US 9,853,825 B2 · Single cell point to multi-points network system and data transmission method thereof

Abstract

A single cell point to multi-points (SC-PTM) network system and a data transmission method thereof are provided. The SC-PTM network system includes a base station and a first mobile station group and a second mobile station group. The base station multicasts a message to the mobile station groups via a first bearer, and receives a plurality of confirmation notifications from the mobile station groups. The base station determines a data transmitting status of the mobile stations and re-transmits the message to the mobile stations of the group which has higher priority.

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Drawings

Claims25

Dependent claims

A data transmission method for a base station, the base station being used in a single cell point to multi-points (SC-PTM) network system, the SC-PTM network system further comprising a plurality of first mobile stations and a plurality of second mobile stations, the first mobile stations belonging to a first mobile station group and the second mobile stations belonging to a second mobile station group, and the base station multicasting a first message to the first mobile stations of the first mobile station group and the second mobile stations of the second mobile station group via a first bearer, the data transmission method comprising:

(a) the base station receiving a plurality of first confirmation notifications and a plurality of second confirmation notifications respectively from the first mobile stations and the second mobile stations via the first bearer;
(b) the base station determining a first count of at least one third mobile station that has not received the first message according to the first confirmation notifications, and determining a second count of at least one fourth mobile station that has not received the first message according to the second confirmation notifications;
(c) the base station to determining that the first count is not greater than a first count threshold and a sum of the first count and the second count is greater than the first count threshold;
(d) the base station transmitting a first bearer switching instruction to the at least one third mobile station via the first bearer according to the result of the step (c), wherein the first bearer switching instruction is adapted to notify the at least one third mobile station to receive the first message via a second bearer;
and
(e) the base station transmitting the first message to the at least one third mobile station via the second bearer, wherein the base station transmits messages to the at least one third mobile station continuously via the second bearer.

3 more elements

(a) the base station receiving a plurality of first confirmation notifications and a plurality of second confirmation notifications respectively from the first mobile stations and the second mobile stations via the first bearer;
(b) the base station determining a first count of at least one third mobile station that has not received the first message according to the first confirmation notifications, and determining a second count of at least one fourth mobile station that has not received the first message according to the second confirmation notifications;
(c) the base station determining that a sum of the first count and the second count is not greater than a first count threshold;
(d) the base station transmitting a first bearer switching instruction to the at least one third mobile station and the at least one fourth mobile station via the first bearer according to the result of the step (c), wherein the first bearer switching instruction is adapted to notify the at least one third mobile station and the at least one fourth mobile station to receive the first message via a second bearer;
and
(e) the base station transmitting the first message to the at least one third mobile station and the at least one fourth mobile station via the second bearer, wherein the base station transmits messages to the at least one third mobile station and the at least one fourth mobile station continuously via the second bearer.

3 more elements

A base station being used in an SC-PTM network system, the SC-PTM network system further comprising a plurality of first mobile stations and a plurality of second mobile stations, and the first mobile stations belonging to a first mobile station group and the second mobile stations belonging to a second mobile station group, the base station comprising:

a transceiving unit;
and
a processing unit;
wherein the processing unit is configured to:
multicast a first message to the first mobile stations of the first mobile station group and the second mobile stations of the second mobile station group via a first bearer by use of the transceiving unit;
receive a plurality of first confirmation notifications and a plurality of second confirmation notifications respectively from the first mobile stations and the second mobile stations via the first bearer by use of the transceiving unit;
determine a first count of at least one third mobile station that has not received the first message according to the first confirmation notifications, and determine a second count of at least one fourth mobile station that has not received the first message according to the second confirmation notifications;
determine that the first count is not greater than a first count threshold and a sum of the first count and the second count is greater than the first count threshold;
transmit a first bearer switching instruction to the at least one third mobile station via the first bearer by use of the transceiving unit according to the result that the first count is not greater than the first count threshold and the sum of the first count and the second count is greater than the first count threshold, wherein the first bearer switching instruction is adapted to notify the at least one third mobile station to receive the first message via a second bearer;
and
transmit the first message to the at least one third mobile station via the second bearer by use of the transceiving unit, wherein the transceiving unit transmits messages to the at least one third mobile station continuously via the second bearer.

8 more elements

a transceiving unit;
and
a processing unit;
wherein the processing unit is configured to:
multicast a first message to the first mobile stations of the first mobile station group and the second mobile stations of the second mobile station group via a first bearer by use of the transceiving unit;
receive a plurality of first confirmation notifications and a plurality of second confirmation notifications respectively from the first mobile stations and the second mobile stations via the first bearer by use of the transceiving unit;
determine a first count of at least one third mobile station that has not received the first message according to the first confirmation notifications, and determine a second count of at least one fourth mobile station that has not received the first message according to the second confirmation notifications;
determine that a sum of the first count and the second count is not greater than the first count threshold;
transmit a first bearer switching instruction to the at least one third mobile station and the at least one fourth mobile station via the first bearer by use of the transceiving unit according to the result that the sum of the first count and the second count is not greater than the first count threshold, wherein the first bearer switching instruction is adapted to notify the at least one third mobile station and the at least one fourth mobile station to receive the first message via a second bearer;
and
transmit the first message to the at least one third mobile station and the at least one fourth mobile station via the second bearer by use of the transceiving unit, wherein the transceiving unit transmits messages to the at least one third mobile station and the at least one fourth mobile station continuously via the second bearer.

