CN101809928A - The method that is used for frequency division duplex system half-duplex and full duplex subscriber station operation - Google Patents
The method that is used for frequency division duplex system half-duplex and full duplex subscriber station operation Download PDFInfo
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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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/16—Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
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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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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- 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
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
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- 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
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
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- 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
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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
- H04L5/0001—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), DMT
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0028—Variable division
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
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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—Signaling for the administration of the divided path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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Abstract
The invention provides a kind of frame structure of novelty, it can be used for time division duplex (TDD) wireless communication technology is evolved to the frequency-division duplex radio communication technology smoothly.A kind of method that is used to set up the time started of uplink frame is provided, and this uplink frame is distributed the time started with respect to the down link vertical shift.In addition, also provide a kind of method of dividing duplex operation allocation of downlink and uplink resource to half-duplex and full range by transmission-time of reception gap and reception-transmitting time gap fully is provided.
Description
Technical field
The present invention relates generally to communication system, more specifically, relate to Frequency Division Duplexing (FDD) (FDD) OFDM and insert (OFDMA) system.
Background technology
Inserting based on the OFDM of IEEE 802.16e/m that (OFDMA) technology and universal mobile telecommunications system-Long Term Evolution (UMTS-LTE) be determined to be is the choice of technology beyond the 3G honeycomb.IEEE 802.163e supports multiple advanced feature, such as extendible bandwidth, based on the subchannelization methods and the multi-antenna technology of distributed and adjacent sub-carrier.IEEE 802.16e also is reflected in several resource control abilities of finding in the 3G system.
The limitation of IEEE 802.16e is that its current TDD that is confined in practice operates, and wherein the unifrequency carrier wave is used for down link and up link, and down link separates in time with up link.The industrial realization of this standard is limited to the time-division multiplex duplex (TDD) of WiMAX Forum defined at present.
Fig. 1 illustrates the tdd frame structure 100 of current IEEE 802.16e.Each frame is divided into downlink subframe 101 and uplink sub-frames 102.Down link 101 frames are from transmission control expense, wherein control expense and comprise leading 111, frame control header (FCH) message 121, downlink map (DL-MAP) message 131 and uplink map (UL-MAP) message 141.
Leading 111 can be used for frame synchronization, channel status assessment, the signal length that is received and Signal to Interference plus Noise Ratio (SINR) assessment.
Frame control header (FCH) message 121, downlink map (DL-MAP) message 131 and uplink map (UL-MAP) message 141 have been described the structure and the composition of frame.
The time slot that is labeled as TTG (send to and receive change gap) 103 and RTG (receive and send change gap) 104 preferably is inserted between downlink subframe 101 and the uplink sub-frames 102 and the ending of each frame, to allow the conversion between transmission and the receiving function.
Frequency Division Duplexing (FDD) (FDD) operation has vital interests for the operator of the paired frequency spectrum with oneself.Yet, when the collaborative support of FDD relates to base station (BS) and mobile radio station (MS) operation, needing a kind of new frame structure definition, it clearly stipulates down link and uplink timing relation.At this, term mobile radio station and subscriber station use interchangeably.
When the definition frame structure, need to consider many factors.First consideration is to make the modification of existing TDD frame structure minimum, so that does not need existing TDD is realized carrying out excessive hardware change.
Second consideration is to support half-duplex FDD (H-FDD) subscriber station operation.Removing duplexer in the subscriber station makes to have low cost terminals and TDD terminal ASIC is evolved to full FDD ability and is more prone to.
The 3rd consideration is to support the mobile radio station of H-FDD and full FDD operation can co-exist in the same sector-carrier.This will guarantee that the investment of operator on the H-FDD terminal is protected owing to terminal becomes complicated more and evolves to full FDD ability.
The 4th consideration is that expense reduces with respect to TDD.Minimum it should be not poorer than the TDD situation.With respect to TDD, also has improved link budget.
