CN1083229C - Radio control signal transmission method for personal digital radio communication system - Google Patents
Radio control signal transmission method for personal digital radio communication system Download PDFInfo
- Publication number
- CN1083229C CN1083229C CN96107324.1A CN96107324A CN1083229C CN 1083229 C CN1083229 C CN 1083229C CN 96107324 A CN96107324 A CN 96107324A CN 1083229 C CN1083229 C CN 1083229C
- Authority
- CN
- China
- Prior art keywords
- channel
- base station
- control
- time slot
- control channel
- 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
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/72502—Cordless telephones with one base station connected to a single line
- H04M1/72505—Radio link set-up procedures
- H04M1/72508—Radio link set-up procedures using a control channel
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A base station of a cordless telephone system or personal handy phone system (PHS) monitors time slots on control channels and transmits control information on a time slot of a channel that it determines to be free. This is then used as the selected control channel of that base station. The monitoring and selecting procedure is necessarily carried out when the base station is switched on and preferably at predetermined intervals or when a call set up fails. The procedure may alternatively be carried out at a cordless telephone handset.
Description
The present invention relates to the radio control signal transmission method of the personal digital radio communication system formed by a travelling carriage with the base station of electronic communication circuit device wired connection.
In cordless telephone generation 2 system (personal handyphone system), as the example that the digital radio technology of Japan is used, the front page of PHS standard RCRSTD-28 (on December 20th, 1993) does not stipulate that the carrier wave detectability is with identification efficient channel (frequency and time slot).
Principle and regulation according to FCC (Federal Communications Committee), in the U.S. by convention, VS PCS (personal communication service) also is used to discern an efficient channel (frequency type time slot) even use carrier wave to detect when control channel transmission beginning, detect in advance and want the channel status that uses, be control frequency or time slot, to confirm that this this frequency is not used, and sends then on control channel.
In the control channel transmission that the individual uses, for example in Japan, in the personal handyphone system (PHS) that family expenses or office use, the carrier wave that does not use VS PCS to carry out detects.Or rather, the control channel of base station is provided with respectively for each base station when mounted, the result, and adjacent base station is asynchronous, the control frequency overlaid produces the overlapping of gap timing between the base station, and produces air interference.Therefore, when mounted, being arranged on when detecting the air interference existence of control frequency carried out at once.Though before transmission on the control channel, the set-up time of the base station that the individual uses shortens because of using carrier wave to detect, as requiring among the VS, as long as the setting around the base station does not change, control channel can use, and does not need all to use carrier wave to detect in the past in each transmission of control channel.
The objective of the invention is more provides a kind of radio control signal transmission method, rather than the carrier wave that is used for preventing the generation disturbed in the personal digital radio communication system control channel detects and use the personal digital radio communication system of this method.
Another object of the present invention provides a kind of radio control signal transmission method that is used for digit wireless communication system, and the monitoring that this method will be controlled channel is limited in minimum level, and a kind of personal digital radio communication system that makes in this way.
Comprise the step of monitoring all channel statuss in advance according to personal digital radio communication system of the present invention, as be used to control the effective frequency and the time slot of use, and when transmitting on the control channel between base station and travelling carriage, from monitored channel, select a channel that is not used; And the step of using the selected channel that is not used and on the control channel, sending.
The present invention can be so that when the individual base station of air interference was avoided in one of installation, the control frequency of utilization of adjacent individual base station need to be identified; And need not to select the frequency different just can optionally set up people's base station one by one with adjacent base station frequency.In addition, the present invention has also saved required time and the expense in installation base station.
According to embodiments of the invention, the supervision of the state of control channel, such as, frequency and time slot, can when the base station power supply opening time, when a calling can not be accepted, respond a request, or regular time each section at interval be performed, and when the base station power supply opening, carry out this monitoring at least; Monitor selected control channel with this request of use response by channel status, till carrying out channel status monitoring next time.
Utilize this method, by Monitoring and Controlling channel when the power supply opening, when calling out when not being accepted, and with a regular time at interval, the monitoring of control channel can remain on minimum value and still obtain simultaneously and characteristic value identical when all time supervision control channels.
According to an alternative embodiment of the invention, when confirming that frequency and time slot are effective, the transmission of beginning on a channel, if monitoring through channel status, be found by using and when invalid at other station being used as frequency that control uses and time slot, the channel status of different control channels is also similarly monitored, and efficiency confirmed and the beginning wireless transmission.
