US20050135327A1 - Dynamic resource allocation in packet data transfer - Google Patents
Dynamic resource allocation in packet data transfer Download PDFInfo
- Publication number
- US20050135327A1 US20050135327A1 US10/814,784 US81478404A US2005135327A1 US 20050135327 A1 US20050135327 A1 US 20050135327A1 US 81478404 A US81478404 A US 81478404A US 2005135327 A1 US2005135327 A1 US 2005135327A1
- Authority
- US
- United States
- Prior art keywords
- slots
- slot
- data
- transmit
- signal level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000012546 transfer Methods 0.000 title description 4
- 238000013468 resource allocation Methods 0.000 title description 2
- 238000005259 measurement Methods 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000010295 mobile communication Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract description 9
- 238000011084 recovery Methods 0.000 abstract 1
- 230000007704 transition Effects 0.000 description 17
- 238000012545 processing Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 11
- 238000002360 preparation method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012552 review Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
-
- 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
-
- 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
Definitions
- This invention relates to multiple access communication systems and in particular it relates to dynamic resource allocation in time division multiple access systems.
- GSM Multiple access wireless systems
- a number of mobile stations communicate with a network.
- the allocation of physical communication channels for use by the mobile stations is fixed.
- a description of the GSM system may be found in The GSM System for Mobile Communications by M. Mouly and M. B. Pautet, published 1992 with the ISBN reference 2-9507190-0-7.
- TDMA Time Division Multiple Access
- GPRS General Packet Radio Systems
- PDCH Packet Data CHannels
- the time division is by frames of 4.615 ms duration and each frame has eight consecutive 0.577 ms slots.
- the slots may be used for uplink or downlink communication.
- Uplink communication is a transmission from the mobile station for reception by the network to which it is attached. Reception by the mobile station of a transmission from the network is described as downlink.
- access to channels can be allocated in response to changes in channel conditions, traffic loading Quality of Service and subscription class. Owing to the continually changing channel conditions and traffic loadings a method for dynamic allocation of the available channels is available.
- the amounts of time that the mobile station receives downlink or transmits uplink may be varied and slots allocated accordingly.
- the sequences of slots allocated for reception and transmission, the so-called multislot pattern is usually described in the form RXTY.
- the allocated receive (R) slots being the number X and the allocated transmit slots (T) the number Y.
- the specification for multislot class 12 is shown in Table 1 below.
- a GPRS system access to a shared channel is controlled by means of an Uplink Status Flag (USF) transmitted on the downlink to each communicating mobile station (MS).
- USF Uplink Status Flag
- MS communicating mobile station
- two allocation methods are defined, which differ in the convention about which uplink slots are made available on receipt of a USF.
- the present invention relates to a particular allocation method, in which an equal number “N” of PDCH's, where a “PDCH” uses a pair of uplink and downlink slots corresponding to each other on a 1-1 basis, are allocated for potential use by the MS.
- the uplink slots available for actual use by a particular mobile station sharing the uplink channel are indicated in the USF.
- the USF is a data item capable of taking 8 values VO-V 7 , and allows uplink resources to be allocated amongst up to 8 mobiles where each mobile recognises one of these 8 values as “valid”, i.e. conferring exclusive use of resources to that mobile.
- reception of a valid USF in the slot 2 of the present frame will indicate the actual availability for transmission of transmit slots 2 . . . N in the next TDMA frame or group of frames, where N is the number of allocated PDCHs.
- transmission takes place in the next transmit frame at transmit slots n, n+1 et seq. to the allocated number of slots (N).
- these allocated slots are always consecutive.
- the mobile station is not able instantly to switch from a receive condition to a transmit condition or vice versa and the time allocated to these reconfigurations is known as turnaround time.
- the turnaround time is a concept including both a time required for switching from a receive condition to a transmit condition, that is, a time required for getting ready to transmit, and a time required for switching from a transmit condition to a receive condition, that is, a time required for getting ready to receive.
- the turnaround time depends upon the class of mobile.
- a turnaround time of one slot is allocated in the case of class 12 mobiles such as are used for the exemplary embodiment described later. It is also necessary for the mobile station, whilst in packet transfer mode, to perform adjacent cell signal level measurements.
- the mobile station has continuously to monitor all Broadcast Control Channel (BCCH) carriers as indicated by the BA(GPRS) list and the BCCH carrier of the serving cell.
- BCCH Broadcast Control Channel
- a received signal level measurement sample is taken in every TDMA frame, on at least one of the BCCH carriers. (3GPP TS 05.08 10.1.1.2) .
- adjacent cell signal level measurements are taken prior to re-configuration from reception to transmission or prior to re-configuration from transmission to reception.
- the number of slots allocated to each combination of these adjacent cell signal level measurements and re-configurations (turnaround) for multislot class 12 is two.
- these combinations are abbreviated as “turnaround (and adjacent cell signal level measurement).”
- FIG. 1 illustrates the GPRS TDMA frame structure showing the numbering convention used for uplink and downlink slots
- FIG. 2 illustrates a 3 slot allocation and a state transition from R 3 T 0 to R 3 T 2 ;
- FIGS. 3 to 5 show 2 PDCH extended dynamic allocations in steady state for R 2 T 0 , R 2 T 1 and R 2 T 2 respectively with associated adjacent cell signal level measurement and turnaround intervals;
- FIG. 6 is a state transition diagram for 2 PDCH extended dynamic allocations
- FIGS. 7 to 11 show the state transitions of FIG. 6 ;
- FIG. 12 to 15 show the 3 PDCH extended dynamic allocation in steady state
- FIG. 16 is a state transition diagram for 3 PDCH extended dynamic allocation
- FIGS. 17 to 25 show the state transitions of FIG. 16 ;
- FIGS. 26 to 30 show the steady state 4 slot extended dynamic allocation of the prior art
- FIGS. 31 to 35 show the steady state 4 slot extended dynamic allocation in accordance with the invention.
- FIG. 36 is a state transition diagram for 4 slot extended dynamic allocation in accordance with the invention.
- FIGS. 37 to 50 show the state transitions of FIG. 36 ;
- FIG. 51 is an exemplary block diagram for illustrating one example of a mobile station which is adaptable to the present embodiment
- FIG. 52 is a flowchart for illustrating an operation example of the slot allocation calculator 128 in FIG. 51 ;
- FIG. 53 is an exemplary block diagram for illustrating one example of a base station which is adaptable to the present embodiment.
- the invention is applied to a GPRS wireless network operating in accordance with the standards applicable to multislot class 12 in extended dynamic allocation.
- FIG. 1 the GPRS TDMA frame structure is illustrated and shows the numbering convention used for uplink and downlink slots. It should be noted that in practice Tx may be advanced relative to Rx due to timing advance in accordance with conventional GSM usage, although this is not shown in the illustration. Thus in practice the amount of time between the first Rx and first Tx of a frame may be reduced by a fraction of a slot from the illustrated value of 3 slots due to timing advance.
- FIG. 1 illustrates two successive TDMA frames with receiver (Rx) and transmitter (Tx) slots identified separately.
- the slot positions within the first frame are shown by the numerals 1 through to 8 with the transmission and reception slots offset by a margin of three slots. This is in accordance with the convention that that the first transmit frame in a TDMA lags the first receive frame by an offset of 3 (thus ordinary single slot GSM can be regarded as a particular case in which only slot 1 of transmit and receive is used).
- T ra 3GPP TS 05.02 6.4.2.2. That is to say that all adjacent cell signal level measurements are taken just before the first receive slot and not before the transmit slot.
- a pair of a receive frame and a transmit frame corresponds to each other on a 1-1 basis with a predetermined offset, where transmission is started from a transmit slot having the same number as that of a receive slot in which a valid USF was received.
- the starting of transmission is done from the next transmission frame of the transmission frame corresponding to the reception frame in which a valid USF is received.
- the number of transmit slots for transmission in a transmit frame equals to the slot numbers allocated to the transmit frame (N), and slots to be transmitted in a transmit frame are always consecutive. The starting position of transmit slots is maintained until the reception of the next valid USF.
- R 3 T 0 indicates receive slots of 3 and transmit slots of 0, while R 3 T 2 indicates receive slots of 3 and transmit slots of 2.
- the starting position of transmit slots in the next transmission frame is Tx slot 2.
- the number of transmit slots to be transmitted is 2, which is the same as the number of the allocated transmitted slots, and these two transmit slots are consecutive.
- FIGS. 3 to 5 show steady state extended dynamic allocations for 2 PDCH according to the annotations and the turnaround (and adjacent cell signal level measurement) intervals are marked.
- consecutive two frames are in the same state because they are in a steady state.
- R 2 T 0 indicates that the number of receive slots is 2 and the number of transmit slots is 0.
- T tb is unnecessary because there is no transmission.
