WO2010130120A1 - WiMAX演进系统下行子帧分配、信息传输及获取方法 - Google Patents
WiMAX演进系统下行子帧分配、信息传输及获取方法 Download PDFInfo
- Publication number
- WO2010130120A1 WO2010130120A1 PCT/CN2009/074140 CN2009074140W WO2010130120A1 WO 2010130120 A1 WO2010130120 A1 WO 2010130120A1 CN 2009074140 W CN2009074140 W CN 2009074140W WO 2010130120 A1 WO2010130120 A1 WO 2010130120A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- downlink
- subframe
- unit frame
- frame
- subframes
- Prior art date
Links
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
- H04W72/0446—Resources in time domain, e.g. slots or frames
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/34—Reselection control
- H04W36/38—Reselection control by fixed network equipment
- H04W36/385—Reselection control by fixed network equipment of the core network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
- H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
-
- 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
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to the field of wireless communications, and more particularly to a method for downlink subframe allocation, allocation information transmission, and terminal acquisition of downlink subframe allocation information by a next-generation WiMAX (Worldwide Interoperability for Microwave Access) system.
- WiMAX Worldwide Interoperability for Microwave Access
- OFDM Orthogonal Frequency Division Multiplexing
- OFDM greatly reduces the system's sensitivity to multipath fading channel frequency selectivity by converting high-speed data streams into low-speed parallel data streams.
- OFDM further enhances the system's ability to resist intersymbol interference.
- the high bandwidth utilization and simple implementation make OFDM more and more widely used in wireless communication.
- a WiMAX system based on OFDMA Orthogonal Frequency Division Multiple Access
- Wireless communication technologies are constantly evolving, and market demands are changing. This requires technologies and standards to absorb new technologies through evolving processes while meeting new demands. Through this evolutionary process, standards and systems implemented in accordance with this standard can not only continue their vitality through smooth upgrades, protect the user's existing investment, but also provide more and better services than the old system.
- mobile WiMAX systems based on the IEEE 802.16e (16e) air interface standard have been unable to meet the high transmission rate, high throughput, fast mobility and low latency requirements of broadband mobile communications in the future.
- IEEE 802.16m referred to as 16m
- the 16m system in this document represents a WiMAX system with an air interface standard of IEEE 802.16m, including a backward compatible 16m system (also known as a 16m/16e hybrid system) and a non-backward compatible 16m system (also known as a pure 16m system).
- the base station in the 16m system is called a 16m base station
- the IEEE 802.16m is a 16m downlink subframe defined by a pure 16m system.
- the terminal in a pure 16m system is called a terminal. 16m terminal.
- the 16e system represents a WiMAX system that uses the air interface standard IEEE 802.16e.
- the downlink subframe defined by the IEEE 802.16e for the 16e system is called the 16e downlink subframe, and the terminal in the 16e system is called the 16e terminal.
- the backward compatible 16m system includes both 16m downlink subframes and 16e downlink subframes, which can be both 16m terminals and 16e terminal months.
- FIG. 1 is a schematic diagram of the superframe structure proposed in the current 16m frame structure design.
- the superframe 101 has a length of 20 ms and is composed of four 5 ms unit frames 102, and the superframe control information 103 is located on a number of symbols at the beginning of the superframe.
- the unit frame 102 is composed of 8 subframes 104, and the subframe 104 is divided into a downlink subframe and an uplink subframe, which can be configured according to the system.
- Subframe 104 is composed of six OFDM symbols 105. According to the frame structure of Fig. 1, the 5ms unit frame contains 8 subframe units.
- the 16m system On the basis of a super-frame, a frame and a sub-frame, the 16m system must also consider backward compatibility with existing WiMAX terminals. Therefore, 16m needs to be considered. Subframe and 16e subframe allocation, and reasonable configuration of the frame structure to reduce interference between different configuration systems.
- the Super Frame Header is located in the subframe at the beginning of the superframe.
- the downlink includes a 16e downlink subframe and a 16m downlink subframe. Since different base stations have different 16e and 16m service requirements, in order to enhance the resource utilization of the 16e/16m hybrid system, the mixing ratio of the 16e downlink and the 16m downlink subframe between different base stations can be set to be different, according to the service in the same base station. The mixing ratio of the 16e downlink subframe and the 16m downlink subframe may also be changed with the superframe as the minimum period.
