CN101646187A - Common control channel uplink power control for adaptive modulation and coding techniques - Google Patents
Common control channel uplink power control for adaptive modulation and coding techniques Download PDFInfo
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- CN101646187A CN101646187A CN200910167208A CN200910167208A CN101646187A CN 101646187 A CN101646187 A CN 101646187A CN 200910167208 A CN200910167208 A CN 200910167208A CN 200910167208 A CN200910167208 A CN 200910167208A CN 101646187 A CN101646187 A CN 101646187A
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Abstract
COMMON CONTROL CHANNEL UPLINK POWER CONTROL FOR ADAPTIVE MODULATION AND CODING TECHNIQUES Using wireless digital code-division multiple access (CDMA) technology, a method and system in which adaptivemodulation and coding (AM & C) is utilized in order to achieve improved radio resource utilization and provide increased data rates for user services in which the base station (12) measures up link interference on all time slots received from user equipment UEs (30) and determines the need for uplink control channel. The base station transmits to the UE the allocation of specific uplink control channels indicating uplink interference in the time slot and potentially the quality margin. The UE (30) determines appropriate uplink power level based on a path loss determination (42) made by the UE,uplink interference and an optional quality margin. The UE (30) then initiates an uplink communication responsive to these determinations.
Description
The application be that May 14, application number in 2002 are 02809875.7 the applying date, exercise question divides an application for the Chinese patent application of " calculating the method and the subscriber equipment of the power grade of up-link transmission power ".
Technical field
The present invention relates to radio digital communication system.Especially, the invention relates to a kind of code division multiple access (CDMA) communication system of utilizing the up-link power control of adaptive modulation and coding.
Background technology
Inserting code division multiple access (CDMA) third generation (3G) mobile communication system is transmission to be used carry out adaptive modulation and coding (AM﹠amp; C), to reach and to improve the Radio Resource utilization and provide the data transfer rate of increase to serve to be used for the user.Adaptive modulation and coding (AM﹠amp; C) technology is to consider radio frequency (RF) propagation conditions before transmission, to determine to help most the modulation and the code rate of present radio frequency (RF) propagation conditions.
A kind of method of determining radio frequency (RF) propagation conditions is before each transmission, carries out the channel quality measurement at receiver.This measurement is transferred into transmitter, its subsequently just according to this physical channel quality measurement to determine to be suitable for the modulation and the code rate of specific transmission.
Radio frequency (RF) propagation conditions is promptly to change, particularly in moving application.Because the quality measurement of radio interface is in order to determining suitable modulation and coding and because channel quality measurements is possible change rapidly because radio frequency (RF) propagation conditions changes, the usefulness of adaptability transmission course be directly related to carry out quality measurement and open this time period between transmitting of beginning (just: the stand-by period 〉.Therefore, for obtaining optimum adaptation modulation and coding (AM﹠amp; C), have all users of movable transfer of data, just need to utilize minimum latency to carry out channel quality and measure.
Physics or logical control channel are to transfer to transmitter in order to channel quality is measured by receiver.Channel quality signaling (signaling) can be utilized the Dedicated Control Channel of each subscriber equipment (UE), also or the shared Common Control Channel of all subscriber equipmenies (UE).When adopting Dedicated Control Channel, when propagating the measurement of each subscriber equipment (UE) channel quality, can utilize the continuous signaling channel.From the viewpoint of usefulness, this is adaptive modulation and coding (AM﹠amp; C) optimal solution is because quality measurement is continuously available.If consider the continuous available quality measurement that suitably modulation and coding are set, then transmission may occur in any time.In addition, follow available always Dedicated Control Channel in up link, then this channel also can be used to support the low rate uplink data transmission.
The difficulty of Dedicated Control Channel approach is: physical resource is continuously configuration ground, even as the same when not having transfer of data.Adaptive modulation and coding (AM﹠amp; C) the main application of technology is the high data rate service of non real-time, and for example, world-wide web inserts.For this type of service, optimum quality of service (QoS) can rely on the weak point, the high rate data transmission that have long relatively idle period between each transmission to be reached.This isometric idle period can cause the poor efficiency of special-purpose data to be used.
This problem can be utilized in advance, and the periodicity dedicated channel of structure is configured to be minimized.Yet this measure but can cause the periodicity unavailability of quality measurement.If quality measurement is not continuously available, then for the subscriber equipment (UE) that transmission is all arranged at any time, just has only certain certain customers' equipment (UE) can have nearest channel quality and measure.
