AU9414998A - Method of allocating transmission channels to mobile station in packet-s witched mode - Google Patents
Method of allocating transmission channels to mobile station in packet-s witched mode Download PDFInfo
- Publication number
- AU9414998A AU9414998A AU94149/98A AU9414998A AU9414998A AU 9414998 A AU9414998 A AU 9414998A AU 94149/98 A AU94149/98 A AU 94149/98A AU 9414998 A AU9414998 A AU 9414998A AU 9414998 A AU9414998 A AU 9414998A
- Authority
- AU
- Australia
- Prior art keywords
- transmit
- mobile station
- control data
- channels
- data
- 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
- 238000000034 method Methods 0.000 title claims description 33
- 230000005540 biological transmission Effects 0.000 title claims description 32
- 238000013475 authorization Methods 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 7
- VJYFKVYYMZPMAB-UHFFFAOYSA-N ethoprophos Chemical compound CCCSP(=O)(OCC)SCCC VJYFKVYYMZPMAB-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/04—Scheduled access
- H04W74/06—Scheduled access using polling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/26—Resource reservation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Small-Scale Networks (AREA)
Description
P/00/008 Section 29(1) Regulation 3.1(2)
AUSTRALIA
Patents Act 1990 NOTICE OF ENTITLEMENT We, ALCATEL of 54 rue La Bo6tie, 75009 Paris, France.
being the applicant in respect of Application No. for an invention entitled "METHOD OF ALLOCATING TRANSMISSION CHANNELS TO MOBILE STATION IN PACKET-SWITCHED MODE" described in the accompanying specification, state the following: The company nominated for the grant of the patent has entitlement from the actual inventor by mesne assignment.
2. The company nominated for the grant of the patent is the applicant of the basic application listed on the patent request form.
3. The basic application listed on the request form is the first application made in a Convention country in respect of the invention.
ALCATEL
25 November 1998 P.M. Conrick P.M. Conrick P/00/01 28/5/91 Regulation 3.2
AUSTRALIA
Patents Act 1990
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT Invention Title: "METHOD OF ALLOCATING TRANSMISSION CHANNELS TO MOBILE STATION IN PACKET-SWITCHED MODE" The following statement is a full description of this invention, including the best method of performing it known to us:- This invention relates to techniques for allocating transmission resources in telecommunications networks.
There are essentially two transmission modes used in telecommunications networks: a transmission mode known as circuit switched mode in which transmission resources are allocated for the duration of a call whether information is transmitted or not, and a transmission mode known as packet switched mode in which the transmission resources allocated can be modified during a call, enabling better 1. 0 sharing of transmission resources between a plurality of calls in accordance with the instantaneous requirements of each call.
Circuit switched mode is more particularly suited to voice communications and packet switched mode is more particularly suited to data transmission. especially in the case of irregular transmission throughputs which are asymmetric in both transmission S16 directions, which is the case in particular when the network is used to transmit data between a telecommunications terminal and a server.
The present invention is more particularly concerned with the use of packet switched mode in mobile radio networks, known as the general packet radio service (GPRS) for mobile radio networks of the Global System for Mobile communications (GSM) type.
AGSM network is a time division multiple access (TDMA) network in which transmission resources comprise time channels (time slots) of frames used to transmit in a downlink direction from the network to the mobile station and in an uplink direction from the mobile station to the network.
The basic unit for transmitting data in packet switched mode in a network of the above kind is a block of data transmitted in time slots of a plurality of consecutive frames.
The channels allocated to a mobile station for transmitting data in packet switched mode in a network of the above kind can change from one block to another during the same call. In the case of the GPRS, the channels allocated to a mobile station for the downlink direction are recognized by the mobile station because the corresponding blocks contain an address allocated to the mobile station. For the uplink direction, the mobile station is informed of the channels that have been allocated to it for a given frame by sending it an authorization to transmit on each of the same channels in the preceding uplink frame, these authorizations being in practice contained in a particular information field of the blocks called the uplink status flag (USF).
Data transmitted by a mobile station in the uplink direction can be either payload data or control data which can in particular consist in responses to control messages transmitted in the downlink direction and especially acknowledgments of payload data transmitted in the downlink direction.
S0 A mobile station receiving payload data is regularly invited by the network to transmit acknowledgments of the data received so that any data that has not been received correctly can be transmitted again, if necessary.
An acknowledgment is transmitted in response to an acknowledgment request contained in a particular information field of the downlink blocks known as the 'IS/PI' 1 t; field.
