CN101553034A - Resource distributing method - Google Patents
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- CN101553034A CN101553034A CNA2008100880862A CN200810088086A CN101553034A CN 101553034 A CN101553034 A CN 101553034A CN A2008100880862 A CNA2008100880862 A CN A2008100880862A CN 200810088086 A CN200810088086 A CN 200810088086A CN 101553034 A CN101553034 A CN 101553034A
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Abstract
The invention discloses a resource distributing method which comprises the following steps: resource properties or a plurality of terminals with the same requirement are divided into one group by a base station, a time-frequency resource is distributed to the group, and the resource distributing conditions of the terminals in the group are notified to the terminals by the base station through a control channel. The invention can effectively reduce the system overhead and increase the system performance.
Description
Technical field
The present invention relates to the communications field, relate more specifically to a kind of resource allocation methods.
Background technology
In OFDM code division multiple access (OFDMA) wireless communication system, the base station is to show the equipment that terminal provides service, and the base station communicates by uplink and downlink link and terminal, and the direction of terminal is arrived in the descending base station that is meant, the up direction that is meant terminal to base station.A plurality of terminals can send data by up link to the base station simultaneously, also can receive data simultaneously from the base station by down link.
In the OFDMA wireless communication system, the transmission data resource is formed two-dimentional time-frequency domain resources piece by time-domain symbol and subcarrier in frequency domain respectively.By definition frame time-frequency domain resources is carried out the unified planning scheduling, frame structure successively can be divided into superframe, frame, subframe, the several levels of symbol.
The scheduling of all resources of OFDMA system distributes is carried out the resource situation that can use when resource allocation conditions when for example downlink transfer is carried out in the base station and terminal are carried out uplink etc. usually by the base station.Control channel comprises the control and management message that terminal is realized medium access controls (MAC) function, for example inserts, switches, economize on electricity etc.; On the other hand, control channel has also comprised and need be mapping (MAP) message of terminal indexed resource distribution condition.
In general wireless communication system, all carry out separately the resource allocation management of each terminal the base station.Along with increasing of terminal number in the sub-district, the management of base station and the control messages of scheduling resource also increase thereupon.This makes the management resource of system increase, and system effectiveness is affected.For this reason,, adopt the way of grouping to carry out unified management, can reach efficent use of resources, reduce overhead for the terminal of those same characteristic features or demand.
Summary of the invention
One or more problems in view of the above the invention provides a kind of resource allocation methods, with effective reduction overhead, improve systematic function.
Resource allocation methods according to the embodiment of the invention may further comprise the steps: the base station is divided into a group with attribute or the identical a plurality of terminals of demand, and is described set of dispense running time-frequency resource; And the base station is by control channel (sign map wherein), and the resource allocation conditions of each terminal in described group is notified to each terminal.
Wherein, the base station is the running time-frequency resource of the fixing and fixed-site of described set of dispense size.The base station is provided with according to the resource requirement of terminal in the described group size to control channel.
Wherein, the base station is the running time-frequency resource of described set of dispense size dynamic change and/or position dynamic variation according to current state of affairs and wireless channel environment.The base station is provided with according to the number of the terminal in described group and the resource requirement size to control channel (sign map wherein).It is the size and the positional information of the running time-frequency resource of described set of dispense that each terminal base station is notified by a control messages in the base station.
By the present invention, can effectively reduce the expense of system management messages, improve systematic function.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the resource allocation methods of the embodiment of the invention;
Fig. 2 is the schematic diagram according to the OFDMA frame structure of the embodiment of the invention;
Fig. 3 is the concrete schematic diagram used of a descending static group in the wireless communication system of WiMAXOFDMA technology according to the embodiment of the invention.
Fig. 4 is the concrete schematic diagram used of a up static group in the wireless communication system of WiMAXOFDMA technology according to the embodiment of the invention;
Fig. 5 is the concrete schematic diagram used of a descending dynamic group in the wireless communication system of WiMAXOFDMA technology according to the embodiment of the invention; And
Fig. 6 is the concrete schematic diagram used of a up dynamic group in the wireless communication system of WiMAXOFDMA technology according to the embodiment of the invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
Fig. 1 is the flow chart according to the resource allocation methods of the embodiment of the invention.As shown in Figure 1, this method may further comprise the steps: S102, and the base station is divided into a group with attribute or the identical a plurality of terminals of resource requirement, and is described set of dispense running time-frequency resource; And S104, the base station is by control channel, and the resource allocation conditions of each terminal in described group is notified to each terminal.
Wherein, described component is two kinds: a kind of static group, another kind are dynamic group.
For static group, the base station is that the OFDMA resource block size that group is divided is fixed, and resource area is also fixing.Setting up immediately, the size of static group shared two-dimentional time-frequency domain resources piece in every scheduling frame of OFDMA or subframe, resource area are determined.In the running of group, unless there is specific control messages to change resource size or resource area position, otherwise do not change.MAP message control channel in the static group is used for the concrete condition that user resources are distributed in the indication group in each scheduling.From first basic resources module unit that component is fitted on, MAP message control channel by first frequency domain after time domain arrange in proper order.MAP message control channel size changes according to number of users and changes in demand in the group.
For dynamic group, the base station is that OFDMA resource size and the zone in the time-frequency domain that group is divided is dynamically unfixed.The sign (ID) of this group is only determined in the foundation of group, is not specially this group divide resource.Group is in running, and the group resource can be given dynamically according to state of affairs and wireless channel environment at that time in the base station.The resource allocation region of dynamic group and size are specified by control head message in last layer frame structure (superframe or frame).Control messages in this superframe or the frame is used to size, distribution and the setting of indicating next layer frame structure (frame or subframe) and dividing into groups.Generally can be superframe head (Super-frame Header) message, frame control head (Frame Control Header is called for short FCH) message or based on the control indication (Scheduling-based Control Indication is called for short SCI) of scheduling.MAP message control channel in the dynamic group group is used for the concrete condition that user resources are distributed in the indication group in each scheduling.MAP message control channel size changes according to number of users and changes in demand in the group.
Based on group mode, the user in the group can be divided into static group user and dynamic group user.
For the static group user, the user has been known the position of this group frame and subframe in system when the adding group.The resource of utilization group is in the back carried out in the data transmission procedure, and the user only needs to receive the concrete time-frequency domain position with this group place frame of demodulation or subframe.At first read the MAP message of this static group control channel, judge whether to exist its other resources assignment messages.If then carry out downlink data and receive the perhaps transmission of downlink data according to the indication of this message.If not, then can ignore the distribution of current group of resource.
For the dynamic group user, the user obtains the ID of this group when the adding group, but can not determine the position of this group frame and subframe in system.The user obtains concrete resource distribution location and the size of this group in superframe or frame by receiving and read the indication of control head message in the last layer frame structure (superframe or frame) by this index.Read the MAP message of this dynamic group control channel then, judge whether to exist its other resources assignment messages.If then carry out downlink data and receive the perhaps transmission of downlink data according to the indication of this message.If not, then can ignore the distribution of current group of resource.
Serve as to implement background with WiMAX OFDMA technology below, the present invention is further specified.As shown in Figure 2, WiMAX is the superframe of unit with 20ms, the frame of 5ms length, the subframe of 0.617ms size, and the frame structure that is made of 6 symbols of each subframe.Each superframe all has a superframe head, takies one or more symbols, is used for the broadcast channel and the control channel transmission of superframe.First basic resources module unit from each descending sub frame time-frequency domain has (but not necessarily necessary) subframe MAP control channel.Subframe MAP control channel size changes according to MAP control messages quantity.
As shown in Figure 3, with the descending example that is grouped into, concrete use of static group in the wireless communication system of WiMAX OFDMA technology described.
The base station side process steps is as follows:
The base station is divided into different groups by certain feature requirement.With the superframe is the cycle, and each static group has been planned the position in shared resource size and the superframe when setting up.
The base station is that unit distributes to the group resource with the subframe.The resource requirement of each group all is planned in the middle of one or more subframes fixing in the superframe.The group resource area is not necessarily continuous in the superframe, just may have a plurality of sub-frame resources zone of a group in a superframe.
There is resource allocation MAP in the group in each sub-frame resources zone of group, is made of the DL-MAP control channel of the subframe of this resource area, and the resource area of a plurality of subframe cascades is made of first subframe DL-MAP control channel.Resource allocation MAP is used to refer to group member's resource allocation conditions.The beginning of resource allocation MAP partly has subframe control channel head SCH, is used to refer to the size of MAP control channel, parameters such as modulation coding mode.The base station is by the MAP control channel, and the group member is in this resource area distribution condition in indication.
The base station tells the interior new member of adding of group should organize the distribution locations in superframe, size by user DCD control messages; The number of group resource allocation MAP, relevant parameters such as position.
Terminal use's side step is as follows suddenly:
The user adds a static group.In adition process, the position of this static group of user in superframe told by user DCD control messages in the base station, size, the number of resource control MAP in the group, position, relevant informations such as modulation coding mode.
The information that the user obtains during according to the adding group receives and reads corresponding subframe MAP control channel information in each superframe.The user at first reads the SCH of subframe MAP, determines MAP control channel relevant parameter.Read subframe MAP control messages according to these parameters then.
Whether the user checks in subframe MAP control messages one's own resource allocation IE.If have, then indicate the data message that reads corresponding Resource Block according to IE; If no, then can ignore the interior data of this frame.
As shown in Figure 4, with the up example that is grouped into, concrete use of static group in the wireless communication system that adopts the WiMAXOFDMA technology described.
The base station side process steps is as follows:
The base station is divided into different static group by certain feature requirement.With the superframe is the cycle, and each static group has been planned the position in shared resource size and the superframe when setting up.
The base station is that unit distributes to the group resource with the subframe.The resource requirement of each group all is planned in the middle of one or more subframes fixing in the superframe.The group resource area is not necessarily continuous in the superframe, just may have a plurality of sub-frame resources zone of a group in a superframe.
There is resource allocation MAP in the group in each sub-frame resources zone of group, is made of the UL-MAP control channel of the corresponding subframe of this resource area.Resource allocation MAP is used to refer to group member's resource allocation conditions.The beginning of resource allocation MAP partly has subframe control channel head SCH, is used to refer to the size of MAP control channel, parameters such as modulation coding mode.The base station is by the MAP control channel, and the group member is in this resource area distribution condition in indication.
The base station tells the interior new member of adding of group should organize the distribution locations in superframe, size by user UCD control messages; The number of group resource allocation MAP, relevant parameters such as position.
Terminal use's side step is as follows suddenly:
The user adds a static group.In adition process, the position of this static group of user in superframe told by user UCD control messages in the base station, size, the number of resource control MAP in the group, position, relevant informations such as modulation coding mode.
The information that the user obtains during according to the adding group receives and reads corresponding subframe MAP control channel information in each superframe.The user at first reads the SCH of subframe MAP, determines MAP control channel relevant parameter.Read subframe MAP control messages according to these parameters then.
Whether the user checks in subframe MAP control messages one's own resource allocation IE.If have, then indication sends data message at corresponding Resource Block according to IE; If no, then can ignore the interior data of this frame.
As shown in Figure 5, with the descending example that is grouped into, concrete use of dynamic group in the wireless communication system of WiMAX OFDMA technology described.
The base station side process steps is as follows:
With the superframe is the cycle, and the base station is divided into different dynamic group by certain feature requirement.The ID and the attribute of dynamic group only determined in the base station when setting up dynamic group.In different super frame period, group resource size and position are indefinite.
The base station is that unit distributes to the group resource with the subframe.The base station is to distribute dynamically in the cycle with the superframe for the resource requirement of each group, is planned for then in the superframe in the middle of one or more subframes.The group resource area is not necessarily continuous, just may have a plurality of sub-frame resources zone of a group in a superframe.
Distribution situations such as the resource area subframe position of each dynamic group in this superframe and size are indicated in the base station in the control channel of each superframe head, also indicate resource allocation MAP position in the group of each dynamic group simultaneously.
There is resource allocation MAP in the group in each sub-frame resources zone of group, is made of the DL-MAP control channel of the subframe of this resource area, and the resource area of a plurality of subframe cascades is made of first subframe DL-MAP control channel.Resource allocation MAP is used to refer to group member's resource allocation conditions.The beginning of resource allocation MAP partly has subframe control channel head SCH, is used to refer to the size of MAP control channel, parameters such as modulation coding mode.The base station is by the MAP control channel, and the group member is in this resource area distribution condition in indication.
The base station tells the group member should organize the distribution locations in this superframe, size by superframe head Broadcast Control Channel; The number of group resource allocation MAP, relevant parameters such as position.
Terminal use's side step is as follows suddenly:
The user adds a dynamic group.In adition process, the ID of this dynamic group of user, information such as attribute are told by user DCD control messages in the base station.
The group id information that the user obtains during according to the adding group receives and reads this dynamic group resource area subframe position and size in superframe at each superframe head, information such as resource allocation MAP position in the group of this dynamic group.
The user seeks and reads corresponding subframe MAP control channel information according to the information that obtains from the superframe head.The user at first reads the SCH of subframe MAP, determines MAP control channel relevant parameter.Read subframe MAP control messages according to these parameters then.
Whether the user checks in subframe MAP control messages one's own resource allocation IE.If have, then indicate the data message that reads corresponding Resource Block according to IE; If no, then can ignore the interior data of this frame.
As shown in Figure 6, with the up example that is grouped into, concrete use of dynamic group in the wireless communication system of WiMAX OFDMA technology described.
The base station side process steps is as follows:
With the superframe is the cycle, and the base station is divided into different dynamic group by certain feature requirement.The ID and the attribute of dynamic group only determined in the base station when setting up dynamic group.In different super frame period, group resource size and position are indefinite.
The base station is that unit distributes to the group resource with the subframe.The base station is to distribute dynamically in the cycle with the superframe for the resource requirement of each group, is planned for then in the superframe in the middle of one or more subframes.The group resource area is not necessarily continuous, just may have a plurality of sub-frame resources zone of a group in a superframe.
Distribution situations such as the resource area subframe position of each dynamic group in this superframe and size are indicated in the base station in the control channel of each superframe head, also indicate resource allocation MAP position in the group of each dynamic group simultaneously.
There is resource allocation MAP in the group in each sub-frame resources zone of group, is made of the UL-MAP control channel of the corresponding subframe of this resource area.Resource allocation MAP is used to refer to group member's resource allocation conditions.The beginning of resource allocation MAP partly has subframe control channel head SCH, is used to refer to the size of MAP control channel, parameters such as modulation coding mode.The base station is by the MAP control channel, and the group member is in this resource area distribution condition in indication.
Whether the user checks in subframe MAP control messages one's own resource allocation IE.If have, then indicate the data message that reads corresponding Resource Block according to IE; If no, then can ignore the interior data of this frame.
Terminal use's side step is as follows suddenly:
The user adds a dynamic group.In adition process, the ID of this dynamic group of user, information such as attribute are told by user DCD control messages in the base station.
The group id information that the user obtains during according to the adding group receives and reads this dynamic group resource area subframe position and size in superframe at each superframe head, information such as resource allocation MAP position in the group of this dynamic group.
The user seeks and reads corresponding subframe MAP control channel information according to the information that obtains from the superframe head.The user at first reads the SCH of subframe MAP, determines MAP control channel relevant parameter.Read subframe MAP control messages according to these parameters then.
Whether the user checks in subframe MAP control messages one's own resource allocation IE.If have, then indication sends data message at corresponding Resource Block according to IE; If no, then can ignore the interior data of this frame.
The above is embodiments of the invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within the claim scope of the present invention.
Claims (6)
1. a resource allocation methods is characterized in that, may further comprise the steps:
The base station is divided into a group with attribute or the identical a plurality of terminals of demand, and is described set of dispense running time-frequency resource; And
Described base station is by control channel, and the resource allocation conditions of each the described terminal in described group is notified to each described terminal.
2. resource allocation methods according to claim 1 is characterized in that, described base station is the running time-frequency resource of the fixing and fixed-site of described set of dispense size.
3. resource allocation methods according to claim 2 is characterized in that, described base station is provided with according to the resource requirement of terminal in described group size and the position to described control channel.
4. resource allocation methods according to claim 1 is characterized in that, described base station is the running time-frequency resource of described set of dispense size dynamic change and/or position dynamic variation according to current state of affairs and wireless channel environment.
5. resource allocation methods according to claim 4 is characterized in that, described base station is provided with according to the number of the described terminal in described group and resource requirement size and the position to described control channel.
6. according to each described resource allocation methods in the claim 1 to 5, it is characterized in that it is the size and the positional information of the running time-frequency resource of described set of dispense that each described base station of described terminal is notified by a control messages in described base station.
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| WO2011110034A1 (en) * | 2010-03-10 | 2011-09-15 | 中兴通讯股份有限公司 | Method and system for transmitting resource indication information of broadcast message |
| CN102316068A (en) * | 2011-09-21 | 2012-01-11 | 中兴通讯股份有限公司 | Transmission method for control signalings and system |
| CN102316070A (en) * | 2011-09-21 | 2012-01-11 | 中兴通讯股份有限公司 | Data transmission method and device, and data processing method and device |
| CN102763474A (en) * | 2010-02-23 | 2012-10-31 | Lg电子株式会社 | Group resource allocation method and device in wireless access system |
| CN102860119A (en) * | 2010-04-20 | 2013-01-02 | 松下电器产业株式会社 | Base station, mobile station, coordinated mobile station, transmission method and reception method |
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| CN102684861B (en) * | 2005-09-28 | 2015-03-04 | 桥扬科技有限公司 | Orthogonal frequency division multiple access wireless packet system and base station thereof, mobile equipment and communication method. |
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| CN101193407B (en) * | 2006-11-23 | 2012-07-11 | 华为技术有限公司 | Group resource maintenance method and device and group maintenance information receiving device |
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| CN102763474B (en) * | 2010-02-23 | 2016-06-15 | Lg电子株式会社 | Group resource allocation method in wireless access system and device |
| CN102763474A (en) * | 2010-02-23 | 2012-10-31 | Lg电子株式会社 | Group resource allocation method and device in wireless access system |
| CN102195745A (en) * | 2010-03-10 | 2011-09-21 | 中兴通讯股份有限公司 | Method and system for transmitting resource indication information of broadcast message |
| WO2011110034A1 (en) * | 2010-03-10 | 2011-09-15 | 中兴通讯股份有限公司 | Method and system for transmitting resource indication information of broadcast message |
| CN102195745B (en) * | 2010-03-10 | 2015-06-03 | 中兴通讯股份有限公司 | Method and system for transmitting resource indication information of broadcast message |
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| US9380572B2 (en) | 2010-04-20 | 2016-06-28 | Panasonic Intellectual Property Corporation Of America | Base station, mobile station, coordinated mobile station, transmission method and reception method |
| CN102316070A (en) * | 2011-09-21 | 2012-01-11 | 中兴通讯股份有限公司 | Data transmission method and device, and data processing method and device |
| CN102316068A (en) * | 2011-09-21 | 2012-01-11 | 中兴通讯股份有限公司 | Transmission method for control signalings and system |
| CN105677478A (en) * | 2015-12-30 | 2016-06-15 | 深圳市阿拉互联网金融服务有限公司 | Method and apparatus for resources management |
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