When adopting shared control channel, all subscriber equipmenies (UE) in the sub-district are shared the continuous signaling channel.In the third generation-time division duplex (3G TDD) system, the up link Common Control Channel occupies the single time slot in the multiple time slot typically.The program that each subscriber equipment (UE) inserts shared control channel is defined, and subscriber equipment (UE) sign can be used for distinguishing the transaction of special user equipment (UE).
For the competition of avoiding the up link Common Control Channel inserts, on the down link Common Control Channel, must send individual configuration with signal.Perhaps, some between downlink configuration and uplink configuration should belong to and can be defined.Each subscriber equipment (UE) is to insert the up link Common Control Channel according to its configuration immediately.Because ul transmissions can't be always by the network prediction and because ul transmissions is not frequent (only transmitting for 5% time in certain applications), therefore if will propagate uplink radio resources requires with the support uplink subscriber data, then also need the periodicity configuration of up Common Control Channel.Therefore, as adaptive modulation and coding (AM﹠amp; When C) shared control channel was adopted in operation, there was not loop internal power controlling mechanism in each subscriber equipment (UE), because Common Control Channel is discontinuous available.
In view of this, main purpose of the present invention provides a kind of efficient method, is used for when being enough to carry out the required burden of the method and minimizing, and carries out power control.
Summary of the invention
The present invention uses the both open loop technology to determine the power grade of up link Common Control Channel transmission, and it is with the information in the signal transmission down link, in order to reach optimal power level before the transmission of up link Common Control Channel.The specific uplink control channel of base station configuration indication uplink channel interference, and (alternatively〉the quality boundary of time slot.Subscriber equipment (UE) transmits on particular channel, and according to subscriber equipment (UE) path loss of being calculated and the data that the base station received, determines the suitable power grade of transmission.
According to an aspect of the present invention, provide a kind of method of implementing that is used for determining uplink power level in the base station, this method comprises: come receiving communication signal by the up link Common Control Channel; Measure interference on the described up link Common Control Channel in response to the signal of communication that receives; Monitor the channel quality on the described up link Common Control Channel, and be provided for the quality boundary of described signal of communication; And transmit described quality boundary by downlink control channel.
Description of drawings
Figure 1A is the simplification calcspar of a kind of base station of the present invention.
Figure 1B is the simplification calcspar of a kind of subscriber equipment of the present invention.
Fig. 1 C is the simplification calcspar of another embodiment of a kind of base station of the present invention.
Fig. 2 is the simplification calcspar that is used to illustrate according to a preferred embodiment of the process of Common Control Channel up-link power control of the present invention.
Fig. 3 is the flow chart of expression another embodiment of the present invention.
Embodiment
The present invention is with reference to appended graphic being described in detail as follows, and in the literary composition, identical numbering is in order to the expression same components.
Figure 1A is the simplification calcspar of Universal Mobile Telecommunications System terrestrial radio access network (UTRAN) base station 12 (hereinafter being called base station BS 12), and this base station BS 12 carries out radio communication (shown in Figure 1B) by radio frequency link 25 and subscriber equipment (UE) 30.This subscriber equipment (UE) 30 can be mobile phone, PDA(Personal Digital Assistant), maybe can comprise additional capabilities (such as call, Email or this type of function〉other similar device.
Base station BS 12 comprises: antenna 24 (or a plurality of antenna 〉, isolator/diverter switch 22 (or similar device), time slot interference measurement mechanism 26, up link Common Control Channel receiver 28, Common Control Channel character surveillance device 18, add overall apparatus 20, and with reference to downlink channel expansion and modulating device 14.The communication that base station BS 12 receives on the Radio Link 25 via antenna 24.Received signal is coupled to interferometry device 26 and up link Common Control Channel receiver 28 via isolator diverter switch 22.
The time slot interference that interferometry device 26 is measured on the up link Common Control Channel.For instance, interferometry device 26 can be measured Interference Signal Code Power (ISCP).Interferometry device 26 provides output (Icc), and this output is the indication of amount of interference on the up link Common Control Channel.