- T ra starts at two slots before the reception of the next frame.
- FIG. 4 illustrates steady state extended dynamic allocation for R 2 T 1 (Rx 2 slots, Tx 1 slot).
- a valid USF 43 received on Rx slot 2 allows one Tx slot on the next uplink frame.
- the starting position of the allowed transmit slot is Tx slot 2, which has the same slot number as the reception position of the valid USF 43 (Rx slot 2) in accordance with the extended dynamic allocation described above.
- FIG. 6 is a state transition diagram for 2 PDCH extended dynamic allocations and shows all of the allowed states. Specifically, as illustrated in FIG. 6 , an aggregate of five state transitions are allowed, including, from R 2 T 0 (Rx 2 slots, Tx 0 slot) to R 2 T 1 (Rx 2 slots, Tx 1 slot), from R 2 T 0 to R 2 T 2 (Rx 2 slots, Tx 2 slots), from R 2 T 1 to R 2 T 0 , from R 2 T 1 to R 2 T 2 , and from R 2 T 2 to R 2 T 0 .
- FIGS. 7 through to 11 show the slot positions and applicable turnaround (and adjacent cell signal level measurement) intervals for the transitions of FIG. 6 .
- FIG. 7 illustrates a state transition from R 2 T 1 to R 2 T 2 .
- the starting position of transmit slots in the next transmission frame is Tx slot 1.
- FIGS. 12 to 15 Steady state 3 PDCH extended dynamic allocations are shown in FIGS. 12 to 15 .
- the state transitions for 3PDCH are shown in FIG. 16 and the corresponding slot positions and turnaround (and adjacent cell signal level measurement) intervals in FIGS. 17 to 25 . It can be seen that for all of the illustrations no impediment to slot allocation arises from the application of the turnaround (and adjacent cell signal level measurement) intervals.
- FIGS. 26 to 30 Examples of allowed and prohibited 4 slot extended dynamic allocations in accordance with the prior art are shown in FIGS. 26 to 30 . These indicate steady states and the four receive slots and no transmit slot R 4 T 0 state of FIG. 26 is allowed. The allocations prohibited are overlaid by a “no entry” logo (e.g. numeral 301 of FIG. 30 ) in the illustrations of FIG. 27 , R 4 T 1 , FIG.
- periods for adjacent cell signal level measurement and turnaround are re-allocated to increase the availability of uplink resources when the uplink resources are otherwise constrained by prescribed allocations.
- T ra is used as the interval accommodating adjacent cell signal level measurement, otherwise if N+T ra +3>8 (condition XX), then T ta is used as the interval accommodating adjacent cell signal level measurement;
- This procedure is implemented in the mobile station which when using the extended dynamic allocation method, and on receiving an allocation of PDCH numbering “N”, must perform the comparison above in order to time the radio link measurement procedure correctly.
- the procedure performed by the network equipment is that when allocating a number of PDCHs “N”, it recognises that when N satisfies the condition (XX) above it must take into account the capability of the mobile station to perform adjacent cell signal level measurements using T ta and provided that:
- the method may be applied successfully to the remaining steady states shown in FIGS. 33, 34 and 35 . Furthermore the method is effective for all of the 4 slot state transitions shown in the state transition diagram FIG. 6 . Illustrations of the 4 slot state transitions are given in FIGS. 37 through to 50 .
- FIG. 51 is a block diagram for a mobile station (MS) which is adaptable to the present embodiment.
- a mobile station (wireless data communication terminal) 100 allows the bi-directional transfer of data between a base station 200 and an external data source and sink 130 .
- the base station 200 transmits GPRS signals to the mobile station 100 .
- the GPRS signals are received on the receive antenna 102 , and are demodulated to baseband ones by a radio frequency demodulator 108 .
- the radio frequency demodulator 108 delivers the baseband signals to a baseband data receiver 106 .
- the baseband data receiver 106 delivers the received baseband data to a demultiplexer 110 .
- the demultiplexer 110 selects either an NCELL measurement unit 112 or a Layer 2 protocol unit 114 to process the above data, depending on its control input from a timing controller 120 .
- the downlink baseband data is destined for the NCELL measurement unit 112 , this unit performs adjacent cell signal level measurement, and transmits the resulting information to a Layer 3 protocol unit 116 .
- the Layer 3 protocol unit 116 in turn transmits the data to the base station 200 via the uplink.
- Downlink baseband data to be used for adjacent cell signal level measurement is routed to the Layer 3 protocol unit 116 .
- the Layer 3 protocol unit 116 separates user plane data and control plane data.
- the user data is sent to a terminal interface unit 118 .
- the terminal interface unit 118 sends the data to an external data source and sink 130 .
- Control plane data is used to perform internal control functions.
- any GPRS slot allocation frames sent from the base station 200 are used to send parameter data to a slot allocation calculator 128 .
- the slot allocation calculator 128 calculates which TDMA slots shall be used for data reception, data transmission, and adjacent cell signal level measurement purposes. This information is sent to a timing controller setting calculator 126 .
- the timing controller setting calculator 126 in turn reconfigures a timing controller 120 so as to perform each operation of receive preparation, transmit preparation, and adjacent cell signal level measurement at the correct time.
- FIG. 52 is a flowchart illustrating an operation example of the slot allocation calculator 128 .
- step S 1000 parameter Tra_flag is set into 1, while parameters Tr and Tt are set to values of Tra[class] and Ttb[class] respectively.
- Tra_flag is a parameter indicating which one of T ra and T ta should be used as the interval accommodating adjacent cell signal level measurement, where the parameter indicates that T ra should be used when set to 1, and that T ta should be used when set to 0.
- Tra[class] and Ttb[class] are values of T ra and Ttb allocated to class (multislot class of a mobile station), which is an input parameter, respectively.
- the number of the class is a property of the mobile station.
- the value of T ra , T tb corresponding to each class is pre-stored in the format of, for example, Table 1.
- parameter Rxmin is set to the value of Tr as set in step S 1000 .
- Rxmin is a parameter indicating the number of the first slot in downlink receive slots.
- step S 1200 the number of transmit slots (Tx) and the number of receive slots (Rx) is compared with each other. As the result of the comparison, if Tx ⁇ Rx (S 1200 : NO), the process goes to step S 1300 , whereas if Tx ⁇ Rx (S 1200 : YES), it moves on to step S 1500 . It is noted that each value of Tx, Rx is included in the radio resource control plane data from the upper layer.
- step S 1300 it is further judged whether Rx+Tt is less than 3 or not.
- “3” is the number of slots for downlink and uplink offset.
- parameter Txmin is set to Tr+3.
- parameter Txmin is set to Tr+Rx+3.
- Txmin is a parameter indicating the number of the first slot in uplink transmit slots. Incidentally, the value set in step S 1000 is used for Tr.
- step S 1600 parameter Txmax is set to Txmin+Tx.
- Txmax is a parameter indicating the number of the next slot of the last slot in uplink transmit slots.
- the value set in step S 1400 or step S 1500 is used for Txmin.
- step S 1700 it is judged whether to end processing or not. Specifically, it is judged whether the processing from step S 1100 through step S 1600 is the first execution or the second execution. As the result of the judgment, if the processing is not ended, that is, if the processing from step S 1100 through step S 1600 is the first execution (S 1700 : NO), the process goes to step S 1800 , whereas if the processing from step S 1100 through step S 1600 is the second execution (S 1700 : YES), a string of processing is ended.
- step S 1800 it is judged whether Txmax set in step S 1600 is less than 8 or not.
- “8” is the number of slots contained in one frame.
- step S 1900 parameter Tra_flag is set into 0, while parameters Tr and Tt are set to values of Trb[class] and Tta[class] respectively, and after that, the process goes to step S 1100 to repeat processing from step S 1100 through step S 1600 .
- Trb[class] and Tta[class] are values of T rb and T ta allocated to class, which is an input parameter, respectively.
- the number of class is included in the radio resource control plane data from the upper layer, and in addition, the value of T rb , T ta corresponding to each class is pre-stored in the format of Table 1. Incidentally, upon completion of the processing from step S 1100 through step S 1600 (S 1700 : YES), the string of processing is ended.
- each value of parameters at the time of the end, Tra_flag, Rxmin, Txmin, and Txmax, is outputted as information.
- T ra As a period accommodating adjacent cell signal level measurement, that is, whether it is possible to use T ra and T tb as a combination of intervals. Specifically, if the number of downlink receive slots (Rx) is greater than the number of uplink transmit slots (Tx) (S 1200 : YES), and if Rx+Tt is equal to or greater than 3 (S 1300 : NO), Txmin is set to Tr+Rx+Tt (S 1500 ), and otherwise, Txmin is set to Tr+3 (S 1400 ). Then, Txmax is set to Txmin+Tx (S 1600 ).
