CN114449534B - Multi-RRU cell wireless network based on baseband combining macro diversity - Google Patents
Multi-RRU cell wireless network based on baseband combining macro diversity Download PDFInfo
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- CN114449534B CN114449534B CN202210135902.0A CN202210135902A CN114449534B CN 114449534 B CN114449534 B CN 114449534B CN 202210135902 A CN202210135902 A CN 202210135902A CN 114449534 B CN114449534 B CN 114449534B
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- 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
- H04W16/18—Network planning tools
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- 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
- H04B7/0413—MIMO systems
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- 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
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- 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
Abstract
The invention discloses a multi-RRU cell wireless network based on baseband combining macro diversity, which has high transmission reliability and high speed. The multi-RRU cell wireless network of the invention comprises: a baseband processing unit (1), an expansion unit (2) and a plurality of remote radio frequency units (3); the expansion unit (2) is internally split into a first sub-expansion unit (21) and a second sub-expansion unit (22), and the first sub-expansion unit (21) and the second sub-expansion unit (22) are mutually independent; each sub-extension unit is in signal connection with at most 4 remote radio frequency units (3).
Description
Technical Field
The invention belongs to the technical field of wireless communication, and particularly relates to a baseband combining macro diversity method based on single EU.
Background
The multi-RRU cell merging is to merge a plurality of RRUs (Remote Radio Unit, remote radio units) into one cell, so that the wireless coverage area of the cell is improved, and the data throughput of a single cell is improved. In this cell, all RRUs use the same PCI (Physical Cell Identifier, physical cell identity). The cell adopts RRU joint scheduling, namely, a downlink physical channel adopts multi-RRU joint transmission, and an uplink physical channel adopts all receiving and selective receiving. The multi-RRU joint transmission means that a plurality of RRUs in a cell simultaneously transmit the same data on the same time-frequency resource through joint scheduling.
Compared with the networking mode that each RRU is a cell in the common case, the control channels of the RRUs in the cells combined by the RRUs are not interfered, and the gain can be obtained through joint transmission.
As shown in fig. 1, the multi-RRU cell wireless network formed by combining the existing multi-RRU cells includes a baseband processing Unit (BU, building Base band Unit), a plurality of Extension Units (EU), and a plurality of remote radio units (Remote Radio Unit, RRU); each baseband processing unit is in signal connection with 4 expansion units at most, and each expansion unit is in signal connection with 8 remote radio frequency units at most.
The multi-RRU cell wireless network performs a radio frequency combining process on an EU (extension Unit), and performs a baseband combining process on a physical layer Unit of a BBU (Building Base band Unit, baseband processing Unit). Since each EU can support a radio frequency combining process of 8 RRUs at maximum, the BBU physical layer supports a baseband combining process of 4 EUs, and thus a single cell can support a cell combining process of 32 RRUs at maximum. After uplink and downlink of a plurality of EUs are accurately synchronized, the baseband combination utilizes the MIMO technology to form macro diversity combination. RRU between EU improves channel gain and data throughput through uplink and downlink MIMO channel multiplexing and diversity technology.
However, the above multi-RRU cell wireless network has problems of insufficient transmission reliability and insufficient transmission rate due to the noise rise of the multiple RRUs and the wireless infection between the RRUs.
Disclosure of Invention
The invention aims to provide a multi-RRU cell wireless network based on baseband combining macro diversity, which has high transmission reliability and high speed.
The technical solution for realizing the purpose of the invention is as follows:
a multi-RRU cell wireless network based on baseband combining macro diversity, comprising: a baseband processing unit 1, an extension unit 2, and a plurality of remote radio frequency units 3; the expansion unit 2 is internally split into a first sub-expansion unit 21 and a second sub-expansion unit 22, and the first sub-expansion unit 21 and the second sub-expansion unit 22 are mutually independent; each sub-extension unit is signal-connected to at most 4 remote radio units 3.
Compared with the prior art, the invention has the remarkable advantages that:
high transmission reliability and high speed: the invention splits EU into two independent sub-extension units, RRU in independent area under single EU executes baseband macro diversity combination, provides diversity gain and multiplexing gain through the enhancement of MIMO technology, ensures the transmission reliability of the system and improves the transmission rate of the system. When the number of the RRUs in a single cell in the network arrangement is smaller than 8, EU resources are saved, and the reliability of transmission and the data throughput are improved.
The invention is described in further detail below with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a block diagram of a prior art multi-RRU cell combination.
Fig. 2 is a block diagram of a multi-RRU cell wireless network based on baseband combining macro diversity in accordance with the present invention.
In the figure, a baseband processing unit 1, an expansion unit 2 and a remote radio frequency unit 3;
a first sub-expansion unit 21 and a second sub-expansion unit 22.
Detailed Description
As shown in fig. 2, the structure block diagram of the multi-RRU cell wireless network based on baseband combining macro diversity of the present invention includes:
a baseband processing unit 1, an extension unit 2, and a plurality of remote radio frequency units 3;
the expansion unit 2 is internally split into a first sub-expansion unit 21 and a second sub-expansion unit 22, and the first sub-expansion unit 21 and the second sub-expansion unit 22 are mutually independent;
each sub-extension unit is signal-connected to at most 4 remote radio units 3.
The front-end card of the baseband processing unit 1 is connected with the expansion unit 2 through a 10G optical fiber.
The plurality of remote radio units 3 connected to the same sub-extension unit are located in the same independent area within the cell.
The plurality of remote radio units 3 in the same independent area in the cell execute baseband macro diversity combining and are enhanced by the MIMO technology.
The invention executes EU splitting in EU, splits EU into two independent expansion units, and RRU in independent area under single EU executes baseband macro diversity combining, provides diversity gain and multiplexing gain through the enhancement of MIMO technology, ensures the transmission reliability of the system and improves the transmission rate of the system. When the number of the RRUs in the single cell in the network arrangement is smaller than 8, the method saves EU resources and improves transmission reliability and data throughput.
The data of 4 antennas can be carried for NR cells by 10G optical fiber transmission between the forward transmission and EU. The EU is split into two independent expansion units, the first 4 optical ports being the first expansion unit 21, carrying the first 4 RRU radio frequency combined 2T2R data. The last 4 ports are second expansion units 22 carrying the data of the 2T2R after radio frequency combining of the last 4 RRUs. The BBU performs macro diversity enhancement by MIMO on the wireless uplink data of the first extension unit 21 and the first extension unit 22.
The uplink data of the first sub-expansion unit 21 and the second sub-expansion unit 22, which are radio-frequency combined, are baseband combined using MIMO technology.
Each remote radio unit 3 is provided with 2 antennas.
After EU splitting, the data of the first 4 RRU radio frequency merges with the uplink data of the last 4 RRU radio frequency merges, and baseband merges are performed by using MIMO technology. Multiple transmitting antennas and receiving antennas (two antennas of each RRU, and two RRUs are equivalent to 4 antennas) are used at the transmitting end and the receiving end respectively, so that signals are transmitted and received through the multiple antennas at the transmitting end and the receiving end, and the communication quality is improved. The system can fully utilize space resources, realize multiple transmission and multiple reception through a plurality of antennas, and can doubly improve the system channel capacity under the condition of not increasing frequency spectrum resources and antenna transmitting power.
Claims (1)
1. A multi-RRU cell wireless network based on baseband combining macro diversity, comprising:
a baseband processing unit (1), an expansion unit (2) and a plurality of remote radio frequency units (3);
the expansion unit (2) is internally split into a first sub-expansion unit (21) and a second sub-expansion unit (22), and the first sub-expansion unit (21) and the second sub-expansion unit (22) are mutually independent;
each sub-expansion unit is in signal connection with 4 remote radio frequency units (3) at most;
the front-end card of the baseband processing unit (1) is connected with the expansion unit (2) through a 10G optical fiber;
a plurality of remote radio frequency units (3) connected with the same sub-expansion unit are positioned in the same independent area in the cell;
the plurality of remote radio frequency units (3) in the same independent area in the cell execute baseband macro diversity combination and are enhanced by the MIMO technology;
the uplink data of the first sub-expansion unit (21) and the second sub-expansion unit (22) which are subjected to radio frequency combination are subjected to baseband combination by utilizing the MIMO technology;
each remote radio unit (3) is provided with 2 antennas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210135902.0A CN114449534B (en) | 2022-02-15 | 2022-02-15 | Multi-RRU cell wireless network based on baseband combining macro diversity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210135902.0A CN114449534B (en) | 2022-02-15 | 2022-02-15 | Multi-RRU cell wireless network based on baseband combining macro diversity |
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| Publication Number | Publication Date |
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| CN114449534A CN114449534A (en) | 2022-05-06 |
| CN114449534B true CN114449534B (en) | 2023-09-08 |
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| CN202210135902.0A Active CN114449534B (en) | 2022-02-15 | 2022-02-15 | Multi-RRU cell wireless network based on baseband combining macro diversity |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211195A (en) * | 2016-08-31 | 2016-12-07 | 武汉邮电科学研究院 | A kind of indoor distributed covering system of LTE and method |
| CN110278572A (en) * | 2019-06-24 | 2019-09-24 | 京信通信系统（中国）有限公司 | Data transmission method, main computer unit, expanding element and base station system |
| CN111988856A (en) * | 2020-08-19 | 2020-11-24 | 上海共进信息技术有限公司 | Multi-radio-frequency unit baseband combination method of extension unit of 4G/5G distributed small base station |
| WO2021032071A1 (en) * | 2019-08-22 | 2021-02-25 | 三维通信股份有限公司 | Method, device, and system for reducing reception noise floor for base station, and readable storage medium |
| CN113709877A (en) * | 2021-08-12 | 2021-11-26 | 联想(北京)有限公司 | Information processing method and device, communication equipment and storage medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547778B (en) * | 2012-01-06 | 2014-12-10 | 京信通信系统（中国）有限公司 | Wireless communication system of flat network architecture, method and expansion unit |
-
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- 2022-02-15 CN CN202210135902.0A patent/CN114449534B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211195A (en) * | 2016-08-31 | 2016-12-07 | 武汉邮电科学研究院 | A kind of indoor distributed covering system of LTE and method |
| CN110278572A (en) * | 2019-06-24 | 2019-09-24 | 京信通信系统（中国）有限公司 | Data transmission method, main computer unit, expanding element and base station system |
| WO2021032071A1 (en) * | 2019-08-22 | 2021-02-25 | 三维通信股份有限公司 | Method, device, and system for reducing reception noise floor for base station, and readable storage medium |
| CN111988856A (en) * | 2020-08-19 | 2020-11-24 | 上海共进信息技术有限公司 | Multi-radio-frequency unit baseband combination method of extension unit of 4G/5G distributed small base station |
| CN113709877A (en) * | 2021-08-12 | 2021-11-26 | 联想(北京)有限公司 | Information processing method and device, communication equipment and storage medium |
Non-Patent Citations (1)
| Title |
|---|
| "WCDMA室内分布系统设计与研究";余腾飞;《中国优秀硕士学位论文全文数据库 信息科技辑》;全文 * |
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