CN1636344A - A communication system that provides access queuing for communication services - Google Patents
A communication system that provides access queuing for communication services Download PDFInfo
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- CN1636344A CN1636344A CN01811692.2A CN01811692A CN1636344A CN 1636344 A CN1636344 A CN 1636344A CN 01811692 A CN01811692 A CN 01811692A CN 1636344 A CN1636344 A CN 1636344A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
- H04W28/14—Flow control between communication endpoints using intermediate storage
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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Abstract
This invention relates to the field of mobile communications. More particularly, this invention is a method and apparatus for providing communication services to mobile devices over wireless asynchronous connectionless links. A communication system provides communication services used by a plurality of mobile devices (12). A host processor (302) manages wireless service acces to the mobile devices (12) over one or more communication links. A link manager (202) manages the links in response to commands from the host processor (302). The communication system includes an access queue (306) that queues service access requests from a group of mobile devices (303). The host processor (302) grants and terminates service access to the mobile devices (12) in the group of mobile devices (303) based on a predefined access policy that, for example, corresponds to the attributes of a service type and/or a subscription to the service by the user.
Description
Invention field
The present invention relates generally to field of wireless communications, specifically, relate to the communication system that communication service is provided to mobile device.
Background technology
We know that communication system provides service by wireless link.Wherein a kind of Bluetooth system had both been supported asynchronous, supported synchronous service again, and this service is by point-to-point, or the communication linkage of point-to-multipoint, offers mobile device.In the standard of bluetooth, service discovery protocol (ServiceDiscovery Protocol) (SDP) has defined to be used to locate by system and provides, or the process by the operable available service of system.More particularly, SDP provides the device that is used for running on the client applications on the mobile device, with the existence of the service finding to be provided by server application and the attribute of these services.The attribute of service the type or the class of the service that is provided is provided and uses the required mechanism of service and the information of agreement.
In order to provide point-to-point, or the communication linkage of point-to-multipoint, bluetooth has been used circuit switching and packet technology with mixing.Point-to-point connection is only shared between two mobile devices that can use bluetooth, and being connected between a plurality of mobile devices of point-to-multipoint shared.Bluetooth can be supported from an asynchronous data channel, to three concurrent simultaneous voice channels of as many as, or supports asynchronous data and simultaneous voice channel simultaneously.
In the standard of bluetooth, two or more mobile devices of sharing same channel form a pico-network network, and a plurality of pico-network networks with overlapping area coverage form a distribution network (scatternet).Mobile device is as the main equipment of this pico-network network, and other mobile device is as from (slave) equipment.Therefore, each pico-network network has only a main equipment.Yet slave unit can add different pico-network networks based on time division multiplexing.In addition, the main equipment in a pico-network network can be the slave unit in another pico-network network.
The communication resource in the Bluetooth system can be supported the many slave units to seven activation in the pico-network network.Yet sometimes, the quantity of the Bluetooth mobile equipment of request access system service may surpass the quantity of available communication resource in the system.We know can be between the equipment (for example, processing unit) of some shared communication resource (such as radio-frequency channel or bus bandwidth).In order to transmit data, use fair rule common share communication bus bandwidth between a plurality of processors.Be known that conventional multitask computer system equally between a plurality of application programs, with the shared Limited resources of synchronous or asynchronous mode.In general, (such as Windows NT) is designed to according to predefined rule with multiple task operating system, shares the disposal ability of one or more processing units.For example, when in single channel or multichannel processing environment, in the one or more application programs of operation, operating system may be the application assigned disposal ability in a looping fashion in Windows NT, and the chance of the access process resource of equalization is provided for each application program.Be known that equally distribution to this resource is based on the priority of application program.Should be noted in the discussion above that shared processing ability between application program, or between treatment facility the conventional computer system of shared bus bandwidth, do not interrupting Any Application, or abandoning just Resources allocation under the situation of the transfer of data of carrying out on the bus.