- Txmax is equal to or less than 8 (S 1800 : YES)
- T ra is used as a period accommodating adjacent cell signal level measurement, that is, T ra and T tb is used as a combination of intervals.
- Txmax exceeds 8 (S 1800 : NO)
- T ta is used as a period accommodating adjacent cell signal level measurement, that is, T rb and T ta is used as a combination of intervals.
- step S 1100 through step S 1600 assumes the processing in step S 1100 through step S 1600 to be reexecuted once again after step S 1900
- the invention is not limited to such a case. If any parameters other than Tra_flag (for example, Rxmin, Txmin, Txmax, etc.) are unnecessary as output, that is, if it is just enough to set Tra_flag only, the processing may be ended immediately without repeating any processing from step S 1100 through step S 1600 after step S 1900 .
- Tra_flag for example, Rxmin, Txmin, Txmax, etc.
- User data transmitted from an external data source and sink 130 is accepted by a terminal interface unit 118 , and given to a Layer 3 protocol unit 116 .
- the Layer 3 protocol unit 116 multiplexes the data with any protocol control data, and transmits it via a Layer 2 protocol unit 114 .
- the Layer 2 protocol unit 114 in turn transmits the multiplexed data to a baseband transmitter 124 . Subsequently, the multiplexed data is modulated by a radio frequency modulator 122 , and then is transmitted over a transmit antenna 104 .
- FIG. 53 is a block diagram for a base station which is adaptable to the present embodiment.
- a wireless base station 200 allows the bi-directional transfer of data between a plurality of mobile stations 100 and an external base station controller (BSC: Base Station Controller) 230 .
- BSC Base Station Controller
- Each mobile station 100 transmits precisely-timed GPRS signals to the base station 200 .
- the GPRS signals are received on the receive antenna 202 , and are demodulated to baseband ones by a radio frequency demodulator 208 .
- the radio frequency demodulator 208 delivers the baseband signals to a baseband data receiver 206 . If multiple receive frequencies are used, there is one set of radio frequency demodulator 208 and baseband data receiver 206 per frequency.
- the baseband data receiver 206 delivers the received baseband data to a multiplexer MS 210 .
- the multiplexer MS 210 marks which MS the data has arrived from depending on its control input from a timing controller 220 , and forwards all data to a Layer 2 protocol unit 214 .
- the Layer 2 protocol unit 214 maintains a separate context for each mobile station 100 .
- Downlink baseband data to be used for NCELL measurement is routed to a Layer 3 protocol unit 216 .
- the Layer 3 protocol unit 216 maintains a separate context for each mobile station 100 .
- the Layer 3 protocol unit 216 separates user plane data and radio resource control plane data.
- User data and radio resource control plane data is sent to a BSC interface unit 218 .
- the BSC interface unit 218 sends the data to an external base station controller 230 .
- Radio resource control plane data is used to perform internal control functions.
- a slot allocation calculator 228 calculates, typically according to the data rate required, which GPRS slots are allocated for each mobile station 100 . This information is sent to the Layer 3 protocol unit 216 . The Layer 3 protocol unit 216 sends allocation information to the mobile station 100 . This information is also sent to a timing controller setting calculator 226 .
- other MS slot allocator 232 receives necessary data from the external Base station controller 230 via the BSC interface unit 218 , and calculates allocation information for other mobile stations. This information is also sent to the timing controller setting calculator 226 . The timing controller setting calculator 226 in turn reconfigures a timing controller 220 so as to perform each of receive and transmit actions towards each mobile station 100 at the correct time.
- the timing controller 220 is responsible for determining and controlling the timing of the transmission and reception of signals toward the mobile station 100 . In accordance with the calculation result of the slot allocation calculator 228 , the timing controller 220 controls the precise timing and behaviour of the radio frequency modulator 222 , radio frequency demodulator 208 , baseband data receiver 206 , baseband transmitter 224 , multiplexer MS 210 , and demultiplexer MS 234 .
- User data and control data transmitted from a base station controller 230 is accepted by a BSC interface unit 218 , and given to a Layer 3 protocol unit 216 .
- the Layer 3 protocol unit 216 multiplexes the data with any radio resource control data, and transmits it via a Layer 2 protocol unit 214 .
- the Layer 2 protocol unit 214 in turn transmits the multiplexed data to a demultiplexer MS 234 .
- the demultiplexer MS 234 provides the data for each mobile station 100 on the correct TDMA slot to the correct baseband transmitter 224 .
- the data is modulated by a radio frequency modulator 222 , and then is transmitted over a transmit antenna 204 . If multiple transmit frequencies are used, there is one set of radio frequency modulator 222 and baseband data transmitter 224 per frequency.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
- 1. Field of the Invention
- This invention relates to multiple access communication systems and in particular it relates to dynamic resource allocation in time division multiple access systems.
- 2. Description of Related Art
- In Multiple access wireless systems such as GSM, a number of mobile stations communicate with a network. The allocation of physical communication channels for use by the mobile stations is fixed. A description of the GSM system may be found in The GSM System for Mobile Communications by M. Mouly and M. B. Pautet, published 1992 with the ISBN reference 2-9507190-0-7.
- With the advent of packet data communications over Time Division Multiple Access (TDMA) systems, more flexibility is required in the allocation of resources and in particular in the use of physical communication channels. For packet data transmissions in General Packet Radio Systems (GPRS) a number of Packet Data CHannels (PDCH) provide the physical communication links. The time division is by frames of 4.615 ms duration and each frame has eight consecutive 0.577 ms slots. A description of the GPRS system may be found in (GSM 03.64 V 8.5 release 1999). The slots may be used for uplink or downlink communication. Uplink communication is a transmission from the mobile station for reception by the network to which it is attached. Reception by the mobile station of a transmission from the network is described as downlink.
- In order to utilise most effectively the available bandwidth, access to channels can be allocated in response to changes in channel conditions, traffic loading Quality of Service and subscription class. Owing to the continually changing channel conditions and traffic loadings a method for dynamic allocation of the available channels is available.
- The amounts of time that the mobile station receives downlink or transmits uplink may be varied and slots allocated accordingly. The sequences of slots allocated for reception and transmission, the so-called multislot pattern is usually described in the form RXTY. The allocated receive (R) slots being the number X and the allocated transmit slots (T) the number Y.
- A number of multislot classes, one through to 29, is defined for GPRS operation and the maximum uplink (Tx) and downlink (Rx) slot allocations are specified for each class. The specification for multislot class 12 is shown in Table 1 below.
- In a GPRS system, access to a shared channel is controlled by means of an Uplink Status Flag (USF) transmitted on the downlink to each communicating mobile station (MS). In GPRS two allocation methods are defined, which differ in the convention about which uplink slots are made available on receipt of a USF. The present invention relates to a particular allocation method, in which an equal number “N” of PDCH's, where a “PDCH” uses a pair of uplink and downlink slots corresponding to each other on a 1-1 basis, are allocated for potential use by the MS. The uplink slots available for actual use by a particular mobile station sharing the uplink channel are indicated in the USF. The USF is a data item capable of taking 8 values VO-V7, and allows uplink resources to be allocated amongst up to 8 mobiles where each mobile recognises one of these 8 values as “valid”, i.e. conferring exclusive use of resources to that mobile. In the case of the extended dynamic allocation method, for example, reception of a valid USF in the
slot 2 of the present frame will indicate the actual availability for transmission oftransmit slots 2 . . . N in the next TDMA frame or group of frames, where N is the number of allocated PDCHs. Generally for a valid USF received at receiver slot n, transmission takes place in the next transmit frame at transmit slots n, n+1 et seq. to the allocated number of slots (N). For the extended dynamic allocation method as presently defined these allocated slots are always consecutive. - The mobile station is not able instantly to switch from a receive condition to a transmit condition or vice versa and the time allocated to these reconfigurations is known as turnaround time. The turnaround time is a concept including both a time required for switching from a receive condition to a transmit condition, that is, a time required for getting ready to transmit, and a time required for switching from a transmit condition to a receive condition, that is, a time required for getting ready to receive. As presently defined the turnaround time depends upon the class of mobile. A turnaround time of one slot is allocated in the case of class 12 mobiles such as are used for the exemplary embodiment described later. It is also necessary for the mobile station, whilst in packet transfer mode, to perform adjacent cell signal level measurements. The mobile station has continuously to monitor all Broadcast Control Channel (BCCH) carriers as indicated by the BA(GPRS) list and the BCCH carrier of the serving cell. A received signal level measurement sample is taken in every TDMA frame, on at least one of the BCCH carriers. (3GPP TS 05.08 10.1.1.2) .