The 5th consideration is by idle number of times being minimized maximize the utilization of air interface resource.
Can move to the FDD operation from TDD apace in order to ensure system, allow simpler H-FDD subscriber station to be configured, and OFDMA system and other improvement based on system's competition of other FDD technology that will make based on WiMAX is provided, these abilities are essential.
Suppose synchronous down link and uplink frame structures at the frame structure solution that this problem had proposed in the past, and have many shortcomings, MAP expense such as increasing is grouped into the zone with subscriber station, and this can cause the link budget of some reduction of up link.
Summary of the invention
Illustrative examples of the present invention allows the beginning of uplink frame with respect to the down link vertical shift.In illustrative examples, this skew is with distributing time started (AST) expression.Preferably, AST sends subscriber station (SS) to by base station (BS), and therefore, SS knows the start and end time of down link (DL) and up link (UL) frame.
The present invention also considers to carry out the change gap that sends and send to reception from receiving on the basis of every user rather than system scope.In addition, whether the resource allocation rule carried out after the resource allocation message that receives such as MAP message of utilization of the present invention is required the priority that sends or receive to set up relevant mobile radio station between given period.
Different frame durations (FD) can be supported in the base station, includes but not limited to 2.5 milliseconds (ms), 5 milliseconds and 10 milliseconds of frames.Longer frame duration is reducing to have many benefits aspect expense and the raising link budget, but shorter frame provides the possibility of improving delay.Can dispatch the ul transmissions of H-FDD subscriber station, so that it can receive the control area in the particular downlink, receive the down link data in the same frame, and send on up link according to the constraint change gap subsequently.Yet, it may be noted that, if subscriber station has been lost by chance and has been comprised down link control area leading and/or resource allocation message (MAP under the situation at WiMAX) when sending on up link, then descending chain circuit frame do not obtain corresponding UL frame distribution during, this subscriber station can not receive data.
Full-duplex operation allows for the subscriber station that has this ability.These subscriber stations can use the subscriber station coexistence of H-FDD with other, and share the Radio Resource of being determined by scheduler.Owing to can send simultaneously and receive for the full duplex mobile radio station, therefore, do not need change gap.
No matter the frame duration of being supposed how, preferably, the transmission on the UL can be crossed over complete frame duration.This provides the benefit of link budget, because data burst can transmit on still less subchannel and more signal, thereby improves SINR on the UL.This also allows bigger burst to be scheduled on the subchannel of predetermined quantity, thereby reduces the part of mac header and any Cyclic Redundancy Check expense.For half-duplex FDD operation frame is divided into the covering that the district may cause losing the cell edge user.
By considering following several factor, the BS scheduler can be used in the utilization maximization of the DL of the HFDD SS that can not support that DL-UL operates simultaneously and UL frame, and these factors include, but is not limited to: the known location of UL multichannel access channel (being range channel in 802.16), the CQI that supports the DL operation and ACK/NACK feedback, provide sufficient SSRTG/SSTTG gap to switch between DL and UL distribute in standard DL and UL image duration.In illustrative examples, any gap that produces between continuous DL or UL frame owing to transmit the signal of integer amount in single frame can be minimized by suitably selecting the OFDMA symbol cyclic prefix duration relevant with OFDMA symbol duration.
Can receive the DL data by semiduplex SS, control and transmission UL data, and control and not conflict.In addition, SS can handle the control messages on the DL, and prepares to send on UL.HFDD SS can receive the control of the part of DL frame and data, also sends UL control and data to the part of concurrent UL frame simultaneously.
For the half-duplex FDD among the WiMAX, kept maximum general character with existing WiMAX TDD configuration.In illustrative examples, the duration of AST and uplink allocation transmits via the existing field among the UL-MAP.In selectable illustrative examples, the duration of AST and distribution transmits via UCD/DCD message.These features are guaranteed to be maintained with the compatibility of ASIC design together with the reservation of uplink/downlink frame timing relationship, thereby reduce the time that WiMAX FDD scheme is introduced to the market.
Description of drawings
Fig. 1 describes the OFDMA frame with TDD operation according to prior art.
Fig. 2 describes the FDD frame structure of seeing from the base station angle according to illustrative examples of the present invention.
Fig. 3 describes the FDD frame structure according to the explanation H-FDD subscriber station operation of illustrative examples of the present invention.
Fig. 4 describes the FDD frame structure according to the operation of the explanation H-FDD of illustrative examples of the present invention and full HDD subscriber station, and it is included in receiving the transmission gap and sending to of carrying out on every user base and receives the gap.
Fig. 5 describes according to the explanation of illustrative examples of the present invention FDD frame structure to the resource allocation of the H-FDD subscriber station of operation down link intensive application.
Fig. 6 describes according to the explanation of illustrative examples of the present invention FDD frame structure to the resource allocation of the H-FDD subscriber station of operation up link intensive application.
Embodiment
Fig. 2 to Fig. 6 has described according to illustrative examples of the present invention, more specifically, is applicable to the embodiment based on the system of IEEE 802.16e/WiMAX.Fig. 2 is from base station angle explanation frame structure 200, and Fig. 3 illustrates the H-FDD operation of the frame structure 300 that use is advised; The DL/UL skew is represented with mould FD.
Illustrative examples of the present invention allows the beginning of uplink frame to be offset AST (distributing the time started) with respect to down link.Preferably, AST sends subscriber station (SS) to by the base station, and therefore, SS knows the start and end time of DL and UL frame.In exemplary system embodiment as shown in Figures 2 and 3, AST can suppose any greater than FD but less than the value of 2*FD, and wherein FD represents the big person in the duration of a down link (DL) or up link (UL) frame.In this case, because the cyclophysis of frame, the DL-UL vertical shift meeting of actual observation is the AST to the FD delivery.As long as considered that via the down link of resource allocation control messages (being called MAP message in IEEE 802.16e/WiMAX) and the correlation of uplink resource allocation, this can keep and behavior like the TDD system class.In optional illustrative examples, AST can be not limited to above-mentioned interval, and for example AST can be less than FD or greater than 2*FD.Especially, when processing power increases in time, may reduce the distribution time started in subscriber station, and will allow the DL that is used to specify terminal to postpone to reduce further to the UL resource allocation less than 1 frame.
Fig. 3 and illustrative examples of the present invention shown in Figure 4 also illustrate the change gap that sends and send to reception from receiving, and preferably, it is carried out on every subscriber station rather than system-wide basis.The change gap that is used for a subscriber station can be used for sending data to another subscriber station or receives data from another subscriber station.This guarantees not have invalid because transmission/reception change gap and drawing-in system.
Fig. 5 explanation is to the illustrative examples of down link intensive application that can semiduplex subscriber station.In the illustrative examples of Fig. 5, during the up link control area, subscriber station section at any time is in receiving mode.During the up link control area, preferably, the feedback of down link is sent during the change gap between downlink allocation and the upload control zone by subscriber station.
Fig. 6 explanation is to the illustrative examples of up link intensive application that can semiduplex subscriber station.In this illustrative examples, subscriber station can be in sending mode in any time during the down link control area that is sent by the base station except leading and MAP message.
Except carrying out change gap, preferably, the resource allocation rule is carried out afterwards having received resource allocation message (for example MAP), whether is required the priority that sends or receive so that set up mobile radio station between given period.For example, the base station is broadcast system parameter on DL periodically usually, such as the quantity of the subchannel that will use in the sector.Preferably, these broadcasts (BM) are intended to be used for all subscriber stations, and special priority rule need be to defining by semiduplex subscriber station, to solve the conflict between broadcast reception and the ul transmissions.In illustrative examples, any UL transmission is avoided dispatching in the base station when scheduling BM.This makes all half-duplex MS can access broadcast, although wasted a part of UL transmission bandwidth.
In optional embodiment, the base station is by arriving selected H-FDD SS with the UL transmitting and scheduling as usual, and the UL bandwidth avoids waste.Preferably, selected SS authorizes UL and gives to be scheduled to transmit the overlapping higher priority of BM with UL than any.It is for BS that a kind of SS of being used for recovers owing to transmitting the possible mode that clashes the BM that loses with UL, and desired BM content is embedded in the DL carrying that is transferred to SS as user traffic flow.Otherwise SS will have to receive BM at a chance place of broadcast reception chance next time, some extra delay that this will cause BM to upgrade.The BS scheduler can guarantee not take place too many BM and UL distribution conflict, even but above-mentioned priority rule has conflict also to allow operation.
The invention provides many benefits, particularly for based on the OFDMA system of IEEE 802.16e/WiMAX and will be based on the WiMAX of future generation system of IEEE 802.16m standard.The example of benefit comprises with the similar resource allocation overhead of smooth evolution, class and TDD of the compatibility of existing TDD frame structure, full FDD with respect to other FDD scheme (converting more high power capacity to) reduced overhead, improved link budget be converted to the head/tail overhead part of the minimizing of coverage raising.
Another benefit of the present invention is the compatibility with TDD configuration and existing hardware scheme, thereby greatly reduces the time that the FDD scheme is introduced to the market.In addition, under the situation of 5 milliseconds of frame durations of supposition, the present invention provides the minimizing of 2x with respect to what proposed such as the possibility of 2.5 milliseconds of DL/UL frames in the standing part of MAP expense.Under the situation of supposition burst of scheduling equal number in a frame duration, the changing unit of MAP expense also reduces by 2 factor.The present invention also provides the improved uplink budget with respect to TDD.
In addition, illustrative examples of the present invention provides the support to different frame duration (for example 2.5 milliseconds, 5 milliseconds and 10 milliseconds of frames).Shown in the illustrative examples among Fig. 4, ul transmissions that can semiduplex subscriber station can be scheduled, so that this subscriber station can receive the control area in the particular downlink, receives the down link data in the same frame, and transmits on up link subsequently.This describes mobile radio station 1 (MS1), mobile radio station 3 (MS3) and mobile radio station 4 (MS4) in Fig. 4.Yet, it may be noted that subscriber station has been lost by chance and comprise down link control area leading and/or resource allocation message (being MAP) in WiMAX if when transmitting on up link, this subscriber station can not receive data image duration at this down link.
Illustrative examples explanation mobile radio station 1 (MS1) shown in Figure 4 is lost the DL control area and therefore can not be scheduled with the situation of receiving downlink data during frame k+1 in frame k+1 owing to the ul transmissions among the frame k.Yet full-duplex operation is permitted for the subscriber station that has this ability.These subscriber stations can with other can H-FDD subscriber station and deposit, and share the Radio Resource of determining by scheduler.Owing to can send simultaneously and receive for the full duplex mobile radio station, therefore, do not need change gap.In addition, in the meantime, other subscriber station that is not scheduled for the UL transmission can be intercepted the DL control messages, and receives the DL transfer of data subsequently.
No matter the frame duration how, preferably, the complete frame period is crossed in the transmission on the UL.This provides the advantage of link budget, because data burst can transmit on still less subchannel and more symbol, thereby improves SINR on the UL.For example, consider burst all available symbols (S in requiring uplink frame
FDD) single subchannel on the situation of dispatching.This situation can need be at S with identical transmission
TDDThe TDD situation of dispatching on the individual symbol is compared, wherein S
FDD＞S
TDDIn this case, surpass the transmission that one subchannel need be used for dispatching TDD.At (S
FDD/ S
TDDUnder the particular case of)=2, the Signal to Interference plus Noise Ratio in the FDD situation (it is identical in both cases that supposition is disturbed) improves 3dB with respect to TDD.Frame is divided into the zone for FDD operation (as in some possibility, proposing) and can causes cell edge user's the losing of covering.
Illustrative examples of the present invention also allows bigger burst to dispatch on the subchannel of predetermined quantity, thereby reduces the part of mac header and any Cyclic Redundancy Check expense.In schematic TDD system embodiment, wherein 15 available symbols be used for uplink data and with 1/2QPSK (Quadrature Phase Shift Keying) speed with the mixed automatic repeat request transmission of using PUSC, the overhead part that is used to cross over the burst of single subchannel is 64/240～27%.Yet for FDD (or H-FDD) operation of using 48 available symbols, overhead part is reduced to 64/ (16*48)～8.3% expense.
For the operation of the FDD among the WiMAX, keep maximum general character with existing WiMAX TDD configuration.Distribute the duration of time started and distribution to transmit via the existing field in the UL-MAP message.The reservation of these features and uplink/downlink frame timing relationship is guaranteed to be maintained with the compatibility of ASIC design, thereby has reduced the time that WiMAX FDD scheme is introduced to the market.
Although the present invention is described with reference to some embodiment, and do not mean that it is limited to above-mentioned explanation, but only limit by the content of stating in the claims.
Claims (10)
1. the method for allocation of downlink and uplink resource, described method comprises:
Determine the down link time started of descending chain circuit frame; And
Determine the up link time started of uplink frame, described up link time started and the skew of described down link time started distribute the time started.
2. the method for allocation of downlink according to claim 1 and uplink resource also comprises: determine the step of time slot, wherein, described time slot comprises the time of switching of mobile radio station requirement between descending chain circuit frame and uplink frame; Described method also comprises: to mobile unit Resources allocation so that described step of distributing the time started greater than described time slot.
3. the method for allocation of downlink according to claim 2 and uplink resource, wherein, determine that the step of time slot comprises: determine the time slot of up link intensive application, described time slot comprises and sends to the reception change gap.
4. the method for allocation of downlink according to claim 2 and uplink resource, wherein, determine that the step of time slot comprises: determine the time slot of down link intensive application, described time slot comprises and receives the transmission change gap.
5. the method for allocation of downlink according to claim 2 and uplink resource wherein, determines that the step of time slot comprises: determine the time slot on the basis of every mobile radio station.
6. the method for allocation of downlink according to claim 1 and uplink resource, described method also comprises: to the step of mobile radio station transmission described distribution time started.
7. the method for allocation of downlink according to claim 1 and uplink resource, wherein, described descending chain circuit frame has the down link duration, and uplink frame has the up link duration; The described distribution time started is greater than the maximum in described down link duration and the described up link duration.
8. the method for allocation of downlink according to claim 7 and uplink resource, wherein, the described distribution time started is less than the peaked twice in described down link duration and the described up link duration.
9. the method for allocation of downlink according to claim 1 and uplink resource, wherein, described method also comprises: to dispatching the step of a series of uplink resource allocation with a plurality of mobile radio stations of base station communication, wherein, described a series of uplink resource allocation makes that described base station can be to whole transmission broadcasts of described a plurality of mobile radio stations.
10. the method for allocation of downlink according to claim 1 and uplink resource wherein, determines that the step of up link time started comprises: utilize the position of known up link control area to determine the up link time started.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US99583607P | 2007-09-27 | 2007-09-27 | |
| US60/995,836 | 2007-09-27 | ||
| US12/217,867 US20100008332A1 (en) | 2008-07-09 | 2008-07-09 | Method for half-and full-duplex subscriber station operation in frequency division duplex systems |
| US12/217,867 | 2008-07-09 | ||
| PCT/US2008/011081 WO2009042158A2 (en) | 2007-09-27 | 2008-09-24 | Method for half-and full-duplex subscriber station operation in frequency division duplex systems |
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| CN101809928A true CN101809928A (en) | 2010-08-18 |
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| CN200880108844A Pending CN101809928A (en) | 2007-09-27 | 2008-09-24 | The method that is used for frequency division duplex system half-duplex and full duplex subscriber station operation |
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| EP (1) | EP2195958A2 (en) |
| JP (1) | JP2010541381A (en) |
| KR (1) | KR20100055495A (en) |
| CN (1) | CN101809928A (en) |
| WO (1) | WO2009042158A2 (en) |
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| CN104205975A (en) * | 2012-03-22 | 2014-12-10 | 夏普株式会社 | Devices for enabling half-duplex communication |
| CN109586884A (en) * | 2011-07-18 | 2019-04-05 | 高通股份有限公司 | For realizing the method for half-duplex and duplex communication coexisted in radio systems |
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| US10172155B2 (en) | 2015-07-29 | 2019-01-01 | Qualcomm Incorporated | Bundling and hybrid automatic repeat request operation for enhanced machine-type communication |
| JPWO2017191809A1 (en) * | 2016-05-02 | 2019-03-28 | 株式会社Ｎｔｔドコモ | User terminal and wireless communication method |
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| CA2488784C (en) * | 2002-06-27 | 2009-12-29 | Nokia Corporation | Scheduling method and apparatus for half-duplex transmission |
| WO2004107605A1 (en) * | 2003-05-27 | 2004-12-09 | Telefonaktiebolaget Lm Ericsson (Publ) | Scheduler and method of scheduling data for communication between a node station and plurality of radio terminals |
| EP1492269B1 (en) * | 2003-06-25 | 2007-02-14 | Siemens S.p.A. | Bandwidth allocation for the uplink of a point-to-multipoint radio system with adaptive coding and modulation of physical channels (adaptive PHY mode) |
| JP4021396B2 (en) * | 2003-09-25 | 2007-12-12 | 株式会社ケンウッド | Mobile communication system, mobile communication method, base station, and mobile device |
| WO2007048478A1 (en) * | 2005-10-26 | 2007-05-03 | Mitsubishi Electric Information Technology Centre Europe B.V. | Method and apparatus for communicating downlink and uplink sub-frames in a half duplex communication system |
-
2008
- 2008-09-24 WO PCT/US2008/011081 patent/WO2009042158A2/en active Application Filing
- 2008-09-24 KR KR1020107006048A patent/KR20100055495A/en not_active Application Discontinuation
- 2008-09-24 CN CN200880108844A patent/CN101809928A/en active Pending
- 2008-09-24 EP EP08834690A patent/EP2195958A2/en not_active Withdrawn
- 2008-09-24 JP JP2010526936A patent/JP2010541381A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103392368A (en) * | 2011-02-18 | 2013-11-13 | 株式会社Ntt都科摩 | Mobile terminal device, base station device, and communication control method |
| CN103392368B (en) * | 2011-02-18 | 2017-05-31 | 株式会社Ntt都科摩 | Mobile terminal apparatus, base station apparatus and communication control method |
| CN109586884A (en) * | 2011-07-18 | 2019-04-05 | 高通股份有限公司 | For realizing the method for half-duplex and duplex communication coexisted in radio systems |
| CN110266456A (en) * | 2011-07-18 | 2019-09-20 | 高通股份有限公司 | For realizing the method for half-duplex and duplex communication coexisted in radio systems |
| CN110266456B (en) * | 2011-07-18 | 2021-09-07 | 高通股份有限公司 | Method for enabling coexistence of half-duplex and duplex communications in a wireless system |
| CN104205975A (en) * | 2012-03-22 | 2014-12-10 | 夏普株式会社 | Devices for enabling half-duplex communication |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009042158A2 (en) | 2009-04-02 |
| KR20100055495A (en) | 2010-05-26 |
| EP2195958A2 (en) | 2010-06-16 |
| WO2009042158A3 (en) | 2009-07-09 |
| JP2010541381A (en) | 2010-12-24 |
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