Because the ability that Bluetooth system in the connection that it is supported, can only provide limited accessing communication to serve, so the state that system allows the part slave unit " to suspend (parked) " with a kind of being referred to as keeps the locking to main equipment.The slave unit that suspends can not activate on channel, but keeps synchronously with main equipment.For activate with the slave unit that suspends, channel access is all controlled by main equipment.Under this arrangement, in case the communication resource of system can be used, just activate the mobile device that suspends, with visit institute requested service.Yet the right that the mobile device that suspends is provided by the service that is provided has been deprived in this arrangement, till it is activated.Therefore, neededly be, with a kind of mode that allows mobile device to utilize available service, the available communication resource of distributing this system or similar system
Description of drawings
Fig. 1 is to use the block diagram of exemplary system of the present invention.
Fig. 2 is the block diagram of the resource discovering agreement (SDP) used in the system shown in Fig. 1.
Fig. 3 is the block diagram of the network access point that moves among the present invention.
Fig. 4 is used to mobile device that the flow chart of the method for service access is provided among the present invention.
Embodiment
In the present invention, a plurality of mobile devices are by the service that is provided is provided on the communication system.Host-processor connects the service access of link management to mobile device by one or more wireless asynchronous nothings.The link manager response is managed one or more wireless asynchronous nothings and is connected link from the order of host-processor.System among the present invention comprises access queue, and it will be from the service access request queuing of one group of mobile device.Host-processor sends the order of authorizing or stopping the service access of whole or each mobile device in one group of mobile device according to predefined access strategy.For example, predefined access strategy may be corresponding to type service, and/or the attribute of user's service of subscribing.
According to some more detailed features among the present invention,, stop a mobile device in one group of mobile device to the visit of ongoing service according to predefined access strategy.For example, when mobile device request service access in one group of mobile device, ask the priority of the response of service according to distributing to, authorize request.If the response for the request service has distributed the priority that is higher than ongoing service, ongoing service just may stop, thereby response just may be mail to the mobile device communication of filing a request according to the priority of being distributed.Afterwards, according to predefined service recovery strategy, can continue to carry out to being terminated the service access of service.
According to other more detailed feature among the present invention, mobile device both can be in access queue the Request Priority state, again can RQ cycle ground obtain the notice of their priority in access queue.Furtherly, when other mobile device in the access queue was being accepted to serve, mobile device can obtain the notice about service availability.
Another aspect of the present invention relates to a kind of accessing communication service method that is used for, and this communication service need receive the service access request from one group of mobile device.The access request that is received is lined up, and according to predefined access strategy, authorizes all mobile devices in one group of mobile device with service access.According to predefined end of service strategy, mobile device and according to predefined recovery policy, continues to carry out the ongoing service that has been terminated to the visit of ongoing service in the termination group.
At least a strategy in predefined access strategy, end of service strategy and the predefined service recovery strategy is the communication linkage resource that depends on communication system, for example, and the available communication channel of system.In one exemplary embodiment, radio communication channel comprises the time gap of the predefine quantity in the time frame of radio-frequency channel.Furtherly, at least a strategy in predefined access strategy, end of service strategy and the predefined service recovery strategy is corresponding to the COS attribute, and/or the attribute of user's booking service.
With reference to figure 1, wherein shown and used system 10 of the present invention valuably.Optimum system choosing of the present invention ground provides the communication network operation of wired or wireless link by the one or more mobile devices 12 in the coverage 14.Internet 16 provides a kind of such wire communication link, and the internet is the whole world that forms by the set of interconnecting of connecting together of a series of standard agreement (such as WAP, or TCP/IP) (public and/or privately owned) network, distributed network.In such a way, ISP's server 26 can pass through internet 16, and different mobile device services is provided.Can use support to define the different radio link 17 of agreement in conjunction with the present invention.The example of this agreement comprises those agreements by bluetooth, IEEE802.11, GSM, IS-136 and IS-95 definition.
