JP4439721B2 - Broadcast communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a broadcast communication method in which broadcast communication can be retried to unidentified mobile stations by group call, an acknowledge can be collected by a control channel upon finishing communication, and a commander can command other incoming and outgoing calls even during collection of an acknowledge. SOLUTION: A radio section comprises base station units 11-13 and mobile station units 1-5, the network side comprises the base station units 11-13, a control station unit 10 and command station units 14 and 15 which broadcast only to unidentified mobile stations. In this regard, a message at the time of calling a broadcast communication is imparted with a call number and an acknowledge collection time, messages at the time of requesting acknowledge and at the time of acknowledge are imparted with a call number and the acknowledge is imparted with the acknowledge condition of a user (acknowledged/not yet acknowledged/not yet set). Information telling presence/ absence of a broadcast communication and information of a call number when a broadcast communication is present is informed from a base station to a mobile station on the control channel and an acknowledge is collected on the control channel upon finishing a broadcast communication.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a broadcast communication method for retransmitting broadcast to unidentified mobile stations in the wireless communication field.
[0002]
[Prior art]
Conventionally, when retransmitting a broadcast to an unconfirmed mobile station, perform the broadcast after calling the broadcast, collect the confirmation response, and then call each call individually. ing. Furthermore, collection of confirmation responses is performed on a communication channel that performs simultaneous broadcast communication. Such a response collection method for broadcast communication is disclosed in, for example, Japanese Patent Laid-Open No. 5-344036. This technology recognizes and collects the order of response signals without error using the clock pulse synchronized with the polling cycle and the clock pulse synchronized with the first polling signal as the cycle and the period when the polling completes a cycle. is there. According to this technique, even when the number of response stations is large and the collection time is short, the correct order of response station signals can be recognized and collected.
[0003]
[Problems to be solved by the invention]
However, in the conventional technology as described above, when retransmitting a broadcast to an unconfirmed mobile station, since individual calls are performed, if the number of unconfirmed mobile stations increases, a long time is required for retransmission. It is not easy to use. In addition, because confirmation response collection processing is performed on a communication channel that is performing broadcast communication, while the command device is collecting confirmation responses, the command device or mobile station is communicating. In addition, there are problems such as being unable to make / receive calls for other calls.
[0004]
The present invention has been made in view of such circumstances, and an object of the present invention is to enable a group call to be retransmitted when retransmitting a broadcast to an unconfirmed mobile station, and to confirm a response. The collection processing can be performed on the control channel after the communication is completed, so that the command device can make incoming and outgoing calls related to other calls even during the collection of confirmation responses.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the broadcast method of the present invention is a broadcast method for retransmitting a broadcast to a mobile station in the wireless communication field. When the commanding device to collect information about whether or not mobile stations belonging to the group subject to broadcast communication have confirmed the broadcast communication, it calls the message at the confirmation request and the message at the confirmation response. The number is assigned and the same call number as the message number at the time of the broadcast communication call is used to collect the confirmation response to call and collect the target mobile station individually, and after the broadcast communication ends By performing on the control channel, after the communication is completed, the command device collects a plurality of confirmation responses of the simultaneous broadcast communication by performing the simultaneous broadcast communication with another call .
[0013]
According to such a broadcast communication method, since the simultaneous broadcast communication is retransmitted to the unconfirmed mobile station by the group call, the retransmission can be performed in a fixed time regardless of the number of unconfirmed mobile stations. . Therefore, the efficiency of retransmission can be improved. In addition, broadcast communication is classified by call number, and collection of acknowledgments is performed on the control channel after broadcast communication is completed, so that even if the command device is collecting information, The device can make incoming and outgoing calls for other calls. This makes it possible to collect confirmation responses for a plurality of simultaneous broadcast communications.
[0014]
In addition, the present invention is characterized in that, by the broadcast communication method of each of the above inventions, an operation is realized in a system having a broadcast communication function or an apparatus constituting the system.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a simultaneous broadcast communication system according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a configuration diagram of a broadcast communication system in an embodiment of the present invention. First, the configuration of the system in FIG. 1 will be described. A plurality of base station apparatuses 11, 12, and 13 are connected under the control station apparatus 10. Further, the mobile station device 3 having the individual number 3 belongs to the base station device 11, the mobile station device 1 having the individual number 1 and the mobile station device 2 having the individual number 2 belong to the base station device 12, The mobile station apparatus 4 having the individual number 4 and the mobile station apparatus 5 having the individual number 5 belong to the base station apparatus 13, and communication is performed between each mobile station apparatus and the base station apparatus by radio. Further, the command station devices 14 and 15 are connected to the control station device 10, and communication between each command station device and the control station device is performed by wire.
[0016]
The service area of each base station device is called a base zone, and the service area of a control station device to which each base station device is connected is called a control zone. Therefore, the base station apparatus 11 has a base zone 11a including the mobile station apparatus 3, the base station apparatus 12 has a base zone 12a including the mobile station apparatus 1 and the mobile station apparatus 2, and the base station apparatus 13 is The mobile station apparatus 4 includes a base zone 13 a including the mobile station apparatus 4 and the mobile station apparatus 5. Further, the control station device 10 has a control zone 10a including base zones 11a, 12a, and 13a of the base station devices 11, 12, and 13.
[0017]
FIG. 2 is a diagram showing an example of the functional channel configuration of the control channel, and the configuration of the functional channel will be described using this diagram. On the system, the downlink of the control physical channel is BCCH (Broadcast Control Channel: Broadcast Channel), PCH (Paging Channel: Broadcasting Channel), SCCH (Signaling Control Channel: Signaling Channel), UPCH (User Packet Channel: User Packet Channel). ), And the uplink of the control physical channel is composed of SCCH and UPCH. In FIG. 2, BCCH is abbreviated as BC, SCCH as SC, and PCH as PC.
[0018]
As shown in FIG. 2, as an example of the functional channel configuration in the system, the downlink of the control physical channel is as follows: PCH call group number = 1, BCCH number = 4, SCCH number immediately after BCCH = 4, PCH number = 5 , The number of SCCHs after PCH = 4, and all uplinks of the control physical channel are SCCHs. However, these numerical values are merely examples, and are not limited thereto.
[0019]
FIG. 3 is a flowchart showing an example of a control sequence to a plurality of mobile stations in the simultaneous broadcast communication system shown in FIG. As preconditions for the control sequence of FIG. 3, in the system configuration of FIG. 1, group A has mobile station apparatuses 1, 2, 3, 4, 5 having individual numbers 1, 2, 3, 4, 5 and a command. The station device 14 belongs, and the target stations for the confirmation request for the broadcast communication are the mobile station devices 1, 2, 3, 4 with individual numbers 1, 2, 3, 4 respectively.
[0020]
In the control sequence of FIG. 3, simultaneous broadcast communication with call number 1 and group number A starts, and at the same time, a collection status notification (with broadcast communication, group number A, call number) is made on the function channel of BCCH or PCH. 1) starts transmission from the base station to the mobile station (step S1). At this time, the first simultaneous broadcast communication with call number 1 and group number A and the confirmation status are as follows. In the following description, each mobile station device is represented by an individual number.
Individual number 1: Not received in broadcast communication, confirmation request is not received, and confirmation response is not transmitted. Therefore, the command station device does not receive the confirmation response.
・ Individual number 2: It was pulled into the broadcast communication and the confirmation setting was completed, and a confirmation response with confirmation confirmation was transmitted in response to the confirmation request, and the command station apparatus received the confirmation response with confirmation confirmation set.
・ Individual number 3: Pulled in broadcast communication, confirmation is not set, and a confirmation response without confirmation is transmitted in response to the confirmation request, and the command station apparatus receives a confirmation response without confirmation.
・ Individual number 4: Pulled in broadcast communication, confirmation has been set, and a confirmation response with confirmation set has been transmitted in response to the confirmation request, and the command station apparatus has received the confirmation response with confirmation set.
・ Individual number 5: The confirmation request is not received because it has been pulled into the broadcast communication and has been confirmed and is not an elephant station for the confirmation request.
[0021]
Then, as a result of the first simultaneous broadcast communication, the management status at the command station apparatus is as follows.
・ Non-reception: Individual number 1
・ Not set: Individual number 3
・ Confirmed settings: Individual numbers 2, 4
Unconfirmed setting: None, that is, the mobile station apparatuses 2, 4, 5 with individual numbers 2, 4, 5 do not react.
[0022]
Here, since there is a mobile station other than the confirmation response of the confirmed setting, the broadcast communication is retransmitted (step S2). That is, the second simultaneous broadcast communication with call number 1 and group number A and the confirmation status are as follows.
・ Individual number 1: Pulled into broadcast communication, confirmation has been set (step S3), and a confirmation response with confirmation has been sent (step S5) to the confirmation request (step S5), command The station apparatus receives the confirmation response that has been confirmed (step S6).
Individual number 2: Since the simultaneous broadcast communication of call number 1 and group number A has been confirmed, it does not respond to the simultaneous broadcast communication.
Individual number 3: Since the simultaneous broadcast communication of call number 1 and group number A is not set, it is drawn into the simultaneous broadcast communication, unconfirmed is set (step S7), and the confirmation request is received (step S8a) , S8b), an unconfirmed setting confirmation response is transmitted (step S9), and the command station apparatus receives the unconfirmed setting confirmation response (step S10).
Individual number 4: Since the simultaneous broadcast communication of call number 1 and group number A has been confirmed, it does not respond to the simultaneous broadcast communication.
Individual number 5: Since the simultaneous broadcast communication of call number 1 and group number A has been confirmed, it does not respond to the simultaneous broadcast communication.
[0023]
Then, as a result of the second simultaneous broadcast communication, the management status at the command station apparatus is as follows.
・ Non-reception: None / Not set: None / Confirmed setting: Individual number 1
・ Unconfirmed setting: Individual number 3
When combined with the first time,
・ Non-reception: None / Not set: None / Confirmed setting: Individual numbers 1, 2, 4
・ Unconfirmed setting: Individual number 3
Here, since there is a station other than the confirmation response of the confirmed setting, the broadcast communication is retransmitted (step S11). That is, the third simultaneous broadcast communication with call number 1 and group number A and the confirmation status are as follows.
Individual number 1: Call number 1 and group number A broadcasts are already confirmed, so they do not react to broadcasts.
Individual number 2: Since the simultaneous broadcast of call number 1 and group number A has been confirmed, it does not respond to the simultaneous broadcast.
Individual number 3: Since the simultaneous broadcast communication of call number 1 and group number A has not been confirmed, it is drawn into the simultaneous broadcast communication, and the confirmation of the simultaneous communication is set (step S12). Steps S13a and S13b), a confirmation response for the confirmed setting is transmitted (Step S14), and the command station apparatus receives the confirmation response for the confirmed setting (Step S15).
Individual number 4: Since the simultaneous broadcast communication of call number 1 and group number A has been confirmed, it does not respond to the simultaneous broadcast communication.
Individual number 5: Since the simultaneous broadcast communication of call number 1 and group number A has been confirmed, it does not respond to the simultaneous broadcast communication.
[0024]
Then, as a result of the third simultaneous broadcast communication, the management status at the command station apparatus is as follows.
[0025]
Not received: Not set: Not checked Setting: Individual number 3
Unconfirmed setting: None, so when combined with the first and second,
Non-reception: No setting: No confirmation setting: Individual numbers 1, 2, 3, 4
Unconfirmed setting: None Here, all target general stations in group A have been confirmed (step S16), and since there is no station other than the confirmation response of the confirmation simultaneous setting, the simultaneous broadcast communication is terminated (step S17). Simultaneously with the end of broadcast communication with call number 1 and group number A, transmission is started from the base station apparatus to the mobile station apparatus by means of a collection status notification (no simultaneous communication) on the BCCH or PCH function channel. (Step S18).
[0026]
4A and 4B are configuration examples of messages used for confirmation of broadcast communication. FIG. 4A shows a group communication call (RT) of a broadcast call message and FIG. 4B shows a call of the broadcast call message. Settings (CC) and (c) are communication modes in call setting, (d) is a confirmation request message (RT), (e) is a confirmation response message (RT), and (f) is a collection status notification message (RT). . Note that RT (Radio Frequency Transmission Management) represents a radio management entity and CC (Call Control) represents a call control entity.
[0027]
The information element name, octet arrangement, and bit allocation in each figure are examples of message configurations. This message configuration example includes information elements that are not related to confirmation of broadcast communication. Note that information elements having reference numerals (numbers) in the figure are information elements related to confirmation of simultaneous broadcast communication of the present invention. In addition, the method for realizing confirmation of broadcast communication by a message including information elements related to confirmation of broadcast communication of the present invention is different in octet arrangement and bit allocation, message name is different, It may be realized as a message configuration attached to a message.
[0028]
Next, the broadcast call message shown in FIGS. 4A, 4B, and 4C will be described. The broadcast communication call message is a message that is transmitted by PCH from the base station to the mobile station as a group communication call (RT) and call setting (CC).
[0029]
In the group communication call (RT) of FIG. 6A, when the extended information element length 21 is provided in the group communication call (RT) message and the extended information element length 21 = 0, the simultaneous broadcast without confirmation of the broadcast communication response is performed. Indicates a communication call. Further, when the extended information element length 21 = 1, it indicates that it is a simultaneous broadcast call with confirmation of a broadcast communication response.
[0030]
Here, the call number 22 of the simultaneous communication is assigned to the group communication call (RT) as a call number for distinguishing the call with the confirmation of the simultaneous communication response. In the example of FIG. 6A, the broadcast communication call number 22 is assigned with 4 bits, “0” is a reserved call number, and “1-15” is a call number for distinguishing confirmation of broadcast communication response. Also, the same call number is set for confirmation requests and confirmation responses for the same call.
[0031]
Further, a broadcast response confirmation time 23 is given to the group communication call (RT) as an expected time required for collecting confirmation responses of the broadcast communication. In the example of FIG. 5A, the broadcast response confirmation time 23 is given by 6 bits, “0” is the broadcast response confirmation time (30 seconds), and “1 to 63” is the broadcast response confirmation time (1 minute). ~ 63 minutes). Note that a method for calculating the expected time required for collecting confirmation responses of the broadcast communication will be described later.
[0032]
Next, in the call setting (CC) in FIG. 5B, the communication direction of the call setting (CC) indicates downlink (PCH, SCCH, FACCH / SACCH). Further, as shown in FIG. 5C, the communication mode 31 of FIG. 7B is a simplex / duplex / single, individual / group communication mode, such as simplex individual, duplex individual, It shall be identified as a simplex group and a simultaneous broadcast.
[0033]
Next, the confirmation request message (RT) shown in FIG. This confirmation request message (RT) is a message transmitted by PCH from the base station to the mobile station. A call number 41 is assigned to this message, and the same call number as the broadcast broadcast call message in FIG. In the example of FIG. 4D, the call number 41 is bit 8 to bit 5 and is used as a call number for distinguishing confirmation of simultaneous communication response confirmation, “0” is a reserved call number, and “1-15” is a simultaneous communication. The call number is used to distinguish whether there is a response confirmation.
[0034]
Next, the confirmation response message (RT) shown in FIG. This confirmation response message (RT) is a message transmitted on the SCCH from the mobile station to the base station. It is assumed that a call number 51 is assigned to this message, and the same call number is set as in the simultaneous broadcast call message in FIG. 9A and the confirmation request message in FIG. In the example of FIG. 5E, call number 51 is assigned to bits 8 to 5 and is used as a call number for distinguishing confirmation of simultaneous communication response, “0” is reserved call number, and “1-15” is simultaneous communication. The call number is used to distinguish whether there is a response confirmation.
[0035]
In addition, a confirmation response code 52 is given as a code for distinguishing the customer of the confirmation response to the confirmation request, and confirmation is not set, confirmation is set (confirmed), and confirmation is set (unconfirmed) according to the confirmation status of the user Set them separately with and send an acknowledgment. In the example shown in FIG. 5E, a confirmation response code is assigned to bit 4 to bit 1 as a code for distinguishing the confirmation response contents for the confirmation request, “0” is not confirmed, “1” is confirmed and set (confirmed) Completed) and “2” are confirmed and set (unconfirmed).
[0036]
Next, the collection status notification message (RT) shown in FIG. This collection status notification message (RT) is a message transmitted from the base station to the mobile station by PCH or BCCH. It can be transmitted independently as a collection status notification message (RT) regardless of the broadcast information (BCCH), or can be transmitted to the information element of the broadcast information (BCCH) and transmitted as broadcast information (RT). It is.
[0037]
The presence / absence of simultaneous transmission 61 is given as information indicating the presence / absence of simultaneous broadcast communication for which confirmation responses are being collected by the command station apparatus. Further, when there is a simultaneous broadcast communication for which confirmation responses are being collected, the call number notification method is notified at the bit position.
[0038]
In the example of FIG. 5F, the presence / absence of simultaneous 61 indicates that “0” indicates that there is no call number during simultaneous response confirmation, and “1” indicates that there is a call number during simultaneous response confirmation. As for presence / absence of the call numbers 1 to 15, “0” indicates that there is no simultaneous response of the designated call number, and “1” indicates that there is a simultaneous response of the specified call number.
[0039]
Next, a description will be given of a method for calculating the expected time required for collecting confirmation responses for broadcast communication. First, each code is assumed as follows.
[0040]
Np: Number of polling target stations Np1: Collected polling number T: Expected collection time Tw: Mobile station operation waiting time Tp1: Polling interval time per unit: Tp2: Polling waiting time in collective polling Expected collection time (T) Is calculated by the following equation.
[0041]
When Np% Np1 = 0,
T = Tw + Np × Tp1 + (Np / Np1) × Tp2; Tw + Tp2 extra addition When Np% Np1 ≠ 0,
T = Tw + Np × Tp1 + {(Np / Np1) +1} × Tp2; Tw + Tp2 extra addition Next, a specific calculation example of the simultaneous response confirmation time will be described.
If Np = 18 units, Np1 = 10 units, Tw = 5 seconds, Tp1 = 1.5 seconds, Tp2 = 4 seconds,
Since Np% Np1 = 18/10 ≠ 0, the expected collection time T is
T = 5 + 18 × 1.5 + {(18/10) +1} × 4 = 40 seconds.
FIG. 5 shows an example of calculating the simultaneous response confirmation time.
[0042]
FIG. 6 shows a first case of a control sequence focusing on one mobile station in the broadcast communication system shown in FIG. That is, in FIG. 6, communication is performed by simultaneous broadcast communication (first time), a confirmation response is transmitted in response to the confirmation request immediately after that, and the confirmation response is still being collected by the command device. The control sequence of the case where the confirmation response is transmitted even when the confirmation request is received immediately after the broadcast communication (second time) is shown.
[0043]
That is, in FIG. 6, when transmission is started from the base station side to the mobile station side by the collection status notification (response is confirmed) in the first simultaneous broadcast communication (step S21), the mobile station side to the base station The first response confirmation is transmitted to the side (step S22). Then, in response to the confirmation request from the base station immediately after that (step S23), the mobile station transmits a confirmation response (step S24). At this time, when the mobile station side receives a confirmation request from the base station side immediately after the second simultaneous broadcast communication by recognizing that the confirmation response is still being collected by the commanding device (step S25), the mobile station The side transmits an acknowledgment to the base station side (step S26).
[0044]
FIG. 7 shows a second case of the control sequence focusing on one mobile station in the simultaneous broadcast communication system shown in FIG. That is, in FIG. 7, communication is performed by simultaneous broadcast communication (first time), and transmission is started from the base station side to the mobile station side by the collection status notification (response confirmation is present) (step S31). The control sequence in the case where the mobile station transmits a confirmation response (step S33) in response to a confirmation request from the base station immediately after the communication (second time) (step S32) is shown.
[0045]
FIG. 8 shows a third case of the control sequence focusing on one mobile station in the broadcast communication system shown in FIG. That is, in FIG. 8, communication is performed by simultaneous broadcast communication (first time) (step S41), communication is also performed by simultaneous broadcast communication (second time) for unconfirmed, and in response to a confirmation request immediately thereafter (step S42), confirmation is performed. The control sequence in the case of transmitting a response (step S43) is shown.
[0046]
FIG. 9 shows a fourth case of the control sequence focusing on one mobile station in the broadcast communication system shown in FIG. In other words, in FIG. 9, communication is performed by simultaneous broadcast communication (first time) (step S51), and confirmation confirmation is not recognized, confirmation request cannot be recognized, and confirmation response is transmitted. The control sequence of the case where it cannot be shown is shown.
[0047]
FIG. 10 shows a fifth case of the control sequence focusing on one mobile station in the simultaneous broadcast communication system shown in FIG. That is, in FIG. 10, communication is performed by simultaneous broadcast communication (first time) (step S61), and after the confirmation setting has been completed, the mobile station once transits out of the service area (step S62) and then within the service area (step S63). ) When the mobile station side receives a confirmation request by recognizing that the confirmation response is still being collected by the commanding device (step S64), the mobile station transmits a confirmation response (step S65). Show.
[0048]
FIG. 11 shows a sixth case of the control sequence focusing on one mobile station in the broadcast communication system shown in FIG. In other words, FIG. 11 shows a control sequence in the case where the mobile station side recognizes the end of collection of the confirmation response of the command device (step S72) due to the timeout of the simultaneous response confirmation time timer (step S71).
[0049]
【The invention's effect】
As described above, according to the broadcast method of the present invention, the broadcast is retransmitted to the unconfirmed mobile station by the group call, so that a fixed time can be obtained regardless of the number of unconfirmed mobile stations. Can be retransmitted in order to increase the efficiency of retransmission. In addition, broadcast communication is classified by call number, and collection of acknowledgments is performed on the control channel after broadcast communication is completed, so that even if the command device is collecting information, Since the apparatus can make incoming and outgoing calls related to other calls, it can collect confirmation responses of a plurality of simultaneous broadcast communications.
[Brief description of the drawings]
1 is a configuration diagram of a broadcast communication system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a functional channel configuration of a control channel. Fig. 4 is a flow chart showing an example of a control sequence to a mobile station. Fig. 4 is a configuration example of a message used for confirmation of broadcast communication. (A) is a group communication call (RT) of a broadcast call message. (B) is a call setting (CC) of a broadcast call message, (c) is a communication mode in call setting, (d) is a confirmation request message (RT), (e) is an acknowledgment message (RT), ( f) Collection status notification message (RT)
5 is a calculation example of a simultaneous response confirmation time. FIG. 6 is a first case of a control sequence focusing on one mobile station in the simultaneous broadcast communication system shown in FIG. 1. FIG. Second Case of Control Sequence Focusing on One Mobile Station in Broadcast Communication System [FIG. 8] Third Control Sequence Focused on One Mobile Station in Simultaneous Broadcast Communication System shown in FIG. Case [FIG. 9] Fourth case of control sequence focusing on one mobile station in the simultaneous broadcast communication system shown in FIG. 1 [FIG. 10] One mobile in the simultaneous broadcast communication system shown in FIG. Fifth Case of Control Sequence Focused on Stations [FIG. 11] Sixth Case of Control Sequence Focused on One Mobile Station in the Simultaneous Broadcast Communication System shown in FIG.
1, 2, 3, 4, 5 Mobile station device 10 Control station device 10a Control zone 11, 12, 13 Base station device 11a, 12a, 13a Base zone 14, 15 Command station device 21 Extended information element length 22 Call for simultaneous communication Number 23 Confirmation time for simultaneous communication 31 Communication form 41, 51 Call number 52 Confirmation response code 61 Presence / absence of simultaneous response

Claims (2)

A broadcast communication method for retransmitting broadcast to mobile stations in the wireless communication field,
A command device that resends broadcast communications.
When collecting information about whether or not mobile stations belonging to a group subject to broadcast communication were able to confirm broadcast communication,
Confirmation by assigning a call number to the message at the time of confirmation request and the message at the time of confirmation response, and calling and collecting the target mobile station individually as the call number of the message at the time of broadcast broadcast call While collecting responses ,
Collecting multiple broadcast acknowledgments by performing the broadcast on the control channel after the end of the broadcast communication, so that after the communication ends, the command device performs the broadcast broadcast on another call. A simultaneous broadcast communication method characterized by being performed . The simultaneous broadcast communication method according to claim 1, wherein an operation is realized by a system having a broadcast communication function or a device constituting the system .

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