CA2242296C - Method and apparatus for providing packet data service in a communication system - Google Patents
Method and apparatus for providing packet data service in a communication system Download PDFInfo
- Publication number
- CA2242296C CA2242296C CA002242296A CA2242296A CA2242296C CA 2242296 C CA2242296 C CA 2242296C CA 002242296 A CA002242296 A CA 002242296A CA 2242296 A CA2242296 A CA 2242296A CA 2242296 C CA2242296 C CA 2242296C
- Authority
- CA
- Canada
- Prior art keywords
- packet
- traffic channel
- channel
- terminal
- reverse
- 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.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
There is provided a packet data service providing method between a terminal and a base station in a mobile communication system. In the method, packet data is transmitted from the terminal on a reverse channel to the base station during a data transmission period, and the occupation of the reverse terminal is released during a data transmission suspended period. In the method, packet data is transmitted from the base station on a forward channel to the terminal during a data transmission period, and the occupation of the forward terminal is released during a data transmission suspended period.
Description
METHOD AND APPARATUS FOR PROVIDING PACKET DATA SERVICE
IN A COMMUNICATION SYSTEM
BACKGROUND OF THE INVENTION
1. Field of the IllVent~011 The Present ilwention relates to a data commmiication method in a CDMA
{Code Division Multiple Access) communication system, and in Pwticular, to a packet data service Providing method.
IN A COMMUNICATION SYSTEM
BACKGROUND OF THE INVENTION
1. Field of the IllVent~011 The Present ilwention relates to a data commmiication method in a CDMA
{Code Division Multiple Access) communication system, and in Pwticular, to a packet data service Providing method.
2. Description of the Related Art In CDMA of the present communication system and W-CDMA {Wideband-CDMA) considered as a standard for the next generation communication system, a packet data communication is implemented with one-to-one continuous connection established between a terminal and a base station. >3ut it is ideal that the one-to-one com~ection between a terminal and a base station lasts as long as Packet are exchanged and is released during a Packet data communication suspension period, so that the capacity of communication channels is efficiently used and thus communication cost is saved for users.
A conventional Packet data service in a CDMA communication system suffers excessive overheads due to the continuous one-to-one connection state of commwiication channels dwing a Packet data service, thus decreasiyg use efficiency of a channel capacity and imposing increased cost on users.
Moreover;
the demands for data service such as PC (Personal Computer) communication and intemet access and mobile communication-based data service are gradually increasin.~. Most data services are performed in the form. of packet data and data is instantaneous rather than always present. That is, most data communications are packet data communications.
LJnder this circumstance, there is an ever increasing need for enabling more subscribers to access a data service at a low expense by subjecting an interface structure in the conventional CDMA network to a minimum modification.
FIG. 1 is a block diagram of a ternii.nal, a base station, and a radio l.in.k in. a mobile corn~nunication system. The radio link of FIG. .1 is composed of a forward channel for data transmission .from the base station to the terminal anal a reverse channel for data transmission from the ternainal to the base station.
A conventional CDMA mobile communication system has a forward channel structure as shown in FIG. 3 and a reverse channel structure as shown in FIG.
2.
Th.e forward CDMA channel. has a pilot channel, a sync channel, a paging channel, and a forward traffic channel divided into a fundamental channel and a supplemental channel. The reverse CDMA channel includes an access chancel and a reverse traffic channel divided into a fundamental channel and a supplemental channel.
A conventional bidirecti.onal traffic channel has too low a bit rate to provide a packet data service. An approach to ensuring a bit rate high. enough for the packet data service by the conventional bidirectional traffic channel i.s to separate it into a .fundamental channel for affording th.e same .function of the conventional bidirecti.onal tl-affic channel and a supplemental channel for use in. packet data communication.
For a packet data service, a call should be maintained between a base station and a terminal as shown. in FIG. 1 via forward and reverse fundamental channels.
FIG. 4 is a flowchart of using channels for a conventional packet data service.
Refen-in~ to FIG. 4, a basic call i.s set up between a terminal. and a base station using a pilot channel, a sync channel, a paging channel. and au access channel, in step 411. Here, the basic call is bidirectionally perfornied on forward and reverse fundamental channels. In step 412, the base station (terminal) determines whether a request for packet data tran.smi.ssion has been issued from the terminal (base station). In th.e absence of. the packet data tlvansmission request, the procedure jumps to step 41.7 in. which the call is maintained on th.e bidirectional fundamental charnels.
In the presence of th.e packet data transnussion request in step 412, th.e base station (telmilal) notifies the terminal (base station) of use of. a supplemental channel on th.e forward (reverse) fiu~damental channel, in step 413, and the terminal (base station) sends an acknowledge signal to the base station (terminal.) on th.e reverse (forward) fundamental channel, in step 414. In step 415, packet data i.s completely transmitted on bidirectional supplemental chancels. Upon compl.eti.on of the packet data trallsmission/reception, the bidirectional supplemental channels stop their action. in step 416. Then, the call. is maintained on the bidirectional fundamental. channels, in step 417.
A conventional Packet data service in a CDMA communication system suffers excessive overheads due to the continuous one-to-one connection state of commwiication channels dwing a Packet data service, thus decreasiyg use efficiency of a channel capacity and imposing increased cost on users.
Moreover;
the demands for data service such as PC (Personal Computer) communication and intemet access and mobile communication-based data service are gradually increasin.~. Most data services are performed in the form. of packet data and data is instantaneous rather than always present. That is, most data communications are packet data communications.
LJnder this circumstance, there is an ever increasing need for enabling more subscribers to access a data service at a low expense by subjecting an interface structure in the conventional CDMA network to a minimum modification.
FIG. 1 is a block diagram of a ternii.nal, a base station, and a radio l.in.k in. a mobile corn~nunication system. The radio link of FIG. .1 is composed of a forward channel for data transmission .from the base station to the terminal anal a reverse channel for data transmission from the ternainal to the base station.
A conventional CDMA mobile communication system has a forward channel structure as shown in FIG. 3 and a reverse channel structure as shown in FIG.
2.
Th.e forward CDMA channel. has a pilot channel, a sync channel, a paging channel, and a forward traffic channel divided into a fundamental channel and a supplemental channel. The reverse CDMA channel includes an access chancel and a reverse traffic channel divided into a fundamental channel and a supplemental channel.
A conventional bidirecti.onal traffic channel has too low a bit rate to provide a packet data service. An approach to ensuring a bit rate high. enough for the packet data service by the conventional bidirectional traffic channel i.s to separate it into a .fundamental channel for affording th.e same .function of the conventional bidirecti.onal tl-affic channel and a supplemental channel for use in. packet data communication.
For a packet data service, a call should be maintained between a base station and a terminal as shown. in FIG. 1 via forward and reverse fundamental channels.
FIG. 4 is a flowchart of using channels for a conventional packet data service.
Refen-in~ to FIG. 4, a basic call i.s set up between a terminal. and a base station using a pilot channel, a sync channel, a paging channel. and au access channel, in step 411. Here, the basic call is bidirectionally perfornied on forward and reverse fundamental channels. In step 412, the base station (terminal) determines whether a request for packet data tran.smi.ssion has been issued from the terminal (base station). In th.e absence of. the packet data tlvansmission request, the procedure jumps to step 41.7 in. which the call is maintained on th.e bidirectional fundamental charnels.
In the presence of th.e packet data transnussion request in step 412, th.e base station (telmilal) notifies the terminal (base station) of use of. a supplemental channel on th.e forward (reverse) fiu~damental channel, in step 413, and the terminal (base station) sends an acknowledge signal to the base station (terminal.) on th.e reverse (forward) fundamental channel, in step 414. In step 415, packet data i.s completely transmitted on bidirectional supplemental chancels. Upon compl.eti.on of the packet data trallsmission/reception, the bidirectional supplemental channels stop their action. in step 416. Then, the call. is maintained on the bidirectional fundamental. channels, in step 417.
The above call set-up procedure will be reviewed on tile part of the terminal.
A controller of the temninal. obtains information on a corresponding base station via a pilot channel., a sync channel, and a paging chatmel among the .forward channels of the base station. Information for access to the base station is generated by a message processor of the tetmin.al, converted to a signal by a baseband processor, and transmitted to the base station on a reverse access chatmel.
A message processor in. the base station analyses the access information received ii'om the terminal, gets forward and reverse fimdaln.ental channels ready, and seeds to th.e terminal a message indicating that the fundamental. channels are ready on the paging channel. The message processor of. the terminal obtains the fouward fundamental channel, using the bidirectional fundamental channel information received from the base station. Then, the tel-minal sends a signal to the base station on the reverse fundamental channel in order to allow the base station to obtain the reverse fundamental channel. When the base station. succeeds in obtaining the reverse fundamental channel., it notifies the terminal of the fact on the forward fundamental channel. When the base station and the tornainal obtain the bidirectional fundamental channels, the call set-up is completed.
Following the call set-up on the bidirectional fundamental ch.ann.els, the terminal and the base station await packet data transmiss.ion/reception, while exchanging their information on the bidirectional fundamental channels.