- the relationship between 16e unit frame and 16m unit frame is defined in the current 16m system description file.
- the 16m frame start offset that is, the offset between the 16e unit frame start position and the 16m unit frame start position, and the unit is Subframe, see Figure 2.
- the present invention provides a downlink subframe allocation method of a WiMAX evolution system, which can ensure synchronization symbol alignment between different base stations.
- the present invention provides a method for allocating a downlink subframe of a WiMAX evolution system, where the WiMAX evolution system is an IEEE 802.16m system, and the following IEEE 802.16m is abbreviated as 16m.
- the downlink subframe allocation method includes:
- the 16m frame start offset is set as a parameter of the configuration area range, and all 16m base stations in the same configuration area in the system set the start position of the 16m unit frame according to the 16m frame start offset;
- the 16m base station fixedly allocates a starting subframe of a 16m unit frame as a 16m downlink subframe, and transmits a superframe control header with a synchronization symbol at a start position of the first unit frame in the superframe;
- the 16m base station fixedly allocates a starting subframe of a 16m unit frame as a 16m downlink subframe, and transmits a synchronization symbol at a starting position of the first unit frame in the superframe; the first unit of the 16m base station in the superframe Transmitting a superframe control header in a start subframe of the frame; the synchronization symbol and the superframe control header are time division multiplexed (TDM) in a first unit frame of the superframe;
- TDM time division multiplexed
- the configuration area is a neighboring area coverage configured or determined by an operator.
- the foregoing downlink subframe allocation method may further have the following features:
- the number of downlink subframes of the 16m unit frame is N, and when N ⁇ 3, the starting offset of the 16m frame ranges from [1, N-2];
- N 2
- the 16m frame start offset is 1.
- N is determined by the ratio of the downlink and uplink subframes of the 16m unit frame, and is a parameter of the configuration area range.
- the 16m frame start offset is set to 1 or 2 subframes.
- the foregoing downlink subframe allocation method may further have the following features:
- the WiMAX evolution system is a backward compatible 16m system
- the foregoing downlink subframe allocation method further includes: determining, by the 16m base station, a ratio of a 16m downlink subframe and a 16e downlink subframe in a 16m unit frame according to a current requirement of a 16m service and a 16e service. Further, the foregoing downlink subframe allocation method further includes:
- the 16m base station uses the 16m downlink subframe number in the 16m unit frame as the sector range parameter, and the downlink and uplink of the 16m unit frame set according to the current 16m service and the 16e service requirement of each sector and the associated configuration area range.
- the subframe ratio determines the number of 16m downlink subframes in a 16m unit frame of each sector.
- the foregoing downlink subframe allocation method may further have the following feature: the number of 16m downlink subframes in a 16m unit frame of the same sector changes with a superframe as a minimum period.
- the foregoing downlink subframe allocation method further includes:
- the 16m base station sets a 16m unit according to a preset allocation manner according to a 16m frame start offset set by a range of a configuration area, a downlink subframe number of a 16m unit frame, and a ratio of a 16m downlink subframe and a 16e downlink subframe.
- Each downlink subframe in the frame is allocated as a 16m downlink subframe or a 16e downlink subframe, where a starting subframe of a 16m unit frame is fixedly allocated to a 16m downlink subframe, and a first downlink subframe after an uplink to a downlink transition point.
- Fixed allocation is 16e downlink subframe.
- the foregoing downlink subframe allocation method may further have the following features:
- the starting offset of the 16m frame is L
- the number of downlink subframes of the 16m unit frame is N
- the number of 16m downlink subframes in the N downlink subframes is M, from the starting position of the 16m unit frame to the downlink to the uplink switching point.
- the preset allocation method is as follows:
- M ⁇ P the first M downlink subframes including the start subframe in the 16m unit frame are all allocated as 16m downlink subframes, and the other downlink subframes are all allocated as 16e downlink subframes;
- N > M > P the first to the N-th downlink subframes after the uplink to the downlink transition point in the 16m unit frame are all allocated as 16e downlink subframes, and the other downlink subframes are all allocated as 16m downlink subframes.