In a preferred embodiment, as disclosed in (here add as a reference) Bluetooth system (v1.B1999 December 1) standard, system 10 is based on that Bluetooth system realizes.Although can well understand Bluetooth technology, necessary extended description is carried out in the operation of such system, so that those of ordinary skill in the art can make and use the present invention.In general, Bluetooth system provides short-range wireless link on unwarranted (unlicensed) ISM frequency band, in this frequency band, information communicates so that 1Ms/s information code element speed to be provided by using the frequency modulation(FM) of shaping (shaped) binary system.Bluetooth system uses the time slot channel of time slot form.On each channel, information exchanges by the grouping of launching on different frequency hoppings.A grouping covers a time slot usually, covers five time slots of as many as but also can expand to.
As shown in Figure 1, system 10 comprises wireless module 18, link controller 20 and through the url management device 22 of console controller 24 interfaces, and link manager 22 is through by host controller interface (HCI) and url management device 22 interfaces.Wireless module 18 moves in the frequency band of 2.4GHz, with the physical medium that provides mobile device 12 to communicate by letter usefulness with system 10.The width of frequency band is 83.5MHz, and it comprises 79 1MHz RF channel at interval each other.Each channel is represented by the pseudo-random hopping preface preface that covers these 79 RF channels.Frequency hop sequences is unique for each pico-network network, and is to be determined by the device address of corresponding master device, and with the phase place of the clock setting frequency hop sequences of main equipment.
Link controller 20 is carried out baseband protocol and other low layer link route, and comprises execution Base-Band Processing and managing physical layer protocol, and the hardware and software part of ARQ agreement and FEC coding.The link that link controller 20 controls are two types: towards connecting (SCO) link, be connected (ACL) link with asynchronous nothing synchronously.Usually the SCO link of supporting bounded time (time-bounded) information resemble voice is point-to-point connection between main equipment and the single slave unit in the pico-network network.Main equipment can safeguard that three SCO with same slave unit of as many as link, or exchanges connect at interval conventional with different slave units to form similar circuit, uses the SCO of reserved time slot (reserved slots) to link.Slave unit can be supported three SCO links from identical main equipment of as many as, if perhaps link comes from different main equipments, then supports two such SCO links.Because SCO is a synchronization links, so their not support package transmissions.
Comparatively speaking, the ACL link is the link of the point-to-multipoint of support package emission.The ACL link builds on main equipment and adds between all slave units of this pico-network network.Be not in the time slot that keeps for the SCO link, main equipment can be established to the ACL link of any slave unit (comprising a plurality of slave units of setting up the SCO link) based on each time slot (per-slot basis).Yet, between main equipment and slave unit, can only have an ACL link.The ACL bag that is not imparted to certain specific slave unit address is counted as broadcast packet, and it is read by each slave unit.
Console controller 24 is by host controller interface (HCI) and link manager 22 interfaces.HCI is provided to the command interface of link manager 22 and the visit of arriving hardware state and control register.HCI is the subclass of console controller 24, and is responsible for and the communicating by letter of link manager 22.By using the HCI firmware (firmware) 25 as the part of console controller 24, this interface provides a kind of method of unified visit baseband capability.HCI firmware 25 realizes the HCI order for system hardware by the order of visit base band, link management order, hardware status register, control register and event registers.
Console controller 24 utilizes by the business in the link policy order management local network of HCI control.Local network can be (for example) bluetooth pico-network network, and/or distribution network.Use other example of local network of the present invention to comprise those networks by (adding as a reference) ieee standard 802.11 defineds at this.May there be a lot of layers between the HCI driving of main frame 24 and the HCI firmware 25 in system hardware.These intermediate layers are called the host computer control transport layer to be understood under these data conditions not needing, and the ability of transmission data is provided.The HCI incident is used for when thing takes place, notice host-processor 24.In case host-processor finds that event occurs, it is just analyzed the incident bag that receives, to judge the character of generation incident.For example, host-processor 24 uses the HCI incident to detect the service request that mobile device 12 generates.