Despite the absence of transmit/receive packet data, the call. should be maintained on the bidirectional fundamental channels. Packet data communication after the call set-up is implemented while repeating the procedure shown in FIG. 4.
A controller of the temninal. obtains information on a corresponding base station via a pilot channel., a sync channel, and a paging chatmel among the .forward channels of the base station. Information for access to the base station is generated by a message processor of the tetmin.al, converted to a signal by a baseband processor, and transmitted to the base station on a reverse access chatmel.
A message processor in. the base station analyses the access information received ii'om the terminal, gets forward and reverse fimdaln.ental channels ready, and seeds to th.e terminal a message indicating that the fundamental. channels are ready on the paging channel. The message processor of. the terminal obtains the fouward fundamental channel, using the bidirectional fundamental channel information received from the base station. Then, the tel-minal sends a signal to the base station on the reverse fundamental channel in order to allow the base station to obtain the reverse fundamental channel. When the base station. succeeds in obtaining the reverse fundamental channel., it notifies the terminal of the fact on the forward fundamental channel. When the base station and the tornainal obtain the bidirectional fundamental channels, the call set-up is completed.
Following the call set-up on the bidirectional fundamental ch.ann.els, the terminal and the base station await packet data transmiss.ion/reception, while exchanging their information on the bidirectional fundamental channels.
Despite the absence of transmit/receive packet data, the call. should be maintained on the bidirectional fundamental channels. Packet data communication after the call set-up is implemented while repeating the procedure shown in FIG. 4.
FIG. 5 is a state transition diagram of a terminal on th.e basis of a conventional CDMA standwd. Referring to FIG. 5, when power i.s on in a state 5 1. l, the terminal is set to an initialization state 512. If the tetmin.al synchro~~izes its timing to that of a system in. the i~~i.tiali.zation state 512, it transits to an. idle state 513. The terminal lnay attempt a call, the base station ti~ansnvts informatio~.l of the call attempt to the terminal on a pagiaig channel, and the terminal sends a page response message to the base station, in the idle state 513. Then, the terminal i.s set to a system access state 514. If the terminal fails to obtain a paging channel message or is directed from the base station to a different adjacent base station in a handoff i..n the idle state 513, the terminal. retut.-n.s to the initialization state 51.2.
Here, if. the terminal succeeds ui system. access except for the call attempt or reception. of a call acknowledge signal in the system access state 51.4, the terminal.
retmms to the idle state 513. On the contrary, if th.e terminal succeeds in.
the call attempt or reception of. the call acknowledge signal in the system access state 514, it goes to a traffic channel state 515. The traff:~c channel state 515 lasts as long as traffic is processed. Wlien. traffic channels stop their action, the terminal retw-ns to the initialization state 512.
A communication system should maintaui a call on bidirectional fundamental channels despite infrequent transmit/receive packets in. the conventional packet data service. For example, assuming that packet data i.s transmi.tted/received for one second in about one minute interval, the communication system should remain logged on the bidirectional fundamental channels for 59 seconds even with a data transmission/reception suspended. 1n this case, a signal transmitted on the bidirectional fmldanientals interferes with.
another channel, resulting in wasted capacity of another supportable service in the GDMA
- s -communication network. Furthermore, as more users demand for the packet data service, the CDMA. mobile communication network becomes less accessible to users con tined to voice communication on fundamental channels only.
Tl~e constraint of. ColltlrruorrS C0r111eCtloll between. the terminal and th.e base station for a short packet transmi.ssion/reception increases packet data communication cost and places an obstacle on wide provision of the packet data communication over the CDMA mobile communication network. As a result, the CDMA mobile communication lags behind other communication systems in competitiveness and will be less provided.
SUMMARY OF THE INVENTION
An object of the present invention i.s to provide a packet data service providing method in a CDMA mobile communication. system, for occupying channels only during packet transrnission/reception while a call is established.
Another object of the present invention is to a packet data service providing method, for processing voice and data service channels independently with. a new channel structure intl-oduced.
To achieve the above objects, there is provided a packet data service providing method between a tennilal and a base station in a mobile commmlication system. In the nieth.od, packet data is transmitted from the terminal (base station) on a reverse (forward) channel to the base station (terminal) during a data tlvansmission period, and the occupation. of. the reverse (forward) terminal.
is released during a data transmission suspended period.
BRIEF DESCRIPTION OF THE DRAWINGS
The above objects and advantages of the present invention will become more apparent by describing in detail a prefen-ed embodiment thereof with reference to the attaclred drawings in which:
FIG. 1 is a block diagram of a terminal, a base station, and a radio li.n.k in a mobile cornmruii.catiorr system;
FIG. 2 illustrates the structure of areverse channel for a conventional packet data sewice;
FIG. 3 illustrates th.e structure of. a forward channel for the conventional packet data service;
FIG. 4 is a .flowchart of using channels for th.e conventional packet data service;
FIG. 5 illustrates a state transition diagram of a terminal. on the basis of.
a conventional CDMA standal-d;
FIG. 6 illustrates the structure of a forward channel for a packet data service according to an embodiment of the present invention;
FIG. 7 illustrates the structure of a reverse channel for the packet data service according to th.e embodiment of the present invention;
FIG. 8 is a state transition diagram of a terminal for the packet data service according to the embodiment of the present invention;
FIG. 9 illustrates the timing of a packet control channel with respect to that of a forward packet traffic channel;
FIG. 10 illustrates th.e timing of th.e packet control channel with respect to that of a reverse packet traffic channel; and FIG. 11 is a block diagram of a base station and a terminal. in a communication. system for the packet data service according to the embodiment of the present invention.
DETAILED DESCRLPT.ION OF THE PREFERRED EMBODIMENT
A. packet data service providing rnetlrod in a CDMA communication. system according to au embodiment of the present invention avoids occupation of forward and reverse channels during a packet data service suspension period with. a call.
established, to thereby reduce overheads caused by contiguous occupation of fundatn.ental changers for transm.ission/reception of packet data and afford a packet data service to a large number of terminals with one or- a small number of common channels.
New channel. structures are designed for the above packet data service, as shown in FIGS. 6 and 7. A forward channel includes a pilot channel, a sync channel, a paging channel, a packet control channel, a .forward packet traffic charrlrel, and a forward traffic channel in FIG. 6. The forward traffic charmer is .fw-ther divided into a fiu~damental channel anal a supplemental channel. A reverse charnel includes an. access charnel, a reverse packet traffic channel, and a reverse traffic channel in FIG. 7. The reverse traffic channel is also divided into a fundamental channel and a supplemental channel.
Two for-wal-d channels and one reverse channel are newly defined in the channel. structm'es of FIGs. 6 and 7 for the packet data service according to the _ g _ embodiment of the present invention: the packet control channel and the forward packet traff c channel in t1e forward channel; anal the reverse packet traif c channel.
in the reverse channel.. The forward packet traffic channel supports a path of. packet data travelling OI1 a fol-ward link from a base station to a terminal. The reverse packet traffic channel supports a path of packet data travelling on a reverse link fi-otn. the terminal to tl~e base station.
The packet control channel acts to control tel-minals so that a large number of terminals accommodate a small number of forward and reverse packet traffic cl~anlels. It also controls the output power level of a tennin.al accessing;
to a system on the reverse packet traffic channel, thereby controlling a system capacity, in turn.
The introduction of the new channels for the packet data service brings a change to the con.ven.tional state transition diagram of FIG. 5. FIG. 8 is a state transition diagram of a terminal for the packet data service according to the embodiment of. the present invention.
Refewing to FIG. 8, when. power is initially on in a state 81.1, the terminal is set to an initialization state 81.2. If the tornain.al synchronizes its timing to that of a system iti the initialization state 81.2, it transits to an idle state 813.
T.he terminal may attempt a call, the base station transmits inforniation of the call attempt to the terminal on a pagilg channel, and the terminal. sends a page response message to the base station on an access channel., ita the idle state 813. Then, the tel-minal is set to a system access state 81.4. If the tel-minal fails to obtain. a paging chanlel message or is directed from the base station to a different adjacent base station in a handoff in the idle state 813, th.e terminal returns to th.e initialization state 812.
_ g _ If the terminal succeeds in the call attempt or reception of the call acknowledge signal in the system access state 814, it goes to a traffic channel state 815. On the contrary, if. the terminal succeeds in system access except for the call attempt or reception of a call acknowledge signal in th.e system access state 814, the terminal retw-ns to the idle state 813. When a packet anode is registered in the system access state 81.4, aloe terminal is set to a packet idle state 816.
Meanwhile, when traffic channels stop their action in the traffic channel state 815, the terminal I'et11I71S to initialization state 812.
D11I'Lilg tran.smission/reception of packet data, the tenn.inal .i.s di.rected from the packet idle state 816 to a packet busy state 817. Llpon completion of packet tran.srni.ssion/reception, the terminal returns to the packet idle state 816.
T.he tetmin.al alternates between the packet idle state 816 and the packet busy state 817 depending on packet data transmi.ssion/reception. or vice versa. When the packet mode is over in. th.e packet idle state 816, the terminal retLUms to the initialization state 812.
The terminal. mainly aiming at a packet data service as shown. in FIG. 8 transits not to the traffic channel state 815 but to the packet idle state 81.6 upon registration of the packet mode i.n th.e system access state 814.
In th.e packet idle state 816, the terminal peri.odi.cally monitors a packet control channel to determine whether there is packet data to be received on a forward packet traffic channel. In the presence of receive packet data, the terminal demodulates the forward packet traffic channel during a predetermined time in the packet busy state 81.7.
When there is packet data to be transmitted from the terminal in the packet idle state 816, it waits for an authorization to use a reverse packet traffic channel, while monitoring the packet control channel. Upon receipt of the authorization, the te~-~ni.nal transmits the packets on th.e reverse packet traffic channel in the packet busy state 817.
Upon completion of tile packet data transmission/reception on the forward and reverse packet traffic channels in the packet busy state 81.7, the terminal periodically monitors the packet control channel agai..n in the packet idle state 816.
The pm-pose of using th.e packet control channel i.s to reliably provide a packet data service to a large number of terminals in the packet idle state via a small number of forward and reverse packet traffic chancels. The packet control channel also controls the output power level of a terminal. on a reverse packet traffic channel, thus increasing system capacity.
The packet control channel is constituted as in table l..
Table 1.
forward packet reverse packet reverse packet trafficreserved traffic channeltraffic channel cliannel power control bit status access control (variable BW) The packet control channel of the above structure remains on, and a single packet control channel occupies one code channel. A plurality of packet control channels can be used for many packet data service subscribers. The single packet contl-ol charmer is accompanied by one or more forward and reverse packet traffic channels.
A.s shown in. table l., the packet control channel should notify a terminal.
which. terminal to occupy a forward packet h-af.Iic charnel by broadcasting the status of the forward packet traffic channel. It also sh.oul.d broadcast information.
of an access authority to terminals wlvch intend to occupy areverse packet traffic channel so that an. authorized terminal may transm..it packet data on the reverse traf~.c channel. The packet control channel transmits a power control bit to control the output power levels of tenn.inals in th.e process of trala.smitting packet data on the reverse packet traffic channels. Then, the corresponding tenninal.s should adjust their own output power levels as directed by the power control bit.
FIG. 9 illustrates the timing of th.e packet control channel with respect to that of the forwal-d packet traffic channel, and FIG. 10 illustrates the timing of.
the packet control. channel with respect to that of the reverse packet traffic chanliel..
Referring to FIG. 9, reference numerals 9a and 9b denote the packet control.
channel and the forward packet traffic channel, respectively. Reference characters FPC i and FPT i indicate packet control channel data anal forward packet traff.c channel data, assigned to an i-th time slot, respectively.
The terminal is informed of the presence of packet data addressed thereto oli the packet control channel, while montoring the packet control channel 9a, and then demodulates the forward packet traffic channel. 9b. The forward packet traffic channel status information of. th.e packet control c.l.~an.nel 9a assigned to an. i-th time slot indicates a terminal for which the packet data of an (i+1)-th. tune slot of. the forward packet traffic channel 9b. Here, a time slot unit T = T;+, - T,.
Refen-ing to FIG. 1.0, reference characters 10a and lOb denote the packet conU-ol channel. and the reverse packet traffic channel, respectively.
Reference character FPCi i.ndi.cates packet control channel data assigned to an i-th time slot, for designating a terminal to access an (i+1)-th time slot and controlling the power of te1-minals accessing in the i-th time slot. Reference character RPTi indicates reverse packet traffic channel data assil;ned to the i-th time slot and having a st1-ucture of preamble preceding data. Only terminals authorized to access in an (i-1)-th time slot can access the i-th time slot and a terminal authorized but having no transmit data i.s denied access. Here, the time slot unit T = T;+, - T,.
FIG. 11 is a block diagram of a base station and a terminal for packet data communications in a communication system according to an. embodiment of. the present invention.
In a base station 1100, a packet controller 111.1 outputs col-respondi.ng signaling signals to a packet control data transceiver 1113 and control signals to cowespoliding transceivers 1.115, 1117, and 1119 in order to transmit packet data to a terminal 1200 or receive packet data from the terminal 1200. The signaling signals output from the packet controller l 1.1l include a forward packet signal F SIGP, a reverse packet signal R-SIGP, a forward voice signal F SIGV, a reverse voice signal R SIGV, a forward continuous data signal F SIGC, and a reverse C011t1111to11S data signal R SIGC, anal the control signals include a data receive control. signal R CTL and a data transmit control. signal T CTL.
The packet control data transceiver 1113 transmits the signaling signals F SIGP, R SIGP, F SIGV, R~SIGV, F SIGC, and R SIGC on a packet control.
signal under the control of the packet controller 11.11. The packet traffic data transceiver 1.1 I S tran.smits/receives packet data to/from the terminal 1.200 on packet traffic channels by control signals T CTL1 and R CTLI. output fi~otn the packet controller 111.1. The fundamental. data transceiver 1117 transmits/receives data to/from the tet~tninal 1200 on fundamental channels by control signals T CTL2 and R_CTL2 output from the packet controller 11.11. The supplemental data transceiver 119 transmits/receives supplemental data to/ti~om the terminal 1200 on supplemental channel. by contt~ol signals T CTL3 and R CTL3 output.from th.e packet controller 111.1.
In the terminal 100, a packet controller 1222 outputs control signals t-ctl and t ctl for receivi..ng packet data on. a .forward channel or hvansmi.ttiag data on a reverse channel by analysing the signaling signals received from the packet control data transceiver 11.1.3 of. the base station. 11.00. The packet controller 1222 also outputs switch control signals F ON, F OFF, and OFF for selecting a forward or reverse link. The receive control signal r ctl and the transmit control signal t ctl are used to control cowespon.ding transceivers 1224, 1226, arid 1228 for processing data translnitted/recei.ved on the .forward/reverse channels. The switch control signal.
F ON serves to twn on a forward link and tuna off a reverse li.llc, the switch control signal F OFF serves to turn off th.e forward link and turn on the reverse link, and the control signal OFF serves to turli off. both the forward and reverse licks.
A. f.rst switch 1234 selects a path for the packet traffic data by th.e switch control signals F ON 1., F OFF l, and OFF 1. output from the packet controller 1.222.
The packet traffic data transceiver 1224, connected to the first switch 1234, transtni.ts or receives packet data on a link selected by the switch 1.234 under the control of the control signal. t ctl 1 or ~-ctl l output f_i-om the packet controller 1.222.
A second witch 1236 selects a path for th.e fundamental channel data by the switch control signals F ON2, F OFF2, and OFF2 output from the packet controller 1222. The fimdanien.tal data transceiver 1226, connected to the second switch .1.236, transmits or receives th.e fundamental channel data on a link selected by the second switch .1.236 under the control of the control signal t ctl2 or r ctl2 output fi-oln the packet cont~~oll.er 1222.
A third switch 1238 selects a path for the supplemental channel data by the switch control signals F ON3, F OFF3, and OFF3 output from the packet controller 1.222. The supplemental data transceiver 1.228, connected to the third switch 1238, transmits or receives the supplemental channel data on a link selected by the third switch 1238 under the control of the control signals t ctl3 or 1_ctl3 output from the packet controller 1222.
Referring to FIG. 11, the base station 1100 and the terminal 129.9 according to the embodiment of. the present invention employ their respective charmel structm-es for .independently supporting packet data, as described before.
That is, the charnel structure of the present invention shown in FIGS. 6 anal 7 newly define two forwal-d channels and one reverse channel. Here, the new forward chancels are a packet control channel. and a forward packet traffic channel, and the n.ew reverse chalmel is a reverse packet traffic channel. The forward packet traffic channel supports a path for packet data to be transmitted on a forward channel from a base station to a terminal. The reverse packet traffic channel supports a path for transmitting packet data on a reverse channel. from the terminal. to the base stati.on..
In addition, the packet control channel allows a large number of. terminals to share a small lumber of forward and reverse channels, and controls the output power levels of. tel-lninals accessing to a system via reverse packet traffic c.ha.nnels to thereby control system capacity.
Tl.~e control signals as shown in FIG. L 1 are defned in the following table.
Table 2 F SIGP forward packet signal R CTL data receive control r ctl signal R SIGP reverse packet signal T CTL data transmit control t ctl signal F SIG forward voice signal F ON forward link ON
V reverse link OFF
R SIG reverse voice signal F OFF forward link OFF
V reverse link ON
F SIGC forwal-d continuous data OFF fol~.vard link signal OFF
reverse 1W k OFF
R SIG reverse continuous data signal C
Intermittent forward packet data communication from the base station 1 1U0 to the terminal 1200 The packet controller 1111 sends the control signal F SIGP to the packet controller 1.222 on the packet control channel by control.l.ing the packet control data transceiver 11 13, and outputs the control signal T CTL1 to the packet traffic data transceiver 11. l.5 to designate a forward packet traffic channel. Llpon receipt of. tile control signal F SIGP from the base station 1100, the packet controller 1222 outputs the control. signal r-ctrl to the packet traffic data transceiver 1224, and the control signals F ON1, OFF2,OFF3 to the first to third switches 1234 to 1.238, respectively. In this case, the base station 11.00 sends packet data on tlr.e designated forward packet traffic channel and the terminal 1200 processes the packet data received via the designated forward packet traff.c channel. During transmission/reception of packet data on the forward link, the base station 1100 and the terminal 1200 use only the packet traffic channels, not folwar-d fiu~damen.tal and supplemental channels. Upon completion of. the packet data translnission/reception on tl.~e forward Link,, the packet controller 1222 outputs the control signal OFF I. to the first switch 1234 to disconnect the packet data tl-ansmission/reception path oli a forward link.
Intermittent reverse packet data communication from the terminal 1200 to the base station 11.00 The packet controller 11.11 of the base station 11.00 outputs the control signal R S1GP to the packet controller 1.222 of the terminal 1200 on the packet control channel by periodically controlling the packet control data transceiver 111.3.
In the presence of packet data to be transmitted to th.e base station 1100, the packet controller 1222 of the terminal 1200 designates a packet traffic charnel by outputting the control signal t ctr l to th.e packet tl-affic data transceiver 1234 and selects a reverse packet traffic channel by outputting the control signal F-OFF 1. to the .fi.rst switch 1234. The packet controller 1.222 of the ternli.nal 1200 turfs off a link .for a fmidanlental channel and a supplemental charnel by outputting the control signals OFF2 and OFF3 to the second and third switches 1236 and 1238, respectively. Then, the terninal 1.200 transmits packet data on. the reverse traffic channel to the base station 1100. On the other hand, in. the absence of packet data to be transmitted to the base station 1100, the packet controller 1222 of the terminal 1200 outputs the control signals OFF1, OFF2, and OFF3 to the first to third switches 1234, 1.236, and 1238, respectively, to thereby tulm off the link for the channels.
Continuous forward data communication from the base station 1.100 to the terminal 1200 The packet controller 11.11 of the base station 11.00 sends the con t1-ol signal F SIGC to the packet controller 1222 of the tel-mi.nal on the packet control channel by controlling the packet control data transceiver 1113, and outputs the control signals T CTL2 and T CTL3 to the fundamental. data ta-ansceiver 1117 and the supplemental data transceiver 111.9, respectively, to thereby send data of fun.dam.ental and supplemental channels. Upon receipt of the control signal.
F SIGC, th.e packet conU-oll.er 1222 of the terninal. 1.200 outputs the control signals r ctl2 and r ctl.3 to the fundamental data transceiver 1226 anal the supplemental data transceiver 1228, respectively, and outputs the control sigmals F ON2 and F
to the second and third switches 1236 and 1238, respectively, so that a path is desi~n.ated to receive data continuously on the forward fmdamental and supplemental channels. Then, the base station 1100 continuously tl-a~.~smits data on the designated forward fmdalnental and supplemental. channels to the terminal 1200.
Continuous reverse data co~.n:mw.~.ication from the terni.nal 1.200 to th.e base station 1100 The packet controller 1111 con tt-ols th.e packet control data hvansceiver to periodically transmit the control signal R SIGC to the packet controller 1222 of the terminal 1200 on the packet control charnel, and receives continuous data front the terminal. 1200 on reverse fundamelital and supplemental channels by outputting the control signals R-CT.L2 and R CTL3 to the fmdaniental data transceiver and tloe supplemental data transceiver 1117, respectively. In addition, in the presence of. data to be continuously transmitted to the base station 1100, the packet control.l.er 1.222 of the terminal 1200 outputs the control signals t ctl2 and t ctl3 to the fmdalnental data transceiver 1226 and the supplemental data transceiver 1.228, respectively, and th.e control signals OFF1, F OFF2, and F OFF3 to the first to third switches 1.234 to 1238. Then, th.e terminal 1200 continuously outputs data oli the reverse filndamental and supplemental channels. In the absence of data to be continuously transmitted to the base station 11.00, the packet controller 1.222 outputs the control signals OFF1 to OF.F3 to the .first to third switches 1.234 to 1238, respectively. Therefore, tile terminal 1200 transmits data continuously oli the designated reverse .fundamental and supplemental channels to the base station 1100.
Fol-ward voice colnmuni.cation from the base station 11.00 to the terminal.
The packet controller 11.11. of the base station 11.00 sends the control.
signal F SIGV to the packet controller 1222 of th.e tetm.inal 1200 by controlling the packet control data transceiver 1113 and outputs voice data on the forward .fmdamental chan~iel by outputting the control signal T CTL2 to the fundamental data transceiver 1.117. Upon receipt of the control signal F SIGV on the forward packet contt~ol channel, the packet coaltroller 1222 of the terminal 1200 outputs the control signals yctl2 to the fundamental data transceiver 1226, and the cont~~ol signals OFFI, F ON2, and OFF3 to the first to third switches 1234 to 1238, respectively.
Thus, the base station 1100 transmits th.e voice data on the forward fm~.damental chancel to the terminal 1.200.
Reverse voice communication ii~om the terminal 1200 to the base station The packet controller 1111 of the base station 1200 sends the conh~ol signal R-SIGV to the packet controller 1222 of tl.~e terminal 1200 on the packet control channel by controlluig th.e packet control data transceiver 1113 and designates a reverse i:undamental channel by outputti~.ig the control signal R-CTL2 to the fmdam.ental data transceiver 1117. Here, in th.e presence of voice data to be transmitted to th.e base station 1.1.00, the packet controller 1.222 of the base statio~i 1200 outputs the control sigmal t ctl2 to the fundamental data transceiver 1226 and designates the reverse fun.damen.tal channel by outputting the control signals OFF 1, F OFF2, anal OFF3 to the first to third switches 1234 to 1238, respectively.
Thus, the terminal 1200 outputs voice data on. th.e reverse fundamental channel to the base station 1.200.
As described above, the present invention may maximize channel resource use efficiency in a packet data service of a mobile communication network by introducing the packet control channel and the forward anal reverse packet traffic.
That i.s, the forward or reverse channels are occupied during a packet data transmissioWreception period after a call set-up, and are unoccupied during a packet data transmission/reception. suspended period, thereby enabling efficient use of channel capacity.
While the present invention has been described in detail with reference to the specif c em.bodinient, it is a mere exemplary application. Thus, it is to be clearly mderstood that matey variations can be made within the scope and spirit of the present invention. .en actually impletnenti.ng the packet data service as described above, the timing of. the packet control channel with respect to that of the packet traffic channel can be different from that as shown. i.n. FIGs. 9 and 10. For example, the i-th time slot of. the packet control channel may designate an (i+j)-th time slot of the packet traffic channel instead of the (i+l.)-th. time slot.
Here, if. the terminal succeeds ui system. access except for the call attempt or reception. of a call acknowledge signal in the system access state 51.4, the terminal.
retmms to the idle state 513. On the contrary, if th.e terminal succeeds in.
the call attempt or reception of. the call acknowledge signal in the system access state 514, it goes to a traffic channel state 515. The traff:~c channel state 515 lasts as long as traffic is processed. Wlien. traffic channels stop their action, the terminal retw-ns to the initialization state 512.
A communication system should maintaui a call on bidirectional fundamental channels despite infrequent transmit/receive packets in. the conventional packet data service. For example, assuming that packet data i.s transmi.tted/received for one second in about one minute interval, the communication system should remain logged on the bidirectional fundamental channels for 59 seconds even with a data transmission/reception suspended. 1n this case, a signal transmitted on the bidirectional fmldanientals interferes with.
another channel, resulting in wasted capacity of another supportable service in the GDMA
- s -communication network. Furthermore, as more users demand for the packet data service, the CDMA. mobile communication network becomes less accessible to users con tined to voice communication on fundamental channels only.
Tl~e constraint of. ColltlrruorrS C0r111eCtloll between. the terminal and th.e base station for a short packet transmi.ssion/reception increases packet data communication cost and places an obstacle on wide provision of the packet data communication over the CDMA mobile communication network. As a result, the CDMA mobile communication lags behind other communication systems in competitiveness and will be less provided.
SUMMARY OF THE INVENTION
An object of the present invention i.s to provide a packet data service providing method in a CDMA mobile communication. system, for occupying channels only during packet transrnission/reception while a call is established.
Another object of the present invention is to a packet data service providing method, for processing voice and data service channels independently with. a new channel structure intl-oduced.
To achieve the above objects, there is provided a packet data service providing method between a tennilal and a base station in a mobile commmlication system. In the nieth.od, packet data is transmitted from the terminal (base station) on a reverse (forward) channel to the base station (terminal) during a data tlvansmission period, and the occupation. of. the reverse (forward) terminal.
is released during a data transmission suspended period.
BRIEF DESCRIPTION OF THE DRAWINGS
The above objects and advantages of the present invention will become more apparent by describing in detail a prefen-ed embodiment thereof with reference to the attaclred drawings in which:
FIG. 1 is a block diagram of a terminal, a base station, and a radio li.n.k in a mobile cornmruii.catiorr system;
FIG. 2 illustrates the structure of areverse channel for a conventional packet data sewice;
FIG. 3 illustrates th.e structure of. a forward channel for the conventional packet data service;
FIG. 4 is a .flowchart of using channels for th.e conventional packet data service;
FIG. 5 illustrates a state transition diagram of a terminal. on the basis of.
a conventional CDMA standal-d;
FIG. 6 illustrates the structure of a forward channel for a packet data service according to an embodiment of the present invention;
FIG. 7 illustrates the structure of a reverse channel for the packet data service according to th.e embodiment of the present invention;
FIG. 8 is a state transition diagram of a terminal for the packet data service according to the embodiment of the present invention;
FIG. 9 illustrates the timing of a packet control channel with respect to that of a forward packet traffic channel;
FIG. 10 illustrates th.e timing of th.e packet control channel with respect to that of a reverse packet traffic channel; and FIG. 11 is a block diagram of a base station and a terminal. in a communication. system for the packet data service according to the embodiment of the present invention.
DETAILED DESCRLPT.ION OF THE PREFERRED EMBODIMENT
A. packet data service providing rnetlrod in a CDMA communication. system according to au embodiment of the present invention avoids occupation of forward and reverse channels during a packet data service suspension period with. a call.
established, to thereby reduce overheads caused by contiguous occupation of fundatn.ental changers for transm.ission/reception of packet data and afford a packet data service to a large number of terminals with one or- a small number of common channels.
New channel. structures are designed for the above packet data service, as shown in FIGS. 6 and 7. A forward channel includes a pilot channel, a sync channel, a paging channel, a packet control channel, a .forward packet traffic charrlrel, and a forward traffic channel in FIG. 6. The forward traffic charmer is .fw-ther divided into a fiu~damental channel anal a supplemental channel. A reverse charnel includes an. access charnel, a reverse packet traffic channel, and a reverse traffic channel in FIG. 7. The reverse traffic channel is also divided into a fundamental channel and a supplemental channel.
Two for-wal-d channels and one reverse channel are newly defined in the channel. structm'es of FIGs. 6 and 7 for the packet data service according to the _ g _ embodiment of the present invention: the packet control channel and the forward packet traff c channel in t1e forward channel; anal the reverse packet traif c channel.
in the reverse channel.. The forward packet traffic channel supports a path of. packet data travelling OI1 a fol-ward link from a base station to a terminal. The reverse packet traffic channel supports a path of packet data travelling on a reverse link fi-otn. the terminal to tl~e base station.
The packet control channel acts to control tel-minals so that a large number of terminals accommodate a small number of forward and reverse packet traffic cl~anlels. It also controls the output power level of a tennin.al accessing;
to a system on the reverse packet traffic channel, thereby controlling a system capacity, in turn.
The introduction of the new channels for the packet data service brings a change to the con.ven.tional state transition diagram of FIG. 5. FIG. 8 is a state transition diagram of a terminal for the packet data service according to the embodiment of. the present invention.
Refewing to FIG. 8, when. power is initially on in a state 81.1, the terminal is set to an initialization state 81.2. If the tornain.al synchronizes its timing to that of a system iti the initialization state 81.2, it transits to an idle state 813.
T.he terminal may attempt a call, the base station transmits inforniation of the call attempt to the terminal on a pagilg channel, and the terminal. sends a page response message to the base station on an access channel., ita the idle state 813. Then, the tel-minal is set to a system access state 81.4. If the tel-minal fails to obtain. a paging chanlel message or is directed from the base station to a different adjacent base station in a handoff in the idle state 813, th.e terminal returns to th.e initialization state 812.
_ g _ If the terminal succeeds in the call attempt or reception of the call acknowledge signal in the system access state 814, it goes to a traffic channel state 815. On the contrary, if. the terminal succeeds in system access except for the call attempt or reception of a call acknowledge signal in th.e system access state 814, the terminal retw-ns to the idle state 813. When a packet anode is registered in the system access state 81.4, aloe terminal is set to a packet idle state 816.
Meanwhile, when traffic channels stop their action in the traffic channel state 815, the terminal I'et11I71S to initialization state 812.
D11I'Lilg tran.smission/reception of packet data, the tenn.inal .i.s di.rected from the packet idle state 816 to a packet busy state 817. Llpon completion of packet tran.srni.ssion/reception, the terminal returns to the packet idle state 816.
T.he tetmin.al alternates between the packet idle state 816 and the packet busy state 817 depending on packet data transmi.ssion/reception. or vice versa. When the packet mode is over in. th.e packet idle state 816, the terminal retLUms to the initialization state 812.
The terminal. mainly aiming at a packet data service as shown. in FIG. 8 transits not to the traffic channel state 815 but to the packet idle state 81.6 upon registration of the packet mode i.n th.e system access state 814.
In th.e packet idle state 816, the terminal peri.odi.cally monitors a packet control channel to determine whether there is packet data to be received on a forward packet traffic channel. In the presence of receive packet data, the terminal demodulates the forward packet traffic channel during a predetermined time in the packet busy state 81.7.
When there is packet data to be transmitted from the terminal in the packet idle state 816, it waits for an authorization to use a reverse packet traffic channel, while monitoring the packet control channel. Upon receipt of the authorization, the te~-~ni.nal transmits the packets on th.e reverse packet traffic channel in the packet busy state 817.
Upon completion of tile packet data transmission/reception on the forward and reverse packet traffic channels in the packet busy state 81.7, the terminal periodically monitors the packet control channel agai..n in the packet idle state 816.
The pm-pose of using th.e packet control channel i.s to reliably provide a packet data service to a large number of terminals in the packet idle state via a small number of forward and reverse packet traffic chancels. The packet control channel also controls the output power level of a terminal. on a reverse packet traffic channel, thus increasing system capacity.
The packet control channel is constituted as in table l..
Table 1.
forward packet reverse packet reverse packet trafficreserved traffic channeltraffic channel cliannel power control bit status access control (variable BW) The packet control channel of the above structure remains on, and a single packet control channel occupies one code channel. A plurality of packet control channels can be used for many packet data service subscribers. The single packet contl-ol charmer is accompanied by one or more forward and reverse packet traffic channels.
A.s shown in. table l., the packet control channel should notify a terminal.
which. terminal to occupy a forward packet h-af.Iic charnel by broadcasting the status of the forward packet traffic channel. It also sh.oul.d broadcast information.
of an access authority to terminals wlvch intend to occupy areverse packet traffic channel so that an. authorized terminal may transm..it packet data on the reverse traf~.c channel. The packet control channel transmits a power control bit to control the output power levels of tenn.inals in th.e process of trala.smitting packet data on the reverse packet traffic channels. Then, the corresponding tenninal.s should adjust their own output power levels as directed by the power control bit.
FIG. 9 illustrates the timing of th.e packet control channel with respect to that of the forwal-d packet traffic channel, and FIG. 10 illustrates the timing of.
the packet control. channel with respect to that of the reverse packet traffic chanliel..
Referring to FIG. 9, reference numerals 9a and 9b denote the packet control.
channel and the forward packet traffic channel, respectively. Reference characters FPC i and FPT i indicate packet control channel data anal forward packet traff.c channel data, assigned to an i-th time slot, respectively.
The terminal is informed of the presence of packet data addressed thereto oli the packet control channel, while montoring the packet control channel 9a, and then demodulates the forward packet traffic channel. 9b. The forward packet traffic channel status information of. th.e packet control c.l.~an.nel 9a assigned to an. i-th time slot indicates a terminal for which the packet data of an (i+1)-th. tune slot of. the forward packet traffic channel 9b. Here, a time slot unit T = T;+, - T,.
Refen-ing to FIG. 1.0, reference characters 10a and lOb denote the packet conU-ol channel. and the reverse packet traffic channel, respectively.
Reference character FPCi i.ndi.cates packet control channel data assigned to an i-th time slot, for designating a terminal to access an (i+1)-th time slot and controlling the power of te1-minals accessing in the i-th time slot. Reference character RPTi indicates reverse packet traffic channel data assil;ned to the i-th time slot and having a st1-ucture of preamble preceding data. Only terminals authorized to access in an (i-1)-th time slot can access the i-th time slot and a terminal authorized but having no transmit data i.s denied access. Here, the time slot unit T = T;+, - T,.
FIG. 11 is a block diagram of a base station and a terminal for packet data communications in a communication system according to an. embodiment of. the present invention.
In a base station 1100, a packet controller 111.1 outputs col-respondi.ng signaling signals to a packet control data transceiver 1113 and control signals to cowespoliding transceivers 1.115, 1117, and 1119 in order to transmit packet data to a terminal 1200 or receive packet data from the terminal 1200. The signaling signals output from the packet controller l 1.1l include a forward packet signal F SIGP, a reverse packet signal R-SIGP, a forward voice signal F SIGV, a reverse voice signal R SIGV, a forward continuous data signal F SIGC, and a reverse C011t1111to11S data signal R SIGC, anal the control signals include a data receive control. signal R CTL and a data transmit control. signal T CTL.
The packet control data transceiver 1113 transmits the signaling signals F SIGP, R SIGP, F SIGV, R~SIGV, F SIGC, and R SIGC on a packet control.
signal under the control of the packet controller 11.11. The packet traffic data transceiver 1.1 I S tran.smits/receives packet data to/from the terminal 1.200 on packet traffic channels by control signals T CTL1 and R CTLI. output fi~otn the packet controller 111.1. The fundamental. data transceiver 1117 transmits/receives data to/from the tet~tninal 1200 on fundamental channels by control signals T CTL2 and R_CTL2 output from the packet controller 11.11. The supplemental data transceiver 119 transmits/receives supplemental data to/ti~om the terminal 1200 on supplemental channel. by contt~ol signals T CTL3 and R CTL3 output.from th.e packet controller 111.1.
In the terminal 100, a packet controller 1222 outputs control signals t-ctl and t ctl for receivi..ng packet data on. a .forward channel or hvansmi.ttiag data on a reverse channel by analysing the signaling signals received from the packet control data transceiver 11.1.3 of. the base station. 11.00. The packet controller 1222 also outputs switch control signals F ON, F OFF, and OFF for selecting a forward or reverse link. The receive control signal r ctl and the transmit control signal t ctl are used to control cowespon.ding transceivers 1224, 1226, arid 1228 for processing data translnitted/recei.ved on the .forward/reverse channels. The switch control signal.
F ON serves to twn on a forward link and tuna off a reverse li.llc, the switch control signal F OFF serves to turn off th.e forward link and turn on the reverse link, and the control signal OFF serves to turli off. both the forward and reverse licks.
A. f.rst switch 1234 selects a path for the packet traffic data by th.e switch control signals F ON 1., F OFF l, and OFF 1. output from the packet controller 1.222.
The packet traffic data transceiver 1224, connected to the first switch 1234, transtni.ts or receives packet data on a link selected by the switch 1.234 under the control of the control signal. t ctl 1 or ~-ctl l output f_i-om the packet controller 1.222.
A second witch 1236 selects a path for th.e fundamental channel data by the switch control signals F ON2, F OFF2, and OFF2 output from the packet controller 1222. The fimdanien.tal data transceiver 1226, connected to the second switch .1.236, transmits or receives th.e fundamental channel data on a link selected by the second switch .1.236 under the control of the control signal t ctl2 or r ctl2 output fi-oln the packet cont~~oll.er 1222.
A third switch 1238 selects a path for the supplemental channel data by the switch control signals F ON3, F OFF3, and OFF3 output from the packet controller 1.222. The supplemental data transceiver 1.228, connected to the third switch 1238, transmits or receives the supplemental channel data on a link selected by the third switch 1238 under the control of the control signals t ctl3 or 1_ctl3 output from the packet controller 1222.
Referring to FIG. 11, the base station 1100 and the terminal 129.9 according to the embodiment of. the present invention employ their respective charmel structm-es for .independently supporting packet data, as described before.
That is, the charnel structure of the present invention shown in FIGS. 6 anal 7 newly define two forwal-d channels and one reverse channel. Here, the new forward chancels are a packet control channel. and a forward packet traffic channel, and the n.ew reverse chalmel is a reverse packet traffic channel. The forward packet traffic channel supports a path for packet data to be transmitted on a forward channel from a base station to a terminal. The reverse packet traffic channel supports a path for transmitting packet data on a reverse channel. from the terminal. to the base stati.on..
In addition, the packet control channel allows a large number of. terminals to share a small lumber of forward and reverse channels, and controls the output power levels of. tel-lninals accessing to a system via reverse packet traffic c.ha.nnels to thereby control system capacity.
Tl.~e control signals as shown in FIG. L 1 are defned in the following table.
Table 2 F SIGP forward packet signal R CTL data receive control r ctl signal R SIGP reverse packet signal T CTL data transmit control t ctl signal F SIG forward voice signal F ON forward link ON
V reverse link OFF
R SIG reverse voice signal F OFF forward link OFF
V reverse link ON
F SIGC forwal-d continuous data OFF fol~.vard link signal OFF
reverse 1W k OFF
R SIG reverse continuous data signal C
Intermittent forward packet data communication from the base station 1 1U0 to the terminal 1200 The packet controller 1111 sends the control signal F SIGP to the packet controller 1.222 on the packet control channel by control.l.ing the packet control data transceiver 11 13, and outputs the control signal T CTL1 to the packet traffic data transceiver 11. l.5 to designate a forward packet traffic channel. Llpon receipt of. tile control signal F SIGP from the base station 1100, the packet controller 1222 outputs the control. signal r-ctrl to the packet traffic data transceiver 1224, and the control signals F ON1, OFF2,OFF3 to the first to third switches 1234 to 1.238, respectively. In this case, the base station 11.00 sends packet data on tlr.e designated forward packet traffic channel and the terminal 1200 processes the packet data received via the designated forward packet traff.c channel. During transmission/reception of packet data on the forward link, the base station 1100 and the terminal 1200 use only the packet traffic channels, not folwar-d fiu~damen.tal and supplemental channels. Upon completion of. the packet data translnission/reception on tl.~e forward Link,, the packet controller 1222 outputs the control signal OFF I. to the first switch 1234 to disconnect the packet data tl-ansmission/reception path oli a forward link.
Intermittent reverse packet data communication from the terminal 1200 to the base station 11.00 The packet controller 11.11 of the base station 11.00 outputs the control signal R S1GP to the packet controller 1.222 of the terminal 1200 on the packet control channel by periodically controlling the packet control data transceiver 111.3.
In the presence of packet data to be transmitted to th.e base station 1100, the packet controller 1222 of the terminal 1200 designates a packet traffic charnel by outputting the control signal t ctr l to th.e packet tl-affic data transceiver 1234 and selects a reverse packet traffic channel by outputting the control signal F-OFF 1. to the .fi.rst switch 1234. The packet controller 1.222 of the ternli.nal 1200 turfs off a link .for a fmidanlental channel and a supplemental charnel by outputting the control signals OFF2 and OFF3 to the second and third switches 1236 and 1238, respectively. Then, the terninal 1.200 transmits packet data on. the reverse traffic channel to the base station 1100. On the other hand, in. the absence of packet data to be transmitted to the base station 1100, the packet controller 1222 of the terminal 1200 outputs the control signals OFF1, OFF2, and OFF3 to the first to third switches 1234, 1.236, and 1238, respectively, to thereby tulm off the link for the channels.
Continuous forward data communication from the base station 1.100 to the terminal 1200 The packet controller 11.11 of the base station 11.00 sends the con t1-ol signal F SIGC to the packet controller 1222 of the tel-mi.nal on the packet control channel by controlling the packet control data transceiver 1113, and outputs the control signals T CTL2 and T CTL3 to the fundamental. data ta-ansceiver 1117 and the supplemental data transceiver 111.9, respectively, to thereby send data of fun.dam.ental and supplemental channels. Upon receipt of the control signal.
F SIGC, th.e packet conU-oll.er 1222 of the terninal. 1.200 outputs the control signals r ctl2 and r ctl.3 to the fundamental data transceiver 1226 anal the supplemental data transceiver 1228, respectively, and outputs the control sigmals F ON2 and F
to the second and third switches 1236 and 1238, respectively, so that a path is desi~n.ated to receive data continuously on the forward fmdamental and supplemental channels. Then, the base station 1100 continuously tl-a~.~smits data on the designated forward fmdalnental and supplemental. channels to the terminal 1200.
Continuous reverse data co~.n:mw.~.ication from the terni.nal 1.200 to th.e base station 1100 The packet controller 1111 con tt-ols th.e packet control data hvansceiver to periodically transmit the control signal R SIGC to the packet controller 1222 of the terminal 1200 on the packet control charnel, and receives continuous data front the terminal. 1200 on reverse fundamelital and supplemental channels by outputting the control signals R-CT.L2 and R CTL3 to the fmdaniental data transceiver and tloe supplemental data transceiver 1117, respectively. In addition, in the presence of. data to be continuously transmitted to the base station 1100, the packet control.l.er 1.222 of the terminal 1200 outputs the control signals t ctl2 and t ctl3 to the fmdalnental data transceiver 1226 and the supplemental data transceiver 1.228, respectively, and th.e control signals OFF1, F OFF2, and F OFF3 to the first to third switches 1.234 to 1238. Then, th.e terminal 1200 continuously outputs data oli the reverse filndamental and supplemental channels. In the absence of data to be continuously transmitted to the base station 11.00, the packet controller 1.222 outputs the control signals OFF1 to OF.F3 to the .first to third switches 1.234 to 1238, respectively. Therefore, tile terminal 1200 transmits data continuously oli the designated reverse .fundamental and supplemental channels to the base station 1100.
Fol-ward voice colnmuni.cation from the base station 11.00 to the terminal.
The packet controller 11.11. of the base station 11.00 sends the control.
signal F SIGV to the packet controller 1222 of th.e tetm.inal 1200 by controlling the packet control data transceiver 1113 and outputs voice data on the forward .fmdamental chan~iel by outputting the control signal T CTL2 to the fundamental data transceiver 1.117. Upon receipt of the control signal F SIGV on the forward packet contt~ol channel, the packet coaltroller 1222 of the terminal 1200 outputs the control signals yctl2 to the fundamental data transceiver 1226, and the cont~~ol signals OFFI, F ON2, and OFF3 to the first to third switches 1234 to 1238, respectively.
Thus, the base station 1100 transmits th.e voice data on the forward fm~.damental chancel to the terminal 1.200.
Reverse voice communication ii~om the terminal 1200 to the base station The packet controller 1111 of the base station 1200 sends the conh~ol signal R-SIGV to the packet controller 1222 of tl.~e terminal 1200 on the packet control channel by controlluig th.e packet control data transceiver 1113 and designates a reverse i:undamental channel by outputti~.ig the control signal R-CTL2 to the fmdam.ental data transceiver 1117. Here, in th.e presence of voice data to be transmitted to th.e base station 1.1.00, the packet controller 1.222 of the base statio~i 1200 outputs the control sigmal t ctl2 to the fundamental data transceiver 1226 and designates the reverse fun.damen.tal channel by outputting the control signals OFF 1, F OFF2, anal OFF3 to the first to third switches 1234 to 1238, respectively.
Thus, the terminal 1200 outputs voice data on. th.e reverse fundamental channel to the base station 1.200.
As described above, the present invention may maximize channel resource use efficiency in a packet data service of a mobile communication network by introducing the packet control channel and the forward anal reverse packet traffic.
That i.s, the forward or reverse channels are occupied during a packet data transmissioWreception period after a call set-up, and are unoccupied during a packet data transmission/reception. suspended period, thereby enabling efficient use of channel capacity.
While the present invention has been described in detail with reference to the specif c em.bodinient, it is a mere exemplary application. Thus, it is to be clearly mderstood that matey variations can be made within the scope and spirit of the present invention. .en actually impletnenti.ng the packet data service as described above, the timing of. the packet control channel with respect to that of the packet traffic channel can be different from that as shown. i.n. FIGs. 9 and 10. For example, the i-th time slot of. the packet control channel may designate an (i+j)-th time slot of the packet traffic channel instead of the (i+l.)-th. time slot.
Claims (13)
1. A method for providing a forward packet data service of a base station having a forward packet traffic channel and a packet control channel in a CDMA (Code Division Multiple Access) communication system, comprising the steps of:
transmitting a packet control message via the packet control channel when generating a packet data to be transmitted in a packet idle state, the packet control message including information for assigning a slot period of the forward packet traffic channel and a terminal to be assigned the forward packet traffic channel;
occupying the forward packet traffic channel in the assigned slot period and transmitting the packet data via the occupied slot period of the forward packet traffic channel; and releasing the occupation of the forward packet traffic channel after transmitting the packet data and transitioning to the packet idle state.
transmitting a packet control message via the packet control channel when generating a packet data to be transmitted in a packet idle state, the packet control message including information for assigning a slot period of the forward packet traffic channel and a terminal to be assigned the forward packet traffic channel;
occupying the forward packet traffic channel in the assigned slot period and transmitting the packet data via the occupied slot period of the forward packet traffic channel; and releasing the occupation of the forward packet traffic channel after transmitting the packet data and transitioning to the packet idle state.
2. The method of claim 1, wherein the step of occupying the forward packet traffic channel assigns the forward packet traffic channel in the next slot period subsequent to the slot period, in which the assignment information is transmitted in the packet control.
3. A method for providing a forward packet data service of a terminal having a forward packet traffic channel and a packet control channel in a CDMA (Code Division Multiple Access) communication system, comprising the steps of:
checking terminal information of a packet control message received via the packet control channel in a packet idle state, the packet control message including information for assigning a slot period of the forward packet traffic channel and a terminal to be assigned the forward packet traffic channel;
occupying the forward packet traffic channel in the assigned slot period and receiving the packet data via the occupied slot period of the forward packet traffic channel, when assigning said terminal itself in the packet control message; and releasing the occupation of the forward packet traffic channel after receiving the packet data and transitioning to the packet idle state.
checking terminal information of a packet control message received via the packet control channel in a packet idle state, the packet control message including information for assigning a slot period of the forward packet traffic channel and a terminal to be assigned the forward packet traffic channel;
occupying the forward packet traffic channel in the assigned slot period and receiving the packet data via the occupied slot period of the forward packet traffic channel, when assigning said terminal itself in the packet control message; and releasing the occupation of the forward packet traffic channel after receiving the packet data and transitioning to the packet idle state.
4. The method of claim 3, wherein the terminal assigns the forward packet traffic channel in the next slot period subsequent to the slot period in which the information of the forward tragic channel is transmitted in the packet control channel in the step of the forward packet traffic channel occupation.
5. A method for providing a reverse packet data service of a base station having a reverse packet traffic channel and a packet control channel in a CDMA (Code Division Multiple Access) communication system, comprising the steps of:
transmitting a packet control message via the packet control channel in a packet idle state, the packet control message including information for assigning a slot period of the reverse packet traffic channel and a terminal to be assigned the reverse packet traffic channel;
occupying the reverse packet traffic channel in the assigned slot period and receiving the packet data via the occupied slot period of the reverse packet traffic channel; and releasing the occupation of the reverse packet traffic channel after receiving the packet data and transitioning to the packet idle state.
transmitting a packet control message via the packet control channel in a packet idle state, the packet control message including information for assigning a slot period of the reverse packet traffic channel and a terminal to be assigned the reverse packet traffic channel;
occupying the reverse packet traffic channel in the assigned slot period and receiving the packet data via the occupied slot period of the reverse packet traffic channel; and releasing the occupation of the reverse packet traffic channel after receiving the packet data and transitioning to the packet idle state.
6. The method of claim 5, wherein the step of transmitting information assigning the slot period of the reverse packet traffic channel further transmits the power control information for controlling the transmitting power level of the terminal assigned in the packet control channel.
7. The method of claim 5, wherein the reverse packet traffic channel is assigned in the next slot period subsequent to the slot period in which the assignment information is transmitted in the packet control channel in the step of the reverse packet traffic channel assignment.
8. A method for providing a reverse packet data service of a terminal having a reverse packet traffic channel and a packet control channel in a CDMA (Code Division Multiple Access) communication system, comprising the steps of checking terminal information of a packet control message received via a packet control channel in a packet idle state, the packet control message including information for assigning a slot period of the reverse packet traffic channel and a terminal to be assigned the reverse packet traffic channel;
occupying the reverse packet traffic channel in the assigned slot period and transmitting the packet data via the occupied slot period of the reverse packet traffic channel; and releasing the occupation of the reverse packet traffic channel after transmitting the packet data and transitioning to the packet idle state.
occupying the reverse packet traffic channel in the assigned slot period and transmitting the packet data via the occupied slot period of the reverse packet traffic channel; and releasing the occupation of the reverse packet traffic channel after transmitting the packet data and transitioning to the packet idle state.
9. The method of claim 8, wherein the step of transmitting the packet data further comprises controlling transmitting the power of the packet data to be transmitted by a power control command received from the packet control channel.
10. An apparatus for providing a forward packet data service of a base station in a CDMA communication system, comprising:
a packet control channel transmitter for transmitting a packet control message;
a forward packet traffic channel transmitter for transmitting a packet data to a designated terminal in an assigned slot period; and a base station packet controller for generating the packet control message when generating the packet data to be transmitted in a packet idle state, said packet control message including information for assigning the slot period of the forward packet traffic channel and the terminal to be assigned the forward packet traffic channel, assigning the forward packet traffic channel in the assigned slot period, releasing the assigned forward packet traffic channel after transmitting the packet data and transitioning to the packet idle state.
a packet control channel transmitter for transmitting a packet control message;
a forward packet traffic channel transmitter for transmitting a packet data to a designated terminal in an assigned slot period; and a base station packet controller for generating the packet control message when generating the packet data to be transmitted in a packet idle state, said packet control message including information for assigning the slot period of the forward packet traffic channel and the terminal to be assigned the forward packet traffic channel, assigning the forward packet traffic channel in the assigned slot period, releasing the assigned forward packet traffic channel after transmitting the packet data and transitioning to the packet idle state.
11. An apparatus for providing a forward packet data service of terminal in a CDMA communication system, comprising:
a packet control channel receiver for receiving a packet control message;
a forward packet traffic channel receiver for receiving a packet data in an assigned slot period; and a terminal packet controller for checking terminal information of the packet control message received via the packet control channel in a packet idle state, said the packet control message including information for assigning the slot period of the forward packet traffic channel and a terminal to be assigned the forward packet traffic channel, assigning the forward packet traffic channel in the assigned slot period when designating said terminal itself in the packet control message, releasing the assigned forward packet traffic channel after receiving the packet data and transitioning to the packet idle state.
a packet control channel receiver for receiving a packet control message;
a forward packet traffic channel receiver for receiving a packet data in an assigned slot period; and a terminal packet controller for checking terminal information of the packet control message received via the packet control channel in a packet idle state, said the packet control message including information for assigning the slot period of the forward packet traffic channel and a terminal to be assigned the forward packet traffic channel, assigning the forward packet traffic channel in the assigned slot period when designating said terminal itself in the packet control message, releasing the assigned forward packet traffic channel after receiving the packet data and transitioning to the packet idle state.
12. An apparatus for providing a reverse packet data service of a base station in a CDMA communication system, comprising:
a packet control channel transmitter for transmitting a packet control message;
a reverse packet traffic channel receiver for receiving a packet data transmitted from a designated terminal in an assigned slot period; and a base station packet controller for generating the packet control message when generating the packet data to be transmitted in a packet idle state, said packet control message including information for assigning the slot period of the reverse packet traffic channel and the terminal to be assigned the reverse packet tragic channel, assigning the reverse packet traffic channel in the assigned slot period, releasing the occupation of the reverse packet traffic channel after receiving the packet data and transitioning to the packet idle state.
a packet control channel transmitter for transmitting a packet control message;
a reverse packet traffic channel receiver for receiving a packet data transmitted from a designated terminal in an assigned slot period; and a base station packet controller for generating the packet control message when generating the packet data to be transmitted in a packet idle state, said packet control message including information for assigning the slot period of the reverse packet traffic channel and the terminal to be assigned the reverse packet tragic channel, assigning the reverse packet traffic channel in the assigned slot period, releasing the occupation of the reverse packet traffic channel after receiving the packet data and transitioning to the packet idle state.
13. An apparatus for providing a reverse packet data service of a terminal in a CDMA communication system, comprising:
a packet control channel receiver for receiving a packet control message;
a reverse packet traffic channel transmitter for transmitting a packet data in an assigned slot period;
a terminal packet controller for checking terminal information of the packet control message received via the packet control channel in a packet idle state, said packet control message including information for assigning the slot period of the reverse packet traffic channel and a terminal to be assigned the reverse packet traffic channel, assigning the reverse packet traffic channel in the assigned slot period when designating said terminal itself in the packet control message, releasing the assigned reverse packet traffic channel after transmitting the packet data and transitioning to the packet idle state.
a packet control channel receiver for receiving a packet control message;
a reverse packet traffic channel transmitter for transmitting a packet data in an assigned slot period;
a terminal packet controller for checking terminal information of the packet control message received via the packet control channel in a packet idle state, said packet control message including information for assigning the slot period of the reverse packet traffic channel and a terminal to be assigned the reverse packet traffic channel, assigning the reverse packet traffic channel in the assigned slot period when designating said terminal itself in the packet control message, releasing the assigned reverse packet traffic channel after transmitting the packet data and transitioning to the packet idle state.
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR34919/1997 | 1997-07-25 | ||
| KR19970034919 | 1997-07-25 | ||
| KR1019980001476A KR100277098B1 (en) | 1997-07-25 | 1998-01-13 | Packet data service device and emthod wireless communcation system |
| KR1476/1998 | 1998-01-13 | ||
| JP19685898A JP3593458B2 (en) | 1997-07-25 | 1998-07-13 | Packet data service method for communication system |
| CN98117834A CN1128556C (en) | 1997-07-25 | 1998-07-14 | Packet data service providing method in communication system |
| GB9815204A GB2339645B (en) | 1997-07-25 | 1998-07-14 | A communication system providing a packet data service |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2242296A1 CA2242296A1 (en) | 1999-01-25 |
| CA2242296C true CA2242296C (en) | 2004-02-17 |
Family
ID=27509663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002242296A Expired - Fee Related CA2242296C (en) | 1997-07-25 | 1998-07-06 | Method and apparatus for providing packet data service in a communication system |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP3593458B2 (en) |
| CN (1) | CN1128556C (en) |
| BR (1) | BR9802473A (en) |
| CA (1) | CA2242296C (en) |
| GB (1) | GB2339645B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW459461B (en) * | 1999-01-16 | 2001-10-11 | Koninkl Philips Electronics Nv | Radio communication system |
| EP1190496B1 (en) | 2000-02-17 | 2004-10-27 | Samsung Electronics Co., Ltd. | Apparatus and method for assigning a common packet channel in a cdma communication system |
| GB2366135B (en) | 2000-08-09 | 2004-06-23 | Airspan Networks Inc | Transfer of data packets in a wireless telecommunications system |
| KR100469711B1 (en) * | 2001-01-18 | 2005-02-02 | 삼성전자주식회사 | Apparatus and method for controlling reverse transmission in mobile communication system |
| US20030040315A1 (en) * | 2001-08-20 | 2003-02-27 | Farideh Khaleghi | Reduced state transition delay and signaling overhead for mobile station state transitions |
| US7103021B2 (en) | 2001-09-25 | 2006-09-05 | Qualcomm Incorporated | Method and apparatus for communications of data rate control information in a CDMA communication system |
| KR100547881B1 (en) * | 2001-12-20 | 2006-02-01 | 삼성전자주식회사 | Mode transition method of mobile station for wireless data service |
| EP1618716A1 (en) * | 2003-04-23 | 2006-01-25 | Telecom Italia S.p.A. | A client-server system and method thereof for providing multimedia and interactive services to mobile terminals |
| US8175031B2 (en) | 2004-11-18 | 2012-05-08 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for supporting packet data services in service area boundary regions |
| US8953596B2 (en) | 2006-01-06 | 2015-02-10 | Qualcomm Incorporated | Conserving network capacity by releasing QoS resources |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0615393A1 (en) * | 1993-03-10 | 1994-09-14 | Motorola, Inc. | A method for packet data transmission on a cellular voice network |
| US5790551A (en) * | 1995-11-28 | 1998-08-04 | At&T Wireless Services Inc. | Packet data transmission using dynamic channel assignment |
| FI101920B1 (en) * | 1996-06-07 | 1998-09-15 | Nokia Telecommunications Oy | Channel reservation method for packet network |
| KR100338662B1 (en) * | 1998-03-31 | 2002-07-18 | 윤종용 | Apparatus and method for communication channel in a cdma communication system |
-
1998
- 1998-07-06 CA CA002242296A patent/CA2242296C/en not_active Expired - Fee Related
- 1998-07-13 BR BR9802473A patent/BR9802473A/en not_active IP Right Cessation
- 1998-07-13 JP JP19685898A patent/JP3593458B2/en not_active Expired - Fee Related
- 1998-07-14 GB GB9815204A patent/GB2339645B/en not_active Expired - Fee Related
- 1998-07-14 CN CN98117834A patent/CN1128556C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2242296A1 (en) | 1999-01-25 |
| JP3593458B2 (en) | 2004-11-24 |
| GB2339645A (en) | 2000-02-02 |
| GB9815204D0 (en) | 1998-09-09 |
| CN1241878A (en) | 2000-01-19 |
| GB2339645B (en) | 2003-01-15 |
| JP2000050352A (en) | 2000-02-18 |
| BR9802473A (en) | 1999-06-15 |
| CN1128556C (en) | 2003-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2257203C (en) | Medium access control scheme for data transmission on code division multiple access (cdma) wireless systems | |
| US5150362A (en) | Beacon carrier | |
| US6233461B1 (en) | Method and apparatus for group calls in a wireless CDMA communication system | |
| US6970438B2 (en) | Method and device for downlink packet switching | |
| JP4376515B2 (en) | Mobile communication system | |
| US5553074A (en) | Transmission format in packet based communications | |
| CN100365948C (en) | UTRA TDD time slots allocation | |
| KR20030012786A (en) | Method and apparatus for group calls in a wireless cdma communication system | |
| JPH11285059A (en) | Data communication method between base station and mobile terminal in mobile communication system | |
| CA2242296C (en) | Method and apparatus for providing packet data service in a communication system | |
| US6510145B1 (en) | Method and apparatus for providing packet data service in a communication system | |
| EP0997010B1 (en) | Method and apparatus for group calls in a wireless cdma communication system | |
| RU2000107796A (en) | METHOD FOR CHANGE THE FREQUENCY OF THE CARRIER CHANNEL OF BROADCASTING WITHOUT DISTURBING THE TRAFFIC OF INPUT CALLS | |
| EP0569562B1 (en) | Method for radio channel allocation | |
| KR101317996B1 (en) | Method and apparatus for transmiting data between nodes in a mesh network | |
| KR100321785B1 (en) | Method for Transmitting and Receiving Packet Traffic in a Wireless Packet Data Network | |
| KR100326324B1 (en) | Method for controlling gated transmission of dedicated channel signal in w-cdma communication system | |
| KR20010038059A (en) | Method for Broadcasting service | |
| KR100277098B1 (en) | Packet data service device and emthod wireless communcation system | |
| JPH04145733A (en) | In-zone communication system in mobile communication | |
| JP4020827B2 (en) | BASE STATION DEVICE, BASE STATION DEVICE CONTROL METHOD, AND BASE STATION DEVICE CONTROL PROGRAM | |
| KR100326565B1 (en) | Multi-code establishing method in wireless local loop system | |
| JPH02158223A (en) | Radio communication control system | |
| JP3055996B2 (en) | Press talk communication control method for digital mobile radio communication system | |
| KR100857788B1 (en) | Method for transition from Control Hold Mode to Active Mode in packet data system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |