WO2009065263A1 - A method for dividing permutation zone of subcarriers and an information configuration system - Google Patents
A method for dividing permutation zone of subcarriers and an information configuration system Download PDFInfo
- Publication number
- WO2009065263A1 WO2009065263A1 PCT/CN2007/003320 CN2007003320W WO2009065263A1 WO 2009065263 A1 WO2009065263 A1 WO 2009065263A1 CN 2007003320 W CN2007003320 W CN 2007003320W WO 2009065263 A1 WO2009065263 A1 WO 2009065263A1
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- arrangement area
- subcarrier arrangement
- configuration
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- subcarrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
Definitions
- the present invention relates to the field of communications, and in particular, to a method for dividing a subcarrier arrangement region in an orthogonal frequency division multiple access system, and a method for orthogonal frequency A subcarrier arrangement area division information allocation system in a divisional multiple access system.
- OFDM Orthogonal Frequency Division Multiplexing
- OFDM Orthogonal Frequency Division Multiplexing
- MIMO Multiple Input Multiple Output
- the technical advantage is more suitable for broadband mobile communication systems and is recognized as one of the core technologies of the next generation mobile communication system.
- the IEEE 802.16e standard which uses OFDMA technology as the core technology of the physical layer and takes into account mobility and broadband characteristics, is a strong competitor of the next generation mobile communication standard.
- the 802.16 standard divides a carrier frequency into a plurality of segments, and each segment includes a non-overlapping subcarrier set in the carrier frequency, which is used due to the orthogonality of the OFDM subcarriers. There is no co-channel interference between adjacent cells with different segments of the same carrier frequency.
- the precondition for this is that the division rules of each segment subcarrier must be the same, that is, the subcarrier arrangement (Permutation) must be consistent.
- each segment has only the default subcarrier scheduling area (Permutation Zone) of Partial Usage of Sub Channels (PUSC), which is easy to satisfy the above conditions.
- the 802.16 standard has developed a variety of Permutation methods in the OFDMA physical layer to support various optional enhancement techniques, including PUSC, Full Usage of Subchannels (FUSC), Full Subchannel PUSC, and optional.
- FUSC Full Usage of Subchannels
- AMC Adjacent Subcarrier Allocation
- TUSCl Tile Usage of Subchannels -1
- TUSC2 Tile Usage of Subchannels -2
- Permutation methods can appear in one frame at the same time, and are divided by Permutation Zone, as shown in Figure 1.
- the transition between the downlink zones is based on the Space Time Coding Downlink Zone Information Element in the Downlink Map (DL-Map).
- the OFDMA symbol offset (Symbol offset) in the above message is an 8-bit field, which is used to identify the starting position of the Zone. It can be seen that which zones are in each frame, and the OFDMA symbol offset of each zone can be dynamically adjusted in each frame according to a certain strategy.
- Length 4 Length 0x03
- OFDMA symbol 8 Denotes the start of the zone(counting Offset from the frame preamble and starting from
- the Renumbering Sequence re-arranges the physical Cluster to form a logical Cluster, and then assigns the logical Cluster to the subchannel group (for the 1024 Fast Fourier Transform (FFT), the downlink contains 6 subchannel groups. ).
- Data subcarrier mapping according to formula (1): subcarrier (k, s) N subchanneh - n t + ⁇ p s [n k mod N subchannels ] + DL _ PermBase ⁇ mod N subcha hide h ( j ) where Indicates the number of subchannels; S represents the subchannel number from 0 to N subcha nnels-1; k represents the subcarrier number within the subchannel; represents ( A + 13 ' i) mGd N_ "; subcarrier(k, s) Indicates the physical subcarrier number corresponding to the kth subcarrier in the subchannel s; represents the sequence obtained by rotating the permutation sequence to the left s times; DL—PermBas
- the location of the pilot is identified by the location defined in the cluster, as shown in FIG. As can be seen from Figure 2, when the odd/even symbols of the Cluster are different, the positions of the pilots are different.
- Bin AMC adjacent subcarrier arrangement
- the Bin is composed of 9 subcarriers that are physically consecutive.
- 1024 FFT there are 96 bins in a symbol, and Bin is continuously arranged in descending order of physical subcarriers, from 0 to 95.
- SegmentO occupies a subchannel group (0, 1) and is constructed using PUSC + PUSC MIMO + Band AMC.
- the PUSC Zone symbol offset is from 1 to 4; the PUSC MIMO Zone symbol offset is from 5 to 14; the Band AMC Zone symbol offset is 15 to 30.
- Band AMC Zone uses logical BandO to logical Band3.
- Segment 1 occupies the subchannel group (2, 3) and is constructed using PUSC + PUSCMIMO + Band AMC.
- the PUSC Zone symbol offset is from 1 to 4; the PUSC MIMO Zone symbol offset is from 5 to 8; and the Band AMC Zone symbol offset is 9 to 30.
- Band AMC Zone uses logical Band4 to logical Band7.
- the present invention provides a method for partitioning subcarrier alignment regions in an orthogonal frequency division multiple access system, and a method for orthogonal frequency division multiple access systems.
- the sub-carrier arrangement area division information configuration system.
- a method for dividing a subcarrier arrangement region in an orthogonal frequency division multiple access system includes the following steps: a configuration unit configures subcarrier alignment region division information, and sends subcarrier alignment region division information to The synchronization unit is configured to configure the synchronization unit to calculate the configuration effective frame number, and send the subcarrier alignment area division information and the configuration effective frame number to the base station; the base station divides the subcarrier arrangement area according to the subcarrier arrangement area division information and the configuration effective frame number.
- the configuration unit indicates the subcarrier arrangement area division information by using a subcarrier arrangement area division table.
- the subcarrier arrangement area division table includes one or more of the following information: area type information, an area allocation period, an offset in the area allocation period, and an area start symbol offset.
- the method for configuring the synchronization unit to calculate the configuration effective frame number is: the current frame number plus the maximum delay time for transmitting the subcarrier arrangement area division information to each base station.
- the configuration synchronization unit determines the maximum delay time according to the number of base stations and the specific implementation of the orthogonal frequency division multiple access system.
- the subcarrier arrangement area dividing method according to the embodiment of the present invention further includes the following steps: The base station dynamically schedules each subcarrier arrangement area with the same subcarrier arrangement manner.
- the subcarrier arrangement area division method further includes the following steps: When the user requests access to the subcarrier arrangement area, the base station determines whether the user is allowed to access the subcarrier arrangement area according to the carrier interference ratio of the user.
- the process of determining, by the base station, whether the user is allowed to access includes the following steps: the base station calculates the bandwidth of the medium access control layer allocated to the user according to the carrier interference ratio of the user and the remaining time slots in the subcarrier arrangement area; Control layer bandwidth The user is allowed to access the subcarrier arrangement area, and the user is not allowed to access the subcarrier arrangement area, where the remaining time slots in the subcarrier arrangement area satisfy the existing users in the subcarrier arrangement area. The remaining time slots after the quality of service.
- the subcarrier arrangement area division method further includes the following steps: The base station determines whether to allow access to the user to switch according to the quality of service and channel conditions of the access user and the remaining time slots in the target subcarrier arrangement area. Go to the target subcarrier arrangement area; and if the remaining time slots in the target subcarrier arrangement area satisfy the access guard's service shield, and the access user's channel condition allows the access user to perform handover, the base station performs access to the access user. The handover, where the remaining time slots in the target subcarrier arrangement area are the remaining time slots after satisfying the quality of service of the existing users in the target subcarrier arrangement area.
- a subcarrier arrangement area division information configuration system for use in an orthogonal frequency division multiple access system includes: a configuration unit configured to configure subcarrier alignment area division information, and divide the subcarrier arrangement area The information is sent to the configuration synchronization unit.
- the synchronization unit is configured to calculate the configuration effective frame number, and send the subcarrier alignment area division information and the configuration effective frame number to the base station.
- the configuration unit indicates the subcarrier arrangement area division information by using a subcarrier arrangement area division table.
- the subcarrier arrangement area division table includes one or more of the following information: area type information, area allocation period, offset in the area allocation period, and area start symbol offset.
- the method for configuring the synchronization unit to calculate the configuration effective frame number is: the current frame number plus the maximum delay time for transmitting the subcarrier arrangement area division information to each base station.
- the configuration synchronization unit determines the maximum delay time according to the number of base stations and the specific implementation of the orthogonal frequency division multiple access system.
- FIG. 1 is a schematic diagram showing the logical structure of an OFDMA frame according to an embodiment of the present invention
- 2 is a schematic diagram of a cluster structure according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of interference between multiple zones between different segments according to an embodiment of the present invention
- FIG. 4 is a diagram of an OFDMA multi-bone wireless communication system according to an embodiment of the present invention.
- FIG. 5A to FIG. 5D are diagrams showing an example of dynamic zone division according to an embodiment of the present invention
- FIG. 6 is a diagram showing an example of dynamic zone division according to another embodiment of the present invention.
- DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to solving the co-channel interference problem of an OFDMA multi-Zone application scenario.
- the method and system for uniformly configuring the position of the frame and the frame appearing in the Permutation Zone in the whole network provided by the present invention (that is, the subcarrier arrangement area division method and the subcarrier arrangement area division information configuration system according to the embodiment of the present invention) can ensure the same At the time point, the sub-carriers of all the segments in the whole network are in the same manner.
- the present invention also provides a method for improving resource utilization under the fixed zone.
- a system for uniformly configuring the position of a frame and a frame in a Permutation Zone including an operation and maintenance console (OMC) and a base station, wherein the OMC is connected to each base station in the entire network, and the OMC includes a configuration unit and a configuration synchronization unit.
- OMC operation and maintenance console
- the method for dividing the Permutation Zone by using the system shown in FIG. 4 includes the following steps:
- Zone Partition table is in the following format:
- the Zone Type indicates the Zone type index. Each Zone type corresponds to a set of Zone feature parameters.
- the zone carriers in the Zones identified by different Zone Types are arranged differently (for example, different Permutation > Permbase, etc.).
- Frame Intval indicates the period in which the zone is allocated, in units of frames, that is, in the Frame Intval frame, the zone is divided into the zone, and the Frame Offset represents the offset of the zone in the period Frame Intval.
- the end symbol of the zone is equal to the start symbol -1 of the next zone. If there is no next zone, the end symbol of the zone is equal to the last symbol of the zone.
- the Mandatory PUSC Zone containing FCH and DL Map as specified in the 802.16 protocol must be present for each frame, and Symbol Offset -1, the default zone may not be recorded in the above table (or the zone is displayed, but changes are not allowed, as described later) Indicated as PUSC0).
- the configuration unit sends the configuration data to the configuration synchronization unit.
- the configuration synchronization unit calculates the configuration effective frame number, and the calculation method is the current frame number plus the maximum delay time of each base station, and the delay may be a fixed empirical value, or may be related to the number of base stations that need to be synchronized, and the specific system. Realization related.
- the configuration synchronization unit sends configuration data to each base station, which includes the zone partition table in step A and the configuration effective frame number in step B.
- each base station allocates a zone according to the configuration valid frame number and the new zone partition table according to the configuration effective frame number.
- This method can support any zone. By configuring parameters, the air interface bandwidth can be fully utilized, and the unified configuration of the entire network zone can be realized.
- the number of zones allocated in one frame can meet the protocol requirements (in the 16e protocol). There is a limit on the number of zones included in the downlink subframe.
- the scheme can divide the zone according to the actual traffic demand, that is, the composition of the Zone Type in one frame can be configured, and the bandwidth utilization is high.