With reference to figure 2, this is a block diagram of supporting the service discovery protocol in the system that Fig. 1 describes.SDP is supported by ISP 26, its operation suitable servers application program, and the corresponding client applications of mobile device 12 operations.SDP has defined to be used to locate by the ISP and provides, or by the ISP and the agreement of operable available service.SDP provides for the server application of finding with by pack into the attribute of these services of service log of client applications.For providing service in an embodiment of the present invention, mutual communication between SDP server 202 and the mobile SDP client applications 204.
SDP server 202 is safeguarded a series of service logs 208 of describing the service features relevant with this server uniquely.In such a way, mobile client can be by issue SDP or customer service request 212, with the information of the service log that recovers free SDP server maintenance.When carrying out SDP service and search request, the SDP service searches the request response and returns with SDP or service response 214, provide all available service that the pattern that searches that provides in the request is provided to tabulate, single equipment both can be used as the SDP server, can be used as the SDP client again.If a plurality of application programs on the equipment provide service, the SDP server is handled the relevant information request of service that is provided with them just as these service providers.Similarly, a plurality of client applications can use the SDP client, with the nominal request server of client applications.
The set of the SDP server that SDP client can use can dynamically change based on the RF of server and user's degree of closeness.When server becomes available, must notify potential client by the device that is different from SDP, the user just can be with SDP to its service of server requests thus.Similarly, when server leaves adjacent domain, or because certain is former thereby when becoming disabled, the obvious notice by service discovery protocol not then.Yet the client can use SDP to the server poll, and at server no longer in the response request, the inference service device is unavailable.
With reference to figure 3, this is the block diagram of the system that moves in the present invention.Host-processor 302 uses the link policy orders, and by accessing points 304, control is to the service access of the mobile device 12 of forming pico-network network 303 (or form distribution network with other mobile device).In the exemplary embodiment, accessing points 304 comprises the HCI among wireless module 18, link controller 20, link manager 22 and Fig. 1.According to the state of the mobile device 12 in the pico-network network 303 (or distribution network), host-processor 302 can the link policy order be set to different patterns.Adopt the pattern of (imposed) to influence the mode of link management management pico-network network by host-processor 302.Pattern can be that (for example) keeps pattern (hold mode), olfactory modality (sniff mode) and park mode (park mode).Host-processor 302 uses I/O 308 and internet 16 interfaces by well-known interface (such as Ethernet).Host-processor is controlled accessing points 304 and wireless module also by physical interface 310 (such as USB).
Because the pico-network network can only be supported the mobile device of limited quantity, the present invention uses access queue 306 (being fifo queue in the exemplary embodiment) that the mobile device that surpasses the number of devices that is allowed in the pico-network network is ranked.For example, if equipment 12 generates access request on ACL, host-processor 302 detects this incident, and this equipment is placed the tail of the queue of access queue 306, and here, equipment enters park mode.Park mode is a low energy consumption state, and at this moment halt device does not add the pico-network network, but maintenance and pico-network network is synchronous.When being in park mode, mobile device 12 was activated in the interval a blink that is called as beacon moment (beacon instant).In moment, can authorize the visit of equipment at this beacon by broadcast singal from the main equipment in the pico-network network to the pico-network network.
After equipment placed park mode, main frame 302 was just judged the quantity of activated equipment in the pico-network network.If the number of devices in the pico-network network does not surpass the number of devices that is allowed, host-processor 302 just startup is called the link policy order of withdrawing from park mode.Withdraw from the park mode order equipment is switched to enable mode from park mode, enable mode permission equipment adds pico-network network 303.Host-processor 302 increases progressively internal register then, to safeguard the counting of activated equipment quantity in the pico-network network 303.Describe by the connection of the park mode of stipulating in the Bluetooth specification although should be appreciated that the present invention, also can carry out the icotype of other standard (such as IEEE 802.11) defined in the present invention.