In addition, comprise a base station and a travelling carriage that is wiredly connected to the electronic communication circuit device according to the numeral of people one by one communication system of the present invention, the base station that a wireless device is installed is when transmitting on the control channel at base station and travelling carriage, mensuration confirms that as the effective frequency of control use and the channel status of time slot this frequency and time slot can be used as the transmission on control use and the beginning control channel in advance.
According to one embodiment of the present of invention, its wireless device comprises:
A power connection detector, it is at travelling carriage or whether have the power supply that detects them in the base station of this wireless device connects, and sends one and be used to generate the request that monitoring is ordered;
Alternatively comprise:
A call accepted detector not, counting is not accepted the number of times of calling, and when count value during above a set point, sends the request of generation monitor order; And
A timer sends a request that produces the monitoring order at each section of a Fixed Time Interval;
And also comprise:
A channel status monitor, when transmitting on the control channel between base station and travelling carriage, it monitors all in advance can control the frequency of use and the channel status of time slot, and selects an available channel from these monitoring channels; And
A state of a control monitoring command unit responds a request, starts the channel status monitor, generates a monitoring order from the power connection detector, and starts timer.
Above-mentioned purpose of the present invention and other purpose, characteristic will clearly show in the relevant accompanying drawing of following example of the present invention with advantage.
Figure 1 shows that the structure chart of an embodiment of personal digital radio communication system of the present invention.
Figure 2 shows that the structure chart of base station shown in Figure 1.
Fig. 3 is the order of a monitoring control channel of a flowchart illustrations explanation.
Referring to Fig. 1, personal digital radio communication system of the present invention by travelling carriage PS1-PS3 and with the base station BS1-BS3 of an independent communication net or public telecommunication network NW wired connection.Zone 1, zone 2 and zone 3 are respectively base station BS1, base station BS2 and base station BS3 radio wave scope separately.
Referring to Fig. 2, each forms base station BS1-BS3 like this: 1, one power connection detector of a radio-cell 5 detects the energized situation of base station and sends a request that generates the monitoring order; The exhausted call detector 6 of cabinet, counting is not received the number of times of calling, and sends a request that generates the monitoring order when count value surpasses a set point; A set time timer 7 sends one at each section of a Fixed Time Interval and generates asking for instructions of monitoring order; A channel status detector 2, when on a control (the be used for communication) channel during to a travelling carriage transmission, monitor the channel status of all effectively control (being used for communication) frequencies and time slot in advance, from these monitored channels, select a channel that does not have use, and by radio-cell 1 transmission; A control channel status monitoring command unit 3 responds a request; Start channel status monitor 2, from power connection detector 5, call denial detector 6, and set time timer 7 generates a monitoring order; A communication starts channel status monitor 2 with channel status monitor command unit 4.
A kind of frame error rate (FER) method of measurement can be used as a kind of method of retrieving effective control channel in channel state detector 2.In other words, effectively control frequency and time slot are monitored in advance; Margin of error in the Monitoring Data is stored; Calculating is also fixing by the optimum frequency and the time slot that have the minimum error in the data of storing, and this time slot is used to from radio-cell 1 transmission.
The monitoring of frequency and time slot, and by selecting effective frequency and the gap transmission on control channel at a base station, finish by the action that detects the interruption in the refusal calling detection with fixing number of times.Thereby the load on the minimizing 3CPU.
This interrupt action is soluble as follows: at first, if under the disturbed condition formerly, in the installation of subsequently base station, after the energized, monitoring is wanted, and it starts by connecting the base station power supply of installing subsequently, can avoid the interference of adjacent base station control channel this moment.
If mounted base station power supply interrupts because of certain reason or near the state of other base station changes subsequently, then when a calling is accepted, eliminate control channel once more and disturb by starting channel status monitor 2 once more.In addition, the prison in control road can once be carried out and need not to call out all each time to monitor in fixed intervals such as every day or jede Woche.
Usually, if a base station can avoid control channel to disturb as mentioned above, so just elimination is being installed as, is only turning on the power switch with the number of times of setting or after not accepting a frequency of call monitoring.Yet because base station does not have the interference capability as the elimination control channel that can realize in the present invention, channel status monitor 2 must be activated after installing according to setting up standard of operating time.In this mode, the number of times of control channel monitoring can be defined, and observation circuit can be simplified because of monitoring outside these times.