- the absolute frame number of the entire network is consistent. All base transceiver stations (BTSs) are uniformly switched, and the same-frequency multi-zone networking can be realized while using the bandwidth as much as possible.
- the simplest application of this method is to divide the Zone within the same subframe. That is, in each sub-frame, the area and position of the Zone are defined for each type of zone, as shown in FIG. 6. The number of zones (n), position (Pos), and length (length in symbol) can be determined according to actual needs. After the zone is delimited, there will be no co-channel interference in the whole network. The use of a fixed partition to implement the same-frequency networking requires a corresponding scheduling mechanism. Otherwise, the utilization of radio resources will inevitably be reduced. Because the division of the Zone is fixed, If the amount of data in a zone is small, the resources in the zone are wasted. In order to solve this problem, the following method is proposed according to an embodiment of the present invention:
- Zones with the same subcarrier arrangement are considered together for data distribution, but the boundary of Zone-Allocation is also required.
- the carrier arrangement of the two zones can be the same, but it needs to be divided into two zones. In this case, the two parts of the total resources can be considered together, so that the actual needs of PUSC and PUSC-MIMO users can be fully considered, while the data on other segments are not interfered.
- the admission control is based on the current carrier-to-interference and noise ratio (CINR) (or the supported maximum modulation coding level (MCS)), and the access control goes to the admission control.
- CINR current carrier-to-interference and noise ratio
- MCS supported maximum modulation coding level
- the MCS of the terminal can be obtained, and the number of slots (Slots) remaining in the case of satisfying the quality of service (QoS) of the existing users in the PUSC-Zone is calculated to calculate the medium access control layer (MAC) that can be allocated to the terminal.
- MAC medium access control layer
- the specific method is as follows: The system according to the basic requirements of the access user's QoS, and the number of remaining slots of the zone after satisfying the requirements of the existing terminal's QoS (meeting the minimum requirements of QoS), and the channel conditions of the user (for example, channel stability), Determine if the user is allowed to switch to another zone. If the corresponding target zone satisfies the QoS of the existing terminal, the remaining bandwidth can also satisfy the QoS of the new user, and The channel condition allows the user to switch between zones, then the system initiates the user's switching between zones. Switch the user from the current zone to the target zone (for example, switch from PUSC to AMC).
- the target zone for example, switch from PUSC to AMC
- the composition of the zones in different frames is different, the physical bandwidth remaining after the different zones mentioned in the previous section satisfy the QoS is a statistical value, and the period of the statistics depends on the specific design (or demand). For example, it can be counted in 0.2 seconds or 0.5 seconds, or it can be counted in 1 second, depending on the specific operational needs.
- the configuration of the downlink multi-zone is as shown in Table 4: Table 4 Example of zone division configuration
- PUSC0 is the mandatory zone of the downlink subframe.
- the absolute frame number FrameNo of the whole network is 4*k, 4*k+l, 4*k+2, 4*k+3, the downlink subframe configuration is as shown in FIGS. 5A, 5B, 5C, and 5D, respectively.
- the mapping relationship of subcarriers corresponding to all BSs is the same at any time (symbol). Then the data on these zones will not be disturbed.
- the number of zones in a frame satisfies the protocol requirements. Since a plurality of different Zone types exist in a certain period of time, the resource utilization rate can be improved by the method of the embodiment of the present invention.
- ⁇ PUSC ( 0 ) and PUSC ( 1 ) are two zones with the same subcarrier arrangement. But for different applications (for example, PUSC, and PUSC-MIMO), assume that the total bandwidth of the two zones is added to 300 Slots. At this time, there are 2 users, User 1 and User 2. User 1 can only be placed in PUSC. In the Zone of ( 0 ), User 2 can only be placed in PUSC ( 2 ). Considering the situation of 2 user bandwidth requirements, Case 1) User 1 has a bandwidth requirement of 150 Slots and User 2 has 150 Slots; Case 2) User 1 has a bandwidth of 120 Slots and User 2 has a bandwidth of 180 Slots.