In the present invention, if the quantity of the equipment 12 in the pico-network network has surpassed the number of devices that is allowed, host-processor 302 has been just according to having defined the predefine access strategy that stops and continue the condition of ongoing service, authorizes the service access to all mobile devices in 12 groups of the mobile devices.In one exemplary embodiment, the predefine access strategy may depend on the communication linkage resource of system, for example, and the quantity of available wireless communication channel.As mentioned above, in bluetooth applications of the present invention, radio communication channel comprises the time slot of the predetermined quantity predetermined quantity in the radio-frequency channel time frame.
In another embodiment, predefined access strategy is corresponding to the attribute of COS.For example, user's award service of subscribing just may be than the priority height of the basic service of user's reservation.According to this arrangement, a mobile device in 12 groups of the mobile devices may be terminated based on predefined access strategy the visit of ongoing service.As mentioned above, access strategy has defined termination and has continued ongoing service manner (term) after a while.Therefore, the service of termination may also depend on predefined end of service strategy, and according to it, issue stops service from the order of host-processor.Similarly, continue in service that the predefine service continues in the strategy, this policy control host-processor issue is used to the order of the service that continues to be terminated.Therefore, a feature in according to the present invention according to predefined service recovery strategy, continues the service access to the ongoing service that is terminated.End of service and continuation strategy itself may depend on the communication linkage resource, or the COS attribute, or user's independently of one another reservation.
In another embodiment, ask the priority of the response of service according to distributing to, authorize in one group of mobile device a mobile device and institute is asked the visit of serving.For example, the user of the Flight Information that leaves the port if desired is with the Flight Information service on device request visit airport, may have the priority higher than the access request of other service to the response of this access request.According to this arrangement, each mobile device can request queue in corresponding priority level.In response, the periodically notified priority that they are asked in formation of mobile device.In another embodiment, other mobile device in access queue is accepted after the service, the availability of the mobile device of notice service.
Fig. 4 has described accessing communication service method among the present invention.This method need receive from the service access request of one group of mobile device (square frame 410).The service access request that receives is according to top said method line up in access queue (square frame 420).According to predefined access strategy, authorize service access (square frame 430) to all mobile devices in one group of mobile device.According to predefined end of service strategy, can stop offering the ongoing service (square frame 440) of one or more mobile devices in one group of mobile device, and, continue this service (square frame 450) after a while according to predefined recovery policy.
Can see that from the foregoing description the present invention has become easily the accessing communication service by providing these services according to the service access strategy.Can work out the service access strategy in order to satisfy different service application demands.For example, according to the real needs that are provided at such as local communication service such as airport, park, megastore, can work out access strategy in order to meet consumers' demand, like this, when number of users surpasses the maximum communication restriction, can not deprive the visit of user to service.
Claims (18)
1. a communication system provides the communication service that a plurality of mobile devices are used to conduct interviews by one or more wireless asynchronous connectionless links, and this communication system comprises:
Connect the host-processor of link by described one or more wireless asynchronous nothings to the wireless service visit of described mobile device;
Response is managed the link manager that described one or more wireless asynchronous nothing connects link from the order of described host-processor; With
The access queue that to rank from the service access request of one group of mobile device, wherein, service access is authorized or stopped to described host-processor according to predefined access strategy.
2. according to communication system described in the claim 1, wherein said predefined access strategy depends on the communication linkage resource of described communication system.
3. according to communication system described in the claim 2, wherein said communication linkage resource comprises radio communication channel.
4. according to communication system described in the claim 3, wherein said radio communication channel is included in the time slot of the predefine quantity in the time frame of radio-frequency channel.
5. according to communication system described in the claim 1, wherein said predefined access strategy is corresponding to described COS attribute.
6. according to communication system described in the claim 1, wherein said predefined access strategy is corresponding to the attribute of the service of described user's reservation.
7. according to communication system described in the claim 1, wherein stop the visit of ongoing service according to predefined end of service strategy.
8. according to communication system described in the claim 7,, recover service access to the described ongoing service that is terminated wherein according to predefined recovery policy.
