WO2014048265A1 - 一种控制信道处理方法和装置 - Google Patents
一种控制信道处理方法和装置 Download PDFInfo
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- WO2014048265A1 WO2014048265A1 PCT/CN2013/083693 CN2013083693W WO2014048265A1 WO 2014048265 A1 WO2014048265 A1 WO 2014048265A1 CN 2013083693 W CN2013083693 W CN 2013083693W WO 2014048265 A1 WO2014048265 A1 WO 2014048265A1
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- control channel
- activation
- smoothed
- received power
- beam area
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- 238000003672 processing method Methods 0.000 title claims abstract description 7
- 238000013468 resource allocation Methods 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000004913 activation Effects 0.000 claims description 69
- 238000000034 method Methods 0.000 claims description 25
- 238000004088 simulation Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 13
- 238000009499 grossing Methods 0.000 description 11
- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
-
- 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
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
- H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/30—Special cell shapes, e.g. doughnuts or ring cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to the field of communications, and in particular, to a control channel processing method and apparatus. Background technique
- LTE Long Term Evolution
- space-division multiplexing can be performed by utilizing a plurality of spatial channel weak correlation characteristics, thereby increasing the capacity of the system, but this method is subject to the correlation between the base station antenna and the wireless channel.
- space division multiplexing of LTE is limited to traffic channels, and the present invention proposes a scheme for control channel space division multiplexing.
- a control channel such as a Physical Downlink Control Channel (PDCCH)
- PDCCH Physical Downlink Control Channel
- the downlink control channel resources are very limited, and the resource location allocation of the control channel is determined by the cell radio network Temporary Identity of the user equipment (UE) according to the 3GPP TS 36.213 protocol.
- the C-RNTI and the control channel element (CCE) are determined by the degree of aggregation. It is often the case that the user to be scheduled cannot be scheduled due to the failure of the control channel allocation.
- the uplink and downlink traffic channels adopt multi-user multiple input multiple output (Multiple The problem is especially noticeable when using Input Multiple OutPut (MIMO) technology.
- MIMO Input Multiple OutPut
- the main purpose of the embodiments of the present invention is to provide a control channel processing method. And devices to reduce interference on the control channel and improve the performance of the control channel.
- a control channel processing method includes:
- the transmission of the control signal is performed according to the activated beam region of the control channel and the control channel resource allocation.
- the process of determining an active beam region of the control channel includes:
- the received power at each BA reference transmit power is smoothed in the time domain, and the obtained smoothed values of the received power of each beam region are in descending order. Arrange, the smoothing value at the head of the team is the smallest; the sum of the smooth received power of each beam region is subtracted from the smoothed value at the head of the team, and the sum of the obtained difference is compared with the smoothed value of the received power of each beam region.
- Dividing obtaining an activation ratio; determining whether the obtained activation ratio is greater than or equal to a preset second activation threshold; when the activation ratio is greater than or equal to the second activation threshold, deleting the smoothed value of the head of the queue; In the operation of the ratio, until the obtained activation ratio is less than the second activation threshold, it is determined that the smoothed value of the current head and the beam region corresponding to the remaining smoothing values in the queue are the active beam regions.
- the first activation threshold and the second activation threshold are determined by the link simulation result, and the selection range is (0, 1) on the premise of ensuring demodulation performance.
- the first activation threshold is less than 0.5; the second activation threshold is greater than 0.5.
- the process of performing control channel resource allocation includes:
- the resource pool of the cell control channel is first initialized, the resource pool of the cell control channel is determined according to the beam and bandwidth of the cell, and then the resource allocation is performed according to the active beam, and the control signal is transmitted on the active beam.
- a control channel processing apparatus configured to determine an active beam region of a control channel by using a received power of the BA; perform control channel resource allocation according to a scheduling situation in the cell; and, according to the activated beam region of the control channel, and the Control channel resource allocation is performed to transmit control signals.
- the device When determining the active beam region of the control channel, the device is configured to: obtain received power in each BA and perform conversion according to the reference transmit power, and perform smoothing on the received power in each BA reference transmit power in time domain; Determining a proportional relationship between the smoothed received power of each BA and the maximum smoothed received power, and determining that the BA is activated when the ratio of the smoothed power value of the BA to the maximum smoothed power of all the BAs is greater than or equal to the first active threshold;
- the received power at each BA reference transmit power is smoothed in the time domain, and the obtained smoothed values of the received power of each beam region are in descending order. Arrange, the smoothing value at the head of the team is the smallest; the sum of the smooth received power of each beam region is subtracted from the smoothed value at the head of the team, and the sum of the obtained difference is compared with the smoothed value of the received power of each beam region.
- Dividing obtaining an activation ratio; determining whether the obtained activation ratio is greater than or equal to a preset second activation threshold; when the activation ratio is greater than or equal to the second activation threshold, deleting the smoothed value of the head of the queue; In the operation of the ratio, until the obtained activation ratio is less than the second activation threshold, it is determined that the smoothed value of the current head and the beam region corresponding to the remaining smoothing values in the queue are the active beam regions.
- the first activation threshold and the second activation threshold are determined by the link simulation result, and the selection range is (0, 1) on the premise of ensuring demodulation performance.
- the first activation threshold is less than 0.5; the second activation threshold is greater than 0.5.
- the device is configured to: when performing control channel resource allocation:
- the resource pool of the cell control channel is first initialized, the resource pool of the cell control channel is determined according to the beam and bandwidth of the cell, and then the resource allocation is performed according to the active beam, and the control signal is transmitted on the active beam.
- the device is a base station.
- the technology for processing the control channel in the embodiment of the present invention uses AAS to implement resource allocation of the control channel in the LTE system, and can simultaneously improve the probability of spatial division multiplexing of the traffic channel and effectively reduce the interference of the control channel under the premise of ensuring normal operation of the system. , improve the performance of the control channel.
- FIG. 1 is a schematic diagram of an active antenna system (AAS);
- FIG. 2 is a flowchart of a control channel processing of an LTE system using AAS according to an embodiment of the present invention;
- FIG. 3 is a flow chart of a control channel processing according to an embodiment of the present invention; Figure. detailed description
- AAS is a brand new product, not only the integration of radio remote unit (RRU) and antenna, but more importantly, the original antenna feed network becomes active, enabling flexible control of the beam.
- AAS can form multiple beams by uplink and downlink independent downtilt, dynamic beamforming, and carrier/system independent downtilt. This multi-beam technology splits the traditional single cell into multiple beam areas and spaces between multiple beam areas. The correlation is greatly reduced, as shown in Figure 1.
- the AAS can be used in the LTE system to transmit control signals according to the active beam of the control channel to reduce the interference of the inter-cell control channel, thereby further improving system performance.
- the ASS multi-beam area coverage technology has less interference between the intra-cell area and the neighboring cell.
- the inter-cell control channel interference can be reduced, thereby further improving the system capacity.
- the control channel in the LTE system is processed based on the AAS, the following steps may be performed: Step 1: Determine the active beam region of the control channel by using the received power of each beam region; Step 2: Perform control channel resources according to the scheduling situation in the cell. Allocation, that is, control channel resource allocation after scheduling is completed. For example, if the traditional cell includes M Control Channel Element (CCE), and the AAS technology divides a single cell into N beam areas, the control channel resources under the AAS include M*N CCEs;
- CCE Control Channel Element
- Step 3 The control signal is transmitted according to the active beam region of the control channel and the control channel resource allocation in step 2.
- the control channel is not transmitted in all beam areas, but only in the active beam area, so interference to neighboring cells can be effectively reduced, so that the signal-to-interference ratio (SINR) of the adjacent cell control channel is improved and guaranteed.
- SINR signal-to-interference ratio
- the CCE aggregation degree is reduced on the premise of successful channel transmission.
- control channel transmission mode needs to be set, and the activation beam of the control channel is minimized under the premise of ensuring that the control channel performance is not affected, thereby reducing the interference to the neighboring cells.
- active beam determination of the control channel and control channel resource allocation can be performed.
- Step 1.2 Convert the received power at each BA according to the reference transmit power, For smoothing at different times, it is assumed here that the received power is ⁇ . ', the transmission power at the measurement time is PSD ⁇ , and the reference transmission power is PlS , then the received power at the reference transmission power ⁇ ⁇ is:
- Step 1.3 The received power at each BA reference transmit power is smoothed in the time domain, assuming a historical smoothing value under the reference transmit power P ta '.
- Ld ⁇ targetl,old 'Ptarget2,old ⁇ >"' ⁇ > ⁇ targetN ,old ⁇ , smoothing factor is ", range is (0, 1), smoothing formula is:
- Step 1.4 Determine a proportional relationship between the smoothed received power of each BA and the maximum smoothed received power.
- the determination of the activation threshold Thr4BAl depends on the result of the link simulation, and the larger value in the range (0, 1) is selected on the premise of ensuring the demodulation performance, and the recommended threshold is set to be less than 0.5.
- the meaning of the method 1 is: The smooth received power of each active beam region must be greater than or equal to the maximum smooth received power of Thr4BAl, so that the received power of the user in the active beam region can be ensured to be large, and the beam of the user with less received power can be avoided.
- the area is determined to be the active beam Area.
- Method 2 can also be divided into four steps, wherein steps 2.1 to 2.3 are the same as steps 1.1 to 1.3 in method 1, respectively.
- Step 2.4 linearly superimpose the smooth received power of each BA to obtain 1 ⁇ ⁇ , then arrange the smooth received power of each BA in ascending order, and select according to the following method:
- Step 2.4.1 First, all beams are defaulted To activate the beam, ie all beams are included in the activation step 2.4.2: the individual beams are cycled in ascending order according to the smoothed received power, assuming that the beam i is selected, calculated according to equation (4). :
- Step 2.4.3 If at this time - ⁇ . If the threshold is greater than or equal to Thr4BA2, beam i is removed from the active set, and then return to step 2.4.2 to select the next beam; otherwise, if this is ?-Pr. If the threshold is less than Thr4BA2, the beam termination is activated.
- the beam region in the active set is the active beam region.
- the active set is a set of active beam regions.
- Thr4BA2 The range of Thr4BA2 is (0, 1). It is recommended that the default configuration of Thr4BA2 be greater than 0.5. The specific value depends on the result of link simulation. Different modulation methods may use different thresholds. The method 2 can ensure that the receiving power of the user in the active beam area is large, and the beam area with a smaller receiving power is avoided as the active beam area.
- the method 2 can be: the smoothed values of the received powers of the respective beam regions obtained are arranged in order from small to large, and the smoothed value at the head of the team is the smallest;
- the smoothed value of the smooth received power of each beam region is subtracted from the smoothed value of the head of the team, and the obtained difference is divided by the sum of the smoothed values of the received powers of the respective beam regions to obtain an activation ratio. Finally, the judgment is obtained. Whether the activation ratio is greater than or equal to the preset activation threshold, when activated When the ratio is greater than or equal to the activation threshold, the smoothed value of the head of the team is deleted, and then the foregoing step of obtaining the activation ratio is repeated until the obtained activation ratio is less than the activation threshold, and the smoothed value of the current head is determined, and the remaining in the queue
- the beam area corresponding to the smoothed value is the active beam area.
- the thresholds Thr4BAl and Thr4BA2 can be determined according to the transmission characteristics of the control channel.
- the control channel can adopt the QPSK modulation mode.
- resource allocation of the control channel When resource allocation of the control channel is performed, resource allocation can be performed according to the active beam region of the control channel. For example, at the current scheduling moment, the resource pool of the cell control channel is first initialized, the resource pool of the cell control channel is determined according to the beam and bandwidth of the cell, and then the resource allocation is performed according to information such as the activation beam. Also, mark the allocated resources as occupied. For the specific resource allocation method, see the following example.
- the resource pool of the cell is N*M, and the form is as follows :
- the user-controlled resource allocation may be performed according to the active beam region of the user control channel. If the activation beam of the control channel is beam 1 and beam 2, the resource bitmap of beam 1 and beam 2 needs to be acquired according to beam 1 And the occupancy identifier of the resource bitmap of beam 2 determines the common residual resource, and then identifies on the resource bitmap of beam 1 and beam 2 for transmission of the control signal, that is, the control channel transmits on the active beam.
- the operation of processing the control channel in the embodiment of the present invention may represent the process shown in FIG. 3, and the process includes the following steps:
- Step 310 Determine an active beam region of the control channel by using the received power of the beam region; and perform control channel resource allocation according to the scheduling situation in the cell.
- Step 320 Perform transmission of a control signal according to an activated beam region of the control channel and the control channel resource allocation.
- the apparatus capable of performing the above-described control channel processing may be a device capable of managing communication resources such as a base station or a radio network controller (RNC).
- RNC radio network controller
- the method for processing the control channel in the embodiment of the present invention uses AAS to implement resource allocation of the control channel in the LTE system, and can simultaneously improve the traffic channel air separation under the premise of ensuring normal operation of the system.
- the probability of multiplexing can effectively reduce the interference of the control channel and improve the performance of the control channel.
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EP13840531.1A EP2876963B1 (en) | 2012-09-25 | 2013-09-17 | Control channel processing method and device |
JP2015530290A JP5990331B2 (ja) | 2012-09-25 | 2013-09-17 | 制御チャネル処理方法および装置 |
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CN201210361082.3A CN103687018B (zh) | 2012-09-25 | 2012-09-25 | 一种控制信道处理方法 |
CN201210361082.3 | 2012-09-25 |
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CN105375963A (zh) * | 2014-08-27 | 2016-03-02 | 上海贝尔股份有限公司 | 一种用于微小区基站的辐射图可配置的天线 |
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CN107852702B (zh) * | 2015-08-14 | 2020-04-21 | 华为技术有限公司 | 空分复用处理方法、装置及设备 |
CN109891966B (zh) * | 2016-11-03 | 2023-05-30 | Oppo广东移动通信有限公司 | 传输信号的方法、终端设备和网络设备 |
CN109089292B (zh) * | 2017-06-14 | 2020-08-14 | 电信科学技术研究院 | 信息处理方法、装置、设备及计算机可读存储介质 |
CN107453855B (zh) * | 2017-06-30 | 2020-09-29 | 西安华为技术有限公司 | 一种控制信道发送方法及装置 |
JP6998723B2 (ja) * | 2017-10-16 | 2022-01-18 | 株式会社Nttドコモ | 無線通信システムの評価装置 |
CN110621070B (zh) * | 2018-06-19 | 2022-11-01 | 中兴通讯股份有限公司 | 一种资源调度方法、基站及计算机存储介质 |
US11723014B2 (en) | 2019-04-16 | 2023-08-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Controlling transmitter output |
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WO2011148632A1 (ja) * | 2010-05-27 | 2011-12-01 | 京セラ株式会社 | 基地局及び基地局の通信方法 |
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US9179319B2 (en) * | 2005-06-16 | 2015-11-03 | Qualcomm Incorporated | Adaptive sectorization in cellular systems |
WO2008013173A1 (fr) * | 2006-07-24 | 2008-01-31 | Panasonic Corporation | Dispositif de réception, dispositif de transmission et procédé de communication |
JP4988379B2 (ja) * | 2007-02-23 | 2012-08-01 | 京セラ株式会社 | 無線基地局及びチャネル割当情報送信方法 |
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CN101485215A (zh) * | 2006-07-07 | 2009-07-15 | 艾利森电话股份有限公司 | 使用波束成形的无线通信系统中的资源调度 |
CN102257858A (zh) * | 2008-12-19 | 2011-11-23 | 爱立信电话股份有限公司 | 自适应传输选择 |
CN101820669A (zh) * | 2010-01-28 | 2010-09-01 | 北京邮电大学 | 一种pdcch资源分配的方法和装置 |
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CN105375963A (zh) * | 2014-08-27 | 2016-03-02 | 上海贝尔股份有限公司 | 一种用于微小区基站的辐射图可配置的天线 |
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EP2876963A4 (en) | 2015-09-09 |
CN103687018B (zh) | 2016-12-21 |
EP2876963A1 (en) | 2015-05-27 |
JP5990331B2 (ja) | 2016-09-14 |
CN103687018A (zh) | 2014-03-26 |
JP2015529423A (ja) | 2015-10-05 |
EP2876963B1 (en) | 2017-11-01 |
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