- Zone Compared to the method defined by Zone, if the size of two zones (position) is 150, 150, then in the case of user 1), two Users can be satisfied and bandwidth is not wasted. In the case of user situation 2), the demand of all 120 Slots of the first user can be satisfied, but the demand of 180 users of the second user can only be satisfied. Thus, the PUSC ( 0 ) Zone has 30 Slots of space wasted, and User 2's bandwidth is not satisfied. At this point, the system bandwidth is not fully utilized. If dynamic scheduling is adopted, the division of the zone is determined according to the actual needs of the users under the zone.
- the size of PUSC ( 0 ) and the size of PUSC ( 1 ) are equal to 150 Slots 0 case 2 )
- the bandwidth of PUSC ( 0 ) is 120 Slots
- the PUSC(l)-Zone has a bandwidth of 180.
- the positions of the two zones PUSC ( 0 ) and PUSC ( 1 ) have changed, which is dynamic scheduling. Through dynamic scheduling, it is possible to ensure that there is no interference between user data in the area where the same subcarriers are arranged, and the bandwidth utilization can be improved.
- the downlink subframe contains three zones, namely PUSC, PUSC-MIMO, and Band-AMC.
- SBC basic capability negotiation
- the user can support the zone type supported by the user. Then the user may only support PUSC, or support ⁇ , or Band-AMC. Since the location of the zone in which the different subcarriers are arranged needs to be delimited, it is easy to cause too many users to be allocated to the PUSC-Zone, causing the PUSC-Zone to be filled up and the other zone gaps. In this case, load sharing is required. When the user accesses, it will definitely pass the admission control.
- whether or not to accept the new user is determined by the free bandwidth, the user's MCS, and the supported zone type. For example, user 0 is trying to access the system. After the SBC is completed, the user is found to support PUSC, PUSC-MIMO, and Band-AMC. At this time, the system judges the remaining bandwidth of different types of zones to satisfy the QoS of the existing users. For example, PUSC is 20 Slot, MIMO is 30 Slot, AMC is 30 Slot, and the user's current CINR (FEC) is obtained, for example, 16Qaml/2.
- FEC current CINR
- the bandwidth requirement for the user to meet QoS at this time is 96kbps. Since the user supports MIMO and AMC modes, and any remaining bandwidth provided by one zone can satisfy the QoS bandwidth requirement of the user, then choose to accept The user is in the system. Since the user does not necessarily operate in a non-PUSC manner after accessing the system, after being admitted, the user is first placed in the PUSC area.
- User 1 supports PUSC and MIMO after SBC, and the QoS requirement is 96 kbps.
- the system accepts the user and is expected to be placed in the MIMO Zone to update the remaining bandwidth of the zone.
- the new user 3 appears.
- the FEC of the user supporting PUSC is also 16Qaml/2, and the QoS requirement is 96kbps.