The concrete operations of embodiment below will be described referring to accompanying drawing 3.
Power connection detector 5 detects the power supply of device and opens, and sends a request that produces the monitoring order to control channel status monitoring command unit 3.
In step 11, call accepted detector 6 is not opened, and exhales several N to be " 0 " in step 12 replacement input.In step 13, detector 6 judges whether a call request can be accepted, and maybe can not be accepted, and increases count value in step 14.In step 15, whether detector 6 judgement count values surpass the value of setting in advance M, add up call accepted N again, and send generation and monitor the request of order to control channel status monitoring command unit when aggregate-value surpasses set point M.
Set time timer 7 is being set each section of set time, sends one and generates the monitoring command request to control channel status monitoring command unit 3.
These generation monitoring command request are delivered to control channel status monitoring command unit 3 and are caused control channel status monitoring command unit 3 to start channel status monitors 2, and channel status monitor 2 is checked current channel condition and selected a control letter passage in the wireless device 1 of base station thus.
Though power connection detector 5, refusal call detector 6, and the set time timer all illustrates in the drawings, and it is main having only power connection detector 5, other two parts can omit.
In above-mentioned description, base station has the wireless device of the state of a measured channel, and it determines that a channel is effectively, and in the control channel transmission, but such wireless device also can offer travelling carriage.
In addition, consider a kind of situation, wherein base station BS2 just sets up near base station BS1, and transmits on a control channel.If this moment is consistent from the frequency of the control channel of base station BS2 transmission and time slot and base station BS1's, so, in the overlapping radio wave scope of base station BS1 and BS2, to clash between the control channel, as a result, travelling carriage PS1 in the overlapping region or PS2 can not the identification control information and thereby can't be operated.
By near the control channel checking, and the control channel that (being base station BS2 at this moment) setting can be not overlapping when setting up a base station, this situation has been easy to be avoided, yet, if when base station BS2 set up, base station BS1 did not connect power supply, when the BS2 of installation base station, can not determine potential interference near base station BS1, so, each user must know that base station BS1 connects back interference meeting and produces at once.
On the contrary, in the present invention, before the transmission of control channel, detect effective control channel at base station BS2, the interference between the above-mentioned control channel of result had both made when also not taking place under the overlapping situation of radio wave scope as shown in Figure 1.
Most preferred embodiment of the present invention is described by detailed programs, and this description only is for graphic extension, should be noted that its variation or modification all do not exceed following claim institute's restricted portion or spirit.
Claims (6)
1. one kind by the used radio control signal transmission method of forming with the base station and the travelling carriage of electronic communication circuit device wired connection of personal digital radio communication system, comprising:
When transmitting on the control channel between described base station and described travelling carriage, be used for monitoring in advance the channel status of all available control frequencys and time slot, and from these monitored channels, select the step of a untapped channel; And
The step that is used to use this selecteed untapped channel and sends a control channel.
2. in accordance with the method for claim 1, it is characterized in that, at least the request of response when described base station power supply opening, when calling can not be accepted, or at least one request of each section in Fixed Time Interval, carry out the channel status of monitoring described control frequency and time slot, and the control channel that uses the channel status monitoring undertaken by the response described request to select, till the detection of channel status next time.
3. in accordance with the method for claim 1, it is characterized in that, when confirming that a frequency and time slot begin the transmission on described channel when effective, if by the supervisory channel state, discovery is used by another travelling carriage as the control frequency of usefulness and time slot and when therefore invalid, then the channel status of another different control channel is also monitored similarly, through efficiency confirmed, then begins wireless transmission.
4. a personal digital radio communication system comprises the base station of a travelling carriage and and electronic communication circuit device wired connection, described base station has a wireless device, when the control channel between described base station and described travelling carriage transmits, it monitors the channel status of available control frequency and time slot in advance, confirm the monitored control frequency and the validity of time slot, and on a control channel, begin transmission.
5. a personal digital radio communication system comprises the base station of a travelling carriage and and electronic communication circuit device wired connection, described mobile radio station has a wireless device, when the control channel between described base station and described travelling carriage transmits, it monitors the channel status of available control frequency and time slot in advance, confirm the monitored control frequency and the validity of time slot, and on a control channel, begin transmission.
6. according to claim 4 or 5 described personal digital radio communication systems, it is characterized in that described wireless device comprises:
A power connection detector detects described travelling carriage and whether the power supply that has in the base station of described wireless device is to connect and send a request that generates the monitoring order;
Described wireless device can comprise selectively:
A call accepted detector not, counting is called out does not have received number of times, and sends a request that generates the monitoring order when count value surpasses set point; And
Timer sends a request that produces the monitoring order in each section of a Fixed Time Interval; And
Described wireless device also comprises:
A channel status monitor, when transmitting on the control channel at described base station and described travelling carriage, it monitors all frequencies that can be used for controlling and the channel status of time slot in advance, and selects an available channel from monitored channel; And
A control channel status monitoring command unit, it responds a request, starts described channel status monitor, from described power connection detector, described not call accepted detector, and described timer generates a monitoring order.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7058875A JPH08256373A (en) | 1995-03-17 | 1995-03-17 | Radio control signal transmission system, base station and mobile station |
| JP058875/95 | 1995-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1137215A CN1137215A (en) | 1996-12-04 |
| CN1083229C true CN1083229C (en) | 2002-04-17 |
Family
ID=13096944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96107324.1A Expired - Fee Related CN1083229C (en) | 1995-03-17 | 1996-03-16 | Radio control signal transmission method for personal digital radio communication system |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH08256373A (en) |
| CN (1) | CN1083229C (en) |
| AU (1) | AU712162B2 (en) |
| GB (1) | GB2300541B (en) |
| HK (1) | HK1011479A1 (en) |
| SG (1) | SG47094A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6330441B1 (en) * | 1997-03-03 | 2001-12-11 | Victor Company Of Japan, Ltd. | Communication system |
| US6941143B2 (en) * | 2002-08-29 | 2005-09-06 | Thomson Licensing, S.A. | Automatic channel selection in a radio access network |
| KR100612212B1 (en) * | 2005-06-07 | 2006-08-11 | 블루텍 주식회사 | A frequency interference prevention method of audio system |
| JP5211912B2 (en) * | 2008-07-24 | 2013-06-12 | 日本電気株式会社 | RADIO COMMUNICATION SYSTEM, MANAGEMENT DEVICE, MANAGEMENT DEVICE DATA PROCESSING METHOD, AND MONITORING METHOD |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2580129B2 (en) * | 1986-07-18 | 1997-02-12 | ソニー株式会社 | Transceiver |
| CA1250900A (en) * | 1986-11-18 | 1989-03-07 | Northern Telecom Limited | Private cellular system |
| JP2555904B2 (en) * | 1989-04-27 | 1996-11-20 | 日本電気株式会社 | Car phone system |
| JPH0834627B2 (en) * | 1989-07-24 | 1996-03-29 | 日本電気株式会社 | Channel selection method |
| FI87122C (en) * | 1990-12-04 | 1992-11-25 | Telenokia Oy | RADIO SYSTEM |
| US5388149A (en) * | 1991-06-03 | 1995-02-07 | At&T Corp. | Method and apparatus for determining availability of a public base unit for communicating with a cordless telephone in a public cordless telephone system |
| JPH05165598A (en) * | 1991-12-17 | 1993-07-02 | Hitachi Ltd | Display control ic and information processor |
| US5373547A (en) * | 1993-06-28 | 1994-12-13 | Motorola, Inc. | Method and apparatus for radio handset spectrum range registration |
-
1995
- 1995-03-17 JP JP7058875A patent/JPH08256373A/en active Pending
-
1996
- 1996-03-15 AU AU48105/96A patent/AU712162B2/en not_active Ceased
- 1996-03-15 SG SG1996006611A patent/SG47094A1/en unknown
- 1996-03-15 GB GB9605511A patent/GB2300541B/en not_active Expired - Fee Related
- 1996-03-16 CN CN96107324.1A patent/CN1083229C/en not_active Expired - Fee Related
-
1998
- 1998-11-24 HK HK98112242A patent/HK1011479A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HK1011479A1 (en) | 1999-07-09 |
| CN1137215A (en) | 1996-12-04 |
| GB9605511D0 (en) | 1996-05-15 |
| AU712162B2 (en) | 1999-10-28 |
| SG47094A1 (en) | 1998-03-20 |
| GB2300541B (en) | 2000-01-12 |
| GB2300541A8 (en) | 1996-11-18 |
| GB2300541A (en) | 1996-11-06 |
| JPH08256373A (en) | 1996-10-01 |
| AU4810596A (en) | 1996-09-26 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |