WO2012122757A1 - Procédé et dispositif pour une transmission adaptative de canal de contrôle physique de liaison descendante - Google Patents

Procédé et dispositif pour une transmission adaptative de canal de contrôle physique de liaison descendante Download PDF

Info

Publication number
WO2012122757A1
WO2012122757A1 PCT/CN2011/076255 CN2011076255W WO2012122757A1 WO 2012122757 A1 WO2012122757 A1 WO 2012122757A1 CN 2011076255 W CN2011076255 W CN 2011076255W WO 2012122757 A1 WO2012122757 A1 WO 2012122757A1
Authority
WO
WIPO (PCT)
Prior art keywords
user
base station
value
power
current
Prior art date
Application number
PCT/CN2011/076255
Other languages
English (en)
Chinese (zh)
Inventor
谭源春
周晖
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2012122757A1 publication Critical patent/WO2012122757A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/12—Outer and inner loops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/44—TPC being performed in particular situations in connection with interruption of transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/20—TPC being performed according to specific parameters using error rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels

Definitions

  • the present invention relates to a PDCCH (High Speed Physical Downlink Control Channel) adaptive transmission technology, and in particular, to a PDCCH adaptive transmission method and apparatus.
  • PDCCH High Speed Physical Downlink Control Channel
  • the PDCCH is composed of a CCE (Control Channel Element) and is used to carry DCI (Downlink Control Information).
  • the location of the cell and the status of each cell are different. If some users are walking and some users are in-vehicle, the PDCCH needs to be adaptively transmitted to ensure the reliability of PDCCH transmission. .
  • the CCE aggregation degree used by the PDCCH is controlled by the downlink quality information, such as the CQI (Channel Quality Indicator) and the RSRP (Reference Signal Receiving Power), to ensure the reliability of the PDCCH. Sex, but the reliability that can be achieved by this method is not ideal, and the system performance of the PDCCH cannot be fully guaranteed. Summary of the invention
  • An object of the present invention is to provide a PDCCH adaptive transmission method and apparatus for solving the problem of poor PDCCH reliability.
  • a PDCCH adaptive transmission method including the following steps:
  • the base station passes DTX (Discontinuous Transmission) information to the user. Detection, adjusting the outer loop factor to obtain the current outer loop factor;
  • the base station allocates CCE resources and power of the control channel unit that meets the target BLER (Block Error Ratio) according to the current outer ring factor, the remaining available CCE resources, and the physical downlink control channel PDCCH of the user.
  • BLER Block Error Ratio
  • the base station adjusts the outer loop factor by detecting the discontinuous transmission DTX information of the user:
  • the outer loop factor is increased by one uplink step; when the base station does not detect the user's DTX information, the outer loop factor is reduced by one downward step.
  • the method further includes:
  • the base station determines the value of the up-stepping step and the value of the down-stepping step according to the target BLER.
  • the base station allocates CCE resources and powers that meet the target BLER to the PDCCH of the user, specifically:
  • the base station is worth the current required power value of one or more users according to the current outer loop factor, the remaining available CCE resources, and the user's previous use power;
  • the base station obtains one or more user available power values by comparing the current power value of one or more users with the remaining power value of the base station;
  • the base station allocates CCE resources and power corresponding to one of the user available power values of one or more user available power values to the PDCCH of the user.
  • the base station obtains, according to the current outer ring factor, the remaining available CCE resources, and the user's previous used power value, the current required power value of one or more users:
  • the base station obtains the value of one or more available CCE aggregation degrees according to the remaining available CCE resources; and obtains the current required power value of one or more users by using the following formula:
  • the current power value required by the user current outer loop factor - the value of the available CCE aggregation degree + the user's previous use power value.
  • a PDCCH adaptive transmission apparatus including: a DTX detecting unit, an outer ring adjusting unit, and a resource allocating unit; wherein
  • a discontinuous transmission DTX detecting unit configured to detect DTX information of a user
  • An outer loop adjustment unit configured to adjust an outer loop factor according to DTX information to obtain a current outer loop factor
  • a resource allocation unit configured to allocate a control channel element (CCE) resource and power that meets a target error rate BLER according to a current outer ring factor, a remaining available CCE resource, and a physical downlink control channel PDCCH of the user.
  • CCE control channel element
  • the outer loop adjustment unit includes: a top adjustment subunit and a down adjustment subunit; wherein, the up adjustment subunit is configured to: when the DTX information of the user is detected, add an up step size to the outer loop factor;
  • the sub-unit is adjusted to reduce the outer loop factor by one down step when no DTX information of the user is detected.
  • the ring adjustment unit further includes:
  • the step size calculation sub-unit is configured to determine the value of the step-up step and the value of the step-down step according to the target BLER.
  • the resource allocation unit comprises: a power calculation subunit and a CCE and a power allocation subunit; wherein
  • a power calculation subunit configured to obtain a current required power value of one or more users according to a current outer loop factor, a remaining available CCE resource, and a user used power value, and pass the current required power value of the one or more users to the base station Comparing the remaining power values to obtain one or more user available power values;
  • the CCE and power allocation sub-units are configured to allocate CCE resources and power corresponding to one of the user available power values to the PDCCH of the user.
  • the power calculation sub-unit obtains the current required power value of one or more users according to the current outer loop factor, the remaining available CCE resources, and the user's previous used power value, specifically: Obtaining the value of one or more available CCE aggregation degrees according to the remaining available CCE resources; obtaining the current required power value of one or more users by the following formula:
  • the current power value required by the user current outer loop factor - the value of the available CCE aggregation degree + the user's previous use power value.
  • the present invention controls the CCE resources and power used by the PDCCH by detecting the DTX information of the user by the base station, thereby improving the reliability of the PDCCH.
  • FIG. 1 is a schematic flowchart of a PDCCH adaptive transmission method provided by the present invention
  • FIG. 2 is a schematic structural diagram of a PDCCH adaptive transmission apparatus provided by the present invention
  • FIG. 3(a) is a base station for detecting a PDCCH downlink DTX provided by the present invention. Schematic diagram of information
  • FIG. 3(b) is a schematic diagram of a base station for detecting PDCCH uplink DTX information provided by the present invention
  • FIG. 1 is a schematic flowchart of a PDCCH adaptive transmission method provided by the present invention. As shown in FIG. 1, the process includes:
  • Step S101 The base station detects the DTX information of the user. When the DTX information of the user is detected, the outer loop factor of the user is increased by an upward adjustment step. When the DTX information of the user is not detected, the outer loop factor of the user is decreased. A down step to get the current outer loop factor. The value of the step up step and the value of the down step are determined by the base station according to the target BLER.
  • the base station obtains the current required power value of one or more users according to the current outer ring factor, the remaining available CCE resources, and the user's previous used power value, and then compares the current required power value of one or more users with the remaining power value of the base station. If the current power value of the user is greater than the remaining power value of the base station, the current power value required by the user is available. If the current power value of the user is less than or equal to the remaining power value of the base station, the current power value of the user is unavailable, thereby obtaining one or The power value available to multiple users.
  • the user uses the power value as the power used by the PDCCH at the most recent time, and the power usage initial value Powerinit for the first PDCCH transmission of the user.
  • the base station selects one user available power value from the obtained one or more user available power values, and allocates CCE resources and power corresponding to the user available power value to the PDCCH of the user.
  • the CCE resource represents the number of allocated CCEs, which is determined according to the CCE aggregation degree.
  • the apparatus includes a DTX detection unit, an outer loop adjustment unit, and a resource allocation unit.
  • the DTX detecting unit is configured to detect whether the current TTI (Transmission Time Interval) of the user is DTX.
  • the outer loop adjusting unit is configured to calculate, according to an output result of the DTX detecting unit, an outer loop factor of the user, including a step calculating subunit, a lifting subunit, and a down subunit.
  • the step calculation unit calculates the value of the adjustment step and the value of the step size of the adjustment of the outer loop factor according to the target BLER, and the up-modulation sub-unit performs an external loop when the output of the DTX detection unit is that the DTX information of the user is detected.
  • the factor is increased by one up step, and when the output of the DTX detection unit is that the DTX information of the user is not detected, the outer loop factor is reduced by one down step, thereby obtaining the current outer loop factor.
  • the pre-use power value is a PDCCH allocation of the control channel unit CCE and power that satisfies the target BLER, including a power calculation sub-unit, a CCE, and a power allocation sub-unit.
  • the CCE and the power allocation sub-unit select one of the one or more user available power values obtained from the power calculation sub-unit, and allocate the CCE resources and power corresponding to the available power value of the user to the PDCCH of the user.
  • the CCE resource represents the number of allocated CCEs, which is determined according to the CCE aggregation degree.
  • FIG. 3(a) is a diagram showing the base station of the present invention for detecting DTX information of a PDCCH downlink.
  • the base station transmits uplink DCI1 information through the PDCCH at time a, and detects at time b.
  • the ACK information fed back to the user transmits DCI1 information through the PDCCH at time c. Since the user does not receive the DCI1 information, the base station checks the DTX information at time d.
  • FIG. 3(b) is a diagram showing the DTX information of the PDCCH uplink detected by the base station provided by the present invention.
  • the base station side a time transmits downlink DCI0 information through the PDCCH, and detects at time b.
  • the PUSCH information transmitted by the user transmits DCI0 information through the PDCCH at time c. Since the user does not receive the DCI0 information, the base station checks the DTX information at time d.
  • FIG. 4 shows an implementation flow of a PDCCH adaptive transmission processing method provided by the present invention.
  • the method includes: Step S401: The base station detects DTX information of the user in the current TTI. If the user does not receive the DCI1 and does not perform ACK/NACK feedback or if the user does not receive the DCI0 and does not send the PUSCH, the base station will detect the DTX information of the user.
  • Step S402 determining, according to the result of step S401, whether the DTX information of the user is detected. If the base station detects the DTX information of the current user, the process proceeds to step S403. If the base station does not detect the DTX information of the user in the current TTI, Then, the process proceeds to step S404.