- These adjacent cell signal level measurements are taken prior to re-configuration from reception to transmission or prior to re-configuration from transmission to reception. The number of slots allocated to each combination of these adjacent cell signal level measurements and re-configurations (turnaround) for multislot class 12 is two. As the combination of adjacent cell signal level measurement and turnaround, it is noted that there are 4 patterns of combinations as described later, including the (2 patterns of) combinations of adjacent cell signal level measurement and turnaround (getting ready to transmit or getting ready to receive: hereafter referred to as “transmit/receive preparation” in abbreviated terms) and (another 2 patterns of) turnaround (transmit/receive preparation) only. Hereafter, these combinations are abbreviated as “turnaround (and adjacent cell signal level measurement).”
- Arising from the requirement to allocate particular slots for turnaround (and adjacent cell signal level measurement) purposes, some restrictions occur and potential dynamic channel allocations are lost. These restrictions reduce the availability of slots for uplink transmissions; reduce the flow of data and reduce the flexibility of response to changing conditions.
- An exhaustive technical review and wholesale change to the existing prescribed operating conditions might be expected to alleviate the problems associated with dynamic allocation. Whilst this is possible, the considerable difficulties caused by such wholesale change would be generally unwelcome and this resolution of the technical problem is unlikely.
- There is a need therefore to provide a solution to the problems affecting dynamic channel allocation with minimal effect on existing prior art methods.
- It is an object of this invention to reduce the restrictions affecting dynamic channel allocation with minimal effect on the existing prescript.
- In accordance with the invention there is provided a method for controlling packet data transmissions as set out in the attached claims.
- In the case of the present invention, more transmission capacity has been enabled by allowing some transmission patterns that otherwise would not comply with the specified rules while maintaining the conventional use of GSM timing advance and slot allocation.
-
FIG. 1 illustrates the GPRS TDMA frame structure showing the numbering convention used for uplink and downlink slots; -
FIG. 2 illustrates a 3 slot allocation and a state transition from R3T0 to R3T2; - FIGS. 3 to 5
show 2 PDCH extended dynamic allocations in steady state for R2T0, R2T1 and R2T2 respectively with associated adjacent cell signal level measurement and turnaround intervals; -
FIG. 6 is a state transition diagram for 2 PDCH extended dynamic allocations; - FIGS. 7 to 11 show the state transitions of
FIG. 6 ; -
FIG. 12 to 15 show the 3 PDCH extended dynamic allocation in steady state; -
FIG. 16 is a state transition diagram for 3 PDCH extended dynamic allocation; - FIGS. 17 to 25 show the state transitions of
FIG. 16 ; - FIGS. 26 to 30 show the
steady state 4 slot extended dynamic allocation of the prior art; - FIGS. 31 to 35 show the
steady state 4 slot extended dynamic allocation in accordance with the invention; -
FIG. 36 is a state transition diagram for 4 slot extended dynamic allocation in accordance with the invention; - FIGS. 37 to 50 show the state transitions of
FIG. 36 ; -
FIG. 51 is an exemplary block diagram for illustrating one example of a mobile station which is adaptable to the present embodiment; -
FIG. 52 is a flowchart for illustrating an operation example of theslot allocation calculator 128 inFIG. 51 ; and -
FIG. 53 is an exemplary block diagram for illustrating one example of a base station which is adaptable to the present embodiment. - In this embodiment, the invention is applied to a GPRS wireless network operating in accordance with the standards applicable to multislot class 12 in extended dynamic allocation.
- In
FIG. 1 the GPRS TDMA frame structure is illustrated and shows the numbering convention used for uplink and downlink slots. It should be noted that in practice Tx may be advanced relative to Rx due to timing advance in accordance with conventional GSM usage, although this is not shown in the illustration. Thus in practice the amount of time between the first Rx and first Tx of a frame may be reduced by a fraction of a slot from the illustrated value of 3 slots due to timing advance. -
FIG. 1 illustrates two successive TDMA frames with receiver (Rx) and transmitter (Tx) slots identified separately. The slot positions within the first frame are shown by thenumerals 1 through to 8 with the transmission and reception slots offset by a margin of three slots. This is in accordance with the convention that that the first transmit frame in a TDMA lags the first receive frame by an offset of 3 (thus ordinary single slot GSM can be regarded as a particular case in which onlyslot 1 of transmit and receive is used). - The remaining figures (save for the state transition diagrams and block diagrams) conform to the illustration of
FIG. 1 but the slot numbering has been removed for extra clarity. The shaded slots are those allocated for the particular states, and the arrowed inserts,e.g. numerals FIG. 4 , indicate the applicable turnaround (and adjacent cell signal level measurement) intervals and number of slots allocated for these intervals. The hashed slots,e.g. numeral 43 ofFIG. 4 , indicate reception of a valid USF. As mentioned above, constraints are imposed by the need to allow slots for turnaround (and adjacent cell signal level measurement), and the prescript for these in 3GPP TS 05.02 Annex B limits dynamic allocation as shown in table 1 for the example of multislot class 12.TABLE 1 Multislot Maximum number of slots Minimum number of slots class Rx Tx Sum Tta Ttb Tra Trb 12 4 4 5 2 1 2 1 - Tta is the time needed for the MS to perform adjacent cell signal level measurement and get ready to transmit
- Ttb is the time needed for the MS to get ready to transmit
- Tra is the time needed for the MS to perform adjacent cell signal level measurement and get ready to receive
- Trb is the time needed for the MS to get ready to receive
It should be noted that in practice the times Tta and Ttb may be reduced by a fraction of a slot due to timing advance. - A period for extended dynamic allocation including adjacent cell signal level measurement is specified as Tra (3GPP TS 05.02 6.4.2.2). That is to say that all adjacent cell signal level measurements are taken just before the first receive slot and not before the transmit slot.
- If there are m slots allocated for reception and n slots allocated for transmission, then there must be Min(m,n) reception and transmission slots with the same slot number.
- Here, an explanation is given on the extended dynamic allocation method that is the technique on which the present invention is predicated. According to the extended dynamic allocation method, a pair of a receive frame and a transmit frame corresponds to each other on a 1-1 basis with a predetermined offset, where transmission is started from a transmit slot having the same number as that of a receive slot in which a valid USF was received. The starting of transmission is done from the next transmission frame of the transmission frame corresponding to the reception frame in which a valid USF is received. The number of transmit slots for transmission in a transmit frame equals to the slot numbers allocated to the transmit frame (N), and slots to be transmitted in a transmit frame are always consecutive. The starting position of transmit slots is maintained until the reception of the next valid USF.
- For example, with reference to
FIG. 2 , an example of a 3 slot allocation, annotated R3T0→R3T2, is shown with no uplink slot allocated initially. Avalid USF 21 received onRx slot 2 allows 2 TX slots on the next uplink frame. The annotation “→” indicates a change of state. Here, as described above, R3T0 indicates receive slots of 3 and transmit slots of 0, while R3T2 indicates receive slots of 3 and transmit slots of 2. In this case, because avalid USF 21 has been received onRx slot 2 in the R3T0 state, the starting position of transmit slots in the next transmission frame (the R3T2 state after transition) isTx slot 2. At this time, the number of transmit slots to be transmitted is 2, which is the same as the number of the allocated transmitted slots, and these two transmit slots are consecutive. - FIGS. 3 to 5 show steady state extended dynamic allocations for 2 PDCH according to the annotations and the turnaround (and adjacent cell signal level measurement) intervals are marked. For example, in the case of
FIG. 3 allocation, consecutive two frames are in the same state because they are in a steady state. R2T0 indicates that the number of receive slots is 2 and the number of transmit slots is 0. In this case, Ttb is unnecessary because there is no transmission. Tra starts at two slots before the reception of the next frame. -
FIG. 4 illustrates steady state extended dynamic allocation for R2T1 (Rx 2 slots,Tx 1 slot). In this case, avalid USF 43 received onRx slot 2 allows one Tx slot on the next uplink frame. At this time, the starting position of the allowed transmit slot isTx slot 2, which has the same slot number as the reception position of the valid USF 43 (Rx slot 2) in accordance with the extended dynamic allocation described above. -
FIG. 6 is a state transition diagram for 2 PDCH extended dynamic allocations and shows all of the allowed states. Specifically, as illustrated inFIG. 6 , an aggregate of five state transitions are allowed, including, from R2T0 (Rx 2 slots,Tx 0 slot) to R2T1 (Rx 2 slots,Tx 1 slot), from R2T0 to R2T2 (Rx 2 slots,Tx 2 slots), from R2T1 to R2T0, from R2T1 to R2T2, and from R2T2 to R2T0. - FIGS. 7 through to 11 show the slot positions and applicable turnaround (and adjacent cell signal level measurement) intervals for the transitions of
FIG. 6 . - For example,
FIG. 7 illustrates a state transition from R2T1 to R2T2. In this case, because avalid USF 71 has been received onRx slot 1 in the R2T1 state, the starting position of transmit slots in the next transmission frame isTx slot 1. -
Steady state 3 PDCH extended dynamic allocations are shown in FIGS. 12 to 15. The state transitions for 3PDCH are shown inFIG. 16 and the corresponding slot positions and turnaround (and adjacent cell signal level measurement) intervals in FIGS. 17 to 25. It can be seen that for all of the illustrations no impediment to slot allocation arises from the application of the turnaround (and adjacent cell signal level measurement) intervals. - With 4 slot extended dynamic allocations, however conflicts occur and the prescribed conditions do not permit implementation beyond the steady state R4T0 case illustrated in
FIG. 26 . This is because the constraint Tra=2 for accommodating adjacent cell signal level measurement cannot be applied sinceTx slot 4 is always used, leaving only a single slot turnaround (receive preparation) time beforeRx slot 1. Examples of allowed and prohibited 4 slot extended dynamic allocations in accordance with the prior art are shown in FIGS. 26 to 30. These indicate steady states and the four receive slots and no transmit slot R4T0 state ofFIG. 26 is allowed. The allocations prohibited are overlaid by a “no entry” logo (e.g. numeral 301 ofFIG. 30 ) in the illustrations ofFIG. 27 , R4T1,FIG. 28 , R3T2,FIG. 29 R2T3 andFIG. 30 R1T4. It can be seen that these prohibitions arise because of the limitation of just one slot allowed for time Tra for adjacent cell signal level measurement and transmit preparation (the time needed to perform adjacent cell signal level measurement and then prepare for transmission). - In accordance with the invention, periods for adjacent cell signal level measurement and turnaround (transmit/receive preparation) are re-allocated to increase the availability of uplink resources when the uplink resources are otherwise constrained by prescribed allocations.
- Application of the method in accordance with the invention provides for the previously prohibited allocations of FIGS. 27 to 30 to be admitted as shown in FIGS. 32 to 35. If N slots are allocated, and N+Tra+3≦8 (number of slots in a frame), then Tra is used as the interval accommodating adjacent cell signal level measurement, otherwise if N+Tra+3>8 (condition XX), then Tta is used as the interval accommodating adjacent cell signal level measurement;
- where
- ≦less than or equal to
- >greater than
Tta is the time needed to perform adjacent cell signal level measurement and then prepare for transmission. - Application of the method to the steady state R4T1 is shown in
FIG. 32 . - With the number of PDCH's allocated N=4, the adjacent cell signal level measurement and turnaround interval Tra=2, N+Tra+3>8 (4+2+3=9) and therefore Tta is used as the interval accommodating adjacent cell signal level measurement. The impediment to operation shown in
FIG. 27 is therefore removed by application of the method as illustrated inFIG. 32 . - This procedure is implemented in the mobile station which when using the extended dynamic allocation method, and on receiving an allocation of PDCH numbering “N”, must perform the comparison above in order to time the radio link measurement procedure correctly.
- The procedure performed by the network equipment is that when allocating a number of PDCHs “N”, it recognises that when N satisfies the condition (XX) above it must take into account the capability of the mobile station to perform adjacent cell signal level measurements using Tta and provided that:
- N+Trb+3≦8, is capable of allocating such a number of PDCHs.
- The method may be applied successfully to the remaining steady states shown in
FIGS. 33, 34 and 35. Furthermore the method is effective for all of the 4 slot state transitions shown in the state transition diagramFIG. 6 . Illustrations of the 4 slot state transitions are given in FIGS. 37 through to 50. -
FIG. 51 is a block diagram for a mobile station (MS) which is adaptable to the present embodiment. - A mobile station (wireless data communication terminal) 100 allows the bi-directional transfer of data between a
base station 200 and an external data source and sink 130. - Downlink
- The
base station 200 transmits GPRS signals to themobile station 100. The GPRS signals are received on the receiveantenna 102, and are demodulated to baseband ones by aradio frequency demodulator 108. Theradio frequency demodulator 108 delivers the baseband signals to abaseband data receiver 106. Thebaseband data receiver 106 delivers the received baseband data to ademultiplexer 110. Thedemultiplexer 110 selects either anNCELL measurement unit 112 or aLayer 2protocol unit 114 to process the above data, depending on its control input from atiming controller 120. - If the downlink baseband data is destined for the
NCELL measurement unit 112, this unit performs adjacent cell signal level measurement, and transmits the resulting information to aLayer 3protocol unit 116. TheLayer 3protocol unit 116 in turn transmits the data to thebase station 200 via the uplink. - Downlink baseband data to be used for adjacent cell signal level measurement is routed to the
Layer 3protocol unit 116. TheLayer 3protocol unit 116 separates user plane data and control plane data. The user data is sent to aterminal interface unit 118. Theterminal interface unit 118 sends the data to an external data source and sink 130. - Control
- Control plane data is used to perform internal control functions. In particular, any GPRS slot allocation frames sent from the
base station 200 are used to send parameter data to aslot allocation calculator 128. Theslot allocation calculator 128 calculates which TDMA slots shall be used for data reception, data transmission, and adjacent cell signal level measurement purposes. This information is sent to a timingcontroller setting calculator 126. The timingcontroller setting calculator 126 in turn reconfigures atiming controller 120 so as to perform each operation of receive preparation, transmit preparation, and adjacent cell signal level measurement at the correct time. -
FIG. 52 is a flowchart illustrating an operation example of theslot allocation calculator 128. - First, in step S1000, parameter Tra_flag is set into 1, while parameters Tr and Tt are set to values of Tra[class] and Ttb[class] respectively. Herein, Tra_flag is a parameter indicating which one of Tra and Tta should be used as the interval accommodating adjacent cell signal level measurement, where the parameter indicates that Tra should be used when set to 1, and that Tta should be used when set to 0. Tra[class] and Ttb[class] are values of Tra and Ttb allocated to class (multislot class of a mobile station), which is an input parameter, respectively. The number of the class is a property of the mobile station. In addition, the value of Tra, Ttb corresponding to each class is pre-stored in the format of, for example, Table 1.
- Then, at step S1100, parameter Rxmin is set to the value of Tr as set in step S1000. Here, Rxmin is a parameter indicating the number of the first slot in downlink receive slots.
- Then, at step S1200, the number of transmit slots (Tx) and the number of receive slots (Rx) is compared with each other. As the result of the comparison, if Tx≧Rx (S1200: NO), the process goes to step S1300, whereas if Tx<Rx (S1200: YES), it moves on to step S1500. It is noted that each value of Tx, Rx is included in the radio resource control plane data from the upper layer.
- At step S1300, it is further judged whether Rx+Tt is less than 3 or not. Here, “3” is the number of slots for downlink and uplink offset. As the result of the judgment, if Rx+Tt<3 (S1300: YES), the process goes to step S1400, whereas if Rx+Tt≧3 (S1300: NO), it moves on to step S1500.
- At step S1400, parameter Txmin is set to Tr+3. Meanwhile, at step S1500, parameter Txmin is set to Tr+Rx+3. Here, Txmin is a parameter indicating the number of the first slot in uplink transmit slots. Incidentally, the value set in step S1000 is used for Tr.
- Then, at step S1600, parameter Txmax is set to Txmin+Tx. Here, Txmax is a parameter indicating the number of the next slot of the last slot in uplink transmit slots. Incidentally, the value set in step S1400 or step S1500 is used for Txmin.
- Then, in step S1700, it is judged whether to end processing or not. Specifically, it is judged whether the processing from step S1100 through step S1600 is the first execution or the second execution. As the result of the judgment, if the processing is not ended, that is, if the processing from step S1100 through step S1600 is the first execution (S1700: NO), the process goes to step S1800, whereas if the processing from step S1100 through step S1600 is the second execution (S1700: YES), a string of processing is ended.
- At step S1800, it is judged whether Txmax set in step S1600 is less than 8 or not. Here, “8” is the number of slots contained in one frame. As the result of the judgment, if Txmax≦8 (S1800: YES), the string of processing is ended, whereas if Txmax>8 (S1800: NO), the process goes to step S1900.
- In step S1900, parameter Tra_flag is set into 0, while parameters Tr and Tt are set to values of Trb[class] and Tta[class] respectively, and after that, the process goes to step S1100 to repeat processing from step S1100 through step S1600. Herein, Trb[class] and Tta[class] are values of Trb and Tta allocated to class, which is an input parameter, respectively. As described above, the number of class is included in the radio resource control plane data from the upper layer, and in addition, the value of Trb, Tta corresponding to each class is pre-stored in the format of Table 1. Incidentally, upon completion of the processing from step S1100 through step S1600 (S1700: YES), the string of processing is ended.
- Upon the completion of the string of processing as the result of the judgment in step S1800 (S1800: YES) or as the result of the judgment in step S1700 (S1700: YES), each value of parameters at the time of the end, Tra_flag, Rxmin, Txmin, and Txmax, is outputted as information.
- In short, first, it is checked whether it is possible to use Tra as a period accommodating adjacent cell signal level measurement, that is, whether it is possible to use Tra and Ttb as a combination of intervals. Specifically, if the number of downlink receive slots (Rx) is greater than the number of uplink transmit slots (Tx) (S1200: YES), and if Rx+Tt is equal to or greater than 3 (S1300: NO), Txmin is set to Tr+Rx+Tt (S1500), and otherwise, Txmin is set to Tr+3 (S1400). Then, Txmax is set to Txmin+Tx (S1600). Then, if Txmax is equal to or less than 8 (S1800: YES), Tra is used as a period accommodating adjacent cell signal level measurement, that is, Tra and Ttb is used as a combination of intervals. Contrarily, if Txmax exceeds 8 (S1800: NO), Tta is used as a period accommodating adjacent cell signal level measurement, that is, Trb and Tta is used as a combination of intervals.
- It is noted that, though the operation example in
FIG. 52 assumes the processing in step S1100 through step S1600 to be reexecuted once again after step S1900, the invention is not limited to such a case. If any parameters other than Tra_flag (for example, Rxmin, Txmin, Txmax, etc.) are unnecessary as output, that is, if it is just enough to set Tra_flag only, the processing may be ended immediately without repeating any processing from step S1100 through step S1600 after step S1900. - The
timing controller 120 is responsible for determining and controlling the timing of the transmission and reception of signals toward thebase station 200, and the reception of measurement data. In accordance with the calculation result of theslot allocation calculator 128, thetiming controller 120 controls the precise timing and behaviour of theradio frequency modulator 122,radio frequency demodulator 108,baseband data receiver 106,baseband transmitter 124, anddemultiplexer 110. Specifically, it controls each section in such a manner that, if Tra_flag=1, Tra is used as a period accommodating adjacent cell signal level measurement, whereas if Tra_flag=0, Tta is used as a period accommodating adjacent cell signal level measurement. - Uplink
- User data transmitted from an external data source and sink 130 is accepted by a
terminal interface unit 118, and given to aLayer 3protocol unit 116. TheLayer 3protocol unit 116 multiplexes the data with any protocol control data, and transmits it via aLayer 2protocol unit 114. TheLayer 2protocol unit 114 in turn transmits the multiplexed data to abaseband transmitter 124. Subsequently, the multiplexed data is modulated by aradio frequency modulator 122, and then is transmitted over a transmitantenna 104. -
FIG. 53 is a block diagram for a base station which is adaptable to the present embodiment. - A
wireless base station 200 allows the bi-directional transfer of data between a plurality ofmobile stations 100 and an external base station controller (BSC: Base Station Controller) 230. - Up link
- Each
mobile station 100 transmits precisely-timed GPRS signals to thebase station 200. The GPRS signals are received on the receiveantenna 202, and are demodulated to baseband ones by aradio frequency demodulator 208. Theradio frequency demodulator 208 delivers the baseband signals to abaseband data receiver 206. If multiple receive frequencies are used, there is one set ofradio frequency demodulator 208 andbaseband data receiver 206 per frequency. Thebaseband data receiver 206 delivers the received baseband data to amultiplexer MS 210. Themultiplexer MS 210 marks which MS the data has arrived from depending on its control input from atiming controller 220, and forwards all data to aLayer 2protocol unit 214. TheLayer 2protocol unit 214 maintains a separate context for eachmobile station 100. - Downlink baseband data to be used for NCELL measurement is routed to a
Layer 3protocol unit 216. TheLayer 3protocol unit 216 maintains a separate context for eachmobile station 100. TheLayer 3protocol unit 216 separates user plane data and radio resource control plane data. User data and radio resource control plane data is sent to aBSC interface unit 218. TheBSC interface unit 218 sends the data to an externalbase station controller 230. - Control
- Radio resource control plane data is used to perform internal control functions. In particular, a
slot allocation calculator 228 calculates, typically according to the data rate required, which GPRS slots are allocated for eachmobile station 100. This information is sent to theLayer 3protocol unit 216. TheLayer 3protocol unit 216 sends allocation information to themobile station 100. This information is also sent to a timingcontroller setting calculator 226. In addition, otherMS slot allocator 232 receives necessary data from the externalBase station controller 230 via theBSC interface unit 218, and calculates allocation information for other mobile stations. This information is also sent to the timingcontroller setting calculator 226. The timingcontroller setting calculator 226 in turn reconfigures atiming controller 220 so as to perform each of receive and transmit actions towards eachmobile station 100 at the correct time. - The
timing controller 220 is responsible for determining and controlling the timing of the transmission and reception of signals toward themobile station 100. In accordance with the calculation result of theslot allocation calculator 228, thetiming controller 220 controls the precise timing and behaviour of theradio frequency modulator 222,radio frequency demodulator 208,baseband data receiver 206,baseband transmitter 224,multiplexer MS 210, anddemultiplexer MS 234. - Downlink
- User data and control data transmitted from a
base station controller 230 is accepted by aBSC interface unit 218, and given to aLayer 3protocol unit 216. TheLayer 3protocol unit 216 multiplexes the data with any radio resource control data, and transmits it via aLayer 2protocol unit 214. TheLayer 2protocol unit 214 in turn transmits the multiplexed data to ademultiplexer MS 234. Thedemultiplexer MS 234 provides the data for eachmobile station 100 on the correct TDMA slot to thecorrect baseband transmitter 224. Subsequently, the data is modulated by aradio frequency modulator 222, and then is transmitted over a transmitantenna 204. If multiple transmit frequencies are used, there is one set ofradio frequency modulator 222 andbaseband data transmitter 224 per frequency.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0307585A GB2400271B (en) | 2003-04-02 | 2003-04-02 | Dynamic resource allocation in packet data transfer |
GB0307585.0 | 2003-04-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050135327A1 true US20050135327A1 (en) | 2005-06-23 |
Family
ID=9956020
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/787,258 Expired - Lifetime US7020105B2 (en) | 2003-04-02 | 2004-02-27 | Dynamic resource allocation in packet data transfer |
US10/787,242 Abandoned US20040208148A1 (en) | 2003-04-02 | 2004-02-27 | Dynamic resource allocation in packet data transfer |
US10/814,784 Abandoned US20050135327A1 (en) | 2003-04-02 | 2004-04-01 | Dynamic resource allocation in packet data transfer |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/787,258 Expired - Lifetime US7020105B2 (en) | 2003-04-02 | 2004-02-27 | Dynamic resource allocation in packet data transfer |
US10/787,242 Abandoned US20040208148A1 (en) | 2003-04-02 | 2004-02-27 | Dynamic resource allocation in packet data transfer |
Country Status (12)
Country | Link |
---|---|
US (3) | US7020105B2 (en) |
EP (4) | EP1465448A3 (en) |
JP (4) | JP3590055B2 (en) |
KR (3) | KR20050119184A (en) |
CN (3) | CN1799274A (en) |
AT (2) | ATE403357T1 (en) |
BR (3) | BRPI0408579A (en) |
DE (2) | DE602004015403D1 (en) |
DK (1) | DK1465449T3 (en) |
ES (1) | ES2256801T3 (en) |
GB (2) | GB2400280B (en) |
WO (3) | WO2004091116A2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1952650A1 (en) * | 2005-11-07 | 2008-08-06 | Agency for Science, Technology and Research | Method and devices for determining available frequency ranges |
US20100322204A1 (en) * | 2009-04-21 | 2010-12-23 | David Philip Hole | System and method for adjusting monitoring of timeslots during data transmission |
US8441951B2 (en) | 2008-01-30 | 2013-05-14 | Telefonatiebolaget Lm Ericsson (Publ) | Configuration measurement time slots for mobile terminals in a TDD system |
WO2020225161A1 (en) * | 2019-05-03 | 2020-11-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for controlling transmission on preconfigured uplink resources in a wireless communication network |
Families Citing this family (58)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7295509B2 (en) | 2000-09-13 | 2007-11-13 | Qualcomm, Incorporated | Signaling method in an OFDM multiple access system |
US9130810B2 (en) | 2000-09-13 | 2015-09-08 | Qualcomm Incorporated | OFDM communications methods and apparatus |
WO2005006675A2 (en) * | 2003-07-10 | 2005-01-20 | Matsushita Electric Industrial Co., Ltd. | Wireless communication system and communication method |
WO2005052660A1 (en) | 2003-11-28 | 2005-06-09 | Nhk Spring Co., Ltd. | Multi-channel array waveguide diffraction grating type multiplexer/demultiplexer and method of connecting array waveguide with output waveguides |
US9148256B2 (en) | 2004-07-21 | 2015-09-29 | Qualcomm Incorporated | Performance based rank prediction for MIMO design |
US9137822B2 (en) | 2004-07-21 | 2015-09-15 | Qualcomm Incorporated | Efficient signaling over access channel |
US8095141B2 (en) | 2005-03-09 | 2012-01-10 | Qualcomm Incorporated | Use of supplemental assignments |
US9246560B2 (en) | 2005-03-10 | 2016-01-26 | Qualcomm Incorporated | Systems and methods for beamforming and rate control in a multi-input multi-output communication systems |
US9154211B2 (en) | 2005-03-11 | 2015-10-06 | Qualcomm Incorporated | Systems and methods for beamforming feedback in multi antenna communication systems |
US8446892B2 (en) | 2005-03-16 | 2013-05-21 | Qualcomm Incorporated | Channel structures for a quasi-orthogonal multiple-access communication system |
US9143305B2 (en) | 2005-03-17 | 2015-09-22 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
US9461859B2 (en) | 2005-03-17 | 2016-10-04 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
US9520972B2 (en) | 2005-03-17 | 2016-12-13 | Qualcomm Incorporated | Pilot signal transmission for an orthogonal frequency division wireless communication system |
US9184870B2 (en) | 2005-04-01 | 2015-11-10 | Qualcomm Incorporated | Systems and methods for control channel signaling |
US9036538B2 (en) | 2005-04-19 | 2015-05-19 | Qualcomm Incorporated | Frequency hopping design for single carrier FDMA systems |
US9408220B2 (en) | 2005-04-19 | 2016-08-02 | Qualcomm Incorporated | Channel quality reporting for adaptive sectorization |
US8565194B2 (en) | 2005-10-27 | 2013-10-22 | Qualcomm Incorporated | Puncturing signaling channel for a wireless communication system |
US8611284B2 (en) | 2005-05-31 | 2013-12-17 | Qualcomm Incorporated | Use of supplemental assignments to decrement resources |
US8879511B2 (en) | 2005-10-27 | 2014-11-04 | Qualcomm Incorporated | Assignment acknowledgement for a wireless communication system |
US8462859B2 (en) | 2005-06-01 | 2013-06-11 | Qualcomm Incorporated | Sphere decoding apparatus |
US9179319B2 (en) | 2005-06-16 | 2015-11-03 | Qualcomm Incorporated | Adaptive sectorization in cellular systems |
US8599945B2 (en) | 2005-06-16 | 2013-12-03 | Qualcomm Incorporated | Robust rank prediction for a MIMO system |
US8885628B2 (en) | 2005-08-08 | 2014-11-11 | Qualcomm Incorporated | Code division multiplexing in a single-carrier frequency division multiple access system |
US20070041457A1 (en) | 2005-08-22 | 2007-02-22 | Tamer Kadous | Method and apparatus for providing antenna diversity in a wireless communication system |
US9209956B2 (en) | 2005-08-22 | 2015-12-08 | Qualcomm Incorporated | Segment sensitive scheduling |
US8644292B2 (en) | 2005-08-24 | 2014-02-04 | Qualcomm Incorporated | Varied transmission time intervals for wireless communication system |
US9136974B2 (en) | 2005-08-30 | 2015-09-15 | Qualcomm Incorporated | Precoding and SDMA support |
US7640021B2 (en) * | 2005-09-13 | 2009-12-29 | Interdigital Technology Corporation | Method and apparatus for radio resource allocation in a wireless communication system |
US8045512B2 (en) | 2005-10-27 | 2011-10-25 | Qualcomm Incorporated | Scalable frequency band operation in wireless communication systems |
US9210651B2 (en) | 2005-10-27 | 2015-12-08 | Qualcomm Incorporated | Method and apparatus for bootstraping information in a communication system |
US8693405B2 (en) | 2005-10-27 | 2014-04-08 | Qualcomm Incorporated | SDMA resource management |
US8477684B2 (en) | 2005-10-27 | 2013-07-02 | Qualcomm Incorporated | Acknowledgement of control messages in a wireless communication system |
US8582509B2 (en) | 2005-10-27 | 2013-11-12 | Qualcomm Incorporated | Scalable frequency band operation in wireless communication systems |
US9172453B2 (en) | 2005-10-27 | 2015-10-27 | Qualcomm Incorporated | Method and apparatus for pre-coding frequency division duplexing system |
US9144060B2 (en) | 2005-10-27 | 2015-09-22 | Qualcomm Incorporated | Resource allocation for shared signaling channels |
US9225416B2 (en) | 2005-10-27 | 2015-12-29 | Qualcomm Incorporated | Varied signaling channels for a reverse link in a wireless communication system |
US9225488B2 (en) | 2005-10-27 | 2015-12-29 | Qualcomm Incorporated | Shared signaling channel |
US9088384B2 (en) | 2005-10-27 | 2015-07-21 | Qualcomm Incorporated | Pilot symbol transmission in wireless communication systems |
ATE393554T1 (en) * | 2005-11-10 | 2008-05-15 | Research In Motion Ltd | METHOD AND DEVICE FOR CHANNEL ALLOCATION FOR DATA COMMUNICATIONS IN A RADIO COMMUNICATIONS SYSTEM |
US8582548B2 (en) | 2005-11-18 | 2013-11-12 | Qualcomm Incorporated | Frequency division multiple access schemes for wireless communication |
US8831607B2 (en) | 2006-01-05 | 2014-09-09 | Qualcomm Incorporated | Reverse link other sector communication |
ATE403363T1 (en) * | 2006-02-07 | 2008-08-15 | Research In Motion Ltd | COMMUNICATION OF DATA WITH REDUCED TRANSMISSION LATENCY IN A RADIO COMMUNICATIONS SYSTEM WITH TDMA RADIO INTERFACE |
US8179855B2 (en) | 2006-02-07 | 2012-05-15 | Research In Motion Limited | Method, and associated apparatus, for communicating data at reduced transmission latency in radio communication system having slotted interface |
WO2007112761A1 (en) * | 2006-03-31 | 2007-10-11 | Matsushita Electric Industrial Co., Ltd. | Scheduling radio blocks in a multi-carrier tdma mobile communication system |
US8107968B2 (en) * | 2006-12-11 | 2012-01-31 | Nokia Corporation | Radio transmission scheduling according to multiradio control in a radio modem |
GB0702325D0 (en) * | 2007-02-07 | 2007-03-21 | Siemens Ag | Uplink allocation strategies |
JP4909914B2 (en) * | 2008-01-15 | 2012-04-04 | 株式会社日立製作所 | Wireless terminal |
US8233413B2 (en) * | 2008-02-08 | 2012-07-31 | Zte (Usa) Inc. | Dynamic adjustment of downlink/uplink allocation ratio in TDD wireless systems |
WO2010066067A1 (en) * | 2008-12-12 | 2010-06-17 | 上海贝尔阿尔卡特股份有限公司 | Frame aggregating method in mobile communication system |
US9325618B1 (en) * | 2008-12-31 | 2016-04-26 | Qualcomm Incorporated | Dynamic management of shared transmission opportunities |
KR101544150B1 (en) * | 2009-03-26 | 2015-08-12 | 삼성전자주식회사 | Apparatus and method for improving quality of service in wireless communication system |
KR101498066B1 (en) | 2009-04-14 | 2015-03-03 | 엘지전자 주식회사 | Method of transmitting receiving a data in a wireless communication system |
JP5505178B2 (en) * | 2009-11-02 | 2014-05-28 | 日本電気株式会社 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION DEVICE RECEIVER LEVEL DETERMINING METHOD AND PROGRAM |
US9538434B2 (en) * | 2010-04-06 | 2017-01-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and arrangement in a wireless communication system |
DE102010025796B4 (en) * | 2010-07-01 | 2012-07-12 | Infineon Technologies Ag | Method for receiving synchronization signals of a mobile radio network and transceiver for mobile radio signals |
WO2012079604A1 (en) * | 2010-12-15 | 2012-06-21 | Telefonaktiebolaget L M Ericsson (Publ) | Technique for inter-cell interference coordination in a heterogeneous communication network |
JP6171443B2 (en) * | 2013-03-21 | 2017-08-02 | 富士通株式会社 | Data transfer control method, relay device, and data transfer control device |
US20150016349A1 (en) * | 2013-07-11 | 2015-01-15 | Qualcomm Incorporated | Methods and apparatus for enhanced uplink communication |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US30956A (en) * | 1860-12-18 | Operating the valves of steam-engines | ||
US5493563A (en) * | 1993-07-26 | 1996-02-20 | Motorola, Inc. | Method and apparatus for mobile assisted handoff in a communication system |
US5966657A (en) * | 1997-07-24 | 1999-10-12 | Telefonaktiebolaget L M Ericsson (Publ) | Method and system for radio frequency measurement and automatic frequency planning in a cellular radio system |
US6321083B1 (en) * | 1996-10-10 | 2001-11-20 | Nokia Telecommunications Oy | Traffic hot spot locating method |
US6477151B1 (en) * | 1997-11-11 | 2002-11-05 | Nokia Mobile Phones Ltd. | Packet radio telephone services |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI101332B (en) * | 1995-12-18 | 1998-05-29 | Nokia Telecommunications Oy | Discontinuous transmission in a multi-channel high-speed data transmission |
FI104680B (en) * | 1997-01-09 | 2000-04-14 | Nokia Mobile Phones Ltd | Method for analyzing neighbor cell data in a cellular network and mobile station |
FR2764463B1 (en) | 1997-06-10 | 1999-09-24 | Alsthom Cge Alcatel | METHOD FOR ALLOCATING TRANSMISSION CHANNELS TO A MOBILE STATION, IN PARTICULAR IN HALF-DUPLEX MODE, IN A MOBILE TELECOMMUNICATIONS NETWORK, IN PACKET MODE |
US6600758B1 (en) * | 1999-05-28 | 2003-07-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for measuring control carrier signal strength in wireless communications systems employing discontinuous control carrier transmissions |
US6487415B1 (en) * | 1999-07-19 | 2002-11-26 | Lucent Technologies Inc. | Method for initiating call blocking based upon pilot fraction |
US6996083B1 (en) * | 1999-12-10 | 2006-02-07 | Lucent Technologies Inc. | Burst based access and assignment method for providing real-time services |
US7177298B2 (en) * | 2000-01-07 | 2007-02-13 | Gopal Chillariga | Dynamic channel allocation in multiple-access communication systems |
ITMI20010721A1 (en) | 2001-04-04 | 2002-10-04 | Siemens Inf & Comm Networks | METHOD TO OFFER PACKAGE SERVICES ON RADIO RESOURCES SHARED BY MULTIPLE USERS IN A TDD-CDMA SYSTEM |
EP1261227A1 (en) * | 2001-05-21 | 2002-11-27 | Motorola, Inc. | Method and apparatus for increased information transfer in a communication system |
-
2003
- 2003-04-02 GB GB0415066A patent/GB2400280B/en not_active Expired - Fee Related
- 2003-04-02 GB GB0307585A patent/GB2400271B/en not_active Expired - Fee Related
-
2004
- 2004-01-07 DE DE602004015403T patent/DE602004015403D1/en not_active Expired - Lifetime
- 2004-01-07 AT AT05009522T patent/ATE403357T1/en not_active IP Right Cessation
- 2004-01-07 DK DK04000180T patent/DK1465449T3/en active
- 2004-01-07 EP EP04000151A patent/EP1465448A3/en not_active Withdrawn
- 2004-01-07 DE DE602004000274T patent/DE602004000274T2/en not_active Expired - Lifetime
- 2004-01-07 EP EP04000180A patent/EP1465449B1/en not_active Expired - Lifetime
- 2004-01-07 AT AT04000180T patent/ATE314795T1/en not_active IP Right Cessation
- 2004-01-07 EP EP05009522A patent/EP1558051B1/en not_active Expired - Lifetime
- 2004-01-07 ES ES04000180T patent/ES2256801T3/en not_active Expired - Lifetime
- 2004-02-26 CN CNA2004800087669A patent/CN1799274A/en not_active Withdrawn
- 2004-02-26 BR BRPI0408579-5A patent/BRPI0408579A/en not_active Application Discontinuation
- 2004-02-26 BR BRPI0409163-9A patent/BRPI0409163A/en not_active Application Discontinuation
- 2004-02-26 WO PCT/JP2004/002307 patent/WO2004091116A2/en active Application Filing
- 2004-02-26 KR KR1020057018757A patent/KR20050119184A/en not_active Application Discontinuation
- 2004-02-26 WO PCT/JP2004/002308 patent/WO2004091245A2/en active Search and Examination
- 2004-02-26 CN CNA2004800087955A patent/CN1768490A/en active Pending
- 2004-02-26 KR KR1020057018572A patent/KR100730861B1/en not_active IP Right Cessation
- 2004-02-27 US US10/787,258 patent/US7020105B2/en not_active Expired - Lifetime
- 2004-02-27 US US10/787,242 patent/US20040208148A1/en not_active Abandoned
- 2004-03-03 JP JP2004059876A patent/JP3590055B2/en not_active Expired - Fee Related
- 2004-03-03 JP JP2004059871A patent/JP2004312703A/en active Pending
- 2004-03-30 JP JP2004100135A patent/JP2004312728A/en active Pending
- 2004-03-31 WO PCT/JP2004/004649 patent/WO2004091118A2/en active Application Filing
- 2004-03-31 CN CNA2004800091109A patent/CN1768491A/en active Pending
- 2004-03-31 KR KR1020057018780A patent/KR20050114712A/en not_active Application Discontinuation
- 2004-03-31 BR BRPI0409076-4A patent/BRPI0409076A/en not_active Application Discontinuation
- 2004-04-01 US US10/814,784 patent/US20050135327A1/en not_active Abandoned
- 2004-04-02 EP EP04008085A patent/EP1471757A3/en not_active Withdrawn
- 2004-10-14 JP JP2004300724A patent/JP3629032B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US30956A (en) * | 1860-12-18 | Operating the valves of steam-engines | ||
US5493563A (en) * | 1993-07-26 | 1996-02-20 | Motorola, Inc. | Method and apparatus for mobile assisted handoff in a communication system |
US6321083B1 (en) * | 1996-10-10 | 2001-11-20 | Nokia Telecommunications Oy | Traffic hot spot locating method |
US5966657A (en) * | 1997-07-24 | 1999-10-12 | Telefonaktiebolaget L M Ericsson (Publ) | Method and system for radio frequency measurement and automatic frequency planning in a cellular radio system |
US6477151B1 (en) * | 1997-11-11 | 2002-11-05 | Nokia Mobile Phones Ltd. | Packet radio telephone services |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1952650A1 (en) * | 2005-11-07 | 2008-08-06 | Agency for Science, Technology and Research | Method and devices for determining available frequency ranges |
US20090252048A1 (en) * | 2005-11-07 | 2009-10-08 | Agency For Science, Technology And Research | Method and Devices For Determining Available Frequency Ranges |
EP1952650A4 (en) * | 2005-11-07 | 2011-04-06 | Agency Science Tech & Res | Method and devices for determining available frequency ranges |
US8204072B2 (en) | 2005-11-07 | 2012-06-19 | Agency For Science, Technology And Research | Method and devices for determining available frequency ranges |
US8441951B2 (en) | 2008-01-30 | 2013-05-14 | Telefonatiebolaget Lm Ericsson (Publ) | Configuration measurement time slots for mobile terminals in a TDD system |
US20100322204A1 (en) * | 2009-04-21 | 2010-12-23 | David Philip Hole | System and method for adjusting monitoring of timeslots during data transmission |
US8477739B2 (en) * | 2009-04-21 | 2013-07-02 | Research In Motion Limited | System and method for adjusting monitoring of timeslots during data transmission |
WO2020225161A1 (en) * | 2019-05-03 | 2020-11-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for controlling transmission on preconfigured uplink resources in a wireless communication network |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20050135327A1 (en) | Dynamic resource allocation in packet data transfer | |
KR100742446B1 (en) | Extended dynamic resource allocation of packet data transfer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COOPER, DAVID EDWARD;REEL/FRAME:015579/0174 Effective date: 20040421 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: PANASONIC CORPORATION, JAPAN Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;REEL/FRAME:036817/0104 Effective date: 20081001 |
|
AS | Assignment |
Owner name: GRAND MESA, SERIES 57 OF THE ALLIED SECURITY TRUST Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PANASONIC CORPORATION;PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA;PANASONIC SYSTEM NETWORKS CORPORATION;SIGNING DATES FROM 20151202 TO 20151204;REEL/FRAME:037471/0227 |
|
AS | Assignment |
Owner name: INTERTECHNOLOGY GLOBAL LLC, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GRAND MESA, SERIES 57 OF THE ALLIED SECURITY TRUST I;REEL/FRAME:041443/0083 Effective date: 20170201 |
|
AS | Assignment |
Owner name: GRAND MESA, SERIES 57 OF THE ALLIED SECURITY TRUST Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE NAME OF ONE OF THE PREVIOUS ASSIGNORS PREVIOUSLY RECORDED ON REEL 037471 FRAME 0227. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNORS:PANASONIC CORPORATION;PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA;PANASONIC SYSTEM NETWORKS CO., LTD.;SIGNING DATES FROM 20151202 TO 20151204;REEL/FRAME:047015/0263 |
|
AS | Assignment |
Owner name: NITETEK LICENSING LLC,, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INTERTECHNOLOGY GLOBAL LLC;REEL/FRAME:052749/0105 Effective date: 20200514 |