Quality boundary (QM) can be sent with signal, for instance, and for subscriber equipment (UE) transmits the sir target (SIR that calculates that expection reaches
Target).This quality boundary (QM) also can comprise based on the combination of the following factor: sir target (SIR
Target), service quality (QoS) demand of the desired service of radio frequency (RF) propagation conditions and/or subscriber equipment (UE).In regular turn, sir target (SIR
Target) can be based on the measurement of the previous transmission of special user equipment (UE), such as: piece error rate (BLER).Be different from uplink interference level, quality boundary (QM) need not be used for the public control setting of each indivedual up links and can (alternatively〉even specify deletion respectively by base station BS 12, shown in Fig. 1 C.
Please refer back to Figure 1A, when not specifying or when not by subscriber equipment (UE) when often upgrading, present embodiment is to store this quality boundary (QM), and utilizes nearest quality boundary (QM) by base station BS 12.
Output (Icc) and quality boundary (QM) numerical value put on first and second input that adds overall apparatus 20.The output that adds overall apparatus 20 inputs to expansion and modulating device 14.Though quality boundary (QM) and output (Icc) can utilize and add overall apparatus 20 and made up, as shown in FIG., it also can be encoded into single parameter, and then reduces down link and send burden.Another example for another example, output Icc can send respectively, for instance, on a broadcast channel.In this example, having only quality boundary (QM) is to need to send.Output Icc and quality boundary (QM) if do not make up or be encoded into single parameter, then can be imported expansion and modulating device 14 respectively and transmitting on the downlink channel respectively.The output of expansion and modulating device 14 is sent to antenna 24 via isolator/diverter switch 22, to transmit with subscriber equipment (UE) 30.Quality boundary (QM) and output (Icc) are single or more send on the multiple downlink control channel.Path loss measure (its be by subscriber equipment (UE) 30 carry out, and will be in hereinafter further describing) be on reference channel, to carry out.
As shown in FIG., Figure 1A to Fig. 1 C be the expression reference channel (and control channel (one or more).Will be appreciated that the present invention only is included in base station BS 12 and 30 of subscriber equipmenies (UE) are carried out a part that sends.Therefore, emphasis of the present invention and not lying in: whether described measurement transmits on single reference channel, single control channel or multiple reference and/or control channel.Can be contemplated that in essence of the present invention and scope the present invention also can adopt the combination of reference and/or control channel.
Please refer to Figure 1B, subscriber equipment (UE) 30 comprises: antenna 32, isolator/diverter switch 34, reference channel receiver 36, path loss calculation device 42, power grade calculation element 44, adaptive modulation and coding controller (not shown among Figure 1B), signaling receiver 48, power amplifier 50.Antenna 32 on radio frequency (RF) link, receive from the information of base station BS 12 transmit, and according to circumstances this information is transmitted via isolator/diverter switch 34 be applied to reference channel receiver 36 (just: reference channel) or signaling receiver 48 (just: control channel).
Quality boundary (QM) and output (Icc) information of receiving via base station BS 12 are received by signaling receiver 48, and this is sent to power grade calculation element 44 with information.Power grade calculation element 44 uses the output of path loss calculation devices 42 and signaling receiver 48, determines to transfer to the appropriate power grade of base station BS 12, and this appropriate power grade is the function of path loss and interference in radio frequency (RF) link 25.
The output 44a of power grade calculation element 44 comes the power output of rectification subscriber equipment (UE) via the control of power amplifier 50.Power amplifier 50 is according to circumstances to carry out amplification procedure.
The output of amplifier 50 via isolator/diverter switch 34 and antenna 32 to transfer to base station BS 12.
As understood by the skilled person, time division duplex (TDD) utilizes transmission structure with transmission frame repeatedly, and wherein, each frame comprises a plurality of time slots.The data of data waiting for transmission after by segmentation and segmentation are scheduled subsequently to transmit in one or more time slots.For time division duplex (TDD), formerly the channel quality of identical time slot (CQ) interferometry in the frame with regard to determining the modulation and the code rate itself of present frame, is very valuable.As will further describing in the literary composition, be before public control ul transmissions at channel quality (CQ) interferometry of base station measurement, in down link, sent with signal.
The embodiment of the inventive method 10 is shown in the flow chart of Fig. 2.In the method, base station BS 12, at step S1, reference channel utilizes oneself power grade known of subscriber equipment (UE) to transmit.Subscriber equipment (UE) 30 is in the continuous calculating path loss of step S2.At step S3, base station BS 12 (is the simplification purpose according to the transmission from subscriber equipment (UE), Fig. 2 only represents sole user's equipment (UE) 30), and, come the continuous measurement uplink channel interference from the transmission of (for simplifying purpose, Fig. 2 only represents single base station BS 12) of other base station.
At step S4, the needs that base station BS 12 is determined for the up link Common Control Channel, for instance: (1) adaptive modulation and coding (AM﹠amp; C) measurement report; Or (2) and close automatic repetitive requests (ARQ) control information.Describedly determine it is alternatively in response to the reception of data block.At step S5, base station BS 12 configuration specific uplink Common Control Channel are in order to indicate the uplink interference level Icc in the crack at this moment.At step S6, base station BS 12 sends the up link Common Control Channel to be utilized and the uplink interference level (Icc) of configurating channel.These parameters send on downlink control channel.Parameter that it should be noted that the specific uplink control channel can implicitly be learnt.
At step S7, subscriber equipment (UE) 30 reaches the level of interference Icc that is obtained by base station BS 12 according to the present path loss of being measured by subscriber equipment (UE) 30 at step S2, determines to transfer to the suitable uplink power level of base station BS 12.
As indicated above, in another alternative embodiment, quality boundary (QM) can send with level of interference Icc (or respectively).Another embodiment of the inventive method 20 is shown among Fig. 3, and it provides the further optimization of up link Common Control Channel power grade.The numbering of these steps is identical with the step of enforcement same program among Fig. 2 in Fig. 3.Yet further optimization has the requested quality boundary (QM) of up link Common Control Channel configuration via extra transmission and is reached.In other respects, quality boundary (QM) is based on previous transmission that step S3 receives by special user equipment (UE).Fig. 3 is shown step S6 adjustment form S6A and step S7 adjustment form is shown S7A.As shown in Figures 2 and 3, base station BS 12 can come execution in step S4 in response to the reception (or no matter whether receiving data block) of data block.
Please refer back to Fig. 2, the transmit power level T of subscriber equipment (UE)
UECan represent by following equation:
T
UE=PL+Icc equation (1)
Wherein, PL is a path loss; And Icc is the level of interference of up link Common Control Channel communication.This path loss (PL) can be calculated by following equation:
PL=T
REF-R
UEEquation (2)
Wherein, T
REFBe reference signal grade at base station BS 12, and R
UEIt is the Reference Signal Received Power that receives at subscriber equipment (UE).
At step S8, subscriber equipment (UE) opens the public control transmission of beginning up link with the uplink transmission power grade of utilizing equation (1) and equation (2) to calculate; This is transmitted in step S9 and is received by base station BS 12.
When quality boundary (QM) was transferred to subscriber equipment (UE) 30 by base station BS 12, shown in the other method 20 of Fig. 3, the transmit power level of subscriber equipment (UE) can be represented by following equation:
T
UE=PL+QM+Icc equation (3)
Wherein, PL is a path loss; QM is the quality boundary of expectation; And Icc is the level of interference of up link Common Control Channel communication.Path loss (PL) can be calculated by following equation:
PL=T
REF-R
UEEquation (4)
Wherein, T
REFBe reference signal grade at base station BS 12, and R
UEIt is Reference Signal Received Power at subscriber equipment (UE).
The present invention has a plurality of advantages than prior art.The uplink interference level of measuring can be designated in configuration messages, and then guarantee that subscriber equipment (UE) can utilize the very uplink interference measurements of low latency.As an alternative, the uplink interference grade of measurement can be via down link Common Control Channel or other device and is provided.Because adaptive modulation and coding (AM﹠amp; C) uplink control channel is present in the time slot of the single third generation (3G) time division duplex (TDD) pattern by expection, so the present invention just can obtain further efficient.According to normal, the loop power control mechanism that utilizes similar opening the time slot sytem in, the interference of each time slot must be reported to carry out proper handling.Because the up link Common Control Channel is only used single time slot and therefore only needed to send the uplink channel interference of single time slot, the burden during then downlink configuration sends just can minimize, and then helps more effective utilization of uplink radio resources.
Though the present invention utilizes preferred embodiment to be illustrated, various possible adjustment and change are in essence of the present invention listed in as claim and the scope, and be existing to those skilled in the art and easily see.
Claims (5)
1, a kind of method of in the base station, implementing that is used for determining uplink power level, this method comprises:
Come receiving communication signal by the up link Common Control Channel;
Measure interference on the described up link Common Control Channel in response to the signal of communication that receives;
Monitor the channel quality on the described up link Common Control Channel, and be provided for the quality boundary of described signal of communication; And
Transmit described quality boundary by downlink control channel.
2, method according to claim 1, this method also comprise interference and the described quality boundary that combination is measured.
3, method according to claim 2, this method also comprise measured interference and quality boundary are encoded into single parameter.
4, method according to claim 1, this method also comprise by broadcast channel and transmit measured interference.
5, method according to claim 1, wherein said quality boundary comprises sir target.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29073001P | 2001-05-14 | 2001-05-14 | |
| US60/290,730 | 2001-05-14 | ||
| US10/100,383 US6587697B2 (en) | 2001-05-14 | 2002-03-18 | Common control channel uplink power control for adaptive modulation and coding techniques |
| US10/100,383 | 2002-03-18 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028098757A Division CN100551166C (en) | 2001-05-14 | 2002-05-14 | Calculate the method and the subscriber equipment of the power grade of up-link transmission power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101646187A true CN101646187A (en) | 2010-02-10 |
| CN101646187B CN101646187B (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101672077A Expired - Fee Related CN101635946B (en) | 2001-05-14 | 2002-05-14 | User equipment |
| CN2009101672062A Expired - Lifetime CN101635945B (en) | 2001-05-14 | 2002-05-14 | Base station |
| CN2009101672081A Expired - Fee Related CN101646187B (en) | 2001-05-14 | 2002-05-14 | Method for determining uplink power level executed in base station |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101672077A Expired - Fee Related CN101635946B (en) | 2001-05-14 | 2002-05-14 | User equipment |
| CN2009101672062A Expired - Lifetime CN101635945B (en) | 2001-05-14 | 2002-05-14 | Base station |
Country Status (2)
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| CN (3) | CN101635946B (en) |
| SG (1) | SG149691A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103535086A (en) * | 2013-05-16 | 2014-01-22 | 华为技术有限公司 | Uplink power control method and base station |
| CN111510935A (en) * | 2019-01-31 | 2020-08-07 | 华为技术有限公司 | Uplink signal sending method, receiving method, device and system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5878329A (en) * | 1990-03-19 | 1999-03-02 | Celsat America, Inc. | Power control of an integrated cellular communications system |
| US5491837A (en) * | 1994-03-07 | 1996-02-13 | Ericsson Inc. | Method and system for channel allocation using power control and mobile-assisted handover measurements |
| FI102023B1 (en) * | 1996-11-26 | 1998-09-30 | Nokia Telecommunications Oy | Procedure for determining a load target and a radio system |
| US6101179A (en) * | 1997-09-19 | 2000-08-08 | Qualcomm Incorporated | Accurate open loop power control in a code division multiple access communication system |
| US6625776B1 (en) * | 1998-09-30 | 2003-09-23 | Northrop Grumman Corporation | Adaptive coding scheme for a processing communications satellite |
| CA2294698A1 (en) * | 1999-01-29 | 2000-07-29 | Lucent Technologies Inc. | Open loop power control for wireless mobile stations |
| CN1141855C (en) * | 1999-06-26 | 2004-03-10 | 深圳市中兴通讯股份有限公司 | Method for locating mobile terminal |
| EP1067710A1 (en) * | 1999-07-08 | 2001-01-10 | Alcatel | Mobile telecommunication system comprising an adaptive base station antenna |
-
2002
- 2002-05-14 CN CN2009101672077A patent/CN101635946B/en not_active Expired - Fee Related
- 2002-05-14 SG SG200508457-9A patent/SG149691A1/en unknown
- 2002-05-14 CN CN2009101672062A patent/CN101635945B/en not_active Expired - Lifetime
- 2002-05-14 CN CN2009101672081A patent/CN101646187B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103535086A (en) * | 2013-05-16 | 2014-01-22 | 华为技术有限公司 | Uplink power control method and base station |
| CN103535086B (en) * | 2013-05-16 | 2017-05-31 | 华为技术有限公司 | Ascending power control method and base station |
| CN111510935A (en) * | 2019-01-31 | 2020-08-07 | 华为技术有限公司 | Uplink signal sending method, receiving method, device and system |
| CN111510935B (en) * | 2019-01-31 | 2022-03-08 | 华为技术有限公司 | Uplink signal sending method, receiving method, device and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101635945A (en) | 2010-01-27 |
| CN101635945B (en) | 2011-05-18 |
| CN101646187B (en) | 2012-10-31 |
| CN101635946A (en) | 2010-01-27 |
| SG149691A1 (en) | 2009-02-27 |
| CN101635946B (en) | 2011-05-25 |
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