The USF information field also contains information relating to the mobile stations authorized to transmit data in the uplink direction. When the data transmitted in the uplink direction by the mobile station is payload data, to allow for the limited length of the USF information field and for the fact that acknowledgments do not 2 0, constitute the majority of data transmissions, the information indicates which mobile station is authorized to transmit. When the data transmitted in the uplink direction by the mobile station corresponds to an acknowledgment, the information indicates only that the corresponding channels are reserved for mobile stations to transmit acknowledgments, without indicating which mobile station is authorized to transmit acknowledgments.
For allocating channels for acknowledgments in the uplink direction it is therefore necessary to provide specific means of indicating which channels are allocated and to which mobile station.
A known solution to this problem is to add to an acknowledgment request transmitted by a mobile station in an uplink block, information enabling the channels allocated to the mobile station for acknowledgments to be identified, this information being transmitted in a particular information field known as the relative reserved block frame (RRBF).
A drawback of a solution of the above kind is that locations for transmitting such information must be systematically reserved, leading to poor use of the available transmission resources, since acknowledgments do not constitute the majority of data transmissions.
An object of the present invention is to provide an allocation method that avoids this drawback.
Also known in itself is the provision in the USF information field of an additional information field that is used only for payload data, which field is in addition to a main 0 information field used for payload data and for acknowledgments and containing information relating to the mobile stations authorized to trarismit. If the transmission authorization from the USF field is valid for a set of channels within the same frame the additional information field indicates on which of those channels the mobile station is authorized to transmit payload data.
The present invention exploits the fact that the additional information field, which is present but which is not used in the case of acknowledgments (or more generally in the case of control data), is available for other information, providing a simple and economic solution to the problem stated above.
According to the present invention there is provided a method of allocating transmission channels to a mobile station in a multiple access mobile radio network which multiplexes transmission channels in packet switched mode for transmitting control data in an uplink direction, the channels allocated for transmitting data in the uplink direction being indicated in transmit authorizations received in the downlink direction and said transmit authorizations containing a main information field indicating, when transmitting control data, only the channels reserved for mobile stations to transmit control data without indicating which mobile station is authorized to transmit, and an additional information field used to transmit payload data, wherein said additional information field is also used, when transmitting control data, to indicate which mobile station is authorized to transmit control data and on which of the channels reserved for transmitting control data it is authorized to transmit.
In accordance with a preferred feature of the invention, said additional information field indicates which mobile station is authorized to transmit control data on the reserved channels indicated by the transmit authorization containing the additional data field.
A feature of the above kind is more particularly suited to the situation in which the additional information field is of sufficient length, given the number of mobile stations that can transmit control data.
According to another preferred feature of the invention, the mobile station authorized to transmit control data is indicated, associated with a request to transmit control data addressed to that mobile station, and the channels reserved for transmitting control data which are reserved for that mobile station are indicated by S0 detecting their times of occurrence, which are themselves indicated in said additional information field, with reference to the times of occurrence of the downlink channels containing said request to transmit control data, in said additional information field.
Accordingly a feature of the above kind is more particularly suited to the situation in which the additional information field is of insufficient length, given the i 5 number of mobile stations that can transmit control data.
In order that the invention may be readily carried into effect, embodiments thereof will now be described in relation to the accompanying drawings, in which: Figure 1 is a diagram illustrating the steps of a first embodiment of the method in accordance with the invention, as seen from the mobile station, Figure 2 is a diagram illustrating the steps of a second embodiment of the method in accordance with the invention, as seen from the mobile station, Figure 3 is a diagram illustrating a variant of the method from Figure 2, also applicable to the method from Figure 1, Figure 4 is a block diagram of a mobile station for implementing the allocation method in accordance with the invention, and Figure 5 is a block diagram of a fixed station (base station) of a mobile radio network for implementing the allocation method of the invention.
Thus the present invention concerns a method of allocating transmission channels to a mobile station in a mobile radio network of the multiple access type using transmission channel multiplexing in packet switched mode to transmit control data in an uplink direction, the channels allocated for transmitting data in the uplink direction being indicated in transmit authorizations received in the downlink direction and said transmit authorizations containing a main information field indicating, when transmitting control data, only the channels reserved for mobile stations to transmit control data, without indicating which mobile station is authorized to transmit, and an additional information field used to transmit payload data.
In accordance with the invention, said additional information field is also used, when transmitting control data, to indicate which mobile station is authorized to transmit control data and on which of the channels reserved for transmitting control data it is authorized to transmit.
In a first embodiment of the method said additional information field indicates 0 which of the mobile stations is authorized to transmit control data in the reserved channels indicated by the transmit authorization containing the additional information field.
The first example corresponds more particularly to the method as illustrated in Figure 1.
S1 The method as illustrated in Figure 1 therefore comprises, for each block of data received, and assuming for example that the control data consists of acknowledgments: decoding the main information field of the USF field in the data block (step 1), comparing the value obtained from such decoding to a value V corresponding to channels reserved for acknowledgments by the mobile stations (step 2): if is equal to V, decoding of the additional information field of the USF field in the data block (step 3) and sending of an acknowledgment command on the corresponding channels by the mobile station as indicated after the decoding performed in step 3, and if is not equal to V, repeating the same steps for the next data block received.
In a second embodiment of the method of the invention the mobile station that is authorized to transmit control data is indicated, associated with a request to transmit control data addressed to the mobile station, and the channels reserved for transmitting control data which are reserved for the mobile station are indicated by detecting their times of occurrence, which are themselves indicated in said additional information field, with reference to the times of occurrence of downlink channels containing said request to transmit control data.
The second embodiment corresponds more particularly to the method as illustrated in Figure 2.
The method as illustrated in Figure 2 therefore includes, for each data block received, and for example in the case of control data consisting of acknowledgments: a mobile station decoding an acknowledgment request information field in that block (step A 0 comparing the value "vlI" obtained after such decoding to a value V1 corresponding to an acknowledgment request (step 6), if "vl" is equal to V1: storing in memory the number of the block in which the request was received (step 7) and the current number for each subsequent block received (step S 8): decoding the main information field of the USF field in the block with the current number (step 9), comparing the value obtained after such decoding to the value V reserved for acknowledgments by the mobile stations (step 2- if is equal to V, decoding the additional information field of the USF field in the block with the current number (step 11) and comparing the current value to the value where designates the value obtained after the decoding performed in step 11 (step 12), if is equal to sending an acknowledgment by the mobile station in the corresponding uplink block (step 13), if is not equal to repeating steps 8 through 12 for the next block received, if is not equal to V, repeating steps 8 through 10 for the next block received, if "vl" is not equal to V1, repeating steps 5 through 6 for the next block received.
The variant illustrated in Figure 3 differs from that illustrated in Figure 2 in the following respects: if is not equal to advancing to step 14, if is not equal to V, advancing to step 14, in step 14, if is less than or equal to a maximum number of wait states, repeating steps 8 onwards, and in step 14, if is greater than a maximum number of wait states, abandoning the wait state and returning to step This variant essentially places a time limit on waiting for the authorization to transmit in order to prevent a permanent wait state in the event of a receive error such So that the authorization to transmit is never received. This variant is also applicable to Figure 1, although this is not specifically illustrated.
The Figure 4 diagram illustrates the type of resources used in a mobile station for implementing the allocation method of the invention.
A mobile station of this kind includes: means 21 for receiving transmission channels on downlink frames TD, means 22 for transmitting transmission channels on uplink frames TM, and S means 23 for controlling the transmit and receive means to enable operation in accordance with the method as described.
120 The Figure 5 diagram illustrates the type of resources used in a fixed station (base station) of a mobile radio network for implementing the allocation method of the invention.
A fixed station of the above kind includes: means 24 for transmitting data in transmission channels on said downlink frames TD, means 25 for receiving transmission channels on said uplink frames TM, means 26 for controlling said transmit and receive means to enable operation in accordance with the method as described.
The transmit means (22 or 24) or the receive means (21 or 23) can be conventional means that therefore do not need to be described again here.
The particular implementation of the control means (23 or 26) such that the system operates in accordance with the method as described will not be any particular 8 problem for the skilled person and so will not be described in more detail either.
Claims (8)
1. A method of allocating transmission channels to a mobile station in a multiple access mobile radio network which multiplexes transmission channels in packet switched mode for transmitting control data in an uplink direction, the channels allocated for transmitting data in the uplink direction being indicated in transmit authorizations received in the downlink direction and said transmit authorizations containing a main information field indicating, when transmitting control data, only the channels reserved for mobile stations to transmit control data without indicating which mobile station is authorized to transmit and an additional information field used to transmit payload data, wherein said additional information field is also used, when transmitting control data, to indicate which mobile station is authorized to transmit control data and on which of the channels reserved for transmitting control data it is authorized to transmit.
2. A method as claimed in claim 1, wherein said additional information field I indicates which mobile station is authorized to transmit control data on the reserved channels indicated by the transmit authorization containing the additional data field.
3. A method as claimed in claim 2, wherein the mobile station authorized to transmit control data is indicated, associated with a request to transmit control data addressed to that mobile station, and the channels reserved for transmitting control data which are reserved for that mobile station are indicated by detecting their times of occurrence, which are themselves indicated in said additional information field, with reference to the times of occurrence of the downlink channels containing said request to transmit control data.
4. A mobile station for implementing an allocation method as claimed in any one of claims 1 to 3, including: means for receiving transmission channels on downlink frames, means for transmitting transmission channels on uplink frames, and means for controlling said transmit and receive means to enable operation in accordance with said method.
5. A fixed station for a telecommunications network for implementing the method as claimed in any one of claims 1 to 3, including: means for transmitting data on transmission channels on downlink frames, means for receiving transmission channels on uplink frames, and means for controlling said transmit and receive means to enable operation in accordance with said method.
6. A method substantially as herein described with reference to Figures 1 -5 of the accompanying drawings.
7. A mobile station substantially as herein described with reference to Figures of the accompanying drawings.
8. A fixed station substantially as herein described with reference to Figures 1-5 of I 0 the accompanying drawings. DATED THIS TWENTY FOURTH DAY OF NOVEMBER 1998 ALCATEL
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9715044 | 1997-11-28 | ||
| FR9715044A FR2771885B1 (en) | 1997-11-28 | 1997-11-28 | METHOD FOR ALLOCATING TRANSMISSION CHANNELS TO A MOBILE STATION, IN PACKET MODE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU9414998A true AU9414998A (en) | 1999-06-17 |
Family
ID=9513966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU94149/98A Abandoned AU9414998A (en) | 1997-11-28 | 1998-11-26 | Method of allocating transmission channels to mobile station in packet-s witched mode |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0921662A3 (en) |
| JP (1) | JPH11266477A (en) |
| CN (1) | CN1229327A (en) |
| AU (1) | AU9414998A (en) |
| CA (1) | CA2252990A1 (en) |
| FR (1) | FR2771885B1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100429189B1 (en) * | 1999-08-27 | 2004-04-28 | 엘지전자 주식회사 | Method for assigning common packet channel efficiently |
| EP1107619A3 (en) * | 1999-12-10 | 2002-03-06 | Lucent Technologies Inc. | Multi-polling system for GPRS |
| CA2325612A1 (en) * | 1999-12-10 | 2001-06-10 | Lucent Technologies Inc. | Improvements in and relating to data transmission |
| EP1107620B1 (en) * | 1999-12-10 | 2004-04-14 | Lucent Technologies Inc. | Multi-polling system for GPRS |
| KR100672350B1 (en) * | 2000-02-11 | 2007-01-24 | 엘지전자 주식회사 | Assignment method for common packet channel |
| ATE269616T1 (en) * | 2000-04-25 | 2004-07-15 | Nortel Networks Sa | WIRELESS TELECOMMUNICATIONS SYSTEM WITH REDUCED DATA TRANSMISSION DELAY |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI98426C (en) * | 1994-05-03 | 1997-06-10 | Nokia Mobile Phones Ltd | Systems for transmitting packet data in the air interface within a digital TMDA cellular system |
-
1997
- 1997-11-28 FR FR9715044A patent/FR2771885B1/en not_active Expired - Fee Related
-
1998
- 1998-11-19 EP EP98402866A patent/EP0921662A3/en not_active Withdrawn
- 1998-11-26 AU AU94149/98A patent/AU9414998A/en not_active Abandoned
- 1998-11-27 JP JP10338112A patent/JPH11266477A/en active Pending
- 1998-11-27 CA CA002252990A patent/CA2252990A1/en not_active Abandoned
- 1998-11-27 CN CN98122725.2A patent/CN1229327A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CA2252990A1 (en) | 1999-05-28 |
| FR2771885B1 (en) | 2000-03-24 |
| FR2771885A1 (en) | 1999-06-04 |
| EP0921662A2 (en) | 1999-06-09 |
| CN1229327A (en) | 1999-09-22 |
| EP0921662A3 (en) | 2000-04-05 |
| JPH11266477A (en) | 1999-09-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MK5 | Application lapsed section 142(2)(e) - patent request and compl. specification not accepted |