to claim 7 or claim 8, wherein the processing system is (.0 is constructed and arranged to cause: 0.calculating a minimum wifeless transmission power based on a maximum 0 resource block assignment, and checking whether a minimum wireless transmission power limit has been reached based on the minimum calculated wireless transmission power
10. Apparatus according to any of claims 7 to 9, wherein the processing system is constructed and arranged to cause: calculating a maximum wireless transmission power based on a minimum resource block assignment, and checking whether a wireless maximum transmission power limit has been reached based on the maximum calculated wireless transmission power.
II. Apparatus according to any of claims 7 to 10, wherein the processing system is constructed and arranged to cause: calculating the wireless transmission power based on a previous resource block assignment.
12. Apparatus according to any of claims? to 11, wherein the processing system is constructed and arranged to cause: calculating the wireless transmission power based on a previously calculated wireless transmission power accumulated with a wireless transmission power control command received from a base station.
1 3. A method for controlling wireless transmission power substantially in accordance with any of the examples as dcscribed herein with rcfcrcnce to the accompanying drawings.
14. Apparatus for controlling wireless transmission power substantially in C\J accordance with any of the examples as described herein with reference to the accompanying drawings. (0 (4</claim-text>