- the foregoing method of the present invention supports the downlink subframe allocation of the backward compatible 16m system, so that the ratios of the 16m downlink subframe and the 16e downlink subframe are flexibly configured according to the service requirements of different base stations, and the synchronous transmission of synchronization symbols of different base stations is ensured. Preventing mutual interference caused by misalignment of synchronization symbols does not cause neighboring interference problems due to the proportional change of 16m and 16e downlink subframe configurations. At the same time, when coexisting with other TDD systems, it will not have a great impact on the synchronization channel and the reception of some system access required information.
- the present invention also provides a downlink subframe in a WiMAX evolution system.
- the method for allocating and allocating information transmission enables the base station to flexibly configure the proportion of the 16m and 16e downlink subframes according to service requirements, and can transmit the allocation information of the downlink subframe to the terminal with little overhead.
- the present invention also provides a downlink subframe allocation and allocation information transmission method in a WiMAX evolution system, where the WiMAX evolution system is a backward compatible 16m system, and the transmission method includes: a 16m base station is set according to a range of a configuration area to which it belongs.
- the downlink and uplink subframe ratios of the 16m unit frame and the current 16m service and 16e service requirements determine the number of 16m downlink subframes in the 16m unit frame, and then combine the 16m frame start offset set in the associated configuration area range, according to the pre-
- the allocation mode is allocated to the downlink subframe in the 16m unit frame, where the starting subframe of the 16m unit frame is fixedly allocated as the 16m downlink subframe;
- the 16m base station compares the downlink and uplink subframe ratios of the 16m unit frame, the 16m frame start offset, and
- the 16m downlink subframe number information in the 16m unit frame is written into the superframe control header and broadcast to the 16m terminal.
- the foregoing downlink subframe allocation and allocation information transmission method may further have the following features: the 16m frame start offset and the 16m downlink subframe number information in the 16m unit frame are represented by three bits.
- the foregoing downlink subframe allocation and allocation information transmission method may further have the following features: the number of downlink subframes of the 16m unit frame is N, and when N ⁇ 3, the value range of the 16m frame start offset Is [1, N-2];
- N 2
- the starting offset of the 16m frame is 1
- N is determined by the ratio of the downlink and uplink subframes of the 16m unit frame, which is a parameter of the configuration area range.
- M ⁇ P the first M downlink subframes including the start subframe in the 16m unit frame are all allocated as 16m downlink subframes, and the other downlink subframes are all allocated as 16e downlink subframes;
- N > M > P the first to the NMth downlink subframes after the uplink to the downlink transition point in the 16m unit frame are all allocated as 16e downlink subframes, and the other downlink subframes are all allocated as 16m downlink subframes.
- the allocation of 16m subframes and 16e subframes can be dynamically set according to the actual service requirements of the backward compatible 16e system.
- different 16m and 16e downlinks can be indicated by a small overhead. The change in the way the frame is allocated.
- the present invention also provides a method for acquiring downlink subframe allocation information by a 16m terminal in a WiMAX evolution system, so that a 16m terminal can quickly and simply acquire allocation information of a 16m downlink subframe.
- the present invention provides a method for acquiring 16m subframe allocation information by a 16m terminal in a backward compatible 16m system, including:
- the frame configuration information is obtained from the superframe control header, and the frame configuration information represents or carries a 16m frame start offset, a downlink and uplink subframe ratio of a 16m unit frame, and 16m in a 16m unit frame.
- the downlink sub-frames and other information according to the obtained information and the preset determination manner, determine which downlink subframes in the 16m unit frame are 16m downlink subframes, where the starting subframe of the 16m unit frame is fixed to the 16m downlink subframe.
- the method for acquiring the 16m subframe allocation information by the foregoing 16m terminal may further have the following features:
- the starting offset of the 16m frame is L
- the number of downlink subframes of the 16m unit frame is N
- the number of 16m downlink subframes in the N downlink subframes is M, from the starting position of the 16m unit frame to the downlink to the uplink switching point.
- the number of downlink subframes included in the 16m downlink subframe is determined by the following manner:
- the first M downlink subframes in the 16m unit frame including the start subframe are 16m downlink subframes
- N > M > P except for the first to N-th downlink subframes after the uplink to downlink transition point in the 16m unit frame, the other downlink subframes are 16m downlink subframes.
- the 16m terminal can quickly and easily acquire the allocation information of the 16m downlink subframe.
- FIG. 1 is a schematic diagram showing the structure of a superframe structure proposed in the current 16m frame structure design
- 2 is a schematic diagram of a 16m frame start offset in a backward compatible 16m frame structure
- FIG. 3 is a flowchart of a method for downlink subframe allocation, indication, and terminal acquisition of downlink subframe allocation information in a backward compatible 16m system according to an embodiment of the present invention
- FIG. 4a and FIG. 4b are respectively a 16m frame start offset of 1 and 2, a schematic diagram of allocation of a 16m downlink subframe and a 16e downlink subframe in a backward compatible 16m system unit frame according to an embodiment of the present invention
- 5a to 5d are schematic diagrams showing the distribution of 16m subframes and 16e subframes in four different cases in the embodiment of the present invention.
- the 16m system is used as an example to describe the downlink subframe allocation method of the 16m system.
- the method can also be applied to the non-backward compatible 16m system.
- the process is as shown in FIG. 3, including:
- Step 310 Set a 16m frame start offset in the parameter of the configuration area range, and all 16m base stations in the configuration area range start the 16m unit frame start position according to the 16m frame start offset, and the 16m base station will be 16m.
- the starting subframe of the unit frame is fixedly allocated as a 16m downlink subframe, so that the superframe control header with the synchronization symbol is sent at the beginning of the starting subframe of the first unit frame in the superframe, or
- the sync symbol and the superframe control header are time division multiplexed (TDM) in the first unit frame in the superframe.
- the 16m frame start offset is used as a parameter of the configuration area range (also referred to as deployment wide range), and in the same configuration area range, whether backward compatible or non-backward compatible 16m systems are used.
- the start position of the 16m unit frame is set according to the frame start offset set by the configuration area range, and the first frame starting from the start position, that is, the start subframe is allocated as a 16m downlink subframe.
- a superframe may be started by a synchronization symbol (also referred to as a preamble symbol for synchronization), in order to ensure synchronization symbol alignment between different base stations, one consideration is to superframe control headers containing synchronization symbols.
- the downlink subframe Fixedly placed at the beginning of the last downlink subframe close to the downlink/uplink transition point (the downlink subframe is fixedly allocated as a 16m downlink subframe).
- the 16m system needs to coexist with other TDD systems, for example, the 16m system and the LTE-TDD system and the adjacent frequency of the TD-SCDMA coexist.
- the partial symbol punctures in the subframes or sub-frames close to the downlink/uplink transition point, the synchronization channel, and some system access required information will be greatly affected.
- the starting offset of the 16m frame is in the range of [1, N-2]. , preferably 1 or 2.
- the previous downlink subframe of the downlink/uplink conversion point (downlink to uplink transition point) of the unit frame is not used as the starting subframe, so that the superframe control header is not in the previous downlink of the downlink/uplink transition point.
- N 2
- the 16m frame start offset is 1
- N is determined by the downlink/uplink subframe ratio of the 16m unit frame, which is a parameter of the configuration area range.
- the 16m frame start offset in the range of the configuration area is the same, and is not different due to the different ratios of the 16m downlink subframe and the 16e downlink subframe. Therefore, this embodiment can ensure synchronous transmission of synchronization symbols of different base stations. There may be multiple sync symbols in the superframe, but the spacing between these sync symbols is the same, so just align one of them.
- Step 320 The 16m base station determines a 16m downlink subframe and a 16e downlink subframe in a 16m unit frame according to the configured downlink/downlink subframe ratio (downlink and uplink subframe ratio) and the current requirements of the 16m service and the 16e service. Number (or ratio);
- the number information of the 16m downlink subframe and/or the 16e downlink subframe in the 16m unit frame is used as a parameter of the sector specific.
- the 16m unit frame in each sector is determined.
- the ratio of the 16m downlink subframe and the 16e downlink subframe may be different, and the ratio of the 16m downlink subframe to the 16e downlink subframe in the 16m unit frame of different sectors may be different, and the number in the 16m unit frame of the same sector is the minimum period of the superframe.
- the change is made, that is, the division of the 16m subframe and the 16e subframe may be different in different superframes, and the same sector may adjust the ratio of the 16m subframe and the 16e subframe according to the change of the traffic.
- Step 330 The 16m base station according to the number of 16m downlink subframes and/or 16e downlink subframes in the 16m unit frame, the set 16m frame start offset, and the downlink subframe number of the 16m unit frame, according to a preset allocation manner Each downlink subframe in a 16m unit frame is allocated as a 16m downlink subframe or a 16e downlink subframe;
- the first one after the uplink/downlink transition point (upstream to downlink transition point) in the 16m unit frame The downlink subframe is fixedly allocated as a 16e downlink subframe.
- the 16m downlink subframe and the 16e downlink subframe may be sequentially included, or only included 16m downlink subframe; may include only 16e downlink subframes, or 16e downlink subframes and 16m downlink subframes, or only 16m downlink subframes, from the uplink/downlink transition point to the 16m unit frame start position ( For pure 16m systems).
- the number of 16m downlink subframes may also be equal to the number of downlink subframes in the unit frame, that is, the configuration sector is a pure 16m system.
- 4a and 4b are schematic diagrams of the allocation of the 16m downlink subframe and the 16e downlink subframe in the backward compatible 16m system unit frame, respectively, when the 16m initial offset is 1 and 2, and the downlink/uplink subframe in the unit frame.
- the frame ratio is 5:3.
- the downlink subframe in the unit frame includes a 16m downlink subframe and a 16e downlink subframe.
- the ratio of the 16m downlink subframe to the 16e downlink subframe may be 4:1, 3:2, 2:3, and 1:4. Because some base stations in the same area may belong to a pure 16m system, some base stations belong to a backward compatible 16m system. In this case, the pure 16m system also needs to be consistent with the backward compatible 16m system in the downlink subframe allocation mode, but only its downlink.
- the subframes are all 16m downlink subframes. For convenience of explanation, the figure also lists the downlink subframe allocation of the pure 16m system.
- the 16m frame start offset of the configuration area is 1 subframe
- the frame start offset of the backward compatible 16m system and the pure 16m system in the configuration area is 1 subframe
- the synchronization channel 302 is located at 16m superframe.
- the four downlink subframes from the 16m unit frame start position 301 to the downlink/uplink transition point 303 are 16m downlink subframes;
- the first three downlink subframes between the 301 and the downlink/uplink transition point 303 are 16m downlink subframes, and the last downlink subframe is a 16e downlink subframe.
- the first two downlink subframes from the 16m unit frame start position 301 to the downlink/uplink transition point 303 are 16m downlink subframes, and the last two downlinks.
- the subframe is a 16e downlink subframe;
- the first downlink subframe from the 16m unit frame start position 301 to the downlink/uplink transition point 303 is a 16m downlink subframe, and the last three downlinks.
- the subframe is a 16e downlink subframe.
- the 16m frame start offset of the configuration area is 2 subframes
- the frame start offset of the backward compatible 16m system and the pure 16m system in the configuration area is 2 subframes
- the synchronization channel 310 is located at 16m superframe.
- the three downlink subframes between the 306 and the downlink/uplink transition point 307 are 16m downlink subframes, and the first downlink subframe between the uplink/downlink transition point 308 and the next 16m unit frame start 309 is 16e downlink.
- the subframe, the second downlink subframe is a 16m downlink subframe.
- the three downlink subframes from the 16m unit frame start position 306 to the downlink/uplink transition point 307 are 16m downlink subframes
- the first 2 downlink subframes from the 16m unit frame start position 306 to the downlink/uplink transition point 307 are 16m downlink subframes, and the latter downlink.
- the subframe is a 16e downlink subframe;
- the first downlink subframe from the 16m unit frame start position 306 to the downlink/uplink transition point 307 is a 16m downlink subframe, and the last two downlinks.
- the subframe is a 16e downlink subframe.
- the two downlink subframes between the uplink/downlink transition point 308 and the start of the next 16m frame are 16e downlink. Subframe.
- the above allocation method can be summarized in the following cases. Please refer to the example of FIG. 5a to FIG. 5d.
- the subframes are all 16m downlink subframes.
- N-M 1 16e subframes.
- M-P 1 16m downlink subframe.
- the L subframes from the uplink/downlink transition point 604 to the next 16m unit frame start 601 are 16e downlink subframes.
- the L subframes from the up/down transition point 604 to the next 16m unit frame start 601 are all 16e downlink subframes.
- M ⁇ P the first M downlink subframes including the starting subframe in the 16m unit frame are allocated as
- 16m downlink subframes, and other downlink subframes are allocated as 16e downlink subframes;
- N > M > P the first to the Nth downlink subframes after the uplink to the downlink transition point in the 16m unit frame are all allocated as 16e downlink subframes, and the other downlink subframes are all allocated as 16m downlink subframes;
- Step 340 The 16m base station writes the downlink/uplink subframe ratio of the 16m unit frame, the 16m frame start offset, and the 16m downlink subframe number in the 16m unit frame to the 16m superframe control header, and broadcasts to the 16m terminal.
- the following table is an example of the information related to the downlink subframe allocation indication in the superframe control header of the embodiment.
- the information mainly includes the 3-bit 16m frame start offset information, the 3-bit 16m downlink subframe number information, and the 3-bit Downlink/uplink subframe ratio information and lbit conversion point number information related to the downlink/uplink subframe ratio.
- the number of conversion points is 2.
- Step 350 After the downlink synchronization of the 16m terminal, according to the downlink/uplink subframe ratio, the 16m frame start offset, and the 16m downlink subframe number information in the 16m superframe control header, the judgment corresponding to the preset allocation manner of the 16m base station is performed.
- the method determines which downlink subframes in a 16m unit frame are 16m downlink subframes.
- the 16m terminal is synchronized in the starting subframe of the 16m unit frame containing the synchronization channel, and is set from 16m.
- the corresponding judgment method is as follows:
- the downlink subframe from the 16m unit frame start subframe to the downlink/uplink transition point is a 16m downlink subframe.
- the L subframes from the uplink/downlink transition point to the next 16m unit frame are all 16e downlink subframes;
- the first M consecutive downlink subframes including the start subframe from the 16m unit frame are 16m downlink subframes, and the (PM) downlink subframes before the downlink/uplink transition point are 16e downlink subframes,
- the subframes from the uplink/downlink conversion point to the start of the next 16m unit frame are all 16e subframes.
- the P downlink subframes from the 16m unit frame start subframe to the downlink/uplink transition point are all 16m downlink subframes, and from the uplink/downlink transition point, there are (NM) 16e subframes, After the 16e subframe, there are (MP) 16m downlink subframes before the start of the 16m unit frame.
- the first M downlink subframes in the 16m unit frame including the start subframe are 16m downlink subframes
- all other downlink subframes are 16m downlink subframes;
- all downlink subframes in the 16m unit frame are 16m downlink subframes.
- the foregoing method of the present invention supports the downlink subframe allocation of the backward compatible 16m system, so that different base stations can flexibly configure the proportion of the 16m downlink subframe and the 16e downlink subframe according to service requirements, and ensure different
- the synchronous transmission of the base station synchronization symbols prevents the mutual interference caused by the misalignment of the synchronization symbols.
- the reception of the information required for the synchronization channel and some system access is not caused by the puncture hole. Great impact.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09844532.3A EP2418886A4 (en) | 2009-05-15 | 2009-09-23 | DOWNLINK SUBFRAME DISTRIBUTION, INFORMATION ACQUISITION AND TRANSMISSION METHOD FOR WIMAX EVOLUTION SYSTEM |
US13/257,823 US8792467B2 (en) | 2008-09-27 | 2009-09-23 | Method for downlink sub-frame allocation, information transmission or acquisition in a WiMax evolved system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200910141620.6A CN101686496A (zh) | 2008-09-27 | 2009-05-15 | WiMAX演进系统下行子帧分配、信息传输及获取方法 |
CN200910141620.6 | 2009-05-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010130120A1 true WO2010130120A1 (zh) | 2010-11-18 |
Family
ID=43085789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2009/074140 WO2010130120A1 (zh) | 2008-09-27 | 2009-09-23 | WiMAX演进系统下行子帧分配、信息传输及获取方法 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2418886A4 (zh) |
KR (1) | KR20120016092A (zh) |
WO (1) | WO2010130120A1 (zh) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015109594A1 (zh) * | 2014-01-27 | 2015-07-30 | 华为技术有限公司 | 一种载波数据传输方法,及装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008039027A1 (en) * | 2006-09-28 | 2008-04-03 | Samsung Electronics Co., Ltd. | Method and apparatus for composition of a frame in a communication system |
WO2008049028A1 (en) * | 2006-10-17 | 2008-04-24 | Intel Corporation | Device, system, and method for partitioning and framing communication signals in broadband wireless access networks |
CN101198179A (zh) * | 2007-12-21 | 2008-06-11 | 中兴通讯股份有限公司 | 后向兼容802.16e系统的接入方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009062115A2 (en) * | 2007-11-09 | 2009-05-14 | Zte U.S.A., Inc. | Flexible ofdm/ofdma frame structure for communication systems |
-
2009
- 2009-09-23 WO PCT/CN2009/074140 patent/WO2010130120A1/zh active Application Filing
- 2009-09-23 EP EP09844532.3A patent/EP2418886A4/en not_active Withdrawn
- 2009-09-23 KR KR1020117026803A patent/KR20120016092A/ko not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008039027A1 (en) * | 2006-09-28 | 2008-04-03 | Samsung Electronics Co., Ltd. | Method and apparatus for composition of a frame in a communication system |
WO2008049028A1 (en) * | 2006-10-17 | 2008-04-24 | Intel Corporation | Device, system, and method for partitioning and framing communication signals in broadband wireless access networks |
CN101198179A (zh) * | 2007-12-21 | 2008-06-11 | 中兴通讯股份有限公司 | 后向兼容802.16e系统的接入方法 |
Non-Patent Citations (2)
Title |
---|
"Backward Compatible FDD 802.16m Frame Structure For Full-Duplex and Half-Duplex MS Operations", IEEE 802.16M-08/031R1 BROADBAND WIRELESS ACCESS WORKING GROUP, 10 March 2008 (2008-03-10), XP017729163 * |
See also references of EP2418886A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR20120016092A (ko) | 2012-02-22 |
EP2418886A4 (en) | 2014-08-20 |
EP2418886A1 (en) | 2012-02-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8964689B2 (en) | Method and apparatus for operating multi-band and multi-cell | |
US7813315B2 (en) | Spectrum sharing in a wireless communication network | |
US8638652B2 (en) | Signal transmission with fixed subcarrier spacing within OFDMA communication systems | |
JP4636181B2 (ja) | 異なるシステムを共存させるセルラ通信システム及び方法 | |
US8290067B2 (en) | Spectrum sharing in a wireless communication network | |
JP5731026B2 (ja) | 通信システムのためのフレキシブルなofdm/ofdmaフレーム構造 | |
US8391217B2 (en) | Synchronous spectrum sharing by dedicated networks using OFDM/OFDMA signaling | |
US9635680B2 (en) | Method and apparatus for multiplexing signals having different protocols | |
WO2015180551A1 (zh) | 信息发送方法、信息接收方法、装置及系统 | |
WO2009052752A1 (en) | Transmission method and device in long term evolution time division duplex system | |
EP3267749A1 (en) | Wireless communication system, wireless communication method, wireless lan base station device, and wireless lan terminal device | |
WO2017041748A1 (zh) | 无线通信的方法和装置 | |
WO2009070964A1 (fr) | Procédé et appareil pour déterminer la structure d'une trame radio d'un système duplex à répartition dans le temps | |
KR20080072288A (ko) | 이종망간 서비스 연동 방법 및 시스템 | |
WO2017076351A1 (zh) | 数据传送方法 | |
US8238301B2 (en) | Method, system, and wireless frame structure for supporting different mode of multiple access | |
WO2010051752A1 (zh) | 一种实现多载波聚合传输的方法和装置 | |
WO2009056051A1 (en) | Tdd system signal transmission method and the adoptive frame structure thereof | |
TWI640215B (zh) | 經由錨定載波的小區存取方法和裝置 | |
WO2009049489A1 (fr) | Procédé et dispositif de communication | |
US8792467B2 (en) | Method for downlink sub-frame allocation, information transmission or acquisition in a WiMax evolved system | |
WO2008025274A1 (fr) | Station de base et procédé pour transmettre la signalisation de commande de liaison descendante utilisée par la station de base | |
WO2020063596A1 (zh) | 一种通信方法及装置 | |
WO2009097821A1 (zh) | 一种下行传输的方法和装置 | |
WO2010130120A1 (zh) | WiMAX演进系统下行子帧分配、信息传输及获取方法 |
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: 09844532 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13257823 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20117026803 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2009844532 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |