RU2474089C2 - Method and apparatus for supporting data transmission in multicarrier communication system - Google Patents

Abstract

FIELD: information technology.

SUBSTANCE: techniques for supporting data transmission on multiple carriers in a wireless communication system are described. User equipment (UE) may determine available transmission power for data transmission on multiple carriers. The UE may distribute the available transmission power to multiple carriers (e.g., using uniform power distribution, greedy filling, dilution, etc.) to obtain allocated transmission power for data for each carrier. The UE may send at least one resource request with information indicative of the allocated transmission power for each of the multiple carriers to a Node B. The UE may receive at least one resource grant with information indicative of granted transmission power for each of at least one carrier, which may be all or a subset of the multiple carriers. The UE may send data on the at least one carrier and may limit its transmission power for each carrier to the granted transmission power for that carrier.

EFFECT: transmission of data on multiple carriers to achieve good performance.

39 cl, 10 dwg

Description

This application claims the priority of provisional application US No. 61/031941, entitled "METHOD AND APPARATUS FOR MULTI-CARRIER COMMUNICATIONS IN WIRELESS COMMUNICATIONS", registered February 27, 2008, assigned to the assignee of this application and incorporated herein by reference.

BACKGROUND

I. Technical Field

The present disclosure generally relates to communications, and more specifically to methods for supporting data transmission in a multi-carrier communication system.

II. State of the art

Wireless communication systems are widely used to provide various communication services, such as voice, video, packet data, messaging, broadcasting, etc. These wireless systems can be multiple access systems that support multiple users by sharing available system resources. Examples of such multiple access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal division FDMA systems (OFDMA) and single-carrier FDMA systems (SC-FDMA).

A wireless communication system may support multi-carrier operation to increase system throughput. Each carrier can have a specific center frequency and a specific bandwidth, and can be used to send traffic data, control information, pilot, etc. Different carriers may observe different conditions in the channel and may have different bandwidths. It is desirable to support multi-carrier data transmission in such a way that good performance can be achieved.

SUMMARY OF THE INVENTION

This document describes techniques for supporting multi-carrier data transmission in a wireless communication system. In one design, a user equipment (UE) may determine the available transmit power for transmitting data on multiple carriers. The UE may distribute the available transmit power over multiple carriers (for example, using uniform power distribution, greedy padding, dilution, etc.) to obtain the allocated transmit power for the data for each carrier. The UE may send at least one resource request to Node B containing information indicating the allocated transmit power for each of the plurality of carriers. The UE may send one resource request for each carrier, or may send a resource request for more than one carrier. The UE may receive at least one resource grant containing information indicating the transmit power provided for each of the at least one carrier, which may be all or a subset of the multiple carriers. The UE may send data on at least one carrier and may limit the transmit power on each carrier to the provided transmit power for that carrier.

Various features and features of the disclosure are described in more detail below.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 shows a wireless communication system.

2A, 2B, and 2C show the distribution of transmission power by uniform distribution, greedy filling, and dilution, respectively.

Figures 3, 4 and 5 show a process for performing dilution.

6 shows a process for sending resource requests for multiple carriers.

7 shows a process for receiving resource requests for multiple carriers.

8 shows a block diagram of a UE and a Node B.

DETAILED DESCRIPTION

The techniques described herein can be used for various wireless communication systems such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and other systems. The terms “system” and “network” are often used interchangeably. A CDMA system may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), CDMA2000, etc. UTRA includes Broadband CDMA (WCDMA) and other varieties of CDMA. CDMA2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM). An OFDMA system can implement radio technology such as Advanced UTRA (E-UTRA), Ultra Mobile Broadcast (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM®, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). Long Term Development Project (LTE) 3GPP and LTE-Advanced are new versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-Advaced, and GSM are described in documents from an organization called the Third Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the “Third Generation Partnership Second Project” (3GPP2). The techniques described in this document can be used for the aforementioned radio communication systems and technologies, as well as other radio communication systems and technologies. For clarity, some of the features of the techniques are described below for WCDMA, and 3GPP terminology is used later in most of the description.

Figure 1 shows a wireless communication system 100, which may include a number of Nodes B and other network entities. For simplicity, FIG. 1 shows only one Node B 120 and one Radio Network Controller (RNC) 130. Node B may be a station that communicates with the UE, and may also be referred to as Enhanced Node B (eNB), base station, access point, etc. Node B may provide a radio area for a specific geographic area. To increase system capacity, the entire service area of Node B can be divided into many smaller areas (for example, three). Each smaller area can be served by the corresponding Node B. subsystem. In 3GPP, the term "cell" can refer to the smallest service area of Node B and / or the Node B subsystem serving this service area. The RNC 130 can connect to a set of Nodes B and provide coordination and control for these Nodes B.

UE 110 may be one of many UEs dispersed throughout the system. UE 110 may be fixed or mobile and may also be called a mobile station, terminal, access terminal, subscriber module, station, etc. UE 110 may be a cell phone, personal digital assistant (PDA), wireless modem, wireless communications device, handheld device, laptop computer, cordless telephone, wireless local area communications system (WLL) station, etc. UE 110 may communicate with Node B 120 on the downlink and uplink. The downlink (or forward link) refers to the communication line from Node B 120 to UE 110, and the uplink (or reverse link) refers to the communication line from UE 110 to Node B 120.

The system may support data transmission on multiple (K) carriers on the uplink. One or more UEs may be scheduled to transmit data on the uplink on each carrier at any given moment. A given UE may be scheduled to transmit data on the uplink up to K carriers at any given moment depending on various factors, for example, available system resources, the amount of traffic data to send the UE, the priority of the UE, the quality of service (QoS) requirements of the UE etc.

Figure 1 shows an example of data transmission on multiple carriers on the uplink. UE 110 may have traffic data to send and may send a resource request for each carrier. A resource request may also be referred to as an uplink request, a scheduling request, a scheduling information message, etc. A resource request for each carrier can carry power headroom and / or other information that can be used to schedule the UE to transmit data on the carrier. The power margin for the carrier may indicate the amount of transmit power that can be used for the carrier, and may be specified by the ratio of traffic to pilot (T2P). Power headroom can also be called power heading, etc.

Node B 120 may receive resource requests for all K carriers from UE 110 and may satisfy or reject a resource request for each carrier. Node B 120 may send a resource grant for each carrier for which a resource request is satisfied. Resource provisioning may also be referred to as resource allocation, absolute provisioning, uplink provisioning, etc. The provision of a resource for each carrier may carry the provided T2P, the selected transport format, etc. The transport format may be associated with a specific coding scheme and / or code rate, a specific modulation scheme, a certain size of a transport block, etc. The transport format may also be referred to as speed, data rate, packet format, modulation and coding scheme (MCS), etc. UE 110 may send traffic data on each carrier in accordance with the provision of a resource for that carrier.

Node B 120 may implement a combined scheduler or distributed scheduler for the uplink. The unified scheduler can receive resource requests for all K carriers from all UEs, perform scheduling for all K carriers based on all received resource requests, and provide resources for each carrier so that good overall performance can be achieved. The resources provided may be set by the provided T2P, data rates, etc. A distributed scheduler may receive resource requests for each carrier from all UEs, perform scheduling independently for each carrier, and provide resources for each carrier based on resource requests received for that carrier.

UE 110 may send a separate resource request for each carrier if Node B 120 implements a distributed scheduler. This would allow the distributed scheduler to schedule the UE 110 to transmit data on the uplink on each carrier. UE 110 may also send a separate resource request for each carrier, even if Node B 120 implements an integrated scheduler. In this case, the combined scheduler may combine resource requests for different carriers and / or may satisfy or reject each resource request. The combined scheduler may also provide data rates that may differ from the data rates requested by UE 110. For example, the provided data rates may be higher than the requested data rates for some carriers and may be lower than the requested data rates for the remaining carriers. However, the total data rate provided may be less than or equal to the total requested data rate. UE 110 may generate resource requests for K carriers, as described below.

UE 110 may have a maximum transmit power P _max and may use a portion of the transmit power to send pilot and / or overhead information on each carrier. UE 110 may then have available transmit power P _avail for transmitting data on K carriers. Available transmit power P _avail can be expressed as:

, Ур. (1)

, Ur (one)

where P _{pilot, k} is the transmit power for the pilot on carrier k , and

P _{oh, k} is the transmit power for overhead information on the carrier k .

In a first embodiment, the UE 110 can evenly distribute or share the maximum transmit power P _max across all K carriers on which the UE 110 could be scheduled for data transmission. In this design, the transmit power allocated by each carrier may be expressed as:

для k=1,…, K, Ур. (2)

for k = 1, ..., K, Lv. (2)

where P _k is the allocated transmit power for data for carrier k .

2A shows an example of a transmission power distribution in accordance with a first embodiment. In this example, three carriers 1, 2, and 3 are available, and transmit data P ₁ , P _2, and P ₃ are allocated to them for data transmission, respectively. Although not shown in FIG. 2A, the allocated transmit power for each subcarrier may be limited by P _{max, k} , which is the transmit power necessary to achieve the maximum data rate supported by the system on carrier k . P _{max, k} may be the same for all carriers or may differ for different carriers.

.The available transmit power P _avail can also be distributed evenly between K carriers. In this case

.

In a second embodiment, UE 110 may allocate available transmit power P _avail to K carriers based on greedy fill. In this design, K carriers can be ordered based on their conditions in the channel from best to worst. Channel conditions can be measured as described below. After ordering, carrier 1 is the best carrier, carrier K is the worst carrier, and carrier k is the kth best carrier. K carriers can also be ordered based on static assignment.

. UE 110 может обновить доступную мощность передачи после выделения мощности передачи выбранной несущей следующим образом:UE 110 may allocate the available transmit power K to ordered carriers, one carrier at a time, starting with the best carrier. For a given carrier k selected for transmit power distribution, the UE 110 may allocate P _{max, k for the} selected carrier until the available transmit power is fully utilized, so that

. UE 110 may update the available transmit power after allocating the transmit power of the selected carrier as follows:

. Ур. (3)

. Ur (3)

UE 110 may allocate available transmit power to one carrier at a time until all available transmit power has been used up or all carriers have allocated transmit power.

2B shows an example of a distribution of transmit power in accordance with a second embodiment. In this example, three carriers 1, 2, and 3 are available and ordered from best to worst. Carrier 1 is allocated power P _{max, 1} , carrier 2 is allocated P _{max, 2} , and carrier 3 is allocated the remaining available transmit power.

In a third embodiment, the UE 110 may unevenly distribute the available transmit power P _avail among K carriers so that a good overall performance can be achieved. In one design, an uneven power distribution may be based on “dilution”. Dilution is similar to pouring a fixed amount of water into a vessel with an uneven bottom. The amount of water may correspond to the available transmit power, and each carrier may correspond to a point on the bottom of the vessel. The height of the bottom at any given point can correspond to the reciprocal of the ratio of the signal level to the total noise and noise level (SINR) of the carrier associated with this point. A low height can thus correspond to a high SINR, and vice versa. The available transmit power P _avail can then be “flooded” into the vessel so that the lower points in the vessel (which correspond to higher SINRs) are filled first, and the higher points in the vessel (which correspond to lower SINRs) are filled later. The power distribution may depend on the available transmit power P _avail and the depth of the vessel above the bottom surface.

These K carriers may observe different channel conditions and interference and may have different SINRs. The SINR of each carrier may be expressed as:

, для

Ур. (4)

for

Ur (four)

where P _k is the transmit power for carrier k ,

g _k - channel gain for carrier k ,

N _{0, k} is the thermal noise and interference on the carrier k , and

- принятое SINR для несущей k.

- received SINR for carrier k .

UE 110 may allocate the available transmit power to the K carriers so that the total data rate for the K carriers is maximized. In this case, the UE 110 may allocate the transmit power of each carrier from the condition that it maximizes the following objective function:

, Ур. (5)

, Ur (5)

where J is the objective function to maximize, and

- функция, предоставляющая скорость передачи данных, достигнутую с принятым SINR, равным

.

- a function providing a data rate achieved with a received SINR equal to

.

может предполагаться монотонно возрастающей по отношению к

так что

Функция

также может предполагаться вогнутой относительно

, так что

.Function

may be assumed to be monotonically increasing with respect to

so that

Function

may also be assumed concave with respect to

, so that

.

UE 110 may distribute available transmit power over K carriers with the following restrictions:

, Ур. (6)

, Ur (6)

, Ур. (7) и

, Ur (7) and

, Ур. (8)

, Ur (8)

Ур. (9)Where

Ur (9)

- необходимое SINR для максимальной скорости передачи данных, поддерживаемой системой, и

- the necessary SINR for the maximum data rate supported by the system, and

, на поднесущей k. P _{max, k} is the transmit power necessary to achieve a SINR equal to

, on subcarrier k .

P _{max, k} may also be called the maximum allowable transmit power for carrier k .

, но не увеличила бы скорость передачи данных. Уравнение (8) указывает, что общая мощность передачи, выделенная всем K несущим, не должна превышать доступную мощность передачи.Equation (6) indicates that non-negative transmit power can be allocated to each carrier. Equation (7) indicates that each carrier should be allocated no more than the transmit power P _{max, k} necessary to achieve the maximum data rate supported by the system. The release of more than P _{max, k} can lead to wasted excess power, since a higher transmit power would lead to a received SINR that is higher

but would not increase the data transfer rate. Equation (8) indicates that the total transmit power allocated to all K carriers should not exceed the available transmit power.

The Lagrange equation L for the objective function J can be expressed as:

, Ур. (10)

, Ur (10)

- скрытая цена P _k и является положительной лишь тогда, когда

,Where

- the hidden price P _k and is positive only when

,

- скрытая цена

и является положительной лишь тогда, когда

, и

- hidden price

and is positive only when

, and

λ is the hidden price P _avail .

и

являются неотрицательными значениями и указывают изменение в целевой функции J с небольшими отклонениями от ограничений P _avail,

и

соответственно.Hidden prices λ ,

and

are non-negative values and indicate a change in the objective function J with slight deviations from the constraints P _avail ,

and

respectively.

The objective function J can be maximized by taking the partial derivative L relative to P _k and setting the partial derivative to zero as follows:

, скрытые цены становятся

и

, и частная производная в уравнении (11) может выражаться в виде:When

, hidden prices become

and

, and the partial derivative in equation (11) can be expressed as:

Where

или значение 0 в противном случае. Значения всех K несущих могут суммироваться для получения числителя в уравнении (13). Значение каждой несущей может масштабироваться с помощью

, масштабированные значения для всех K несущих могут суммироваться, и суммарный результат может складываться с P _avail, чтобы получить знаменатель в уравнении (13).For equation (13), each carrier k may be assigned a value of 1 if its transmit power is

or value 0 otherwise. The values of all K carriers can be added to obtain the numerator in equation (13). The value of each carrier can be scaled with

, the scaled values for all K carriers can be added up, and the total result can be added to P _avail to get the denominator in equation (13).

может устанавливать соответствие принятого SINR со скоростью передачи данных и может быть ограниченной функцией пропускной способности, неограниченной функцией пропускной способности или какой-нибудь другой функцией. В одном исполнении функция

может быть неограниченной функцией пропускной способности и может выражаться в виде:Function

may match the received SINR with the data rate and may be a limited bandwidth function, an unlimited bandwidth function, or some other function. In one design, the function

can be an unlimited bandwidth function and can be expressed as:

, Ур. (14)

, Ur (fourteen)

where W is the system bandwidth.

As a result of combining equations (12), (13) and (14), the transmit power P _k for the selection of the carrier k can be expressed as:

. Ур. (15)

. Ur (fifteen)

, при

и

, уравнение (15) может быть упрощено в виде:For

at

and

, equation (15) can be simplified in the form:

. Ур. (16)

. Ur (16)

, и может определяться на основе уравнений (12) и (13).In general, P _k may depend on the particular function used to

, and can be determined based on equations (12) and (13).

и отношение между

и P _k подразумевают, что несущая, которой выделяется

, должна быть лучше несущей, которой выделяется

, которая должна быть лучше несущей, которой выделяется

. Это наблюдение может использоваться для многократного распределения доступной мощности передачи K несущим.This is not an analytical solution for distributing the available transmit power K to the carrier using “dilution”. However, monotonic and concave characteristics of the function

and the relationship between

and P _k mean that the carrier to which is allocated

should be better than the carrier that stands out

, which should be better than the carrier, which stands out

. This observation can be used to repeatedly distribute the available transmit power K to the carriers.

, чтобы наилучшая несущая обладала наибольшим

, а наихудшая несущая обладала наименьшим

. После упорядочения несущая 1 является наилучшей несущей, несущая K является наихудшей несущей, а несущая k является k-й наилучшей несущей.FIG. 3 shows a design of a process 300 for performing “dilution”. First, K carriers can be ordered based on their conditions in the channel from best to worst (step 310). Channel conditions can be measured using

so that the best carrier has the greatest

and the worst carrier had the smallest

. After ordering, carrier 1 is the best carrier, carrier K is the worst carrier, and carrier k is the kth best carrier.

The maximum allowable transmit power P _{max, k} can then be allocated to as many carriers as possible, one carrier at a time, starting with the best carrier in order to maximize the objective function J (step 320). Step 320 may allocate P _{max, k to} zero or more carriers. The remaining available transmit power may be allocated by the remaining carrier to maximize the objective function (block 330). Step 320 may be referred to as dilution step 1, and step 330 may be referred to as dilution step 2. Steps 320 and 330 may be performed multiple times, as described below.

. Группа 2 может включать в себя несущие, которым выделена

. Группы 1 и 2 могут инициализироваться, чтобы не содержать несущих, и каждая несущая может инициализироваться с помощью

.For iterative dilution, two carrier groups can be supported. Group 1 may include carriers to which it is allocated

. Group 2 may include carriers to which it is allocated

. Groups 1 and 2 can be initialized so as not to contain carriers, and each carrier can be initialized with

.

FIG. 4 shows a design of an iterative process for step 320 of FIG. 3. The index k for the carrier may be set to an initial value of 1 (step 412). Carrier k may be allocated as much transmission power as possible, while the allocated transmit power P _{k is} limited to either P _avail or P _{max, k} (step 414). A determination can then be made whether some of the allocated transmit power P _k for carrier k can be redistributed better than the next worst carrier k +1 (step 420). This determination can be made based on the following check:

. Ур. (17)

. Ur (17)

при P _K, выделенной несущей k, с частной производной у

при отсутствии мощности передачи, выделенной следующей худшей несущей k+1. Если уравнение (17) выполняется и для этапа 420 ответом является "Да", то несущие k и k+1 могут быть помещены в группу 2 (этап 422), и процесс для этапа 320 может завершиться. В противном случае, если не выполняется уравнение (17) и для этапа 420 ответом является "Нет", то можно выполнить определение, равна ли выделенная мощность передачи P _k для несущей k P _avail либо P _max,k (этап 430). Если P _k равна P _avail, то несущая k может быть помещена в группу 2 (этап 432), и процесс для этапа 320 может завершиться.Equation (17) compares the partial derivative

when P _K , the selected carrier k , with a partial derivative

in the absence of transmit power allocated by the next worst carrier k +1. If equation (17) is satisfied and the answer is “Yes” for step 420, then the carriers k and k + 1 can be placed in group 2 (step 422), and the process for step 320 can be completed. Otherwise, if equation (17) is not satisfied and the answer is “No” for step 420, then it can be determined whether the allocated transmit power P _k is equal to the carrier k P _avail or P _{max, k} (step 430). If P _k is equal to P _avail , then the carrier k may be placed in group 2 (step 432), and the process for step 320 may end.

(этап 436). Если всем K несущим выделена мощность передачи, как определено на этапе 438, то процесс для этапа 320 может завершиться. В противном случае индекс k можно увеличить (этап 440), и процесс может вернуться к этапу 414.Otherwise, if P _k is equal to P _{max, k} , then the carrier k can be placed in group 1 (step 434). Available transmit power can then be updated as

(step 436). If all K carriers are allocated transmission power, as determined in step 438, then the process for step 320 may end. Otherwise, the index k can be increased (step 440), and the process can return to step 414.

The process for step 320 of FIG. 4 may provide a group 1 containing zero or more carriers for which P _{max, k has been} allocated, and a group 2 containing zero or more carriers for which less than P _{max, k has} been allocated. Step 330 may be performed if the process for step 320 is terminated after step 422 of FIG. 4, and may be skipped if the process for step 320 is terminated after step 432 or 438 of FIG. 4.

Figure 5 shows the execution of the iterative process for step 330 of Figure 3. Group 2 may be assumed to include carriers k , k + 1, ..., k + m , where k may be less than K and m may be 0 or more. Carriers k through k + m in group 2 can be allocated transmission power from P _k to P _{k + m} at an available transmit power P _avail (step 512). For step 512, λ can be calculated for m + 1 carriers in group 2, for example, as shown in equation (13). Then, transmit power can be calculated to allocate each carrier in group 2, for example, as shown in equation (16).

(этап 514). Если ответом является "Да", то каждой избыточно выделенной несущей может выделяться достаточная мощность передачи для достижения

, и она может перемещаться в группу 1 (этап 516). Группа 2 также может обновляться путем удаления каждой несущей, которая перемещена в группу 1 (этап 518). Доступная мощность передачи может обновляться путем вычитания мощности передачи, выделенной каждой несущей, перемещенной в группу 1 (этап 520). Затем процесс может вернуться к этапу 512, чтобы повторить распределение мощности передачи для оставшихся элементов в группе 2.Then, a determination can be made whether any carrier in group 2 is allocated more transmit power than necessary to achieve

(step 514). If the answer is “Yes,” then each excessively allocated carrier may be allocated sufficient transmit power to achieve

, and it can move to group 1 (step 516). Group 2 can also be updated by removing each carrier that has been moved to group 1 (block 518). Available transmit power can be updated by subtracting the transmit power allocated to each carrier moved to group 1 (block 520). The process may then return to step 512 to repeat the distribution of transmission power for the remaining elements in group 2.

, и ответом является "Нет" для этапа 514, то может быть выполнено определение, имеется ли следующая худшая несущая k+m+1, еще не включенная в группу 2 (этап 520). Если ответом является "Нет", то процесс для этапа 330 может завершиться. В противном случае, если ответом является "Да", то может быть выполнено определение, можно ли некоторую часть выделенной мощности передачи P _k+m для наихудшей несущей k+m в группе 2 лучше перераспределить следующей худшей несущей k+m+1 (этап 522). Это определение может выполняться на основе следующей проверки:Otherwise, if no carrier is allocated more than the transmit power to achieve

and the answer is “No” for step 514, then a determination can be made whether there is the next worst carrier k + m +1 not yet included in group 2 (step 520). If the answer is “No,” then the process for step 330 may end. Otherwise, if the answer is “Yes”, then a determination can be made whether it is possible to redistribute some of the allocated transmit power P _{k + m} for the worst carrier k + m in group 2 to the next worst carrier k + m +1 (step 522 ) This determination can be made based on the following check:

. Ур. (18)

. Ur (eighteen)

при P _k+m, выделенной наихудшей несущей k+m в группе 2, с частной производной у

при отсутствии мощности передачи, выделенной следующей худшей несущей k+m+1. Если выполняется уравнение (18) и для этапа 522 ответом является "Да", то несущая k+m+1 может быть добавлена в группу 2 (этап 524), и процесс может вернуться к этапу 512, чтобы повторить распределение мощности передачи с несущими k - k+m+1 в группе 2. В противном случае, если не выполняется уравнение (18) и для этапа 522 ответом является "Нет", то процесс для этапа 330 может завершиться.Equation (18) compares the partial derivative of

when P _{k + m} , allocated by the worst carrier k + m in group 2, with a partial derivative

in the absence of transmit power allocated by the next worst carrier k + m +1. If equation (18) is fulfilled and the answer is “Yes” for step 522, then the carrier k + m +1 can be added to group 2 (step 524), and the process can return to step 512 to repeat the transmission power distribution with the carriers k - k + m +1 in group 2. Otherwise, if equation (18) is not satisfied and the answer is “No” for step 522, then the process for step 330 may end.

.One or more iterations may be performed for step 320 and / or step 330 to distribute the available transmit power K to the carriers. The result of dilution is one or many carriers with allocated transmit power so that the objective function J is maximized. There may be some unused transmit power if the UE 110 has enough power to allocate the maximum allowable transmit power for each carrier to achieve

.

Figures 3, 4 and 5 show one embodiment of dilution in order to distribute the available transmit power K to the carriers. Dilution can also be performed in other ways. For example, you can skip step 320 in FIG. 3, and step 330 can be performed with group 2, initially including carriers 1 and 2.

, несущей 2 выделяется

и несущей 3 выделяется

, где P₂ и P₃ могут определяться уравнениями (13) и (16).Fig. 2C shows an example of a transmission power distribution according to a third embodiment for dilution. In this example, three carriers 1, 2, and 3 are available and ordered from best to worst. Carrier 1 stands out

Carrier 2 stands out

and carrier 3 stands out

where P ₂ and P ₃ can be determined by equations (13) and (16).

As shown in equations (15) and (16), the UE 110 can determine the transmit power P _k for allocating each carrier k based on the channel gain g _k and the noise and interference N _{0, k} for that carrier. However, the UE 110 may not know the channel gain g _k and the noise and interference N _{0, k} . In one design, UE 110 may determine the allocated transmit power P _k for each carrier k based on the transmit power P _{pilot, k} for pilot on carrier k . The transmit power for the pilot signal can be adjusted using the power control loop to achieve the target SINR at Node B 120. The transmit power P _k for traffic data can then be set higher than the transmit power for the pilot signal at the selected T2P, and can be expressed as:

, Ур. (19)

, Ur (19)

where T2P _k is T2P for carrier k .

The _pilot signal may be considered equivalent to the data rate of the R _pilot . The data rate R _data can be achieved for traffic data with T2P selected. The equivalent data rate for the control signal can then be expressed as:

. Ур. (20)

. Ur (twenty)

Equation (20) may be more accurate for a low data rate for traffic _data R _data and may be less accurate for a high data rate for traffic data.

. Для неограниченной функции пропускной способности, показанной в уравнении (14), эквивалентная скорость передачи данных для контрольного сигнала может выражаться в виде:The power control loop can set the target SINR for the pilot to a narrow range regardless of the data rate for the traffic data. In this case, the scaling in equation (20) may be insensitive to the data rate of the traffic data. Equivalent _{pilot pilot} bit rate R _pilot may be in the linear region of the function

. For the unlimited bandwidth function shown in equation (14), the equivalent data rate for the pilot signal can be expressed as:

. Ур. (21)

. Ur (21)

The ratio of the channel gain g _k to noise and interference N _{0, k} for each carrier k can then be approximately calculated as:

. Ур. (22)

. Ur (22)

тогда может определяться для каждой несущей k на основе вычисленного R _pilot, известной полосы пропускания системы W и известной мощности передачи P _pilot,k, используемой для контрольного сигнала на несущей k.The equivalent _{pilot pilot} bit rate R _pilot may be calculated based on the known traffic data rate R _data and the known T2P for transmitting data on one or multiple carriers. Attitude

then it can be determined for each carrier k based on the calculated R _pilot , the known system bandwidth W and the known transmit power P _{pilot, k} used for the pilot on carrier k .

The transmit power P _k for allocating the carrier k can then be expressed as:

. Ур. (23)

. Ur (23)

, поэтому

и

.Equation (23) assumes that

, so

and

.

The hidden price λ can be set as follows:

Equations (23) and (24) indicate that carriers with better channel conditions (and therefore lower transmit power for pilot) typically have a larger allocated transmit power P _k . This may occur even if the adopted SINR is higher for the best carrier on Node B 120.

. Линейная область может охватывать диапазон значений P _k или

(или эквивалентно, диапазон скоростей передачи данных), в котором

может приближенно выражаться линейной функцией. Для любой заданной итерации на Фиг.4, если выделенная мощность передачи для несущей k находится в линейной области, то итерация может прекратиться сразу без выполнения проверки в уравнении (17).For iterative dilution, various simplifications can be used. In one design, you can specify a linear region with a T2P boundary for the function

. The linear region may span a range of values of P _k or

(or equivalently, a range of data rates) in which

can be approximated by a linear function. For any given iteration in FIG. 4, if the allocated transmit power for the carrier k is in the linear region, then the iteration can stop immediately without performing the check in equation (17).

As an example, dilution for the case with two carriers 1 and 2 and all data rates in the linear region can be performed as follows. Carrier 1 can be allocated as much transmission power as possible. If the allocated transmit power P ₁ for carrier 1 is limited to P _avail , then dilution is stopped. If P _{1 is} limited to P _{max, 1} , then carrier 2 can be allocated as much transmission power as possible. The allocated transmit power P ₂ for carrier 2 may be limited by P _avail or P _{max, 2} .

As another example, dilution for the case with two carriers 1 and 2 and a maximum data rate in the nonlinear region can be performed as follows. Carrier 1 may be allocated as much transmit power as possible, and P ₁ may be limited to P _{max, 1,} or P _avail . Then the following check can be performed:

. Если это так, то несущей 1 может выделяться достаточная мощность передачи для достижения

, и несущей 2 может выделяться как можно больше оставшейся мощности передачи. P ₂ для несущей 2 может ограничиваться P _avail или P _max,2.If equation (25) is satisfied and P _{1 is} limited to P _avail , then dilution ceases. If equation (25) is not satisfied, then the carriers 1 and 2 can be placed in group 2, and they can be allocated transmission power P ₁ and P _2, respectively. A determination can then be made whether any carrier is allocated more transmit power than is necessary to achieve

. If so, then carrier 1 can be allocated sufficient transmit power to achieve

, and carrier 2 may be allocated as much as possible of the remaining transmit power. P ₂ for carrier 2 may be limited to P _avail or P _{max, 2} .

для разных значений P _k может приблизительно вычисляться с помощью кусочной линейной аппроксимации и сохраняться в справочной таблице. Тогда частная производная для каждой скорости передачи данных может без труда определяться путем обращения к справочной таблице.To simplify the calculation for dilution, the partial derivative

for different values of P _k can be approximately calculated using a piecewise linear approximation and stored in a look-up table. Then the partial derivative for each data rate can be easily determined by referring to the lookup table.

UE 110 may determine the allocated transmit power P _k for each of the K carriers based on uniform distribution, greedy filling, or dilution, as described above. In one design, the UE 110 may determine the requested T2P for each carrier k based on the allocated transmit power P _k and the transmit power of the pilot signal P _{pilot, k} for carrier k , for example, as shown in equation (19). UE 110 may generate a resource request for each carrier with a non-zero allocated transmit power and may include the requested T2P for the carrier. Node B 120 may schedule UE 110 to transmit data on the uplink based on the reported T2P for each carrier. The Node B 120 may also determine the provided T2P for each carrier, which may be equal to, less than, or possibly greater than the requested T2P for the carrier. Node B 120 may send a resource grant for each carrier with positive T2P grant. UE 110 may then transmit traffic data on each carrier using the provided T2P for the carrier. UE 110 may store a table that establishes a correspondence between T2P and the transport format, and may determine a specific transport format or data rate for use for each carrier based on the provided T2P for that carrier.

In general, UE 110 may send any information for each carrier that may be related to Node B 120 to schedule UE 110 to transmit data and allocate resources for UE 110. Information sent by UE 110 may comprise T2P allocated transmit power P _k , SINR score, data rate, amount of traffic data to send, etc. Information for each carrier may be sent on a separate resource request. Alternatively, a resource request may carry information for multiple carriers. The Node B 120 may provide resources for the UE 110 based on information received from the UE 110. The provided resources may be determined by the amount of transmit power that the UE 110 may use on each carrier, the data rate for each carrier, etc.

If the Node B 120 uses the unified scheduler, the unified scheduler can determine the channel conditions for each carrier for UE 110 and can determine the appropriate resource allocations for all K carriers based on the conditions in the channel and possibly other factors. For example, the resource provisioning for UE 110 may depend on the data requirements of UE 110, the instantaneous congestion states at Node B 120, the level of interference (e.g., target excess over thermal noise (ROT)) allowed by Node B 120, etc. If Node B 120 uses a distributed scheduler, then the distributed scheduler can schedule UE 110 for each carrier based on the conditions in the channel and the resource request for that carrier.

6 shows a design of a process 600 for generating and sending resource requests for multiple carriers. Process 600 may be performed by a UE (as described below) or by some other entity. The UE may determine the available transmit power P _avail for data transmission on multiple carriers (block 612). The UE may allocate available transmit power to multiple carriers to obtain the allocated transmit power P _k for each of the multiple carriers (block 614). The UE may send at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers (block 616). The UE may send one resource request for each carrier, or may send a resource request for more than one carrier. After that, the UE may receive at least one resource grant containing information indicating the transmitted transmit power for each of the at least one carrier among the plurality of carriers (block 618). The UE may be provided with transmit power for all or a subset of the multiple carriers. The UE may send data on at least one carrier (block 620) and may limit the transmit power for each carrier to the transmit power provided for that carrier (block 622).

In one design of step 614, the UE may distribute the maximum transmit power equally to the multiple carriers and may determine the allocated transmit power for each carrier based on the transmit power allocated to that carrier and the transmit power used for pilot and overhead on the carrier, for example, as shown in equation (2). The UE may also distribute available transmit power to multiple carriers equally. In another design of step 614, the UE may allocate available transmit power based on greedy fill. In this design, the UE can arrange multiple carriers from best to worst based on their channel conditions. The UE may select one carrier at a time to allocate transmit power, starting with the best carrier. The UE may allocate the maximum allowable transmit power for that carrier to the selected carrier until the available transmit power is fully utilized.

In yet another design of step 614, the UE may allocate available transmit power based on dilution. The UE can distribute the available transmit power unequally to a plurality of carriers, and more transmit power is allocated to carriers observing better conditions in the channel. To simplify the distribution of power, the UE can arrange the multiple carriers from best to worst based on their channel conditions and can distribute the available transmit power to the multiple carriers based on their order and channel conditions on the multiple carriers. The UE may first allocate the maximum allowable transmit power to as many carriers as possible, one carrier at a time, starting with the best carrier, based on the objective function, for example, as shown in FIG. 4. Then, the UE may allocate the remaining available transmit power to the remaining plurality of carriers, if any, based on the objective function, for example, as shown in FIG. 5. The UE may also skip the first dilution portion in FIG. 4 and may perform only the second dilution portion in FIG. 5. The objective function can maximize the sum of data rates for multiple carriers, for example, as shown in equation (5).

In one design of the first dilution portion shown in FIG. 4, the UE may select a carrier (eg, the best carrier not yet selected) to allocate transmit power. Then, the UE may allocate to the selected carrier the smaller of all available transmit power P _avail or the maximum allowable transmit power P _{max, k} for the selected carrier. The UE may update the available transmit power to take into account the transmit power allocated by the selected carrier. The UE may also determine whether to allocate the allocated transmit power for the selected carrier to the next worst carrier, for example, as shown in equation (17). The UE may also perform other steps shown in FIG. 4.

In one design of the second dilution portion shown in FIG. 5, the UE may distribute the available transmit power of at least one carrier among the plurality of dilution-based carriers, for example, as shown in equations (13) and (16). The UE may determine whether to redistribute the next worst carrier the allocated transmit power for the worst carrier among at least one subcarrier. If a redistribution determination is made, then the UE may allocate the available transmit power of at least one carrier and the next worst carrier. The UE may also perform other steps in FIG. 5.

для каждой из множества несущих. UE может оценивать эквивалентную скорость передачи данных для контрольного сигнала, отправленного на каждой несущей, на основе скорости передачи данных для данных трафика, отправленных на этой несущей, и мощности передачи (или T2P) для данных трафика, например, как показано в уравнении (20). Затем UE может оценить

для каждой несущей на основе мощности передачи для контрольного сигнала, отправленного на несущей, и эквивалентной скорости передачи данных для контрольного сигнала, например, как показано в уравнении (22). UE может распределить доступную мощность передачи множеству несущих на основе предполагаемого

для каждой несущей, например, как показано в уравнениях (23) и (24).In one design, the UE may evaluate the ratio of channel gain to total noise and interference

for each of the many carriers. The UE may estimate the equivalent data rate for the pilot sent on each carrier based on the data rate for the traffic data sent on that carrier and the transmit power (or T2P) for the traffic data, for example, as shown in equation (20) . Then the UE can evaluate

for each carrier based on the transmit power for the pilot sent on the carrier and the equivalent data rate for the pilot, for example, as shown in equation (22). The UE may allocate available transmit power to multiple carriers based on the intended

for each carrier, for example, as shown in equations (23) and (24).

7 shows a design of a process 700 for receiving resource requests for multiple carriers. Process 700 may be performed by Node B (as described below) or some other entity. The Node B may receive at least one resource request from the UE containing information indicating the allocated transmit power for each of the plurality of carriers (block 712). The allocated transmit power for each carrier can be determined by distributing the available transmit power on the UE to a plurality of carriers using uniform power distribution, greedy filling, dilution, etc. The Node B may provide transmit power for each of the at least one carrier among the plurality of carriers based on the allocated transmit power for each of the plurality of carriers (block 714). The Node B may send the UE at least one resource grant containing information indicating the transmit power provided for each of the at least one carrier (block 716). The Node B may receive data sent by the UE on at least one carrier (block 718). The UE may limit the transmit power for each carrier to the provided transmit power for that carrier.

In one design of step 714, Node B may implement an integrated scheduler that can provide transmission power for at least one carrier together based on allocated transmission powers for multiple carriers. In another design of step 714, Node B may implement a distributed scheduler that can provide transmit power for each carrier individually based on the allocated transmit power for that carrier.

The techniques described in this document can be used for the various radio systems and technologies mentioned above. Techniques can be used for high-speed packet access (HSPA) with multiple carriers in 3GPP. HSPA includes High Speed Downlink Packet Access (HSDPA) defined in 3GPP Version 5 and above, as well as High Speed Downlink Packet Access (HSUPA) defined in 3GPP Version 6 and higher. HSDPA and HSUPA are sets of channels and procedures that enable high-speed packet data transmission on the downlink and uplink, respectively. For HSPA, the UE 110 may allocate available transmit power to multiple carriers and send resource requests for multiple carriers on a dedicated physical control channel (E-DPCCH) in an enhanced dedicated channel (E-DCH). UE 110 may receive absolute representations for multiple carriers on an absolute grant channel in the E-DCH (E-AGCH) and / or relative grants on the channel relative grant in the E-DCH (E-RGCH). UE 110 may send traffic data on a dedicated physical data channel (E-DPDCH) to the E-DCH in accordance with the grants.

FIG. 8 shows a block diagram of a design of UE 110 and Node B 120. At UE 110, a transmit processor 814 may receive traffic data from a data source 812 and control information (eg, resource requests) from a controller / processor 820. A transmit processor 814 may process ( for example, to encode and display in characters) traffic data and control information, performs modulation (for example, for CDMA, etc.) and provides output samples. Transmitter 816 (TMTR) can lead to predetermined conditions (e.g., convert to analog form, filter, amplify, and upconvert) the output samples and generate an uplink signal that can be transmitted through antenna 818.

At Node B 120, an antenna 852 may receive uplink signals from UE 110 and other UEs and provide the received signal to receiver 854 (RCVR). Receiver 854 may lead to predetermined conditions and digitize the received signal and provide input samples. A receive processor 856 may perform demodulation on the input samples (e.g., for CDMA, etc.) and may demodulate and decode the resulting symbols to obtain decoded traffic data and control information sent by the UE 110 and other UEs. A receive processor 856 may provide decoded traffic data to a data receiver 858, and decoded control information to a controller / processor 860.

On the downlink, the transmit processor 874 at Node B 120 may receive traffic data for the UE from the data source 872 and control information (eg, resource provisioning) from the controller / processor 860. The traffic data and control information may be processed (eg, encoded, displayed in symbols and modulated) by the transmit processor 874 and additionally reduced to predetermined conditions by the transmitter 876 to generate a downlink signal that can be transmitted via antenna 852. At UE 110, the signal is downstream of the communication line from Node B 120 may be received by the antenna 818, reduced to given conditions by the receiver 832, and demodulated and decoded by the receiving processor 834.

Controllers / processors 820 and 860 can direct the operation on UE 110 and Node B 120, respectively. A processor 820 and / or other processors and modules on the UE 110 may execute or control the process 300 in FIG. 3, the process 600 in FIG. 6, and / or other processes for the methods described herein. A processor 860 and / or other processors and modules at a Node B 120 may execute or direct the process 700 in FIG. 7 and / or other processes for the techniques described herein. Storage devices 822 and 862 store program code and data for UE 110 and Node B 120, respectively. Scheduler 864 may schedule the UE to transmit data on the downlink and / or uplink and may assign resources to the scheduled UEs.

Those of skill in the art would understand that information and signals can be represented using any of a number of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols and elementary signals that can be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any their combination.

Those skilled in the art would further recognize that the various illustrative logical blocks, modules, circuits, and algorithm steps described in relation to the disclosure of the invention in this document may be implemented as electronic hardware, computer software, or combinations thereof. To clearly illustrate this interchangeability of hardware and software, various explanatory components, blocks, modules, circuits, and steps are described above, typically based on their functionality. Whether functionality such as hardware or software is implemented depends on the particular application and design constraints imposed on the entire system. Skilled artisans may implement the described functionality in varying ways for each individual application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

The various explanatory logic blocks, modules, and circuits described with respect to the disclosure of the invention in this document may be implemented or implemented using a universal processor, a digital signal processor (DSP), a specialized integrated circuit (ASIC), a user programmable gate array (FPGA), or other programmable logic device, circuitry for discrete components or transistor logic, discrete hardware components, or any combination thereof, designed to perform the described nnyh in this document functions. A universal processor may be a microprocessor, but in the alternative, the processor may be any typical processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The steps of a method or algorithm described in connection with the disclosure of the invention in this document can be implemented directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a compact disk, or any other form of storage medium known in the art. A typical storage medium is connected to the processor so that the processor can read information and write information to the storage medium. Alternatively, the storage medium may be integral with the processor. The processor and the storage medium may reside in the ASIC. ASIC may reside in a user terminal. Alternatively, the processor and the storage medium may reside as separate components in a user terminal.

In one or more exemplary embodiments, the described functions may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, functions may be stored or transmitted in the form of one or more instructions or code on a computer-readable medium. Computer-readable media include both computer storage media and communication media, including any medium that facilitates transferring a computer program from one place to another. Storage media may be any available media that can be accessed using a universal or specialized computer. By way of example, and not limitation, such computer-readable media may include RAM, ROM, EEPROM, a CD or other optical drive, a magnetic disk drive or other magnetic storage device, or any other medium that can be used to move or storing the necessary means of program code in the form of commands or data structures, and which [the carrier] can be accessed through a universal or specialized computer or a universal or specialized processor. Also, any connection is correctly called a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair cable, digital subscriber line (DSL), or wireless technologies such as infrared, radio frequency, and microwave communications, coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio frequency, and microwave communications are included in the media definition. An optical disk and a magnetic disk, as used herein, include a compact disk (CD), a laser disk, an optical disk, a digital versatile disk (DVD), a floppy disk, and a Blu-ray disk, where magnetic disks typically reproduce magnetic data way, while optical discs reproduce data optically with lasers. Combinations of the above should also be included in the area of computer-readable media.

The foregoing description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure of the invention. Various modifications to this disclosure of the invention will be fully apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, this disclosure of the invention is not intended to be limited to the examples and executions described in this document, but should correspond to the broadest scope consistent with the principles and features of novelty disclosed in this document.

Claims (39)

1. A method for wireless communication, comprising the steps of:
determining the available transmit power for transmitting data on multiple carriers;
allocating the available transmit power to the multiple carriers to obtain the allocated transmit power for each of the multiple carriers;
sending at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers; and
at least one resource grant is received containing information indicating the provided transmit power for each of the at least one carrier among the plurality of carriers. 2. The method according to claim 1, additionally containing stages in which:
send data on at least one carrier; and
limit the transmit power for each of the at least one carrier to the provided transmit power for the carrier. 3. The method according to claim 1, wherein the step of distributing the available transmit power comprises the steps of:
distributing the maximum transmit power equally to the plurality of carriers, and
determining the allocated transmit power for each carrier based on the transmit power, the distributed carrier, and the transmit power used for the pilot and overhead on the carrier. 4. The method according to claim 1, wherein the step of distributing the available transmit power includes the steps of:
arrange the many carriers from best to worst based on the conditions in the channel for many carriers,
one carrier at a time is selected to allocate transmit power, starting with the best carrier among the plurality of carriers, and
allocate to the selected carrier the maximum allowable transmit power for the carrier until the available transmit power is fully utilized or the transmit power is allocated to all subcarriers. 5. The method according to claim 1, wherein the step of distributing the available transmit power is distributed equally to the plurality of carriers, and more transmit power is allocated to the carriers observing better conditions in the channel. 6. The method according to claim 1, wherein the step of distributing the available transmit power comprises the steps of:
arranging the plurality of carriers from best to worst based on channel conditions for the plurality of carriers, and
allocate the available transmit power to the multiple carriers based on the order of the multiple carriers and channel conditions of the multiple carriers. 7. The method of claim 6, wherein the step of distributing the available transmit power to the plurality of carriers based on the order of the plurality of carriers comprises the steps of:
allocating the maximum allowable transmit power to as many as many carriers, one carrier at a time, starting with the best carrier, based on the objective function, and
allocate the remaining available transmit power to the remaining set of carriers, if any, based on the objective function. 8. The method according to claim 7, in which the objective function maximizes the sum of the data transfer rates for multiple carriers. 9. The method according to claim 1, in which the step of distributing the available transmit power, comprises the steps of
a carrier is selected from among the plurality of carriers to allocate transmit power,
allocate the selected carrier the smaller of all available transmit power or the maximum allowable transmit power for the selected carrier and
update the available transmit power to take into account the transmit power allocated by the selected carrier. 10. The method according to claim 9, in which the step of distributing the available transmit power, further comprises determining whether to redistribute the allocated transmit power for the selected carrier to the next worst carrier. 11. The method according to claim 1, wherein the step of distributing the available transmit power comprises the steps of:
distributing the available transmit power of at least one carrier among the plurality of dilution-based carriers,
determining whether to redistribute the next worst carrier the allocated transmit power for the worst carrier among at least one subcarrier, and
distribute the available transmit power of at least one carrier and the next worst carrier if, as a result of the determination, a decision is made to reallocate. 12. The method according to claim 1, wherein the step of distributing the available transmit power includes the steps of:
estimating the ratio of the channel gain to the total noise and interference for each of the plurality of carriers, and
allocate available transmit power to multiple carriers based on the ratio of the channel gain to the total noise and interference for each carrier. 13. The method of claim 12, wherein the step of distributing the available transmit power comprises the steps of:
estimating an equivalent data rate for the pilot sent on each carrier based on the data rate for the traffic data sent on the carrier and the transmission power for the traffic data, and
estimate the ratio of the channel gain to the total noise and interference for each carrier based on the transmit power for the pilot sent on the carrier and the equivalent data rate for the pilot. 14. A device for wireless communication, comprising:
at least one processor configured to determine an available transmit power for transmitting data on a plurality of carriers, allocating an available transmit power to a plurality of carriers to obtain an allocated transmit power for each of a plurality of carriers, sending at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers, and receiving at least one resource grant containing information indicating power provided transmissions for each of at least one carrier among the plurality of carriers, 15. The apparatus of claim 14, wherein the at least one processor is configured to send data on at least one carrier and limit transmit power for each of the at least one carrier with the provided transmit power for the carrier. 16. The apparatus of claim 14, wherein the at least one processor is configured to distribute maximum transmit power equally to a plurality of carriers and determine an allocated transmit power for each carrier based on transmit power, distributed carrier, and transmit power used for pilot and overhead on the carrier. 17. The device according to 14, in which at least one processor is configured to order the set of carriers from best to worst based on the conditions in the channel for multiple carriers and the distribution of available transmit power to multiple carriers is not equal based on the order of multiple carriers, and the carriers observing the best conditions in the channel, more transmission power is allocated. 18. The device of claim 14, wherein the at least one processor is configured to select a carrier among a plurality of carriers to allocate transmit power, allocate a selected carrier less than all available transmit power or maximum allowable transmit power for the selected carrier, and update available transmit power to take into account the transmit power allocated by the selected carrier. 19. The device according to 14, in which the at least one processor is configured to distribute the available transmit power of at least one carrier among the plurality of carriers based on dilution, determine whether to allocate the next worst carrier the allocated transmit power for the worst carrier among at least at least one subcarrier, and the distribution of the available transmit power of at least one carrier and the next worst carrier, if, as a result of the determination, a decision is made to reallocate. 20. A device for wireless communication, comprising:
means for determining available transmit power for transmitting data on multiple carriers;
means for distributing the available transmit power to the plurality of carriers to obtain an allocated transmit power for each of the plurality of carriers;
means for sending at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers; and
means for receiving at least one provision of a resource containing information indicating the provided transmit power for each of the at least one carrier among the plurality of carriers. 21. The device according to claim 20, further comprising:
means for sending data on at least one carrier; and
means for limiting the transmit power for each of the at least one carrier to the provided transmit power for the carrier. 22. The device according to claim 20, in which the means for distributing the available transmit power contains
means for distributing the maximum transmit power equally to the plurality of carriers, and
means for determining an allocated transmit power for each carrier based on transmit power, distributed carrier, and transmit power used for pilot and overhead on the carrier. 23. The apparatus of claim 20, wherein the means for distributing the available transmit power comprises means for arranging the plurality of carriers from best to worst based on channel conditions for the plurality of carriers, and
means for distributing the available transmit power to the plurality of carriers on an equal basis based on the order of the plurality of carriers, with the carriers observing better conditions in the channel being allocated more transmit power. 24. The device according to claim 20, in which the means for distributing the available transmit power contains
means for selecting a carrier among the plurality of carriers for allocating transmit power,
means for allocating the selected carrier the smallest of all available transmit power or the maximum allowable transmit power for the selected carrier, and
means for updating the available transmit power to take into account the transmit power allocated to the selected carrier. 25. The device according to claim 20, in which the means for distributing the available transmit power contains
means for distributing the available transmit power of at least one carrier among the plurality of dilution-based carriers,
means for determining whether to redistribute the next worst carrier the allocated transmit power for the worst carrier among at least one subcarrier, and
means for distributing the available transmit power of at least one carrier and the next worst carrier, if a redistribution determination is made. 26. A computer-readable medium comprising computer-readable instructions that, when executed, implement a wireless communication method, the computer-executable instructions comprising:
code to cause at least one computer to determine the available transmit power for transmitting data on multiple carriers,
code to cause at least one computer to allocate available transmit power to a plurality of carriers to obtain an allocated transmit power for each of the plurality of carriers,
code to cause the at least one computer to send at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers, and
code to cause at least one computer to receive at least one provision of a resource containing information indicating the transmit power provided for each of the at least one carrier among the plurality of carriers. 27. A method for wireless communication, comprising the steps of:
receiving from the user equipment (UE) at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers, the allocated transmit power for each carrier being determined by allocating the available transmit power in the UE to the plurality of carriers;
providing transmit power for the UE for each of the at least one carrier among the plurality of carriers based on the allocated transmit power for each of the plurality of carriers; and
sending at least one resource grant to the UE containing information indicating the transmit power provided for each of the at least one carrier. 28. The method of claim 27, wherein the step of providing transmission power to the UE for each of the at least one carrier, comprising the step of providing transmission power for the at least one carrier together based on the allocated transmission powers for the plurality bearing. 29. The method of claim 27, wherein the step of providing the UE with transmit power for each of the at least one carrier, comprising the step of providing transmit power for each carrier individually based on the allocated transmit power for the carrier. 30. A device for wireless communication, comprising:
at least one processor configured to receive from the user equipment (UE) at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers, the allocated transmit power for each carrier being determined by allocating the available transmit power to the UE multiple carriers, providing transmit power for the UE for each of the at least one carrier among the multiple carriers based on the allocated transmit power for each of m ozhestva carriers, and sending to the UE at least one resource grant comprising information indicative of granted transmit power for each of the at least one carrier. 31. The apparatus of claim 30, wherein the at least one processor is configured to provide transmit power for at least one carrier together based on allocated transmit powers for the plurality of carriers. 32. The device according to item 30, in which at least one processor is configured to provide transmit power for each carrier individually based on the allocated transmit power for the carrier. 33. A method for wireless communication, comprising the steps of:
determining the available transmit power for transmitting data on multiple carriers;
distribute the available transmit power to the multiple carriers to obtain the allocated transmit power for each of the multiple carriers, and in the distribution step:
estimate the ratio of the channel gain to the total noise and interference for each of the many carriers,
estimating the equivalent data rate for the pilot sent on each carrier based on the data rate for the traffic data sent on this carrier and the transmission power for the traffic data, and
estimating the ratio of the channel gain to the total noise and interference for each carrier based on the transmit power for the pilot sent on the carrier and the equivalent data rate for the pilot,
allocating available transmit power to multiple carriers based on the ratio of the channel gain to the total noise and interference for each carrier; and
send at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers. 34. A device for wireless communication, comprising:
means for receiving from the user equipment (UE) at least one resource request containing information indicating the allocated transmit power for each of the plurality of carriers, the allocated transmit power for each carrier being determined by distributing the available transmit power in the UE to the plurality of carriers;
means for providing the UE with transmit power for each of the at least one carrier among the plurality of carriers based on the allocated transmit power for each of the plurality of carriers; and
means for sending to the UE at least one provision of a resource containing information indicating the provided transmit power for each of the at least one carrier. 35. The wireless communications apparatus of claim 34, wherein the means for providing transmission power to the UE for each of the at least one carrier comprises means for providing transmission power for the at least one carrier together based on the allocated transmission powers for the plurality of carriers. 36. The wireless communications apparatus of claim 34, wherein the means for providing transmission power to the UE for each of the at least one carrier comprises means for providing transmission power for each carrier individually based on the allocated transmission power for the carrier. 37. A computer-readable medium comprising computer-readable instructions that, when executed, implement a wireless communication method, the computer-executable instructions comprising:
code to cause at least one computer to receive at least one resource request from a user equipment (UE) containing information indicating the allocated transmit power for each of the plurality of carriers, the allocated transmit power for each carrier being determined by distributing the available transmit power in UE to multiple carriers,
code to cause at least one computer to provide transmit power for the UE for each of the at least one carrier among the plurality of carriers based on the allocated transmit power for each of the plurality of carriers, and
code to cause the at least one computer to send at least one resource grant to the UE containing information indicating the transmit power provided for each of the at least one carrier. 38. The computer-readable medium of claim 37, wherein providing the UE with transmit power for each of the at least one carrier comprises providing transmit power for the at least one carrier together based on the allocated transmit powers for the multiple carriers. 39. The computer-readable medium of claim 37, wherein providing the UE with transmit power for each of the at least one carrier comprises providing transmit power for each carrier individually based on the allocated transmit power for the carrier.

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