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Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010534338A JP5264926B2 (ja) | 2007-11-23 | 2007-11-23 | サブキャリア配列領域の分割方法及び情報配置システム |
| KR1020107005234A KR101366478B1 (ko) | 2007-11-23 | 2007-11-23 | 서브 캐리어 배열 영역 분할 방법 및 정보 배치 시스템 |
| CN2007800534670A CN101682843B (zh) | 2007-11-23 | 2007-11-23 | 子载波排列区域划分方法及信息配置系统 |
| US12/744,321 US8411637B2 (en) | 2007-11-23 | 2007-11-23 | Method for dividing a subcarrier permutation zone and an information configuration system |
| PCT/CN2007/003320 WO2009065263A1 (en) | 2007-11-23 | 2007-11-23 | A method for dividing permutation zone of subcarriers and an information configuration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2007/003320 WO2009065263A1 (en) | 2007-11-23 | 2007-11-23 | A method for dividing permutation zone of subcarriers and an information configuration system |
Publications (1)
| Publication Number | Publication Date |
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| WO2009065263A1 true WO2009065263A1 (en) | 2009-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/CN2007/003320 Ceased WO2009065263A1 (en) | 2007-11-23 | 2007-11-23 | A method for dividing permutation zone of subcarriers and an information configuration system |
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| Country | Link |
|---|---|
| US (1) | US8411637B2 (zh) |
| JP (1) | JP5264926B2 (zh) |
| KR (1) | KR101366478B1 (zh) |
| CN (1) | CN101682843B (zh) |
| WO (1) | WO2009065263A1 (zh) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8130780B2 (en) | 2007-06-15 | 2012-03-06 | Futurewei Technologies, Inc. | Method and apparatus for assigning resources in a wireless system with multiple regions |
| US8259662B2 (en) * | 2008-02-19 | 2012-09-04 | Futurewei Technologies | Method and apparatus for assigning persistent resources dynamically in a wireless communication system |
| US8644154B2 (en) * | 2009-02-20 | 2014-02-04 | Clearwire Ip Holdings Llc | Predictive throughput management |
| US8374101B2 (en) * | 2009-07-30 | 2013-02-12 | Nec Laboratories America, Inc. | Multicast with joint layer resource allocation in broadband wireless networks |
| KR101943821B1 (ko) * | 2011-06-21 | 2019-01-31 | 한국전자통신연구원 | 무선 통신 시스템에서 제어채널 송수신 방법 |
| CN111130614B (zh) * | 2018-10-30 | 2021-10-26 | 华为技术有限公司 | 一种卫星通信的时延指示方法及装置 |
| CN113923687B (zh) * | 2020-07-10 | 2023-08-22 | 大唐移动通信设备有限公司 | 一种调制与编码策略mcs值调整方法及装置 |
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| US5872820A (en) * | 1996-09-30 | 1999-02-16 | Intel Corporation | Synchronization in TDMA systems in a non-realtime fashion |
| KR100876757B1 (ko) * | 2003-10-31 | 2009-01-07 | 삼성전자주식회사 | 통신 시스템에서 서브 채널 구성 시스템 및 방법 |
| DE602004022932D1 (de) * | 2004-07-13 | 2009-10-15 | Alcatel Lucent | Verfahren zur endgeräteunterstützen Interferenzkontrolle in einem Mehrträger-Mobilkommunikationssystem |
| JP2006129194A (ja) * | 2004-10-29 | 2006-05-18 | Kddi Corp | 移動通信システムおよび同システムにおけるチャネル配置方法 |
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- 2007-11-23 US US12/744,321 patent/US8411637B2/en not_active Expired - Fee Related
- 2007-11-23 WO PCT/CN2007/003320 patent/WO2009065263A1/zh not_active Ceased
- 2007-11-23 KR KR1020107005234A patent/KR101366478B1/ko not_active Expired - Fee Related
- 2007-11-23 JP JP2010534338A patent/JP5264926B2/ja not_active Expired - Fee Related
- 2007-11-23 CN CN2007800534670A patent/CN101682843B/zh not_active Expired - Fee Related
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| WO2006000091A1 (en) * | 2004-06-24 | 2006-01-05 | Nortel Networks Limited | Preambles in ofdma system |
| WO2006034577A1 (en) * | 2004-09-30 | 2006-04-06 | Nortel Networks Limited | Channel sounding in ofdma system |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2011504692A (ja) | 2011-02-10 |
| JP5264926B2 (ja) | 2013-08-14 |
| CN101682843A (zh) | 2010-03-24 |
| KR20100075434A (ko) | 2010-07-02 |
| US20100265911A1 (en) | 2010-10-21 |
| US8411637B2 (en) | 2013-04-02 |
| CN101682843B (zh) | 2012-10-03 |
| KR101366478B1 (ko) | 2014-02-21 |
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