  • Step S403 the base station adds an uplink step to the outer loop factor DeltaPDCCH of the user.
  • DeltaPDCCH DeltaPDCCH + Step Up ( ⁇ )
  • Step S404 the base station decreases a lowering step size of the outer ring factor DeltaPDCCH of the user.
  • Step S405 The base station allocates CCE resources and powers that meet the target BLER to the PDCCH of the user according to the current outer ring factor Delta PDCCH, the remaining available CCE resources CCEremaind, and the power value Powerinit used by the user.
  • the base station determines, according to the current remaining CCE resources, a CCE aggregation degree set that can be allocated for the user, and is assumed to be ⁇ CCEallocl, CCEalloc2, ..., CCEallocN, where N is a natural number, and the CCE can be allocated from the user.
  • Pneed DeltaPDCCH - PDCCHres + Powerinit (4)
  • the Premaind and then take a CCE aggregation degree from the CCE aggregation degree set that can be allocated for the user to participate in the calculation until the CCE aggregation degree in the CCE aggregation degree set is traversed. If the Pneed is less than or equal to the Premaind, the CCE is allocated to the user. The degree of polymerization CCEalloci, the power is Pneed.
  • the base station maintains the remaining PDCCH power Premaind , and the formula is as follows:
  • Pr emaind Pr emaind ⁇ Pneed (5)
  • the CCE aggregation degree is selected in the CCE aggregation degree set that can be allocated for the user, and may be selected in order from small to large.
  • the CCE aggregation degree used by the set PDCCH of the user may be set to the maximum CCE aggregation degree 8 or other values may be set, and any aggregation degree in the CCE aggregation degree set may be used as the initial value of the CCE aggregation degree.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the target PDCCH of the user's PDCCH be 1%
  • StepU be 0.99dB
  • StepDown be O.OldB
  • the initial CCE aggregation degree CCEinit is 8
  • the power value used by the user before is 33.6dBm
  • the current outer ring factor of the user The DelataPDCCH is -2 dB
  • the remaining PDCCH power Premaind is 60 dBm.
  • the base station detects the DTX information of the user at the current time. Therefore, the base station adds an up step StepUp to the outer ring factor of the user, and the current outer ring factor is -1.01. dB.
  • the base station determines, according to the CCE resource CCEremaind of the current TTI, the CCE aggregation degree set that can be allocated for the user, and sends a CCE aggregation degree from the CCE aggregation degree set that can be allocated by the user, and takes CCEallocl to 4, and uses Equation (3) calculates that the CCEallocl dB value PDCCHres is -3dB.
  • the current power value Pneed of the user is calculated to be 35.59 dBm. It can be seen that the current power value required by the user is smaller than the remaining PDCCH power value. Therefore, the base station allocates the CCE aggregation degree 4 to the user, and the power is 35.59dBm for transmission.
  • the base station maintains Premaind and CCEremaind, and maintains Premaind with Equation (5), which is 24.41dBm.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the target BLER of the user's PDCCH be 1%
  • StepU be 0.99dB
  • StepDown be O.OldB
  • the initial CCE aggregation degree CCEinit is 8
  • the power value used by the user before is 33.6dBm
  • the current outer ring factor of the user The DelataPDCCH is -3.02 dB and the remaining PDCCH power Premaind is 30 dBm.
  • the base station does not detect the DTX information of the user at the current time, so the base station reduces the outer loop factor of the user by one down step StepDown, and the current outer loop factor is -3.03 dB.
  • the base station determines, according to the current CTI resource CCEremaind of the current TTI, the CCE aggregation degree set that can be allocated for the user, and makes ⁇ 2 , 4 ⁇ , and takes a smaller CCE aggregation degree from the CCE aggregation degree set that can be allocated by the user, and takes out CCEallocl, which is 2, ⁇
  • the PDCCHres of CCEallocl is -6dB.
  • the current power value Pneed of the user is calculated to be 36.57 dBm.
  • the current power value required by the user is greater than the remaining PDCCH power value, and therefore, from the CCE aggregation degree set that can be allocated by the user.
  • CCEalloc2 which is 4, and calculate the dB value of CCEalloc2 with PDCCHres of -3dB using equation (3).
  • the current power value Pneed of the user is calculated to be 33.57 dBm, and it can be seen that the current power value required by the user is greater than the remaining PDCCH power value, and each CCE in the CCE aggregation degree set that the user can allocate The degree of aggregation is traversed, so the base station does not allocate CCE and power to the user.
  • the present invention has the following technical effects:
  • the present invention controls the CCE and power used by the PDCCH of the user by detecting the DTX information of the user by the base station, thereby improving the reliability of the PDCCH to a large extent.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé permettant une transmission adaptative de canal de contrôle physique de liaison descendante (PDCCH). Ledit procédé comprend les étapes suivantes : une station de base ajuste un facteur de boucle externe et obtient le facteur de boucle externe courant en détectant les informations de transmission discontinue (DTX) d'un utilisateur ; et selon le facteur de boucle externe courant, les ressources disponibles restantes d'élément CCE (élément de canal de contrôle) et la valeur de la puissance mise en œuvre précédemment de l'utilisateur, la station de base alloue, au canal PDCCH de l'utilisateur, des ressources d'élément CCE et une puissance satisfaisant le taux d'erreur de bloc (BLER) ciblé. En conséquence, la présente invention concerne en outre un dispositif pour une transmission adaptative de canal PDCCH. Par la détection des informations DTX de l'utilisateur effectuée par la station de base, l'invention commande les ressources d'élément CCE et la puissance utilisées par le canal PDCCH, améliorant de cette façon la fiabilité du canal PDCCH.
PCT/CN2011/076255 2011-03-11 2011-06-24 Procédé et dispositif pour une transmission adaptative de canal de contrôle physique de liaison descendante WO2012122757A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110059107.X 2011-03-11
CN201110059107.XA CN102685894B (zh) 2011-03-11 2011-03-11 一种pdcch自适应传输方法和装置

Publications (1)

Publication Number Publication Date
WO2012122757A1 true WO2012122757A1 (fr) 2012-09-20

Family

ID=46817085

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/076255 WO2012122757A1 (fr) 2011-03-11 2011-06-24 Procédé et dispositif pour une transmission adaptative de canal de contrôle physique de liaison descendante

Country Status (2)

Country Link
CN (1) CN102685894B (fr)
WO (1) WO2012122757A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108574553B (zh) * 2017-03-08 2021-02-09 中兴通讯股份有限公司 一种控制信道自适应的方法及装置
CN107172703B (zh) * 2017-06-05 2020-03-10 武汉虹信通信技术有限责任公司 一种pdcch功率分配溢出控制方法及系统
CN108156663A (zh) * 2017-12-25 2018-06-12 西安科技大学 Lte中一种改进控制信道资源分配的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1852041A (zh) * 2005-09-28 2006-10-25 华为技术有限公司 一种自适应调整高速共享控制信道功率的方法
US20080220806A1 (en) * 2007-03-07 2008-09-11 Interdigital Technology Corporation Combined open loop/closed loop method for controlling uplink power of a mobile station
WO2008157692A2 (fr) * 2007-06-20 2008-12-24 Motorola, Inc. Unité de base et dispositif pour des canaux de commande candidats et leur procédé
CN101939938A (zh) * 2008-02-08 2011-01-05 高通股份有限公司 上行链路控制信道上的不连续发射信令

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101663908A (zh) * 2007-02-28 2010-03-03 株式会社Ntt都科摩 基站装置以及通信控制方法
US20110205942A1 (en) * 2008-02-04 2011-08-25 Nokia Corporation COMBINING CCE's FOR POWER BALANCING
KR101523985B1 (ko) * 2008-12-12 2015-05-29 삼성전자주식회사 무선 통신 시스템에서 단말의 채널 품질 지시자를 이용한 제어 채널 요소 검출 방법 및 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1852041A (zh) * 2005-09-28 2006-10-25 华为技术有限公司 一种自适应调整高速共享控制信道功率的方法
US20080220806A1 (en) * 2007-03-07 2008-09-11 Interdigital Technology Corporation Combined open loop/closed loop method for controlling uplink power of a mobile station
WO2008157692A2 (fr) * 2007-06-20 2008-12-24 Motorola, Inc. Unité de base et dispositif pour des canaux de commande candidats et leur procédé
CN101939938A (zh) * 2008-02-08 2011-01-05 高通股份有限公司 上行链路控制信道上的不连续发射信令

Also Published As

Publication number Publication date
CN102685894A (zh) 2012-09-19
CN102685894B (zh) 2014-11-05

Similar Documents

Publication Publication Date Title
CN111955034B (zh) 多个上行链路载波的功率余量报告
CN110463290B (zh) 用于新无线电载波聚合的功率余量报告过程的方法和装置
CN113055992B (zh) 用于功率控制处理的方法和装置
WO2017012587A1 (fr) Procédé et dispositif de communication de dispositif à dispositif
US9668220B2 (en) Method and apparatus for controlling uplink power
JP6155317B2 (ja) 複数キャリアを使用する無線送受信機ユニットのアップリンク電力制御のための装置および方法
US11178698B2 (en) Power control of random access in NB-IoT
WO2013010441A1 (fr) Procédé et dispositif d'ajustement de puissance d'émission
TW201106752A (en) Method and apparatus for handoing uplink transmissions usnig multiple uplink carriers
TW201234789A (en) Methods, apparatus and systems for handling additional power backoff
WO2012113183A1 (fr) Procédé et appareil de configuration de ressources de liaison montante
CN101132631A (zh) 一种根据用户服务质量分配系统资源的方法及基站
WO2014117696A1 (fr) Procédé et dispositif de signalement d'une marge de puissance en cas d'agrégation de porteuses
CN113647155B (zh) 用于管理辅载波上的最大功率的方法和装置
WO2012019526A1 (fr) Procédé et dispositif pour rapporter et obtenir une marge de puissance
WO2019196895A1 (fr) Procédé de commande de puissance pour liaison latérale et dispositif terminal
WO2012136081A1 (fr) Procédé et dispositif de commande de puissance pour canal de commande de liaison montante physique
WO2011144011A1 (fr) Procédé et appareil de configuration de puissance d'émission
WO2013127278A1 (fr) Procédé et dispositif de détermination de puissance d'émission de liaison montante, et procédé et dispositif de détermination de paramètre de commande de puissance
CN102868502B (zh) 一种调整物理下行控制信道聚合度的方法及装置
WO2012155735A1 (fr) Procédé et dispositif permettant de déterminer une ressource de canal de commande de liaison descendante physique
WO2015085517A1 (fr) Procédé et dispositif de transmission pour des informations d'état d'utilisation de puissance
WO2010075764A1 (fr) Procédé et dispositif pour attribuer le nombre et la puissance de mot codé
WO2012122757A1 (fr) Procédé et dispositif pour une transmission adaptative de canal de contrôle physique de liaison descendante
WO2012122755A1 (fr) Procédé et appareil de transmission adaptative pour canal de contrôle physique de liaison descendante

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11860827

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11860827

Country of ref document: EP

Kind code of ref document: A1