8 more elements

Dependencies are inferred from the claim text.

Description7,683 words

Summary1,227 words

#The present invention relates to a single cell point to multi-points (SC-PTM) network system and a data transmission method thereof. More particularly, the SC-PTM network system and the data transmission method thereof of the present invention adjust the use of the bearer and re-transmit data according to the accessing statuses of different numbers of mobile stations.

#Under the conventional evolved Multimedia Broadcast Multicast Service (eMBMS) architecture, a base station broadcasts messages to multiple mobile stations within the communication coverage thereof mainly via a single bearer so that the mobile stations can receive the relevant messages. However, no satisfactory data re-transmission mechanism is available in the eMBMS architecture. Thus, if any mobile station misses part of the broadcasted messages, then it can only continue to receive the subsequent messages but cannot re-acquire the message previously missed.

#Accordingly, if the mobile station needs to further use the Single Cell Point to multi-points network system (SC-PTM) service under the eMBMS architecture to transmit messages and a high reliability is required in the message transmission, the mobile station will be unable to obtain the relevant information efficiently and correctly because of the unavailability of a satisfactory data re-transmission mechanism in the eMBMS architecture.

Brief description of the drawings9 figures

#FIG. 1A is a schematic view of a SC-PTM network system according to a first embodiment of the present invention;

#FIG. 1B is a block diagram of a base station according to the first embodiment of the present invention;

#FIG. 1C is a block diagram of a mobile station according to the first embodiment of the present invention;

Detailed description6,273 words

#In the following description, the present invention will be explained with reference to certain example embodiments thereof. However, these example embodiments are not intended to limit the present invention to any specific examples, embodiments, environment, applications or implementations described in these example embodiments. Therefore, description of these example embodiments is only for purpose of illustration rather than to limit the present invention. In the following embodiments and the attached drawings, elements unrelated to the present invention are omitted from depiction; and dimensional relationships among individual elements in the attached drawings are illustrated only for ease of understanding, but not to limit the actual scale.

#Please refer to FIG. 1A to FIG. 1C. FIG. 1A is a schematic view of a Single Cell Point to Multi-Points (SC-PTM) network system 1 according to a first embodiment of the present invention, and the SC-PTM network system 1 comprises a base station 11, a plurality of first mobile stations 13a˜13c and a plurality of second mobile stations 15a˜15b. The first mobile stations 13a˜13c belong to a first mobile station group G1, and the second mobile stations 15a˜15b belong to a second mobile station group G2. FIG. 1B is a block diagram of the base station 11 according to the first embodiment of the present invention, and the base station 11 comprises a transceiving unit 111 and a processing unit 113.

#FIG. 1C is a block diagram of the first mobile station 13a according to the first embodiment of the present invention, and the first mobile station 13a comprises a transceiving unit 131a and a processing unit 133a. It shall be particularly appreciated that, the hardware architecture of the first mobile stations 13b˜13c and the second mobile stations 15a˜15b is the same as that of the first mobile station 13a, and thus only the first mobile station 13a is illustrated herein as an example for ease of understanding, as will be readily appreciated by those skilled in the art. The interaction between the SC-PTM network system 1 and the devices thereof will be further described hereinafter.

Facts

Application

15/093,617Filed 7 Apr 2016 · us provisional application

Priority

10 Apr 2015

Published

US 2016/0301538 A113 Oct 2016

Granted

26 Dec 2017

Term ends

2 Jul 2036

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 86 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification7 codes

H04L 12/1868
Comprising mechanisms for improved reliability, e.g. status reports: measures taken after transmission, e.g. acknowledgments
H04L 1/0003
By adapting the transmission rate: by switching between different modulation schemes
H04L 1/0009
Systems modifying transmission characteristics according to link quality, e.g. power backoff: by adapting the channel coding
H04L 1/1816
Hybrid protocols; Hybrid automatic repeat request [HARQ]: with retransmission of the same, encoded, message

Timeline

10 Apr 2015Priority claimedParent application 62/145,522
7 Apr 2016Application filedUS 15/093,617
7 Apr 2016Assigned to Institute for Information Industryassignment of assignor's interest
13 Oct 2016PublishedUS 2016/0301538 A1
26 Dec 2017GrantedUS 9,853,825 B2
12 Oct 2026TodayWithin its term
2 Jul 2036Term endsEstimated, includes 86 days of adjustment

Single cell point to multi-points network system and data transmission method thereof

Life of this patent

Single cell point to multi-points network system and data transmission method thereof

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims25

Description7,683 words

Drawings

Classification7 codes

Life of this patent

Description7,683 words