9. according to communication system described in the claim 1,, authorize visit to one in described one group of mobile device described mobile device institute requested service wherein according to distributing to the priority of institute being asked the response of serving.
10. according to communication system described in the claim 1, wherein mobile device is asked its priority in described access queue.
11., wherein its priority is periodically notified the mobile device in described access queue according to communication system described in the claim 1.
12. according to communication system described in the claim 1, wherein other mobile device in described access queue has been accepted after the service, the availability of notice mobile device service.
13. one kind is used for connecting the method that link provides communication service by one or more wireless asynchronous nothings, it comprises:
Receive service access request from one group of mobile device;
To rank from the service access request of described one group of mobile device;
According to predefined access strategy, authorize service access to all mobile devices in described one group of mobile device;
According to predefined end of service strategy, stop a described mobile device in described one group of mobile device to the visit of ongoing service; With
According to predefined recovery policy, recover the described ongoing service that is terminated.
14. according to method described in the claim 13, at least a strategy in wherein said predefined access strategy, end of service strategy and the predefined recovery policy depends on the communication linkage resource of described communication system.
15. according to method described in the claim 14, wherein said communication linkage resource comprises the wireless link channel.
16. according to method described in the claim 15, wherein said wireless link channel is included in the predefine quantity in the time slot in the time frame of radio-frequency channel.
17. according to method described in the claim 13, at least a strategy in wherein said predefined access strategy, end of service strategy and the predefined recovery policy is corresponding to the attribute of described COS.
18. according to method described in the claim 13, at least a strategy in wherein said predefined access strategy, end of service strategy and the predefined recovery policy is corresponding to the attribute of the service of described user's reservation.
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| US60233800A | 2000-06-24 | 2000-06-24 | |
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| CN1636344A true CN1636344A (en) | 2005-07-06 |
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| AU (1) | AU2001268652A1 (en) |
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| US9271238B2 (en) | 2013-01-23 | 2016-02-23 | Seven Networks, Llc | Application or context aware fast dormancy |
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|---|---|---|---|---|
| US5483524A (en) * | 1994-05-09 | 1996-01-09 | Lev; Valy | Method for transmitting data packets via a circuit-switched channel |
| US5787080A (en) * | 1996-06-03 | 1998-07-28 | Philips Electronics North America Corporation | Method and apparatus for reservation-based wireless-ATM local area network |
| US6151319A (en) * | 1996-11-15 | 2000-11-21 | Lucent Technologies Inc. | Connectionless message service using ATM routers |
| US5903559A (en) * | 1996-12-20 | 1999-05-11 | Nec Usa, Inc. | Method for internet protocol switching over fast ATM cell transport |
| JP3649367B2 (en) * | 1997-09-26 | 2005-05-18 | ソニー株式会社 | Packet transmission control method and apparatus |
| US6252862B1 (en) * | 1999-05-20 | 2001-06-26 | Motorola, Inc. | Method and apparatus for routing packet data in a communications system |
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2001
- 2001-06-21 CN CN01811692.2A patent/CN1636344A/en active Pending
- 2001-06-21 WO PCT/US2001/019860 patent/WO2002001836A2/en not_active Application Discontinuation
- 2001-06-21 EP EP01946631A patent/EP1303926A2/en not_active Withdrawn
- 2001-06-21 AU AU2001268652A patent/AU2001268652A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102948206A (en) * | 2010-04-30 | 2013-02-27 | 诺基亚公司 | Method and apparatus for providing mobile services outside of cellular coverage |
| CN106357561A (en) * | 2015-07-16 | 2017-01-25 | 谷歌公司 | Access port queuing and resource management |
| CN106357561B (en) * | 2015-07-16 | 2021-09-07 | 谷歌有限责任公司 | Access port queuing and resource management |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1303926A2 (en) | 2003-04-23 |
| WO2002001836A3 (en) | 2002-07-25 |
| WO2002001836A2 (en) | 2002-01-03 |
| AU2001268652A1 (en) | 2002-01-08 |
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